diff options
Diffstat (limited to 'src/seastar/fmt/include')
| -rw-r--r-- | src/seastar/fmt/include/fmt/chrono.h | 406 | ||||
| -rw-r--r-- | src/seastar/fmt/include/fmt/color.h | 499 | ||||
| -rw-r--r-- | src/seastar/fmt/include/fmt/core.h | 1507 | ||||
| -rw-r--r-- | src/seastar/fmt/include/fmt/format-inl.h | 972 | ||||
| -rw-r--r-- | src/seastar/fmt/include/fmt/format.h | 3714 | ||||
| -rw-r--r-- | src/seastar/fmt/include/fmt/locale.h | 77 | ||||
| -rw-r--r-- | src/seastar/fmt/include/fmt/ostream.h | 153 | ||||
| -rw-r--r-- | src/seastar/fmt/include/fmt/posix.h | 324 | ||||
| -rw-r--r-- | src/seastar/fmt/include/fmt/printf.h | 728 | ||||
| -rw-r--r-- | src/seastar/fmt/include/fmt/ranges.h | 308 | ||||
| -rw-r--r-- | src/seastar/fmt/include/fmt/time.h | 161 |
11 files changed, 8849 insertions, 0 deletions
diff --git a/src/seastar/fmt/include/fmt/chrono.h b/src/seastar/fmt/include/fmt/chrono.h new file mode 100644 index 00000000..6610e62e --- /dev/null +++ b/src/seastar/fmt/include/fmt/chrono.h @@ -0,0 +1,406 @@ +// Formatting library for C++ - chrono support +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_CHRONO_H_ +#define FMT_CHRONO_H_ + +#include "format.h" +#include "locale.h" + +#include <chrono> +#include <ctime> +#include <locale> +#include <sstream> + +FMT_BEGIN_NAMESPACE + +namespace internal{ + +enum class numeric_system { + standard, + // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale. + alternative +}; + +// Parses a put_time-like format string and invokes handler actions. +template <typename Char, typename Handler> +FMT_CONSTEXPR const Char *parse_chrono_format( + const Char *begin, const Char *end, Handler &&handler) { + auto ptr = begin; + while (ptr != end) { + auto c = *ptr; + if (c == '}') break; + if (c != '%') { + ++ptr; + continue; + } + if (begin != ptr) + handler.on_text(begin, ptr); + ++ptr; // consume '%' + if (ptr == end) + throw format_error("invalid format"); + c = *ptr++; + switch (c) { + case '%': + handler.on_text(ptr - 1, ptr); + break; + case 'n': { + const char newline[] = "\n"; + handler.on_text(newline, newline + 1); + break; + } + case 't': { + const char tab[] = "\t"; + handler.on_text(tab, tab + 1); + break; + } + // Day of the week: + case 'a': + handler.on_abbr_weekday(); + break; + case 'A': + handler.on_full_weekday(); + break; + case 'w': + handler.on_dec0_weekday(numeric_system::standard); + break; + case 'u': + handler.on_dec1_weekday(numeric_system::standard); + break; + // Month: + case 'b': + handler.on_abbr_month(); + break; + case 'B': + handler.on_full_month(); + break; + // Hour, minute, second: + case 'H': + handler.on_24_hour(numeric_system::standard); + break; + case 'I': + handler.on_12_hour(numeric_system::standard); + break; + case 'M': + handler.on_minute(numeric_system::standard); + break; + case 'S': + handler.on_second(numeric_system::standard); + break; + // Other: + case 'c': + handler.on_datetime(numeric_system::standard); + break; + case 'x': + handler.on_loc_date(numeric_system::standard); + break; + case 'X': + handler.on_loc_time(numeric_system::standard); + break; + case 'D': + handler.on_us_date(); + break; + case 'F': + handler.on_iso_date(); + break; + case 'r': + handler.on_12_hour_time(); + break; + case 'R': + handler.on_24_hour_time(); + break; + case 'T': + handler.on_iso_time(); + break; + case 'p': + handler.on_am_pm(); + break; + case 'z': + handler.on_utc_offset(); + break; + case 'Z': + handler.on_tz_name(); + break; + // Alternative representation: + case 'E': { + if (ptr == end) + throw format_error("invalid format"); + c = *ptr++; + switch (c) { + case 'c': + handler.on_datetime(numeric_system::alternative); + break; + case 'x': + handler.on_loc_date(numeric_system::alternative); + break; + case 'X': + handler.on_loc_time(numeric_system::alternative); + break; + default: + throw format_error("invalid format"); + } + break; + } + case 'O': + if (ptr == end) + throw format_error("invalid format"); + c = *ptr++; + switch (c) { + case 'w': + handler.on_dec0_weekday(numeric_system::alternative); + break; + case 'u': + handler.on_dec1_weekday(numeric_system::alternative); + break; + case 'H': + handler.on_24_hour(numeric_system::alternative); + break; + case 'I': + handler.on_12_hour(numeric_system::alternative); + break; + case 'M': + handler.on_minute(numeric_system::alternative); + break; + case 'S': + handler.on_second(numeric_system::alternative); + break; + default: + throw format_error("invalid format"); + } + break; + default: + throw format_error("invalid format"); + } + begin = ptr; + } + if (begin != ptr) + handler.on_text(begin, ptr); + return ptr; +} + +struct chrono_format_checker { + void report_no_date() { throw format_error("no date"); } + + template <typename Char> + void on_text(const Char *, const Char *) {} + void on_abbr_weekday() { report_no_date(); } + void on_full_weekday() { report_no_date(); } + void on_dec0_weekday(numeric_system) { report_no_date(); } + void on_dec1_weekday(numeric_system) { report_no_date(); } + void on_abbr_month() { report_no_date(); } + void on_full_month() { report_no_date(); } + void on_24_hour(numeric_system) {} + void on_12_hour(numeric_system) {} + void on_minute(numeric_system) {} + void on_second(numeric_system) {} + void on_datetime(numeric_system) { report_no_date(); } + void on_loc_date(numeric_system) { report_no_date(); } + void on_loc_time(numeric_system) { report_no_date(); } + void on_us_date() { report_no_date(); } + void on_iso_date() { report_no_date(); } + void on_12_hour_time() {} + void on_24_hour_time() {} + void on_iso_time() {} + void on_am_pm() {} + void on_utc_offset() { report_no_date(); } + void on_tz_name() { report_no_date(); } +}; + +template <typename Int> +inline int to_int(Int value) { + FMT_ASSERT(value >= (std::numeric_limits<int>::min)() && + value <= (std::numeric_limits<int>::max)(), "invalid value"); + return static_cast<int>(value); +} + +template <typename FormatContext> +struct chrono_formatter { + FormatContext &context; + typename FormatContext::iterator out; + std::chrono::seconds s; + std::chrono::milliseconds ms; + + typedef typename FormatContext::char_type char_type; + + explicit chrono_formatter(FormatContext &ctx) + : context(ctx), out(ctx.out()) {} + + int hour() const { return to_int((s.count() / 3600) % 24); } + + int hour12() const { + auto hour = to_int((s.count() / 3600) % 12); + return hour > 0 ? hour : 12; + } + + int minute() const { return to_int((s.count() / 60) % 60); } + int second() const { return to_int(s.count() % 60); } + + std::tm time() const { + auto time = std::tm(); + time.tm_hour = hour(); + time.tm_min = minute(); + time.tm_sec = second(); + return time; + } + + void write(int value, int width) { + typedef typename int_traits<int>::main_type main_type; + main_type n = to_unsigned(value); + int num_digits = static_cast<int>(internal::count_digits(n)); + if (width > num_digits) + out = std::fill_n(out, width - num_digits, '0'); + out = format_decimal<char_type>(out, n, num_digits); + } + + void format_localized(const tm &time, const char *format) { + auto locale = context.locale().template get<std::locale>(); + auto &facet = std::use_facet<std::time_put<char_type>>(locale); + std::basic_ostringstream<char_type> os; + os.imbue(locale); + facet.put(os, os, ' ', &time, format, format + std::strlen(format)); + auto str = os.str(); + std::copy(str.begin(), str.end(), out); + } + + void on_text(const char_type *begin, const char_type *end) { + std::copy(begin, end, out); + } + + // These are not implemented because durations don't have date information. + void on_abbr_weekday() {} + void on_full_weekday() {} + void on_dec0_weekday(numeric_system) {} + void on_dec1_weekday(numeric_system) {} + void on_abbr_month() {} + void on_full_month() {} + void on_datetime(numeric_system) {} + void on_loc_date(numeric_system) {} + void on_loc_time(numeric_system) {} + void on_us_date() {} + void on_iso_date() {} + void on_utc_offset() {} + void on_tz_name() {} + + void on_24_hour(numeric_system ns) { + if (ns == numeric_system::standard) + return write(hour(), 2); + auto time = tm(); + time.tm_hour = hour(); + format_localized(time, "%OH"); + } + + void on_12_hour(numeric_system ns) { + if (ns == numeric_system::standard) + return write(hour12(), 2); + auto time = tm(); + time.tm_hour = hour(); + format_localized(time, "%OI"); + } + + void on_minute(numeric_system ns) { + if (ns == numeric_system::standard) + return write(minute(), 2); + auto time = tm(); + time.tm_min = minute(); + format_localized(time, "%OM"); + } + + void on_second(numeric_system ns) { + if (ns == numeric_system::standard) { + write(second(), 2); + if (ms != std::chrono::milliseconds(0)) { + *out++ = '.'; + write(to_int(ms.count()), 3); + } + return; + } + auto time = tm(); + time.tm_sec = second(); + format_localized(time, "%OS"); + } + + void on_12_hour_time() { format_localized(time(), "%r"); } + + void on_24_hour_time() { + write(hour(), 2); + *out++ = ':'; + write(minute(), 2); + } + + void on_iso_time() { + on_24_hour_time(); + *out++ = ':'; + write(second(), 2); + } + + void on_am_pm() { format_localized(time(), "%p"); } +}; +} // namespace internal + +template <typename Period> FMT_CONSTEXPR const char *get_units() { + return FMT_NULL; +} +template <> FMT_CONSTEXPR const char *get_units<std::atto>() { return "as"; } +template <> FMT_CONSTEXPR const char *get_units<std::femto>() { return "fs"; } +template <> FMT_CONSTEXPR const char *get_units<std::pico>() { return "ps"; } +template <> FMT_CONSTEXPR const char *get_units<std::nano>() { return "ns"; } +template <> FMT_CONSTEXPR const char *get_units<std::micro>() { return "µs"; } +template <> FMT_CONSTEXPR const char *get_units<std::milli>() { return "ms"; } +template <> FMT_CONSTEXPR const char *get_units<std::centi>() { return "cs"; } +template <> FMT_CONSTEXPR const char *get_units<std::deci>() { return "ds"; } +template <> FMT_CONSTEXPR const char *get_units<std::ratio<1>>() { return "s"; } +template <> FMT_CONSTEXPR const char *get_units<std::deca>() { return "das"; } +template <> FMT_CONSTEXPR const char *get_units<std::hecto>() { return "hs"; } +template <> FMT_CONSTEXPR const char *get_units<std::kilo>() { return "ks"; } +template <> FMT_CONSTEXPR const char *get_units<std::mega>() { return "Ms"; } +template <> FMT_CONSTEXPR const char *get_units<std::giga>() { return "Gs"; } +template <> FMT_CONSTEXPR const char *get_units<std::tera>() { return "Ts"; } +template <> FMT_CONSTEXPR const char *get_units<std::peta>() { return "Ps"; } +template <> FMT_CONSTEXPR const char *get_units<std::exa>() { return "Es"; } +template <> FMT_CONSTEXPR const char *get_units<std::ratio<60>>() { + return "m"; +} +template <> FMT_CONSTEXPR const char *get_units<std::ratio<3600>>() { + return "h"; +} + +template <typename Rep, typename Period, typename Char> +struct formatter<std::chrono::duration<Rep, Period>, Char> { + mutable basic_string_view<Char> format_str; + typedef std::chrono::duration<Rep, Period> duration; + + FMT_CONSTEXPR auto parse(basic_parse_context<Char> &ctx) + -> decltype(ctx.begin()) { + auto begin = ctx.begin(), end = ctx.end(); + end = parse_chrono_format(begin, end, internal::chrono_format_checker()); + format_str = basic_string_view<Char>(&*begin, end - begin); + return end; + } + + template <typename FormatContext> + auto format(const duration &d, FormatContext &ctx) + -> decltype(ctx.out()) { + auto begin = format_str.begin(), end = format_str.end(); + if (begin == end || *begin == '}') { + if (const char *unit = get_units<Period>()) + return format_to(ctx.out(), "{}{}", d.count(), unit); + if (Period::den == 1) + return format_to(ctx.out(), "{}[{}s]", d.count(), Period::num); + return format_to(ctx.out(), "{}[{}/{}s]", + d.count(), Period::num, Period::den); + } + internal::chrono_formatter<FormatContext> f(ctx); + f.s = std::chrono::duration_cast<std::chrono::seconds>(d); + f.ms = std::chrono::duration_cast<std::chrono::milliseconds>(d - f.s); + parse_chrono_format(begin, end, f); + return f.out; + } +}; + +FMT_END_NAMESPACE + +#endif // FMT_CHRONO_H_ diff --git a/src/seastar/fmt/include/fmt/color.h b/src/seastar/fmt/include/fmt/color.h new file mode 100644 index 00000000..78b78956 --- /dev/null +++ b/src/seastar/fmt/include/fmt/color.h @@ -0,0 +1,499 @@ +// Formatting library for C++ - color support +// +// Copyright (c) 2018 - present, Victor Zverovich and fmt contributors +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_COLOR_H_ +#define FMT_COLOR_H_ + +#include "format.h" + +FMT_BEGIN_NAMESPACE + +#ifdef FMT_DEPRECATED_COLORS + +// color and (v)print_colored are deprecated. +enum color { black, red, green, yellow, blue, magenta, cyan, white }; +FMT_API void vprint_colored(color c, string_view format, format_args args); +FMT_API void vprint_colored(color c, wstring_view format, wformat_args args); +template <typename... Args> +inline void print_colored(color c, string_view format_str, + const Args & ... args) { + vprint_colored(c, format_str, make_format_args(args...)); +} +template <typename... Args> +inline void print_colored(color c, wstring_view format_str, + const Args & ... args) { + vprint_colored(c, format_str, make_format_args<wformat_context>(args...)); +} + +inline void vprint_colored(color c, string_view format, format_args args) { + char escape[] = "\x1b[30m"; + escape[3] = static_cast<char>('0' + c); + std::fputs(escape, stdout); + vprint(format, args); + std::fputs(internal::data::RESET_COLOR, stdout); +} + +inline void vprint_colored(color c, wstring_view format, wformat_args args) { + wchar_t escape[] = L"\x1b[30m"; + escape[3] = static_cast<wchar_t>('0' + c); + std::fputws(escape, stdout); + vprint(format, args); + std::fputws(internal::data::WRESET_COLOR, stdout); +} + +#else + +enum class color : uint32_t { + alice_blue = 0xF0F8FF, // rgb(240,248,255) + antique_white = 0xFAEBD7, // rgb(250,235,215) + aqua = 0x00FFFF, // rgb(0,255,255) + aquamarine = 0x7FFFD4, // rgb(127,255,212) + azure = 0xF0FFFF, // rgb(240,255,255) + beige = 0xF5F5DC, // rgb(245,245,220) + bisque = 0xFFE4C4, // rgb(255,228,196) + black = 0x000000, // rgb(0,0,0) + blanched_almond = 0xFFEBCD, // rgb(255,235,205) + blue = 0x0000FF, // rgb(0,0,255) + blue_violet = 0x8A2BE2, // rgb(138,43,226) + brown = 0xA52A2A, // rgb(165,42,42) + burly_wood = 0xDEB887, // rgb(222,184,135) + cadet_blue = 0x5F9EA0, // rgb(95,158,160) + chartreuse = 0x7FFF00, // rgb(127,255,0) + chocolate = 0xD2691E, // rgb(210,105,30) + coral = 0xFF7F50, // rgb(255,127,80) + cornflower_blue = 0x6495ED, // rgb(100,149,237) + cornsilk = 0xFFF8DC, // rgb(255,248,220) + crimson = 0xDC143C, // rgb(220,20,60) + cyan = 0x00FFFF, // rgb(0,255,255) + dark_blue = 0x00008B, // rgb(0,0,139) + dark_cyan = 0x008B8B, // rgb(0,139,139) + dark_golden_rod = 0xB8860B, // rgb(184,134,11) + dark_gray = 0xA9A9A9, // rgb(169,169,169) + dark_green = 0x006400, // rgb(0,100,0) + dark_khaki = 0xBDB76B, // rgb(189,183,107) + dark_magenta = 0x8B008B, // rgb(139,0,139) + dark_olive_green = 0x556B2F, // rgb(85,107,47) + dark_orange = 0xFF8C00, // rgb(255,140,0) + dark_orchid = 0x9932CC, // rgb(153,50,204) + dark_red = 0x8B0000, // rgb(139,0,0) + dark_salmon = 0xE9967A, // rgb(233,150,122) + dark_sea_green = 0x8FBC8F, // rgb(143,188,143) + dark_slate_blue = 0x483D8B, // rgb(72,61,139) + dark_slate_gray = 0x2F4F4F, // rgb(47,79,79) + dark_turquoise = 0x00CED1, // rgb(0,206,209) + dark_violet = 0x9400D3, // rgb(148,0,211) + deep_pink = 0xFF1493, // rgb(255,20,147) + deep_sky_blue = 0x00BFFF, // rgb(0,191,255) + dim_gray = 0x696969, // rgb(105,105,105) + dodger_blue = 0x1E90FF, // rgb(30,144,255) + fire_brick = 0xB22222, // rgb(178,34,34) + floral_white = 0xFFFAF0, // rgb(255,250,240) + forest_green = 0x228B22, // rgb(34,139,34) + fuchsia = 0xFF00FF, // rgb(255,0,255) + gainsboro = 0xDCDCDC, // rgb(220,220,220) + ghost_white = 0xF8F8FF, // rgb(248,248,255) + gold = 0xFFD700, // rgb(255,215,0) + golden_rod = 0xDAA520, // rgb(218,165,32) + gray = 0x808080, // rgb(128,128,128) + green = 0x008000, // rgb(0,128,0) + green_yellow = 0xADFF2F, // rgb(173,255,47) + honey_dew = 0xF0FFF0, // rgb(240,255,240) + hot_pink = 0xFF69B4, // rgb(255,105,180) + indian_red = 0xCD5C5C, // rgb(205,92,92) + indigo = 0x4B0082, // rgb(75,0,130) + ivory = 0xFFFFF0, // rgb(255,255,240) + khaki = 0xF0E68C, // rgb(240,230,140) + lavender = 0xE6E6FA, // rgb(230,230,250) + lavender_blush = 0xFFF0F5, // rgb(255,240,245) + lawn_green = 0x7CFC00, // rgb(124,252,0) + lemon_chiffon = 0xFFFACD, // rgb(255,250,205) + light_blue = 0xADD8E6, // rgb(173,216,230) + light_coral = 0xF08080, // rgb(240,128,128) + light_cyan = 0xE0FFFF, // rgb(224,255,255) + light_golden_rod_yellow = 0xFAFAD2, // rgb(250,250,210) + light_gray = 0xD3D3D3, // rgb(211,211,211) + light_green = 0x90EE90, // rgb(144,238,144) + light_pink = 0xFFB6C1, // rgb(255,182,193) + light_salmon = 0xFFA07A, // rgb(255,160,122) + light_sea_green = 0x20B2AA, // rgb(32,178,170) + light_sky_blue = 0x87CEFA, // rgb(135,206,250) + light_slate_gray = 0x778899, // rgb(119,136,153) + light_steel_blue = 0xB0C4DE, // rgb(176,196,222) + light_yellow = 0xFFFFE0, // rgb(255,255,224) + lime = 0x00FF00, // rgb(0,255,0) + lime_green = 0x32CD32, // rgb(50,205,50) + linen = 0xFAF0E6, // rgb(250,240,230) + magenta = 0xFF00FF, // rgb(255,0,255) + maroon = 0x800000, // rgb(128,0,0) + medium_aquamarine = 0x66CDAA, // rgb(102,205,170) + medium_blue = 0x0000CD, // rgb(0,0,205) + medium_orchid = 0xBA55D3, // rgb(186,85,211) + medium_purple = 0x9370DB, // rgb(147,112,219) + medium_sea_green = 0x3CB371, // rgb(60,179,113) + medium_slate_blue = 0x7B68EE, // rgb(123,104,238) + medium_spring_green = 0x00FA9A, // rgb(0,250,154) + medium_turquoise = 0x48D1CC, // rgb(72,209,204) + medium_violet_red = 0xC71585, // rgb(199,21,133) + midnight_blue = 0x191970, // rgb(25,25,112) + mint_cream = 0xF5FFFA, // rgb(245,255,250) + misty_rose = 0xFFE4E1, // rgb(255,228,225) + moccasin = 0xFFE4B5, // rgb(255,228,181) + navajo_white = 0xFFDEAD, // rgb(255,222,173) + navy = 0x000080, // rgb(0,0,128) + old_lace = 0xFDF5E6, // rgb(253,245,230) + olive = 0x808000, // rgb(128,128,0) + olive_drab = 0x6B8E23, // rgb(107,142,35) + orange = 0xFFA500, // rgb(255,165,0) + orange_red = 0xFF4500, // rgb(255,69,0) + orchid = 0xDA70D6, // rgb(218,112,214) + pale_golden_rod = 0xEEE8AA, // rgb(238,232,170) + pale_green = 0x98FB98, // rgb(152,251,152) + pale_turquoise = 0xAFEEEE, // rgb(175,238,238) + pale_violet_red = 0xDB7093, // rgb(219,112,147) + papaya_whip = 0xFFEFD5, // rgb(255,239,213) + peach_puff = 0xFFDAB9, // rgb(255,218,185) + peru = 0xCD853F, // rgb(205,133,63) + pink = 0xFFC0CB, // rgb(255,192,203) + plum = 0xDDA0DD, // rgb(221,160,221) + powder_blue = 0xB0E0E6, // rgb(176,224,230) + purple = 0x800080, // rgb(128,0,128) + rebecca_purple = 0x663399, // rgb(102,51,153) + red = 0xFF0000, // rgb(255,0,0) + rosy_brown = 0xBC8F8F, // rgb(188,143,143) + royal_blue = 0x4169E1, // rgb(65,105,225) + saddle_brown = 0x8B4513, // rgb(139,69,19) + salmon = 0xFA8072, // rgb(250,128,114) + sandy_brown = 0xF4A460, // rgb(244,164,96) + sea_green = 0x2E8B57, // rgb(46,139,87) + sea_shell = 0xFFF5EE, // rgb(255,245,238) + sienna = 0xA0522D, // rgb(160,82,45) + silver = 0xC0C0C0, // rgb(192,192,192) + sky_blue = 0x87CEEB, // rgb(135,206,235) + slate_blue = 0x6A5ACD, // rgb(106,90,205) + slate_gray = 0x708090, // rgb(112,128,144) + snow = 0xFFFAFA, // rgb(255,250,250) + spring_green = 0x00FF7F, // rgb(0,255,127) + steel_blue = 0x4682B4, // rgb(70,130,180) + tan = 0xD2B48C, // rgb(210,180,140) + teal = 0x008080, // rgb(0,128,128) + thistle = 0xD8BFD8, // rgb(216,191,216) + tomato = 0xFF6347, // rgb(255,99,71) + turquoise = 0x40E0D0, // rgb(64,224,208) + violet = 0xEE82EE, // rgb(238,130,238) + wheat = 0xF5DEB3, // rgb(245,222,179) + white = 0xFFFFFF, // rgb(255,255,255) + white_smoke = 0xF5F5F5, // rgb(245,245,245) + yellow = 0xFFFF00, // rgb(255,255,0) + yellow_green = 0x9ACD32 // rgb(154,205,50) +}; // enum class color + +enum class emphasis : uint8_t { + bold = 1, + italic = 1 << 1, + underline = 1 << 2, + strikethrough = 1 << 3 +}; // enum class emphasis + +// rgb is a struct for red, green and blue colors. +// We use rgb as name because some editors will show it as color direct in the +// editor. +struct rgb { + FMT_CONSTEXPR_DECL rgb() : r(0), g(0), b(0) {} + FMT_CONSTEXPR_DECL rgb(uint8_t r_, uint8_t g_, uint8_t b_) + : r(r_), g(g_), b(b_) {} + FMT_CONSTEXPR_DECL rgb(uint32_t hex) + : r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b((hex) & 0xFF) {} + FMT_CONSTEXPR_DECL rgb(color hex) + : r((uint32_t(hex) >> 16) & 0xFF), g((uint32_t(hex) >> 8) & 0xFF), + b(uint32_t(hex) & 0xFF) {} + uint8_t r; + uint8_t g; + uint8_t b; +}; + +// Experimental text formatting support. +class text_style { + public: + FMT_CONSTEXPR text_style(emphasis em = emphasis()) FMT_NOEXCEPT + : set_foreground_color(), set_background_color(), ems(em) {} + + FMT_CONSTEXPR_DECL + text_style &operator|=(const text_style &rhs) FMT_NOEXCEPT { + if (!set_foreground_color) { + set_foreground_color = rhs.set_foreground_color; + foreground_color = rhs.foreground_color; + } else if (rhs.set_foreground_color) { + foreground_color.r |= rhs.foreground_color.r; + foreground_color.g |= rhs.foreground_color.g; + foreground_color.b |= rhs.foreground_color.b; + } + + if (!set_background_color) { + set_background_color = rhs.set_background_color; + background_color = rhs.background_color; + } else if (rhs.set_background_color) { + background_color.r |= rhs.background_color.r; + background_color.g |= rhs.background_color.g; + background_color.b |= rhs.background_color.b; + } + + ems = static_cast<emphasis>(static_cast<uint8_t>(ems) | + static_cast<uint8_t>(rhs.ems)); + return *this; + } + + friend FMT_CONSTEXPR + text_style operator|(text_style lhs, const text_style &rhs) FMT_NOEXCEPT { + return lhs |= rhs; + } + + FMT_CONSTEXPR text_style &operator&=(const text_style &rhs) FMT_NOEXCEPT { + if (!set_foreground_color) { + set_foreground_color = rhs.set_foreground_color; + foreground_color = rhs.foreground_color; + } else if (rhs.set_foreground_color) { + foreground_color.r &= rhs.foreground_color.r; + foreground_color.g &= rhs.foreground_color.g; + foreground_color.b &= rhs.foreground_color.b; + } + + if (!set_background_color) { + set_background_color = rhs.set_background_color; + background_color = rhs.background_color; + } else if (rhs.set_background_color) { + background_color.r &= rhs.background_color.r; + background_color.g &= rhs.background_color.g; + background_color.b &= rhs.background_color.b; + } + + ems = static_cast<emphasis>(static_cast<uint8_t>(ems) & + static_cast<uint8_t>(rhs.ems)); + return *this; + } + + friend FMT_CONSTEXPR + text_style operator&(text_style lhs, const text_style &rhs) FMT_NOEXCEPT { + return lhs &= rhs; + } + + FMT_CONSTEXPR bool has_foreground() const FMT_NOEXCEPT { + return set_foreground_color; + } + FMT_CONSTEXPR bool has_background() const FMT_NOEXCEPT { + return set_background_color; + } + FMT_CONSTEXPR bool has_emphasis() const FMT_NOEXCEPT { + return static_cast<uint8_t>(ems) != 0; + } + FMT_CONSTEXPR rgb get_foreground() const FMT_NOEXCEPT { + assert(has_foreground() && "no foreground specified for this style"); + return foreground_color; + } + FMT_CONSTEXPR rgb get_background() const FMT_NOEXCEPT { + assert(has_background() && "no background specified for this style"); + return background_color; + } + FMT_CONSTEXPR emphasis get_emphasis() const FMT_NOEXCEPT { + assert(has_emphasis() && "no emphasis specified for this style"); + return ems; + } + +private: + FMT_CONSTEXPR text_style(bool is_foreground, rgb text_color) FMT_NOEXCEPT + : set_foreground_color(), set_background_color(), ems() { + if (is_foreground) { + foreground_color = text_color; + set_foreground_color = true; + } else { + background_color = text_color; + set_background_color = true; + } + } + + friend FMT_CONSTEXPR_DECL text_style fg(rgb foreground) FMT_NOEXCEPT; + friend FMT_CONSTEXPR_DECL text_style bg(rgb background) FMT_NOEXCEPT; + + rgb foreground_color; + rgb background_color; + bool set_foreground_color; + bool set_background_color; + emphasis ems; +}; + +FMT_CONSTEXPR text_style fg(rgb foreground) FMT_NOEXCEPT { + return text_style(/*is_foreground=*/true, foreground); +} + +FMT_CONSTEXPR text_style bg(rgb background) FMT_NOEXCEPT { + return text_style(/*is_foreground=*/false, background); +} + +FMT_CONSTEXPR text_style operator|(emphasis lhs, emphasis rhs) FMT_NOEXCEPT { + return text_style(lhs) | rhs; +} + +namespace internal { + +template <typename Char> +struct ansi_color_escape { + FMT_CONSTEXPR ansi_color_escape(rgb color, const char * esc) FMT_NOEXCEPT { + for (int i = 0; i < 7; i++) { + buffer[i] = static_cast<Char>(esc[i]); + } + to_esc(color.r, buffer + 7, ';'); + to_esc(color.g, buffer + 11, ';'); + to_esc(color.b, buffer + 15, 'm'); + buffer[19] = static_cast<Char>(0); + } + FMT_CONSTEXPR ansi_color_escape(emphasis em) FMT_NOEXCEPT { + uint8_t em_codes[4] = {}; + uint8_t em_bits = static_cast<uint8_t>(em); + if (em_bits & static_cast<uint8_t>(emphasis::bold)) + em_codes[0] = 1; + if (em_bits & static_cast<uint8_t>(emphasis::italic)) + em_codes[1] = 3; + if (em_bits & static_cast<uint8_t>(emphasis::underline)) + em_codes[2] = 4; + if (em_bits & static_cast<uint8_t>(emphasis::strikethrough)) + em_codes[3] = 9; + + std::size_t index = 0; + for (int i = 0; i < 4; ++i) { + if (!em_codes[i]) + continue; + buffer[index++] = static_cast<Char>('\x1b'); + buffer[index++] = static_cast<Char>('['); + buffer[index++] = static_cast<Char>('0' + em_codes[i]); + buffer[index++] = static_cast<Char>('m'); + } + buffer[index++] = static_cast<Char>(0); + } + FMT_CONSTEXPR operator const Char *() const FMT_NOEXCEPT { return buffer; } + +private: + Char buffer[7 + 3 * 4 + 1]; + + static FMT_CONSTEXPR void to_esc(uint8_t c, Char *out, + char delimiter) FMT_NOEXCEPT { + out[0] = static_cast<Char>('0' + c / 100); + out[1] = static_cast<Char>('0' + c / 10 % 10); + out[2] = static_cast<Char>('0' + c % 10); + out[3] = static_cast<Char>(delimiter); + } +}; + +template <typename Char> +FMT_CONSTEXPR ansi_color_escape<Char> +make_foreground_color(rgb color) FMT_NOEXCEPT { + return ansi_color_escape<Char>(color, internal::data::FOREGROUND_COLOR); +} + +template <typename Char> +FMT_CONSTEXPR ansi_color_escape<Char> +make_background_color(rgb color) FMT_NOEXCEPT { + return ansi_color_escape<Char>(color, internal::data::BACKGROUND_COLOR); +} + +template <typename Char> +FMT_CONSTEXPR ansi_color_escape<Char> +make_emphasis(emphasis em) FMT_NOEXCEPT { + return ansi_color_escape<Char>(em); +} + +template <typename Char> +inline void fputs(const Char *chars, FILE *stream) FMT_NOEXCEPT { + std::fputs(chars, stream); +} + +template <> +inline void fputs<wchar_t>(const wchar_t *chars, FILE *stream) FMT_NOEXCEPT { + std::fputws(chars, stream); +} + +template <typename Char> +inline void reset_color(FILE *stream) FMT_NOEXCEPT { + fputs(internal::data::RESET_COLOR, stream); +} + +template <> +inline void reset_color<wchar_t>(FILE *stream) FMT_NOEXCEPT { + fputs(internal::data::WRESET_COLOR, stream); +} + +// The following specialiazation disables using std::FILE as a character type, +// which is needed because or else +// fmt::print(stderr, fmt::emphasis::bold, ""); +// would take stderr (a std::FILE *) as the format string. +template <> +struct is_string<std::FILE *> : std::false_type {}; +template <> +struct is_string<const std::FILE *> : std::false_type {}; +} // namespace internal + +template < + typename S, typename Char = typename internal::char_t<S>::type> +void vprint(std::FILE *f, const text_style &ts, const S &format, + basic_format_args<typename buffer_context<Char>::type> args) { + bool has_style = false; + if (ts.has_emphasis()) { + has_style = true; + internal::fputs<Char>( + internal::make_emphasis<Char>(ts.get_emphasis()), f); + } + if (ts.has_foreground()) { + has_style = true; + internal::fputs<Char>( + internal::make_foreground_color<Char>(ts.get_foreground()), f); + } + if (ts.has_background()) { + has_style = true; + internal::fputs<Char>( + internal::make_background_color<Char>(ts.get_background()), f); + } + vprint(f, format, args); + if (has_style) { + internal::reset_color<Char>(f); + } +} + +/** + Formats a string and prints it to the specified file stream using ANSI + escape sequences to specify text formatting. + Example: + fmt::print(fmt::emphasis::bold | fg(fmt::color::red), + "Elapsed time: {0:.2f} seconds", 1.23); + */ +template <typename String, typename... Args> +typename std::enable_if<internal::is_string<String>::value>::type print( + std::FILE *f, const text_style &ts, const String &format_str, + const Args &... args) { + internal::check_format_string<Args...>(format_str); + typedef typename internal::char_t<String>::type char_t; + typedef typename buffer_context<char_t>::type context_t; + format_arg_store<context_t, Args...> as{args...}; + vprint(f, ts, format_str, basic_format_args<context_t>(as)); +} + +/** + Formats a string and prints it to stdout using ANSI escape sequences to + specify text formatting. + Example: + fmt::print(fmt::emphasis::bold | fg(fmt::color::red), + "Elapsed time: {0:.2f} seconds", 1.23); + */ +template <typename String, typename... Args> +typename std::enable_if<internal::is_string<String>::value>::type print( + const text_style &ts, const String &format_str, + const Args &... args) { + return print(stdout, ts, format_str, args...); +} + +#endif + +FMT_END_NAMESPACE + +#endif // FMT_COLOR_H_ diff --git a/src/seastar/fmt/include/fmt/core.h b/src/seastar/fmt/include/fmt/core.h new file mode 100644 index 00000000..a867d8d7 --- /dev/null +++ b/src/seastar/fmt/include/fmt/core.h @@ -0,0 +1,1507 @@ +// Formatting library for C++ - the core API +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_CORE_H_ +#define FMT_CORE_H_ + +#include <cassert> +#include <cstdio> // std::FILE +#include <cstring> +#include <iterator> +#include <string> +#include <type_traits> + +// The fmt library version in the form major * 10000 + minor * 100 + patch. +#define FMT_VERSION 50202 + +#ifdef __has_feature +# define FMT_HAS_FEATURE(x) __has_feature(x) +#else +# define FMT_HAS_FEATURE(x) 0 +#endif + +#if defined(__has_include) && !defined(__INTELLISENSE__) && \ + !(defined(__INTEL_COMPILER) && __INTEL_COMPILER < 1600) +# define FMT_HAS_INCLUDE(x) __has_include(x) +#else +# define FMT_HAS_INCLUDE(x) 0 +#endif + +#ifdef __has_cpp_attribute +# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x) +#else +# define FMT_HAS_CPP_ATTRIBUTE(x) 0 +#endif + +#if defined(__GNUC__) && !defined(__clang__) +# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) +#else +# define FMT_GCC_VERSION 0 +#endif + +#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__) +# define FMT_HAS_GXX_CXX11 FMT_GCC_VERSION +#else +# define FMT_HAS_GXX_CXX11 0 +#endif + +#ifdef _MSC_VER +# define FMT_MSC_VER _MSC_VER +#else +# define FMT_MSC_VER 0 +#endif + +// Check if relaxed C++14 constexpr is supported. +// GCC doesn't allow throw in constexpr until version 6 (bug 67371). +#ifndef FMT_USE_CONSTEXPR +# define FMT_USE_CONSTEXPR \ + (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VER >= 1910 || \ + (FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L)) +#endif +#if FMT_USE_CONSTEXPR +# define FMT_CONSTEXPR constexpr +# define FMT_CONSTEXPR_DECL constexpr +#else +# define FMT_CONSTEXPR inline +# define FMT_CONSTEXPR_DECL +#endif + +#ifndef FMT_USE_CONSTEXPR11 +# define FMT_USE_CONSTEXPR11 \ + (FMT_USE_CONSTEXPR || FMT_GCC_VERSION >= 406 || FMT_MSC_VER >= 1900) +#endif +#if FMT_USE_CONSTEXPR11 +# define FMT_CONSTEXPR11 constexpr +#else +# define FMT_CONSTEXPR11 +#endif + +#ifndef FMT_OVERRIDE +# if FMT_HAS_FEATURE(cxx_override) || \ + (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900 +# define FMT_OVERRIDE override +# else +# define FMT_OVERRIDE +# endif +#endif + +#if FMT_HAS_FEATURE(cxx_explicit_conversions) || \ + FMT_GCC_VERSION >= 405 || FMT_MSC_VER >= 1800 +# define FMT_USE_EXPLICIT 1 +# define FMT_EXPLICIT explicit +#else +# define FMT_USE_EXPLICIT 0 +# define FMT_EXPLICIT +#endif + +#ifndef FMT_NULL +# if FMT_HAS_FEATURE(cxx_nullptr) || \ + (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1600 +# define FMT_NULL nullptr +# define FMT_USE_NULLPTR 1 +# else +# define FMT_NULL NULL +# endif +#endif +#ifndef FMT_USE_NULLPTR +# define FMT_USE_NULLPTR 0 +#endif + +// Check if exceptions are disabled. +#ifndef FMT_EXCEPTIONS +# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \ + FMT_MSC_VER && !_HAS_EXCEPTIONS +# define FMT_EXCEPTIONS 0 +# else +# define FMT_EXCEPTIONS 1 +# endif +#endif + +// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature). +#ifndef FMT_USE_NOEXCEPT +# define FMT_USE_NOEXCEPT 0 +#endif + +#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \ + (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900 +# define FMT_DETECTED_NOEXCEPT noexcept +# define FMT_HAS_CXX11_NOEXCEPT 1 +#else +# define FMT_DETECTED_NOEXCEPT throw() +# define FMT_HAS_CXX11_NOEXCEPT 0 +#endif + +#ifndef FMT_NOEXCEPT +# if FMT_EXCEPTIONS || FMT_HAS_CXX11_NOEXCEPT +# define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT +# else +# define FMT_NOEXCEPT +# endif +#endif + +#ifndef FMT_BEGIN_NAMESPACE +# if FMT_HAS_FEATURE(cxx_inline_namespaces) || FMT_GCC_VERSION >= 404 || \ + FMT_MSC_VER >= 1900 +# define FMT_INLINE_NAMESPACE inline namespace +# define FMT_END_NAMESPACE }} +# else +# define FMT_INLINE_NAMESPACE namespace +# define FMT_END_NAMESPACE } using namespace v5; } +# endif +# define FMT_BEGIN_NAMESPACE namespace fmt { FMT_INLINE_NAMESPACE v5 { +#endif + +#if !defined(FMT_HEADER_ONLY) && defined(_WIN32) +# ifdef FMT_EXPORT +# define FMT_API __declspec(dllexport) +# elif defined(FMT_SHARED) +# define FMT_API __declspec(dllimport) +# endif +#endif +#ifndef FMT_API +# define FMT_API +#endif + +#ifndef FMT_ASSERT +# define FMT_ASSERT(condition, message) assert((condition) && message) +#endif + +// libc++ supports string_view in pre-c++17. +#if (FMT_HAS_INCLUDE(<string_view>) && \ + (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \ + (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910) +# include <string_view> +# define FMT_STRING_VIEW std::basic_string_view +#elif FMT_HAS_INCLUDE(<experimental/string_view>) && __cplusplus >= 201402L +# include <experimental/string_view> +# define FMT_STRING_VIEW std::experimental::basic_string_view +#endif + +// std::result_of is defined in <functional> in gcc 4.4. +#if FMT_GCC_VERSION && FMT_GCC_VERSION <= 404 +# include <functional> +#endif + +FMT_BEGIN_NAMESPACE +namespace internal { + +// An implementation of declval for pre-C++11 compilers such as gcc 4. +template <typename T> +typename std::add_rvalue_reference<T>::type declval() FMT_NOEXCEPT; + +template <typename> +struct result_of; + +template <typename F, typename... Args> +struct result_of<F(Args...)> { + // A workaround for gcc 4.4 that doesn't allow F to be a reference. + typedef typename std::result_of< + typename std::remove_reference<F>::type(Args...)>::type type; +}; + +// Casts nonnegative integer to unsigned. +template <typename Int> +FMT_CONSTEXPR typename std::make_unsigned<Int>::type to_unsigned(Int value) { + FMT_ASSERT(value >= 0, "negative value"); + return static_cast<typename std::make_unsigned<Int>::type>(value); +} + +/** A contiguous memory buffer with an optional growing ability. */ +template <typename T> +class basic_buffer { + private: + basic_buffer(const basic_buffer &) = delete; + void operator=(const basic_buffer &) = delete; + + T *ptr_; + std::size_t size_; + std::size_t capacity_; + + protected: + // Don't initialize ptr_ since it is not accessed to save a few cycles. + basic_buffer(std::size_t sz) FMT_NOEXCEPT: size_(sz), capacity_(sz) {} + + basic_buffer(T *p = FMT_NULL, std::size_t sz = 0, std::size_t cap = 0) + FMT_NOEXCEPT: ptr_(p), size_(sz), capacity_(cap) {} + + /** Sets the buffer data and capacity. */ + void set(T *buf_data, std::size_t buf_capacity) FMT_NOEXCEPT { + ptr_ = buf_data; + capacity_ = buf_capacity; + } + + /** Increases the buffer capacity to hold at least *capacity* elements. */ + virtual void grow(std::size_t capacity) = 0; + + public: + typedef T value_type; + typedef const T &const_reference; + + virtual ~basic_buffer() {} + + T *begin() FMT_NOEXCEPT { return ptr_; } + T *end() FMT_NOEXCEPT { return ptr_ + size_; } + + /** Returns the size of this buffer. */ + std::size_t size() const FMT_NOEXCEPT { return size_; } + + /** Returns the capacity of this buffer. */ + std::size_t capacity() const FMT_NOEXCEPT { return capacity_; } + + /** Returns a pointer to the buffer data. */ + T *data() FMT_NOEXCEPT { return ptr_; } + + /** Returns a pointer to the buffer data. */ + const T *data() const FMT_NOEXCEPT { return ptr_; } + + /** + Resizes the buffer. If T is a POD type new elements may not be initialized. + */ + void resize(std::size_t new_size) { + reserve(new_size); + size_ = new_size; + } + + /** Clears this buffer. */ + void clear() { size_ = 0; } + + /** Reserves space to store at least *capacity* elements. */ + void reserve(std::size_t new_capacity) { + if (new_capacity > capacity_) + grow(new_capacity); + } + + void push_back(const T &value) { + reserve(size_ + 1); + ptr_[size_++] = value; + } + + /** Appends data to the end of the buffer. */ + template <typename U> + void append(const U *begin, const U *end); + + T &operator[](std::size_t index) { return ptr_[index]; } + const T &operator[](std::size_t index) const { return ptr_[index]; } +}; + +typedef basic_buffer<char> buffer; +typedef basic_buffer<wchar_t> wbuffer; + +// A container-backed buffer. +template <typename Container> +class container_buffer : public basic_buffer<typename Container::value_type> { + private: + Container &container_; + + protected: + void grow(std::size_t capacity) FMT_OVERRIDE { + container_.resize(capacity); + this->set(&container_[0], capacity); + } + + public: + explicit container_buffer(Container &c) + : basic_buffer<typename Container::value_type>(c.size()), container_(c) {} +}; + +// Extracts a reference to the container from back_insert_iterator. +template <typename Container> +inline Container &get_container(std::back_insert_iterator<Container> it) { + typedef std::back_insert_iterator<Container> bi_iterator; + struct accessor: bi_iterator { + accessor(bi_iterator iter) : bi_iterator(iter) {} + using bi_iterator::container; + }; + return *accessor(it).container; +} + +struct error_handler { + FMT_CONSTEXPR error_handler() {} + FMT_CONSTEXPR error_handler(const error_handler &) {} + + // This function is intentionally not constexpr to give a compile-time error. + FMT_API void on_error(const char *message); +}; + +template <typename T> +struct no_formatter_error : std::false_type {}; +} // namespace internal + +#if FMT_GCC_VERSION && FMT_GCC_VERSION < 405 +template <typename... T> +struct is_constructible: std::false_type {}; +#else +template <typename... T> +struct is_constructible : std::is_constructible<T...> {}; +#endif + +/** + An implementation of ``std::basic_string_view`` for pre-C++17. It provides a + subset of the API. ``fmt::basic_string_view`` is used for format strings even + if ``std::string_view`` is available to prevent issues when a library is + compiled with a different ``-std`` option than the client code (which is not + recommended). + */ +template <typename Char> +class basic_string_view { + private: + const Char *data_; + size_t size_; + + public: + typedef Char char_type; + typedef const Char *iterator; + + FMT_CONSTEXPR basic_string_view() FMT_NOEXCEPT : data_(FMT_NULL), size_(0) {} + + /** Constructs a string reference object from a C string and a size. */ + FMT_CONSTEXPR basic_string_view(const Char *s, size_t count) FMT_NOEXCEPT + : data_(s), size_(count) {} + + /** + \rst + Constructs a string reference object from a C string computing + the size with ``std::char_traits<Char>::length``. + \endrst + */ + basic_string_view(const Char *s) + : data_(s), size_(std::char_traits<Char>::length(s)) {} + + /** Constructs a string reference from a ``std::basic_string`` object. */ + template <typename Alloc> + FMT_CONSTEXPR basic_string_view( + const std::basic_string<Char, Alloc> &s) FMT_NOEXCEPT + : data_(s.data()), size_(s.size()) {} + +#ifdef FMT_STRING_VIEW + FMT_CONSTEXPR basic_string_view(FMT_STRING_VIEW<Char> s) FMT_NOEXCEPT + : data_(s.data()), size_(s.size()) {} +#endif + + /** Returns a pointer to the string data. */ + FMT_CONSTEXPR const Char *data() const { return data_; } + + /** Returns the string size. */ + FMT_CONSTEXPR size_t size() const { return size_; } + + FMT_CONSTEXPR iterator begin() const { return data_; } + FMT_CONSTEXPR iterator end() const { return data_ + size_; } + + FMT_CONSTEXPR void remove_prefix(size_t n) { + data_ += n; + size_ -= n; + } + + // Lexicographically compare this string reference to other. + int compare(basic_string_view other) const { + size_t str_size = size_ < other.size_ ? size_ : other.size_; + int result = std::char_traits<Char>::compare(data_, other.data_, str_size); + if (result == 0) + result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1); + return result; + } + + friend bool operator==(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) == 0; + } + friend bool operator!=(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) != 0; + } + friend bool operator<(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) < 0; + } + friend bool operator<=(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) <= 0; + } + friend bool operator>(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) > 0; + } + friend bool operator>=(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) >= 0; + } +}; + +typedef basic_string_view<char> string_view; +typedef basic_string_view<wchar_t> wstring_view; + +/** + \rst + The function ``to_string_view`` adapts non-intrusively any kind of string or + string-like type if the user provides a (possibly templated) overload of + ``to_string_view`` which takes an instance of the string class + ``StringType<Char>`` and returns a ``fmt::basic_string_view<Char>``. + The conversion function must live in the very same namespace as + ``StringType<Char>`` to be picked up by ADL. Non-templated string types + like f.e. QString must return a ``basic_string_view`` with a fixed matching + char type. + + **Example**:: + + namespace my_ns { + inline string_view to_string_view(const my_string &s) { + return { s.data(), s.length() }; + } + } + + std::string message = fmt::format(my_string("The answer is {}"), 42); + \endrst + */ +template <typename Char> +inline basic_string_view<Char> + to_string_view(basic_string_view<Char> s) { return s; } + +template <typename Char> +inline basic_string_view<Char> + to_string_view(const std::basic_string<Char> &s) { return s; } + +template <typename Char> +inline basic_string_view<Char> to_string_view(const Char *s) { return s; } + +#ifdef FMT_STRING_VIEW +template <typename Char> +inline basic_string_view<Char> + to_string_view(FMT_STRING_VIEW<Char> s) { return s; } +#endif + +// A base class for compile-time strings. It is defined in the fmt namespace to +// make formatting functions visible via ADL, e.g. format(fmt("{}"), 42). +struct compile_string {}; + +template <typename S> +struct is_compile_string : std::is_base_of<compile_string, S> {}; + +template < + typename S, + typename Enable = typename std::enable_if<is_compile_string<S>::value>::type> +FMT_CONSTEXPR basic_string_view<typename S::char_type> + to_string_view(const S &s) { return s; } + +template <typename Context> +class basic_format_arg; + +template <typename Context> +class basic_format_args; + +// A formatter for objects of type T. +template <typename T, typename Char = char, typename Enable = void> +struct formatter { + static_assert(internal::no_formatter_error<T>::value, + "don't know how to format the type, include fmt/ostream.h if it provides " + "an operator<< that should be used"); + + // The following functions are not defined intentionally. + template <typename ParseContext> + typename ParseContext::iterator parse(ParseContext &); + template <typename FormatContext> + auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out()); +}; + +template <typename T, typename Char, typename Enable = void> +struct convert_to_int: std::integral_constant< + bool, !std::is_arithmetic<T>::value && std::is_convertible<T, int>::value> {}; + +namespace internal { + +struct dummy_string_view { typedef void char_type; }; +dummy_string_view to_string_view(...); +using fmt::v5::to_string_view; + +// Specifies whether S is a string type convertible to fmt::basic_string_view. +template <typename S> +struct is_string : std::integral_constant<bool, !std::is_same< + dummy_string_view, decltype(to_string_view(declval<S>()))>::value> {}; + +template <typename S> +struct char_t { + typedef decltype(to_string_view(declval<S>())) result; + typedef typename result::char_type type; +}; + +template <typename Char> +struct named_arg_base; + +template <typename T, typename Char> +struct named_arg; + +enum type { + none_type, named_arg_type, + // Integer types should go first, + int_type, uint_type, long_long_type, ulong_long_type, bool_type, char_type, + last_integer_type = char_type, + // followed by floating-point types. + double_type, long_double_type, last_numeric_type = long_double_type, + cstring_type, string_type, pointer_type, custom_type +}; + +FMT_CONSTEXPR bool is_integral(type t) { + FMT_ASSERT(t != internal::named_arg_type, "invalid argument type"); + return t > internal::none_type && t <= internal::last_integer_type; +} + +FMT_CONSTEXPR bool is_arithmetic(type t) { + FMT_ASSERT(t != internal::named_arg_type, "invalid argument type"); + return t > internal::none_type && t <= internal::last_numeric_type; +} + +template <typename Char> +struct string_value { + const Char *value; + std::size_t size; +}; + +template <typename Context> +struct custom_value { + const void *value; + void (*format)(const void *arg, Context &ctx); +}; + +// A formatting argument value. +template <typename Context> +class value { + public: + typedef typename Context::char_type char_type; + + union { + int int_value; + unsigned uint_value; + long long long_long_value; + unsigned long long ulong_long_value; + double double_value; + long double long_double_value; + const void *pointer; + string_value<char_type> string; + string_value<signed char> sstring; + string_value<unsigned char> ustring; + custom_value<Context> custom; + }; + + FMT_CONSTEXPR value(int val = 0) : int_value(val) {} + value(unsigned val) { uint_value = val; } + value(long long val) { long_long_value = val; } + value(unsigned long long val) { ulong_long_value = val; } + value(double val) { double_value = val; } + value(long double val) { long_double_value = val; } + value(const char_type *val) { string.value = val; } + value(const signed char *val) { + static_assert(std::is_same<char, char_type>::value, + "incompatible string types"); + sstring.value = val; + } + value(const unsigned char *val) { + static_assert(std::is_same<char, char_type>::value, + "incompatible string types"); + ustring.value = val; + } + value(basic_string_view<char_type> val) { + string.value = val.data(); + string.size = val.size(); + } + value(const void *val) { pointer = val; } + + template <typename T> + explicit value(const T &val) { + custom.value = &val; + custom.format = &format_custom_arg<T>; + } + + const named_arg_base<char_type> &as_named_arg() { + return *static_cast<const named_arg_base<char_type>*>(pointer); + } + + private: + // Formats an argument of a custom type, such as a user-defined class. + template <typename T> + static void format_custom_arg(const void *arg, Context &ctx) { + // Get the formatter type through the context to allow different contexts + // have different extension points, e.g. `formatter<T>` for `format` and + // `printf_formatter<T>` for `printf`. + typename Context::template formatter_type<T>::type f; + auto &&parse_ctx = ctx.parse_context(); + parse_ctx.advance_to(f.parse(parse_ctx)); + ctx.advance_to(f.format(*static_cast<const T*>(arg), ctx)); + } +}; + +// Value initializer used to delay conversion to value and reduce memory churn. +template <typename Context, typename T, type TYPE> +struct init { + T val; + static const type type_tag = TYPE; + + FMT_CONSTEXPR init(const T &v) : val(v) {} + FMT_CONSTEXPR operator value<Context>() const { return value<Context>(val); } +}; + +template <typename Context, typename T> +FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T &value); + +#define FMT_MAKE_VALUE(TAG, ArgType, ValueType) \ + template <typename C> \ + FMT_CONSTEXPR init<C, ValueType, TAG> make_value(ArgType val) { \ + return static_cast<ValueType>(val); \ + } + +#define FMT_MAKE_VALUE_SAME(TAG, Type) \ + template <typename C> \ + FMT_CONSTEXPR init<C, Type, TAG> make_value(Type val) { return val; } + +FMT_MAKE_VALUE(bool_type, bool, int) +FMT_MAKE_VALUE(int_type, short, int) +FMT_MAKE_VALUE(uint_type, unsigned short, unsigned) +FMT_MAKE_VALUE_SAME(int_type, int) +FMT_MAKE_VALUE_SAME(uint_type, unsigned) + +// To minimize the number of types we need to deal with, long is translated +// either to int or to long long depending on its size. +typedef std::conditional<sizeof(long) == sizeof(int), int, long long>::type + long_type; +FMT_MAKE_VALUE( + (sizeof(long) == sizeof(int) ? int_type : long_long_type), long, long_type) +typedef std::conditional<sizeof(unsigned long) == sizeof(unsigned), + unsigned, unsigned long long>::type ulong_type; +FMT_MAKE_VALUE( + (sizeof(unsigned long) == sizeof(unsigned) ? uint_type : ulong_long_type), + unsigned long, ulong_type) + +FMT_MAKE_VALUE_SAME(long_long_type, long long) +FMT_MAKE_VALUE_SAME(ulong_long_type, unsigned long long) +FMT_MAKE_VALUE(int_type, signed char, int) +FMT_MAKE_VALUE(uint_type, unsigned char, unsigned) + +// This doesn't use FMT_MAKE_VALUE because of ambiguity in gcc 4.4. +template <typename C, typename Char> +FMT_CONSTEXPR typename std::enable_if< + std::is_same<typename C::char_type, Char>::value, + init<C, int, char_type>>::type make_value(Char val) { return val; } + +template <typename C> +FMT_CONSTEXPR typename std::enable_if< + !std::is_same<typename C::char_type, char>::value, + init<C, int, char_type>>::type make_value(char val) { return val; } + +FMT_MAKE_VALUE(double_type, float, double) +FMT_MAKE_VALUE_SAME(double_type, double) +FMT_MAKE_VALUE_SAME(long_double_type, long double) + +// Formatting of wide strings into a narrow buffer and multibyte strings +// into a wide buffer is disallowed (https://github.com/fmtlib/fmt/pull/606). +FMT_MAKE_VALUE(cstring_type, typename C::char_type*, + const typename C::char_type*) +FMT_MAKE_VALUE(cstring_type, const typename C::char_type*, + const typename C::char_type*) + +FMT_MAKE_VALUE(cstring_type, signed char*, const signed char*) +FMT_MAKE_VALUE_SAME(cstring_type, const signed char*) +FMT_MAKE_VALUE(cstring_type, unsigned char*, const unsigned char*) +FMT_MAKE_VALUE_SAME(cstring_type, const unsigned char*) +FMT_MAKE_VALUE_SAME(string_type, basic_string_view<typename C::char_type>) +FMT_MAKE_VALUE(string_type, + typename basic_string_view<typename C::char_type>::type, + basic_string_view<typename C::char_type>) +FMT_MAKE_VALUE(string_type, const std::basic_string<typename C::char_type>&, + basic_string_view<typename C::char_type>) +FMT_MAKE_VALUE(pointer_type, void*, const void*) +FMT_MAKE_VALUE_SAME(pointer_type, const void*) + +#if FMT_USE_NULLPTR +FMT_MAKE_VALUE(pointer_type, std::nullptr_t, const void*) +#endif + +// Formatting of arbitrary pointers is disallowed. If you want to output a +// pointer cast it to "void *" or "const void *". In particular, this forbids +// formatting of "[const] volatile char *" which is printed as bool by +// iostreams. +template <typename C, typename T> +typename std::enable_if<!std::is_same<T, typename C::char_type>::value>::type + make_value(const T *) { + static_assert(!sizeof(T), "formatting of non-void pointers is disallowed"); +} + +template <typename C, typename T> +inline typename std::enable_if< + std::is_enum<T>::value && convert_to_int<T, typename C::char_type>::value, + init<C, int, int_type>>::type + make_value(const T &val) { return static_cast<int>(val); } + +template <typename C, typename T, typename Char = typename C::char_type> +inline typename std::enable_if< + is_constructible<basic_string_view<Char>, T>::value && + !internal::is_string<T>::value, + init<C, basic_string_view<Char>, string_type>>::type + make_value(const T &val) { return basic_string_view<Char>(val); } + +template <typename C, typename T, typename Char = typename C::char_type> +inline typename std::enable_if< + !convert_to_int<T, Char>::value && !std::is_same<T, Char>::value && + !std::is_convertible<T, basic_string_view<Char>>::value && + !is_constructible<basic_string_view<Char>, T>::value && + !internal::is_string<T>::value, + // Implicit conversion to std::string is not handled here because it's + // unsafe: https://github.com/fmtlib/fmt/issues/729 + init<C, const T &, custom_type>>::type + make_value(const T &val) { return val; } + +template <typename C, typename T> +init<C, const void*, named_arg_type> + make_value(const named_arg<T, typename C::char_type> &val) { + basic_format_arg<C> arg = make_arg<C>(val.value); + std::memcpy(val.data, &arg, sizeof(arg)); + return static_cast<const void*>(&val); +} + +template <typename C, typename S> +FMT_CONSTEXPR11 typename std::enable_if< + internal::is_string<S>::value, + init<C, basic_string_view<typename C::char_type>, string_type>>::type + make_value(const S &val) { + // Handle adapted strings. + static_assert(std::is_same< + typename C::char_type, typename internal::char_t<S>::type>::value, + "mismatch between char-types of context and argument"); + return to_string_view(val); +} + +// Maximum number of arguments with packed types. +enum { max_packed_args = 15 }; +enum : unsigned long long { is_unpacked_bit = 1ull << 63 }; + +template <typename Context> +class arg_map; +} // namespace internal + +// A formatting argument. It is a trivially copyable/constructible type to +// allow storage in basic_memory_buffer. +template <typename Context> +class basic_format_arg { + private: + internal::value<Context> value_; + internal::type type_; + + template <typename ContextType, typename T> + friend FMT_CONSTEXPR basic_format_arg<ContextType> + internal::make_arg(const T &value); + + template <typename Visitor, typename Ctx> + friend FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type + visit_format_arg(Visitor &&vis, const basic_format_arg<Ctx> &arg); + + friend class basic_format_args<Context>; + friend class internal::arg_map<Context>; + + typedef typename Context::char_type char_type; + + public: + class handle { + public: + explicit handle(internal::custom_value<Context> custom): custom_(custom) {} + + void format(Context &ctx) const { custom_.format(custom_.value, ctx); } + + private: + internal::custom_value<Context> custom_; + }; + + FMT_CONSTEXPR basic_format_arg() : type_(internal::none_type) {} + + FMT_EXPLICIT operator bool() const FMT_NOEXCEPT { + return type_ != internal::none_type; + } + + internal::type type() const { return type_; } + + bool is_integral() const { return internal::is_integral(type_); } + bool is_arithmetic() const { return internal::is_arithmetic(type_); } +}; + +struct monostate {}; + +/** + \rst + Visits an argument dispatching to the appropriate visit method based on + the argument type. For example, if the argument type is ``double`` then + ``vis(value)`` will be called with the value of type ``double``. + \endrst + */ +template <typename Visitor, typename Context> +FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type + visit_format_arg(Visitor &&vis, const basic_format_arg<Context> &arg) { + typedef typename Context::char_type char_type; + switch (arg.type_) { + case internal::none_type: + break; + case internal::named_arg_type: + FMT_ASSERT(false, "invalid argument type"); + break; + case internal::int_type: + return vis(arg.value_.int_value); + case internal::uint_type: + return vis(arg.value_.uint_value); + case internal::long_long_type: + return vis(arg.value_.long_long_value); + case internal::ulong_long_type: + return vis(arg.value_.ulong_long_value); + case internal::bool_type: + return vis(arg.value_.int_value != 0); + case internal::char_type: + return vis(static_cast<char_type>(arg.value_.int_value)); + case internal::double_type: + return vis(arg.value_.double_value); + case internal::long_double_type: + return vis(arg.value_.long_double_value); + case internal::cstring_type: + return vis(arg.value_.string.value); + case internal::string_type: + return vis(basic_string_view<char_type>( + arg.value_.string.value, arg.value_.string.size)); + case internal::pointer_type: + return vis(arg.value_.pointer); + case internal::custom_type: + return vis(typename basic_format_arg<Context>::handle(arg.value_.custom)); + } + return vis(monostate()); +} + +template <typename Visitor, typename Context> +FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type + visit(Visitor &&vis, const basic_format_arg<Context> &arg) { + return visit_format_arg(std::forward<Visitor>(vis), arg); +} + +// Parsing context consisting of a format string range being parsed and an +// argument counter for automatic indexing. +template <typename Char, typename ErrorHandler = internal::error_handler> +class basic_parse_context : private ErrorHandler { + private: + basic_string_view<Char> format_str_; + int next_arg_id_; + + public: + typedef Char char_type; + typedef typename basic_string_view<Char>::iterator iterator; + + explicit FMT_CONSTEXPR basic_parse_context( + basic_string_view<Char> format_str, ErrorHandler eh = ErrorHandler()) + : ErrorHandler(eh), format_str_(format_str), next_arg_id_(0) {} + + // Returns an iterator to the beginning of the format string range being + // parsed. + FMT_CONSTEXPR iterator begin() const FMT_NOEXCEPT { + return format_str_.begin(); + } + + // Returns an iterator past the end of the format string range being parsed. + FMT_CONSTEXPR iterator end() const FMT_NOEXCEPT { return format_str_.end(); } + + // Advances the begin iterator to ``it``. + FMT_CONSTEXPR void advance_to(iterator it) { + format_str_.remove_prefix(internal::to_unsigned(it - begin())); + } + + // Returns the next argument index. + FMT_CONSTEXPR unsigned next_arg_id(); + + FMT_CONSTEXPR bool check_arg_id(unsigned) { + if (next_arg_id_ > 0) { + on_error("cannot switch from automatic to manual argument indexing"); + return false; + } + next_arg_id_ = -1; + return true; + } + void check_arg_id(basic_string_view<Char>) {} + + FMT_CONSTEXPR void on_error(const char *message) { + ErrorHandler::on_error(message); + } + + FMT_CONSTEXPR ErrorHandler error_handler() const { return *this; } +}; + +typedef basic_parse_context<char> format_parse_context; +typedef basic_parse_context<wchar_t> wformat_parse_context; + +// DEPRECATED! +typedef basic_parse_context<char> parse_context; +typedef basic_parse_context<wchar_t> wparse_context; + +namespace internal { +// A map from argument names to their values for named arguments. +template <typename Context> +class arg_map { + private: + arg_map(const arg_map &) = delete; + void operator=(const arg_map &) = delete; + + typedef typename Context::char_type char_type; + + struct entry { + basic_string_view<char_type> name; + basic_format_arg<Context> arg; + }; + + entry *map_; + unsigned size_; + + void push_back(value<Context> val) { + const internal::named_arg_base<char_type> &named = val.as_named_arg(); + map_[size_] = entry{named.name, named.template deserialize<Context>()}; + ++size_; + } + + public: + arg_map() : map_(FMT_NULL), size_(0) {} + void init(const basic_format_args<Context> &args); + ~arg_map() { delete [] map_; } + + basic_format_arg<Context> find(basic_string_view<char_type> name) const { + // The list is unsorted, so just return the first matching name. + for (entry *it = map_, *end = map_ + size_; it != end; ++it) { + if (it->name == name) + return it->arg; + } + return {}; + } +}; + +// A type-erased reference to an std::locale to avoid heavy <locale> include. +class locale_ref { + private: + const void *locale_; // A type-erased pointer to std::locale. + friend class locale; + + public: + locale_ref() : locale_(FMT_NULL) {} + + template <typename Locale> + explicit locale_ref(const Locale &loc); + + template <typename Locale> + Locale get() const; +}; + +template <typename OutputIt, typename Context, typename Char> +class context_base { + public: + typedef OutputIt iterator; + + private: + basic_parse_context<Char> parse_context_; + iterator out_; + basic_format_args<Context> args_; + locale_ref loc_; + + protected: + typedef Char char_type; + typedef basic_format_arg<Context> format_arg; + + context_base(OutputIt out, basic_string_view<char_type> format_str, + basic_format_args<Context> ctx_args, + locale_ref loc = locale_ref()) + : parse_context_(format_str), out_(out), args_(ctx_args), loc_(loc) {} + + // Returns the argument with specified index. + format_arg do_get_arg(unsigned arg_id) { + format_arg arg = args_.get(arg_id); + if (!arg) + parse_context_.on_error("argument index out of range"); + return arg; + } + + // Checks if manual indexing is used and returns the argument with + // specified index. + format_arg get_arg(unsigned arg_id) { + return this->parse_context().check_arg_id(arg_id) ? + this->do_get_arg(arg_id) : format_arg(); + } + + public: + basic_parse_context<char_type> &parse_context() { return parse_context_; } + basic_format_args<Context> args() const { return args_; } // DEPRECATED! + basic_format_arg<Context> arg(unsigned id) const { return args_.get(id); } + + internal::error_handler error_handler() { + return parse_context_.error_handler(); + } + + void on_error(const char *message) { parse_context_.on_error(message); } + + // Returns an iterator to the beginning of the output range. + iterator out() { return out_; } + iterator begin() { return out_; } // deprecated + + // Advances the begin iterator to ``it``. + void advance_to(iterator it) { out_ = it; } + + locale_ref locale() { return loc_; } +}; + +template <typename Context, typename T> +struct get_type { + typedef decltype(make_value<Context>( + declval<typename std::decay<T>::type&>())) value_type; + static const type value = value_type::type_tag; +}; + +template <typename Context> +FMT_CONSTEXPR11 unsigned long long get_types() { return 0; } + +template <typename Context, typename Arg, typename... Args> +FMT_CONSTEXPR11 unsigned long long get_types() { + return get_type<Context, Arg>::value | (get_types<Context, Args...>() << 4); +} + +template <typename Context, typename T> +FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T &value) { + basic_format_arg<Context> arg; + arg.type_ = get_type<Context, T>::value; + arg.value_ = make_value<Context>(value); + return arg; +} + +template <bool IS_PACKED, typename Context, typename T> +inline typename std::enable_if<IS_PACKED, value<Context>>::type + make_arg(const T &value) { + return make_value<Context>(value); +} + +template <bool IS_PACKED, typename Context, typename T> +inline typename std::enable_if<!IS_PACKED, basic_format_arg<Context>>::type + make_arg(const T &value) { + return make_arg<Context>(value); +} +} // namespace internal + +// Formatting context. +template <typename OutputIt, typename Char> +class basic_format_context : + public internal::context_base< + OutputIt, basic_format_context<OutputIt, Char>, Char> { + public: + /** The character type for the output. */ + typedef Char char_type; + + // using formatter_type = formatter<T, char_type>; + template <typename T> + struct formatter_type { typedef formatter<T, char_type> type; }; + + private: + internal::arg_map<basic_format_context> map_; + + basic_format_context(const basic_format_context &) = delete; + void operator=(const basic_format_context &) = delete; + + typedef internal::context_base<OutputIt, basic_format_context, Char> base; + typedef typename base::format_arg format_arg; + using base::get_arg; + + public: + using typename base::iterator; + + /** + Constructs a ``basic_format_context`` object. References to the arguments are + stored in the object so make sure they have appropriate lifetimes. + */ + basic_format_context(OutputIt out, basic_string_view<char_type> format_str, + basic_format_args<basic_format_context> ctx_args, + internal::locale_ref loc = internal::locale_ref()) + : base(out, format_str, ctx_args, loc) {} + + format_arg next_arg() { + return this->do_get_arg(this->parse_context().next_arg_id()); + } + format_arg get_arg(unsigned arg_id) { return this->do_get_arg(arg_id); } + + // Checks if manual indexing is used and returns the argument with the + // specified name. + format_arg get_arg(basic_string_view<char_type> name); +}; + +template <typename Char> +struct buffer_context { + typedef basic_format_context< + std::back_insert_iterator<internal::basic_buffer<Char>>, Char> type; +}; +typedef buffer_context<char>::type format_context; +typedef buffer_context<wchar_t>::type wformat_context; + +/** + \rst + An array of references to arguments. It can be implicitly converted into + `~fmt::basic_format_args` for passing into type-erased formatting functions + such as `~fmt::vformat`. + \endrst + */ +template <typename Context, typename ...Args> +class format_arg_store { + private: + static const size_t NUM_ARGS = sizeof...(Args); + + // Packed is a macro on MinGW so use IS_PACKED instead. + static const bool IS_PACKED = NUM_ARGS < internal::max_packed_args; + + typedef typename std::conditional<IS_PACKED, + internal::value<Context>, basic_format_arg<Context>>::type value_type; + + // If the arguments are not packed, add one more element to mark the end. + static const size_t DATA_SIZE = + NUM_ARGS + (IS_PACKED && NUM_ARGS != 0 ? 0 : 1); + value_type data_[DATA_SIZE]; + + friend class basic_format_args<Context>; + + static FMT_CONSTEXPR11 unsigned long long get_types() { + return IS_PACKED ? + internal::get_types<Context, Args...>() : + internal::is_unpacked_bit | NUM_ARGS; + } + + public: +#if FMT_USE_CONSTEXPR11 + static FMT_CONSTEXPR11 unsigned long long TYPES = get_types(); +#else + static const unsigned long long TYPES; +#endif + +#if (FMT_GCC_VERSION && FMT_GCC_VERSION <= 405) || \ + (FMT_MSC_VER && FMT_MSC_VER <= 1800) + // Workaround array initialization issues in gcc <= 4.5 and MSVC <= 2013. + format_arg_store(const Args &... args) { + value_type init[DATA_SIZE] = + {internal::make_arg<IS_PACKED, Context>(args)...}; + std::memcpy(data_, init, sizeof(init)); + } +#else + format_arg_store(const Args &... args) + : data_{internal::make_arg<IS_PACKED, Context>(args)...} {} +#endif +}; + +#if !FMT_USE_CONSTEXPR11 +template <typename Context, typename ...Args> +const unsigned long long format_arg_store<Context, Args...>::TYPES = + get_types(); +#endif + +/** + \rst + Constructs an `~fmt::format_arg_store` object that contains references to + arguments and can be implicitly converted to `~fmt::format_args`. `Context` + can be omitted in which case it defaults to `~fmt::context`. + \endrst + */ +template <typename Context = format_context, typename ...Args> +inline format_arg_store<Context, Args...> + make_format_args(const Args &... args) { return {args...}; } + +/** Formatting arguments. */ +template <typename Context> +class basic_format_args { + public: + typedef unsigned size_type; + typedef basic_format_arg<Context> format_arg; + + private: + // To reduce compiled code size per formatting function call, types of first + // max_packed_args arguments are passed in the types_ field. + unsigned long long types_; + union { + // If the number of arguments is less than max_packed_args, the argument + // values are stored in values_, otherwise they are stored in args_. + // This is done to reduce compiled code size as storing larger objects + // may require more code (at least on x86-64) even if the same amount of + // data is actually copied to stack. It saves ~10% on the bloat test. + const internal::value<Context> *values_; + const format_arg *args_; + }; + + bool is_packed() const { return (types_ & internal::is_unpacked_bit) == 0; } + + typename internal::type type(unsigned index) const { + unsigned shift = index * 4; + return static_cast<typename internal::type>( + (types_ & (0xfull << shift)) >> shift); + } + + friend class internal::arg_map<Context>; + + void set_data(const internal::value<Context> *values) { values_ = values; } + void set_data(const format_arg *args) { args_ = args; } + + format_arg do_get(size_type index) const { + format_arg arg; + if (!is_packed()) { + auto num_args = max_size(); + if (index < num_args) + arg = args_[index]; + return arg; + } + if (index > internal::max_packed_args) + return arg; + arg.type_ = type(index); + if (arg.type_ == internal::none_type) + return arg; + internal::value<Context> &val = arg.value_; + val = values_[index]; + return arg; + } + + public: + basic_format_args() : types_(0) {} + + /** + \rst + Constructs a `basic_format_args` object from `~fmt::format_arg_store`. + \endrst + */ + template <typename... Args> + basic_format_args(const format_arg_store<Context, Args...> &store) + : types_(static_cast<unsigned long long>(store.TYPES)) { + set_data(store.data_); + } + + /** + \rst + Constructs a `basic_format_args` object from a dynamic set of arguments. + \endrst + */ + basic_format_args(const format_arg *args, size_type count) + : types_(internal::is_unpacked_bit | count) { + set_data(args); + } + + /** Returns the argument at specified index. */ + format_arg get(size_type index) const { + format_arg arg = do_get(index); + if (arg.type_ == internal::named_arg_type) + arg = arg.value_.as_named_arg().template deserialize<Context>(); + return arg; + } + + size_type max_size() const { + unsigned long long max_packed = internal::max_packed_args; + return static_cast<size_type>( + is_packed() ? max_packed : types_ & ~internal::is_unpacked_bit); + } +}; + +/** An alias to ``basic_format_args<context>``. */ +// It is a separate type rather than a typedef to make symbols readable. +struct format_args : basic_format_args<format_context> { + template <typename ...Args> + format_args(Args &&... arg) + : basic_format_args<format_context>(std::forward<Args>(arg)...) {} +}; +struct wformat_args : basic_format_args<wformat_context> { + template <typename ...Args> + wformat_args(Args &&... arg) + : basic_format_args<wformat_context>(std::forward<Args>(arg)...) {} +}; + +#ifndef FMT_USE_ALIAS_TEMPLATES +# define FMT_USE_ALIAS_TEMPLATES FMT_HAS_FEATURE(cxx_alias_templates) +#endif +#if FMT_USE_ALIAS_TEMPLATES +/** String's character type. */ +template <typename S> +using char_t = typename std::enable_if<internal::is_string<S>::value, + typename internal::char_t<S>::type>::type; +#define FMT_CHAR(S) fmt::char_t<S> + +template <typename S, typename T> +using enable_if_string_t = + typename std::enable_if<internal::is_string<S>::value, T>::type; +#define FMT_ENABLE_IF_STRING(S, T) enable_if_string_t<S, T> +#else +template <typename S> +struct char_t : std::enable_if< + internal::is_string<S>::value, typename internal::char_t<S>::type> {}; +#define FMT_CHAR(S) typename char_t<S>::type + +#define FMT_ENABLE_IF_STRING(S, T) \ + typename std::enable_if<internal::is_string<S>::value, T>::type +#endif + +namespace internal { +template <typename Char> +struct named_arg_base { + basic_string_view<Char> name; + + // Serialized value<context>. + mutable char data[ + sizeof(basic_format_arg<typename buffer_context<Char>::type>)]; + + named_arg_base(basic_string_view<Char> nm) : name(nm) {} + + template <typename Context> + basic_format_arg<Context> deserialize() const { + basic_format_arg<Context> arg; + std::memcpy(&arg, data, sizeof(basic_format_arg<Context>)); + return arg; + } +}; + +template <typename T, typename Char> +struct named_arg : named_arg_base<Char> { + const T &value; + + named_arg(basic_string_view<Char> name, const T &val) + : named_arg_base<Char>(name), value(val) {} +}; + +template <typename... Args, typename S> +inline typename std::enable_if<!is_compile_string<S>::value>::type + check_format_string(const S &) {} +template <typename... Args, typename S> +typename std::enable_if<is_compile_string<S>::value>::type + check_format_string(S); + +template <typename S, typename... Args> +struct checked_args : format_arg_store< + typename buffer_context<FMT_CHAR(S)>::type, Args...> { + typedef typename buffer_context<FMT_CHAR(S)>::type context; + + checked_args(const S &format_str, const Args &... args): + format_arg_store<context, Args...>(args...) { + internal::check_format_string<Args...>(format_str); + } + + basic_format_args<context> operator*() const { return *this; } +}; + +template <typename Char> +std::basic_string<Char> vformat( + basic_string_view<Char> format_str, + basic_format_args<typename buffer_context<Char>::type> args); + +template <typename Char> +typename buffer_context<Char>::type::iterator vformat_to( + internal::basic_buffer<Char> &buf, basic_string_view<Char> format_str, + basic_format_args<typename buffer_context<Char>::type> args); +} + +/** + \rst + Returns a named argument to be used in a formatting function. + + **Example**:: + + fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23)); + \endrst + */ +template <typename T> +inline internal::named_arg<T, char> arg(string_view name, const T &arg) { + return {name, arg}; +} + +template <typename T> +inline internal::named_arg<T, wchar_t> arg(wstring_view name, const T &arg) { + return {name, arg}; +} + +// Disable nested named arguments, e.g. ``arg("a", arg("b", 42))``. +template <typename S, typename T, typename Char> +void arg(S, internal::named_arg<T, Char>) = delete; + +template <typename Container> +struct is_contiguous: std::false_type {}; + +template <typename Char> +struct is_contiguous<std::basic_string<Char> >: std::true_type {}; + +template <typename Char> +struct is_contiguous<internal::basic_buffer<Char> >: std::true_type {}; + +/** Formats a string and writes the output to ``out``. */ +template <typename Container, typename S> +typename std::enable_if< + is_contiguous<Container>::value, std::back_insert_iterator<Container>>::type + vformat_to( + std::back_insert_iterator<Container> out, + const S &format_str, + basic_format_args<typename buffer_context<FMT_CHAR(S)>::type> args) { + internal::container_buffer<Container> buf(internal::get_container(out)); + internal::vformat_to(buf, to_string_view(format_str), args); + return out; +} + +template <typename Container, typename S, typename... Args> +inline typename std::enable_if< + is_contiguous<Container>::value && internal::is_string<S>::value, + std::back_insert_iterator<Container>>::type + format_to(std::back_insert_iterator<Container> out, const S &format_str, + const Args &... args) { + internal::checked_args<S, Args...> ca(format_str, args...); + return vformat_to(out, to_string_view(format_str), *ca); +} + +template <typename S, typename Char = FMT_CHAR(S)> +inline std::basic_string<Char> vformat( + const S &format_str, + basic_format_args<typename buffer_context<Char>::type> args) { + return internal::vformat(to_string_view(format_str), args); +} + +/** + \rst + Formats arguments and returns the result as a string. + + **Example**:: + + #include <fmt/core.h> + std::string message = fmt::format("The answer is {}", 42); + \endrst +*/ +template <typename S, typename... Args> +inline std::basic_string<FMT_CHAR(S)> format( + const S &format_str, const Args &... args) { + return internal::vformat( + to_string_view(format_str), + *internal::checked_args<S, Args...>(format_str, args...)); +} + +FMT_API void vprint(std::FILE *f, string_view format_str, format_args args); +FMT_API void vprint(std::FILE *f, wstring_view format_str, wformat_args args); + +/** + \rst + Prints formatted data to the file *f*. For wide format strings, + *f* should be in wide-oriented mode set via ``fwide(f, 1)`` or + ``_setmode(_fileno(f), _O_U8TEXT)`` on Windows. + + **Example**:: + + fmt::print(stderr, "Don't {}!", "panic"); + \endrst + */ +template <typename S, typename... Args> +inline FMT_ENABLE_IF_STRING(S, void) + print(std::FILE *f, const S &format_str, const Args &... args) { + vprint(f, to_string_view(format_str), + internal::checked_args<S, Args...>(format_str, args...)); +} + +FMT_API void vprint(string_view format_str, format_args args); +FMT_API void vprint(wstring_view format_str, wformat_args args); + +/** + \rst + Prints formatted data to ``stdout``. + + **Example**:: + + fmt::print("Elapsed time: {0:.2f} seconds", 1.23); + \endrst + */ +template <typename S, typename... Args> +inline FMT_ENABLE_IF_STRING(S, void) + print(const S &format_str, const Args &... args) { + vprint(to_string_view(format_str), + internal::checked_args<S, Args...>(format_str, args...)); +} +FMT_END_NAMESPACE + +#endif // FMT_CORE_H_ diff --git a/src/seastar/fmt/include/fmt/format-inl.h b/src/seastar/fmt/include/fmt/format-inl.h new file mode 100644 index 00000000..9b739635 --- /dev/null +++ b/src/seastar/fmt/include/fmt/format-inl.h @@ -0,0 +1,972 @@ +// Formatting library for C++ +// +// Copyright (c) 2012 - 2016, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_FORMAT_INL_H_ +#define FMT_FORMAT_INL_H_ + +#include "format.h" + +#include <string.h> + +#include <cctype> +#include <cerrno> +#include <climits> +#include <cmath> +#include <cstdarg> +#include <cstddef> // for std::ptrdiff_t +#include <cstring> // for std::memmove +#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR) +# include <locale> +#endif + +#if FMT_USE_WINDOWS_H +# if !defined(FMT_HEADER_ONLY) && !defined(WIN32_LEAN_AND_MEAN) +# define WIN32_LEAN_AND_MEAN +# endif +# if defined(NOMINMAX) || defined(FMT_WIN_MINMAX) +# include <windows.h> +# else +# define NOMINMAX +# include <windows.h> +# undef NOMINMAX +# endif +#endif + +#if FMT_EXCEPTIONS +# define FMT_TRY try +# define FMT_CATCH(x) catch (x) +#else +# define FMT_TRY if (true) +# define FMT_CATCH(x) if (false) +#endif + +#ifdef _MSC_VER +# pragma warning(push) +# pragma warning(disable: 4127) // conditional expression is constant +# pragma warning(disable: 4702) // unreachable code +// Disable deprecation warning for strerror. The latter is not called but +// MSVC fails to detect it. +# pragma warning(disable: 4996) +#endif + +// Dummy implementations of strerror_r and strerror_s called if corresponding +// system functions are not available. +inline fmt::internal::null<> strerror_r(int, char *, ...) { + return fmt::internal::null<>(); +} +inline fmt::internal::null<> strerror_s(char *, std::size_t, ...) { + return fmt::internal::null<>(); +} + +FMT_BEGIN_NAMESPACE + +namespace { + +#ifndef _MSC_VER +# define FMT_SNPRINTF snprintf +#else // _MSC_VER +inline int fmt_snprintf(char *buffer, size_t size, const char *format, ...) { + va_list args; + va_start(args, format); + int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args); + va_end(args); + return result; +} +# define FMT_SNPRINTF fmt_snprintf +#endif // _MSC_VER + +#if defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT) +# define FMT_SWPRINTF snwprintf +#else +# define FMT_SWPRINTF swprintf +#endif // defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT) + +typedef void (*FormatFunc)(internal::buffer &, int, string_view); + +// Portable thread-safe version of strerror. +// Sets buffer to point to a string describing the error code. +// This can be either a pointer to a string stored in buffer, +// or a pointer to some static immutable string. +// Returns one of the following values: +// 0 - success +// ERANGE - buffer is not large enough to store the error message +// other - failure +// Buffer should be at least of size 1. +int safe_strerror( + int error_code, char *&buffer, std::size_t buffer_size) FMT_NOEXCEPT { + FMT_ASSERT(buffer != FMT_NULL && buffer_size != 0, "invalid buffer"); + + class dispatcher { + private: + int error_code_; + char *&buffer_; + std::size_t buffer_size_; + + // A noop assignment operator to avoid bogus warnings. + void operator=(const dispatcher &) {} + + // Handle the result of XSI-compliant version of strerror_r. + int handle(int result) { + // glibc versions before 2.13 return result in errno. + return result == -1 ? errno : result; + } + + // Handle the result of GNU-specific version of strerror_r. + int handle(char *message) { + // If the buffer is full then the message is probably truncated. + if (message == buffer_ && strlen(buffer_) == buffer_size_ - 1) + return ERANGE; + buffer_ = message; + return 0; + } + + // Handle the case when strerror_r is not available. + int handle(internal::null<>) { + return fallback(strerror_s(buffer_, buffer_size_, error_code_)); + } + + // Fallback to strerror_s when strerror_r is not available. + int fallback(int result) { + // If the buffer is full then the message is probably truncated. + return result == 0 && strlen(buffer_) == buffer_size_ - 1 ? + ERANGE : result; + } + +#if !FMT_MSC_VER + // Fallback to strerror if strerror_r and strerror_s are not available. + int fallback(internal::null<>) { + errno = 0; + buffer_ = strerror(error_code_); + return errno; + } +#endif + + public: + dispatcher(int err_code, char *&buf, std::size_t buf_size) + : error_code_(err_code), buffer_(buf), buffer_size_(buf_size) {} + + int run() { + return handle(strerror_r(error_code_, buffer_, buffer_size_)); + } + }; + return dispatcher(error_code, buffer, buffer_size).run(); +} + +void format_error_code(internal::buffer &out, int error_code, + string_view message) FMT_NOEXCEPT { + // Report error code making sure that the output fits into + // inline_buffer_size to avoid dynamic memory allocation and potential + // bad_alloc. + out.resize(0); + static const char SEP[] = ": "; + static const char ERROR_STR[] = "error "; + // Subtract 2 to account for terminating null characters in SEP and ERROR_STR. + std::size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2; + typedef internal::int_traits<int>::main_type main_type; + main_type abs_value = static_cast<main_type>(error_code); + if (internal::is_negative(error_code)) { + abs_value = 0 - abs_value; + ++error_code_size; + } + error_code_size += internal::count_digits(abs_value); + writer w(out); + if (message.size() <= inline_buffer_size - error_code_size) { + w.write(message); + w.write(SEP); + } + w.write(ERROR_STR); + w.write(error_code); + assert(out.size() <= inline_buffer_size); +} + +void report_error(FormatFunc func, int error_code, + string_view message) FMT_NOEXCEPT { + memory_buffer full_message; + func(full_message, error_code, message); + // Use Writer::data instead of Writer::c_str to avoid potential memory + // allocation. + std::fwrite(full_message.data(), full_message.size(), 1, stderr); + std::fputc('\n', stderr); +} +} // namespace + +FMT_FUNC size_t internal::count_code_points(basic_string_view<char8_t> s) { + const char8_t *data = s.data(); + size_t num_code_points = 0; + for (size_t i = 0, size = s.size(); i != size; ++i) { + if ((data[i] & 0xc0) != 0x80) + ++num_code_points; + } + return num_code_points; +} + +#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR) +namespace internal { + +template <typename Locale> +locale_ref::locale_ref(const Locale &loc) : locale_(&loc) { + static_assert(std::is_same<Locale, std::locale>::value, ""); +} + +template <typename Locale> +Locale locale_ref::get() const { + static_assert(std::is_same<Locale, std::locale>::value, ""); + return locale_ ? *static_cast<const std::locale*>(locale_) : std::locale(); +} + +template <typename Char> +FMT_FUNC Char thousands_sep_impl(locale_ref loc) { + return std::use_facet<std::numpunct<Char> >( + loc.get<std::locale>()).thousands_sep(); +} +} +#else +template <typename Char> +FMT_FUNC Char internal::thousands_sep_impl(locale_ref) { + return FMT_STATIC_THOUSANDS_SEPARATOR; +} +#endif + +FMT_FUNC void system_error::init( + int err_code, string_view format_str, format_args args) { + error_code_ = err_code; + memory_buffer buffer; + format_system_error(buffer, err_code, vformat(format_str, args)); + std::runtime_error &base = *this; + base = std::runtime_error(to_string(buffer)); +} + +namespace internal { +template <typename T> +int char_traits<char>::format_float( + char *buf, std::size_t size, const char *format, int precision, T value) { + return precision < 0 ? + FMT_SNPRINTF(buf, size, format, value) : + FMT_SNPRINTF(buf, size, format, precision, value); +} + +template <typename T> +int char_traits<wchar_t>::format_float( + wchar_t *buf, std::size_t size, const wchar_t *format, int precision, + T value) { + return precision < 0 ? + FMT_SWPRINTF(buf, size, format, value) : + FMT_SWPRINTF(buf, size, format, precision, value); +} + +template <typename T> +const char basic_data<T>::DIGITS[] = + "0001020304050607080910111213141516171819" + "2021222324252627282930313233343536373839" + "4041424344454647484950515253545556575859" + "6061626364656667686970717273747576777879" + "8081828384858687888990919293949596979899"; + +#define FMT_POWERS_OF_10(factor) \ + factor * 10, \ + factor * 100, \ + factor * 1000, \ + factor * 10000, \ + factor * 100000, \ + factor * 1000000, \ + factor * 10000000, \ + factor * 100000000, \ + factor * 1000000000 + +template <typename T> +const uint32_t basic_data<T>::POWERS_OF_10_32[] = { + 1, FMT_POWERS_OF_10(1) +}; + +template <typename T> +const uint32_t basic_data<T>::ZERO_OR_POWERS_OF_10_32[] = { + 0, FMT_POWERS_OF_10(1) +}; + +template <typename T> +const uint64_t basic_data<T>::ZERO_OR_POWERS_OF_10_64[] = { + 0, + FMT_POWERS_OF_10(1), + FMT_POWERS_OF_10(1000000000ull), + 10000000000000000000ull +}; + +// Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340. +// These are generated by support/compute-powers.py. +template <typename T> +const uint64_t basic_data<T>::POW10_SIGNIFICANDS[] = { + 0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76, + 0xcf42894a5dce35ea, 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df, + 0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c, + 0x8dd01fad907ffc3c, 0xd3515c2831559a83, 0x9d71ac8fada6c9b5, + 0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57, + 0xc21094364dfb5637, 0x9096ea6f3848984f, 0xd77485cb25823ac7, + 0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e, + 0x84c8d4dfd2c63f3b, 0xc5dd44271ad3cdba, 0x936b9fcebb25c996, + 0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126, + 0xb5b5ada8aaff80b8, 0x87625f056c7c4a8b, 0xc9bcff6034c13053, + 0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f, + 0xf8a95fcf88747d94, 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b, + 0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06, + 0xaa242499697392d3, 0xfd87b5f28300ca0e, 0xbce5086492111aeb, + 0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000, + 0xe8d4a51000000000, 0xad78ebc5ac620000, 0x813f3978f8940984, + 0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068, + 0x9f4f2726179a2245, 0xed63a231d4c4fb27, 0xb0de65388cc8ada8, + 0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758, + 0xda01ee641a708dea, 0xa26da3999aef774a, 0xf209787bb47d6b85, + 0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d, + 0x952ab45cfa97a0b3, 0xde469fbd99a05fe3, 0xa59bc234db398c25, + 0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2, + 0xcc20ce9bd35c78a5, 0x98165af37b2153df, 0xe2a0b5dc971f303a, + 0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410, + 0x8bab8eefb6409c1a, 0xd01fef10a657842c, 0x9b10a4e5e9913129, + 0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85, + 0xbf21e44003acdd2d, 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841, + 0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b, +}; + +// Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding +// to significands above. +template <typename T> +const int16_t basic_data<T>::POW10_EXPONENTS[] = { + -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954, + -927, -901, -874, -847, -821, -794, -768, -741, -715, -688, -661, + -635, -608, -582, -555, -529, -502, -475, -449, -422, -396, -369, + -343, -316, -289, -263, -236, -210, -183, -157, -130, -103, -77, + -50, -24, 3, 30, 56, 83, 109, 136, 162, 189, 216, + 242, 269, 295, 322, 348, 375, 402, 428, 455, 481, 508, + 534, 561, 588, 614, 641, 667, 694, 720, 747, 774, 800, + 827, 853, 880, 907, 933, 960, 986, 1013, 1039, 1066 +}; + +template <typename T> const char basic_data<T>::FOREGROUND_COLOR[] = "\x1b[38;2;"; +template <typename T> const char basic_data<T>::BACKGROUND_COLOR[] = "\x1b[48;2;"; +template <typename T> const char basic_data<T>::RESET_COLOR[] = "\x1b[0m"; +template <typename T> const wchar_t basic_data<T>::WRESET_COLOR[] = L"\x1b[0m"; + +// A handmade floating-point number f * pow(2, e). +class fp { + private: + typedef uint64_t significand_type; + + // All sizes are in bits. + static FMT_CONSTEXPR_DECL const int char_size = + std::numeric_limits<unsigned char>::digits; + // Subtract 1 to account for an implicit most significant bit in the + // normalized form. + static FMT_CONSTEXPR_DECL const int double_significand_size = + std::numeric_limits<double>::digits - 1; + static FMT_CONSTEXPR_DECL const uint64_t implicit_bit = + 1ull << double_significand_size; + + public: + significand_type f; + int e; + + static FMT_CONSTEXPR_DECL const int significand_size = + sizeof(significand_type) * char_size; + + fp(): f(0), e(0) {} + fp(uint64_t f_val, int e_val): f(f_val), e(e_val) {} + + // Constructs fp from an IEEE754 double. It is a template to prevent compile + // errors on platforms where double is not IEEE754. + template <typename Double> + explicit fp(Double d) { + // Assume double is in the format [sign][exponent][significand]. + typedef std::numeric_limits<Double> limits; + const int double_size = static_cast<int>(sizeof(Double) * char_size); + const int exponent_size = + double_size - double_significand_size - 1; // -1 for sign + const uint64_t significand_mask = implicit_bit - 1; + const uint64_t exponent_mask = (~0ull >> 1) & ~significand_mask; + const int exponent_bias = (1 << exponent_size) - limits::max_exponent - 1; + auto u = bit_cast<uint64_t>(d); + auto biased_e = (u & exponent_mask) >> double_significand_size; + f = u & significand_mask; + if (biased_e != 0) + f += implicit_bit; + else + biased_e = 1; // Subnormals use biased exponent 1 (min exponent). + e = static_cast<int>(biased_e - exponent_bias - double_significand_size); + } + + // Normalizes the value converted from double and multiplied by (1 << SHIFT). + template <int SHIFT = 0> + void normalize() { + // Handle subnormals. + auto shifted_implicit_bit = implicit_bit << SHIFT; + while ((f & shifted_implicit_bit) == 0) { + f <<= 1; + --e; + } + // Subtract 1 to account for hidden bit. + auto offset = significand_size - double_significand_size - SHIFT - 1; + f <<= offset; + e -= offset; + } + + // Compute lower and upper boundaries (m^- and m^+ in the Grisu paper), where + // a boundary is a value half way between the number and its predecessor + // (lower) or successor (upper). The upper boundary is normalized and lower + // has the same exponent but may be not normalized. + void compute_boundaries(fp &lower, fp &upper) const { + lower = f == implicit_bit ? + fp((f << 2) - 1, e - 2) : fp((f << 1) - 1, e - 1); + upper = fp((f << 1) + 1, e - 1); + upper.normalize<1>(); // 1 is to account for the exponent shift above. + lower.f <<= lower.e - upper.e; + lower.e = upper.e; + } +}; + +// Returns an fp number representing x - y. Result may not be normalized. +inline fp operator-(fp x, fp y) { + FMT_ASSERT(x.f >= y.f && x.e == y.e, "invalid operands"); + return fp(x.f - y.f, x.e); +} + +// Computes an fp number r with r.f = x.f * y.f / pow(2, 64) rounded to nearest +// with half-up tie breaking, r.e = x.e + y.e + 64. Result may not be normalized. +FMT_API fp operator*(fp x, fp y); + +// Returns cached power (of 10) c_k = c_k.f * pow(2, c_k.e) such that its +// (binary) exponent satisfies min_exponent <= c_k.e <= min_exponent + 3. +FMT_API fp get_cached_power(int min_exponent, int &pow10_exponent); + +FMT_FUNC fp operator*(fp x, fp y) { + // Multiply 32-bit parts of significands. + uint64_t mask = (1ULL << 32) - 1; + uint64_t a = x.f >> 32, b = x.f & mask; + uint64_t c = y.f >> 32, d = y.f & mask; + uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d; + // Compute mid 64-bit of result and round. + uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31); + return fp(ac + (ad >> 32) + (bc >> 32) + (mid >> 32), x.e + y.e + 64); +} + +FMT_FUNC fp get_cached_power(int min_exponent, int &pow10_exponent) { + const double one_over_log2_10 = 0.30102999566398114; // 1 / log2(10) + int index = static_cast<int>(std::ceil( + (min_exponent + fp::significand_size - 1) * one_over_log2_10)); + // Decimal exponent of the first (smallest) cached power of 10. + const int first_dec_exp = -348; + // Difference between 2 consecutive decimal exponents in cached powers of 10. + const int dec_exp_step = 8; + index = (index - first_dec_exp - 1) / dec_exp_step + 1; + pow10_exponent = first_dec_exp + index * dec_exp_step; + return fp(data::POW10_SIGNIFICANDS[index], data::POW10_EXPONENTS[index]); +} + +FMT_FUNC bool grisu2_round( + char *buf, ptrdiff_t &size, size_t max_digits, uint64_t delta, + uint64_t remainder, uint64_t exp, uint64_t diff, int &exp10) { + while (remainder < diff && delta - remainder >= exp && + (remainder + exp < diff || diff - remainder > remainder + exp - diff)) { + --buf[size - 1]; + remainder += exp; + } + if (size > static_cast<ptrdiff_t>(max_digits)) { + --size; + ++exp10; + if (buf[size] >= '5') + return false; + } + return true; +} + +// Generates output using Grisu2 digit-gen algorithm. +FMT_FUNC bool grisu2_gen_digits( + char *buf, ptrdiff_t &size, uint32_t hi, uint64_t lo, int &exp, + uint64_t delta, const fp &one, const fp &diff, size_t max_digits) { + // Generate digits for the most significant part (hi). + while (exp > 0) { + uint32_t digit = 0; + // This optimization by miloyip reduces the number of integer divisions by + // one per iteration. + switch (exp) { + case 10: digit = hi / 1000000000; hi %= 1000000000; break; + case 9: digit = hi / 100000000; hi %= 100000000; break; + case 8: digit = hi / 10000000; hi %= 10000000; break; + case 7: digit = hi / 1000000; hi %= 1000000; break; + case 6: digit = hi / 100000; hi %= 100000; break; + case 5: digit = hi / 10000; hi %= 10000; break; + case 4: digit = hi / 1000; hi %= 1000; break; + case 3: digit = hi / 100; hi %= 100; break; + case 2: digit = hi / 10; hi %= 10; break; + case 1: digit = hi; hi = 0; break; + default: + FMT_ASSERT(false, "invalid number of digits"); + } + if (digit != 0 || size != 0) + buf[size++] = static_cast<char>('0' + digit); + --exp; + uint64_t remainder = (static_cast<uint64_t>(hi) << -one.e) + lo; + if (remainder <= delta || size > static_cast<ptrdiff_t>(max_digits)) { + return grisu2_round( + buf, size, max_digits, delta, remainder, + static_cast<uint64_t>(data::POWERS_OF_10_32[exp]) << -one.e, + diff.f, exp); + } + } + // Generate digits for the least significant part (lo). + for (;;) { + lo *= 10; + delta *= 10; + char digit = static_cast<char>(lo >> -one.e); + if (digit != 0 || size != 0) + buf[size++] = static_cast<char>('0' + digit); + lo &= one.f - 1; + --exp; + if (lo < delta || size > static_cast<ptrdiff_t>(max_digits)) { + return grisu2_round(buf, size, max_digits, delta, lo, one.f, + diff.f * data::POWERS_OF_10_32[-exp], exp); + } + } +} + +#if FMT_CLANG_VERSION +# define FMT_FALLTHROUGH [[clang::fallthrough]]; +#elif FMT_GCC_VERSION >= 700 +# define FMT_FALLTHROUGH [[gnu::fallthrough]]; +#else +# define FMT_FALLTHROUGH +#endif + +struct gen_digits_params { + int num_digits; + bool fixed; + bool upper; + bool trailing_zeros; +}; + +struct prettify_handler { + char *data; + ptrdiff_t size; + buffer &buf; + + explicit prettify_handler(buffer &b, ptrdiff_t n) + : data(b.data()), size(n), buf(b) {} + ~prettify_handler() { + assert(buf.size() >= to_unsigned(size)); + buf.resize(to_unsigned(size)); + } + + template <typename F> + void insert(ptrdiff_t pos, ptrdiff_t n, F f) { + std::memmove(data + pos + n, data + pos, to_unsigned(size - pos)); + f(data + pos); + size += n; + } + + void insert(ptrdiff_t pos, char c) { + std::memmove(data + pos + 1, data + pos, to_unsigned(size - pos)); + data[pos] = c; + ++size; + } + + void append(ptrdiff_t n, char c) { + std::uninitialized_fill_n(data + size, n, c); + size += n; + } + + void append(char c) { data[size++] = c; } + + void remove_trailing(char c) { + while (data[size - 1] == c) --size; + } +}; + +// Writes the exponent exp in the form "[+-]d{2,3}" to buffer. +template <typename Handler> +FMT_FUNC void write_exponent(int exp, Handler &&h) { + FMT_ASSERT(-1000 < exp && exp < 1000, "exponent out of range"); + if (exp < 0) { + h.append('-'); + exp = -exp; + } else { + h.append('+'); + } + if (exp >= 100) { + h.append(static_cast<char>('0' + exp / 100)); + exp %= 100; + const char *d = data::DIGITS + exp * 2; + h.append(d[0]); + h.append(d[1]); + } else { + const char *d = data::DIGITS + exp * 2; + h.append(d[0]); + h.append(d[1]); + } +} + +struct fill { + size_t n; + void operator()(char *buf) const { + buf[0] = '0'; + buf[1] = '.'; + std::uninitialized_fill_n(buf + 2, n, '0'); + } +}; + +// The number is given as v = f * pow(10, exp), where f has size digits. +template <typename Handler> +FMT_FUNC void grisu2_prettify(const gen_digits_params ¶ms, + int size, int exp, Handler &&handler) { + if (!params.fixed) { + // Insert a decimal point after the first digit and add an exponent. + handler.insert(1, '.'); + exp += size - 1; + if (size < params.num_digits) + handler.append(params.num_digits - size, '0'); + handler.append(params.upper ? 'E' : 'e'); + write_exponent(exp, handler); + return; + } + // pow(10, full_exp - 1) <= v <= pow(10, full_exp). + int full_exp = size + exp; + const int exp_threshold = 21; + if (size <= full_exp && full_exp <= exp_threshold) { + // 1234e7 -> 12340000000[.0+] + handler.append(full_exp - size, '0'); + int num_zeros = params.num_digits - full_exp; + if (num_zeros > 0 && params.trailing_zeros) { + handler.append('.'); + handler.append(num_zeros, '0'); + } + } else if (full_exp > 0) { + // 1234e-2 -> 12.34[0+] + handler.insert(full_exp, '.'); + if (!params.trailing_zeros) { + // Remove trailing zeros. + handler.remove_trailing('0'); + } else if (params.num_digits > size) { + // Add trailing zeros. + ptrdiff_t num_zeros = params.num_digits - size; + handler.append(num_zeros, '0'); + } + } else { + // 1234e-6 -> 0.001234 + handler.insert(0, 2 - full_exp, fill{to_unsigned(-full_exp)}); + } +} + +struct char_counter { + ptrdiff_t size; + + template <typename F> + void insert(ptrdiff_t, ptrdiff_t n, F) { size += n; } + void insert(ptrdiff_t, char) { ++size; } + void append(ptrdiff_t n, char) { size += n; } + void append(char) { ++size; } + void remove_trailing(char) {} +}; + +// Converts format specifiers into parameters for digit generation and computes +// output buffer size for a number in the range [pow(10, exp - 1), pow(10, exp) +// or 0 if exp == 1. +FMT_FUNC gen_digits_params process_specs(const core_format_specs &specs, + int exp, buffer &buf) { + auto params = gen_digits_params(); + int num_digits = specs.precision >= 0 ? specs.precision : 6; + switch (specs.type) { + case 'G': + params.upper = true; + FMT_FALLTHROUGH + case '\0': case 'g': + params.trailing_zeros = (specs.flags & HASH_FLAG) != 0; + if (-4 <= exp && exp < num_digits + 1) { + params.fixed = true; + if (!specs.type && params.trailing_zeros && exp >= 0) + num_digits = exp + 1; + } + break; + case 'F': + params.upper = true; + FMT_FALLTHROUGH + case 'f': { + params.fixed = true; + params.trailing_zeros = true; + int adjusted_min_digits = num_digits + exp; + if (adjusted_min_digits > 0) + num_digits = adjusted_min_digits; + break; + } + case 'E': + params.upper = true; + FMT_FALLTHROUGH + case 'e': + ++num_digits; + break; + } + params.num_digits = to_unsigned(num_digits); + char_counter counter{num_digits}; + grisu2_prettify(params, params.num_digits, exp - num_digits, counter); + buf.resize(to_unsigned(counter.size)); + return params; +} + +template <typename Double> +FMT_FUNC typename std::enable_if<sizeof(Double) == sizeof(uint64_t), bool>::type + grisu2_format(Double value, buffer &buf, core_format_specs specs) { + FMT_ASSERT(value >= 0, "value is negative"); + if (value == 0) { + gen_digits_params params = process_specs(specs, 1, buf); + const size_t size = 1; + buf[0] = '0'; + grisu2_prettify(params, size, 0, prettify_handler(buf, size)); + return true; + } + + fp fp_value(value); + fp lower, upper; // w^- and w^+ in the Grisu paper. + fp_value.compute_boundaries(lower, upper); + + // Find a cached power of 10 close to 1 / upper and use it to scale upper. + const int min_exp = -60; // alpha in Grisu. + int cached_exp = 0; // K in Grisu. + auto cached_pow = get_cached_power( // \tilde{c}_{-k} in Grisu. + min_exp - (upper.e + fp::significand_size), cached_exp); + cached_exp = -cached_exp; + upper = upper * cached_pow; // \tilde{M}^+ in Grisu. + --upper.f; // \tilde{M}^+ - 1 ulp -> M^+_{\downarrow}. + fp one(1ull << -upper.e, upper.e); + // hi (p1 in Grisu) contains the most significant digits of scaled_upper. + // hi = floor(upper / one). + uint32_t hi = static_cast<uint32_t>(upper.f >> -one.e); + int exp = static_cast<int>(count_digits(hi)); // kappa in Grisu. + gen_digits_params params = process_specs(specs, cached_exp + exp, buf); + fp_value.normalize(); + fp scaled_value = fp_value * cached_pow; + lower = lower * cached_pow; // \tilde{M}^- in Grisu. + ++lower.f; // \tilde{M}^- + 1 ulp -> M^-_{\uparrow}. + uint64_t delta = upper.f - lower.f; + fp diff = upper - scaled_value; // wp_w in Grisu. + // lo (p2 in Grisu) contains the least significants digits of scaled_upper. + // lo = supper % one. + uint64_t lo = upper.f & (one.f - 1); + ptrdiff_t size = 0; + if (!grisu2_gen_digits(buf.data(), size, hi, lo, exp, delta, one, diff, + params.num_digits)) { + buf.clear(); + return false; + } + grisu2_prettify(params, size, cached_exp + exp, prettify_handler(buf, size)); + return true; +} + +template <typename Double> +void sprintf_format(Double value, internal::buffer &buf, + core_format_specs spec) { + // Buffer capacity must be non-zero, otherwise MSVC's vsnprintf_s will fail. + FMT_ASSERT(buf.capacity() != 0, "empty buffer"); + + // Build format string. + enum { MAX_FORMAT_SIZE = 10}; // longest format: %#-*.*Lg + char format[MAX_FORMAT_SIZE]; + char *format_ptr = format; + *format_ptr++ = '%'; + if (spec.has(HASH_FLAG)) + *format_ptr++ = '#'; + if (spec.precision >= 0) { + *format_ptr++ = '.'; + *format_ptr++ = '*'; + } + if (std::is_same<Double, long double>::value) + *format_ptr++ = 'L'; + *format_ptr++ = spec.type; + *format_ptr = '\0'; + + // Format using snprintf. + char *start = FMT_NULL; + for (;;) { + std::size_t buffer_size = buf.capacity(); + start = &buf[0]; + int result = internal::char_traits<char>::format_float( + start, buffer_size, format, spec.precision, value); + if (result >= 0) { + unsigned n = internal::to_unsigned(result); + if (n < buf.capacity()) { + buf.resize(n); + break; // The buffer is large enough - continue with formatting. + } + buf.reserve(n + 1); + } else { + // If result is negative we ask to increase the capacity by at least 1, + // but as std::vector, the buffer grows exponentially. + buf.reserve(buf.capacity() + 1); + } + } +} +} // namespace internal + +#if FMT_USE_WINDOWS_H + +FMT_FUNC internal::utf8_to_utf16::utf8_to_utf16(string_view s) { + static const char ERROR_MSG[] = "cannot convert string from UTF-8 to UTF-16"; + if (s.size() > INT_MAX) + FMT_THROW(windows_error(ERROR_INVALID_PARAMETER, ERROR_MSG)); + int s_size = static_cast<int>(s.size()); + if (s_size == 0) { + // MultiByteToWideChar does not support zero length, handle separately. + buffer_.resize(1); + buffer_[0] = 0; + return; + } + + int length = MultiByteToWideChar( + CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, FMT_NULL, 0); + if (length == 0) + FMT_THROW(windows_error(GetLastError(), ERROR_MSG)); + buffer_.resize(length + 1); + length = MultiByteToWideChar( + CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, &buffer_[0], length); + if (length == 0) + FMT_THROW(windows_error(GetLastError(), ERROR_MSG)); + buffer_[length] = 0; +} + +FMT_FUNC internal::utf16_to_utf8::utf16_to_utf8(wstring_view s) { + if (int error_code = convert(s)) { + FMT_THROW(windows_error(error_code, + "cannot convert string from UTF-16 to UTF-8")); + } +} + +FMT_FUNC int internal::utf16_to_utf8::convert(wstring_view s) { + if (s.size() > INT_MAX) + return ERROR_INVALID_PARAMETER; + int s_size = static_cast<int>(s.size()); + if (s_size == 0) { + // WideCharToMultiByte does not support zero length, handle separately. + buffer_.resize(1); + buffer_[0] = 0; + return 0; + } + + int length = WideCharToMultiByte( + CP_UTF8, 0, s.data(), s_size, FMT_NULL, 0, FMT_NULL, FMT_NULL); + if (length == 0) + return GetLastError(); + buffer_.resize(length + 1); + length = WideCharToMultiByte( + CP_UTF8, 0, s.data(), s_size, &buffer_[0], length, FMT_NULL, FMT_NULL); + if (length == 0) + return GetLastError(); + buffer_[length] = 0; + return 0; +} + +FMT_FUNC void windows_error::init( + int err_code, string_view format_str, format_args args) { + error_code_ = err_code; + memory_buffer buffer; + internal::format_windows_error(buffer, err_code, vformat(format_str, args)); + std::runtime_error &base = *this; + base = std::runtime_error(to_string(buffer)); +} + +FMT_FUNC void internal::format_windows_error( + internal::buffer &out, int error_code, string_view message) FMT_NOEXCEPT { + FMT_TRY { + wmemory_buffer buf; + buf.resize(inline_buffer_size); + for (;;) { + wchar_t *system_message = &buf[0]; + int result = FormatMessageW( + FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, + FMT_NULL, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + system_message, static_cast<uint32_t>(buf.size()), FMT_NULL); + if (result != 0) { + utf16_to_utf8 utf8_message; + if (utf8_message.convert(system_message) == ERROR_SUCCESS) { + writer w(out); + w.write(message); + w.write(": "); + w.write(utf8_message); + return; + } + break; + } + if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) + break; // Can't get error message, report error code instead. + buf.resize(buf.size() * 2); + } + } FMT_CATCH(...) {} + format_error_code(out, error_code, message); +} + +#endif // FMT_USE_WINDOWS_H + +FMT_FUNC void format_system_error( + internal::buffer &out, int error_code, string_view message) FMT_NOEXCEPT { + FMT_TRY { + memory_buffer buf; + buf.resize(inline_buffer_size); + for (;;) { + char *system_message = &buf[0]; + int result = safe_strerror(error_code, system_message, buf.size()); + if (result == 0) { + writer w(out); + w.write(message); + w.write(": "); + w.write(system_message); + return; + } + if (result != ERANGE) + break; // Can't get error message, report error code instead. + buf.resize(buf.size() * 2); + } + } FMT_CATCH(...) {} + format_error_code(out, error_code, message); +} + +FMT_FUNC void internal::error_handler::on_error(const char *message) { + FMT_THROW(format_error(message)); +} + +FMT_FUNC void report_system_error( + int error_code, fmt::string_view message) FMT_NOEXCEPT { + report_error(format_system_error, error_code, message); +} + +#if FMT_USE_WINDOWS_H +FMT_FUNC void report_windows_error( + int error_code, fmt::string_view message) FMT_NOEXCEPT { + report_error(internal::format_windows_error, error_code, message); +} +#endif + +FMT_FUNC void vprint(std::FILE *f, string_view format_str, format_args args) { + memory_buffer buffer; + internal::vformat_to(buffer, format_str, + basic_format_args<buffer_context<char>::type>(args)); + std::fwrite(buffer.data(), 1, buffer.size(), f); +} + +FMT_FUNC void vprint(std::FILE *f, wstring_view format_str, wformat_args args) { + wmemory_buffer buffer; + internal::vformat_to(buffer, format_str, args); + std::fwrite(buffer.data(), sizeof(wchar_t), buffer.size(), f); +} + +FMT_FUNC void vprint(string_view format_str, format_args args) { + vprint(stdout, format_str, args); +} + +FMT_FUNC void vprint(wstring_view format_str, wformat_args args) { + vprint(stdout, format_str, args); +} + +FMT_END_NAMESPACE + +#ifdef _MSC_VER +# pragma warning(pop) +#endif + +#endif // FMT_FORMAT_INL_H_ diff --git a/src/seastar/fmt/include/fmt/format.h b/src/seastar/fmt/include/fmt/format.h new file mode 100644 index 00000000..3f4fe90f --- /dev/null +++ b/src/seastar/fmt/include/fmt/format.h @@ -0,0 +1,3714 @@ +/* + Formatting library for C++ + + Copyright (c) 2012 - present, Victor Zverovich + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR + ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef FMT_FORMAT_H_ +#define FMT_FORMAT_H_ + +#include <algorithm> +#include <cassert> +#include <cmath> +#include <cstring> +#include <limits> +#include <memory> +#include <stdexcept> +#include <stdint.h> + +#ifdef __clang__ +# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__) +#else +# define FMT_CLANG_VERSION 0 +#endif + +#ifdef __INTEL_COMPILER +# define FMT_ICC_VERSION __INTEL_COMPILER +#elif defined(__ICL) +# define FMT_ICC_VERSION __ICL +#else +# define FMT_ICC_VERSION 0 +#endif + +#ifdef __NVCC__ +# define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__) +#else +# define FMT_CUDA_VERSION 0 +#endif + +#include "core.h" + +#if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION +# pragma GCC diagnostic push + +// Disable the warning about declaration shadowing because it affects too +// many valid cases. +# pragma GCC diagnostic ignored "-Wshadow" + +// Disable the warning about implicit conversions that may change the sign of +// an integer; silencing it otherwise would require many explicit casts. +# pragma GCC diagnostic ignored "-Wsign-conversion" + +// Disable the warning about nonliteral format strings because we construct +// them dynamically when falling back to snprintf for FP formatting. +# pragma GCC diagnostic ignored "-Wformat-nonliteral" +#endif + +# if FMT_CLANG_VERSION +# pragma GCC diagnostic ignored "-Wgnu-string-literal-operator-template" +# endif + +#ifdef _SECURE_SCL +# define FMT_SECURE_SCL _SECURE_SCL +#else +# define FMT_SECURE_SCL 0 +#endif + +#if FMT_SECURE_SCL +# include <iterator> +#endif + +#ifdef __has_builtin +# define FMT_HAS_BUILTIN(x) __has_builtin(x) +#else +# define FMT_HAS_BUILTIN(x) 0 +#endif + +#ifdef __GNUC_LIBSTD__ +# define FMT_GNUC_LIBSTD_VERSION (__GNUC_LIBSTD__ * 100 + __GNUC_LIBSTD_MINOR__) +#endif + +#ifndef FMT_THROW +# if FMT_EXCEPTIONS +# if FMT_MSC_VER +FMT_BEGIN_NAMESPACE +namespace internal { +template <typename Exception> +inline void do_throw(const Exception &x) { + // Silence unreachable code warnings in MSVC because these are nearly + // impossible to fix in a generic code. + volatile bool b = true; + if (b) + throw x; +} +} +FMT_END_NAMESPACE +# define FMT_THROW(x) fmt::internal::do_throw(x) +# else +# define FMT_THROW(x) throw x +# endif +# else +# define FMT_THROW(x) do { static_cast<void>(sizeof(x)); assert(false); } while(false); +# endif +#endif + +#ifndef FMT_USE_USER_DEFINED_LITERALS +// For Intel's compiler and NVIDIA's compiler both it and the system gcc/msc +// must support UDLs. +# if (FMT_HAS_FEATURE(cxx_user_literals) || \ + FMT_GCC_VERSION >= 407 || FMT_MSC_VER >= 1900) && \ + (!(FMT_ICC_VERSION || FMT_CUDA_VERSION) || \ + FMT_ICC_VERSION >= 1500 || FMT_CUDA_VERSION >= 700) +# define FMT_USE_USER_DEFINED_LITERALS 1 +# else +# define FMT_USE_USER_DEFINED_LITERALS 0 +# endif +#endif + +// EDG C++ Front End based compilers (icc, nvcc) do not currently support UDL +// templates. +#if FMT_USE_USER_DEFINED_LITERALS && \ + FMT_ICC_VERSION == 0 && \ + FMT_CUDA_VERSION == 0 && \ + ((FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L) || \ + (defined(FMT_CLANG_VERSION) && FMT_CLANG_VERSION >= 304)) +# define FMT_UDL_TEMPLATE 1 +#else +# define FMT_UDL_TEMPLATE 0 +#endif + +#ifndef FMT_USE_EXTERN_TEMPLATES +# ifndef FMT_HEADER_ONLY +# define FMT_USE_EXTERN_TEMPLATES \ + ((FMT_CLANG_VERSION >= 209 && __cplusplus >= 201103L) || \ + (FMT_GCC_VERSION >= 303 && FMT_HAS_GXX_CXX11)) +# else +# define FMT_USE_EXTERN_TEMPLATES 0 +# endif +#endif + +#if FMT_HAS_GXX_CXX11 || FMT_HAS_FEATURE(cxx_trailing_return) || \ + FMT_MSC_VER >= 1600 +# define FMT_USE_TRAILING_RETURN 1 +#else +# define FMT_USE_TRAILING_RETURN 0 +#endif + +#ifndef FMT_USE_GRISU +# define FMT_USE_GRISU 0 +//# define FMT_USE_GRISU std::numeric_limits<double>::is_iec559 +#endif + +// __builtin_clz is broken in clang with Microsoft CodeGen: +// https://github.com/fmtlib/fmt/issues/519 +#ifndef _MSC_VER +# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clz) +# define FMT_BUILTIN_CLZ(n) __builtin_clz(n) +# endif + +# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clzll) +# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n) +# endif +#endif + +// Some compilers masquerade as both MSVC and GCC-likes or otherwise support +// __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the +// MSVC intrinsics if the clz and clzll builtins are not available. +#if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) && !defined(_MANAGED) +# include <intrin.h> // _BitScanReverse, _BitScanReverse64 + +FMT_BEGIN_NAMESPACE +namespace internal { +// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning. +# ifndef __clang__ +# pragma intrinsic(_BitScanReverse) +# endif +inline uint32_t clz(uint32_t x) { + unsigned long r = 0; + _BitScanReverse(&r, x); + + assert(x != 0); + // Static analysis complains about using uninitialized data + // "r", but the only way that can happen is if "x" is 0, + // which the callers guarantee to not happen. +# pragma warning(suppress: 6102) + return 31 - r; +} +# define FMT_BUILTIN_CLZ(n) fmt::internal::clz(n) + +# if defined(_WIN64) && !defined(__clang__) +# pragma intrinsic(_BitScanReverse64) +# endif + +inline uint32_t clzll(uint64_t x) { + unsigned long r = 0; +# ifdef _WIN64 + _BitScanReverse64(&r, x); +# else + // Scan the high 32 bits. + if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) + return 63 - (r + 32); + + // Scan the low 32 bits. + _BitScanReverse(&r, static_cast<uint32_t>(x)); +# endif + + assert(x != 0); + // Static analysis complains about using uninitialized data + // "r", but the only way that can happen is if "x" is 0, + // which the callers guarantee to not happen. +# pragma warning(suppress: 6102) + return 63 - r; +} +# define FMT_BUILTIN_CLZLL(n) fmt::internal::clzll(n) +} +FMT_END_NAMESPACE +#endif + +FMT_BEGIN_NAMESPACE +namespace internal { + +// An equivalent of `*reinterpret_cast<Dest*>(&source)` that doesn't produce +// undefined behavior (e.g. due to type aliasing). +// Example: uint64_t d = bit_cast<uint64_t>(2.718); +template <typename Dest, typename Source> +inline Dest bit_cast(const Source& source) { + static_assert(sizeof(Dest) == sizeof(Source), "size mismatch"); + Dest dest; + std::memcpy(&dest, &source, sizeof(dest)); + return dest; +} + +// An implementation of begin and end for pre-C++11 compilers such as gcc 4. +template <typename C> +FMT_CONSTEXPR auto begin(const C &c) -> decltype(c.begin()) { + return c.begin(); +} +template <typename T, std::size_t N> +FMT_CONSTEXPR T *begin(T (&array)[N]) FMT_NOEXCEPT { return array; } +template <typename C> +FMT_CONSTEXPR auto end(const C &c) -> decltype(c.end()) { return c.end(); } +template <typename T, std::size_t N> +FMT_CONSTEXPR T *end(T (&array)[N]) FMT_NOEXCEPT { return array + N; } + +// For std::result_of in gcc 4.4. +template <typename Result> +struct function { + template <typename T> + struct result { typedef Result type; }; +}; + +struct dummy_int { + int data[2]; + operator int() const { return 0; } +}; +typedef std::numeric_limits<internal::dummy_int> fputil; + +// Dummy implementations of system functions called if the latter are not +// available. +inline dummy_int isinf(...) { return dummy_int(); } +inline dummy_int _finite(...) { return dummy_int(); } +inline dummy_int isnan(...) { return dummy_int(); } +inline dummy_int _isnan(...) { return dummy_int(); } + +template <typename Allocator> +typename Allocator::value_type *allocate(Allocator& alloc, std::size_t n) { +#if __cplusplus >= 201103L || FMT_MSC_VER >= 1700 + return std::allocator_traits<Allocator>::allocate(alloc, n); +#else + return alloc.allocate(n); +#endif +} + +// A helper function to suppress bogus "conditional expression is constant" +// warnings. +template <typename T> +inline T const_check(T value) { return value; } +} // namespace internal +FMT_END_NAMESPACE + +namespace std { +// Standard permits specialization of std::numeric_limits. This specialization +// is used to resolve ambiguity between isinf and std::isinf in glibc: +// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48891 +// and the same for isnan. +template <> +class numeric_limits<fmt::internal::dummy_int> : + public std::numeric_limits<int> { + public: + // Portable version of isinf. + template <typename T> + static bool isinfinity(T x) { + using namespace fmt::internal; + // The resolution "priority" is: + // isinf macro > std::isinf > ::isinf > fmt::internal::isinf + if (const_check(sizeof(isinf(x)) != sizeof(fmt::internal::dummy_int))) + return isinf(x) != 0; + return !_finite(static_cast<double>(x)); + } + + // Portable version of isnan. + template <typename T> + static bool isnotanumber(T x) { + using namespace fmt::internal; + if (const_check(sizeof(isnan(x)) != sizeof(fmt::internal::dummy_int))) + return isnan(x) != 0; + return _isnan(static_cast<double>(x)) != 0; + } +}; +} // namespace std + +FMT_BEGIN_NAMESPACE +template <typename Range> +class basic_writer; + +template <typename OutputIt, typename T = typename OutputIt::value_type> +class output_range { + private: + OutputIt it_; + + // Unused yet. + typedef void sentinel; + sentinel end() const; + + public: + typedef OutputIt iterator; + typedef T value_type; + + explicit output_range(OutputIt it): it_(it) {} + OutputIt begin() const { return it_; } +}; + +// A range where begin() returns back_insert_iterator. +template <typename Container> +class back_insert_range: + public output_range<std::back_insert_iterator<Container>> { + typedef output_range<std::back_insert_iterator<Container>> base; + public: + typedef typename Container::value_type value_type; + + back_insert_range(Container &c): base(std::back_inserter(c)) {} + back_insert_range(typename base::iterator it): base(it) {} +}; + +typedef basic_writer<back_insert_range<internal::buffer>> writer; +typedef basic_writer<back_insert_range<internal::wbuffer>> wwriter; + +/** A formatting error such as invalid format string. */ +class format_error : public std::runtime_error { + public: + explicit format_error(const char *message) + : std::runtime_error(message) {} + + explicit format_error(const std::string &message) + : std::runtime_error(message) {} +}; + +namespace internal { + +#if FMT_SECURE_SCL +template <typename T> +struct checked { typedef stdext::checked_array_iterator<T*> type; }; + +// Make a checked iterator to avoid warnings on MSVC. +template <typename T> +inline stdext::checked_array_iterator<T*> make_checked(T *p, std::size_t size) { + return {p, size}; +} +#else +template <typename T> +struct checked { typedef T *type; }; +template <typename T> +inline T *make_checked(T *p, std::size_t) { return p; } +#endif + +template <typename T> +template <typename U> +void basic_buffer<T>::append(const U *begin, const U *end) { + std::size_t new_size = size_ + internal::to_unsigned(end - begin); + reserve(new_size); + std::uninitialized_copy(begin, end, + internal::make_checked(ptr_, capacity_) + size_); + size_ = new_size; +} +} // namespace internal + +// C++20 feature test, since r346892 Clang considers char8_t a fundamental +// type in this mode. If this is the case __cpp_char8_t will be defined. +#if !defined(__cpp_char8_t) +// A UTF-8 code unit type. +enum char8_t: unsigned char {}; +#endif + +// A UTF-8 string view. +class u8string_view : public basic_string_view<char8_t> { + public: + typedef char8_t char_type; + + u8string_view(const char *s): + basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s)) {} + u8string_view(const char *s, size_t count) FMT_NOEXCEPT: + basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s), count) {} +}; + +#if FMT_USE_USER_DEFINED_LITERALS +inline namespace literals { +inline u8string_view operator"" _u(const char *s, std::size_t n) { + return {s, n}; +} +} +#endif + +// The number of characters to store in the basic_memory_buffer object itself +// to avoid dynamic memory allocation. +enum { inline_buffer_size = 500 }; + +/** + \rst + A dynamically growing memory buffer for trivially copyable/constructible types + with the first ``SIZE`` elements stored in the object itself. + + You can use one of the following typedefs for common character types: + + +----------------+------------------------------+ + | Type | Definition | + +================+==============================+ + | memory_buffer | basic_memory_buffer<char> | + +----------------+------------------------------+ + | wmemory_buffer | basic_memory_buffer<wchar_t> | + +----------------+------------------------------+ + + **Example**:: + + fmt::memory_buffer out; + format_to(out, "The answer is {}.", 42); + + This will append the following output to the ``out`` object: + + .. code-block:: none + + The answer is 42. + + The output can be converted to an ``std::string`` with ``to_string(out)``. + \endrst + */ +template <typename T, std::size_t SIZE = inline_buffer_size, + typename Allocator = std::allocator<T> > +class basic_memory_buffer: private Allocator, public internal::basic_buffer<T> { + private: + T store_[SIZE]; + + // Deallocate memory allocated by the buffer. + void deallocate() { + T* data = this->data(); + if (data != store_) Allocator::deallocate(data, this->capacity()); + } + + protected: + void grow(std::size_t size) FMT_OVERRIDE; + + public: + explicit basic_memory_buffer(const Allocator &alloc = Allocator()) + : Allocator(alloc) { + this->set(store_, SIZE); + } + ~basic_memory_buffer() { deallocate(); } + + private: + // Move data from other to this buffer. + void move(basic_memory_buffer &other) { + Allocator &this_alloc = *this, &other_alloc = other; + this_alloc = std::move(other_alloc); + T* data = other.data(); + std::size_t size = other.size(), capacity = other.capacity(); + if (data == other.store_) { + this->set(store_, capacity); + std::uninitialized_copy(other.store_, other.store_ + size, + internal::make_checked(store_, capacity)); + } else { + this->set(data, capacity); + // Set pointer to the inline array so that delete is not called + // when deallocating. + other.set(other.store_, 0); + } + this->resize(size); + } + + public: + /** + \rst + Constructs a :class:`fmt::basic_memory_buffer` object moving the content + of the other object to it. + \endrst + */ + basic_memory_buffer(basic_memory_buffer &&other) { + move(other); + } + + /** + \rst + Moves the content of the other ``basic_memory_buffer`` object to this one. + \endrst + */ + basic_memory_buffer &operator=(basic_memory_buffer &&other) { + assert(this != &other); + deallocate(); + move(other); + return *this; + } + + // Returns a copy of the allocator associated with this buffer. + Allocator get_allocator() const { return *this; } +}; + +template <typename T, std::size_t SIZE, typename Allocator> +void basic_memory_buffer<T, SIZE, Allocator>::grow(std::size_t size) { + std::size_t old_capacity = this->capacity(); + std::size_t new_capacity = old_capacity + old_capacity / 2; + if (size > new_capacity) + new_capacity = size; + T *old_data = this->data(); + T *new_data = internal::allocate<Allocator>(*this, new_capacity); + // The following code doesn't throw, so the raw pointer above doesn't leak. + std::uninitialized_copy(old_data, old_data + this->size(), + internal::make_checked(new_data, new_capacity)); + this->set(new_data, new_capacity); + // deallocate must not throw according to the standard, but even if it does, + // the buffer already uses the new storage and will deallocate it in + // destructor. + if (old_data != store_) + Allocator::deallocate(old_data, old_capacity); +} + +typedef basic_memory_buffer<char> memory_buffer; +typedef basic_memory_buffer<wchar_t> wmemory_buffer; + +namespace internal { + +template <typename Char> +struct char_traits; + +template <> +struct char_traits<char> { + // Formats a floating-point number. + template <typename T> + FMT_API static int format_float(char *buffer, std::size_t size, + const char *format, int precision, T value); +}; + +template <> +struct char_traits<wchar_t> { + template <typename T> + FMT_API static int format_float(wchar_t *buffer, std::size_t size, + const wchar_t *format, int precision, T value); +}; + +#if FMT_USE_EXTERN_TEMPLATES +extern template int char_traits<char>::format_float<double>( + char *buffer, std::size_t size, const char* format, int precision, + double value); +extern template int char_traits<char>::format_float<long double>( + char *buffer, std::size_t size, const char* format, int precision, + long double value); + +extern template int char_traits<wchar_t>::format_float<double>( + wchar_t *buffer, std::size_t size, const wchar_t* format, int precision, + double value); +extern template int char_traits<wchar_t>::format_float<long double>( + wchar_t *buffer, std::size_t size, const wchar_t* format, int precision, + long double value); +#endif + +template <typename Container> +inline typename std::enable_if< + is_contiguous<Container>::value, + typename checked<typename Container::value_type>::type>::type + reserve(std::back_insert_iterator<Container> &it, std::size_t n) { + Container &c = internal::get_container(it); + std::size_t size = c.size(); + c.resize(size + n); + return make_checked(&c[size], n); +} + +template <typename Iterator> +inline Iterator &reserve(Iterator &it, std::size_t) { return it; } + +template <typename Char> +class null_terminating_iterator; + +template <typename Char> +FMT_CONSTEXPR_DECL const Char *pointer_from(null_terminating_iterator<Char> it); + +// An iterator that produces a null terminator on *end. This simplifies parsing +// and allows comparing the performance of processing a null-terminated string +// vs string_view. +template <typename Char> +class null_terminating_iterator { + public: + typedef std::ptrdiff_t difference_type; + typedef Char value_type; + typedef const Char* pointer; + typedef const Char& reference; + typedef std::random_access_iterator_tag iterator_category; + + null_terminating_iterator() : ptr_(0), end_(0) {} + + FMT_CONSTEXPR null_terminating_iterator(const Char *ptr, const Char *end) + : ptr_(ptr), end_(end) {} + + template <typename Range> + FMT_CONSTEXPR explicit null_terminating_iterator(const Range &r) + : ptr_(r.begin()), end_(r.end()) {} + + FMT_CONSTEXPR null_terminating_iterator &operator=(const Char *ptr) { + assert(ptr <= end_); + ptr_ = ptr; + return *this; + } + + FMT_CONSTEXPR Char operator*() const { + return ptr_ != end_ ? *ptr_ : Char(); + } + + FMT_CONSTEXPR null_terminating_iterator operator++() { + ++ptr_; + return *this; + } + + FMT_CONSTEXPR null_terminating_iterator operator++(int) { + null_terminating_iterator result(*this); + ++ptr_; + return result; + } + + FMT_CONSTEXPR null_terminating_iterator operator--() { + --ptr_; + return *this; + } + + FMT_CONSTEXPR null_terminating_iterator operator+(difference_type n) { + return null_terminating_iterator(ptr_ + n, end_); + } + + FMT_CONSTEXPR null_terminating_iterator operator-(difference_type n) { + return null_terminating_iterator(ptr_ - n, end_); + } + + FMT_CONSTEXPR null_terminating_iterator operator+=(difference_type n) { + ptr_ += n; + return *this; + } + + FMT_CONSTEXPR difference_type operator-( + null_terminating_iterator other) const { + return ptr_ - other.ptr_; + } + + FMT_CONSTEXPR bool operator!=(null_terminating_iterator other) const { + return ptr_ != other.ptr_; + } + + bool operator>=(null_terminating_iterator other) const { + return ptr_ >= other.ptr_; + } + + // This should be a friend specialization pointer_from<Char> but the latter + // doesn't compile by gcc 5.1 due to a compiler bug. + template <typename CharT> + friend FMT_CONSTEXPR_DECL const CharT *pointer_from( + null_terminating_iterator<CharT> it); + + private: + const Char *ptr_; + const Char *end_; +}; + +template <typename T> +FMT_CONSTEXPR const T *pointer_from(const T *p) { return p; } + +template <typename Char> +FMT_CONSTEXPR const Char *pointer_from(null_terminating_iterator<Char> it) { + return it.ptr_; +} + +// An output iterator that counts the number of objects written to it and +// discards them. +template <typename T> +class counting_iterator { + private: + std::size_t count_; + mutable T blackhole_; + + public: + typedef std::output_iterator_tag iterator_category; + typedef T value_type; + typedef std::ptrdiff_t difference_type; + typedef T* pointer; + typedef T& reference; + typedef counting_iterator _Unchecked_type; // Mark iterator as checked. + + counting_iterator(): count_(0) {} + + std::size_t count() const { return count_; } + + counting_iterator& operator++() { + ++count_; + return *this; + } + + counting_iterator operator++(int) { + auto it = *this; + ++*this; + return it; + } + + T &operator*() const { return blackhole_; } +}; + +template <typename OutputIt> +class truncating_iterator_base { + protected: + OutputIt out_; + std::size_t limit_; + std::size_t count_; + + truncating_iterator_base(OutputIt out, std::size_t limit) + : out_(out), limit_(limit), count_(0) {} + + public: + typedef std::output_iterator_tag iterator_category; + typedef void difference_type; + typedef void pointer; + typedef void reference; + typedef truncating_iterator_base _Unchecked_type; // Mark iterator as checked. + + OutputIt base() const { return out_; } + std::size_t count() const { return count_; } +}; + +// An output iterator that truncates the output and counts the number of objects +// written to it. +template <typename OutputIt, typename Enable = typename std::is_void< + typename std::iterator_traits<OutputIt>::value_type>::type> +class truncating_iterator; + +template <typename OutputIt> +class truncating_iterator<OutputIt, std::false_type>: + public truncating_iterator_base<OutputIt> { + typedef std::iterator_traits<OutputIt> traits; + + mutable typename traits::value_type blackhole_; + + public: + typedef typename traits::value_type value_type; + + truncating_iterator(OutputIt out, std::size_t limit) + : truncating_iterator_base<OutputIt>(out, limit) {} + + truncating_iterator& operator++() { + if (this->count_++ < this->limit_) + ++this->out_; + return *this; + } + + truncating_iterator operator++(int) { + auto it = *this; + ++*this; + return it; + } + + value_type& operator*() const { + return this->count_ < this->limit_ ? *this->out_ : blackhole_; + } +}; + +template <typename OutputIt> +class truncating_iterator<OutputIt, std::true_type>: + public truncating_iterator_base<OutputIt> { + public: + typedef typename OutputIt::container_type::value_type value_type; + + truncating_iterator(OutputIt out, std::size_t limit) + : truncating_iterator_base<OutputIt>(out, limit) {} + + truncating_iterator& operator=(value_type val) { + if (this->count_++ < this->limit_) + this->out_ = val; + return *this; + } + + truncating_iterator& operator++() { return *this; } + truncating_iterator& operator++(int) { return *this; } + truncating_iterator& operator*() { return *this; } +}; + +// Returns true if value is negative, false otherwise. +// Same as (value < 0) but doesn't produce warnings if T is an unsigned type. +template <typename T> +FMT_CONSTEXPR typename std::enable_if< + std::numeric_limits<T>::is_signed, bool>::type is_negative(T value) { + return value < 0; +} +template <typename T> +FMT_CONSTEXPR typename std::enable_if< + !std::numeric_limits<T>::is_signed, bool>::type is_negative(T) { + return false; +} + +template <typename T> +struct int_traits { + // Smallest of uint32_t and uint64_t that is large enough to represent + // all values of T. + typedef typename std::conditional< + std::numeric_limits<T>::digits <= 32, uint32_t, uint64_t>::type main_type; +}; + +// Static data is placed in this class template to allow header-only +// configuration. +template <typename T = void> +struct FMT_API basic_data { + static const uint32_t POWERS_OF_10_32[]; + static const uint32_t ZERO_OR_POWERS_OF_10_32[]; + static const uint64_t ZERO_OR_POWERS_OF_10_64[]; + static const uint64_t POW10_SIGNIFICANDS[]; + static const int16_t POW10_EXPONENTS[]; + static const char DIGITS[]; + static const char FOREGROUND_COLOR[]; + static const char BACKGROUND_COLOR[]; + static const char RESET_COLOR[]; + static const wchar_t WRESET_COLOR[]; +}; + +#if FMT_USE_EXTERN_TEMPLATES +extern template struct basic_data<void>; +#endif + +typedef basic_data<> data; + +#ifdef FMT_BUILTIN_CLZLL +// Returns the number of decimal digits in n. Leading zeros are not counted +// except for n == 0 in which case count_digits returns 1. +inline unsigned count_digits(uint64_t n) { + // Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10 + // and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits. + int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12; + return to_unsigned(t) - (n < data::ZERO_OR_POWERS_OF_10_64[t]) + 1; +} +#else +// Fallback version of count_digits used when __builtin_clz is not available. +inline unsigned count_digits(uint64_t n) { + unsigned count = 1; + for (;;) { + // Integer division is slow so do it for a group of four digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + if (n < 10) return count; + if (n < 100) return count + 1; + if (n < 1000) return count + 2; + if (n < 10000) return count + 3; + n /= 10000u; + count += 4; + } +} +#endif + +template <typename Char> +inline size_t count_code_points(basic_string_view<Char> s) { return s.size(); } + +// Counts the number of code points in a UTF-8 string. +FMT_API size_t count_code_points(basic_string_view<char8_t> s); + +inline char8_t to_char8_t(char c) { return static_cast<char8_t>(c); } + +template <typename InputIt, typename OutChar> +struct needs_conversion: std::integral_constant<bool, + std::is_same< + typename std::iterator_traits<InputIt>::value_type, char>::value && + std::is_same<OutChar, char8_t>::value> {}; + +template <typename OutChar, typename InputIt, typename OutputIt> +typename std::enable_if< + !needs_conversion<InputIt, OutChar>::value, OutputIt>::type + copy_str(InputIt begin, InputIt end, OutputIt it) { + return std::copy(begin, end, it); +} + +template <typename OutChar, typename InputIt, typename OutputIt> +typename std::enable_if< + needs_conversion<InputIt, OutChar>::value, OutputIt>::type + copy_str(InputIt begin, InputIt end, OutputIt it) { + return std::transform(begin, end, it, to_char8_t); +} + +#if FMT_HAS_CPP_ATTRIBUTE(always_inline) +# define FMT_ALWAYS_INLINE __attribute__((always_inline)) +#else +# define FMT_ALWAYS_INLINE +#endif + +template <typename Handler> +inline char *lg(uint32_t n, Handler h) FMT_ALWAYS_INLINE; + +// Computes g = floor(log10(n)) and calls h.on<g>(n); +template <typename Handler> +inline char *lg(uint32_t n, Handler h) { + return n < 100 ? n < 10 ? h.template on<0>(n) : h.template on<1>(n) + : n < 1000000 + ? n < 10000 ? n < 1000 ? h.template on<2>(n) + : h.template on<3>(n) + : n < 100000 ? h.template on<4>(n) + : h.template on<5>(n) + : n < 100000000 ? n < 10000000 ? h.template on<6>(n) + : h.template on<7>(n) + : n < 1000000000 ? h.template on<8>(n) + : h.template on<9>(n); +} + +// An lg handler that formats a decimal number. +// Usage: lg(n, decimal_formatter(buffer)); +class decimal_formatter { + private: + char *buffer_; + + void write_pair(unsigned N, uint32_t index) { + std::memcpy(buffer_ + N, data::DIGITS + index * 2, 2); + } + + public: + explicit decimal_formatter(char *buf) : buffer_(buf) {} + + template <unsigned N> char *on(uint32_t u) { + if (N == 0) { + *buffer_ = static_cast<char>(u) + '0'; + } else if (N == 1) { + write_pair(0, u); + } else { + // The idea of using 4.32 fixed-point numbers is based on + // https://github.com/jeaiii/itoa + unsigned n = N - 1; + unsigned a = n / 5 * n * 53 / 16; + uint64_t t = ((1ULL << (32 + a)) / + data::ZERO_OR_POWERS_OF_10_32[n] + 1 - n / 9); + t = ((t * u) >> a) + n / 5 * 4; + write_pair(0, t >> 32); + for (unsigned i = 2; i < N; i += 2) { + t = 100ULL * static_cast<uint32_t>(t); + write_pair(i, t >> 32); + } + if (N % 2 == 0) { + buffer_[N] = static_cast<char>( + (10ULL * static_cast<uint32_t>(t)) >> 32) + '0'; + } + } + return buffer_ += N + 1; + } +}; + +// An lg handler that formats a decimal number with a terminating null. +class decimal_formatter_null : public decimal_formatter { + public: + explicit decimal_formatter_null(char *buf) : decimal_formatter(buf) {} + + template <unsigned N> char *on(uint32_t u) { + char *buf = decimal_formatter::on<N>(u); + *buf = '\0'; + return buf; + } +}; + +#ifdef FMT_BUILTIN_CLZ +// Optional version of count_digits for better performance on 32-bit platforms. +inline unsigned count_digits(uint32_t n) { + int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12; + return to_unsigned(t) - (n < data::ZERO_OR_POWERS_OF_10_32[t]) + 1; +} +#endif + +// A functor that doesn't add a thousands separator. +struct no_thousands_sep { + typedef char char_type; + + template <typename Char> + void operator()(Char *) {} + + enum { size = 0 }; +}; + +// A functor that adds a thousands separator. +template <typename Char> +class add_thousands_sep { + private: + basic_string_view<Char> sep_; + + // Index of a decimal digit with the least significant digit having index 0. + unsigned digit_index_; + + public: + typedef Char char_type; + + explicit add_thousands_sep(basic_string_view<Char> sep) + : sep_(sep), digit_index_(0) {} + + void operator()(Char *&buffer) { + if (++digit_index_ % 3 != 0) + return; + buffer -= sep_.size(); + std::uninitialized_copy(sep_.data(), sep_.data() + sep_.size(), + internal::make_checked(buffer, sep_.size())); + } + + enum { size = 1 }; +}; + +template <typename Char> +FMT_API Char thousands_sep_impl(locale_ref loc); + +template <typename Char> +inline Char thousands_sep(locale_ref loc) { + return Char(thousands_sep_impl<char>(loc)); +} + +template <> +inline wchar_t thousands_sep(locale_ref loc) { + return thousands_sep_impl<wchar_t>(loc); +} + +// Formats a decimal unsigned integer value writing into buffer. +// thousands_sep is a functor that is called after writing each char to +// add a thousands separator if necessary. +template <typename UInt, typename Char, typename ThousandsSep> +inline Char *format_decimal(Char *buffer, UInt value, unsigned num_digits, + ThousandsSep thousands_sep) { + buffer += num_digits; + Char *end = buffer; + while (value >= 100) { + // Integer division is slow so do it for a group of two digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + unsigned index = static_cast<unsigned>((value % 100) * 2); + value /= 100; + *--buffer = static_cast<Char>(data::DIGITS[index + 1]); + thousands_sep(buffer); + *--buffer = static_cast<Char>(data::DIGITS[index]); + thousands_sep(buffer); + } + if (value < 10) { + *--buffer = static_cast<Char>('0' + value); + return end; + } + unsigned index = static_cast<unsigned>(value * 2); + *--buffer = static_cast<Char>(data::DIGITS[index + 1]); + thousands_sep(buffer); + *--buffer = static_cast<Char>(data::DIGITS[index]); + return end; +} + +template <typename OutChar, typename UInt, typename Iterator, + typename ThousandsSep> +inline Iterator format_decimal( + Iterator out, UInt value, unsigned num_digits, ThousandsSep sep) { + typedef typename ThousandsSep::char_type char_type; + // Buffer should be large enough to hold all digits (<= digits10 + 1). + enum { max_size = std::numeric_limits<UInt>::digits10 + 1 }; + FMT_ASSERT(ThousandsSep::size <= 1, "invalid separator"); + char_type buffer[max_size + max_size / 3]; + auto end = format_decimal(buffer, value, num_digits, sep); + return internal::copy_str<OutChar>(buffer, end, out); +} + +template <typename OutChar, typename It, typename UInt> +inline It format_decimal(It out, UInt value, unsigned num_digits) { + return format_decimal<OutChar>(out, value, num_digits, no_thousands_sep()); +} + +template <unsigned BASE_BITS, typename Char, typename UInt> +inline Char *format_uint(Char *buffer, UInt value, unsigned num_digits, + bool upper = false) { + buffer += num_digits; + Char *end = buffer; + do { + const char *digits = upper ? "0123456789ABCDEF" : "0123456789abcdef"; + unsigned digit = (value & ((1 << BASE_BITS) - 1)); + *--buffer = static_cast<Char>(BASE_BITS < 4 ? '0' + digit : digits[digit]); + } while ((value >>= BASE_BITS) != 0); + return end; +} + +template <unsigned BASE_BITS, typename Char, typename It, typename UInt> +inline It format_uint(It out, UInt value, unsigned num_digits, + bool upper = false) { + // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1) + // and null. + char buffer[std::numeric_limits<UInt>::digits / BASE_BITS + 2]; + format_uint<BASE_BITS>(buffer, value, num_digits, upper); + return internal::copy_str<Char>(buffer, buffer + num_digits, out); +} + +#ifndef _WIN32 +# define FMT_USE_WINDOWS_H 0 +#elif !defined(FMT_USE_WINDOWS_H) +# define FMT_USE_WINDOWS_H 1 +#endif + +// Define FMT_USE_WINDOWS_H to 0 to disable use of windows.h. +// All the functionality that relies on it will be disabled too. +#if FMT_USE_WINDOWS_H +// A converter from UTF-8 to UTF-16. +// It is only provided for Windows since other systems support UTF-8 natively. +class utf8_to_utf16 { + private: + wmemory_buffer buffer_; + + public: + FMT_API explicit utf8_to_utf16(string_view s); + operator wstring_view() const { return wstring_view(&buffer_[0], size()); } + size_t size() const { return buffer_.size() - 1; } + const wchar_t *c_str() const { return &buffer_[0]; } + std::wstring str() const { return std::wstring(&buffer_[0], size()); } +}; + +// A converter from UTF-16 to UTF-8. +// It is only provided for Windows since other systems support UTF-8 natively. +class utf16_to_utf8 { + private: + memory_buffer buffer_; + + public: + utf16_to_utf8() {} + FMT_API explicit utf16_to_utf8(wstring_view s); + operator string_view() const { return string_view(&buffer_[0], size()); } + size_t size() const { return buffer_.size() - 1; } + const char *c_str() const { return &buffer_[0]; } + std::string str() const { return std::string(&buffer_[0], size()); } + + // Performs conversion returning a system error code instead of + // throwing exception on conversion error. This method may still throw + // in case of memory allocation error. + FMT_API int convert(wstring_view s); +}; + +FMT_API void format_windows_error(fmt::internal::buffer &out, int error_code, + fmt::string_view message) FMT_NOEXCEPT; +#endif + +template <typename T = void> +struct null {}; +} // namespace internal + +enum alignment { + ALIGN_DEFAULT, ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER, ALIGN_NUMERIC +}; + +// Flags. +enum { SIGN_FLAG = 1, PLUS_FLAG = 2, MINUS_FLAG = 4, HASH_FLAG = 8 }; + +// An alignment specifier. +struct align_spec { + unsigned width_; + // Fill is always wchar_t and cast to char if necessary to avoid having + // two specialization of AlignSpec and its subclasses. + wchar_t fill_; + alignment align_; + + FMT_CONSTEXPR align_spec() : width_(0), fill_(' '), align_(ALIGN_DEFAULT) {} + FMT_CONSTEXPR unsigned width() const { return width_; } + FMT_CONSTEXPR wchar_t fill() const { return fill_; } + FMT_CONSTEXPR alignment align() const { return align_; } +}; + +struct core_format_specs { + int precision; + uint_least8_t flags; + char type; + + FMT_CONSTEXPR core_format_specs() : precision(-1), flags(0), type(0) {} + FMT_CONSTEXPR bool has(unsigned f) const { return (flags & f) != 0; } +}; + +// Format specifiers. +template <typename Char> +struct basic_format_specs : align_spec, core_format_specs { + FMT_CONSTEXPR basic_format_specs() {} +}; + +typedef basic_format_specs<char> format_specs; + +template <typename Char, typename ErrorHandler> +FMT_CONSTEXPR unsigned basic_parse_context<Char, ErrorHandler>::next_arg_id() { + if (next_arg_id_ >= 0) + return internal::to_unsigned(next_arg_id_++); + on_error("cannot switch from manual to automatic argument indexing"); + return 0; +} + +namespace internal { + +// Formats value using Grisu2 algorithm: +// https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf +template <typename Double> +FMT_API typename std::enable_if<sizeof(Double) == sizeof(uint64_t), bool>::type + grisu2_format(Double value, buffer &buf, core_format_specs); +template <typename Double> +inline typename std::enable_if<sizeof(Double) != sizeof(uint64_t), bool>::type + grisu2_format(Double, buffer &, core_format_specs) { return false; } + +template <typename Double> +void sprintf_format(Double, internal::buffer &, core_format_specs); + +template <typename Handler> +FMT_CONSTEXPR void handle_int_type_spec(char spec, Handler &&handler) { + switch (spec) { + case 0: case 'd': + handler.on_dec(); + break; + case 'x': case 'X': + handler.on_hex(); + break; + case 'b': case 'B': + handler.on_bin(); + break; + case 'o': + handler.on_oct(); + break; + case 'n': + handler.on_num(); + break; + default: + handler.on_error(); + } +} + +template <typename Handler> +FMT_CONSTEXPR void handle_float_type_spec(char spec, Handler &&handler) { + switch (spec) { + case 0: case 'g': case 'G': + handler.on_general(); + break; + case 'e': case 'E': + handler.on_exp(); + break; + case 'f': case 'F': + handler.on_fixed(); + break; + case 'a': case 'A': + handler.on_hex(); + break; + default: + handler.on_error(); + break; + } +} + +template <typename Char, typename Handler> +FMT_CONSTEXPR void handle_char_specs( + const basic_format_specs<Char> *specs, Handler &&handler) { + if (!specs) return handler.on_char(); + if (specs->type && specs->type != 'c') return handler.on_int(); + if (specs->align() == ALIGN_NUMERIC || specs->flags != 0) + handler.on_error("invalid format specifier for char"); + handler.on_char(); +} + +template <typename Char, typename Handler> +FMT_CONSTEXPR void handle_cstring_type_spec(Char spec, Handler &&handler) { + if (spec == 0 || spec == 's') + handler.on_string(); + else if (spec == 'p') + handler.on_pointer(); + else + handler.on_error("invalid type specifier"); +} + +template <typename Char, typename ErrorHandler> +FMT_CONSTEXPR void check_string_type_spec(Char spec, ErrorHandler &&eh) { + if (spec != 0 && spec != 's') + eh.on_error("invalid type specifier"); +} + +template <typename Char, typename ErrorHandler> +FMT_CONSTEXPR void check_pointer_type_spec(Char spec, ErrorHandler &&eh) { + if (spec != 0 && spec != 'p') + eh.on_error("invalid type specifier"); +} + +template <typename ErrorHandler> +class int_type_checker : private ErrorHandler { + public: + FMT_CONSTEXPR explicit int_type_checker(ErrorHandler eh) : ErrorHandler(eh) {} + + FMT_CONSTEXPR void on_dec() {} + FMT_CONSTEXPR void on_hex() {} + FMT_CONSTEXPR void on_bin() {} + FMT_CONSTEXPR void on_oct() {} + FMT_CONSTEXPR void on_num() {} + + FMT_CONSTEXPR void on_error() { + ErrorHandler::on_error("invalid type specifier"); + } +}; + +template <typename ErrorHandler> +class float_type_checker : private ErrorHandler { + public: + FMT_CONSTEXPR explicit float_type_checker(ErrorHandler eh) + : ErrorHandler(eh) {} + + FMT_CONSTEXPR void on_general() {} + FMT_CONSTEXPR void on_exp() {} + FMT_CONSTEXPR void on_fixed() {} + FMT_CONSTEXPR void on_hex() {} + + FMT_CONSTEXPR void on_error() { + ErrorHandler::on_error("invalid type specifier"); + } +}; + +template <typename ErrorHandler> +class char_specs_checker : public ErrorHandler { + private: + char type_; + + public: + FMT_CONSTEXPR char_specs_checker(char type, ErrorHandler eh) + : ErrorHandler(eh), type_(type) {} + + FMT_CONSTEXPR void on_int() { + handle_int_type_spec(type_, int_type_checker<ErrorHandler>(*this)); + } + FMT_CONSTEXPR void on_char() {} +}; + +template <typename ErrorHandler> +class cstring_type_checker : public ErrorHandler { + public: + FMT_CONSTEXPR explicit cstring_type_checker(ErrorHandler eh) + : ErrorHandler(eh) {} + + FMT_CONSTEXPR void on_string() {} + FMT_CONSTEXPR void on_pointer() {} +}; + +template <typename Context> +void arg_map<Context>::init(const basic_format_args<Context> &args) { + if (map_) + return; + map_ = new entry[args.max_size()]; + if (args.is_packed()) { + for (unsigned i = 0;/*nothing*/; ++i) { + internal::type arg_type = args.type(i); + switch (arg_type) { + case internal::none_type: + return; + case internal::named_arg_type: + push_back(args.values_[i]); + break; + default: + break; // Do nothing. + } + } + } + for (unsigned i = 0; ; ++i) { + switch (args.args_[i].type_) { + case internal::none_type: + return; + case internal::named_arg_type: + push_back(args.args_[i].value_); + break; + default: + break; // Do nothing. + } + } +} + +template <typename Range> +class arg_formatter_base { + public: + typedef typename Range::value_type char_type; + typedef decltype(internal::declval<Range>().begin()) iterator; + typedef basic_format_specs<char_type> format_specs; + + private: + typedef basic_writer<Range> writer_type; + writer_type writer_; + format_specs *specs_; + + struct char_writer { + char_type value; + + size_t size() const { return 1; } + size_t width() const { return 1; } + + template <typename It> + void operator()(It &&it) const { *it++ = value; } + }; + + void write_char(char_type value) { + if (specs_) + writer_.write_padded(*specs_, char_writer{value}); + else + writer_.write(value); + } + + void write_pointer(const void *p) { + format_specs specs = specs_ ? *specs_ : format_specs(); + specs.flags = HASH_FLAG; + specs.type = 'x'; + writer_.write_int(reinterpret_cast<uintptr_t>(p), specs); + } + + protected: + writer_type &writer() { return writer_; } + format_specs *spec() { return specs_; } + iterator out() { return writer_.out(); } + + void write(bool value) { + string_view sv(value ? "true" : "false"); + specs_ ? writer_.write_str(sv, *specs_) : writer_.write(sv); + } + + void write(const char_type *value) { + if (!value) + FMT_THROW(format_error("string pointer is null")); + auto length = std::char_traits<char_type>::length(value); + basic_string_view<char_type> sv(value, length); + specs_ ? writer_.write_str(sv, *specs_) : writer_.write(sv); + } + + public: + arg_formatter_base(Range r, format_specs *s, locale_ref loc) + : writer_(r, loc), specs_(s) {} + + iterator operator()(monostate) { + FMT_ASSERT(false, "invalid argument type"); + return out(); + } + + template <typename T> + typename std::enable_if< + std::is_integral<T>::value || std::is_same<T, char_type>::value, + iterator>::type operator()(T value) { + // MSVC2013 fails to compile separate overloads for bool and char_type so + // use std::is_same instead. + if (std::is_same<T, bool>::value) { + if (specs_ && specs_->type) + return (*this)(value ? 1 : 0); + write(value != 0); + } else if (std::is_same<T, char_type>::value) { + internal::handle_char_specs( + specs_, char_spec_handler(*this, static_cast<char_type>(value))); + } else { + specs_ ? writer_.write_int(value, *specs_) : writer_.write(value); + } + return out(); + } + + template <typename T> + typename std::enable_if<std::is_floating_point<T>::value, iterator>::type + operator()(T value) { + writer_.write_double(value, specs_ ? *specs_ : format_specs()); + return out(); + } + + struct char_spec_handler : internal::error_handler { + arg_formatter_base &formatter; + char_type value; + + char_spec_handler(arg_formatter_base& f, char_type val) + : formatter(f), value(val) {} + + void on_int() { + if (formatter.specs_) + formatter.writer_.write_int(value, *formatter.specs_); + else + formatter.writer_.write(value); + } + void on_char() { formatter.write_char(value); } + }; + + struct cstring_spec_handler : internal::error_handler { + arg_formatter_base &formatter; + const char_type *value; + + cstring_spec_handler(arg_formatter_base &f, const char_type *val) + : formatter(f), value(val) {} + + void on_string() { formatter.write(value); } + void on_pointer() { formatter.write_pointer(value); } + }; + + iterator operator()(const char_type *value) { + if (!specs_) return write(value), out(); + internal::handle_cstring_type_spec( + specs_->type, cstring_spec_handler(*this, value)); + return out(); + } + + iterator operator()(basic_string_view<char_type> value) { + if (specs_) { + internal::check_string_type_spec( + specs_->type, internal::error_handler()); + writer_.write_str(value, *specs_); + } else { + writer_.write(value); + } + return out(); + } + + iterator operator()(const void *value) { + if (specs_) + check_pointer_type_spec(specs_->type, internal::error_handler()); + write_pointer(value); + return out(); + } +}; + +template <typename Char> +FMT_CONSTEXPR bool is_name_start(Char c) { + return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c; +} + +// DEPRECATED: Parses the input as an unsigned integer. This function assumes +// that the first character is a digit and presence of a non-digit character at +// the end. +// it: an iterator pointing to the beginning of the input range. +template <typename Iterator, typename ErrorHandler> +FMT_CONSTEXPR unsigned parse_nonnegative_int(Iterator &it, ErrorHandler &&eh) { + assert('0' <= *it && *it <= '9'); + if (*it == '0') { + ++it; + return 0; + } + unsigned value = 0; + // Convert to unsigned to prevent a warning. + unsigned max_int = (std::numeric_limits<int>::max)(); + unsigned big = max_int / 10; + do { + // Check for overflow. + if (value > big) { + value = max_int + 1; + break; + } + value = value * 10 + unsigned(*it - '0'); + // Workaround for MSVC "setup_exception stack overflow" error: + auto next = it; + ++next; + it = next; + } while ('0' <= *it && *it <= '9'); + if (value > max_int) + eh.on_error("number is too big"); + return value; +} + +// Parses the range [begin, end) as an unsigned integer. This function assumes +// that the range is non-empty and the first character is a digit. +template <typename Char, typename ErrorHandler> +FMT_CONSTEXPR unsigned parse_nonnegative_int( + const Char *&begin, const Char *end, ErrorHandler &&eh) { + assert(begin != end && '0' <= *begin && *begin <= '9'); + if (*begin == '0') { + ++begin; + return 0; + } + unsigned value = 0; + // Convert to unsigned to prevent a warning. + unsigned max_int = (std::numeric_limits<int>::max)(); + unsigned big = max_int / 10; + do { + // Check for overflow. + if (value > big) { + value = max_int + 1; + break; + } + value = value * 10 + unsigned(*begin - '0'); + ++begin; + } while (begin != end && '0' <= *begin && *begin <= '9'); + if (value > max_int) + eh.on_error("number is too big"); + return value; +} + +template <typename Char, typename Context> +class custom_formatter: public function<bool> { + private: + Context &ctx_; + + public: + explicit custom_formatter(Context &ctx): ctx_(ctx) {} + + bool operator()(typename basic_format_arg<Context>::handle h) const { + h.format(ctx_); + return true; + } + + template <typename T> + bool operator()(T) const { return false; } +}; + +template <typename T> +struct is_integer { + enum { + value = std::is_integral<T>::value && !std::is_same<T, bool>::value && + !std::is_same<T, char>::value && !std::is_same<T, wchar_t>::value + }; +}; + +template <typename ErrorHandler> +class width_checker: public function<unsigned long long> { + public: + explicit FMT_CONSTEXPR width_checker(ErrorHandler &eh) : handler_(eh) {} + + template <typename T> + FMT_CONSTEXPR + typename std::enable_if< + is_integer<T>::value, unsigned long long>::type operator()(T value) { + if (is_negative(value)) + handler_.on_error("negative width"); + return static_cast<unsigned long long>(value); + } + + template <typename T> + FMT_CONSTEXPR typename std::enable_if< + !is_integer<T>::value, unsigned long long>::type operator()(T) { + handler_.on_error("width is not integer"); + return 0; + } + + private: + ErrorHandler &handler_; +}; + +template <typename ErrorHandler> +class precision_checker: public function<unsigned long long> { + public: + explicit FMT_CONSTEXPR precision_checker(ErrorHandler &eh) : handler_(eh) {} + + template <typename T> + FMT_CONSTEXPR typename std::enable_if< + is_integer<T>::value, unsigned long long>::type operator()(T value) { + if (is_negative(value)) + handler_.on_error("negative precision"); + return static_cast<unsigned long long>(value); + } + + template <typename T> + FMT_CONSTEXPR typename std::enable_if< + !is_integer<T>::value, unsigned long long>::type operator()(T) { + handler_.on_error("precision is not integer"); + return 0; + } + + private: + ErrorHandler &handler_; +}; + +// A format specifier handler that sets fields in basic_format_specs. +template <typename Char> +class specs_setter { + public: + explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char> &specs): + specs_(specs) {} + + FMT_CONSTEXPR specs_setter(const specs_setter &other): specs_(other.specs_) {} + + FMT_CONSTEXPR void on_align(alignment align) { specs_.align_ = align; } + FMT_CONSTEXPR void on_fill(Char fill) { specs_.fill_ = fill; } + FMT_CONSTEXPR void on_plus() { specs_.flags |= SIGN_FLAG | PLUS_FLAG; } + FMT_CONSTEXPR void on_minus() { specs_.flags |= MINUS_FLAG; } + FMT_CONSTEXPR void on_space() { specs_.flags |= SIGN_FLAG; } + FMT_CONSTEXPR void on_hash() { specs_.flags |= HASH_FLAG; } + + FMT_CONSTEXPR void on_zero() { + specs_.align_ = ALIGN_NUMERIC; + specs_.fill_ = '0'; + } + + FMT_CONSTEXPR void on_width(unsigned width) { specs_.width_ = width; } + FMT_CONSTEXPR void on_precision(unsigned precision) { + specs_.precision = static_cast<int>(precision); + } + FMT_CONSTEXPR void end_precision() {} + + FMT_CONSTEXPR void on_type(Char type) { + specs_.type = static_cast<char>(type); + } + + protected: + basic_format_specs<Char> &specs_; +}; + +// A format specifier handler that checks if specifiers are consistent with the +// argument type. +template <typename Handler> +class specs_checker : public Handler { + public: + FMT_CONSTEXPR specs_checker(const Handler& handler, internal::type arg_type) + : Handler(handler), arg_type_(arg_type) {} + + FMT_CONSTEXPR specs_checker(const specs_checker &other) + : Handler(other), arg_type_(other.arg_type_) {} + + FMT_CONSTEXPR void on_align(alignment align) { + if (align == ALIGN_NUMERIC) + require_numeric_argument(); + Handler::on_align(align); + } + + FMT_CONSTEXPR void on_plus() { + check_sign(); + Handler::on_plus(); + } + + FMT_CONSTEXPR void on_minus() { + check_sign(); + Handler::on_minus(); + } + + FMT_CONSTEXPR void on_space() { + check_sign(); + Handler::on_space(); + } + + FMT_CONSTEXPR void on_hash() { + require_numeric_argument(); + Handler::on_hash(); + } + + FMT_CONSTEXPR void on_zero() { + require_numeric_argument(); + Handler::on_zero(); + } + + FMT_CONSTEXPR void end_precision() { + if (is_integral(arg_type_) || arg_type_ == pointer_type) + this->on_error("precision not allowed for this argument type"); + } + + private: + FMT_CONSTEXPR void require_numeric_argument() { + if (!is_arithmetic(arg_type_)) + this->on_error("format specifier requires numeric argument"); + } + + FMT_CONSTEXPR void check_sign() { + require_numeric_argument(); + if (is_integral(arg_type_) && arg_type_ != int_type && + arg_type_ != long_long_type && arg_type_ != internal::char_type) { + this->on_error("format specifier requires signed argument"); + } + } + + internal::type arg_type_; +}; + +template <template <typename> class Handler, typename T, + typename Context, typename ErrorHandler> +FMT_CONSTEXPR void set_dynamic_spec( + T &value, basic_format_arg<Context> arg, ErrorHandler eh) { + unsigned long long big_value = + visit_format_arg(Handler<ErrorHandler>(eh), arg); + if (big_value > to_unsigned((std::numeric_limits<int>::max)())) + eh.on_error("number is too big"); + value = static_cast<T>(big_value); +} + +struct auto_id {}; + +// The standard format specifier handler with checking. +template <typename Context> +class specs_handler: public specs_setter<typename Context::char_type> { + public: + typedef typename Context::char_type char_type; + + FMT_CONSTEXPR specs_handler( + basic_format_specs<char_type> &specs, Context &ctx) + : specs_setter<char_type>(specs), context_(ctx) {} + + template <typename Id> + FMT_CONSTEXPR void on_dynamic_width(Id arg_id) { + set_dynamic_spec<width_checker>( + this->specs_.width_, get_arg(arg_id), context_.error_handler()); + } + + template <typename Id> + FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) { + set_dynamic_spec<precision_checker>( + this->specs_.precision, get_arg(arg_id), context_.error_handler()); + } + + void on_error(const char *message) { + context_.on_error(message); + } + + private: + FMT_CONSTEXPR basic_format_arg<Context> get_arg(auto_id) { + return context_.next_arg(); + } + + template <typename Id> + FMT_CONSTEXPR basic_format_arg<Context> get_arg(Id arg_id) { + context_.parse_context().check_arg_id(arg_id); + return context_.get_arg(arg_id); + } + + Context &context_; +}; + +// An argument reference. +template <typename Char> +struct arg_ref { + enum Kind { NONE, INDEX, NAME }; + + FMT_CONSTEXPR arg_ref() : kind(NONE), index(0) {} + FMT_CONSTEXPR explicit arg_ref(unsigned index) : kind(INDEX), index(index) {} + explicit arg_ref(basic_string_view<Char> nm) : kind(NAME) { + name = {nm.data(), nm.size()}; + } + + FMT_CONSTEXPR arg_ref &operator=(unsigned idx) { + kind = INDEX; + index = idx; + return *this; + } + + Kind kind; + union { + unsigned index; + string_value<Char> name; // This is not string_view because of gcc 4.4. + }; +}; + +// Format specifiers with width and precision resolved at formatting rather +// than parsing time to allow re-using the same parsed specifiers with +// differents sets of arguments (precompilation of format strings). +template <typename Char> +struct dynamic_format_specs : basic_format_specs<Char> { + arg_ref<Char> width_ref; + arg_ref<Char> precision_ref; +}; + +// Format spec handler that saves references to arguments representing dynamic +// width and precision to be resolved at formatting time. +template <typename ParseContext> +class dynamic_specs_handler : + public specs_setter<typename ParseContext::char_type> { + public: + typedef typename ParseContext::char_type char_type; + + FMT_CONSTEXPR dynamic_specs_handler( + dynamic_format_specs<char_type> &specs, ParseContext &ctx) + : specs_setter<char_type>(specs), specs_(specs), context_(ctx) {} + + FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler &other) + : specs_setter<char_type>(other), + specs_(other.specs_), context_(other.context_) {} + + template <typename Id> + FMT_CONSTEXPR void on_dynamic_width(Id arg_id) { + specs_.width_ref = make_arg_ref(arg_id); + } + + template <typename Id> + FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) { + specs_.precision_ref = make_arg_ref(arg_id); + } + + FMT_CONSTEXPR void on_error(const char *message) { + context_.on_error(message); + } + + private: + typedef arg_ref<char_type> arg_ref_type; + + template <typename Id> + FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) { + context_.check_arg_id(arg_id); + return arg_ref_type(arg_id); + } + + FMT_CONSTEXPR arg_ref_type make_arg_ref(auto_id) { + return arg_ref_type(context_.next_arg_id()); + } + + dynamic_format_specs<char_type> &specs_; + ParseContext &context_; +}; + +template <typename Iterator, typename IDHandler> +FMT_CONSTEXPR Iterator parse_arg_id(Iterator it, IDHandler &&handler) { + typedef typename std::iterator_traits<Iterator>::value_type char_type; + char_type c = *it; + if (c == '}' || c == ':') { + handler(); + return it; + } + if (c >= '0' && c <= '9') { + unsigned index = parse_nonnegative_int(it, handler); + if (*it != '}' && *it != ':') { + handler.on_error("invalid format string"); + return it; + } + handler(index); + return it; + } + if (!is_name_start(c)) { + handler.on_error("invalid format string"); + return it; + } + auto start = it; + do { + c = *++it; + } while (is_name_start(c) || ('0' <= c && c <= '9')); + handler(basic_string_view<char_type>( + pointer_from(start), to_unsigned(it - start))); + return it; +} + +template <typename Char, typename IDHandler> +FMT_CONSTEXPR const Char *parse_arg_id( + const Char *begin, const Char *end, IDHandler &&handler) { + assert(begin != end); + Char c = *begin; + if (c == '}' || c == ':') + return handler(), begin; + if (c >= '0' && c <= '9') { + unsigned index = parse_nonnegative_int(begin, end, handler); + if (begin == end || (*begin != '}' && *begin != ':')) + return handler.on_error("invalid format string"), begin; + handler(index); + return begin; + } + if (!is_name_start(c)) + return handler.on_error("invalid format string"), begin; + auto it = begin; + do { + c = *++it; + } while (it != end && (is_name_start(c) || ('0' <= c && c <= '9'))); + handler(basic_string_view<Char>(begin, to_unsigned(it - begin))); + return it; +} + +// Adapts SpecHandler to IDHandler API for dynamic width. +template <typename SpecHandler, typename Char> +struct width_adapter { + explicit FMT_CONSTEXPR width_adapter(SpecHandler &h) : handler(h) {} + + FMT_CONSTEXPR void operator()() { handler.on_dynamic_width(auto_id()); } + FMT_CONSTEXPR void operator()(unsigned id) { handler.on_dynamic_width(id); } + FMT_CONSTEXPR void operator()(basic_string_view<Char> id) { + handler.on_dynamic_width(id); + } + + FMT_CONSTEXPR void on_error(const char *message) { + handler.on_error(message); + } + + SpecHandler &handler; +}; + +// Adapts SpecHandler to IDHandler API for dynamic precision. +template <typename SpecHandler, typename Char> +struct precision_adapter { + explicit FMT_CONSTEXPR precision_adapter(SpecHandler &h) : handler(h) {} + + FMT_CONSTEXPR void operator()() { handler.on_dynamic_precision(auto_id()); } + FMT_CONSTEXPR void operator()(unsigned id) { + handler.on_dynamic_precision(id); + } + FMT_CONSTEXPR void operator()(basic_string_view<Char> id) { + handler.on_dynamic_precision(id); + } + + FMT_CONSTEXPR void on_error(const char *message) { handler.on_error(message); } + + SpecHandler &handler; +}; + +// Parses standard format specifiers and sends notifications about parsed +// components to handler. +// it: an iterator pointing to the beginning of a null-terminated range of +// characters, possibly emulated via null_terminating_iterator, representing +// format specifiers. +template <typename Iterator, typename SpecHandler> +FMT_CONSTEXPR Iterator parse_format_specs(Iterator it, SpecHandler &&handler) { + typedef typename std::iterator_traits<Iterator>::value_type char_type; + char_type c = *it; + if (c == '}' || !c) + return it; + + // Parse fill and alignment. + alignment align = ALIGN_DEFAULT; + int i = 1; + do { + auto p = it + i; + switch (static_cast<char>(*p)) { + case '<': + align = ALIGN_LEFT; + break; + case '>': + align = ALIGN_RIGHT; + break; + case '=': + align = ALIGN_NUMERIC; + break; + case '^': + align = ALIGN_CENTER; + break; + } + if (align != ALIGN_DEFAULT) { + if (p != it) { + if (c == '{') { + handler.on_error("invalid fill character '{'"); + return it; + } + it += 2; + handler.on_fill(c); + } else ++it; + handler.on_align(align); + break; + } + } while (--i >= 0); + + // Parse sign. + switch (static_cast<char>(*it)) { + case '+': + handler.on_plus(); + ++it; + break; + case '-': + handler.on_minus(); + ++it; + break; + case ' ': + handler.on_space(); + ++it; + break; + } + + if (*it == '#') { + handler.on_hash(); + ++it; + } + + // Parse zero flag. + if (*it == '0') { + handler.on_zero(); + ++it; + } + + // Parse width. + if ('0' <= *it && *it <= '9') { + handler.on_width(parse_nonnegative_int(it, handler)); + } else if (*it == '{') { + it = parse_arg_id(it + 1, width_adapter<SpecHandler, char_type>(handler)); + if (*it++ != '}') { + handler.on_error("invalid format string"); + return it; + } + } + + // Parse precision. + if (*it == '.') { + ++it; + if ('0' <= *it && *it <= '9') { + handler.on_precision(parse_nonnegative_int(it, handler)); + } else if (*it == '{') { + it = parse_arg_id( + it + 1, precision_adapter<SpecHandler, char_type>(handler)); + if (*it++ != '}') { + handler.on_error("invalid format string"); + return it; + } + } else { + handler.on_error("missing precision specifier"); + return it; + } + handler.end_precision(); + } + + // Parse type. + if (*it != '}' && *it) + handler.on_type(*it++); + return it; +} + +// Return the result via the out param to workaround gcc bug 77539. +template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*> +FMT_CONSTEXPR bool find(Ptr first, Ptr last, T value, Ptr &out) { + for (out = first; out != last; ++out) { + if (*out == value) + return true; + } + return false; +} + +template <> +inline bool find<false, char>( + const char *first, const char *last, char value, const char *&out) { + out = static_cast<const char*>(std::memchr(first, value, last - first)); + return out != FMT_NULL; +} + +template <typename Handler, typename Char> +struct id_adapter { + FMT_CONSTEXPR void operator()() { handler.on_arg_id(); } + FMT_CONSTEXPR void operator()(unsigned id) { handler.on_arg_id(id); } + FMT_CONSTEXPR void operator()(basic_string_view<Char> id) { + handler.on_arg_id(id); + } + FMT_CONSTEXPR void on_error(const char *message) { + handler.on_error(message); + } + Handler &handler; +}; + +template <bool IS_CONSTEXPR, typename Char, typename Handler> +FMT_CONSTEXPR void parse_format_string( + basic_string_view<Char> format_str, Handler &&handler) { + struct writer { + FMT_CONSTEXPR void operator()(const Char *begin, const Char *end) { + if (begin == end) return; + for (;;) { + const Char *p = FMT_NULL; + if (!find<IS_CONSTEXPR>(begin, end, '}', p)) + return handler_.on_text(begin, end); + ++p; + if (p == end || *p != '}') + return handler_.on_error("unmatched '}' in format string"); + handler_.on_text(begin, p); + begin = p + 1; + } + } + Handler &handler_; + } write{handler}; + auto begin = format_str.data(); + auto end = begin + format_str.size(); + while (begin != end) { + // Doing two passes with memchr (one for '{' and another for '}') is up to + // 2.5x faster than the naive one-pass implementation on big format strings. + const Char *p = begin; + if (*begin != '{' && !find<IS_CONSTEXPR>(begin, end, '{', p)) + return write(begin, end); + write(begin, p); + ++p; + if (p == end) + return handler.on_error("invalid format string"); + if (static_cast<char>(*p) == '}') { + handler.on_arg_id(); + handler.on_replacement_field(p); + } else if (*p == '{') { + handler.on_text(p, p + 1); + } else { + p = parse_arg_id(p, end, id_adapter<Handler, Char>{handler}); + Char c = p != end ? *p : Char(); + if (c == '}') { + handler.on_replacement_field(p); + } else if (c == ':') { + internal::null_terminating_iterator<Char> it(p + 1, end); + it = handler.on_format_specs(it); + if (*it != '}') + return handler.on_error("unknown format specifier"); + p = pointer_from(it); + } else { + return handler.on_error("missing '}' in format string"); + } + } + begin = p + 1; + } +} + +template <typename T, typename ParseContext> +FMT_CONSTEXPR const typename ParseContext::char_type * + parse_format_specs(ParseContext &ctx) { + // GCC 7.2 requires initializer. + formatter<T, typename ParseContext::char_type> f{}; + return f.parse(ctx); +} + +template <typename Char, typename ErrorHandler, typename... Args> +class format_string_checker { + public: + explicit FMT_CONSTEXPR format_string_checker( + basic_string_view<Char> format_str, ErrorHandler eh) + : arg_id_(-1), context_(format_str, eh), + parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {} + + typedef internal::null_terminating_iterator<Char> iterator; + + FMT_CONSTEXPR void on_text(const Char *, const Char *) {} + + FMT_CONSTEXPR void on_arg_id() { + arg_id_ = context_.next_arg_id(); + check_arg_id(); + } + FMT_CONSTEXPR void on_arg_id(unsigned id) { + arg_id_ = id; + context_.check_arg_id(id); + check_arg_id(); + } + FMT_CONSTEXPR void on_arg_id(basic_string_view<Char>) {} + + FMT_CONSTEXPR void on_replacement_field(const Char *) {} + + FMT_CONSTEXPR const Char *on_format_specs(iterator it) { + auto p = pointer_from(it); + context_.advance_to(p); + return to_unsigned(arg_id_) < NUM_ARGS ? + parse_funcs_[arg_id_](context_) : p; + } + + FMT_CONSTEXPR void on_error(const char *message) { + context_.on_error(message); + } + + private: + typedef basic_parse_context<Char, ErrorHandler> parse_context_type; + enum { NUM_ARGS = sizeof...(Args) }; + + FMT_CONSTEXPR void check_arg_id() { + if (internal::to_unsigned(arg_id_) >= NUM_ARGS) + context_.on_error("argument index out of range"); + } + + // Format specifier parsing function. + typedef const Char *(*parse_func)(parse_context_type &); + + int arg_id_; + parse_context_type context_; + parse_func parse_funcs_[NUM_ARGS > 0 ? NUM_ARGS : 1]; +}; + +template <typename Char, typename ErrorHandler, typename... Args> +FMT_CONSTEXPR bool do_check_format_string( + basic_string_view<Char> s, ErrorHandler eh = ErrorHandler()) { + format_string_checker<Char, ErrorHandler, Args...> checker(s, eh); + parse_format_string<true>(s, checker); + return true; +} + +template <typename... Args, typename S> +typename std::enable_if<is_compile_string<S>::value>::type + check_format_string(S format_str) { + typedef typename S::char_type char_t; + FMT_CONSTEXPR_DECL bool invalid_format = internal::do_check_format_string< + char_t, internal::error_handler, Args...>(to_string_view(format_str)); + (void)invalid_format; +} + +// Specifies whether to format T using the standard formatter. +// It is not possible to use get_type in formatter specialization directly +// because of a bug in MSVC. +template <typename Context, typename T> +struct format_type : + std::integral_constant<bool, get_type<Context, T>::value != custom_type> {}; + +template <template <typename> class Handler, typename Spec, typename Context> +void handle_dynamic_spec( + Spec &value, arg_ref<typename Context::char_type> ref, Context &ctx) { + typedef typename Context::char_type char_type; + switch (ref.kind) { + case arg_ref<char_type>::NONE: + break; + case arg_ref<char_type>::INDEX: + internal::set_dynamic_spec<Handler>( + value, ctx.get_arg(ref.index), ctx.error_handler()); + break; + case arg_ref<char_type>::NAME: + internal::set_dynamic_spec<Handler>( + value, ctx.get_arg({ref.name.value, ref.name.size}), + ctx.error_handler()); + break; + } +} +} // namespace internal + +/** The default argument formatter. */ +template <typename Range> +class arg_formatter: + public internal::function< + typename internal::arg_formatter_base<Range>::iterator>, + public internal::arg_formatter_base<Range> { + private: + typedef typename Range::value_type char_type; + typedef internal::arg_formatter_base<Range> base; + typedef basic_format_context<typename base::iterator, char_type> context_type; + + context_type &ctx_; + + public: + typedef Range range; + typedef typename base::iterator iterator; + typedef typename base::format_specs format_specs; + + /** + \rst + Constructs an argument formatter object. + *ctx* is a reference to the formatting context, + *spec* contains format specifier information for standard argument types. + \endrst + */ + explicit arg_formatter(context_type &ctx, format_specs *spec = FMT_NULL) + : base(Range(ctx.out()), spec, ctx.locale()), ctx_(ctx) {} + + // Deprecated. + arg_formatter(context_type &ctx, format_specs &spec) + : base(Range(ctx.out()), &spec), ctx_(ctx) {} + + using base::operator(); + + /** Formats an argument of a user-defined type. */ + iterator operator()(typename basic_format_arg<context_type>::handle handle) { + handle.format(ctx_); + return this->out(); + } +}; + +/** + An error returned by an operating system or a language runtime, + for example a file opening error. +*/ +class system_error : public std::runtime_error { + private: + FMT_API void init(int err_code, string_view format_str, format_args args); + + protected: + int error_code_; + + system_error() : std::runtime_error("") {} + + public: + /** + \rst + Constructs a :class:`fmt::system_error` object with a description + formatted with `fmt::format_system_error`. *message* and additional + arguments passed into the constructor are formatted similarly to + `fmt::format`. + + **Example**:: + + // This throws a system_error with the description + // cannot open file 'madeup': No such file or directory + // or similar (system message may vary). + const char *filename = "madeup"; + std::FILE *file = std::fopen(filename, "r"); + if (!file) + throw fmt::system_error(errno, "cannot open file '{}'", filename); + \endrst + */ + template <typename... Args> + system_error(int error_code, string_view message, const Args &... args) + : std::runtime_error("") { + init(error_code, message, make_format_args(args...)); + } + + int error_code() const { return error_code_; } +}; + +/** + \rst + Formats an error returned by an operating system or a language runtime, + for example a file opening error, and writes it to *out* in the following + form: + + .. parsed-literal:: + *<message>*: *<system-message>* + + where *<message>* is the passed message and *<system-message>* is + the system message corresponding to the error code. + *error_code* is a system error code as given by ``errno``. + If *error_code* is not a valid error code such as -1, the system message + may look like "Unknown error -1" and is platform-dependent. + \endrst + */ +FMT_API void format_system_error(internal::buffer &out, int error_code, + fmt::string_view message) FMT_NOEXCEPT; + +/** + This template provides operations for formatting and writing data into a + character range. + */ +template <typename Range> +class basic_writer { + public: + typedef typename Range::value_type char_type; + typedef decltype(internal::declval<Range>().begin()) iterator; + typedef basic_format_specs<char_type> format_specs; + + private: + iterator out_; // Output iterator. + internal::locale_ref locale_; + + iterator out() const { return out_; } + + // Attempts to reserve space for n extra characters in the output range. + // Returns a pointer to the reserved range or a reference to out_. + auto reserve(std::size_t n) -> decltype(internal::reserve(out_, n)) { + return internal::reserve(out_, n); + } + + // Writes a value in the format + // <left-padding><value><right-padding> + // where <value> is written by f(it). + template <typename F> + void write_padded(const align_spec &spec, F &&f); + + template <typename F> + struct padded_int_writer { + size_t size_; + string_view prefix; + char_type fill; + std::size_t padding; + F f; + + size_t size() const { return size_; } + size_t width() const { return size_; } + + template <typename It> + void operator()(It &&it) const { + if (prefix.size() != 0) + it = internal::copy_str<char_type>(prefix.begin(), prefix.end(), it); + it = std::fill_n(it, padding, fill); + f(it); + } + }; + + // Writes an integer in the format + // <left-padding><prefix><numeric-padding><digits><right-padding> + // where <digits> are written by f(it). + template <typename Spec, typename F> + void write_int(unsigned num_digits, string_view prefix, + const Spec &spec, F f) { + std::size_t size = prefix.size() + num_digits; + char_type fill = static_cast<char_type>(spec.fill()); + std::size_t padding = 0; + if (spec.align() == ALIGN_NUMERIC) { + if (spec.width() > size) { + padding = spec.width() - size; + size = spec.width(); + } + } else if (spec.precision > static_cast<int>(num_digits)) { + size = prefix.size() + internal::to_unsigned(spec.precision); + padding = internal::to_unsigned(spec.precision) - num_digits; + fill = static_cast<char_type>('0'); + } + align_spec as = spec; + if (spec.align() == ALIGN_DEFAULT) + as.align_ = ALIGN_RIGHT; + write_padded(as, padded_int_writer<F>{size, prefix, fill, padding, f}); + } + + // Writes a decimal integer. + template <typename Int> + void write_decimal(Int value) { + typedef typename internal::int_traits<Int>::main_type main_type; + main_type abs_value = static_cast<main_type>(value); + bool is_negative = internal::is_negative(value); + if (is_negative) + abs_value = 0 - abs_value; + unsigned num_digits = internal::count_digits(abs_value); + auto &&it = reserve((is_negative ? 1 : 0) + num_digits); + if (is_negative) + *it++ = static_cast<char_type>('-'); + it = internal::format_decimal<char_type>(it, abs_value, num_digits); + } + + // The handle_int_type_spec handler that writes an integer. + template <typename Int, typename Spec> + struct int_writer { + typedef typename internal::int_traits<Int>::main_type unsigned_type; + + basic_writer<Range> &writer; + const Spec &spec; + unsigned_type abs_value; + char prefix[4]; + unsigned prefix_size; + + string_view get_prefix() const { return string_view(prefix, prefix_size); } + + // Counts the number of digits in abs_value. BITS = log2(radix). + template <unsigned BITS> + unsigned count_digits() const { + unsigned_type n = abs_value; + unsigned num_digits = 0; + do { + ++num_digits; + } while ((n >>= BITS) != 0); + return num_digits; + } + + int_writer(basic_writer<Range> &w, Int value, const Spec &s) + : writer(w), spec(s), abs_value(static_cast<unsigned_type>(value)), + prefix_size(0) { + if (internal::is_negative(value)) { + prefix[0] = '-'; + ++prefix_size; + abs_value = 0 - abs_value; + } else if (spec.has(SIGN_FLAG)) { + prefix[0] = spec.has(PLUS_FLAG) ? '+' : ' '; + ++prefix_size; + } + } + + struct dec_writer { + unsigned_type abs_value; + unsigned num_digits; + + template <typename It> + void operator()(It &&it) const { + it = internal::format_decimal<char_type>(it, abs_value, num_digits); + } + }; + + void on_dec() { + unsigned num_digits = internal::count_digits(abs_value); + writer.write_int(num_digits, get_prefix(), spec, + dec_writer{abs_value, num_digits}); + } + + struct hex_writer { + int_writer &self; + unsigned num_digits; + + template <typename It> + void operator()(It &&it) const { + it = internal::format_uint<4, char_type>( + it, self.abs_value, num_digits, self.spec.type != 'x'); + } + }; + + void on_hex() { + if (spec.has(HASH_FLAG)) { + prefix[prefix_size++] = '0'; + prefix[prefix_size++] = static_cast<char>(spec.type); + } + unsigned num_digits = count_digits<4>(); + writer.write_int(num_digits, get_prefix(), spec, + hex_writer{*this, num_digits}); + } + + template <int BITS> + struct bin_writer { + unsigned_type abs_value; + unsigned num_digits; + + template <typename It> + void operator()(It &&it) const { + it = internal::format_uint<BITS, char_type>(it, abs_value, num_digits); + } + }; + + void on_bin() { + if (spec.has(HASH_FLAG)) { + prefix[prefix_size++] = '0'; + prefix[prefix_size++] = static_cast<char>(spec.type); + } + unsigned num_digits = count_digits<1>(); + writer.write_int(num_digits, get_prefix(), spec, + bin_writer<1>{abs_value, num_digits}); + } + + void on_oct() { + unsigned num_digits = count_digits<3>(); + if (spec.has(HASH_FLAG) && + spec.precision <= static_cast<int>(num_digits)) { + // Octal prefix '0' is counted as a digit, so only add it if precision + // is not greater than the number of digits. + prefix[prefix_size++] = '0'; + } + writer.write_int(num_digits, get_prefix(), spec, + bin_writer<3>{abs_value, num_digits}); + } + + enum { SEP_SIZE = 1 }; + + struct num_writer { + unsigned_type abs_value; + unsigned size; + char_type sep; + + template <typename It> + void operator()(It &&it) const { + basic_string_view<char_type> s(&sep, SEP_SIZE); + it = internal::format_decimal<char_type>( + it, abs_value, size, internal::add_thousands_sep<char_type>(s)); + } + }; + + void on_num() { + unsigned num_digits = internal::count_digits(abs_value); + char_type sep = internal::thousands_sep<char_type>(writer.locale_); + unsigned size = num_digits + SEP_SIZE * ((num_digits - 1) / 3); + writer.write_int(size, get_prefix(), spec, + num_writer{abs_value, size, sep}); + } + + void on_error() { + FMT_THROW(format_error("invalid type specifier")); + } + }; + + // Writes a formatted integer. + template <typename T, typename Spec> + void write_int(T value, const Spec &spec) { + internal::handle_int_type_spec(spec.type, + int_writer<T, Spec>(*this, value, spec)); + } + + enum {INF_SIZE = 3}; // This is an enum to workaround a bug in MSVC. + + struct inf_or_nan_writer { + char sign; + const char *str; + + size_t size() const { + return static_cast<std::size_t>(INF_SIZE + (sign ? 1 : 0)); + } + size_t width() const { return size(); } + + template <typename It> + void operator()(It &&it) const { + if (sign) + *it++ = static_cast<char_type>(sign); + it = internal::copy_str<char_type>( + str, str + static_cast<std::size_t>(INF_SIZE), it); + } + }; + + struct double_writer { + size_t n; + char sign; + internal::buffer &buffer; + + size_t size() const { return buffer.size() + (sign ? 1 : 0); } + size_t width() const { return size(); } + + template <typename It> + void operator()(It &&it) { + if (sign) { + *it++ = static_cast<char_type>(sign); + --n; + } + it = internal::copy_str<char_type>(buffer.begin(), buffer.end(), it); + } + }; + + // Formats a floating-point number (double or long double). + template <typename T> + void write_double(T value, const format_specs &spec); + + template <typename Char> + struct str_writer { + const Char *s; + size_t size_; + + size_t size() const { return size_; } + size_t width() const { + return internal::count_code_points(basic_string_view<Char>(s, size_)); + } + + template <typename It> + void operator()(It &&it) const { + it = internal::copy_str<char_type>(s, s + size_, it); + } + }; + + // Writes a formatted string. + template <typename Char> + void write_str(const Char *s, std::size_t size, const align_spec &spec) { + write_padded(spec, str_writer<Char>{s, size}); + } + + template <typename Char> + void write_str(basic_string_view<Char> str, const format_specs &spec); + + template <typename Char> + friend class internal::arg_formatter_base; + + public: + /** Constructs a ``basic_writer`` object. */ + explicit basic_writer( + Range out, internal::locale_ref loc = internal::locale_ref()) + : out_(out.begin()), locale_(loc) {} + + void write(int value) { write_decimal(value); } + void write(long value) { write_decimal(value); } + void write(long long value) { write_decimal(value); } + + void write(unsigned value) { write_decimal(value); } + void write(unsigned long value) { write_decimal(value); } + void write(unsigned long long value) { write_decimal(value); } + + /** + \rst + Formats *value* and writes it to the buffer. + \endrst + */ + template <typename T, typename FormatSpec, typename... FormatSpecs> + typename std::enable_if<std::is_integral<T>::value, void>::type + write(T value, FormatSpec spec, FormatSpecs... specs) { + format_specs s(spec, specs...); + s.align_ = ALIGN_RIGHT; + write_int(value, s); + } + + void write(double value) { + write_double(value, format_specs()); + } + + /** + \rst + Formats *value* using the general format for floating-point numbers + (``'g'``) and writes it to the buffer. + \endrst + */ + void write(long double value) { + write_double(value, format_specs()); + } + + /** Writes a character to the buffer. */ + void write(char value) { + *reserve(1) = value; + } + void write(wchar_t value) { + static_assert(std::is_same<char_type, wchar_t>::value, ""); + *reserve(1) = value; + } + + /** + \rst + Writes *value* to the buffer. + \endrst + */ + void write(string_view value) { + auto &&it = reserve(value.size()); + it = internal::copy_str<char_type>(value.begin(), value.end(), it); + } + void write(wstring_view value) { + static_assert(std::is_same<char_type, wchar_t>::value, ""); + auto &&it = reserve(value.size()); + it = std::copy(value.begin(), value.end(), it); + } + + template <typename... FormatSpecs> + void write(basic_string_view<char_type> str, FormatSpecs... specs) { + write_str(str, format_specs(specs...)); + } + + template <typename T> + typename std::enable_if<std::is_same<T, void>::value>::type + write(const T *p) { + format_specs specs; + specs.flags = HASH_FLAG; + specs.type = 'x'; + write_int(reinterpret_cast<uintptr_t>(p), specs); + } +}; + +template <typename Range> +template <typename F> +void basic_writer<Range>::write_padded(const align_spec &spec, F &&f) { + unsigned width = spec.width(); // User-perceived width (in code points). + size_t size = f.size(); // The number of code units. + size_t num_code_points = width != 0 ? f.width() : size; + if (width <= num_code_points) + return f(reserve(size)); + auto &&it = reserve(width + (size - num_code_points)); + char_type fill = static_cast<char_type>(spec.fill()); + std::size_t padding = width - num_code_points; + if (spec.align() == ALIGN_RIGHT) { + it = std::fill_n(it, padding, fill); + f(it); + } else if (spec.align() == ALIGN_CENTER) { + std::size_t left_padding = padding / 2; + it = std::fill_n(it, left_padding, fill); + f(it); + it = std::fill_n(it, padding - left_padding, fill); + } else { + f(it); + it = std::fill_n(it, padding, fill); + } +} + +template <typename Range> +template <typename Char> +void basic_writer<Range>::write_str( + basic_string_view<Char> s, const format_specs &spec) { + const Char *data = s.data(); + std::size_t size = s.size(); + if (spec.precision >= 0 && internal::to_unsigned(spec.precision) < size) + size = internal::to_unsigned(spec.precision); + write_str(data, size, spec); +} + +struct float_spec_handler { + char type; + bool upper; + + explicit float_spec_handler(char t) : type(t), upper(false) {} + + void on_general() { + if (type == 'G') + upper = true; + else + type = 'g'; + } + + void on_exp() { + if (type == 'E') + upper = true; + } + + void on_fixed() { + if (type == 'F') { + upper = true; +#if FMT_MSC_VER + // MSVC's printf doesn't support 'F'. + type = 'f'; +#endif + } + } + + void on_hex() { + if (type == 'A') + upper = true; + } + + void on_error() { + FMT_THROW(format_error("invalid type specifier")); + } +}; + +template <typename Range> +template <typename T> +void basic_writer<Range>::write_double(T value, const format_specs &spec) { + // Check type. + float_spec_handler handler(static_cast<char>(spec.type)); + internal::handle_float_type_spec(handler.type, handler); + + char sign = 0; + // Use signbit instead of value < 0 because the latter is always + // false for NaN. + if (std::signbit(value)) { + sign = '-'; + value = -value; + } else if (spec.has(SIGN_FLAG)) { + sign = spec.has(PLUS_FLAG) ? '+' : ' '; + } + + struct write_inf_or_nan_t { + basic_writer &writer; + format_specs spec; + char sign; + void operator()(const char *str) const { + writer.write_padded(spec, inf_or_nan_writer{sign, str}); + } + } write_inf_or_nan = {*this, spec, sign}; + + // Format NaN and ininity ourselves because sprintf's output is not consistent + // across platforms. + if (internal::fputil::isnotanumber(value)) + return write_inf_or_nan(handler.upper ? "NAN" : "nan"); + if (internal::fputil::isinfinity(value)) + return write_inf_or_nan(handler.upper ? "INF" : "inf"); + + memory_buffer buffer; + bool use_grisu = FMT_USE_GRISU && sizeof(T) <= sizeof(double) && + spec.type != 'a' && spec.type != 'A' && + internal::grisu2_format(static_cast<double>(value), buffer, spec); + if (!use_grisu) { + format_specs normalized_spec(spec); + normalized_spec.type = handler.type; + internal::sprintf_format(value, buffer, normalized_spec); + } + size_t n = buffer.size(); + align_spec as = spec; + if (spec.align() == ALIGN_NUMERIC) { + if (sign) { + auto &&it = reserve(1); + *it++ = static_cast<char_type>(sign); + sign = 0; + if (as.width_) + --as.width_; + } + as.align_ = ALIGN_RIGHT; + } else { + if (spec.align() == ALIGN_DEFAULT) + as.align_ = ALIGN_RIGHT; + if (sign) + ++n; + } + write_padded(as, double_writer{n, sign, buffer}); +} + +// Reports a system error without throwing an exception. +// Can be used to report errors from destructors. +FMT_API void report_system_error(int error_code, + string_view message) FMT_NOEXCEPT; + +#if FMT_USE_WINDOWS_H + +/** A Windows error. */ +class windows_error : public system_error { + private: + FMT_API void init(int error_code, string_view format_str, format_args args); + + public: + /** + \rst + Constructs a :class:`fmt::windows_error` object with the description + of the form + + .. parsed-literal:: + *<message>*: *<system-message>* + + where *<message>* is the formatted message and *<system-message>* is the + system message corresponding to the error code. + *error_code* is a Windows error code as given by ``GetLastError``. + If *error_code* is not a valid error code such as -1, the system message + will look like "error -1". + + **Example**:: + + // This throws a windows_error with the description + // cannot open file 'madeup': The system cannot find the file specified. + // or similar (system message may vary). + const char *filename = "madeup"; + LPOFSTRUCT of = LPOFSTRUCT(); + HFILE file = OpenFile(filename, &of, OF_READ); + if (file == HFILE_ERROR) { + throw fmt::windows_error(GetLastError(), + "cannot open file '{}'", filename); + } + \endrst + */ + template <typename... Args> + windows_error(int error_code, string_view message, const Args &... args) { + init(error_code, message, make_format_args(args...)); + } +}; + +// Reports a Windows error without throwing an exception. +// Can be used to report errors from destructors. +FMT_API void report_windows_error(int error_code, + string_view message) FMT_NOEXCEPT; + +#endif + +/** Fast integer formatter. */ +class format_int { + private: + // Buffer should be large enough to hold all digits (digits10 + 1), + // a sign and a null character. + enum {BUFFER_SIZE = std::numeric_limits<unsigned long long>::digits10 + 3}; + mutable char buffer_[BUFFER_SIZE]; + char *str_; + + // Formats value in reverse and returns a pointer to the beginning. + char *format_decimal(unsigned long long value) { + char *ptr = buffer_ + (BUFFER_SIZE - 1); // Parens to workaround MSVC bug. + while (value >= 100) { + // Integer division is slow so do it for a group of two digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + unsigned index = static_cast<unsigned>((value % 100) * 2); + value /= 100; + *--ptr = internal::data::DIGITS[index + 1]; + *--ptr = internal::data::DIGITS[index]; + } + if (value < 10) { + *--ptr = static_cast<char>('0' + value); + return ptr; + } + unsigned index = static_cast<unsigned>(value * 2); + *--ptr = internal::data::DIGITS[index + 1]; + *--ptr = internal::data::DIGITS[index]; + return ptr; + } + + void format_signed(long long value) { + unsigned long long abs_value = static_cast<unsigned long long>(value); + bool negative = value < 0; + if (negative) + abs_value = 0 - abs_value; + str_ = format_decimal(abs_value); + if (negative) + *--str_ = '-'; + } + + public: + explicit format_int(int value) { format_signed(value); } + explicit format_int(long value) { format_signed(value); } + explicit format_int(long long value) { format_signed(value); } + explicit format_int(unsigned value) : str_(format_decimal(value)) {} + explicit format_int(unsigned long value) : str_(format_decimal(value)) {} + explicit format_int(unsigned long long value) : str_(format_decimal(value)) {} + + /** Returns the number of characters written to the output buffer. */ + std::size_t size() const { + return internal::to_unsigned(buffer_ - str_ + BUFFER_SIZE - 1); + } + + /** + Returns a pointer to the output buffer content. No terminating null + character is appended. + */ + const char *data() const { return str_; } + + /** + Returns a pointer to the output buffer content with terminating null + character appended. + */ + const char *c_str() const { + buffer_[BUFFER_SIZE - 1] = '\0'; + return str_; + } + + /** + \rst + Returns the content of the output buffer as an ``std::string``. + \endrst + */ + std::string str() const { return std::string(str_, size()); } +}; + +// DEPRECATED! +// Formats a decimal integer value writing into buffer and returns +// a pointer to the end of the formatted string. This function doesn't +// write a terminating null character. +template <typename T> +inline void format_decimal(char *&buffer, T value) { + typedef typename internal::int_traits<T>::main_type main_type; + main_type abs_value = static_cast<main_type>(value); + if (internal::is_negative(value)) { + *buffer++ = '-'; + abs_value = 0 - abs_value; + } + if (abs_value < 100) { + if (abs_value < 10) { + *buffer++ = static_cast<char>('0' + abs_value); + return; + } + unsigned index = static_cast<unsigned>(abs_value * 2); + *buffer++ = internal::data::DIGITS[index]; + *buffer++ = internal::data::DIGITS[index + 1]; + return; + } + unsigned num_digits = internal::count_digits(abs_value); + internal::format_decimal<char>( + internal::make_checked(buffer, num_digits), abs_value, num_digits); + buffer += num_digits; +} + +// Formatter of objects of type T. +template <typename T, typename Char> +struct formatter< + T, Char, + typename std::enable_if<internal::format_type< + typename buffer_context<Char>::type, T>::value>::type> { + + // Parses format specifiers stopping either at the end of the range or at the + // terminating '}'. + template <typename ParseContext> + FMT_CONSTEXPR typename ParseContext::iterator parse(ParseContext &ctx) { + auto it = internal::null_terminating_iterator<Char>(ctx); + typedef internal::dynamic_specs_handler<ParseContext> handler_type; + auto type = internal::get_type< + typename buffer_context<Char>::type, T>::value; + internal::specs_checker<handler_type> + handler(handler_type(specs_, ctx), type); + it = parse_format_specs(it, handler); + auto type_spec = specs_.type; + auto eh = ctx.error_handler(); + switch (type) { + case internal::none_type: + case internal::named_arg_type: + FMT_ASSERT(false, "invalid argument type"); + break; + case internal::int_type: + case internal::uint_type: + case internal::long_long_type: + case internal::ulong_long_type: + case internal::bool_type: + handle_int_type_spec( + type_spec, internal::int_type_checker<decltype(eh)>(eh)); + break; + case internal::char_type: + handle_char_specs( + &specs_, + internal::char_specs_checker<decltype(eh)>(type_spec, eh)); + break; + case internal::double_type: + case internal::long_double_type: + handle_float_type_spec( + type_spec, internal::float_type_checker<decltype(eh)>(eh)); + break; + case internal::cstring_type: + internal::handle_cstring_type_spec( + type_spec, internal::cstring_type_checker<decltype(eh)>(eh)); + break; + case internal::string_type: + internal::check_string_type_spec(type_spec, eh); + break; + case internal::pointer_type: + internal::check_pointer_type_spec(type_spec, eh); + break; + case internal::custom_type: + // Custom format specifiers should be checked in parse functions of + // formatter specializations. + break; + } + return pointer_from(it); + } + + template <typename FormatContext> + auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out()) { + internal::handle_dynamic_spec<internal::width_checker>( + specs_.width_, specs_.width_ref, ctx); + internal::handle_dynamic_spec<internal::precision_checker>( + specs_.precision, specs_.precision_ref, ctx); + typedef output_range<typename FormatContext::iterator, + typename FormatContext::char_type> range_type; + return visit_format_arg(arg_formatter<range_type>(ctx, &specs_), + internal::make_arg<FormatContext>(val)); + } + + private: + internal::dynamic_format_specs<Char> specs_; +}; + +// A formatter for types known only at run time such as variant alternatives. +// +// Usage: +// typedef std::variant<int, std::string> variant; +// template <> +// struct formatter<variant>: dynamic_formatter<> { +// void format(buffer &buf, const variant &v, context &ctx) { +// visit([&](const auto &val) { format(buf, val, ctx); }, v); +// } +// }; +template <typename Char = char> +class dynamic_formatter { + private: + struct null_handler: internal::error_handler { + void on_align(alignment) {} + void on_plus() {} + void on_minus() {} + void on_space() {} + void on_hash() {} + }; + + public: + template <typename ParseContext> + auto parse(ParseContext &ctx) -> decltype(ctx.begin()) { + auto it = internal::null_terminating_iterator<Char>(ctx); + // Checks are deferred to formatting time when the argument type is known. + internal::dynamic_specs_handler<ParseContext> handler(specs_, ctx); + it = parse_format_specs(it, handler); + return pointer_from(it); + } + + template <typename T, typename FormatContext> + auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out()) { + handle_specs(ctx); + internal::specs_checker<null_handler> + checker(null_handler(), internal::get_type<FormatContext, T>::value); + checker.on_align(specs_.align()); + if (specs_.flags == 0); // Do nothing. + else if (specs_.has(SIGN_FLAG)) + specs_.has(PLUS_FLAG) ? checker.on_plus() : checker.on_space(); + else if (specs_.has(MINUS_FLAG)) + checker.on_minus(); + else if (specs_.has(HASH_FLAG)) + checker.on_hash(); + if (specs_.precision != -1) + checker.end_precision(); + typedef output_range<typename FormatContext::iterator, + typename FormatContext::char_type> range; + visit_format_arg(arg_formatter<range>(ctx, &specs_), + internal::make_arg<FormatContext>(val)); + return ctx.out(); + } + + private: + template <typename Context> + void handle_specs(Context &ctx) { + internal::handle_dynamic_spec<internal::width_checker>( + specs_.width_, specs_.width_ref, ctx); + internal::handle_dynamic_spec<internal::precision_checker>( + specs_.precision, specs_.precision_ref, ctx); + } + + internal::dynamic_format_specs<Char> specs_; +}; + +template <typename Range, typename Char> +typename basic_format_context<Range, Char>::format_arg + basic_format_context<Range, Char>::get_arg( + basic_string_view<char_type> name) { + map_.init(this->args()); + format_arg arg = map_.find(name); + if (arg.type() == internal::none_type) + this->on_error("argument not found"); + return arg; +} + +template <typename ArgFormatter, typename Char, typename Context> +struct format_handler : internal::error_handler { + typedef internal::null_terminating_iterator<Char> iterator; + typedef typename ArgFormatter::range range; + + format_handler(range r, basic_string_view<Char> str, + basic_format_args<Context> format_args, + internal::locale_ref loc) + : context(r.begin(), str, format_args, loc) {} + + void on_text(const Char *begin, const Char *end) { + auto size = internal::to_unsigned(end - begin); + auto out = context.out(); + auto &&it = internal::reserve(out, size); + it = std::copy_n(begin, size, it); + context.advance_to(out); + } + + void on_arg_id() { arg = context.next_arg(); } + void on_arg_id(unsigned id) { + context.parse_context().check_arg_id(id); + arg = context.get_arg(id); + } + void on_arg_id(basic_string_view<Char> id) { + arg = context.get_arg(id); + } + + void on_replacement_field(const Char *p) { + context.parse_context().advance_to(p); + internal::custom_formatter<Char, Context> f(context); + if (!visit_format_arg(f, arg)) + context.advance_to(visit_format_arg(ArgFormatter(context), arg)); + } + + iterator on_format_specs(iterator it) { + auto &parse_ctx = context.parse_context(); + parse_ctx.advance_to(pointer_from(it)); + internal::custom_formatter<Char, Context> f(context); + if (visit_format_arg(f, arg)) + return iterator(parse_ctx); + basic_format_specs<Char> specs; + using internal::specs_handler; + internal::specs_checker<specs_handler<Context>> + handler(specs_handler<Context>(specs, context), arg.type()); + it = parse_format_specs(it, handler); + if (*it != '}') + on_error("missing '}' in format string"); + parse_ctx.advance_to(pointer_from(it)); + context.advance_to(visit_format_arg(ArgFormatter(context, &specs), arg)); + return it; + } + + Context context; + basic_format_arg<Context> arg; +}; + +/** Formats arguments and writes the output to the range. */ +template <typename ArgFormatter, typename Char, typename Context> +typename Context::iterator vformat_to( + typename ArgFormatter::range out, + basic_string_view<Char> format_str, + basic_format_args<Context> args, + internal::locale_ref loc = internal::locale_ref()) { + format_handler<ArgFormatter, Char, Context> h(out, format_str, args, loc); + internal::parse_format_string<false>(format_str, h); + return h.context.out(); +} + +// Casts ``p`` to ``const void*`` for pointer formatting. +// Example: +// auto s = format("{}", ptr(p)); +template <typename T> +inline const void *ptr(const T *p) { return p; } + +template <typename It, typename Char> +struct arg_join { + It begin; + It end; + basic_string_view<Char> sep; + + arg_join(It begin, It end, basic_string_view<Char> sep) + : begin(begin), end(end), sep(sep) {} +}; + +template <typename It, typename Char> +struct formatter<arg_join<It, Char>, Char>: + formatter<typename std::iterator_traits<It>::value_type, Char> { + template <typename FormatContext> + auto format(const arg_join<It, Char> &value, FormatContext &ctx) + -> decltype(ctx.out()) { + typedef formatter<typename std::iterator_traits<It>::value_type, Char> base; + auto it = value.begin; + auto out = ctx.out(); + if (it != value.end) { + out = base::format(*it++, ctx); + while (it != value.end) { + out = std::copy(value.sep.begin(), value.sep.end(), out); + ctx.advance_to(out); + out = base::format(*it++, ctx); + } + } + return out; + } +}; + +template <typename It> +arg_join<It, char> join(It begin, It end, string_view sep) { + return arg_join<It, char>(begin, end, sep); +} + +template <typename It> +arg_join<It, wchar_t> join(It begin, It end, wstring_view sep) { + return arg_join<It, wchar_t>(begin, end, sep); +} + +// The following causes ICE in gcc 4.4. +#if FMT_USE_TRAILING_RETURN && (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 405) +template <typename Range> +auto join(const Range &range, string_view sep) + -> arg_join<decltype(internal::begin(range)), char> { + return join(internal::begin(range), internal::end(range), sep); +} + +template <typename Range> +auto join(const Range &range, wstring_view sep) + -> arg_join<decltype(internal::begin(range)), wchar_t> { + return join(internal::begin(range), internal::end(range), sep); +} +#endif + +/** + \rst + Converts *value* to ``std::string`` using the default format for type *T*. + It doesn't support user-defined types with custom formatters. + + **Example**:: + + #include <fmt/format.h> + + std::string answer = fmt::to_string(42); + \endrst + */ +template <typename T> +std::string to_string(const T &value) { + std::string str; + internal::container_buffer<std::string> buf(str); + writer(buf).write(value); + return str; +} + +/** + Converts *value* to ``std::wstring`` using the default format for type *T*. + */ +template <typename T> +std::wstring to_wstring(const T &value) { + std::wstring str; + internal::container_buffer<std::wstring> buf(str); + wwriter(buf).write(value); + return str; +} + +template <typename Char, std::size_t SIZE> +std::basic_string<Char> to_string(const basic_memory_buffer<Char, SIZE> &buf) { + return std::basic_string<Char>(buf.data(), buf.size()); +} + +template <typename Char> +typename buffer_context<Char>::type::iterator internal::vformat_to( + internal::basic_buffer<Char> &buf, basic_string_view<Char> format_str, + basic_format_args<typename buffer_context<Char>::type> args) { + typedef back_insert_range<internal::basic_buffer<Char> > range; + return vformat_to<arg_formatter<range>>( + buf, to_string_view(format_str), args); +} + +template <typename S, typename Char = FMT_CHAR(S)> +inline typename buffer_context<Char>::type::iterator vformat_to( + internal::basic_buffer<Char> &buf, const S &format_str, + basic_format_args<typename buffer_context<Char>::type> args) { + return internal::vformat_to(buf, to_string_view(format_str), args); +} + +template < + typename S, typename... Args, + std::size_t SIZE = inline_buffer_size, + typename Char = typename internal::char_t<S>::type> +inline typename buffer_context<Char>::type::iterator format_to( + basic_memory_buffer<Char, SIZE> &buf, const S &format_str, + const Args &... args) { + internal::check_format_string<Args...>(format_str); + typedef typename buffer_context<Char>::type context; + format_arg_store<context, Args...> as{args...}; + return internal::vformat_to(buf, to_string_view(format_str), + basic_format_args<context>(as)); +} + +namespace internal { + +// Detect the iterator category of *any* given type in a SFINAE-friendly way. +// Unfortunately, older implementations of std::iterator_traits are not safe +// for use in a SFINAE-context. + +// the gist of C++17's void_t magic +template<typename... Ts> +struct void_ { typedef void type; }; + +template <typename T, typename Enable = void> +struct it_category : std::false_type {}; + +template <typename T> +struct it_category<T*> { typedef std::random_access_iterator_tag type; }; + +template <typename T> +struct it_category<T, typename void_<typename T::iterator_category>::type> { + typedef typename T::iterator_category type; +}; + +// Detect if *any* given type models the OutputIterator concept. +template <typename It> +class is_output_iterator { + // Check for mutability because all iterator categories derived from + // std::input_iterator_tag *may* also meet the requirements of an + // OutputIterator, thereby falling into the category of 'mutable iterators' + // [iterator.requirements.general] clause 4. + // The compiler reveals this property only at the point of *actually + // dereferencing* the iterator! + template <typename U> + static decltype(*(internal::declval<U>())) test(std::input_iterator_tag); + template <typename U> + static char& test(std::output_iterator_tag); + template <typename U> + static const char& test(...); + + typedef decltype(test<It>(typename it_category<It>::type{})) type; + typedef typename std::remove_reference<type>::type result; + public: + static const bool value = !std::is_const<result>::value; +}; +} // internal + +template <typename OutputIt, typename Char = char> +//using format_context_t = basic_format_context<OutputIt, Char>; +struct format_context_t { typedef basic_format_context<OutputIt, Char> type; }; + +template <typename OutputIt, typename Char = char> +//using format_args_t = basic_format_args<format_context_t<OutputIt, Char>>; +struct format_args_t { + typedef basic_format_args< + typename format_context_t<OutputIt, Char>::type> type; +}; + +template <typename String, typename OutputIt, typename... Args> +inline typename std::enable_if<internal::is_output_iterator<OutputIt>::value, + OutputIt>::type + vformat_to(OutputIt out, const String &format_str, + typename format_args_t<OutputIt, FMT_CHAR(String)>::type args) { + typedef output_range<OutputIt, FMT_CHAR(String)> range; + return vformat_to<arg_formatter<range>>(range(out), + to_string_view(format_str), args); +} + +/** + \rst + Formats arguments, writes the result to the output iterator ``out`` and returns + the iterator past the end of the output range. + + **Example**:: + + std::vector<char> out; + fmt::format_to(std::back_inserter(out), "{}", 42); + \endrst + */ +template <typename OutputIt, typename S, typename... Args> +inline typename std::enable_if< + internal::is_string<S>::value && + internal::is_output_iterator<OutputIt>::value, OutputIt>::type + format_to(OutputIt out, const S &format_str, const Args &... args) { + internal::check_format_string<Args...>(format_str); + typedef typename format_context_t<OutputIt, FMT_CHAR(S)>::type context; + format_arg_store<context, Args...> as{args...}; + return vformat_to(out, to_string_view(format_str), + basic_format_args<context>(as)); +} + +template <typename OutputIt> +struct format_to_n_result { + /** Iterator past the end of the output range. */ + OutputIt out; + /** Total (not truncated) output size. */ + std::size_t size; +}; + +template <typename OutputIt, typename Char = typename OutputIt::value_type> +struct format_to_n_context : + format_context_t<fmt::internal::truncating_iterator<OutputIt>, Char> {}; + +template <typename OutputIt, typename Char = typename OutputIt::value_type> +struct format_to_n_args { + typedef basic_format_args< + typename format_to_n_context<OutputIt, Char>::type> type; +}; + +template <typename OutputIt, typename Char, typename ...Args> +inline format_arg_store< + typename format_to_n_context<OutputIt, Char>::type, Args...> + make_format_to_n_args(const Args &... args) { + return format_arg_store< + typename format_to_n_context<OutputIt, Char>::type, Args...>(args...); +} + +template <typename OutputIt, typename Char, typename... Args> +inline typename std::enable_if< + internal::is_output_iterator<OutputIt>::value, + format_to_n_result<OutputIt>>::type vformat_to_n( + OutputIt out, std::size_t n, basic_string_view<Char> format_str, + typename format_to_n_args<OutputIt, Char>::type args) { + typedef internal::truncating_iterator<OutputIt> It; + auto it = vformat_to(It(out, n), format_str, args); + return {it.base(), it.count()}; +} + +/** + \rst + Formats arguments, writes up to ``n`` characters of the result to the output + iterator ``out`` and returns the total output size and the iterator past the + end of the output range. + \endrst + */ +template <typename OutputIt, typename S, typename... Args> +inline typename std::enable_if< + internal::is_string<S>::value && + internal::is_output_iterator<OutputIt>::value, + format_to_n_result<OutputIt>>::type + format_to_n(OutputIt out, std::size_t n, const S &format_str, + const Args &... args) { + internal::check_format_string<Args...>(format_str); + typedef FMT_CHAR(S) Char; + format_arg_store< + typename format_to_n_context<OutputIt, Char>::type, Args...> as(args...); + return vformat_to_n(out, n, to_string_view(format_str), + typename format_to_n_args<OutputIt, Char>::type(as)); +} + +template <typename Char> +inline std::basic_string<Char> internal::vformat( + basic_string_view<Char> format_str, + basic_format_args<typename buffer_context<Char>::type> args) { + basic_memory_buffer<Char> buffer; + internal::vformat_to(buffer, format_str, args); + return fmt::to_string(buffer); +} + +/** + Returns the number of characters in the output of + ``format(format_str, args...)``. + */ +template <typename... Args> +inline std::size_t formatted_size(string_view format_str, + const Args &... args) { + auto it = format_to(internal::counting_iterator<char>(), format_str, args...); + return it.count(); +} + +#if FMT_USE_USER_DEFINED_LITERALS +namespace internal { + +# if FMT_UDL_TEMPLATE +template <typename Char, Char... CHARS> +class udl_formatter { + public: + template <typename... Args> + std::basic_string<Char> operator()(const Args &... args) const { + FMT_CONSTEXPR_DECL Char s[] = {CHARS..., '\0'}; + FMT_CONSTEXPR_DECL bool invalid_format = + do_check_format_string<Char, error_handler, Args...>( + basic_string_view<Char>(s, sizeof...(CHARS))); + (void)invalid_format; + return format(s, args...); + } +}; +# else +template <typename Char> +struct udl_formatter { + const Char *str; + + template <typename... Args> + auto operator()(Args &&... args) const + -> decltype(format(str, std::forward<Args>(args)...)) { + return format(str, std::forward<Args>(args)...); + } +}; +# endif // FMT_UDL_TEMPLATE + +template <typename Char> +struct udl_arg { + const Char *str; + + template <typename T> + named_arg<T, Char> operator=(T &&value) const { + return {str, std::forward<T>(value)}; + } +}; + +} // namespace internal + +inline namespace literals { + +# if FMT_UDL_TEMPLATE +template <typename Char, Char... CHARS> +FMT_CONSTEXPR internal::udl_formatter<Char, CHARS...> operator""_format() { + return {}; +} +# else +/** + \rst + User-defined literal equivalent of :func:`fmt::format`. + + **Example**:: + + using namespace fmt::literals; + std::string message = "The answer is {}"_format(42); + \endrst + */ +inline internal::udl_formatter<char> +operator"" _format(const char *s, std::size_t) { return {s}; } +inline internal::udl_formatter<wchar_t> +operator"" _format(const wchar_t *s, std::size_t) { return {s}; } +# endif // FMT_UDL_TEMPLATE + +/** + \rst + User-defined literal equivalent of :func:`fmt::arg`. + + **Example**:: + + using namespace fmt::literals; + fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23); + \endrst + */ +inline internal::udl_arg<char> +operator"" _a(const char *s, std::size_t) { return {s}; } +inline internal::udl_arg<wchar_t> +operator"" _a(const wchar_t *s, std::size_t) { return {s}; } +} // inline namespace literals +#endif // FMT_USE_USER_DEFINED_LITERALS +FMT_END_NAMESPACE + +#define FMT_STRING(s) [] { \ + typedef typename std::remove_cv<std::remove_pointer< \ + typename std::decay<decltype(s)>::type>::type>::type ct; \ + struct str : fmt::compile_string { \ + typedef ct char_type; \ + FMT_CONSTEXPR operator fmt::basic_string_view<ct>() const { \ + return {s, sizeof(s) / sizeof(ct) - 1}; \ + } \ + }; \ + return str{}; \ + }() + +#if defined(FMT_STRING_ALIAS) && FMT_STRING_ALIAS +/** + \rst + Constructs a compile-time format string. This macro is disabled by default to + prevent potential name collisions. To enable it define ``FMT_STRING_ALIAS`` to + 1 before including ``fmt/format.h``. + + **Example**:: + + #define FMT_STRING_ALIAS 1 + #include <fmt/format.h> + // A compile-time error because 'd' is an invalid specifier for strings. + std::string s = format(fmt("{:d}"), "foo"); + \endrst + */ +# define fmt(s) FMT_STRING(s) +#endif + +#ifdef FMT_HEADER_ONLY +# define FMT_FUNC inline +# include "format-inl.h" +#else +# define FMT_FUNC +#endif + +// Restore warnings. +#if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION +# pragma GCC diagnostic pop +#endif + +#endif // FMT_FORMAT_H_ diff --git a/src/seastar/fmt/include/fmt/locale.h b/src/seastar/fmt/include/fmt/locale.h new file mode 100644 index 00000000..8e021bc4 --- /dev/null +++ b/src/seastar/fmt/include/fmt/locale.h @@ -0,0 +1,77 @@ +// Formatting library for C++ - std::locale support +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_LOCALE_H_ +#define FMT_LOCALE_H_ + +#include "format.h" +#include <locale> + +FMT_BEGIN_NAMESPACE + +namespace internal { +template <typename Char> +typename buffer_context<Char>::type::iterator vformat_to( + const std::locale &loc, basic_buffer<Char> &buf, + basic_string_view<Char> format_str, + basic_format_args<typename buffer_context<Char>::type> args) { + typedef back_insert_range<basic_buffer<Char> > range; + return vformat_to<arg_formatter<range>>( + buf, to_string_view(format_str), args, internal::locale_ref(loc)); +} + +template <typename Char> +std::basic_string<Char> vformat( + const std::locale &loc, basic_string_view<Char> format_str, + basic_format_args<typename buffer_context<Char>::type> args) { + basic_memory_buffer<Char> buffer; + internal::vformat_to(loc, buffer, format_str, args); + return fmt::to_string(buffer); +} +} + +template <typename S, typename Char = FMT_CHAR(S)> +inline std::basic_string<Char> vformat( + const std::locale &loc, const S &format_str, + basic_format_args<typename buffer_context<Char>::type> args) { + return internal::vformat(loc, to_string_view(format_str), args); +} + +template <typename S, typename... Args> +inline std::basic_string<FMT_CHAR(S)> format( + const std::locale &loc, const S &format_str, const Args &... args) { + return internal::vformat( + loc, to_string_view(format_str), + *internal::checked_args<S, Args...>(format_str, args...)); +} + +template <typename String, typename OutputIt, typename... Args> +inline typename std::enable_if<internal::is_output_iterator<OutputIt>::value, + OutputIt>::type + vformat_to(OutputIt out, const std::locale &loc, const String &format_str, + typename format_args_t<OutputIt, FMT_CHAR(String)>::type args) { + typedef output_range<OutputIt, FMT_CHAR(String)> range; + return vformat_to<arg_formatter<range>>( + range(out), to_string_view(format_str), args, internal::locale_ref(loc)); +} + +template <typename OutputIt, typename S, typename... Args> +inline typename std::enable_if< + internal::is_string<S>::value && + internal::is_output_iterator<OutputIt>::value, OutputIt>::type + format_to(OutputIt out, const std::locale &loc, const S &format_str, + const Args &... args) { + internal::check_format_string<Args...>(format_str); + typedef typename format_context_t<OutputIt, FMT_CHAR(S)>::type context; + format_arg_store<context, Args...> as{args...}; + return vformat_to(out, loc, to_string_view(format_str), + basic_format_args<context>(as)); +} + +FMT_END_NAMESPACE + +#endif // FMT_LOCALE_H_ diff --git a/src/seastar/fmt/include/fmt/ostream.h b/src/seastar/fmt/include/fmt/ostream.h new file mode 100644 index 00000000..84b31cc5 --- /dev/null +++ b/src/seastar/fmt/include/fmt/ostream.h @@ -0,0 +1,153 @@ +// Formatting library for C++ - std::ostream support +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_OSTREAM_H_ +#define FMT_OSTREAM_H_ + +#include "format.h" +#include <ostream> + +FMT_BEGIN_NAMESPACE +namespace internal { + +template <class Char> +class formatbuf : public std::basic_streambuf<Char> { + private: + typedef typename std::basic_streambuf<Char>::int_type int_type; + typedef typename std::basic_streambuf<Char>::traits_type traits_type; + + basic_buffer<Char> &buffer_; + + public: + formatbuf(basic_buffer<Char> &buffer) : buffer_(buffer) {} + + protected: + // The put-area is actually always empty. This makes the implementation + // simpler and has the advantage that the streambuf and the buffer are always + // in sync and sputc never writes into uninitialized memory. The obvious + // disadvantage is that each call to sputc always results in a (virtual) call + // to overflow. There is no disadvantage here for sputn since this always + // results in a call to xsputn. + + int_type overflow(int_type ch = traits_type::eof()) FMT_OVERRIDE { + if (!traits_type::eq_int_type(ch, traits_type::eof())) + buffer_.push_back(static_cast<Char>(ch)); + return ch; + } + + std::streamsize xsputn(const Char *s, std::streamsize count) FMT_OVERRIDE { + buffer_.append(s, s + count); + return count; + } +}; + +template <typename Char> +struct test_stream : std::basic_ostream<Char> { + private: + struct null; + // Hide all operator<< from std::basic_ostream<Char>. + void operator<<(null); +}; + +// Checks if T has a user-defined operator<< (e.g. not a member of std::ostream). +template <typename T, typename Char> +class is_streamable { + private: + template <typename U> + static decltype( + internal::declval<test_stream<Char>&>() + << internal::declval<U>(), std::true_type()) test(int); + + template <typename> + static std::false_type test(...); + + typedef decltype(test<T>(0)) result; + + public: + static const bool value = result::value; +}; + +// Write the content of buf to os. +template <typename Char> +void write(std::basic_ostream<Char> &os, basic_buffer<Char> &buf) { + const Char *data = buf.data(); + typedef std::make_unsigned<std::streamsize>::type UnsignedStreamSize; + UnsignedStreamSize size = buf.size(); + UnsignedStreamSize max_size = + internal::to_unsigned((std::numeric_limits<std::streamsize>::max)()); + do { + UnsignedStreamSize n = size <= max_size ? size : max_size; + os.write(data, static_cast<std::streamsize>(n)); + data += n; + size -= n; + } while (size != 0); +} + +template <typename Char, typename T> +void format_value(basic_buffer<Char> &buffer, const T &value) { + internal::formatbuf<Char> format_buf(buffer); + std::basic_ostream<Char> output(&format_buf); + output.exceptions(std::ios_base::failbit | std::ios_base::badbit); + output << value; + buffer.resize(buffer.size()); +} +} // namespace internal + +// Disable conversion to int if T has an overloaded operator<< which is a free +// function (not a member of std::ostream). +template <typename T, typename Char> +struct convert_to_int<T, Char, void> { + static const bool value = + convert_to_int<T, Char, int>::value && + !internal::is_streamable<T, Char>::value; +}; + +// Formats an object of type T that has an overloaded ostream operator<<. +template <typename T, typename Char> +struct formatter<T, Char, + typename std::enable_if< + internal::is_streamable<T, Char>::value && + !internal::format_type< + typename buffer_context<Char>::type, T>::value>::type> + : formatter<basic_string_view<Char>, Char> { + + template <typename Context> + auto format(const T &value, Context &ctx) -> decltype(ctx.out()) { + basic_memory_buffer<Char> buffer; + internal::format_value(buffer, value); + basic_string_view<Char> str(buffer.data(), buffer.size()); + return formatter<basic_string_view<Char>, Char>::format(str, ctx); + } +}; + +template <typename Char> +inline void vprint(std::basic_ostream<Char> &os, + basic_string_view<Char> format_str, + basic_format_args<typename buffer_context<Char>::type> args) { + basic_memory_buffer<Char> buffer; + internal::vformat_to(buffer, format_str, args); + internal::write(os, buffer); +} +/** + \rst + Prints formatted data to the stream *os*. + + **Example**:: + + fmt::print(cerr, "Don't {}!", "panic"); + \endrst + */ +template <typename S, typename... Args> +inline typename std::enable_if<internal::is_string<S>::value>::type +print(std::basic_ostream<FMT_CHAR(S)> &os, const S &format_str, + const Args & ... args) { + internal::checked_args<S, Args...> ca(format_str, args...); + vprint(os, to_string_view(format_str), *ca); +} +FMT_END_NAMESPACE + +#endif // FMT_OSTREAM_H_ diff --git a/src/seastar/fmt/include/fmt/posix.h b/src/seastar/fmt/include/fmt/posix.h new file mode 100644 index 00000000..f4e3fad7 --- /dev/null +++ b/src/seastar/fmt/include/fmt/posix.h @@ -0,0 +1,324 @@ +// A C++ interface to POSIX functions. +// +// Copyright (c) 2012 - 2016, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_POSIX_H_ +#define FMT_POSIX_H_ + +#if defined(__MINGW32__) || defined(__CYGWIN__) +// Workaround MinGW bug https://sourceforge.net/p/mingw/bugs/2024/. +# undef __STRICT_ANSI__ +#endif + +#include <errno.h> +#include <fcntl.h> // for O_RDONLY +#include <locale.h> // for locale_t +#include <stdio.h> +#include <stdlib.h> // for strtod_l + +#include <cstddef> + +#if defined __APPLE__ || defined(__FreeBSD__) +# include <xlocale.h> // for LC_NUMERIC_MASK on OS X +#endif + +#include "format.h" + +#ifndef FMT_POSIX +# if defined(_WIN32) && !defined(__MINGW32__) +// Fix warnings about deprecated symbols. +# define FMT_POSIX(call) _##call +# else +# define FMT_POSIX(call) call +# endif +#endif + +// Calls to system functions are wrapped in FMT_SYSTEM for testability. +#ifdef FMT_SYSTEM +# define FMT_POSIX_CALL(call) FMT_SYSTEM(call) +#else +# define FMT_SYSTEM(call) call +# ifdef _WIN32 +// Fix warnings about deprecated symbols. +# define FMT_POSIX_CALL(call) ::_##call +# else +# define FMT_POSIX_CALL(call) ::call +# endif +#endif + +// Retries the expression while it evaluates to error_result and errno +// equals to EINTR. +#ifndef _WIN32 +# define FMT_RETRY_VAL(result, expression, error_result) \ + do { \ + result = (expression); \ + } while (result == error_result && errno == EINTR) +#else +# define FMT_RETRY_VAL(result, expression, error_result) result = (expression) +#endif + +#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1) + +FMT_BEGIN_NAMESPACE + +/** + \rst + A reference to a null-terminated string. It can be constructed from a C + string or ``std::string``. + + You can use one of the following typedefs for common character types: + + +---------------+-----------------------------+ + | Type | Definition | + +===============+=============================+ + | cstring_view | basic_cstring_view<char> | + +---------------+-----------------------------+ + | wcstring_view | basic_cstring_view<wchar_t> | + +---------------+-----------------------------+ + + This class is most useful as a parameter type to allow passing + different types of strings to a function, for example:: + + template <typename... Args> + std::string format(cstring_view format_str, const Args & ... args); + + format("{}", 42); + format(std::string("{}"), 42); + \endrst + */ +template <typename Char> +class basic_cstring_view { + private: + const Char *data_; + + public: + /** Constructs a string reference object from a C string. */ + basic_cstring_view(const Char *s) : data_(s) {} + + /** + \rst + Constructs a string reference from an ``std::string`` object. + \endrst + */ + basic_cstring_view(const std::basic_string<Char> &s) : data_(s.c_str()) {} + + /** Returns the pointer to a C string. */ + const Char *c_str() const { return data_; } +}; + +typedef basic_cstring_view<char> cstring_view; +typedef basic_cstring_view<wchar_t> wcstring_view; + +// An error code. +class error_code { + private: + int value_; + + public: + explicit error_code(int value = 0) FMT_NOEXCEPT : value_(value) {} + + int get() const FMT_NOEXCEPT { return value_; } +}; + +// A buffered file. +class buffered_file { + private: + FILE *file_; + + friend class file; + + explicit buffered_file(FILE *f) : file_(f) {} + + public: + // Constructs a buffered_file object which doesn't represent any file. + buffered_file() FMT_NOEXCEPT : file_(FMT_NULL) {} + + // Destroys the object closing the file it represents if any. + FMT_API ~buffered_file() FMT_NOEXCEPT; + + private: + buffered_file(const buffered_file &) = delete; + void operator=(const buffered_file &) = delete; + + + public: + buffered_file(buffered_file &&other) FMT_NOEXCEPT : file_(other.file_) { + other.file_ = FMT_NULL; + } + + buffered_file& operator=(buffered_file &&other) { + close(); + file_ = other.file_; + other.file_ = FMT_NULL; + return *this; + } + + // Opens a file. + FMT_API buffered_file(cstring_view filename, cstring_view mode); + + // Closes the file. + FMT_API void close(); + + // Returns the pointer to a FILE object representing this file. + FILE *get() const FMT_NOEXCEPT { return file_; } + + // We place parentheses around fileno to workaround a bug in some versions + // of MinGW that define fileno as a macro. + FMT_API int (fileno)() const; + + void vprint(string_view format_str, format_args args) { + fmt::vprint(file_, format_str, args); + } + + template <typename... Args> + inline void print(string_view format_str, const Args & ... args) { + vprint(format_str, make_format_args(args...)); + } +}; + +// A file. Closed file is represented by a file object with descriptor -1. +// Methods that are not declared with FMT_NOEXCEPT may throw +// fmt::system_error in case of failure. Note that some errors such as +// closing the file multiple times will cause a crash on Windows rather +// than an exception. You can get standard behavior by overriding the +// invalid parameter handler with _set_invalid_parameter_handler. +class file { + private: + int fd_; // File descriptor. + + // Constructs a file object with a given descriptor. + explicit file(int fd) : fd_(fd) {} + + public: + // Possible values for the oflag argument to the constructor. + enum { + RDONLY = FMT_POSIX(O_RDONLY), // Open for reading only. + WRONLY = FMT_POSIX(O_WRONLY), // Open for writing only. + RDWR = FMT_POSIX(O_RDWR) // Open for reading and writing. + }; + + // Constructs a file object which doesn't represent any file. + file() FMT_NOEXCEPT : fd_(-1) {} + + // Opens a file and constructs a file object representing this file. + FMT_API file(cstring_view path, int oflag); + + private: + file(const file &) = delete; + void operator=(const file &) = delete; + + public: + file(file &&other) FMT_NOEXCEPT : fd_(other.fd_) { + other.fd_ = -1; + } + + file& operator=(file &&other) { + close(); + fd_ = other.fd_; + other.fd_ = -1; + return *this; + } + + // Destroys the object closing the file it represents if any. + FMT_API ~file() FMT_NOEXCEPT; + + // Returns the file descriptor. + int descriptor() const FMT_NOEXCEPT { return fd_; } + + // Closes the file. + FMT_API void close(); + + // Returns the file size. The size has signed type for consistency with + // stat::st_size. + FMT_API long long size() const; + + // Attempts to read count bytes from the file into the specified buffer. + FMT_API std::size_t read(void *buffer, std::size_t count); + + // Attempts to write count bytes from the specified buffer to the file. + FMT_API std::size_t write(const void *buffer, std::size_t count); + + // Duplicates a file descriptor with the dup function and returns + // the duplicate as a file object. + FMT_API static file dup(int fd); + + // Makes fd be the copy of this file descriptor, closing fd first if + // necessary. + FMT_API void dup2(int fd); + + // Makes fd be the copy of this file descriptor, closing fd first if + // necessary. + FMT_API void dup2(int fd, error_code &ec) FMT_NOEXCEPT; + + // Creates a pipe setting up read_end and write_end file objects for reading + // and writing respectively. + FMT_API static void pipe(file &read_end, file &write_end); + + // Creates a buffered_file object associated with this file and detaches + // this file object from the file. + FMT_API buffered_file fdopen(const char *mode); +}; + +// Returns the memory page size. +long getpagesize(); + +#if (defined(LC_NUMERIC_MASK) || defined(_MSC_VER)) && \ + !defined(__ANDROID__) && !defined(__CYGWIN__) && !defined(__OpenBSD__) && \ + !defined(__NEWLIB_H__) +# define FMT_LOCALE +#endif + +#ifdef FMT_LOCALE +// A "C" numeric locale. +class Locale { + private: +# ifdef _MSC_VER + typedef _locale_t locale_t; + + enum { LC_NUMERIC_MASK = LC_NUMERIC }; + + static locale_t newlocale(int category_mask, const char *locale, locale_t) { + return _create_locale(category_mask, locale); + } + + static void freelocale(locale_t locale) { + _free_locale(locale); + } + + static double strtod_l(const char *nptr, char **endptr, _locale_t locale) { + return _strtod_l(nptr, endptr, locale); + } +# endif + + locale_t locale_; + + Locale(const Locale &) = delete; + void operator=(const Locale &) = delete; + + public: + typedef locale_t Type; + + Locale() : locale_(newlocale(LC_NUMERIC_MASK, "C", FMT_NULL)) { + if (!locale_) + FMT_THROW(system_error(errno, "cannot create locale")); + } + ~Locale() { freelocale(locale_); } + + Type get() const { return locale_; } + + // Converts string to floating-point number and advances str past the end + // of the parsed input. + double strtod(const char *&str) const { + char *end = FMT_NULL; + double result = strtod_l(str, &end, locale_); + str = end; + return result; + } +}; +#endif // FMT_LOCALE +FMT_END_NAMESPACE + +#endif // FMT_POSIX_H_ diff --git a/src/seastar/fmt/include/fmt/printf.h b/src/seastar/fmt/include/fmt/printf.h new file mode 100644 index 00000000..005df5f1 --- /dev/null +++ b/src/seastar/fmt/include/fmt/printf.h @@ -0,0 +1,728 @@ +// Formatting library for C++ +// +// Copyright (c) 2012 - 2016, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_PRINTF_H_ +#define FMT_PRINTF_H_ + +#include <algorithm> // std::fill_n +#include <limits> // std::numeric_limits + +#include "ostream.h" + +FMT_BEGIN_NAMESPACE +namespace internal { + +// Checks if a value fits in int - used to avoid warnings about comparing +// signed and unsigned integers. +template <bool IsSigned> +struct int_checker { + template <typename T> + static bool fits_in_int(T value) { + unsigned max = std::numeric_limits<int>::max(); + return value <= max; + } + static bool fits_in_int(bool) { return true; } +}; + +template <> +struct int_checker<true> { + template <typename T> + static bool fits_in_int(T value) { + return value >= std::numeric_limits<int>::min() && + value <= std::numeric_limits<int>::max(); + } + static bool fits_in_int(int) { return true; } +}; + +class printf_precision_handler: public function<int> { + public: + template <typename T> + typename std::enable_if<std::is_integral<T>::value, int>::type + operator()(T value) { + if (!int_checker<std::numeric_limits<T>::is_signed>::fits_in_int(value)) + FMT_THROW(format_error("number is too big")); + return static_cast<int>(value); + } + + template <typename T> + typename std::enable_if<!std::is_integral<T>::value, int>::type operator()(T) { + FMT_THROW(format_error("precision is not integer")); + return 0; + } +}; + +// An argument visitor that returns true iff arg is a zero integer. +class is_zero_int: public function<bool> { + public: + template <typename T> + typename std::enable_if<std::is_integral<T>::value, bool>::type + operator()(T value) { return value == 0; } + + template <typename T> + typename std::enable_if<!std::is_integral<T>::value, bool>::type + operator()(T) { return false; } +}; + +template <typename T> +struct make_unsigned_or_bool : std::make_unsigned<T> {}; + +template <> +struct make_unsigned_or_bool<bool> { + typedef bool type; +}; + +template <typename T, typename Context> +class arg_converter: public function<void> { + private: + typedef typename Context::char_type Char; + + basic_format_arg<Context> &arg_; + typename Context::char_type type_; + + public: + arg_converter(basic_format_arg<Context> &arg, Char type) + : arg_(arg), type_(type) {} + + void operator()(bool value) { + if (type_ != 's') + operator()<bool>(value); + } + + template <typename U> + typename std::enable_if<std::is_integral<U>::value>::type + operator()(U value) { + bool is_signed = type_ == 'd' || type_ == 'i'; + typedef typename std::conditional< + std::is_same<T, void>::value, U, T>::type TargetType; + if (const_check(sizeof(TargetType) <= sizeof(int))) { + // Extra casts are used to silence warnings. + if (is_signed) { + arg_ = internal::make_arg<Context>( + static_cast<int>(static_cast<TargetType>(value))); + } else { + typedef typename make_unsigned_or_bool<TargetType>::type Unsigned; + arg_ = internal::make_arg<Context>( + static_cast<unsigned>(static_cast<Unsigned>(value))); + } + } else { + if (is_signed) { + // glibc's printf doesn't sign extend arguments of smaller types: + // std::printf("%lld", -42); // prints "4294967254" + // but we don't have to do the same because it's a UB. + arg_ = internal::make_arg<Context>(static_cast<long long>(value)); + } else { + arg_ = internal::make_arg<Context>( + static_cast<typename make_unsigned_or_bool<U>::type>(value)); + } + } + } + + template <typename U> + typename std::enable_if<!std::is_integral<U>::value>::type operator()(U) { + // No coversion needed for non-integral types. + } +}; + +// Converts an integer argument to T for printf, if T is an integral type. +// If T is void, the argument is converted to corresponding signed or unsigned +// type depending on the type specifier: 'd' and 'i' - signed, other - +// unsigned). +template <typename T, typename Context, typename Char> +void convert_arg(basic_format_arg<Context> &arg, Char type) { + visit_format_arg(arg_converter<T, Context>(arg, type), arg); +} + +// Converts an integer argument to char for printf. +template <typename Context> +class char_converter: public function<void> { + private: + basic_format_arg<Context> &arg_; + + public: + explicit char_converter(basic_format_arg<Context> &arg) : arg_(arg) {} + + template <typename T> + typename std::enable_if<std::is_integral<T>::value>::type + operator()(T value) { + typedef typename Context::char_type Char; + arg_ = internal::make_arg<Context>(static_cast<Char>(value)); + } + + template <typename T> + typename std::enable_if<!std::is_integral<T>::value>::type operator()(T) { + // No coversion needed for non-integral types. + } +}; + +// Checks if an argument is a valid printf width specifier and sets +// left alignment if it is negative. +template <typename Char> +class printf_width_handler: public function<unsigned> { + private: + typedef basic_format_specs<Char> format_specs; + + format_specs &spec_; + + public: + explicit printf_width_handler(format_specs &spec) : spec_(spec) {} + + template <typename T> + typename std::enable_if<std::is_integral<T>::value, unsigned>::type + operator()(T value) { + typedef typename internal::int_traits<T>::main_type UnsignedType; + UnsignedType width = static_cast<UnsignedType>(value); + if (internal::is_negative(value)) { + spec_.align_ = ALIGN_LEFT; + width = 0 - width; + } + unsigned int_max = std::numeric_limits<int>::max(); + if (width > int_max) + FMT_THROW(format_error("number is too big")); + return static_cast<unsigned>(width); + } + + template <typename T> + typename std::enable_if<!std::is_integral<T>::value, unsigned>::type + operator()(T) { + FMT_THROW(format_error("width is not integer")); + return 0; + } +}; +} // namespace internal + +template <typename Range> +class printf_arg_formatter; + +template < + typename OutputIt, typename Char, + typename ArgFormatter = + printf_arg_formatter<back_insert_range<internal::basic_buffer<Char>>>> +class basic_printf_context; + +/** + \rst + The ``printf`` argument formatter. + \endrst + */ +template <typename Range> +class printf_arg_formatter: + public internal::function< + typename internal::arg_formatter_base<Range>::iterator>, + public internal::arg_formatter_base<Range> { + private: + typedef typename Range::value_type char_type; + typedef decltype(internal::declval<Range>().begin()) iterator; + typedef internal::arg_formatter_base<Range> base; + typedef basic_printf_context<iterator, char_type> context_type; + + context_type &context_; + + void write_null_pointer(char) { + this->spec()->type = 0; + this->write("(nil)"); + } + + void write_null_pointer(wchar_t) { + this->spec()->type = 0; + this->write(L"(nil)"); + } + + public: + typedef typename base::format_specs format_specs; + + /** + \rst + Constructs an argument formatter object. + *buffer* is a reference to the output buffer and *spec* contains format + specifier information for standard argument types. + \endrst + */ + printf_arg_formatter(internal::basic_buffer<char_type> &buffer, + format_specs &spec, context_type &ctx) + : base(back_insert_range<internal::basic_buffer<char_type>>(buffer), &spec, + ctx.locale()), + context_(ctx) {} + + template <typename T> + typename std::enable_if<std::is_integral<T>::value, iterator>::type + operator()(T value) { + // MSVC2013 fails to compile separate overloads for bool and char_type so + // use std::is_same instead. + if (std::is_same<T, bool>::value) { + format_specs &fmt_spec = *this->spec(); + if (fmt_spec.type != 's') + return base::operator()(value ? 1 : 0); + fmt_spec.type = 0; + this->write(value != 0); + } else if (std::is_same<T, char_type>::value) { + format_specs &fmt_spec = *this->spec(); + if (fmt_spec.type && fmt_spec.type != 'c') + return (*this)(static_cast<int>(value)); + fmt_spec.flags = 0; + fmt_spec.align_ = ALIGN_RIGHT; + return base::operator()(value); + } else { + return base::operator()(value); + } + return this->out(); + } + + template <typename T> + typename std::enable_if<std::is_floating_point<T>::value, iterator>::type + operator()(T value) { + return base::operator()(value); + } + + /** Formats a null-terminated C string. */ + iterator operator()(const char *value) { + if (value) + base::operator()(value); + else if (this->spec()->type == 'p') + write_null_pointer(char_type()); + else + this->write("(null)"); + return this->out(); + } + + /** Formats a null-terminated wide C string. */ + iterator operator()(const wchar_t *value) { + if (value) + base::operator()(value); + else if (this->spec()->type == 'p') + write_null_pointer(char_type()); + else + this->write(L"(null)"); + return this->out(); + } + + iterator operator()(basic_string_view<char_type> value) { + return base::operator()(value); + } + + iterator operator()(monostate value) { + return base::operator()(value); + } + + /** Formats a pointer. */ + iterator operator()(const void *value) { + if (value) + return base::operator()(value); + this->spec()->type = 0; + write_null_pointer(char_type()); + return this->out(); + } + + /** Formats an argument of a custom (user-defined) type. */ + iterator operator()(typename basic_format_arg<context_type>::handle handle) { + handle.format(context_); + return this->out(); + } +}; + +template <typename T> +struct printf_formatter { + template <typename ParseContext> + auto parse(ParseContext &ctx) -> decltype(ctx.begin()) { return ctx.begin(); } + + template <typename FormatContext> + auto format(const T &value, FormatContext &ctx) -> decltype(ctx.out()) { + internal::format_value(internal::get_container(ctx.out()), value); + return ctx.out(); + } +}; + +/** This template formats data and writes the output to a writer. */ +template <typename OutputIt, typename Char, typename ArgFormatter> +class basic_printf_context : + // Inherit publicly as a workaround for the icc bug + // https://software.intel.com/en-us/forums/intel-c-compiler/topic/783476. + public internal::context_base< + OutputIt, basic_printf_context<OutputIt, Char, ArgFormatter>, Char> { + public: + /** The character type for the output. */ + typedef Char char_type; + + template <typename T> + struct formatter_type { typedef printf_formatter<T> type; }; + + private: + typedef internal::context_base<OutputIt, basic_printf_context, Char> base; + typedef typename base::format_arg format_arg; + typedef basic_format_specs<char_type> format_specs; + typedef internal::null_terminating_iterator<char_type> iterator; + + void parse_flags(format_specs &spec, iterator &it); + + // Returns the argument with specified index or, if arg_index is equal + // to the maximum unsigned value, the next argument. + format_arg get_arg( + iterator it, + unsigned arg_index = (std::numeric_limits<unsigned>::max)()); + + // Parses argument index, flags and width and returns the argument index. + unsigned parse_header(iterator &it, format_specs &spec); + + public: + /** + \rst + Constructs a ``printf_context`` object. References to the arguments and + the writer are stored in the context object so make sure they have + appropriate lifetimes. + \endrst + */ + basic_printf_context(OutputIt out, basic_string_view<char_type> format_str, + basic_format_args<basic_printf_context> args) + : base(out, format_str, args) {} + + using base::parse_context; + using base::out; + using base::advance_to; + + /** Formats stored arguments and writes the output to the range. */ + void format(); +}; + +template <typename OutputIt, typename Char, typename AF> +void basic_printf_context<OutputIt, Char, AF>::parse_flags( + format_specs &spec, iterator &it) { + for (;;) { + switch (*it++) { + case '-': + spec.align_ = ALIGN_LEFT; + break; + case '+': + spec.flags |= SIGN_FLAG | PLUS_FLAG; + break; + case '0': + spec.fill_ = '0'; + break; + case ' ': + spec.flags |= SIGN_FLAG; + break; + case '#': + spec.flags |= HASH_FLAG; + break; + default: + --it; + return; + } + } +} + +template <typename OutputIt, typename Char, typename AF> +typename basic_printf_context<OutputIt, Char, AF>::format_arg + basic_printf_context<OutputIt, Char, AF>::get_arg( + iterator it, unsigned arg_index) { + (void)it; + if (arg_index == std::numeric_limits<unsigned>::max()) + return this->do_get_arg(this->parse_context().next_arg_id()); + return base::get_arg(arg_index - 1); +} + +template <typename OutputIt, typename Char, typename AF> +unsigned basic_printf_context<OutputIt, Char, AF>::parse_header( + iterator &it, format_specs &spec) { + unsigned arg_index = std::numeric_limits<unsigned>::max(); + char_type c = *it; + if (c >= '0' && c <= '9') { + // Parse an argument index (if followed by '$') or a width possibly + // preceded with '0' flag(s). + internal::error_handler eh; + unsigned value = parse_nonnegative_int(it, eh); + if (*it == '$') { // value is an argument index + ++it; + arg_index = value; + } else { + if (c == '0') + spec.fill_ = '0'; + if (value != 0) { + // Nonzero value means that we parsed width and don't need to + // parse it or flags again, so return now. + spec.width_ = value; + return arg_index; + } + } + } + parse_flags(spec, it); + // Parse width. + if (*it >= '0' && *it <= '9') { + internal::error_handler eh; + spec.width_ = parse_nonnegative_int(it, eh); + } else if (*it == '*') { + ++it; + spec.width_ = visit_format_arg( + internal::printf_width_handler<char_type>(spec), get_arg(it)); + } + return arg_index; +} + +template <typename OutputIt, typename Char, typename AF> +void basic_printf_context<OutputIt, Char, AF>::format() { + auto &buffer = internal::get_container(this->out()); + auto start = iterator(this->parse_context()); + auto it = start; + using internal::pointer_from; + while (*it) { + char_type c = *it++; + if (c != '%') continue; + if (*it == c) { + buffer.append(pointer_from(start), pointer_from(it)); + start = ++it; + continue; + } + buffer.append(pointer_from(start), pointer_from(it) - 1); + + format_specs spec; + spec.align_ = ALIGN_RIGHT; + + // Parse argument index, flags and width. + unsigned arg_index = parse_header(it, spec); + + // Parse precision. + if (*it == '.') { + ++it; + if ('0' <= *it && *it <= '9') { + internal::error_handler eh; + spec.precision = static_cast<int>(parse_nonnegative_int(it, eh)); + } else if (*it == '*') { + ++it; + spec.precision = + visit_format_arg(internal::printf_precision_handler(), get_arg(it)); + } else { + spec.precision = 0; + } + } + + format_arg arg = get_arg(it, arg_index); + if (spec.has(HASH_FLAG) && visit_format_arg(internal::is_zero_int(), arg)) + spec.flags &= ~internal::to_unsigned<int>(HASH_FLAG); + if (spec.fill_ == '0') { + if (arg.is_arithmetic()) + spec.align_ = ALIGN_NUMERIC; + else + spec.fill_ = ' '; // Ignore '0' flag for non-numeric types. + } + + // Parse length and convert the argument to the required type. + using internal::convert_arg; + switch (*it++) { + case 'h': + if (*it == 'h') + convert_arg<signed char>(arg, *++it); + else + convert_arg<short>(arg, *it); + break; + case 'l': + if (*it == 'l') + convert_arg<long long>(arg, *++it); + else + convert_arg<long>(arg, *it); + break; + case 'j': + convert_arg<intmax_t>(arg, *it); + break; + case 'z': + convert_arg<std::size_t>(arg, *it); + break; + case 't': + convert_arg<std::ptrdiff_t>(arg, *it); + break; + case 'L': + // printf produces garbage when 'L' is omitted for long double, no + // need to do the same. + break; + default: + --it; + convert_arg<void>(arg, *it); + } + + // Parse type. + if (!*it) + FMT_THROW(format_error("invalid format string")); + spec.type = static_cast<char>(*it++); + if (arg.is_integral()) { + // Normalize type. + switch (spec.type) { + case 'i': case 'u': + spec.type = 'd'; + break; + case 'c': + // TODO: handle wchar_t better? + visit_format_arg( + internal::char_converter<basic_printf_context>(arg), arg); + break; + } + } + + start = it; + + // Format argument. + visit_format_arg(AF(buffer, spec, *this), arg); + } + buffer.append(pointer_from(start), pointer_from(it)); +} + +template <typename Char, typename Context> +void printf(internal::basic_buffer<Char> &buf, basic_string_view<Char> format, + basic_format_args<Context> args) { + Context(std::back_inserter(buf), format, args).format(); +} + +template <typename Buffer> +struct basic_printf_context_t { + typedef basic_printf_context< + std::back_insert_iterator<Buffer>, typename Buffer::value_type> type; +}; + +typedef basic_printf_context_t<internal::buffer>::type printf_context; +typedef basic_printf_context_t<internal::wbuffer>::type wprintf_context; + +typedef basic_format_args<printf_context> printf_args; +typedef basic_format_args<wprintf_context> wprintf_args; + +/** + \rst + Constructs an `~fmt::format_arg_store` object that contains references to + arguments and can be implicitly converted to `~fmt::printf_args`. + \endrst + */ +template<typename... Args> +inline format_arg_store<printf_context, Args...> + make_printf_args(const Args &... args) { return {args...}; } + +/** + \rst + Constructs an `~fmt::format_arg_store` object that contains references to + arguments and can be implicitly converted to `~fmt::wprintf_args`. + \endrst + */ +template<typename... Args> +inline format_arg_store<wprintf_context, Args...> + make_wprintf_args(const Args &... args) { return {args...}; } + +template <typename S, typename Char = FMT_CHAR(S)> +inline std::basic_string<Char> +vsprintf(const S &format, + basic_format_args<typename basic_printf_context_t< + internal::basic_buffer<Char>>::type> args) { + basic_memory_buffer<Char> buffer; + printf(buffer, to_string_view(format), args); + return to_string(buffer); +} + +/** + \rst + Formats arguments and returns the result as a string. + + **Example**:: + + std::string message = fmt::sprintf("The answer is %d", 42); + \endrst +*/ +template <typename S, typename... Args> +inline FMT_ENABLE_IF_STRING(S, std::basic_string<FMT_CHAR(S)>) + sprintf(const S &format, const Args & ... args) { + internal::check_format_string<Args...>(format); + typedef internal::basic_buffer<FMT_CHAR(S)> buffer; + typedef typename basic_printf_context_t<buffer>::type context; + format_arg_store<context, Args...> as{ args... }; + return vsprintf(to_string_view(format), + basic_format_args<context>(as)); +} + +template <typename S, typename Char = FMT_CHAR(S)> +inline int vfprintf(std::FILE *f, const S &format, + basic_format_args<typename basic_printf_context_t< + internal::basic_buffer<Char>>::type> args) { + basic_memory_buffer<Char> buffer; + printf(buffer, to_string_view(format), args); + std::size_t size = buffer.size(); + return std::fwrite( + buffer.data(), sizeof(Char), size, f) < size ? -1 : static_cast<int>(size); +} + +/** + \rst + Prints formatted data to the file *f*. + + **Example**:: + + fmt::fprintf(stderr, "Don't %s!", "panic"); + \endrst + */ +template <typename S, typename... Args> +inline FMT_ENABLE_IF_STRING(S, int) + fprintf(std::FILE *f, const S &format, const Args & ... args) { + internal::check_format_string<Args...>(format); + typedef internal::basic_buffer<FMT_CHAR(S)> buffer; + typedef typename basic_printf_context_t<buffer>::type context; + format_arg_store<context, Args...> as{ args... }; + return vfprintf(f, to_string_view(format), + basic_format_args<context>(as)); +} + +template <typename S, typename Char = FMT_CHAR(S)> +inline int vprintf(const S &format, + basic_format_args<typename basic_printf_context_t< + internal::basic_buffer<Char>>::type> args) { + return vfprintf(stdout, to_string_view(format), args); +} + +/** + \rst + Prints formatted data to ``stdout``. + + **Example**:: + + fmt::printf("Elapsed time: %.2f seconds", 1.23); + \endrst + */ +template <typename S, typename... Args> +inline FMT_ENABLE_IF_STRING(S, int) + printf(const S &format_str, const Args & ... args) { + internal::check_format_string<Args...>(format_str); + typedef internal::basic_buffer<FMT_CHAR(S)> buffer; + typedef typename basic_printf_context_t<buffer>::type context; + format_arg_store<context, Args...> as{ args... }; + return vprintf(to_string_view(format_str), + basic_format_args<context>(as)); +} + +template <typename S, typename Char = FMT_CHAR(S)> +inline int vfprintf(std::basic_ostream<Char> &os, + const S &format, + basic_format_args<typename basic_printf_context_t< + internal::basic_buffer<Char>>::type> args) { + basic_memory_buffer<Char> buffer; + printf(buffer, to_string_view(format), args); + internal::write(os, buffer); + return static_cast<int>(buffer.size()); +} + +/** + \rst + Prints formatted data to the stream *os*. + + **Example**:: + + fmt::fprintf(cerr, "Don't %s!", "panic"); + \endrst + */ +template <typename S, typename... Args> +inline FMT_ENABLE_IF_STRING(S, int) + fprintf(std::basic_ostream<FMT_CHAR(S)> &os, + const S &format_str, const Args & ... args) { + internal::check_format_string<Args...>(format_str); + typedef internal::basic_buffer<FMT_CHAR(S)> buffer; + typedef typename basic_printf_context_t<buffer>::type context; + format_arg_store<context, Args...> as{ args... }; + return vfprintf(os, to_string_view(format_str), + basic_format_args<context>(as)); +} +FMT_END_NAMESPACE + +#endif // FMT_PRINTF_H_ diff --git a/src/seastar/fmt/include/fmt/ranges.h b/src/seastar/fmt/include/fmt/ranges.h new file mode 100644 index 00000000..3672d4ca --- /dev/null +++ b/src/seastar/fmt/include/fmt/ranges.h @@ -0,0 +1,308 @@ +// Formatting library for C++ - the core API +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. +// +// Copyright (c) 2018 - present, Remotion (Igor Schulz) +// All Rights Reserved +// {fmt} support for ranges, containers and types tuple interface. + +#ifndef FMT_RANGES_H_ +#define FMT_RANGES_H_ + +#include "format.h" +#include <type_traits> + +// output only up to N items from the range. +#ifndef FMT_RANGE_OUTPUT_LENGTH_LIMIT +# define FMT_RANGE_OUTPUT_LENGTH_LIMIT 256 +#endif + +FMT_BEGIN_NAMESPACE + +template <typename Char> +struct formatting_base { + template <typename ParseContext> + FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin()) { + return ctx.begin(); + } +}; + +template <typename Char, typename Enable = void> +struct formatting_range : formatting_base<Char> { + static FMT_CONSTEXPR_DECL const std::size_t range_length_limit = + FMT_RANGE_OUTPUT_LENGTH_LIMIT; // output only up to N items from the range. + Char prefix; + Char delimiter; + Char postfix; + formatting_range() : prefix('{'), delimiter(','), postfix('}') {} + static FMT_CONSTEXPR_DECL const bool add_delimiter_spaces = true; + static FMT_CONSTEXPR_DECL const bool add_prepostfix_space = false; +}; + +template <typename Char, typename Enable = void> +struct formatting_tuple : formatting_base<Char> { + Char prefix; + Char delimiter; + Char postfix; + formatting_tuple() : prefix('('), delimiter(','), postfix(')') {} + static FMT_CONSTEXPR_DECL const bool add_delimiter_spaces = true; + static FMT_CONSTEXPR_DECL const bool add_prepostfix_space = false; +}; + +namespace internal { + +template <typename RangeT, typename OutputIterator> +void copy(const RangeT &range, OutputIterator out) { + for (auto it = range.begin(), end = range.end(); it != end; ++it) + *out++ = *it; +} + +template <typename OutputIterator> +void copy(const char *str, OutputIterator out) { + const char *p_curr = str; + while (*p_curr) { + *out++ = *p_curr++; + } +} + +template <typename OutputIterator> +void copy(char ch, OutputIterator out) { + *out++ = ch; +} + +/// Return true value if T has std::string interface, like std::string_view. +template <typename T> +class is_like_std_string { + template <typename U> + static auto check(U *p) -> + decltype(p->find('a'), p->length(), p->data(), int()); + template <typename> + static void check(...); + + public: + static FMT_CONSTEXPR_DECL const bool value = + !std::is_void<decltype(check<T>(FMT_NULL))>::value; +}; + +template <typename Char> +struct is_like_std_string<fmt::basic_string_view<Char>> : std::true_type {}; + +template <typename... Ts> +struct conditional_helper {}; + +template <typename T, typename _ = void> +struct is_range_ : std::false_type {}; + +#if !FMT_MSC_VER || FMT_MSC_VER > 1800 +template <typename T> +struct is_range_<T, typename std::conditional< + false, + conditional_helper<decltype(internal::declval<T>().begin()), + decltype(internal::declval<T>().end())>, + void>::type> : std::true_type {}; +#endif + +/// tuple_size and tuple_element check. +template <typename T> +class is_tuple_like_ { + template <typename U> + static auto check(U *p) -> + decltype(std::tuple_size<U>::value, + internal::declval<typename std::tuple_element<0, U>::type>(), int()); + template <typename> + static void check(...); + + public: + static FMT_CONSTEXPR_DECL const bool value = + !std::is_void<decltype(check<T>(FMT_NULL))>::value; +}; + +// Check for integer_sequence +#if defined(__cpp_lib_integer_sequence) || FMT_MSC_VER >= 1900 +template <typename T, T... N> +using integer_sequence = std::integer_sequence<T, N...>; +template <std::size_t... N> +using index_sequence = std::index_sequence<N...>; +template <std::size_t N> +using make_index_sequence = std::make_index_sequence<N>; +#else +template <typename T, T... N> +struct integer_sequence { + typedef T value_type; + + static FMT_CONSTEXPR std::size_t size() { + return sizeof...(N); + } +}; + +template <std::size_t... N> +using index_sequence = integer_sequence<std::size_t, N...>; + +template <typename T, std::size_t N, T... Ns> +struct make_integer_sequence : make_integer_sequence<T, N - 1, N - 1, Ns...> {}; +template <typename T, T... Ns> +struct make_integer_sequence<T, 0, Ns...> : integer_sequence<T, Ns...> {}; + +template <std::size_t N> +using make_index_sequence = make_integer_sequence<std::size_t, N>; +#endif + +template <class Tuple, class F, size_t... Is> +void for_each(index_sequence<Is...>, Tuple &&tup, F &&f) FMT_NOEXCEPT { + using std::get; + // using free function get<I>(T) now. + const int _[] = {0, ((void)f(get<Is>(tup)), 0)...}; + (void)_; // blocks warnings +} + +template <class T> +FMT_CONSTEXPR make_index_sequence<std::tuple_size<T>::value> +get_indexes(T const &) { return {}; } + +template <class Tuple, class F> +void for_each(Tuple &&tup, F &&f) { + const auto indexes = get_indexes(tup); + for_each(indexes, std::forward<Tuple>(tup), std::forward<F>(f)); +} + +template<typename Arg> +FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const Arg&, + typename std::enable_if< + !is_like_std_string<typename std::decay<Arg>::type>::value>::type* = nullptr) { + return add_space ? " {}" : "{}"; +} + +template<typename Arg> +FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const Arg&, + typename std::enable_if< + is_like_std_string<typename std::decay<Arg>::type>::value>::type* = nullptr) { + return add_space ? " \"{}\"" : "\"{}\""; +} + +FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const char*) { + return add_space ? " \"{}\"" : "\"{}\""; +} +FMT_CONSTEXPR const wchar_t* format_str_quoted(bool add_space, const wchar_t*) { + return add_space ? L" \"{}\"" : L"\"{}\""; +} + +FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const char) { + return add_space ? " '{}'" : "'{}'"; +} +FMT_CONSTEXPR const wchar_t* format_str_quoted(bool add_space, const wchar_t) { + return add_space ? L" '{}'" : L"'{}'"; +} + +} // namespace internal + +template <typename T> +struct is_tuple_like { + static FMT_CONSTEXPR_DECL const bool value = + internal::is_tuple_like_<T>::value && !internal::is_range_<T>::value; +}; + +template <typename TupleT, typename Char> +struct formatter<TupleT, Char, + typename std::enable_if<fmt::is_tuple_like<TupleT>::value>::type> { +private: + // C++11 generic lambda for format() + template <typename FormatContext> + struct format_each { + template <typename T> + void operator()(const T& v) { + if (i > 0) { + if (formatting.add_prepostfix_space) { + *out++ = ' '; + } + internal::copy(formatting.delimiter, out); + } + format_to(out, + internal::format_str_quoted( + (formatting.add_delimiter_spaces && i > 0), v), + v); + ++i; + } + + formatting_tuple<Char>& formatting; + std::size_t& i; + typename std::add_lvalue_reference<decltype(std::declval<FormatContext>().out())>::type out; + }; + +public: + formatting_tuple<Char> formatting; + + template <typename ParseContext> + FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin()) { + return formatting.parse(ctx); + } + + template <typename FormatContext = format_context> + auto format(const TupleT &values, FormatContext &ctx) -> decltype(ctx.out()) { + auto out = ctx.out(); + std::size_t i = 0; + internal::copy(formatting.prefix, out); + + internal::for_each(values, format_each<FormatContext>{formatting, i, out}); + if (formatting.add_prepostfix_space) { + *out++ = ' '; + } + internal::copy(formatting.postfix, out); + + return ctx.out(); + } +}; + +template <typename T> +struct is_range { + static FMT_CONSTEXPR_DECL const bool value = + internal::is_range_<T>::value && !internal::is_like_std_string<T>::value; +}; + +template <typename RangeT, typename Char> +struct formatter<RangeT, Char, + typename std::enable_if<fmt::is_range<RangeT>::value>::type> { + + formatting_range<Char> formatting; + + template <typename ParseContext> + FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin()) { + return formatting.parse(ctx); + } + + template <typename FormatContext> + typename FormatContext::iterator format( + const RangeT &values, FormatContext &ctx) { + auto out = ctx.out(); + internal::copy(formatting.prefix, out); + std::size_t i = 0; + for (auto it = values.begin(), end = values.end(); it != end; ++it) { + if (i > 0) { + if (formatting.add_prepostfix_space) { + *out++ = ' '; + } + internal::copy(formatting.delimiter, out); + } + format_to(out, + internal::format_str_quoted( + (formatting.add_delimiter_spaces && i > 0), *it), + *it); + if (++i > formatting.range_length_limit) { + format_to(out, " ... <other elements>"); + break; + } + } + if (formatting.add_prepostfix_space) { + *out++ = ' '; + } + internal::copy(formatting.postfix, out); + return ctx.out(); + } +}; + +FMT_END_NAMESPACE + +#endif // FMT_RANGES_H_ + diff --git a/src/seastar/fmt/include/fmt/time.h b/src/seastar/fmt/include/fmt/time.h new file mode 100644 index 00000000..b269eda1 --- /dev/null +++ b/src/seastar/fmt/include/fmt/time.h @@ -0,0 +1,161 @@ +// Formatting library for C++ - time formatting +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_TIME_H_ +#define FMT_TIME_H_ + +#include "format.h" +#include <ctime> +#include <locale> + +FMT_BEGIN_NAMESPACE + +// Prevents expansion of a preceding token as a function-style macro. +// Usage: f FMT_NOMACRO() +#define FMT_NOMACRO + +namespace internal{ +inline null<> localtime_r FMT_NOMACRO(...) { return null<>(); } +inline null<> localtime_s(...) { return null<>(); } +inline null<> gmtime_r(...) { return null<>(); } +inline null<> gmtime_s(...) { return null<>(); } +} // namespace internal + +// Thread-safe replacement for std::localtime +inline std::tm localtime(std::time_t time) { + struct dispatcher { + std::time_t time_; + std::tm tm_; + + dispatcher(std::time_t t): time_(t) {} + + bool run() { + using namespace fmt::internal; + return handle(localtime_r(&time_, &tm_)); + } + + bool handle(std::tm *tm) { return tm != FMT_NULL; } + + bool handle(internal::null<>) { + using namespace fmt::internal; + return fallback(localtime_s(&tm_, &time_)); + } + + bool fallback(int res) { return res == 0; } + +#if !FMT_MSC_VER + bool fallback(internal::null<>) { + using namespace fmt::internal; + std::tm *tm = std::localtime(&time_); + if (tm) tm_ = *tm; + return tm != FMT_NULL; + } +#endif + }; + dispatcher lt(time); + // Too big time values may be unsupported. + if (!lt.run()) + FMT_THROW(format_error("time_t value out of range")); + return lt.tm_; +} + +// Thread-safe replacement for std::gmtime +inline std::tm gmtime(std::time_t time) { + struct dispatcher { + std::time_t time_; + std::tm tm_; + + dispatcher(std::time_t t): time_(t) {} + + bool run() { + using namespace fmt::internal; + return handle(gmtime_r(&time_, &tm_)); + } + + bool handle(std::tm *tm) { return tm != FMT_NULL; } + + bool handle(internal::null<>) { + using namespace fmt::internal; + return fallback(gmtime_s(&tm_, &time_)); + } + + bool fallback(int res) { return res == 0; } + +#if !FMT_MSC_VER + bool fallback(internal::null<>) { + std::tm *tm = std::gmtime(&time_); + if (tm) tm_ = *tm; + return tm != FMT_NULL; + } +#endif + }; + dispatcher gt(time); + // Too big time values may be unsupported. + if (!gt.run()) + FMT_THROW(format_error("time_t value out of range")); + return gt.tm_; +} + +namespace internal { +inline std::size_t strftime(char *str, std::size_t count, const char *format, + const std::tm *time) { + return std::strftime(str, count, format, time); +} + +inline std::size_t strftime(wchar_t *str, std::size_t count, + const wchar_t *format, const std::tm *time) { + return std::wcsftime(str, count, format, time); +} +} + +template <typename Char> +struct formatter<std::tm, Char> { + template <typename ParseContext> + auto parse(ParseContext &ctx) -> decltype(ctx.begin()) { + auto it = internal::null_terminating_iterator<Char>(ctx); + if (*it == ':') + ++it; + auto end = it; + while (*end && *end != '}') + ++end; + tm_format.reserve(end - it + 1); + using internal::pointer_from; + tm_format.append(pointer_from(it), pointer_from(end)); + tm_format.push_back('\0'); + return pointer_from(end); + } + + template <typename FormatContext> + auto format(const std::tm &tm, FormatContext &ctx) -> decltype(ctx.out()) { + basic_memory_buffer<Char> buf; + std::size_t start = buf.size(); + for (;;) { + std::size_t size = buf.capacity() - start; + std::size_t count = + internal::strftime(&buf[start], size, &tm_format[0], &tm); + if (count != 0) { + buf.resize(start + count); + break; + } + if (size >= tm_format.size() * 256) { + // If the buffer is 256 times larger than the format string, assume + // that `strftime` gives an empty result. There doesn't seem to be a + // better way to distinguish the two cases: + // https://github.com/fmtlib/fmt/issues/367 + break; + } + const std::size_t MIN_GROWTH = 10; + buf.reserve(buf.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH)); + } + return std::copy(buf.begin(), buf.end(), ctx.out()); + } + + basic_memory_buffer<Char> tm_format; +}; +FMT_END_NAMESPACE + +#endif // FMT_TIME_H_ |