summaryrefslogtreecommitdiffstats
path: root/mozglue/misc/Printf.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'mozglue/misc/Printf.cpp')
-rw-r--r--mozglue/misc/Printf.cpp1105
1 files changed, 1105 insertions, 0 deletions
diff --git a/mozglue/misc/Printf.cpp b/mozglue/misc/Printf.cpp
new file mode 100644
index 0000000000..10e06ff51c
--- /dev/null
+++ b/mozglue/misc/Printf.cpp
@@ -0,0 +1,1105 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Portable safe sprintf code.
+ *
+ * Author: Kipp E.B. Hickman
+ */
+
+#include "double-conversion/double-to-string.h"
+#include "mozilla/AllocPolicy.h"
+#include "mozilla/Printf.h"
+#include "mozilla/UniquePtrExtensions.h"
+#include "mozilla/Vector.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(XP_WIN)
+# include <windows.h>
+#endif
+
+using double_conversion::DoubleToStringConverter;
+using DTSC = DoubleToStringConverter;
+
+/*
+ * Numbered Argument State
+ */
+struct NumArgState {
+ int type; // type of the current ap
+ va_list ap; // point to the corresponding position on ap
+};
+
+using NumArgStateVector =
+ mozilla::Vector<NumArgState, 20, mozilla::MallocAllocPolicy>;
+
+// For values up to and including TYPE_DOUBLE, the lowest bit indicates
+// whether the type is signed (0) or unsigned (1).
+#define TYPE_SHORT 0
+#define TYPE_USHORT 1
+#define TYPE_INTN 2
+#define TYPE_UINTN 3
+#define TYPE_LONG 4
+#define TYPE_ULONG 5
+#define TYPE_LONGLONG 6
+#define TYPE_ULONGLONG 7
+#define TYPE_DOUBLE 8
+#define TYPE_STRING 9
+#define TYPE_INTSTR 10
+#define TYPE_POINTER 11
+#if defined(XP_WIN)
+# define TYPE_WSTRING 12
+#endif
+#define TYPE_SCHAR 14
+#define TYPE_UCHAR 15
+#define TYPE_UNKNOWN 20
+
+#define FLAG_LEFT 0x1
+#define FLAG_SIGNED 0x2
+#define FLAG_SPACED 0x4
+#define FLAG_ZEROS 0x8
+#define FLAG_NEG 0x10
+
+static const char hex[] = "0123456789abcdef";
+static const char HEX[] = "0123456789ABCDEF";
+
+// Fill into the buffer using the data in src
+bool mozilla::PrintfTarget::fill2(const char* src, int srclen, int width,
+ int flags) {
+ char space = ' ';
+
+ width -= srclen;
+ if (width > 0 && (flags & FLAG_LEFT) == 0) { // Right adjusting
+ if (flags & FLAG_ZEROS) {
+ space = '0';
+ }
+ while (--width >= 0) {
+ if (!emit(&space, 1)) {
+ return false;
+ }
+ }
+ }
+
+ // Copy out the source data
+ if (!emit(src, srclen)) {
+ return false;
+ }
+
+ if (width > 0 && (flags & FLAG_LEFT) != 0) { // Left adjusting
+ while (--width >= 0) {
+ if (!emit(&space, 1)) {
+ return false;
+ }
+ }
+ }
+ return true;
+}
+
+/*
+ * Fill a number. The order is: optional-sign zero-filling conversion-digits
+ */
+bool mozilla::PrintfTarget::fill_n(const char* src, int srclen, int width,
+ int prec, int type, int flags) {
+ int zerowidth = 0;
+ int precwidth = 0;
+ int signwidth = 0;
+ int leftspaces = 0;
+ int rightspaces = 0;
+ int cvtwidth;
+ char sign;
+
+ if ((type & 1) == 0) {
+ if (flags & FLAG_NEG) {
+ sign = '-';
+ signwidth = 1;
+ } else if (flags & FLAG_SIGNED) {
+ sign = '+';
+ signwidth = 1;
+ } else if (flags & FLAG_SPACED) {
+ sign = ' ';
+ signwidth = 1;
+ }
+ }
+ cvtwidth = signwidth + srclen;
+
+ if (prec > 0 && (type != TYPE_DOUBLE)) {
+ if (prec > srclen) {
+ precwidth = prec - srclen; // Need zero filling
+ cvtwidth += precwidth;
+ }
+ }
+
+ if ((flags & FLAG_ZEROS) && ((type == TYPE_DOUBLE) || (prec < 0))) {
+ if (width > cvtwidth) {
+ zerowidth = width - cvtwidth; // Zero filling
+ cvtwidth += zerowidth;
+ }
+ }
+
+ if (flags & FLAG_LEFT) {
+ if (width > cvtwidth) {
+ // Space filling on the right (i.e. left adjusting)
+ rightspaces = width - cvtwidth;
+ }
+ } else {
+ if (width > cvtwidth) {
+ // Space filling on the left (i.e. right adjusting)
+ leftspaces = width - cvtwidth;
+ }
+ }
+ while (--leftspaces >= 0) {
+ if (!emit(" ", 1)) {
+ return false;
+ }
+ }
+ if (signwidth) {
+ if (!emit(&sign, 1)) {
+ return false;
+ }
+ }
+ while (--precwidth >= 0) {
+ if (!emit("0", 1)) {
+ return false;
+ }
+ }
+ while (--zerowidth >= 0) {
+ if (!emit("0", 1)) {
+ return false;
+ }
+ }
+ if (!emit(src, uint32_t(srclen))) {
+ return false;
+ }
+ while (--rightspaces >= 0) {
+ if (!emit(" ", 1)) {
+ return false;
+ }
+ }
+ return true;
+}
+
+// All that the cvt_* functions care about as far as the TYPE_* constants is
+// that the low bit is set to indicate unsigned, or unset to indicate signed.
+// So we don't try to hard to ensure that the passed TYPE_* constant lines
+// up with the actual size of the number being printed here. The main printf
+// code, below, does have to care so that the correct bits are extracted from
+// the varargs list.
+bool mozilla::PrintfTarget::appendIntDec(int32_t num) {
+ int flags = 0;
+ long n = num;
+ if (n < 0) {
+ n = -n;
+ flags |= FLAG_NEG;
+ }
+ return cvt_l(n, -1, -1, 10, TYPE_INTN, flags, hex);
+}
+
+bool mozilla::PrintfTarget::appendIntDec(uint32_t num) {
+ return cvt_l(num, -1, -1, 10, TYPE_UINTN, 0, hex);
+}
+
+bool mozilla::PrintfTarget::appendIntOct(uint32_t num) {
+ return cvt_l(num, -1, -1, 8, TYPE_UINTN, 0, hex);
+}
+
+bool mozilla::PrintfTarget::appendIntHex(uint32_t num) {
+ return cvt_l(num, -1, -1, 16, TYPE_UINTN, 0, hex);
+}
+
+bool mozilla::PrintfTarget::appendIntDec(int64_t num) {
+ int flags = 0;
+ if (num < 0) {
+ num = -num;
+ flags |= FLAG_NEG;
+ }
+ return cvt_ll(num, -1, -1, 10, TYPE_INTN, flags, hex);
+}
+
+bool mozilla::PrintfTarget::appendIntDec(uint64_t num) {
+ return cvt_ll(num, -1, -1, 10, TYPE_UINTN, 0, hex);
+}
+
+bool mozilla::PrintfTarget::appendIntOct(uint64_t num) {
+ return cvt_ll(num, -1, -1, 8, TYPE_UINTN, 0, hex);
+}
+
+bool mozilla::PrintfTarget::appendIntHex(uint64_t num) {
+ return cvt_ll(num, -1, -1, 16, TYPE_UINTN, 0, hex);
+}
+
+/* Convert a long into its printable form. */
+bool mozilla::PrintfTarget::cvt_l(long num, int width, int prec, int radix,
+ int type, int flags, const char* hexp) {
+ char cvtbuf[100];
+ char* cvt;
+ int digits;
+
+ // according to the man page this needs to happen
+ if ((prec == 0) && (num == 0)) {
+ return fill_n("", 0, width, prec, type, flags);
+ }
+
+ // Converting decimal is a little tricky. In the unsigned case we
+ // need to stop when we hit 10 digits. In the signed case, we can
+ // stop when the number is zero.
+ cvt = cvtbuf + sizeof(cvtbuf);
+ digits = 0;
+ while (num) {
+ int digit = (((unsigned long)num) % radix) & 0xF;
+ *--cvt = hexp[digit];
+ digits++;
+ num = (long)(((unsigned long)num) / radix);
+ }
+ if (digits == 0) {
+ *--cvt = '0';
+ digits++;
+ }
+
+ // Now that we have the number converted without its sign, deal with
+ // the sign and zero padding.
+ return fill_n(cvt, digits, width, prec, type, flags);
+}
+
+/* Convert a 64-bit integer into its printable form. */
+bool mozilla::PrintfTarget::cvt_ll(int64_t num, int width, int prec, int radix,
+ int type, int flags, const char* hexp) {
+ // According to the man page, this needs to happen.
+ if (prec == 0 && num == 0) {
+ return fill_n("", 0, width, prec, type, flags);
+ }
+
+ // Converting decimal is a little tricky. In the unsigned case we
+ // need to stop when we hit 10 digits. In the signed case, we can
+ // stop when the number is zero.
+ int64_t rad = int64_t(radix);
+ char cvtbuf[100];
+ char* cvt = cvtbuf + sizeof(cvtbuf);
+ int digits = 0;
+ while (num != 0) {
+ int64_t quot = uint64_t(num) / rad;
+ int64_t rem = uint64_t(num) % rad;
+ int32_t digit = int32_t(rem);
+ *--cvt = hexp[digit & 0xf];
+ digits++;
+ num = quot;
+ }
+ if (digits == 0) {
+ *--cvt = '0';
+ digits++;
+ }
+
+ // Now that we have the number converted without its sign, deal with
+ // the sign and zero padding.
+ return fill_n(cvt, digits, width, prec, type, flags);
+}
+
+template <size_t N>
+constexpr static size_t lengthof(const char (&)[N]) {
+ return N - 1;
+}
+
+// Longest possible output from ToFixed for positive numbers:
+// [0-9]{kMaxFixedDigitsBeforePoint}\.[0-9]{kMaxFixedDigitsAfterPoint}?
+constexpr int FIXED_MAX_CHARS =
+ DTSC::kMaxFixedDigitsBeforePoint + 1 + DTSC::kMaxFixedDigitsAfterPoint;
+
+// Longest possible output from ToExponential:
+// [1-9]\.[0-9]{kMaxExponentialDigits}e[+-][0-9]{1,3}
+// (std::numeric_limits<double>::max() has exponent 308).
+constexpr int EXPONENTIAL_MAX_CHARS =
+ lengthof("1.") + DTSC::kMaxExponentialDigits + lengthof("e+999");
+
+// Longest possible output from ToPrecise:
+// [0-9\.]{kMaxPrecisionDigits+1} or
+// [1-9]\.[0-9]{kMaxPrecisionDigits-1}e[+-][0-9]{1,3}
+constexpr int PRECISE_MAX_CHARS =
+ lengthof("1.") + DTSC::kMaxPrecisionDigits - 1 + lengthof("e+999");
+
+constexpr int DTSC_MAX_CHARS =
+ std::max({FIXED_MAX_CHARS, EXPONENTIAL_MAX_CHARS, PRECISE_MAX_CHARS});
+
+/*
+ * Convert a double precision floating point number into its printable
+ * form.
+ */
+bool mozilla::PrintfTarget::cvt_f(double d, char c, int width, int prec,
+ int flags) {
+ bool lower = islower(c);
+ const char* inf = lower ? "inf" : "INF";
+ const char* nan = lower ? "nan" : "NAN";
+ char e = lower ? 'e' : 'E';
+ DoubleToStringConverter converter(DTSC::UNIQUE_ZERO | DTSC::NO_TRAILING_ZERO |
+ DTSC::EMIT_POSITIVE_EXPONENT_SIGN,
+ inf, nan, e, 0, 0, 4, 0, 2);
+ // Longest of the above cases, plus space for a terminal nul character.
+ char buf[DTSC_MAX_CHARS + 1];
+ double_conversion::StringBuilder builder(buf, sizeof(buf));
+ bool success = false;
+ if (std::signbit(d)) {
+ d = std::abs(d);
+ flags |= FLAG_NEG;
+ }
+ if (!std::isfinite(d)) {
+ flags &= ~FLAG_ZEROS;
+ }
+ // "If the precision is missing, it shall be taken as 6."
+ if (prec < 0) {
+ prec = 6;
+ }
+ switch (c) {
+ case 'e':
+ case 'E':
+ success = converter.ToExponential(d, prec, &builder);
+ break;
+ case 'f':
+ case 'F':
+ success = converter.ToFixed(d, prec, &builder);
+ break;
+ case 'g':
+ case 'G':
+ // "If an explicit precision is zero, it shall be taken as 1."
+ success = converter.ToPrecision(d, prec ? prec : 1, &builder);
+ break;
+ }
+ if (!success) {
+ return false;
+ }
+ int len = builder.position();
+ char* cvt = builder.Finalize();
+ return fill_n(cvt, len, width, prec, TYPE_DOUBLE, flags);
+}
+
+/*
+ * Convert a string into its printable form. "width" is the output
+ * width. "prec" is the maximum number of characters of "s" to output,
+ * where -1 means until NUL.
+ */
+bool mozilla::PrintfTarget::cvt_s(const char* s, int width, int prec,
+ int flags) {
+ if (prec == 0) {
+ return true;
+ }
+ if (!s) {
+ s = "(null)";
+ }
+
+ // Limit string length by precision value
+ int slen = int(strlen(s));
+ if (0 < prec && prec < slen) {
+ slen = prec;
+ }
+
+ // and away we go
+ return fill2(s, slen, width, flags);
+}
+
+/*
+ * BuildArgArray stands for Numbered Argument list Sprintf
+ * for example,
+ * fmp = "%4$i, %2$d, %3s, %1d";
+ * the number must start from 1, and no gap among them
+ */
+static bool BuildArgArray(const char* fmt, va_list ap, NumArgStateVector& nas) {
+ size_t number = 0, cn = 0, i;
+ const char* p;
+ char c;
+
+ // First pass:
+ // Detemine how many legal % I have got, then allocate space.
+
+ p = fmt;
+ i = 0;
+ while ((c = *p++) != 0) {
+ if (c != '%') {
+ continue;
+ }
+ if ((c = *p++) == '%') { // skip %% case
+ continue;
+ }
+
+ while (c != 0) {
+ if (c > '9' || c < '0') {
+ if (c == '$') { // numbered argument case
+ if (i > 0) {
+ MOZ_CRASH("Bad format string");
+ }
+ number++;
+ } else { // non-numbered argument case
+ if (number > 0) {
+ MOZ_CRASH("Bad format string");
+ }
+ i = 1;
+ }
+ break;
+ }
+
+ c = *p++;
+ }
+ }
+
+ if (number == 0) {
+ return true;
+ }
+
+ // Only allow a limited number of arguments.
+ MOZ_RELEASE_ASSERT(number <= 20);
+
+ if (!nas.growByUninitialized(number)) {
+ return false;
+ }
+
+ for (i = 0; i < number; i++) {
+ nas[i].type = TYPE_UNKNOWN;
+ }
+
+ // Second pass:
+ // Set nas[].type.
+
+ p = fmt;
+ while ((c = *p++) != 0) {
+ if (c != '%') {
+ continue;
+ }
+ c = *p++;
+ if (c == '%') {
+ continue;
+ }
+
+ cn = 0;
+ while (c && c != '$') { // should improve error check later
+ cn = cn * 10 + c - '0';
+ c = *p++;
+ }
+
+ if (!c || cn < 1 || cn > number) {
+ MOZ_CRASH("Bad format string");
+ }
+
+ // nas[cn] starts from 0, and make sure nas[cn].type is not assigned.
+ cn--;
+ if (nas[cn].type != TYPE_UNKNOWN) {
+ continue;
+ }
+
+ c = *p++;
+
+ // flags
+ while ((c == '-') || (c == '+') || (c == ' ') || (c == '0')) {
+ c = *p++;
+ }
+
+ // width
+ if (c == '*') {
+ // not supported feature, for the argument is not numbered
+ MOZ_CRASH("Bad format string");
+ }
+
+ while ((c >= '0') && (c <= '9')) {
+ c = *p++;
+ }
+
+ // precision
+ if (c == '.') {
+ c = *p++;
+ if (c == '*') {
+ // not supported feature, for the argument is not numbered
+ MOZ_CRASH("Bad format string");
+ }
+
+ while ((c >= '0') && (c <= '9')) {
+ c = *p++;
+ }
+ }
+
+ // size
+ nas[cn].type = TYPE_INTN;
+ if (c == 'h') {
+ nas[cn].type = TYPE_SHORT;
+ c = *p++;
+ if (c == 'h') {
+ nas[cn].type = TYPE_SCHAR;
+ c = *p++;
+ }
+ } else if (c == 'L') {
+ nas[cn].type = TYPE_LONGLONG;
+ c = *p++;
+ } else if (c == 'l') {
+ nas[cn].type = TYPE_LONG;
+ c = *p++;
+ if (c == 'l') {
+ nas[cn].type = TYPE_LONGLONG;
+ c = *p++;
+ }
+ } else if (c == 'z' || c == 'I') {
+ static_assert(sizeof(size_t) == sizeof(int) ||
+ sizeof(size_t) == sizeof(long) ||
+ sizeof(size_t) == sizeof(long long),
+ "size_t is not one of the expected sizes");
+ nas[cn].type = sizeof(size_t) == sizeof(int) ? TYPE_INTN
+ : sizeof(size_t) == sizeof(long) ? TYPE_LONG
+ : TYPE_LONGLONG;
+ c = *p++;
+ } else if (c == 't') {
+ static_assert(sizeof(ptrdiff_t) == sizeof(int) ||
+ sizeof(ptrdiff_t) == sizeof(long) ||
+ sizeof(ptrdiff_t) == sizeof(long long),
+ "ptrdiff_t is not one of the expected sizes");
+ nas[cn].type = sizeof(ptrdiff_t) == sizeof(int) ? TYPE_INTN
+ : sizeof(ptrdiff_t) == sizeof(long) ? TYPE_LONG
+ : TYPE_LONGLONG;
+ c = *p++;
+ } else if (c == 'j') {
+ static_assert(sizeof(intmax_t) == sizeof(int) ||
+ sizeof(intmax_t) == sizeof(long) ||
+ sizeof(intmax_t) == sizeof(long long),
+ "intmax_t is not one of the expected sizes");
+ nas[cn].type = sizeof(intmax_t) == sizeof(int) ? TYPE_INTN
+ : sizeof(intmax_t) == sizeof(long) ? TYPE_LONG
+ : TYPE_LONGLONG;
+ c = *p++;
+ }
+
+ // format
+ switch (c) {
+ case 'd':
+ case 'c':
+ case 'i':
+ break;
+
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X':
+ // Mark as unsigned type.
+ nas[cn].type |= 1;
+ break;
+
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'F':
+ case 'g':
+ case 'G':
+ nas[cn].type = TYPE_DOUBLE;
+ break;
+
+ case 'p':
+ nas[cn].type = TYPE_POINTER;
+ break;
+
+ case 'S':
+#if defined(XP_WIN)
+ nas[cn].type = TYPE_WSTRING;
+#else
+ MOZ_ASSERT(0);
+ nas[cn].type = TYPE_UNKNOWN;
+#endif
+ break;
+
+ case 's':
+#if defined(XP_WIN)
+ if (nas[cn].type == TYPE_LONG) {
+ nas[cn].type = TYPE_WSTRING;
+ break;
+ }
+#endif
+ // Other type sizes are not supported here.
+ MOZ_ASSERT(nas[cn].type == TYPE_INTN);
+ nas[cn].type = TYPE_STRING;
+ break;
+
+ case 'n':
+ nas[cn].type = TYPE_INTSTR;
+ break;
+
+ default:
+ MOZ_ASSERT(0);
+ nas[cn].type = TYPE_UNKNOWN;
+ break;
+ }
+
+ // get a legal para.
+ if (nas[cn].type == TYPE_UNKNOWN) {
+ MOZ_CRASH("Bad format string");
+ }
+ }
+
+ // Third pass:
+ // Fill nas[].ap.
+
+ cn = 0;
+ while (cn < number) {
+ // A TYPE_UNKNOWN here means that the format asked for a
+ // positional argument without specifying the meaning of some
+ // earlier argument.
+ MOZ_ASSERT(nas[cn].type != TYPE_UNKNOWN);
+
+ va_copy(nas[cn].ap, ap);
+
+ switch (nas[cn].type) {
+ case TYPE_SCHAR:
+ case TYPE_UCHAR:
+ case TYPE_SHORT:
+ case TYPE_USHORT:
+ case TYPE_INTN:
+ case TYPE_UINTN:
+ (void)va_arg(ap, int);
+ break;
+ case TYPE_LONG:
+ (void)va_arg(ap, long);
+ break;
+ case TYPE_ULONG:
+ (void)va_arg(ap, unsigned long);
+ break;
+ case TYPE_LONGLONG:
+ (void)va_arg(ap, long long);
+ break;
+ case TYPE_ULONGLONG:
+ (void)va_arg(ap, unsigned long long);
+ break;
+ case TYPE_STRING:
+ (void)va_arg(ap, char*);
+ break;
+ case TYPE_INTSTR:
+ (void)va_arg(ap, int*);
+ break;
+ case TYPE_DOUBLE:
+ (void)va_arg(ap, double);
+ break;
+ case TYPE_POINTER:
+ (void)va_arg(ap, void*);
+ break;
+#if defined(XP_WIN)
+ case TYPE_WSTRING:
+ (void)va_arg(ap, wchar_t*);
+ break;
+#endif
+
+ default:
+ MOZ_CRASH();
+ }
+
+ cn++;
+ }
+
+ return true;
+}
+
+mozilla::PrintfTarget::PrintfTarget() : mEmitted(0) {}
+
+bool mozilla::PrintfTarget::vprint(const char* fmt, va_list ap) {
+ char c;
+ int flags, width, prec, radix, type;
+ union {
+ char ch;
+ int i;
+ long l;
+ long long ll;
+ double d;
+ const char* s;
+ int* ip;
+ void* p;
+#if defined(XP_WIN)
+ const wchar_t* ws;
+#endif
+ } u{};
+ const char* hexp;
+ int i;
+
+ // Build an argument array, IF the fmt is numbered argument
+ // list style, to contain the Numbered Argument list pointers.
+
+ NumArgStateVector nas;
+ if (!BuildArgArray(fmt, ap, nas)) {
+ // the fmt contains error Numbered Argument format, jliu@netscape.com
+ MOZ_CRASH("Bad format string");
+ }
+
+ while ((c = *fmt++) != 0) {
+ if (c != '%') {
+ if (!emit(fmt - 1, 1)) {
+ return false;
+ }
+
+ continue;
+ }
+
+ // Gobble up the % format string. Hopefully we have handled all
+ // of the strange cases!
+ flags = 0;
+ c = *fmt++;
+ if (c == '%') {
+ // quoting a % with %%
+ if (!emit(fmt - 1, 1)) {
+ return false;
+ }
+
+ continue;
+ }
+
+ if (!nas.empty()) {
+ // the fmt contains the Numbered Arguments feature
+ i = 0;
+ while (c && c != '$') { // should improve error check later
+ i = (i * 10) + (c - '0');
+ c = *fmt++;
+ }
+
+ if (nas[i - 1].type == TYPE_UNKNOWN) {
+ MOZ_CRASH("Bad format string");
+ }
+
+ ap = nas[i - 1].ap;
+ c = *fmt++;
+ }
+
+ // Examine optional flags. Note that we do not implement the
+ // '#' flag of sprintf(). The ANSI C spec. of the '#' flag is
+ // somewhat ambiguous and not ideal, which is perhaps why
+ // the various sprintf() implementations are inconsistent
+ // on this feature.
+ while ((c == '-') || (c == '+') || (c == ' ') || (c == '0')) {
+ if (c == '-') {
+ flags |= FLAG_LEFT;
+ }
+ if (c == '+') {
+ flags |= FLAG_SIGNED;
+ }
+ if (c == ' ') {
+ flags |= FLAG_SPACED;
+ }
+ if (c == '0') {
+ flags |= FLAG_ZEROS;
+ }
+ c = *fmt++;
+ }
+ if (flags & FLAG_SIGNED) {
+ flags &= ~FLAG_SPACED;
+ }
+ if (flags & FLAG_LEFT) {
+ flags &= ~FLAG_ZEROS;
+ }
+
+ // width
+ if (c == '*') {
+ c = *fmt++;
+ width = va_arg(ap, int);
+ if (width < 0) {
+ width = -width;
+ flags |= FLAG_LEFT;
+ flags &= ~FLAG_ZEROS;
+ }
+ } else {
+ width = 0;
+ while ((c >= '0') && (c <= '9')) {
+ width = (width * 10) + (c - '0');
+ c = *fmt++;
+ }
+ }
+
+ // precision
+ prec = -1;
+ if (c == '.') {
+ c = *fmt++;
+ if (c == '*') {
+ c = *fmt++;
+ prec = va_arg(ap, int);
+ } else {
+ prec = 0;
+ while ((c >= '0') && (c <= '9')) {
+ prec = (prec * 10) + (c - '0');
+ c = *fmt++;
+ }
+ }
+ }
+
+ // size
+ type = TYPE_INTN;
+ if (c == 'h') {
+ type = TYPE_SHORT;
+ c = *fmt++;
+ if (c == 'h') {
+ type = TYPE_SCHAR;
+ c = *fmt++;
+ }
+ } else if (c == 'L') {
+ type = TYPE_LONGLONG;
+ c = *fmt++;
+ } else if (c == 'l') {
+ type = TYPE_LONG;
+ c = *fmt++;
+ if (c == 'l') {
+ type = TYPE_LONGLONG;
+ c = *fmt++;
+ }
+ } else if (c == 'z' || c == 'I') {
+ static_assert(sizeof(size_t) == sizeof(int) ||
+ sizeof(size_t) == sizeof(long) ||
+ sizeof(size_t) == sizeof(long long),
+ "size_t is not one of the expected sizes");
+ type = sizeof(size_t) == sizeof(int) ? TYPE_INTN
+ : sizeof(size_t) == sizeof(long) ? TYPE_LONG
+ : TYPE_LONGLONG;
+ c = *fmt++;
+ } else if (c == 't') {
+ static_assert(sizeof(ptrdiff_t) == sizeof(int) ||
+ sizeof(ptrdiff_t) == sizeof(long) ||
+ sizeof(ptrdiff_t) == sizeof(long long),
+ "ptrdiff_t is not one of the expected sizes");
+ type = sizeof(ptrdiff_t) == sizeof(int) ? TYPE_INTN
+ : sizeof(ptrdiff_t) == sizeof(long) ? TYPE_LONG
+ : TYPE_LONGLONG;
+ c = *fmt++;
+ } else if (c == 'j') {
+ static_assert(sizeof(intmax_t) == sizeof(int) ||
+ sizeof(intmax_t) == sizeof(long) ||
+ sizeof(intmax_t) == sizeof(long long),
+ "intmax_t is not one of the expected sizes");
+ type = sizeof(intmax_t) == sizeof(int) ? TYPE_INTN
+ : sizeof(intmax_t) == sizeof(long) ? TYPE_LONG
+ : TYPE_LONGLONG;
+ c = *fmt++;
+ }
+
+ // format
+ hexp = hex;
+ switch (c) {
+ case 'd':
+ case 'i': // decimal/integer
+ radix = 10;
+ goto fetch_and_convert;
+
+ case 'o': // octal
+ radix = 8;
+ type |= 1;
+ goto fetch_and_convert;
+
+ case 'u': // unsigned decimal
+ radix = 10;
+ type |= 1;
+ goto fetch_and_convert;
+
+ case 'x': // unsigned hex
+ radix = 16;
+ type |= 1;
+ goto fetch_and_convert;
+
+ case 'X': // unsigned HEX
+ radix = 16;
+ hexp = HEX;
+ type |= 1;
+ goto fetch_and_convert;
+
+ fetch_and_convert:
+ switch (type) {
+ case TYPE_SCHAR:
+ u.l = (signed char)va_arg(ap, int);
+ if (u.l < 0) {
+ u.l = -u.l;
+ flags |= FLAG_NEG;
+ }
+ goto do_long;
+ case TYPE_UCHAR:
+ u.l = (unsigned char)va_arg(ap, unsigned int);
+ goto do_long;
+ case TYPE_SHORT:
+ u.l = (short)va_arg(ap, int);
+ if (u.l < 0) {
+ u.l = -u.l;
+ flags |= FLAG_NEG;
+ }
+ goto do_long;
+ case TYPE_USHORT:
+ u.l = (unsigned short)va_arg(ap, unsigned int);
+ goto do_long;
+ case TYPE_INTN:
+ u.l = va_arg(ap, int);
+ if (u.l < 0) {
+ u.l = -u.l;
+ flags |= FLAG_NEG;
+ }
+ goto do_long;
+ case TYPE_UINTN:
+ u.l = (long)va_arg(ap, unsigned int);
+ goto do_long;
+
+ case TYPE_LONG:
+ u.l = va_arg(ap, long);
+ if (u.l < 0) {
+ u.l = -u.l;
+ flags |= FLAG_NEG;
+ }
+ goto do_long;
+ case TYPE_ULONG:
+ u.l = (long)va_arg(ap, unsigned long);
+ do_long:
+ if (!cvt_l(u.l, width, prec, radix, type, flags, hexp)) {
+ return false;
+ }
+
+ break;
+
+ case TYPE_LONGLONG:
+ u.ll = va_arg(ap, long long);
+ if (u.ll < 0) {
+ u.ll = -u.ll;
+ flags |= FLAG_NEG;
+ }
+ goto do_longlong;
+ case TYPE_POINTER:
+ u.ll = (uintptr_t)va_arg(ap, void*);
+ goto do_longlong;
+ case TYPE_ULONGLONG:
+ u.ll = va_arg(ap, unsigned long long);
+ do_longlong:
+ if (!cvt_ll(u.ll, width, prec, radix, type, flags, hexp)) {
+ return false;
+ }
+
+ break;
+ }
+ break;
+
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'F':
+ case 'g':
+ case 'G':
+ u.d = va_arg(ap, double);
+ if (!cvt_f(u.d, c, width, prec, flags)) {
+ return false;
+ }
+
+ break;
+
+ case 'c':
+ if ((flags & FLAG_LEFT) == 0) {
+ while (width-- > 1) {
+ if (!emit(" ", 1)) {
+ return false;
+ }
+ }
+ }
+ switch (type) {
+ case TYPE_SHORT:
+ case TYPE_INTN:
+ u.ch = va_arg(ap, int);
+ if (!emit(&u.ch, 1)) {
+ return false;
+ }
+ break;
+ }
+ if (flags & FLAG_LEFT) {
+ while (width-- > 1) {
+ if (!emit(" ", 1)) {
+ return false;
+ }
+ }
+ }
+ break;
+
+ case 'p':
+ type = TYPE_POINTER;
+ radix = 16;
+ goto fetch_and_convert;
+
+ case 's':
+ if (type == TYPE_INTN) {
+ u.s = va_arg(ap, const char*);
+ if (!cvt_s(u.s, width, prec, flags)) {
+ return false;
+ }
+ break;
+ }
+ MOZ_ASSERT(type == TYPE_LONG);
+ [[fallthrough]];
+ case 'S':
+#if defined(XP_WIN)
+ {
+ u.ws = va_arg(ap, const wchar_t*);
+
+ int rv = WideCharToMultiByte(CP_ACP, 0, u.ws, -1, NULL, 0, NULL, NULL);
+ if (rv == 0 && GetLastError() == ERROR_NO_UNICODE_TRANSLATION) {
+ if (!cvt_s("<unicode errors in string>", width, prec, flags)) {
+ return false;
+ }
+ } else {
+ if (rv == 0) {
+ rv = 1;
+ }
+ UniqueFreePtr<char[]> buf((char*)malloc(rv));
+ WideCharToMultiByte(CP_ACP, 0, u.ws, -1, buf.get(), rv, NULL, NULL);
+ buf[rv - 1] = '\0';
+
+ if (!cvt_s(buf.get(), width, prec, flags)) {
+ return false;
+ }
+ }
+ }
+#else
+ // Not supported here.
+ MOZ_ASSERT(0);
+#endif
+ break;
+
+ case 'n':
+ u.ip = va_arg(ap, int*);
+ if (u.ip) {
+ *u.ip = mEmitted;
+ }
+ break;
+
+ default:
+ // Not a % token after all... skip it
+ if (!emit("%", 1)) {
+ return false;
+ }
+ if (!emit(fmt - 1, 1)) {
+ return false;
+ }
+ }
+ }
+
+ return true;
+}
+
+/************************************************************************/
+
+bool mozilla::PrintfTarget::print(const char* format, ...) {
+ va_list ap;
+
+ va_start(ap, format);
+ bool result = vprint(format, ap);
+ va_end(ap);
+ return result;
+}
+
+#undef TYPE_SHORT
+#undef TYPE_USHORT
+#undef TYPE_INTN
+#undef TYPE_UINTN
+#undef TYPE_LONG
+#undef TYPE_ULONG
+#undef TYPE_LONGLONG
+#undef TYPE_ULONGLONG
+#undef TYPE_STRING
+#undef TYPE_DOUBLE
+#undef TYPE_INTSTR
+#undef TYPE_POINTER
+#undef TYPE_WSTRING
+#undef TYPE_UNKNOWN
+#undef TYPE_SCHAR
+#undef TYPE_UCHAR
+
+#undef FLAG_LEFT
+#undef FLAG_SIGNED
+#undef FLAG_SPACED
+#undef FLAG_ZEROS
+#undef FLAG_NEG
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 10:02:58 +0000