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-rw-r--r--src/fmtlib/fmt/ostream.h209
1 files changed, 209 insertions, 0 deletions
diff --git a/src/fmtlib/fmt/ostream.h b/src/fmtlib/fmt/ostream.h
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+++ b/src/fmtlib/fmt/ostream.h
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+// 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 <fstream> // std::filebuf
+
+#if defined(_WIN32) && defined(__GLIBCXX__)
+# include <ext/stdio_filebuf.h>
+# include <ext/stdio_sync_filebuf.h>
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+# include <__std_stream>
+#endif
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+// Generate a unique explicit instantion in every translation unit using a tag
+// type in an anonymous namespace.
+namespace {
+struct file_access_tag {};
+} // namespace
+template <typename Tag, typename BufType, FILE* BufType::*FileMemberPtr>
+class file_access {
+ friend auto get_file(BufType& obj) -> FILE* { return obj.*FileMemberPtr; }
+};
+
+#if FMT_MSC_VERSION
+template class file_access<file_access_tag, std::filebuf,
+ &std::filebuf::_Myfile>;
+auto get_file(std::filebuf&) -> FILE*;
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+template class file_access<file_access_tag, std::__stdoutbuf<char>,
+ &std::__stdoutbuf<char>::__file_>;
+auto get_file(std::__stdoutbuf<char>&) -> FILE*;
+#endif
+
+inline bool write_ostream_unicode(std::ostream& os, fmt::string_view data) {
+#if FMT_MSC_VERSION
+ if (auto* buf = dynamic_cast<std::filebuf*>(os.rdbuf()))
+ if (FILE* f = get_file(*buf)) return write_console(f, data);
+#elif defined(_WIN32) && defined(__GLIBCXX__)
+ auto* rdbuf = os.rdbuf();
+ FILE* c_file;
+ if (auto* sfbuf = dynamic_cast<__gnu_cxx::stdio_sync_filebuf<char>*>(rdbuf))
+ c_file = sfbuf->file();
+ else if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_filebuf<char>*>(rdbuf))
+ c_file = fbuf->file();
+ else
+ return false;
+ if (c_file) return write_console(c_file, data);
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+ if (auto* buf = dynamic_cast<std::__stdoutbuf<char>*>(os.rdbuf()))
+ if (FILE* f = get_file(*buf)) return write_console(f, data);
+#else
+ ignore_unused(os, data);
+#endif
+ return false;
+}
+inline bool write_ostream_unicode(std::wostream&,
+ fmt::basic_string_view<wchar_t>) {
+ return false;
+}
+
+// Write the content of buf to os.
+// It is a separate function rather than a part of vprint to simplify testing.
+template <typename Char>
+void write_buffer(std::basic_ostream<Char>& os, buffer<Char>& buf) {
+ const Char* buf_data = buf.data();
+ using unsigned_streamsize = std::make_unsigned<std::streamsize>::type;
+ unsigned_streamsize size = buf.size();
+ unsigned_streamsize max_size = to_unsigned(max_value<std::streamsize>());
+ do {
+ unsigned_streamsize n = size <= max_size ? size : max_size;
+ os.write(buf_data, static_cast<std::streamsize>(n));
+ buf_data += n;
+ size -= n;
+ } while (size != 0);
+}
+
+template <typename Char, typename T>
+void format_value(buffer<Char>& buf, const T& value,
+ locale_ref loc = locale_ref()) {
+ auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
+ auto&& output = std::basic_ostream<Char>(&format_buf);
+#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
+ if (loc) output.imbue(loc.get<std::locale>());
+#endif
+ output << value;
+ output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
+}
+
+template <typename T> struct streamed_view { const T& value; };
+
+} // namespace detail
+
+// Formats an object of type T that has an overloaded ostream operator<<.
+template <typename Char>
+struct basic_ostream_formatter : formatter<basic_string_view<Char>, Char> {
+ void set_debug_format() = delete;
+
+ template <typename T, typename OutputIt>
+ auto format(const T& value, basic_format_context<OutputIt, Char>& ctx) const
+ -> OutputIt {
+ auto buffer = basic_memory_buffer<Char>();
+ detail::format_value(buffer, value, ctx.locale());
+ return formatter<basic_string_view<Char>, Char>::format(
+ {buffer.data(), buffer.size()}, ctx);
+ }
+};
+
+using ostream_formatter = basic_ostream_formatter<char>;
+
+template <typename T, typename Char>
+struct formatter<detail::streamed_view<T>, Char>
+ : basic_ostream_formatter<Char> {
+ template <typename OutputIt>
+ auto format(detail::streamed_view<T> view,
+ basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
+ return basic_ostream_formatter<Char>::format(view.value, ctx);
+ }
+};
+
+/**
+ \rst
+ Returns a view that formats `value` via an ostream ``operator<<``.
+
+ **Example**::
+
+ fmt::print("Current thread id: {}\n",
+ fmt::streamed(std::this_thread::get_id()));
+ \endrst
+ */
+template <typename T>
+auto streamed(const T& value) -> detail::streamed_view<T> {
+ return {value};
+}
+
+namespace detail {
+
+inline void vprint_directly(std::ostream& os, string_view format_str,
+ format_args args) {
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, format_str, args);
+ detail::write_buffer(os, buffer);
+}
+
+} // namespace detail
+
+FMT_MODULE_EXPORT template <typename Char>
+void vprint(std::basic_ostream<Char>& os,
+ basic_string_view<type_identity_t<Char>> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+ auto buffer = basic_memory_buffer<Char>();
+ detail::vformat_to(buffer, format_str, args);
+ if (detail::write_ostream_unicode(os, {buffer.data(), buffer.size()})) return;
+ detail::write_buffer(os, buffer);
+}
+
+/**
+ \rst
+ Prints formatted data to the stream *os*.
+
+ **Example**::
+
+ fmt::print(cerr, "Don't {}!", "panic");
+ \endrst
+ */
+FMT_MODULE_EXPORT template <typename... T>
+void print(std::ostream& os, format_string<T...> fmt, T&&... args) {
+ const auto& vargs = fmt::make_format_args(args...);
+ if (detail::is_utf8())
+ vprint(os, fmt, vargs);
+ else
+ detail::vprint_directly(os, fmt, vargs);
+}
+
+FMT_MODULE_EXPORT
+template <typename... Args>
+void print(std::wostream& os,
+ basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
+ Args&&... args) {
+ vprint(os, fmt, fmt::make_format_args<buffer_context<wchar_t>>(args...));
+}
+
+FMT_MODULE_EXPORT template <typename... T>
+void println(std::ostream& os, format_string<T...> fmt, T&&... args) {
+ fmt::print(os, "{}\n", fmt::format(fmt, std::forward<T>(args)...));
+}
+
+FMT_MODULE_EXPORT
+template <typename... Args>
+void println(std::wostream& os,
+ basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
+ Args&&... args) {
+ print(os, L"{}\n", fmt::format(fmt, std::forward<Args>(args)...));
+}
+
+FMT_END_NAMESPACE
+
+#endif // FMT_OSTREAM_H_
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