fmt: update bundled fmt to 3.0.1 (7fa8f8f)

Signed-off-by: Damien Zammit <damien@zamaudio.com>

include/spdlog/fmt/bundled/ostream.cc

@@ -1,37 +1,43 @@
 /*
-Formatting library for C++ - std::ostream support
+ Formatting library for C++ - std::ostream support
 
-Copyright (c) 2012 - 2016, Victor Zverovich
-All rights reserved.
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
 
-For the license information refer to format.h.
-*/
+ For the license information refer to format.h.
+ */
 
 #include "ostream.h"
 
 namespace fmt {
 
-	namespace internal {
-		FMT_FUNC void write(std::ostream &os, Writer &w)
-		{
-			const char *data = w.data();
-			typedef internal::MakeUnsigned<std::streamsize>::Type UnsignedStreamSize;
-			UnsignedStreamSize size = w.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);
-		}
-	}
+namespace {
+// Write the content of w to os.
+void write(std::ostream &os, Writer &w) {
+  const char *data = w.data();
+  typedef internal::MakeUnsigned<std::streamsize>::Type UnsignedStreamSize;
+  UnsignedStreamSize size = w.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);
+}
+}
 
-	FMT_FUNC void print(std::ostream &os, CStringRef format_str, ArgList args)
-	{
-		MemoryWriter w;
-		w.write(format_str, args);
-		internal::write(os, w);
-	}
+FMT_FUNC void print(std::ostream &os, CStringRef format_str, ArgList args) {
+  MemoryWriter w;
+  w.write(format_str, args);
+  write(os, w);
+}
+
+FMT_FUNC int fprintf(std::ostream &os, CStringRef format, ArgList args) {
+  MemoryWriter w;
+  printf(w, format, args);
+  write(os, w);
+  return static_cast<int>(w.size());
+}
 }  // namespace fmt

include/spdlog/fmt/bundled/ostream.h

@@ -1,114 +1,111 @@
 /*
-Formatting library for C++ - std::ostream support
+ Formatting library for C++ - std::ostream support
 
-Copyright (c) 2012 - 2016, Victor Zverovich
-All rights reserved.
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
 
-For the license information refer to format.h.
-*/
+ For the license information refer to format.h.
+ */
 
 #ifndef FMT_OSTREAM_H_
 #define FMT_OSTREAM_H_
 
-// commented out by spdlog
-// #include "format.h"
+#include "format.h"
 #include <ostream>
 
-namespace fmt
-{
+namespace fmt {
 
-namespace internal
-{
+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;
+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;
 
-    Buffer<Char> &buffer_;
-    Char *start_;
+  Buffer<Char> &buffer_;
+  Char *start_;
 
-public:
-    FormatBuf(Buffer<Char> &buffer): buffer_(buffer), start_(&buffer[0])
-    {
-        this->setp(start_, start_ + buffer_.capacity());
+ public:
+  FormatBuf(Buffer<Char> &buffer) : buffer_(buffer), start_(&buffer[0]) {
+    this->setp(start_, start_ + buffer_.capacity());
+  }
+
+  int_type overflow(int_type ch = traits_type::eof()) {
+    if (!traits_type::eq_int_type(ch, traits_type::eof())) {
+      size_t buf_size = size();
+      buffer_.resize(buf_size);
+      buffer_.reserve(buf_size * 2);
+
+      start_ = &buffer_[0];
+      start_[buf_size] = traits_type::to_char_type(ch);
+      this->setp(start_+ buf_size + 1, start_ + buf_size * 2);
     }
+    return ch;
+  }
 
-    int_type overflow(int_type ch = traits_type::eof())
-    {
-        if (!traits_type::eq_int_type(ch, traits_type::eof()))
-        {
-            size_t buf_size = size();
-            buffer_.resize(buf_size);
-            buffer_.reserve(buf_size * 2);
-
-            start_ = &buffer_[0];
-            start_[buf_size] = traits_type::to_char_type(ch);
-            this->setp(start_ + buf_size + 1, start_ + buf_size * 2);
-        }
-        return ch;
-    }
-
-    size_t size() const
-    {
-        return to_unsigned(this->pptr() - start_);
-    }
+  size_t size() const {
+    return to_unsigned(this->pptr() - start_);
+  }
 };
 
 Yes &convert(std::ostream &);
 
-struct DummyStream: std::ostream
-{
-    DummyStream();  // Suppress a bogus warning in MSVC.
-    // Hide all operator<< overloads from std::ostream.
-    void operator<<(Null<>);
+struct DummyStream : std::ostream {
+  DummyStream();  // Suppress a bogus warning in MSVC.
+  // Hide all operator<< overloads from std::ostream.
+  void operator<<(Null<>);
 };
 
 No &operator<<(std::ostream &, int);
 
 template<typename T>
-struct ConvertToIntImpl<T, true>
-{
-    // Convert to int only if T doesn't have an overloaded operator<<.
-    enum
-    {
-        value = sizeof(convert(get<DummyStream>() << get<T>())) == sizeof(No)
-    };
+struct ConvertToIntImpl<T, true> {
+  // Convert to int only if T doesn't have an overloaded operator<<.
+  enum {
+    value = sizeof(convert(get<DummyStream>() << get<T>())) == sizeof(No)
+  };
 };
-
-// Write the content of w to os.
-void write(std::ostream &os, Writer &w);
 }  // namespace internal
 
 // Formats a value.
 template <typename Char, typename ArgFormatter, typename T>
-void format_arg(BasicFormatter<Char, ArgFormatter> &f,
-                const Char *&format_str, const T &value)
-{
-    internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE> buffer;
+void format(BasicFormatter<Char, ArgFormatter> &f,
+            const Char *&format_str, const T &value) {
+  internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE> buffer;
 
-    internal::FormatBuf<Char> format_buf(buffer);
-    std::basic_ostream<Char> output(&format_buf);
-    output << value;
+  internal::FormatBuf<Char> format_buf(buffer);
+  std::basic_ostream<Char> output(&format_buf);
+  output << value;
 
-    BasicStringRef<Char> str(&buffer[0], format_buf.size());
-    typedef internal::MakeArg< BasicFormatter<Char> > MakeArg;
-    format_str = f.format(format_str, MakeArg(str));
+  BasicStringRef<Char> str(&buffer[0], format_buf.size());
+  typedef internal::MakeArg< BasicFormatter<Char> > MakeArg;
+  format_str = f.format(format_str, MakeArg(str));
 }
 
 /**
-\rst
-Prints formatted data to the stream *os*.
+  \rst
+  Prints formatted data to the stream *os*.
 
-**Example**::
+  **Example**::
 
-print(cerr, "Don't {}!", "panic");
-\endrst
-*/
+    print(cerr, "Don't {}!", "panic");
+  \endrst
+ */
 FMT_API void print(std::ostream &os, CStringRef format_str, ArgList args);
 FMT_VARIADIC(void, print, std::ostream &, CStringRef)
+
+/**
+  \rst
+  Prints formatted data to the stream *os*.
+
+  **Example**::
+
+    fprintf(cerr, "Don't %s!", "panic");
+  \endrst
+ */
+FMT_API int fprintf(std::ostream &os, CStringRef format_str, ArgList args);
+FMT_VARIADIC(int, fprintf, std::ostream &, CStringRef)
 }  // namespace fmt
 
 #ifdef FMT_HEADER_ONLY

include/spdlog/fmt/bundled/posix.cc

@@ -0,0 +1,238 @@
+/*
+ A C++ interface to POSIX functions.
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+// Disable bogus MSVC warnings.
+#ifndef _CRT_SECURE_NO_WARNINGS
+# define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include "posix.h"
+
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifndef _WIN32
+# include <unistd.h>
+#else
+# include <windows.h>
+# include <io.h>
+
+# define O_CREAT _O_CREAT
+# define O_TRUNC _O_TRUNC
+
+# ifndef S_IRUSR
+#  define S_IRUSR _S_IREAD
+# endif
+
+# ifndef S_IWUSR
+#  define S_IWUSR _S_IWRITE
+# endif
+
+# ifdef __MINGW32__
+#  define _SH_DENYNO 0x40
+# endif
+
+#endif  // _WIN32
+
+#ifdef fileno
+# undef fileno
+#endif
+
+namespace {
+#ifdef _WIN32
+// Return type of read and write functions.
+typedef int RWResult;
+
+// On Windows the count argument to read and write is unsigned, so convert
+// it from size_t preventing integer overflow.
+inline unsigned convert_rwcount(std::size_t count) {
+  return count <= UINT_MAX ? static_cast<unsigned>(count) : UINT_MAX;
+}
+#else
+// Return type of read and write functions.
+typedef ssize_t RWResult;
+
+inline std::size_t convert_rwcount(std::size_t count) { return count; }
+#endif
+}
+
+fmt::BufferedFile::~BufferedFile() FMT_NOEXCEPT {
+  if (file_ && FMT_SYSTEM(fclose(file_)) != 0)
+    fmt::report_system_error(errno, "cannot close file");
+}
+
+fmt::BufferedFile::BufferedFile(
+    fmt::CStringRef filename, fmt::CStringRef mode) {
+  FMT_RETRY_VAL(file_, FMT_SYSTEM(fopen(filename.c_str(), mode.c_str())), 0);
+  if (!file_)
+    FMT_THROW(SystemError(errno, "cannot open file {}", filename));
+}
+
+void fmt::BufferedFile::close() {
+  if (!file_)
+    return;
+  int result = FMT_SYSTEM(fclose(file_));
+  file_ = 0;
+  if (result != 0)
+    FMT_THROW(SystemError(errno, "cannot close file"));
+}
+
+// A macro used to prevent expansion of fileno on broken versions of MinGW.
+#define FMT_ARGS
+
+int fmt::BufferedFile::fileno() const {
+  int fd = FMT_POSIX_CALL(fileno FMT_ARGS(file_));
+  if (fd == -1)
+    FMT_THROW(SystemError(errno, "cannot get file descriptor"));
+  return fd;
+}
+
+fmt::File::File(fmt::CStringRef path, int oflag) {
+  int mode = S_IRUSR | S_IWUSR;
+#if defined(_WIN32) && !defined(__MINGW32__)
+  fd_ = -1;
+  FMT_POSIX_CALL(sopen_s(&fd_, path.c_str(), oflag, _SH_DENYNO, mode));
+#else
+  FMT_RETRY(fd_, FMT_POSIX_CALL(open(path.c_str(), oflag, mode)));
+#endif
+  if (fd_ == -1)
+    FMT_THROW(SystemError(errno, "cannot open file {}", path));
+}
+
+fmt::File::~File() FMT_NOEXCEPT {
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  if (fd_ != -1 && FMT_POSIX_CALL(close(fd_)) != 0)
+    fmt::report_system_error(errno, "cannot close file");
+}
+
+void fmt::File::close() {
+  if (fd_ == -1)
+    return;
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  int result = FMT_POSIX_CALL(close(fd_));
+  fd_ = -1;
+  if (result != 0)
+    FMT_THROW(SystemError(errno, "cannot close file"));
+}
+
+fmt::LongLong fmt::File::size() const {
+#ifdef _WIN32
+  // Use GetFileSize instead of GetFileSizeEx for the case when _WIN32_WINNT
+  // is less than 0x0500 as is the case with some default MinGW builds.
+  // Both functions support large file sizes.
+  DWORD size_upper = 0;
+  HANDLE handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd_));
+  DWORD size_lower = FMT_SYSTEM(GetFileSize(handle, &size_upper));
+  if (size_lower == INVALID_FILE_SIZE) {
+    DWORD error = GetLastError();
+    if (error != NO_ERROR)
+      FMT_THROW(WindowsError(GetLastError(), "cannot get file size"));
+  }
+  fmt::ULongLong long_size = size_upper;
+  return (long_size << sizeof(DWORD) * CHAR_BIT) | size_lower;
+#else
+  typedef struct stat Stat;
+  Stat file_stat = Stat();
+  if (FMT_POSIX_CALL(fstat(fd_, &file_stat)) == -1)
+    FMT_THROW(SystemError(errno, "cannot get file attributes"));
+  FMT_STATIC_ASSERT(sizeof(fmt::LongLong) >= sizeof(file_stat.st_size),
+      "return type of File::size is not large enough");
+  return file_stat.st_size;
+#endif
+}
+
+std::size_t fmt::File::read(void *buffer, std::size_t count) {
+  RWResult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(read(fd_, buffer, convert_rwcount(count))));
+  if (result < 0)
+    FMT_THROW(SystemError(errno, "cannot read from file"));
+  return internal::to_unsigned(result);
+}
+
+std::size_t fmt::File::write(const void *buffer, std::size_t count) {
+  RWResult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count))));
+  if (result < 0)
+    FMT_THROW(SystemError(errno, "cannot write to file"));
+  return internal::to_unsigned(result);
+}
+
+fmt::File fmt::File::dup(int fd) {
+  // Don't retry as dup doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009695399/functions/dup.html
+  int new_fd = FMT_POSIX_CALL(dup(fd));
+  if (new_fd == -1)
+    FMT_THROW(SystemError(errno, "cannot duplicate file descriptor {}", fd));
+  return File(new_fd);
+}
+
+void fmt::File::dup2(int fd) {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1) {
+    FMT_THROW(SystemError(errno,
+      "cannot duplicate file descriptor {} to {}", fd_, fd));
+  }
+}
+
+void fmt::File::dup2(int fd, ErrorCode &ec) FMT_NOEXCEPT {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1)
+    ec = ErrorCode(errno);
+}
+
+void fmt::File::pipe(File &read_end, File &write_end) {
+  // Close the descriptors first to make sure that assignments don't throw
+  // and there are no leaks.
+  read_end.close();
+  write_end.close();
+  int fds[2] = {};
+#ifdef _WIN32
+  // Make the default pipe capacity same as on Linux 2.6.11+.
+  enum { DEFAULT_CAPACITY = 65536 };
+  int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY));
+#else
+  // Don't retry as the pipe function doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html
+  int result = FMT_POSIX_CALL(pipe(fds));
+#endif
+  if (result != 0)
+    FMT_THROW(SystemError(errno, "cannot create pipe"));
+  // The following assignments don't throw because read_fd and write_fd
+  // are closed.
+  read_end = File(fds[0]);
+  write_end = File(fds[1]);
+}
+
+fmt::BufferedFile fmt::File::fdopen(const char *mode) {
+  // Don't retry as fdopen doesn't return EINTR.
+  FILE *f = FMT_POSIX_CALL(fdopen(fd_, mode));
+  if (!f)
+    FMT_THROW(SystemError(errno, "cannot associate stream with file descriptor"));
+  BufferedFile file(f);
+  fd_ = -1;
+  return file;
+}
+
+long fmt::getpagesize() {
+#ifdef _WIN32
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+  return si.dwPageSize;
+#else
+  long size = FMT_POSIX_CALL(sysconf(_SC_PAGESIZE));
+  if (size < 0)
+    FMT_THROW(SystemError(errno, "cannot get memory page size"));
+  return size;
+#endif
+}

include/spdlog/fmt/bundled/posix.h

@@ -0,0 +1,386 @@
+/*
+ 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
+
+#if FMT_GCC_VERSION >= 407
+# define FMT_UNUSED __attribute__((unused))
+#else
+# define FMT_UNUSED
+#endif
+
+#ifndef FMT_USE_STATIC_ASSERT
+# define FMT_USE_STATIC_ASSERT 0
+#endif
+
+#if FMT_USE_STATIC_ASSERT || FMT_HAS_FEATURE(cxx_static_assert) || \
+  (FMT_GCC_VERSION >= 403 && FMT_HAS_GXX_CXX11) || _MSC_VER >= 1600
+# define FMT_STATIC_ASSERT(cond, message) static_assert(cond, message)
+#else
+# define FMT_CONCAT_(a, b) FMT_CONCAT(a, b)
+# define FMT_STATIC_ASSERT(cond, message) \
+  typedef int FMT_CONCAT_(Assert, __LINE__)[(cond) ? 1 : -1] FMT_UNUSED
+#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)
+
+namespace fmt {
+
+// An error code.
+class ErrorCode {
+ private:
+  int value_;
+
+ public:
+  explicit ErrorCode(int value = 0) FMT_NOEXCEPT : value_(value) {}
+
+  int get() const FMT_NOEXCEPT { return value_; }
+};
+
+// A buffered file.
+class BufferedFile {
+ private:
+  FILE *file_;
+
+  friend class File;
+
+  explicit BufferedFile(FILE *f) : file_(f) {}
+
+ public:
+  // Constructs a BufferedFile object which doesn't represent any file.
+  BufferedFile() FMT_NOEXCEPT : file_(0) {}
+
+  // Destroys the object closing the file it represents if any.
+  ~BufferedFile() FMT_NOEXCEPT;
+
+#if !FMT_USE_RVALUE_REFERENCES
+  // Emulate a move constructor and a move assignment operator if rvalue
+  // references are not supported.
+
+ private:
+  // A proxy object to emulate a move constructor.
+  // It is private to make it impossible call operator Proxy directly.
+  struct Proxy {
+    FILE *file;
+  };
+
+public:
+  // A "move constructor" for moving from a temporary.
+  BufferedFile(Proxy p) FMT_NOEXCEPT : file_(p.file) {}
+
+  // A "move constructor" for moving from an lvalue.
+  BufferedFile(BufferedFile &f) FMT_NOEXCEPT : file_(f.file_) {
+    f.file_ = 0;
+  }
+
+  // A "move assignment operator" for moving from a temporary.
+  BufferedFile &operator=(Proxy p) {
+    close();
+    file_ = p.file;
+    return *this;
+  }
+
+  // A "move assignment operator" for moving from an lvalue.
+  BufferedFile &operator=(BufferedFile &other) {
+    close();
+    file_ = other.file_;
+    other.file_ = 0;
+    return *this;
+  }
+
+  // Returns a proxy object for moving from a temporary:
+  //   BufferedFile file = BufferedFile(...);
+  operator Proxy() FMT_NOEXCEPT {
+    Proxy p = {file_};
+    file_ = 0;
+    return p;
+  }
+
+#else
+ private:
+  FMT_DISALLOW_COPY_AND_ASSIGN(BufferedFile);
+
+ public:
+  BufferedFile(BufferedFile &&other) FMT_NOEXCEPT : file_(other.file_) {
+    other.file_ = 0;
+  }
+
+  BufferedFile& operator=(BufferedFile &&other) {
+    close();
+    file_ = other.file_;
+    other.file_ = 0;
+    return *this;
+  }
+#endif
+
+  // Opens a file.
+  BufferedFile(CStringRef filename, CStringRef mode);
+
+  // Closes the file.
+  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.
+  int (fileno)() const;
+
+  void print(CStringRef format_str, const ArgList &args) {
+    fmt::print(file_, format_str, args);
+  }
+  FMT_VARIADIC(void, print, CStringRef)
+};
+
+// A file. Closed file is represented by a File object with descriptor -1.
+// Methods that are not declared with FMT_NOEXCEPT may throw
+// fmt::SystemError 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.
+  File(CStringRef path, int oflag);
+
+#if !FMT_USE_RVALUE_REFERENCES
+  // Emulate a move constructor and a move assignment operator if rvalue
+  // references are not supported.
+
+ private:
+  // A proxy object to emulate a move constructor.
+  // It is private to make it impossible call operator Proxy directly.
+  struct Proxy {
+    int fd;
+  };
+
+ public:
+  // A "move constructor" for moving from a temporary.
+  File(Proxy p) FMT_NOEXCEPT : fd_(p.fd) {}
+
+  // A "move constructor" for moving from an lvalue.
+  File(File &other) FMT_NOEXCEPT : fd_(other.fd_) {
+    other.fd_ = -1;
+  }
+
+  // A "move assignment operator" for moving from a temporary.
+  File &operator=(Proxy p) {
+    close();
+    fd_ = p.fd;
+    return *this;
+  }
+
+  // A "move assignment operator" for moving from an lvalue.
+  File &operator=(File &other) {
+    close();
+    fd_ = other.fd_;
+    other.fd_ = -1;
+    return *this;
+  }
+
+  // Returns a proxy object for moving from a temporary:
+  //   File file = File(...);
+  operator Proxy() FMT_NOEXCEPT {
+    Proxy p = {fd_};
+    fd_ = -1;
+    return p;
+  }
+
+#else
+ private:
+  FMT_DISALLOW_COPY_AND_ASSIGN(File);
+
+ 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;
+  }
+#endif
+
+  // Destroys the object closing the file it represents if any.
+  ~File() FMT_NOEXCEPT;
+
+  // Returns the file descriptor.
+  int descriptor() const FMT_NOEXCEPT { return fd_; }
+
+  // Closes the file.
+  void close();
+
+  // Returns the file size. The size has signed type for consistency with
+  // stat::st_size.
+  LongLong size() const;
+
+  // Attempts to read count bytes from the file into the specified buffer.
+  std::size_t read(void *buffer, std::size_t count);
+
+  // Attempts to write count bytes from the specified buffer to the file.
+  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.
+  static File dup(int fd);
+
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  void dup2(int fd);
+
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  void dup2(int fd, ErrorCode &ec) FMT_NOEXCEPT;
+
+  // Creates a pipe setting up read_end and write_end file objects for reading
+  // and writing respectively.
+  static void pipe(File &read_end, File &write_end);
+
+  // Creates a BufferedFile object associated with this file and detaches
+  // this File object from the file.
+  BufferedFile fdopen(const char *mode);
+};
+
+// Returns the memory page size.
+long getpagesize();
+
+#if (defined(LC_NUMERIC_MASK) || defined(_MSC_VER)) && \
+    !defined(__ANDROID__) && !defined(__CYGWIN__)
+# 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_;
+
+  FMT_DISALLOW_COPY_AND_ASSIGN(Locale);
+
+ public:
+  typedef locale_t Type;
+
+  Locale() : locale_(newlocale(LC_NUMERIC_MASK, "C", NULL)) {
+    if (!locale_)
+      FMT_THROW(fmt::SystemError(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 = 0;
+    double result = strtod_l(str, &end, locale_);
+    str = end;
+    return result;
+  }
+};
+#endif  // FMT_LOCALE
+}  // namespace fmt
+
+#if !FMT_USE_RVALUE_REFERENCES
+namespace std {
+// For compatibility with C++98.
+inline fmt::BufferedFile &move(fmt::BufferedFile &f) { return f; }
+inline fmt::File &move(fmt::File &f) { return f; }
+}
+#endif
+
+#endif  // FMT_POSIX_H_

include/spdlog/fmt/bundled/printf.h

@@ -1,658 +0,0 @@
-/*
-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"
-
-namespace fmt
-{
-namespace internal
-{
-
-// Checks if a value fits in int - used to avoid warnings about comparing
-// signed and unsigned integers.
-template <bool IsSigned>
-struct IntChecker
-{
-    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 IntChecker<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 PrecisionHandler: public ArgVisitor<PrecisionHandler, int>
-{
-public:
-    void report_unhandled_arg()
-    {
-        FMT_THROW(FormatError("precision is not integer"));
-    }
-
-    template <typename T>
-    int visit_any_int(T value)
-    {
-        if (!IntChecker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
-            FMT_THROW(FormatError("number is too big"));
-        return static_cast<int>(value);
-    }
-};
-
-// IsZeroInt::visit(arg) returns true iff arg is a zero integer.
-class IsZeroInt: public ArgVisitor<IsZeroInt, bool>
-{
-public:
-    template <typename T>
-    bool visit_any_int(T value)
-    {
-        return value == 0;
-    }
-};
-
-template <typename T, typename U>
-struct is_same
-{
-    enum
-    {
-        value = 0
-    };
-};
-
-template <typename T>
-struct is_same<T, T>
-{
-    enum
-    {
-        value = 1
-    };
-};
-
-// An argument visitor that 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 = void>
-class ArgConverter: public ArgVisitor<ArgConverter<T>, void>
-{
-private:
-    internal::Arg &arg_;
-    wchar_t type_;
-
-    FMT_DISALLOW_COPY_AND_ASSIGN(ArgConverter);
-
-public:
-    ArgConverter(internal::Arg &arg, wchar_t type)
-        : arg_(arg), type_(type)
-    {}
-
-    void visit_bool(bool value)
-    {
-        if (type_ != 's')
-            visit_any_int(value);
-    }
-
-    template <typename U>
-    void visit_any_int(U value)
-    {
-        bool is_signed = type_ == 'd' || type_ == 'i';
-        using internal::Arg;
-        typedef typename internal::Conditional<
-        is_same<T, void>::value, U, T>::type TargetType;
-        if (sizeof(TargetType) <= sizeof(int))
-        {
-            // Extra casts are used to silence warnings.
-            if (is_signed)
-            {
-                arg_.type = Arg::INT;
-                arg_.int_value = static_cast<int>(static_cast<TargetType>(value));
-            }
-            else
-            {
-                arg_.type = Arg::UINT;
-                typedef typename internal::MakeUnsigned<TargetType>::Type Unsigned;
-                arg_.uint_value = static_cast<unsigned>(static_cast<Unsigned>(value));
-            }
-        }
-        else
-        {
-            if (is_signed)
-            {
-                arg_.type = Arg::LONG_LONG;
-                // 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_.long_long_value = static_cast<LongLong>(value);
-            }
-            else
-            {
-                arg_.type = Arg::ULONG_LONG;
-                arg_.ulong_long_value =
-                    static_cast<typename internal::MakeUnsigned<U>::Type>(value);
-            }
-        }
-    }
-};
-
-// Converts an integer argument to char for printf.
-class CharConverter: public ArgVisitor<CharConverter, void>
-{
-private:
-    internal::Arg &arg_;
-
-    FMT_DISALLOW_COPY_AND_ASSIGN(CharConverter);
-
-public:
-    explicit CharConverter(internal::Arg &arg): arg_(arg)
-    {}
-
-    template <typename T>
-    void visit_any_int(T value)
-    {
-        arg_.type = internal::Arg::CHAR;
-        arg_.int_value = static_cast<char>(value);
-    }
-};
-
-// Checks if an argument is a valid printf width specifier and sets
-// left alignment if it is negative.
-class WidthHandler: public ArgVisitor<WidthHandler, unsigned>
-{
-private:
-    FormatSpec &spec_;
-
-    FMT_DISALLOW_COPY_AND_ASSIGN(WidthHandler);
-
-public:
-    explicit WidthHandler(FormatSpec &spec): spec_(spec)
-    {}
-
-    void report_unhandled_arg()
-    {
-        FMT_THROW(FormatError("width is not integer"));
-    }
-
-    template <typename T>
-    unsigned visit_any_int(T value)
-    {
-        typedef typename internal::IntTraits<T>::MainType 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(FormatError("number is too big"));
-        return static_cast<unsigned>(width);
-    }
-};
-}  // namespace internal
-
-/**
-\rst
-A ``printf`` argument formatter based on the `curiously recurring template
-pattern <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_.
-
-To use `~fmt::BasicPrintfArgFormatter` define a subclass that implements some
-or all of the visit methods with the same signatures as the methods in
-`~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`.
-Pass the subclass as the *Impl* template parameter. When a formatting
-function processes an argument, it will dispatch to a visit method
-specific to the argument type. For example, if the argument type is
-``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
-will be called. If the subclass doesn't contain a method with this signature,
-then a corresponding method of `~fmt::BasicPrintfArgFormatter` or its
-superclass will be called.
-\endrst
-*/
-template <typename Impl, typename Char>
-class BasicPrintfArgFormatter: public internal::ArgFormatterBase<Impl, Char>
-{
-private:
-    void write_null_pointer()
-    {
-        this->spec().type_ = 0;
-        this->write("(nil)");
-    }
-
-    typedef internal::ArgFormatterBase<Impl, Char> Base;
-
-public:
-    /**
-    \rst
-    Constructs an argument formatter object.
-    *writer* is a reference to the output writer and *spec* contains format
-    specifier information for standard argument types.
-    \endrst
-    */
-    BasicPrintfArgFormatter(BasicWriter<Char> &w, FormatSpec &s)
-        : internal::ArgFormatterBase<Impl, Char>(w, s)
-    {}
-
-    /** Formats an argument of type ``bool``. */
-    void visit_bool(bool value)
-    {
-        FormatSpec &fmt_spec = this->spec();
-        if (fmt_spec.type_ != 's')
-            return this->visit_any_int(value);
-        fmt_spec.type_ = 0;
-        this->write(value);
-    }
-
-    /** Formats a character. */
-    void visit_char(int value)
-    {
-        const FormatSpec &fmt_spec = this->spec();
-        BasicWriter<Char> &w = this->writer();
-        if (fmt_spec.type_ && fmt_spec.type_ != 'c')
-            w.write_int(value, fmt_spec);
-        typedef typename BasicWriter<Char>::CharPtr CharPtr;
-        CharPtr out = CharPtr();
-        if (fmt_spec.width_ > 1)
-        {
-            Char fill = ' ';
-            out = w.grow_buffer(fmt_spec.width_);
-            if (fmt_spec.align_ != ALIGN_LEFT)
-            {
-                std::fill_n(out, fmt_spec.width_ - 1, fill);
-                out += fmt_spec.width_ - 1;
-            }
-            else
-            {
-                std::fill_n(out + 1, fmt_spec.width_ - 1, fill);
-            }
-        }
-        else
-        {
-            out = w.grow_buffer(1);
-        }
-        *out = static_cast<Char>(value);
-    }
-
-    /** Formats a null-terminated C string. */
-    void visit_cstring(const char *value)
-    {
-        if (value)
-            Base::visit_cstring(value);
-        else if (this->spec().type_ == 'p')
-            write_null_pointer();
-        else
-            this->write("(null)");
-    }
-
-    /** Formats a pointer. */
-    void visit_pointer(const void *value)
-    {
-        if (value)
-            return Base::visit_pointer(value);
-        this->spec().type_ = 0;
-        write_null_pointer();
-    }
-
-    /** Formats an argument of a custom (user-defined) type. */
-    void visit_custom(internal::Arg::CustomValue c)
-    {
-        BasicFormatter<Char> formatter(ArgList(), this->writer());
-        const Char format_str[] = { '}', 0 };
-        const Char *format = format_str;
-        c.format(&formatter, c.value, &format);
-    }
-};
-
-/** The default printf argument formatter. */
-template <typename Char>
-class PrintfArgFormatter
-    : public BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char>
-{
-public:
-    /** Constructs an argument formatter object. */
-    PrintfArgFormatter(BasicWriter<Char> &w, FormatSpec &s)
-        : BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char>(w, s)
-    {}
-};
-
-/** This template formats data and writes the output to a writer. */
-template <typename Char, typename ArgFormatter = PrintfArgFormatter<Char> >
-class PrintfFormatter: private internal::FormatterBase
-{
-private:
-    BasicWriter<Char> &writer_;
-
-    void parse_flags(FormatSpec &spec, const Char *&s);
-
-    // Returns the argument with specified index or, if arg_index is equal
-    // to the maximum unsigned value, the next argument.
-    internal::Arg get_arg(
-        const Char *s,
-        unsigned arg_index = (std::numeric_limits<unsigned>::max)());
-
-    // Parses argument index, flags and width and returns the argument index.
-    unsigned parse_header(const Char *&s, FormatSpec &spec);
-
-public:
-    /**
-    \rst
-    Constructs a ``PrintfFormatter`` object. References to the arguments and
-    the writer are stored in the formatter object so make sure they have
-    appropriate lifetimes.
-    \endrst
-    */
-    explicit PrintfFormatter(const ArgList &al, BasicWriter<Char> &w)
-        : FormatterBase(al), writer_(w)
-    {}
-
-    /** Formats stored arguments and writes the output to the writer. */
-    FMT_API void format(BasicCStringRef<Char> format_str);
-};
-
-template <typename Char, typename AF>
-void PrintfFormatter<Char, AF>::parse_flags(FormatSpec &spec, const Char *&s)
-{
-    for (;;)
-    {
-        switch (*s++)
-        {
-        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:
-            --s;
-            return;
-        }
-    }
-}
-
-template <typename Char, typename AF>
-internal::Arg PrintfFormatter<Char, AF>::get_arg(const Char *s,
-        unsigned arg_index)
-{
-    (void)s;
-    const char *error = FMT_NULL;
-    internal::Arg arg = arg_index == std::numeric_limits<unsigned>::max() ?
-                        next_arg(error) : FormatterBase::get_arg(arg_index - 1, error);
-    if (error)
-        FMT_THROW(FormatError(!*s ? "invalid format string" : error));
-    return arg;
-}
-
-template <typename Char, typename AF>
-unsigned PrintfFormatter<Char, AF>::parse_header(
-    const Char *&s, FormatSpec &spec)
-{
-    unsigned arg_index = std::numeric_limits<unsigned>::max();
-    Char c = *s;
-    if (c >= '0' && c <= '9')
-    {
-        // Parse an argument index (if followed by '$') or a width possibly
-        // preceded with '0' flag(s).
-        unsigned value = internal::parse_nonnegative_int(s);
-        if (*s == '$')    // value is an argument index
-        {
-            ++s;
-            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, s);
-    // Parse width.
-    if (*s >= '0' && *s <= '9')
-    {
-        spec.width_ = internal::parse_nonnegative_int(s);
-    }
-    else if (*s == '*')
-    {
-        ++s;
-        spec.width_ = internal::WidthHandler(spec).visit(get_arg(s));
-    }
-    return arg_index;
-}
-
-template <typename Char, typename AF>
-void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str)
-{
-    const Char *start = format_str.c_str();
-    const Char *s = start;
-    while (*s)
-    {
-        Char c = *s++;
-        if (c != '%') continue;
-        if (*s == c)
-        {
-            write(writer_, start, s);
-            start = ++s;
-            continue;
-        }
-        write(writer_, start, s - 1);
-
-        FormatSpec spec;
-        spec.align_ = ALIGN_RIGHT;
-
-        // Parse argument index, flags and width.
-        unsigned arg_index = parse_header(s, spec);
-
-        // Parse precision.
-        if (*s == '.')
-        {
-            ++s;
-            if ('0' <= *s && *s <= '9')
-            {
-                spec.precision_ = static_cast<int>(internal::parse_nonnegative_int(s));
-            }
-            else if (*s == '*')
-            {
-                ++s;
-                spec.precision_ = internal::PrecisionHandler().visit(get_arg(s));
-            }
-        }
-
-        using internal::Arg;
-        Arg arg = get_arg(s, arg_index);
-        if (spec.flag(HASH_FLAG) && internal::IsZeroInt().visit(arg))
-            spec.flags_ &= ~internal::to_unsigned<int>(HASH_FLAG);
-        if (spec.fill_ == '0')
-        {
-            if (arg.type <= Arg::LAST_NUMERIC_TYPE)
-                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::ArgConverter;
-        switch (*s++)
-        {
-        case 'h':
-            if (*s == 'h')
-                ArgConverter<signed char>(arg, *++s).visit(arg);
-            else
-                ArgConverter<short>(arg, *s).visit(arg);
-            break;
-        case 'l':
-            if (*s == 'l')
-                ArgConverter<fmt::LongLong>(arg, *++s).visit(arg);
-            else
-                ArgConverter<long>(arg, *s).visit(arg);
-            break;
-        case 'j':
-            ArgConverter<intmax_t>(arg, *s).visit(arg);
-            break;
-        case 'z':
-            ArgConverter<std::size_t>(arg, *s).visit(arg);
-            break;
-        case 't':
-            ArgConverter<std::ptrdiff_t>(arg, *s).visit(arg);
-            break;
-        case 'L':
-            // printf produces garbage when 'L' is omitted for long double, no
-            // need to do the same.
-            break;
-        default:
-            --s;
-            ArgConverter<void>(arg, *s).visit(arg);
-        }
-
-        // Parse type.
-        if (!*s)
-            FMT_THROW(FormatError("invalid format string"));
-        spec.type_ = static_cast<char>(*s++);
-        if (arg.type <= Arg::LAST_INTEGER_TYPE)
-        {
-            // Normalize type.
-            switch (spec.type_)
-            {
-            case 'i':
-            case 'u':
-                spec.type_ = 'd';
-                break;
-            case 'c':
-                // TODO: handle wchar_t
-                internal::CharConverter(arg).visit(arg);
-                break;
-            }
-        }
-
-        start = s;
-
-        // Format argument.
-        AF(writer_, spec).visit(arg);
-    }
-    write(writer_, start, s);
-}
-
-template <typename Char>
-void printf(BasicWriter<Char> &w, BasicCStringRef<Char> format, ArgList args)
-{
-    PrintfFormatter<Char>(args, w).format(format);
-}
-
-/**
-\rst
-Formats arguments and returns the result as a string.
-
-**Example**::
-
-std::string message = fmt::sprintf("The answer is %d", 42);
-\endrst
-*/
-inline std::string sprintf(CStringRef format, ArgList args)
-{
-    MemoryWriter w;
-    printf(w, format, args);
-    return w.str();
-}
-FMT_VARIADIC(std::string, sprintf, CStringRef)
-
-inline std::wstring sprintf(WCStringRef format, ArgList args)
-{
-    WMemoryWriter w;
-    printf(w, format, args);
-    return w.str();
-}
-FMT_VARIADIC_W(std::wstring, sprintf, WCStringRef)
-
-/**
-\rst
-Prints formatted data to the file *f*.
-
-**Example**::
-
-fmt::fprintf(stderr, "Don't %s!", "panic");
-\endrst
-*/
-FMT_API int fprintf(std::FILE *f, CStringRef format, ArgList args);
-FMT_VARIADIC(int, fprintf, std::FILE *, CStringRef)
-
-/**
-\rst
-Prints formatted data to ``stdout``.
-
-**Example**::
-
-fmt::printf("Elapsed time: %.2f seconds", 1.23);
-\endrst
-*/
-inline int printf(CStringRef format, ArgList args)
-{
-    return fprintf(stdout, format, args);
-}
-FMT_VARIADIC(int, printf, CStringRef)
-
-/**
-\rst
-Prints formatted data to the stream *os*.
-
-**Example**::
-
-fprintf(cerr, "Don't %s!", "panic");
-\endrst
-*/
-inline int fprintf(std::ostream &os, CStringRef format_str, ArgList args)
-{
-    MemoryWriter w;
-    printf(w, format_str, args);
-    internal::write(os, w);
-    return static_cast<int>(w.size());
-}
-FMT_VARIADIC(int, fprintf, std::ostream &, CStringRef)
-}  // namespace fmt
-
-#ifdef FMT_HEADER_ONLY
-# include "printf.cc"
-#endif
-
-#endif  // FMT_PRINTF_H_

include/spdlog/fmt/bundled/time.h

@@ -0,0 +1,53 @@
+/*
+ Formatting library for C++ - time formatting
+
+ Copyright (c) 2012 - 2016, 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>
+
+namespace fmt {
+template <typename ArgFormatter>
+void format(BasicFormatter<char, ArgFormatter> &f,
+            const char *&format_str, const std::tm &tm) {
+  if (*format_str == ':')
+    ++format_str;
+  const char *end = format_str;
+  while (*end && *end != '}')
+    ++end;
+  if (*end != '}')
+    FMT_THROW(FormatError("missing '}' in format string"));
+  internal::MemoryBuffer<char, internal::INLINE_BUFFER_SIZE> format;
+  format.append(format_str, end + 1);
+  format[format.size() - 1] = '\0';
+  Buffer<char> &buffer = f.writer().buffer();
+  std::size_t start = buffer.size();
+  for (;;) {
+    std::size_t size = buffer.capacity() - start;
+    std::size_t count = std::strftime(&buffer[start], size, &format[0], &tm);
+    if (count != 0) {
+      buffer.resize(start + count);
+      break;
+    }
+    if (size >= 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;
+    buffer.reserve(buffer.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH));
+  }
+  format_str = end + 1;
+}
+}
+
+#endif  // FMT_TIME_H_