include/fmt/format-inl.h

// 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;
    }

    // Fallback to strerror if strerror_r and strerror_s are not available.
    int fallback(internal::null<>) {
      errno = 0;
      buffer_ = strerror(error_code_);
      return errno;
    }

   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

#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
class locale {
 private:
  std::locale locale_;

 public:
  explicit locale(std::locale loc = std::locale()) : locale_(loc) {}
  std::locale get() { return locale_; }
};

FMT_FUNC size_t internal::count_code_points(u8string_view s) {
  const char8_t *data = s.data();
  int num_code_points = 0;
  for (size_t i = 0, size = s.size(); i != size; ++i) {
    if ((data[i].value & 0xc0) != 0x80)
      ++num_code_points;
  }
  return num_code_points;
}

template <typename Char>
FMT_FUNC Char internal::thousands_sep(locale_provider *lp) {
  std::locale loc = lp ? lp->locale().get() : std::locale();
  return std::use_facet<std::numpunct<Char>>(loc).thousands_sep();
}
#else
template <typename Char>
FMT_FUNC Char internal::thousands_sep(locale_provider *lp) {
  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 *buffer, std::size_t size, const char *format, int precision, T value) {
  return precision < 0 ?
      FMT_SNPRINTF(buffer, size, format, value) :
      FMT_SNPRINTF(buffer, size, format, precision, value);
}

template <typename T>
int char_traits<wchar_t>::format_float(
    wchar_t *buffer, std::size_t size, const wchar_t *format, int precision,
    T value) {
  return precision < 0 ?
      FMT_SWPRINTF(buffer, size, format, value) :
      FMT_SWPRINTF(buffer, 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>::RESET_COLOR[] = "\x1b[0m";
template <typename T> const wchar_t basic_data<T>::WRESET_COLOR[] = L"\x1b[0m";

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]);
}

// Writes the exponent exp in the form "[+-]d{1,3}" to buffer.
FMT_FUNC char *write_exponent(char *buffer, int exp) {
  FMT_ASSERT(-1000 < exp && exp < 1000, "exponent out of range");
  if (exp < 0) {
    *buffer++ = '-';
    exp = -exp;
  } else {
    *buffer++ = '+';
  }
  if (exp >= 100) {
    *buffer++ = static_cast<char>('0' + exp / 100);
    exp %= 100;
    const char *d = data::DIGITS + exp * 2;
    *buffer++ = d[0];
    *buffer++ = d[1];
  } else if (exp >= 10) {
    const char *d = data::DIGITS + exp * 2;
    *buffer++ = d[0];
    *buffer++ = d[1];
  } else {
    *buffer++ = static_cast<char>('0' + exp);
  }
  return buffer;
}

// Generates output using Grisu2 digit-gen algorithm.
FMT_FUNC void grisu2_gen_digits(
    const fp &scaled_value, const fp &scaled_upper, uint64_t delta,
    char *buffer, size_t &size, int &dec_exp) {
  internal::fp one(1ull << -scaled_upper.e, scaled_upper.e);
  // hi (p1 in Grisu) contains the most significant digits of scaled_upper.
  // hi = floor(scaled_upper / one).
  uint32_t hi = static_cast<uint32_t>(scaled_upper.f >> -one.e);
  // lo (p2 in Grisu) contains the least significants digits of scaled_upper.
  // lo = scaled_upper mod 1.
  uint64_t lo = scaled_upper.f & (one.f - 1);
  size = 0;
  auto exp = count_digits(hi);  // kappa in Grisu.
  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)
      buffer[size++] = static_cast<char>('0' + digit);
    --exp;
    uint64_t remainder = (static_cast<uint64_t>(hi) << -one.e) + lo;
    if (remainder <= delta) {
      dec_exp += exp;
      // TODO: use scaled_value
      (void)scaled_value;
      return;
    }
  }
  for (;;) {
    lo *= 10;
    delta *= 10;
    char digit = static_cast<char>(lo >> -one.e);
    if (digit != 0 || size != 0)
      buffer[size++] = static_cast<char>('0' + digit);
    lo &= one.f - 1;
    --exp;
    if (lo < delta) {
      dec_exp += exp;
      return;
    }
  }
}

// Prettifies the output of the Grisu2 algorithm.
// The number is given as v = buffer * 10^exp.
FMT_FUNC void grisu2_prettify(char *buffer, size_t &size, int exp, char type,
                              size_t precision, bool print_decimal_point) {
  int int_size = static_cast<int>(size);
  // 10^(full_exp - 1) <= v <= 10^full_exp.
  int full_exp = int_size + exp;
  if (int_size <= full_exp && full_exp <= 21) {
    // 1234e7 -> 12340000000
    std::uninitialized_fill_n(buffer + int_size, full_exp - int_size, '0');
    char *p = buffer + full_exp;
    if (print_decimal_point && size < precision) {
      *p++ = '.';
      auto fill_size = precision - size;
      std::uninitialized_fill_n(p, fill_size, '0');
      p += fill_size;
    }
    size = to_unsigned(p - buffer);
  } else if (0 < full_exp && full_exp <= 21) {
    // 1234e-2 -> 12.34
    size_t fractional_size = to_unsigned(int_size - full_exp);
    std::memmove(buffer + full_exp + 1, buffer + full_exp, fractional_size);
    buffer[full_exp] = '.';
    if (type == 'f' && fractional_size < precision) {
      size_t num_zeros = precision - fractional_size;
      std::uninitialized_fill_n(buffer + size + 1, num_zeros, '0');
      size += num_zeros;
    }
    ++size;
  } else if (-6 < full_exp && full_exp <= 0) {
    // 1234e-6 -> 0.001234
    int offset = 2 - full_exp;
    std::memmove(buffer + offset, buffer, size);
    buffer[0] = '0';
    buffer[1] = '.';
    std::uninitialized_fill_n(buffer + 2, -full_exp, '0');
    size = to_unsigned(int_size + offset);
  } else {
    // Insert a decimal point after the first digit and add an exponent.
    std::memmove(buffer + 2, buffer + 1, size - 1);
    buffer[1] = '.';
    char *p = buffer + size + 1;
    *p++ = 'e';
    size = to_unsigned(write_exponent(p, full_exp - 1) - buffer);
  }
}

FMT_FUNC void grisu2_format_positive(double value, char *buffer, size_t &size,
                                     int &dec_exp) {
  FMT_ASSERT(value > 0, "value is nonpositive");
  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.
  const int min_exp = -60;  // alpha in Grisu.
  auto dec_pow = get_cached_power(  // \tilde{c}_{-k} in Grisu.
      min_exp - (upper.e + fp::significand_size), dec_exp);
  dec_exp = -dec_exp;
  fp_value.normalize();
  fp scaled_value = fp_value * dec_pow;
  fp scaled_lower = lower * dec_pow;  // \tilde{M}^- in Grisu.
  fp scaled_upper = upper * dec_pow;  // \tilde{M}^+ in Grisu.
  ++scaled_lower.f;  // \tilde{M}^- + 1 ulp -> M^-_{\uparrow}.
  --scaled_upper.f;  // \tilde{M}^+ - 1 ulp -> M^+_{\downarrow}.
  uint64_t delta = scaled_upper.f - scaled_lower.f;
  grisu2_gen_digits(scaled_value, scaled_upper, delta, buffer, size, dec_exp);
}

// Formats value using Grisu2 algorithm. Grisu2 doesn't give any guarantees on
// the shortness of the result.
FMT_FUNC void grisu2_format(double value, char *buffer, size_t &size, char type,
                            int precision, bool print_decimal_point) {
  FMT_ASSERT(value >= 0, "value is negative");
  int dec_exp = 0;  // K in Grisu.
  if (value > 0) {
    grisu2_format_positive(value, buffer, size, dec_exp);
  } else {
    *buffer = '0';
    size = 1;
  }
  size_t unsigned_precision = precision >= 0 ? precision : 6;
  if (size > unsigned_precision) {
    // TODO: round instead of truncating
    dec_exp += static_cast<int>(size - unsigned_precision); 
    size = unsigned_precision;
  }
  grisu2_prettify(buffer, size, dec_exp, type, unsigned_precision,
                  print_decimal_point);
}
}  // 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);
}

template <typename Char>
void basic_fixed_buffer<Char>::grow(std::size_t) {
  FMT_THROW(std::runtime_error("buffer overflow"));
}

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;
  vformat_to(buffer, format_str, 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;
  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);
}

#ifndef FMT_EXTENDED_COLORS
FMT_FUNC 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);
}

FMT_FUNC 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
namespace internal {
FMT_CONSTEXPR void to_esc(uint8_t c, char out[], int offset) {
  out[offset + 0] = static_cast<char>('0' + c / 100);
  out[offset + 1] = static_cast<char>('0' + c / 10 % 10);
  out[offset + 2] = static_cast<char>('0' + c % 10);
}
} // namespace internal

FMT_FUNC void vprint_rgb(rgb fd, string_view format, format_args args) {
  char escape_fd[] = "\x1b[38;2;000;000;000m";
  internal::to_esc(fd.r, escape_fd, 7);
  internal::to_esc(fd.g, escape_fd, 11);
  internal::to_esc(fd.b, escape_fd, 15);

  std::fputs(escape_fd, stdout);
  vprint(format, args);
  std::fputs(internal::data::RESET_COLOR, stdout);
}

FMT_FUNC void vprint_rgb(rgb fd, rgb bg, string_view format, format_args args) {
  char escape_fd[] = "\x1b[38;2;000;000;000m"; // foreground color
  char escape_bg[] = "\x1b[48;2;000;000;000m"; // background color
  internal::to_esc(fd.r, escape_fd, 7);
  internal::to_esc(fd.g, escape_fd, 11);
  internal::to_esc(fd.b, escape_fd, 15);

  internal::to_esc(bg.r, escape_bg, 7);
  internal::to_esc(bg.g, escape_bg, 11);
  internal::to_esc(bg.b, escape_bg, 15);

  std::fputs(escape_fd, stdout);
  std::fputs(escape_bg, stdout);
  vprint(format, args);
  std::fputs(internal::data::RESET_COLOR, stdout);
}
#endif
#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
FMT_FUNC locale locale_provider::locale() { return fmt::locale(); }
#endif

FMT_END_NAMESPACE

#ifdef _MSC_VER
# pragma warning(pop)
#endif

#endif  // FMT_FORMAT_INL_H_