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[UCRT] Import Microsoft.Windows.SDK.CRTSource version 10.0.22621.3
Imported from https://www.nuget.org/packages/Microsoft.Windows.SDK.CRTSource/10.0.22621.3 License: MIT
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Timo Kreuzer
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568 changed files with 115483 additions and 0 deletions
197
sdk/lib/ucrt/time/asctime.cpp
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197
sdk/lib/ucrt/time/asctime.cpp
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//
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// asctime.cpp
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// The asctime() family of functions, which convert a tm struct into a string.
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//
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#include <corecrt_internal_securecrt.h>
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#include <corecrt_internal_time.h>
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#define _ASCBUFSIZE 26
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//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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//
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// asctime_s and _wasctime_s
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//
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//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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template <typename Character>
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static Character* __cdecl common_asctime_s_write_value(
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_Out_writes_(2) Character* p,
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int const value,
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bool const zero_fill
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) throw()
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{
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if (value >= 10 || zero_fill)
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{
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*p++ = static_cast<Character>('0' + value / 10);
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}
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else
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{
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*p++ = ' ';
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}
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*p++ = static_cast<Character>('0' + value % 10);
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return p;
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}
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// Converts a time structure (tm) into an ASCII string. The string is always
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// exactly 26 characters long, in the form Tue May 1 02:34:55 1984\n\0. The
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// buffer 'size_in_chars' must be at least 26. The string is generated into the
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// buffer. On success, zero is returned and the buffer contains the time string;
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// on failure, an error code is returned and the contents of the buffer are
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// indeterminate.
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template <typename Character>
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_Success_(return == 0)
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static errno_t __cdecl common_asctime_s(
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_Out_writes_z_(size_in_chars) _Post_readable_size_(_ASCBUFSIZE) Character* const buffer,
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_In_range_(>=, _ASCBUFSIZE) size_t const size_in_chars,
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tm const* const tm_value
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) throw()
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{
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_VALIDATE_RETURN_ERRCODE(
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buffer != nullptr && size_in_chars > 0,
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EINVAL
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)
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_RESET_STRING(buffer, size_in_chars);
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_VALIDATE_RETURN_ERRCODE(size_in_chars >= _ASCBUFSIZE, EINVAL)
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_VALIDATE_RETURN_ERRCODE(tm_value != nullptr, EINVAL)
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_VALIDATE_RETURN_ERRCODE(tm_value->tm_year >= 0, EINVAL)
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// Month, hour, minute, and second are zero-based
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_VALIDATE_RETURN_ERRCODE(tm_value->tm_mon >= 0 && tm_value->tm_mon <= 11, EINVAL)
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_VALIDATE_RETURN_ERRCODE(tm_value->tm_hour >= 0 && tm_value->tm_hour <= 23, EINVAL)
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_VALIDATE_RETURN_ERRCODE(tm_value->tm_min >= 0 && tm_value->tm_min <= 59, EINVAL)
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_VALIDATE_RETURN_ERRCODE(tm_value->tm_sec >= 0 && tm_value->tm_sec <= 60, EINVAL) // including leap second
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_VALIDATE_RETURN_ERRCODE(tm_value->tm_wday >= 0 && tm_value->tm_wday <= 6, EINVAL)
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_VALIDATE_RETURN_ERRCODE(__crt_time_is_day_valid(tm_value->tm_year, tm_value->tm_mon, tm_value->tm_mday), EINVAL)
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Character* buffer_it = buffer;
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// Copy the day name into the buffer:
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char const* const day_first = __dnames + tm_value->tm_wday * 3;
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char const* const day_last = day_first + 3;
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for (char const* day_it = day_first; day_it != day_last; ++day_it)
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*buffer_it++ = static_cast<Character>(*day_it);
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*buffer_it++ = static_cast<Character>(' ');
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// Copy the month name into the buffer:
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char const* const month_first = __mnames + tm_value->tm_mon * 3;
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char const* const month_last = month_first + 3;
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for (char const* month_it = month_first; month_it != month_last; ++month_it)
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*buffer_it++ = static_cast<Character>(*month_it);
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*buffer_it++ = static_cast<Character>(' ');
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// Copy the day of the month (1 - 31) into the buffer:
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buffer_it = common_asctime_s_write_value(buffer_it, tm_value->tm_mday, false);
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*buffer_it++ = static_cast<Character>(' ');
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// Copy the time into the buffer in HH:MM:SS form:
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buffer_it = common_asctime_s_write_value(buffer_it, tm_value->tm_hour, true);
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*buffer_it++ = static_cast<Character>(':');
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buffer_it = common_asctime_s_write_value(buffer_it, tm_value->tm_min, true);
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*buffer_it++ = static_cast<Character>(':');
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buffer_it = common_asctime_s_write_value(buffer_it, tm_value->tm_sec, true);
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*buffer_it++ = static_cast<Character>(' ');
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// Copy the four-digit year into the buffer:
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buffer_it = common_asctime_s_write_value(buffer_it, __crt_get_century(tm_value->tm_year), true);
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buffer_it = common_asctime_s_write_value(buffer_it, __crt_get_2digit_year(tm_value->tm_year), true);
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// And that's it...
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*buffer_it++ = static_cast<Character>('\n');
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*buffer_it++ = static_cast<Character>('\0');
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return 0;
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}
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extern "C" errno_t __cdecl asctime_s(
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char* const buffer,
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size_t const size_in_chars,
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tm const* const tm_value
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)
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{
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return common_asctime_s(buffer, size_in_chars, tm_value);
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}
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extern "C" errno_t __cdecl _wasctime_s(
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wchar_t* const buffer,
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size_t const size_in_chars,
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tm const* const tm_value
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)
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{
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return common_asctime_s(buffer, size_in_chars, tm_value);
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}
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//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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//
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// asctime and _wasctime
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//
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//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// Utility functions used by common_asctime to get the per-thread actime buffer.
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static char** common_asctime_get_ptd_buffer(char) throw()
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{
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__acrt_ptd* const ptd = __acrt_getptd_noexit();
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if (ptd == nullptr)
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return nullptr;
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return &ptd->_asctime_buffer;
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}
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static wchar_t** common_asctime_get_ptd_buffer(wchar_t) throw()
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{
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__acrt_ptd* const ptd = __acrt_getptd_noexit();
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if (ptd == nullptr)
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return nullptr;
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return &ptd->_wasctime_buffer;
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}
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// Converts a time structure (tm) into an ASCII string. The string is always
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// exactly 26 characters long, in the form Tue May 1 02:34:55 1984\n\0.
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// The return value is a pointer to a per-thread buffer containing the
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// generated time string.
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template <typename Character>
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_Success_(return != 0)
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_Ret_writes_z_(26)
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static Character* __cdecl common_asctime(tm const* const tm_value) throw()
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{
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static Character static_buffer[_ASCBUFSIZE];
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Character** ptd_buffer_address = common_asctime_get_ptd_buffer(Character());
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if (ptd_buffer_address != nullptr && *ptd_buffer_address == nullptr)
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{
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*ptd_buffer_address = _calloc_crt_t(Character, _ASCBUFSIZE).detach();
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}
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Character* const buffer = ptd_buffer_address != nullptr && *ptd_buffer_address != nullptr
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? *ptd_buffer_address
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: static_buffer;
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errno_t const status = common_asctime_s(buffer, _ASCBUFSIZE, tm_value);
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if (status != 0)
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return nullptr;
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return buffer;
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}
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extern "C" char* __cdecl asctime(tm const* const tm_value)
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{
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return common_asctime<char>(tm_value);
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}
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extern "C" wchar_t* __cdecl _wasctime(tm const* const tm_value)
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{
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return common_asctime<wchar_t>(tm_value);
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}
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