lib/sdk/crt/time/ctime.c

   1 /*
   2  * COPYRIGHT:   LGPL, See LGPL.txt in the top level directory
   3  * PROJECT:     ReactOS CRT library
   4  * FILE:        lib/sdk/crt/time/ctime.c
   5  * PURPOSE:     Implementation of ctime, _ctime_s
   6  * PROGRAMERS:  Timo Kreuzer
   7  */
   8 #define MINGW_HAS_SECURE_API 1
   9
  10 #define RC_INVOKED 1 // to prevent inline functions
  11 #include <tchar.h>
  12 #include <time.h>
  13 #include "bitsfixup.h"
  14
  15 #define EINVAL -1
  16
  17 /* Doesn't really exist, but we need it here */
  18 _CRTIMP errno_t __cdecl localtime_s(struct tm *_Tm,const time_t *_Time);
  19
  20 /******************************************************************************
  21  * \name _tctime_s
  22  * \brief Converts a time_t value into a string.
  23  * \param buffer Buffer that receives the string (26 characters).
  24  * \param numberOfElements Size of the buffer in characters.
  25  * \param time Pointer to the UTC time.
  26  */
  27 errno_t
  28 _tctime_s(_TCHAR *buffer, size_t numberOfElements, const time_t *time)
  29 {
  30     struct tm _tm;
  31
  32     if (localtime_s(&_tm, time) == EINVAL)
  33     {
  34         return EINVAL;
  35     }
  36     return _tasctime_s(buffer, numberOfElements, &_tm);
  37 }
  38
  39 /******************************************************************************
  40  * \name _tctime
  41  * \brief Converts a time_t value into a string and returns a pointer to it.
  42  * \param time Pointer to the UTC time.
  43  * \remarks The string is stored in thread local buffer, shared between
  44  *          ctime, gmtime and localtime (both 32 and 64 bit versions).
  45  */
  46 _TCHAR *
  47 _tctime(const time_t *ptime)
  48 {
  49     struct tm *ptm = localtime(ptime);
  50     if (!ptm)
  51     {
  52         return 0;
  53     }
  54     return _tasctime(ptm);
  55 }
  56