src/helper/replacements.c

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "replacements.h"
  25
  26 #include <stdio.h>
  27
  28 /* replacements for gettimeofday */
  29 #ifndef HAVE_GETTIMEOFDAY
  30
  31 /* Windows */
  32 #ifdef _WIN32
  33
  34 #ifndef __GNUC__
  35 #define EPOCHFILETIME (116444736000000000i64)
  36 #else
  37 #define EPOCHFILETIME (116444736000000000LL)
  38 #endif
  39
  40 int gettimeofday(struct timeval *tv, struct timezone *tz)
  41 {
  42         FILETIME        ft;
  43         LARGE_INTEGER   li;
  44         __int64         t;
  45         static int      tzflag;
  46
  47         if (tv)
  48         {
  49                 GetSystemTimeAsFileTime(&ft);
  50                 li.LowPart  = ft.dwLowDateTime;
  51                 li.HighPart = ft.dwHighDateTime;
  52                 t  = li.QuadPart;                   /* In 100-nanosecond intervals */
  53                 t -= EPOCHFILETIME;                 /* Offset to the Epoch time */
  54                 t /= 10;                            /* In microseconds */
  55                 tv->tv_sec  = (long)(t / 1000000);
  56                 tv->tv_usec = (long)(t % 1000000);
  57         }
  58
  59         if (tz)
  60         {
  61                 if (!tzflag)
  62                 {
  63                         _tzset();
  64                         tzflag++;
  65                 }
  66                 tz->tz_minuteswest = _timezone / 60;
  67                 tz->tz_dsttime = _daylight;
  68         }
  69
  70         return 0;
  71 }
  72 #endif /* _WIN32 */
  73
  74 #endif /* HAVE_GETTIMEOFDAY */
  75
  76 #ifndef HAVE_STRNLEN
  77 size_t strnlen(const char *s, size_t maxlen)
  78 {
  79         const char *end= (const char *)memchr(s, '\0', maxlen);
  80         return end ? (size_t) (end - s) : maxlen;
  81 }
  82 #endif
  83
  84 #ifndef HAVE_STRNDUP
  85 char* strndup(const char *s, size_t n)
  86 {
  87         size_t len = strnlen (s, n);
  88         char *new = (char *) malloc (len + 1);
  89
  90         if (new == NULL)
  91                 return NULL;
  92
  93         new[len] = '\0';
  94         return (char *) memcpy (new, s, len);
  95 }
  96 #endif