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 /* DANGER!!!! These must be defined *BEFORE* replacements.h and the malloc() macro!!!! */
  25
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #ifdef HAVE_STRINGS_H
  29 #include <strings.h>
  30 #endif
  31 /*
  32  * clear_malloc
  33  *
  34  * will alloc memory and clear it
  35  */
  36 void *clear_malloc(size_t size)
  37 {
  38         void *t = malloc(size);
  39         if (t!=NULL)
  40         {
  41                 memset(t, 0x00, size);
  42         }
  43         return t;
  44 }
  45
  46 void *fill_malloc(size_t size)
  47 {
  48         void *t = malloc(size);
  49         if (t!=NULL)
  50         {
  51                 /* We want to initialize memory to some known bad state.  */
  52                 /* 0 and 0xff yields 0 and -1 as integers, which often          */
  53                 /* have meaningful values. 0x5555... is not often a valid       */
  54                 /* integer and is quite easily spotted in the debugger          */
  55                 /* also it is almost certainly an invalid address                                       */
  56                 memset(t, 0x55, size);
  57         }
  58         return t;
  59 }
  60
  61 #include "replacements.h"
  62
  63 #include <stdio.h>
  64
  65 /* replacements for gettimeofday */
  66 #ifndef HAVE_GETTIMEOFDAY
  67
  68 /* Windows */
  69 #ifdef _WIN32
  70
  71 #ifndef __GNUC__
  72 #define EPOCHFILETIME (116444736000000000i64)
  73 #else
  74 #define EPOCHFILETIME (116444736000000000LL)
  75 #endif
  76
  77 int gettimeofday(struct timeval *tv, struct timezone *tz)
  78 {
  79         FILETIME        ft;
  80         LARGE_INTEGER   li;
  81         __int64         t;
  82         static int      tzflag;
  83
  84         if (tv)
  85         {
  86                 GetSystemTimeAsFileTime(&ft);
  87                 li.LowPart  = ft.dwLowDateTime;
  88                 li.HighPart = ft.dwHighDateTime;
  89                 t  = li.QuadPart;                   /* In 100-nanosecond intervals */
  90                 t -= EPOCHFILETIME;                 /* Offset to the Epoch time */
  91                 t /= 10;                            /* In microseconds */
  92                 tv->tv_sec  = (long)(t / 1000000);
  93                 tv->tv_usec = (long)(t % 1000000);
  94         }
  95
  96         if (tz)
  97         {
  98                 if (!tzflag)
  99                 {
 100                         _tzset();
 101                         tzflag++;
 102                 }
 103                 tz->tz_minuteswest = _timezone / 60;
 104                 tz->tz_dsttime = _daylight;
 105         }
 106
 107         return 0;
 108 }
 109 #endif /* _WIN32 */
 110
 111 #endif /* HAVE_GETTIMEOFDAY */
 112
 113 #ifndef HAVE_STRNLEN
 114 size_t strnlen(const char *s, size_t maxlen)
 115 {
 116         const char *end= (const char *)memchr(s, '\0', maxlen);
 117         return end ? (size_t) (end - s) : maxlen;
 118 }
 119 #endif
 120
 121 #ifndef HAVE_STRNDUP
 122 char* strndup(const char *s, size_t n)
 123 {
 124         size_t len = strnlen (s, n);
 125         char *new = (char *) malloc (len + 1);
 126
 127         if (new == NULL)
 128                 return NULL;
 129
 130         new[len] = '\0';
 131         return (char *) memcpy (new, s, len);
 132 }
 133 #endif