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