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