src/helper/replacements.c

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                      *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 /* DANGER!!!! These must be defined *BEFORE* replacements.h and the malloc() macro!!!! */
  28
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #ifdef HAVE_STRINGS_H
  32 #include <strings.h>
  33 #endif
  34 /*
  35  * clear_malloc
  36  *
  37  * will alloc memory and clear it
  38  */
  39 void *clear_malloc(size_t size)
  40 {
  41         void *t = malloc(size);
  42         if (t!=NULL)
  43         {
  44                 memset(t, 0x00, size);
  45         }
  46         return t;
  47 }
  48
  49 void *fill_malloc(size_t size)
  50 {
  51         void *t = malloc(size);
  52         if (t!=NULL)
  53         {
  54                 /* We want to initialize memory to some known bad state.  */
  55                 /* 0 and 0xff yields 0 and -1 as integers, which often          */
  56                 /* have meaningful values. 0x5555... is not often a valid       */
  57                 /* integer and is quite easily spotted in the debugger          */
  58                 /* also it is almost certainly an invalid address                                       */
  59                 memset(t, 0x55, size);
  60         }
  61         return t;
  62 }
  63
  64 #include "replacements.h"
  65
  66 #include <stdio.h>
  67
  68 /* replacements for gettimeofday */
  69 #ifndef HAVE_GETTIMEOFDAY
  70
  71 /* Windows */
  72 #ifdef _WIN32
  73
  74 #ifndef __GNUC__
  75 #define EPOCHFILETIME (116444736000000000i64)
  76 #else
  77 #define EPOCHFILETIME (116444736000000000LL)
  78 #endif
  79
  80 int gettimeofday(struct timeval *tv, struct timezone *tz)
  81 {
  82         FILETIME        ft;
  83         LARGE_INTEGER   li;
  84         __int64         t;
  85         static int      tzflag;
  86
  87         if (tv)
  88         {
  89                 GetSystemTimeAsFileTime(&ft);
  90                 li.LowPart  = ft.dwLowDateTime;
  91                 li.HighPart = ft.dwHighDateTime;
  92                 t  = li.QuadPart;                   /* In 100-nanosecond intervals */
  93                 t -= EPOCHFILETIME;                 /* Offset to the Epoch time */
  94                 t /= 10;                            /* In microseconds */
  95                 tv->tv_sec  = (long)(t / 1000000);
  96                 tv->tv_usec = (long)(t % 1000000);
  97         }
  98
  99         if (tz)
 100         {
 101                 if (!tzflag)
 102                 {
 103                         _tzset();
 104                         tzflag++;
 105                 }
 106                 tz->tz_minuteswest = _timezone / 60;
 107                 tz->tz_dsttime = _daylight;
 108         }
 109
 110         return 0;
 111 }
 112 #endif /* _WIN32 */
 113
 114 #endif /* HAVE_GETTIMEOFDAY */
 115
 116 #ifndef HAVE_STRNLEN
 117 size_t strnlen(const char *s, size_t maxlen)
 118 {
 119         const char *end= (const char *)memchr(s, '\0', maxlen);
 120         return end ? (size_t) (end - s) : maxlen;
 121 }
 122 #endif
 123
 124 #ifndef HAVE_STRNDUP
 125 char* strndup(const char *s, size_t n)
 126 {
 127         size_t len = strnlen (s, n);
 128         char *new = (char *) malloc (len + 1);
 129
 130         if (new == NULL)
 131                 return NULL;
 132
 133         new[len] = '\0';
 134         return (char *) memcpy (new, s, len);
 135 }
 136 #endif