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  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 /* DANGER!!!! These must be defined *BEFORE* replacements.h and the malloc() macro!!!! */
  31
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #ifdef HAVE_STRINGS_H
  35 #include <strings.h>
  36 #endif
  37 /*
  38  * clear_malloc
  39  *
  40  * will alloc memory and clear it
  41  */
  42 void *clear_malloc(size_t size)
  43 {
  44         void *t = malloc(size);
  45         if (t!=NULL)
  46         {
  47                 memset(t, 0x00, size);
  48         }
  49         return t;
  50 }
  51
  52 void *fill_malloc(size_t size)
  53 {
  54         void *t = malloc(size);
  55         if (t!=NULL)
  56         {
  57                 /* We want to initialize memory to some known bad state.  */
  58                 /* 0 and 0xff yields 0 and -1 as integers, which often          */
  59                 /* have meaningful values. 0x5555... is not often a valid       */
  60                 /* integer and is quite easily spotted in the debugger          */
  61                 /* also it is almost certainly an invalid address                                       */
  62                 memset(t, 0x55, size);
  63         }
  64         return t;
  65 }
  66
  67 #include "replacements.h"
  68
  69 #include <stdio.h>
  70
  71 /* replacements for gettimeofday */
  72 #ifndef HAVE_GETTIMEOFDAY
  73
  74 /* Windows */
  75 #ifdef _WIN32
  76
  77 #ifndef __GNUC__
  78 #define EPOCHFILETIME (116444736000000000i64)
  79 #else
  80 #define EPOCHFILETIME (116444736000000000LL)
  81 #endif
  82
  83 int gettimeofday(struct timeval *tv, struct timezone *tz)
  84 {
  85         FILETIME        ft;
  86         LARGE_INTEGER   li;
  87         __int64         t;
  88         static int      tzflag;
  89
  90         if (tv)
  91         {
  92                 GetSystemTimeAsFileTime(&ft);
  93                 li.LowPart  = ft.dwLowDateTime;
  94                 li.HighPart = ft.dwHighDateTime;
  95                 t  = li.QuadPart;                   /* In 100-nanosecond intervals */
  96                 t -= EPOCHFILETIME;                 /* Offset to the Epoch time */
  97                 t /= 10;                            /* In microseconds */
  98                 tv->tv_sec  = (long)(t / 1000000);
  99                 tv->tv_usec = (long)(t % 1000000);
 100         }
 101
 102         if (tz)
 103         {
 104                 if (!tzflag)
 105                 {
 106                         _tzset();
 107                         tzflag++;
 108                 }
 109                 tz->tz_minuteswest = _timezone / 60;
 110                 tz->tz_dsttime = _daylight;
 111         }
 112
 113         return 0;
 114 }
 115 #endif /* _WIN32 */
 116
 117 #endif /* HAVE_GETTIMEOFDAY */
 118
 119 #ifndef HAVE_STRNLEN
 120 size_t strnlen(const char *s, size_t maxlen)
 121 {
 122         const char *end= (const char *)memchr(s, '\0', maxlen);
 123         return end ? (size_t) (end - s) : maxlen;
 124 }
 125 #endif
 126
 127 #ifndef HAVE_STRNDUP
 128 char* strndup(const char *s, size_t n)
 129 {
 130         size_t len = strnlen (s, n);
 131         char *new = (char *) malloc (len + 1);
 132
 133         if (new == NULL)
 134                 return NULL;
 135
 136         new[len] = '\0';
 137         return (char *) memcpy (new, s, len);
 138 }
 139 #endif