com32/lib/syslinux/zloadfile.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2005-2008 H. Peter Anvin - All Rights Reserved
   4  *
   5  *   Permission is hereby granted, free of charge, to any person
   6  *   obtaining a copy of this software and associated documentation
   7  *   files (the "Software"), to deal in the Software without
   8  *   restriction, including without limitation the rights to use,
   9  *   copy, modify, merge, publish, distribute, sublicense, and/or
  10  *   sell copies of the Software, and to permit persons to whom
  11  *   the Software is furnished to do so, subject to the following
  12  *   conditions:
  13  *
  14  *   The above copyright notice and this permission notice shall
  15  *   be included in all copies or substantial portions of the Software.
  16  *
  17  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  19  *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20  *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  21  *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  *   OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * ----------------------------------------------------------------------- */
  27
  28 /*
  29  * zloadfile.c
  30  *
  31  * Read the contents of a possibly compressed data file into a malloc'd buffer
  32  */
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <unistd.h>
  37 #include <string.h>
  38 #include <fcntl.h>
  39 #include <sys/stat.h>
  40 #include <syslinux/zio.h>
  41
  42 #include <syslinux/loadfile.h>
  43
  44 #define INCREMENTAL_CHUNK 1024*1024
  45
  46 int zloadfile(const char *filename, void **ptr, size_t * len)
  47 {
  48     FILE *f;
  49     int rv;
  50
  51     f = zfopen(filename, "r");
  52     if (!f)
  53         return -1;
  54
  55     rv = floadfile(f, ptr, len, NULL, 0);
  56     fclose(f);
  57
  58     return rv;
  59 }