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/* ----------------------------------------------------------------------- *
*
* Copyright 2005 H. Peter Anvin - All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 53 Temple Place Ste 330,
* Boston MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/*
* loadfile.c
*
* Read the contents of a data file into a malloc'd buffer
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "loadfile.h"
int loadfile(const char *filename, void **ptr, size_t *len)
{
int fd;
struct stat st;
void *data;
FILE *f;
size_t xlen;
fd = open(filename, O_RDONLY);
if ( fd < 0 )
return -1;
f = fdopen(fd, "rb");
if ( !f ) {
close(fd);
return -1;
}
if ( fstat(fd, &st) )
goto err_fclose;
*len = st.st_size;
xlen = (st.st_size + LOADFILE_ZERO_PAD-1) & ~(LOADFILE_ZERO_PAD-1);
*ptr = data = malloc(xlen);
if ( !data )
goto err_fclose;
if ( (off_t)fread(data, 1, st.st_size, f) != st.st_size )
goto err_free;
memset((char *)data + st.st_size, 0, xlen-st.st_size);
fclose(f);
return 0;
err_free:
free(data);
err_fclose:
fclose(f);
return -1;
}
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