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/* $Id: splitbios.c,v 1.2 2009-01-28 17:20:10 potyra Exp $
*
* Copyright (C) 2008-2009 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static const char *progname;
static unsigned int rom_width;
static unsigned int img_width;
static unsigned int rom_size;
static unsigned int img_size;
static const char *img;
static void
biossplit(void)
{
unsigned char byte[1024*1024 + 1];
unsigned int count;
unsigned int pos;
unsigned int r;
unsigned int p;
int fdin;
int fdout[16];
int ret;
/*
* Read image.
*/
fdin = open(img, O_RDONLY);
assert(0 <= fdin);
ret = read(fdin, byte, sizeof(byte));
assert(0 <= ret);
assert(ret < sizeof(byte));
img_size = ret;
ret = close(fdin);
assert(0 <= ret);
/*
* Write image to several files.
*/
count = 0;
for (pos = 0; pos < img_size; ) {
/*
* Open ROM images.
*/
for (r = 0; r < img_width / rom_width; r++) {
char name[1024];
sprintf(name, "%s-%u", img, count++);
fdout[r] = open(name, O_WRONLY | O_CREAT, 0666);
assert(0 <= fdout[r]);
}
/*
* Write ROM images.
*/
for (p = 0; p < rom_size; p += rom_width) {
for (r = 0; r < img_width / rom_width; r++) {
ret = write(fdout[r], &byte[pos], rom_width);
assert(ret == rom_width);
pos += rom_width;
}
}
/*
* Close ROM images.
*/
for (r = 0; r < img_width / rom_width; r++) {
ret = close(fdout[r]);
assert(0 <= ret);
}
}
}
static void __attribute__((__noreturn__))
usage(int retval)
{
fprintf(stderr, "Usage: %s <romwidth> <imgwidth> <romsize> <img>\n",
progname);
exit(retval);
}
int
main(int argc, char **argv)
{
int c;
/*
* Get program name.
*/
progname = *argv;
/*
* Get options.
*/
while ((c = getopt(argc, argv, "")) != -1) {
switch (c) {
default:
usage(1);
}
}
argc -= optind;
argv += optind;
/*
* Get arguments.
*/
if (argc == 0) {
usage(1);
}
rom_width = atoi(*argv);
argc--;
argv++;
if (argc == 0) {
usage(1);
}
img_width = atoi(*argv);
argc--;
argv++;
if (argc == 0) {
usage(1);
}
rom_size = atoi(*argv);
argc--;
argv++;
if (argc == 0) {
usage(1);
}
img = *argv;
argc--;
argv++;
if (argc != 0) {
usage(1);
}
/*
* Check arguments.
*/
/* FIXME */
biossplit();
return 0;
}
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