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/* Copyright 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* This is a very simple binary editor, used to create corrupted structs for
* testing. It copies stdin to stdout, replacing bytes beginning at the given
* offset with the specified 8-bit values.
*
* There is NO conversion checking of the arguments.
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
uint32_t offset, curpos, curarg;
int c;
if (argc < 3) {
fprintf(stderr, "Need two or more args: OFFSET VAL [VAL...]\n");
return 1;
}
offset = (uint32_t)strtoul(argv[1], 0, 0);
curarg = 2;
for ( curpos = 0; (c = fgetc(stdin)) != EOF; curpos++) {
if (curpos == offset && curarg < argc) {
c = (uint8_t)strtoul(argv[curarg++], 0, 0);
offset++;
}
fputc(c, stdout);
}
return 0;
}
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