KEK/raw_to_simh_bin.cpp
2022-03-13 11:53:32 +01:00

72 lines
1.6 KiB
C++

// this program is in the public domain
// written by Folkert van Heusden <mail@vanheusden.com>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
void put_byte(const uint8_t byte, int32_t *const csum, FILE *const fh)
{
*csum -= byte;
fputc(byte, fh);
}
int main(int argc, char *argv[])
{
if (argc != 5) {
fprintf(stderr, "Usage: %s file_in load_offset start_offset file_out\n", argv[0]);
fprintf(stderr, "Note: offsets must be decimal\n");
return 1;
}
const char *file_in = argv[1];
const uint32_t offset = atol(argv[2]);
const uint32_t start = atol(argv[3]);
const char *file_out = argv[4];
FILE *fh_in = fopen(file_in, "r");
FILE *fh_out = fopen(file_out, "wb");
fseek(fh_in, 0, SEEK_END);
uint32_t file_size = ftell(fh_in);
fseek(fh_in, 0, SEEK_SET);
int32_t csum = 0;
// header for the data itself
// after the data, a header will follow setting
// the start address
put_byte(0x01, &csum, fh_out);
put_byte(0x00, &csum, fh_out);
uint32_t temp = file_size + 6;
put_byte(temp & 255, &csum, fh_out);
put_byte(temp >> 8, &csum, fh_out);
put_byte(offset & 255, &csum, fh_out);
put_byte(offset >> 8, &csum, fh_out);
for(int i=0; i<file_size; i++) {
uint8_t c = fgetc(fh_in);
put_byte(c, &csum, fh_out);
}
fputc(csum & 0xff, fh_out);
put_byte(0x01, &csum, fh_out);
put_byte(0x00, &csum, fh_out);
put_byte(6, &csum, fh_out);
put_byte(0, &csum, fh_out);
put_byte(start & 255, &csum, fh_out);
put_byte(start >> 8, &csum, fh_out);
fclose(fh_out);
fclose(fh_in);
return 0;
}