mirror of https://github.com/nmlgc/ReC98.git
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include "./common.h"
|
|
static const char copyright[] = "comcstm (c)O.Morikawa 1996";
|
|
#define HEADER_SIZE (3+2+2+2+4+sizeof(copyright)-1)
|
|
int __cdecl main(int argc, char **argv) {
|
|
FILE *fo;
|
|
long sz_usage, sz_program;
|
|
int tmp;
|
|
if(argc != 6) {
|
|
printf("Usage: comcstm usage.txt prog.com cstmstub.bin timestamp output.com\n");
|
|
return 1;
|
|
}
|
|
|
|
sz_usage = filesize(argv[1]);
|
|
if(sz_usage == -1) return 3;
|
|
sz_program = filesize(argv[2]);
|
|
if(sz_program == -1) return 3;
|
|
fo = fopen(argv[5], "wb");
|
|
if(!fo) {
|
|
printf("Error: couldn't open file '%s': %s\n", argv[5], strerror(errno));
|
|
return 2;
|
|
}
|
|
|
|
fputc('\xE9', fo); /* jmp rel16 */
|
|
fputw(0x100 + HEADER_SIZE + sz_usage + sz_program - 0x103, fo);
|
|
fputw(0x100 + HEADER_SIZE, fo); /* 103: usage offset */
|
|
fputw(sz_usage, fo); /* 105: usage size */
|
|
fputw(sz_program, fo); /* 107: program size */
|
|
/* 109: looks like an msdos timestamp */
|
|
/* th04: 0x25098623 = 621381155 */
|
|
/* th05: 0x2579AF64 = 628731748 */
|
|
fputd(atol(argv[4]), fo);
|
|
fputs(copyright, fo);
|
|
fflush(fo);
|
|
if(append(argv[1], fo) || append(argv[2], fo) || append(argv[3], fo)) {
|
|
fclose(fo);
|
|
return 3;
|
|
}
|
|
if(fclose(fo)) {
|
|
printf("Error while closing outfile\n");
|
|
return 4;
|
|
}
|
|
return 0;
|
|
}
|