tools/n64cksum.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 #include "libsm64.h"
   5 #include "utils.h"
   6
   7 #define N64CKSUM_VERSION "0.1"
   8
   9 static void print_usage(void)
  10 {
  11    ERROR("Usage: n64cksum ROM [ROM_OUT]\n"
  12          "\n"
  13          "n64cksum v" N64CKSUM_VERSION ": N64 ROM checksum calculator\n"
  14          "\n"
  15          "File arguments:\n"
  16          " ROM          input ROM file\n"
  17          " ROM_OUT      output ROM file (default: overwrites input ROM)\n");
  18 }
  19
  20 int main(int argc, char *argv[])
  21 {
  22    unsigned char *rom_data;
  23    char *file_in;
  24    char *file_out;
  25    long length;
  26    long write_length;
  27    if (argc < 2) {
  28       print_usage();
  29       return EXIT_FAILURE;
  30    }
  31
  32    file_in = argv[1];
  33    if (argc > 2) {
  34       file_out = argv[2];
  35    } else {
  36       file_out = argv[1];
  37    }
  38
  39    length = read_file(file_in, &rom_data);
  40    if (length < 0) {
  41       ERROR("Error reading input file \"%s\"\n", file_in);
  42       return EXIT_FAILURE;
  43    }
  44
  45    sm64_update_checksums(rom_data);
  46
  47    write_length = write_file(file_out, rom_data, length);
  48
  49    free(rom_data);
  50
  51    if (write_length != length) {
  52       ERROR("Error writing to output file \"%s\"\n", file_out);
  53       return EXIT_FAILURE;
  54    }
  55
  56    return EXIT_SUCCESS;
  57 }