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zopflib/src/zopfli/zopfli_bin.c  view on Meta::CPAN

    fprintf(stderr, "Invalid filename: %s\n", infilename);
    return;
  }

  ZopfliCompress(options, output_type, in, insize, &out, &outsize);

  if (outfilename) {
    SaveFile(outfilename, out, outsize);
  } else {
    size_t i;
#if _WIN32
    /* Windows workaround for stdout output. */
    _setmode(_fileno(stdout), _O_BINARY);
#endif
    for (i = 0; i < outsize; i++) {
      printf("%c", out[i]);
    }
  }

  free(out);
  free(in);
}

/*
Add two strings together. Size does not matter. Result must be freed.
*/
static char* AddStrings(const char* str1, const char* str2) {
  size_t len = strlen(str1) + strlen(str2);
  char* result = (char*)malloc(len + 1);
  if (!result) exit(-1); /* Allocation failed. */
  strcpy(result, str1);
  strcat(result, str2);
  return result;
}

static char StringsEqual(const char* str1, const char* str2) {
  return strcmp(str1, str2) == 0;
}

int main(int argc, char* argv[]) {
  ZopfliOptions options;
  ZopfliFormat output_type = ZOPFLI_FORMAT_GZIP;
  const char* filename = 0;
  int output_to_stdout = 0;
  int i;

  ZopfliInitOptions(&options);

  for (i = 1; i < argc; i++) {
    const char* arg = argv[i];
    if (StringsEqual(arg, "-v")) options.verbose = 1;
    else if (StringsEqual(arg, "-c")) output_to_stdout = 1;
    else if (StringsEqual(arg, "--deflate")) {
      output_type = ZOPFLI_FORMAT_DEFLATE;
    }
    else if (StringsEqual(arg, "--zlib")) output_type = ZOPFLI_FORMAT_ZLIB;
    else if (StringsEqual(arg, "--gzip")) output_type = ZOPFLI_FORMAT_GZIP;
    else if (StringsEqual(arg, "--splitlast"))  /* Ignore */;
    else if (arg[0] == '-' && arg[1] == '-' && arg[2] == 'i'
        && arg[3] >= '0' && arg[3] <= '9') {
      options.numiterations = atoi(arg + 3);
    }
    else if (StringsEqual(arg, "-h")) {
      fprintf(stderr,
          "Usage: zopfli [OPTION]... FILE...\n"
          "  -h    gives this help\n"
          "  -c    write the result on standard output, instead of disk"
          " filename + '.gz'\n"
          "  -v    verbose mode\n"
          "  --i#  perform # iterations (default 15). More gives"
          " more compression but is slower."
          " Examples: --i10, --i50, --i1000\n");
      fprintf(stderr,
          "  --gzip        output to gzip format (default)\n"
          "  --zlib        output to zlib format instead of gzip\n"
          "  --deflate     output to deflate format instead of gzip\n"
          "  --splitlast   ignored, left for backwards compatibility\n");
      return 0;
    }
  }

  if (options.numiterations < 1) {
    fprintf(stderr, "Error: must have 1 or more iterations\n");
    return 0;
  }

  for (i = 1; i < argc; i++) {
    if (argv[i][0] != '-') {
      char* outfilename;
      filename = argv[i];
      if (output_to_stdout) {
        outfilename = 0;
      } else if (output_type == ZOPFLI_FORMAT_GZIP) {
        outfilename = AddStrings(filename, ".gz");
      } else if (output_type == ZOPFLI_FORMAT_ZLIB) {
        outfilename = AddStrings(filename, ".zlib");
      } else {
        assert(output_type == ZOPFLI_FORMAT_DEFLATE);
        outfilename = AddStrings(filename, ".deflate");
      }
      if (options.verbose && outfilename) {
        fprintf(stderr, "Saving to: %s\n", outfilename);
      }
      CompressFile(&options, output_type, filename, outfilename);
      free(outfilename);
    }
  }

  if (!filename) {
    fprintf(stderr,
            "Please provide filename\nFor help, type: %s -h\n", argv[0]);
  }

  return 0;
}