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makecrc-write-to-file.patch (850B)

    

  1. SPDX-FileCopyrightText: 2023 Paul Dersey <pdersey@gmail.com>
  3. SPDX-License-Identifier: GPL-2.0-or-later
  5. Modify makecrc so that it outputs C code to a file that
  6. can be appended to util.c
  8. --- gzip-1.2.4/sample/makecrc.c
  9. +++ gzip-1.2.4/sample/makecrc.c
  10. @@ -47,7 +47,9 @@ main()
  11.      e |= 1L << (31 - p[i]);
  12.  
  13.    /* Compute and print table of CRC's, five per line */
  14. -  printf("  0x00000000L");
  15. +  FILE *output = fopen("crc.c", "w");
  16. +  fprintf(output, "ulg crc_32_tab[] = {\n");
  17. +  fprintf(output,"  0x00000000L");
  18.    for (i = 1; i < 256; i++)
  19.    {
  20.      c = i;
  21. @@ -56,8 +58,8 @@ main()
  22.       */
  23.      for (k = 8; k; k--)
  24.        c = c & 1 ? (c >> 1) ^ e : c >> 1;
  25. -    printf(i % 5 ? ", 0x%08lxL" : ",\n  0x%08lxL", c);
  26. +    fprintf(output, i % 5 ? ", 0x%08lxL" : ",\n  0x%08lxL", c);
  27.    }
  28. -  putchar('\n');
  29. +  fprintf(output,"\n};\n");
  30.    return 0;
  31.  }