include/file2c.c

   1 /*
   2  * ----------------------------------------------------------------------------
   3  * "THE BEER-WARE LICENSE" (Revision 42):
   4  * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
   5  * can do whatever you want with this stuff. If we meet some day, and you think
   6  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
   7  * ----------------------------------------------------------------------------
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13
  14 static void
  15 usage(void)
  16 {
  17
  18         fprintf(stderr, "usage: file2c [-n count] [-x] filename [prefix [suffix]]\n");
  19         exit(1);
  20 }
  21
  22 int
  23 main(int argc, char *argv[])
  24 {
  25         int c, count, linepos, maxcount, radix;
  26         FILE *fp;
  27
  28         maxcount = 0;
  29         radix = 10;
  30         while ((c = getopt(argc, argv, "n:x")) != -1) {
  31                 switch (c) {
  32                 case 'n':       /* Max. number of bytes per line. */
  33                         maxcount = strtol(optarg, NULL, 10);
  34                         break;
  35                 case 'x':       /* Print hexadecimal numbers. */
  36                         radix = 16;
  37                         break;
  38                 case '?':
  39                 default:
  40                         usage();
  41                 }
  42         }
  43         argc -= optind;
  44         argv += optind;
  45
  46         if (argc == 0)
  47             abort ();
  48         fp = fopen(argv[0], "rb");
  49         if (!fp)
  50             abort ();
  51
  52         if (argc > 1)
  53                 printf("%s\n", argv[1]);
  54         count = linepos = 0;
  55         while((c = fgetc(fp)) != EOF) {
  56                 if (count) {
  57                         putchar(',');
  58                         linepos++;
  59                 }
  60                 if ((maxcount == 0 && linepos > 70) ||
  61                     (maxcount > 0 && count >= maxcount)) {
  62                         putchar('\n');
  63                         count = linepos = 0;
  64                 }
  65                 switch (radix) {
  66                 case 10:
  67                         linepos += printf("%d", c);
  68                         break;
  69                 case 16:
  70                         linepos += printf("0x%02x", c);
  71                         break;
  72                 default:
  73                         abort();
  74                 }
  75                 count++;
  76         }
  77         fclose (fp);
  78         putchar('\n');
  79         if (argc > 2)
  80                 printf("%s\n", argv[2]);
  81         return (0);
  82 }