arg.h

   1 /* See the LICENSE file for copyright and license details. */
   2
   3 #ifndef __ARG_H__
   4 #define __ARG_H__
   5
   6 extern char *argv0;
   7
   8 #define USED(x)         ((void)(x))
   9
  10 /* use main(int argc, char *argv[]) */
  11 #define ARGBEGIN        for (argv0 = *argv, argv++, argc--;\
  12                                         argv[0] && argv[0][1]\
  13                                         && argv[0][0] == '-';\
  14                                         argc--, argv++) {\
  15                                 char _argc;\
  16                                 char **_argv;\
  17                                 int brk;\
  18                                 if (argv[0][1] == '-' && argv[0][2] == '\0') {\
  19                                         argv++;\
  20                                         argc--;\
  21                                         break;\
  22                                 }\
  23                                 for (brk = 0, argv[0]++, _argv = argv;\
  24                                                 argv[0][0] && !brk;\
  25                                                 argv[0]++) {\
  26                                         if (_argv != argv)\
  27                                                 break;\
  28                                         _argc = argv[0][0];\
  29                                         switch (_argc)
  30
  31 #define ARGEND                  }\
  32                                 USED(_argc);\
  33                         }\
  34                         USED(argv);\
  35                         USED(argc);
  36
  37 #define ARGC()          _argc
  38
  39 #define EARGF(x)        ((argv[0][1] == '\0' && argv[1] == NULL)?\
  40                                 ((x), abort(), (char *)0) :\
  41                                 (brk = 1, (argv[0][1] != '\0')?\
  42                                         (&argv[0][1]) :\
  43                                         (argc--, argv++, argv[0])))
  44
  45 #define ARGF()          ((argv[0][1] == '\0' && argv[1] == NULL)?\
  46                                 (char *)0 :\
  47                                 (brk = 1, (argv[0][1] != '\0')?\
  48                                         (&argv[0][1]) :\
  49                                         (argc--, argv++, argv[0])))
  50
  51 #endif
  52