arg.h

   1 /*
   2  * Copy me if you can.
   3  * by 20h
   4  */
   5
   6 #ifndef __ARG_H__
   7 #define __ARG_H__
   8
   9 extern char *argv0;
  10
  11 #define USED(x)         ((void)(x))
  12
  13 /* use main(int argc, char *argv[]) */
  14 #define ARGBEGIN        for (argv0 = *argv, argv++, argc--;\
  15                                         argv[0] && argv[0][1]\
  16                                         && argv[0][0] == '-';\
  17                                         argc--, argv++) {\
  18                                 char _argc;\
  19                                 char **_argv;\
  20                                 int brk;\
  21                                 if (argv[0][1] == '-' && argv[0][2] == '\0') {\
  22                                         argv++;\
  23                                         argc--;\
  24                                         break;\
  25                                 }\
  26                                 for (brk = 0, argv[0]++, _argv = argv;\
  27                                                 argv[0][0] && !brk;\
  28                                                 argv[0]++) {\
  29                                         if (_argv != argv)\
  30                                                 break;\
  31                                         _argc = argv[0][0];\
  32                                         switch (_argc)
  33
  34 #define ARGEND                  }\
  35                                 USED(_argc);\
  36                         }\
  37                         USED(argv);\
  38                         USED(argc);
  39
  40 #define ARGC()          _argc
  41
  42 #define EARGF(x)        ((argv[0][1] == '\0' && argv[1] == NULL)?\
  43                                 ((x), abort(), (char *)0) :\
  44                                 (brk = 1, (argv[0][1] != '\0')?\
  45                                         (&argv[0][1]) :\
  46                                         (argc--, argv++, argv[0])))
  47
  48 #define ARGF()          ((argv[0][1] == '\0' && argv[1] == NULL)?\
  49                                 (char *)0 :\
  50                                 (brk = 1, (argv[0][1] != '\0')?\
  51                                         (&argv[0][1]) :\
  52                                         (argc--, argv++, argv[0])))
  53
  54 #endif
  55