arg.h

   1 /* See LICENSE file for copyright and license details. */
   2 #ifndef ARG_H
   3 #define ARG_H
   4
   5 extern char *argv0;
   6
   7 /* int main(int argc, char *argv[]) */
   8 #define ARGBEGIN for (argv0 = *argv, *argv ? (argc--, argv++) : ((void *)0);      \
   9                       *argv && (*argv)[0] == '-' && (*argv)[1]; argc--, argv++) { \
  10                         int i_, argused_;                                         \
  11                         if ((*argv)[1] == '-' && !(*argv)[2]) {                   \
  12                                 argc--, argv++;                                   \
  13                                 break;                                            \
  14                         }                                                         \
  15                         for (i_ = 1, argused_ = 0; (*argv)[i_]; i_++) {           \
  16                                 switch((*argv)[i_])
  17 #define ARGEND                  if (argused_) {                                   \
  18                                         if ((*argv)[i_ + 1]) {                    \
  19                                                 break;                            \
  20                                         } else {                                  \
  21                                                 argc--, argv++;                   \
  22                                                 break;                            \
  23                                         }                                         \
  24                                 }                                                 \
  25                         }                                                         \
  26                  }
  27 #define ARGC()   ((*argv)[i_])
  28 #define ARGF_(x) (((*argv)[i_ + 1]) ? (argused_ = 1, &((*argv)[i_ + 1])) :        \
  29                   (*(argv + 1))     ? (argused_ = 1, *(argv + 1))        : (x))
  30 #define EARGF(x) ARGF_(((x), exit(1), (char *)0))
  31 #define ARGF()   ARGF_((char *)0)
  32
  33 #endif