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// Mike wrote this.
#define FOR_OPTS(argc, argv) \
for ( \
const char *_p = (--(argc), *++(argv)), *_p1; \
argc && *_p == '-' && *++_p && \
(*_p != '-' || _p[1] || (++(argv), --(argc), 0)); \
_p = *++(argv), --(argc), (void)(_p1) /* suppress unused warning */ \
) \
while (*_p) \
switch (*_p++) \
if (0) default: { \
fprintf(stderr, "invalid option: -%c\n", _p[-1]); \
usage(); \
} \
else /* { cases/code here } */
#define OPTARG(argc, argv) \
(*_p ? (_p1 = _p, _p = "", _p1) : (*(--(argc), ++(argv)) ? *(argv) : \
(fprintf(stderr, "missing argument for option -%c\n", _p[-1]), \
usage(), (char *)0)))
// vi: sw=4 ts=4 noet tw=80 cc=80
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