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/*
* Argument processing macros
* I got tired of rethinking this everytime,
* and 4xbsd doesn't have getopt()
*
* The following is an example of the use of this stuff
*
#include "args.h"
#include <stdio.h>
main(argc, argv)
char **argv;
{
char *a = "a", *b = "b", *c = "c";
int x = 0, y = 0, z = 0;
ARGLOOP
STRINGARG(a) a = p; ENDSTRINGARG
STRINGARG(b) b = p; ENDSTRINGARG
STRINGARG(c) c = p; ENDSTRINGARG
FLAGARG(x) x++; ENDFLAGARG
FLAGARG(y) y++; ENDFLAGARG
FLAGARG(z) z++; ENDFLAGARG
BADARG
fprintf(stderr, "unknown option %c\n", *p);
fprintf(stderr, "Usage: usage\n");
exit(1);
ENDBADARG
ENDARGLOOP
Here, the remaining args are argv[0] to argv[argc - 1]
printf("a=%s b=%s c=%s x=%d y=%d z=%d\nargs:", a, b, c, x, y, z);
{ int i; for(i = 0; i < argc; i++)
printf(" %s", argv[i]);
}
printf("\n");
}
*
*/
#define ARGLOOP \
while(--argc > 0 && **++argv == '-') { \
register char *p; \
for(p = *argv + 1; *p != '\0'; p++) { \
switch(*p) { \
#define ENDARGLOOP \
} \
} \
nextarg:; \
} \
#define FLAGARG(c) case c:
#define ENDFLAGARG break;
#define STRINGARG(c) case c: if(!*++p) p = *++argv, argc--;
#define ENDSTRINGARG goto nextarg;
#define BADARG default:
#define ENDBADARG break;
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