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	arg.h - blind - suckless command-line video editing utility
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	arg.h (1781B)
	---
	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 /* use main(int argc, char argv[]) /
	12 #define ARGBEGIN for (argv0 = *argv, argv++, argc--;\
	13 argv[0] && argv[0][0] && argv[0]…
	14 argc--, argv++) {\
	15 char argc_;\
	16 char **argv_;\
	17 int brk_;\
	18 if (argv[0][0] == '-') {\
	19 if (argv[0][1] == '-' && argv[0]…
	20 argv++;\
	21 argc--;\
	22 break;\
	23 }\
	24 for (brk_ = 0, argv[0]++, argv_ …
	25 argv[0][0] && !b…
	26 argv[0]++) {\
	27 if (argv_ != argv)\
	28 break;\
	29 argc_ = argv[0][0];\
	30 switch (argc_)
	31
	32 /* Handles obsolete -NUM syntax */
	33 #define ARGNUM case '0':\
	34 case '1':\
	35 case '2':\
	36 case '3':\
	37 case '4':\
	38 case '5':\
	39 case '6':\
	40 case '7':\
	41 case '8':\
	42 case '9'
	43
	44 #define ARGALT(SYMBOL) }\
	45 } else if (argv[0][0] == SYMBOL) {\
	46 for (brk_ = 0, argv[0]++, argv_ …
	47 argv[0][0] && !b…
	48 argv[0]++) {\
	49 if (argv_ != argv)\
	50 break;\
	51 argc_ = argv[0][0];\
	52 switch (argc_)
	53
	54 #define ARGEND }\
	55 } else {\
	56 break;\
	57 }\
	58 }
	59
	60 #define ARGC() argc_
	61
	62 #define ARGNUMF() (brk_ = 1, estrtonum(argv[0], 0, INT_MAX))
	63
	64 #define EARGF(x) ((argv[0][1] == '\0' && argv[1] == NULL)?\
	65 ((x), abort(), (char *)0) :\
	66 (brk_ = 1, (argv[0][1] != '\0')?\
	67 (&argv[0][1]) :\
	68 (argc--, argv++, argv[0])))
	69
	70 #define ARGF() ((argv[0][1] == '\0' && argv[1] == NULL)?\
	71 (char *)0 :\
	72 (brk_ = 1, (argv[0][1] != '\0')?\
	73 (&argv[0][1]) :\
	74 (argc--, argv++, argv[0])))
	75
	76 #define UARGF() EARGF(usage())
	77
	78 #define LNGARG() &argv[0][0]
	79
	80 #define UNOFLAGS(...) ARGBEGIN {\
	81 default:\
	82 usage();\
	83 } ARGEND;\
	84 if (__VA_ARGS__)\
	85 usage()
	86
	87
	88 #endif