Import rewritten arg.h from farbfeld

This commit is contained in:
Laslo Hunhold 2017-08-02 08:38:06 +02:00
parent ecb0d9e54e
commit 63bafbf1d1

106
arg.h
View file

@ -1,65 +1,55 @@
/*
* Copy me if you can.
* by 20h
* ISC-License
*
* (c) 2017 Laslo Hunhold <dev@frign.de>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef ARG_H__
#define ARG_H__
#ifndef ARG_H
#define ARG_H
extern char *argv0;
/* use main(int argc, char *argv[]) */
#define ARGBEGIN for (argv0 = *argv, argv++, argc--;\
argv[0] && argv[0][0] == '-'\
&& argv[0][1];\
argc--, argv++) {\
char argc_;\
char **argv_;\
int brk_;\
if (argv[0][1] == '-' && argv[0][2] == '\0') {\
argv++;\
argc--;\
break;\
}\
for (brk_ = 0, argv[0]++, argv_ = argv;\
argv[0][0] && !brk_;\
argv[0]++) {\
if (argv_ != argv)\
break;\
argc_ = argv[0][0];\
switch (argc_)
/* Handles obsolete -NUM syntax */
#define ARGNUM case '0':\
case '1':\
case '2':\
case '3':\
case '4':\
case '5':\
case '6':\
case '7':\
case '8':\
case '9'
#define ARGEND }\
}
#define ARGC() argc_
#define ARGNUMF() (brk_ = 1, estrtonum(argv[0], 0, INT_MAX))
#define EARGF(x) ((argv[0][1] == '\0' && argv[1] == NULL)?\
((x), abort(), (char *)0) :\
(brk_ = 1, (argv[0][1] != '\0')?\
(&argv[0][1]) :\
(argc--, argv++, argv[0])))
#define ARGF() ((argv[0][1] == '\0' && argv[1] == NULL)?\
(char *)0 :\
(brk_ = 1, (argv[0][1] != '\0')?\
(&argv[0][1]) :\
(argc--, argv++, argv[0])))
#define LNGARG() &argv[0][0]
/* int main(int argc, char *argv[]) */
#define ARGBEGIN for (argv0 = *argv, argc--, argv++; \
*argv && (*argv)[0] == '-' && (*argv)[1]; argc--, argv++) { \
int argparsed; \
if ((*argv)[1] == '-' && (*argv)[2] == '\0') { \
argc--, argv++; \
break; \
} \
for (argparsed = 0, (*argv)++; (*argv)[0]; (*argv)++) { \
switch((*argv)[0])
#define ARGEND if (argparsed) { \
if ((*argv)[1] != '\0') { \
break; \
} else { \
argc--, argv++; \
break; \
} \
} \
} \
}
#define ARGC() *argv[0]
#define ARGF_(x) (((*argv)[1] == '\0' && !*(argv + 1)) ? \
(x) : \
(argparsed = 1, ((*argv)[1] != '\0') ? \
(&(*argv)[1]) : \
(*(argv + 1)) \
) \
)
#define EARGF(x) ARGF_(((x), exit(1), (char *)0))
#define ARGF() ARGF_((char *)0)
#endif