arg.h - farbfeld - suckless image format with conversion tools
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---
arg.h (2504B)
---
1 /*
2 * ISC-License
3 *
4 * Copyright 2004-2017 Christoph Lohmann <20h@r-36.net>
5 * Copyright 2017-2018 Laslo Hunhold <dev@frign.de>
6 *
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19 #ifndef ARG_H
20 #define ARG_H
21
22 extern char *argv0;
23
24 /* int main(int argc, char *argv[]) */
25 #define ARGBEGIN for (argv0 = *argv, *argv ? (argc--, argv++) : ((void *)0); \
26 *argv && (*argv)[0] == '-' && (*argv)[1]; argc--, argv++) { \
27 int i_, argused_; \
28 if ((*argv)[1] == '-' && !(*argv)[2]) { \
29 argc--, argv++; \
30 break; \
31 } \
32 for (i_ = 1, argused_ = 0; (*argv)[i_]; i_++) { \
33 switch((*argv)[i_])
34 #define ARGEND if (argused_) { \
35 if ((*argv)[i_ + 1]) { \
36 break; \
37 } else { \
38 argc--, argv++; \
39 break; \
40 } \
41 } \
42 } \
43 }
44 #define ARGC() ((*argv)[i_])
45 #define ARGF_(x) (((*argv)[i_ + 1]) ? (argused_ = 1, &((*argv)[i_ + 1])) : \
46 (*(argv + 1)) ? (argused_ = 1, *(argv + 1)) : (x))
47 #define EARGF(x) ARGF_(((x), exit(1), (char *)0))
48 #define ARGF() ARGF_((char *)0)
49
50 #endif