1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/**
* Copyright © 2016 Mattias Andrée <maandree@member.fsf.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* The name of the process.
*/
extern char *argv0;
/**
* Start command line parsing.
*
* `argv` and `argc` must be available as given to `main`.
* The global variable `argv0` must be declare (not necessary
* the the same file) and will be set to `argv[0]`.
*
* Only short options and "--" are supported. Short options
* may start with a '+', in which case `plus` will be 1.
*
* @example
* ARGBEGIN {
* case 'a': printf("%s\n", plus ? "+a" : "-a"); break;
* case 'b': if (plus) usage(1); printf("-b\n"); break;
* case 'c': if (plus) printf("+c\n"); else printf("-c %s\n", ARGF()); break;
* default: usage(1); break;
* } ARGEND;
*/
#define ARGBEGIN \
do { \
for (argv0 = *argv++, argc -= !!argv0; *argv; argv++, argc--) { \
int plus = argv[0][0] == '+', next__ = 0; \
if (((argv[0][0] != '-') && !plus) || (argv[0][1] == (plus ? '+' : '-'))) { \
if ((argv[0][0] == argv[0][1]) && (argv[0][1] == '-') && (argv[0][2] == '\0')) \
argc--, argv++; \
break; \
} \
for (argv[0]++; argv[0][0] && !next__;) { \
switch (*(argv[0])++)
/**
* End of command line parsing,
*/
#define ARGEND \
} \
} \
} while (0)
/**
* Get the argument of the current option.
* Do not use more once per option.
*
* The function `noreturn void usage(int)` must be available.
* `usage` shall exit if its argument is `1`.
*
* @return The argument of the current option.
*/
#define ARGF() \
(next__ = 1, argv[0][0] ? (argv[0]) \
: (argv++, (argv[0] ? (argc--, argv[0]) \
: (usage(1), NULL))))
|
