source: trunk/tools/neercs/old/mygetopt.c @ 2183

Last change on this file since 2183 was 2183, checked in by sam, 7 years ago

build: fix the WTFPL site URL in all code comments.

  • Property svn:keywords set to Id
File size: 3.2 KB
Line 
1/*
2 *  neercs        console-based window manager
3 *  Copyright (c) 2006-2010 Sam Hocevar <sam@hocevar.net>
4 *                2008-2010 Jean-Yves Lamoureux <jylam@lnxscene.org>
5 *                All Rights Reserved
6 *
7 *  This program is free software. It comes without any warranty, to
8 *  the extent permitted by applicable law. You can redistribute it
9 *  and/or modify it under the terms of the Do What The Fuck You Want
10 *  To Public License, Version 2, as published by Sam Hocevar. See
11 *  http://www.wtfpl.net/ for more details.
12 */
13
14/*
15 *  mygetopt.c: getopt_long reimplementation
16 */
17
18#if defined HAVE_CONFIG_H
19#   include "config.h"
20#endif
21
22#include <stdio.h>
23#include <string.h>
24
25#include "caca_types.h"
26
27#include "mygetopt.h"
28
29int myoptind = 1;
30char *myoptarg = NULL;
31
32/* XXX: this getopt_long implementation should not be trusted for other
33   applications without any serious peer reviewing. It “just works” with
34   zzuf but may fail miserably in other programs. */
35int mygetopt(int argc, char *const _argv[], const char *optstring,
36             const struct myoption *longopts, int *longindex)
37{
38    char **argv = (char **)(uintptr_t) _argv;
39    char *flag;
40    int i;
41
42    if (myoptind >= argc)
43        return -1;
44
45    flag = argv[myoptind];
46
47    if (flag[0] == '-' && flag[1] != '-')
48    {
49        char const *tmp;
50        int ret = flag[1];
51
52        if (ret == '\0')
53            return -1;
54
55        tmp = strchr(optstring, ret);
56        if (!tmp || ret == ':')
57            return '?';
58
59        myoptind++;
60        if (tmp[1] == ':')
61        {
62            if (flag[2] != '\0')
63                myoptarg = flag + 2;
64            else if (myoptind >= argc)
65            {
66                if (tmp[2] != ':')
67                {
68                    fprintf(stderr, "%s: `%s' needs an argument\n", argv[0],
69                            flag);
70                    return -2;
71                }
72            }
73            else
74                myoptarg = argv[myoptind++];
75            return ret;
76        }
77
78        if (flag[2] != '\0')
79        {
80            flag[1] = '-';
81            myoptind--;
82            argv[myoptind]++;
83        }
84
85        return ret;
86    }
87
88    if (flag[0] == '-' && flag[1] == '-')
89    {
90        if (flag[2] == '\0')
91            return -1;
92
93        for (i = 0; longopts[i].name; i++)
94        {
95            size_t l = strlen(longopts[i].name);
96
97            if (strncmp(flag + 2, longopts[i].name, l))
98                continue;
99
100            switch (flag[2 + l])
101            {
102            case '=':
103                if (!longopts[i].has_arg)
104                    goto bad_opt;
105                if (longindex)
106                    *longindex = i;
107                myoptind++;
108                myoptarg = flag + 2 + l + 1;
109                return longopts[i].val;
110            case '\0':
111                if (longindex)
112                    *longindex = i;
113                myoptind++;
114                if (longopts[i].has_arg)
115                    myoptarg = argv[myoptind++];
116                return longopts[i].val;
117            default:
118                break;
119            }
120        }
121      bad_opt:
122        fprintf(stderr, "%s: unrecognized option `%s'\n", argv[0], flag);
123        return '?';
124    }
125
126    return -1;
127}
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