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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* Copyright 2008-2013 Various Authors
* Copyright 2005 Timo Hirvonen
*
* 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 2 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/>.
*/
#include "prog.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
char *program_name = NULL;
void warn(const char *format, ...)
{
va_list ap;
fprintf(stderr, "%s: ", program_name);
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
}
void warn_errno(const char *format, ...)
{
int e = errno;
va_list ap;
fprintf(stderr, "%s: ", program_name);
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
fprintf(stderr, ": %s\n", strerror(e));
}
void CMUS_NORETURN die(const char *format, ...)
{
va_list ap;
fprintf(stderr, "%s: ", program_name);
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
exit(1);
}
void CMUS_NORETURN die_errno(const char *format, ...)
{
int e = errno;
va_list ap;
fprintf(stderr, "%s: ", program_name);
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
fprintf(stderr, ": %s\n", strerror(e));
exit(1);
}
static int short_option(int ch, const struct option *options)
{
int i;
for (i = 0; ; i++) {
if (!options[i].short_opt) {
if (!options[i].long_opt)
die("unrecognized option `-%c'\n", ch);
continue;
}
if (options[i].short_opt != ch)
continue;
return i;
}
}
static int long_option(const char *opt, const struct option *options)
{
int len, i, idx, num;
len = strlen(opt);
idx = -1;
num = 0;
for (i = 0; options[i].short_opt || options[i].long_opt; i++) {
if (options[i].long_opt && strncmp(opt, options[i].long_opt, len) == 0) {
idx = i;
num++;
if (options[i].long_opt[len] == 0) {
/* exact */
num = 1;
break;
}
}
}
if (num > 1)
die("option `--%s' is ambiguous\n", opt);
if (num == 0)
die("unrecognized option `--%s'\n", opt);
return idx;
}
int get_option(char **argvp[], const struct option *options, char **arg)
{
char **argv = *argvp;
const char *opt = *argv;
int i;
*arg = NULL;
if (opt == NULL || opt[0] != '-' || opt[1] == 0)
return -1;
if (opt[1] == '-') {
if (opt[2] == 0) {
/* '--' => no more options */
*argvp = argv + 1;
return -1;
}
i = long_option(opt + 2, options);
} else if (opt[2]) {
return -1;
} else {
i = short_option(opt[1], options);
}
argv++;
if (options[i].has_arg) {
if (*argv == NULL)
die("option `%s' requires an argument\n", opt);
*arg = *argv++;
}
*argvp = argv;
return i;
}
|
