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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio 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 Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <polyp/xmalloc.h>
#include <polypcore/log.h>
#include <polypcore/core-util.h>
#include "conf-parser.h"
#define WHITESPACE " \t\n"
#define COMMENTS "#;\n"
/* Run the user supplied parser for an assignment */
static int next_assignment(const char *filename, unsigned line, const pa_config_item *t, const char *lvalue, const char *rvalue, void *userdata) {
assert(filename && t && lvalue && rvalue);
for (; t->parse; t++)
if (!strcmp(lvalue, t->lvalue))
return t->parse(filename, line, lvalue, rvalue, t->data, userdata);
pa_log(__FILE__": [%s:%u] Unknown lvalue '%s'.", filename, line, lvalue);
return -1;
}
/* Returns non-zero when c is contained in s */
static int in_string(char c, const char *s) {
assert(s);
for (; *s; s++)
if (*s == c)
return 1;
return 0;
}
/* Remove all whitepsapce from the beginning and the end of *s. *s may
* be modified. */
static char *strip(char *s) {
char *b = s+strspn(s, WHITESPACE);
char *e, *l = NULL;
for (e = b; *e; e++)
if (!in_string(*e, WHITESPACE))
l = e;
if (l)
*(l+1) = 0;
return b;
}
/* Parse a variable assignment line */
static int parse_line(const char *filename, unsigned line, const pa_config_item *t, char *l, void *userdata) {
char *e, *c, *b = l+strspn(l, WHITESPACE);
if ((c = strpbrk(b, COMMENTS)))
*c = 0;
if (!*b)
return 0;
if (!(e = strchr(b, '='))) {
pa_log(__FILE__": [%s:%u] Missing '='.", filename, line);
return -1;
}
*e = 0;
e++;
return next_assignment(filename, line, t, strip(b), strip(e), userdata);
}
/* Go through the file and parse each line */
int pa_config_parse(const char *filename, FILE *f, const pa_config_item *t, void *userdata) {
int r = -1;
unsigned line = 0;
int do_close = !f;
assert(filename && t);
if (!f && !(f = fopen(filename, "r"))) {
if (errno == ENOENT) {
r = 0;
goto finish;
}
pa_log(__FILE__": WARNING: failed to open configuration file '%s': %s", filename, strerror(errno));
goto finish;
}
while (!feof(f)) {
char l[256];
if (!fgets(l, sizeof(l), f)) {
if (feof(f))
break;
pa_log(__FILE__": WARNING: failed to read configuration file '%s': %s", filename, strerror(errno));
goto finish;
}
if (parse_line(filename, ++line, t, l, userdata) < 0)
goto finish;
}
r = 0;
finish:
if (do_close && f)
fclose(f);
return r;
}
int pa_config_parse_int(const char *filename, unsigned line, const char *lvalue, const char *rvalue, void *data, PA_GCC_UNUSED void *userdata) {
int *i = data;
int32_t k;
assert(filename && lvalue && rvalue && data);
if (pa_atoi(rvalue, &k) < 0) {
pa_log(__FILE__": [%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
return -1;
}
*i = (int) k;
return 0;
}
int pa_config_parse_bool(const char *filename, unsigned line, const char *lvalue, const char *rvalue, void *data, PA_GCC_UNUSED void *userdata) {
int *b = data, k;
assert(filename && lvalue && rvalue && data);
if ((k = pa_parse_boolean(rvalue)) < 0) {
pa_log(__FILE__": [%s:%u] Failed to parse boolean value: %s", filename, line, rvalue);
return -1;
}
*b = k;
return 0;
}
int pa_config_parse_string(const char *filename, PA_GCC_UNUSED unsigned line, const char *lvalue, const char *rvalue, void *data, PA_GCC_UNUSED void *userdata) {
char **s = data;
assert(filename && lvalue && rvalue && data);
pa_xfree(*s);
*s = *rvalue ? pa_xstrdup(rvalue) : NULL;
return 0;
}
|
