ini-file-parser.c revision a97605e07ad7f44f2f65e15be64880e61a39ab43 
1/* $Id$ */
2
3/***
4  This file is part of avahi.
5
6  avahi is free software; you can redistribute it and/or modify it
7  under the terms of the GNU Lesser General Public License as
8  published by the Free Software Foundation; either version 2.1 of the
9  License, or (at your option) any later version.
10
11  avahi is distributed in the hope that it will be useful, but WITHOUT
12  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14  Public License for more details.
15
16  You should have received a copy of the GNU Lesser General Public
17  License along with avahi; if not, write to the Free Software
18  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19  USA.
20***/
21
22#ifdef HAVE_CONFIG_H
23#include <config.h>
24#endif
25
26#include <stdio.h>
27#include <string.h>
28#include <errno.h>
29#include <ctype.h>
30
31#include <avahi-common/malloc.h>
32#include <avahi-core/log.h>
33
34#include "ini-file-parser.h"
35
36AvahiIniFile* avahi_ini_file_load(const char *fname) {
37    AvahiIniFile *f;
38    FILE *fo;
39    AvahiIniFileGroup *group = NULL;
40    unsigned line;
41
42    assert(fname);
43
44    if (!(fo = fopen(fname, "r"))) {
45        avahi_log_error("Failed to open file '%s': %s", fname, strerror(errno));
46        return NULL;
47    }
48
49    f = avahi_new(AvahiIniFile, 1);
50    AVAHI_LLIST_HEAD_INIT(AvahiIniFileGroup, f->groups);
51    f->n_groups = 0;
52
53    line = 0;
54    while (!feof(fo)) {
55        char ln[256], *s, *e;
56        AvahiIniFilePair *pair;
57
58        if (!(fgets(ln, sizeof(ln), fo)))
59            break;
60
61        line++;
62
63        s = ln + strspn(ln, " \t");
64        s[strcspn(s, "\r\n")] = 0;
65
66        /* Skip comments and empty lines */
67        if (*s == '#' || *s == '%' || *s == 0)
68            continue;
69
70        if (*s == '[') {
71            /* new group */
72
73            if (!(e = strchr(s, ']'))) {
74                avahi_log_error("Unclosed group header in %s:%u: <%s>", fname, line, s);
75                goto fail;
76            }
77
78            *e = 0;
79
80            group = avahi_new(AvahiIniFileGroup, 1);
81            group->name = avahi_strdup(s+1);
82            group->n_pairs = 0;
83            AVAHI_LLIST_HEAD_INIT(AvahiIniFilePair, group->pairs);
84
85            AVAHI_LLIST_PREPEND(AvahiIniFileGroup, groups, f->groups, group);
86            f->n_groups++;
87        } else {
88
89            /* Normal assignment */
90            if (!(e = strchr(s, '='))) {
91                avahi_log_error("Missing assignment in %s:%u: <%s>", fname, line, s);
92                goto fail;
93            }
94
95            if (!group) {
96                avahi_log_error("Assignment outside group in %s:%u <%s>", fname, line, s);
97                goto fail;
98            }
99
100            /* Split the key and the value */
101            *(e++) = 0;
102
103            pair = avahi_new(AvahiIniFilePair, 1);
104            pair->key = avahi_strdup(s);
105            pair->value = avahi_strdup(e);
106
107            AVAHI_LLIST_PREPEND(AvahiIniFilePair, pairs, group->pairs, pair);
108            group->n_pairs++;
109        }
110    }
111
112    fclose(fo);
113
114    return f;
115
116fail:
117
118    if (fo)
119        fclose(fo);
120
121    if (f)
122        avahi_ini_file_free(f);
123
124    return NULL;
125}
126
127void avahi_ini_file_free(AvahiIniFile *f) {
128    AvahiIniFileGroup *g;
129    assert(f);
130
131    while ((g = f->groups)) {
132        AvahiIniFilePair *p;
133
134        while ((p = g->pairs)) {
135            avahi_free(p->key);
136            avahi_free(p->value);
137
138            AVAHI_LLIST_REMOVE(AvahiIniFilePair, pairs, g->pairs, p);
139            avahi_free(p);
140        }
141
142        avahi_free(g->name);
143
144        AVAHI_LLIST_REMOVE(AvahiIniFileGroup, groups, f->groups, g);
145        avahi_free(g);
146    }
147
148    avahi_free(f);
149}
150
151char** avahi_split_csv(const char *t) {
152    unsigned n_comma = 0;
153    const char *p;
154    char **r, **i;
155
156    for (p = t; *p; p++)
157        if (*p == ',')
158            n_comma++;
159
160    i = r = avahi_new(char*, n_comma+2);
161
162    for (;;) {
163        size_t n, l = strcspn(t, ",");
164        const char *c;
165
166        /* Ignore leading blanks */
167        for (c = t, n = l; isblank(*c); c++, n--);
168
169        /* Ignore trailing blanks */
170        for (; n > 0 && isblank(c[n-1]); n--);
171
172        *(i++) = avahi_strndup(c, n);
173
174        t += l;
175
176        if (*t == 0)
177            break;
178
179        assert(*t == ',');
180        t++;
181    }
182
183    *i = NULL;
184
185    return r;
186}
187
188void avahi_strfreev(char **p) {
189    char **i;
190
191    if (!p)
192        return;
193
194    for (i = p; *i; i++)
195        avahi_free(*i);
196
197    avahi_free(p);
198}
199