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1 | /* |
2 | * This file is part of DisOrder. | |
3 | * Copyright (C) 2004-2008 Richard Kettlewell | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
20 | /** @file server/options.c | |
21 | * @brief CGI options | |
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22 | * |
23 | * Options represent an additional configuration system private to the | |
24 | * CGI program. | |
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25 | */ |
26 | ||
1e97629d | 27 | #include "disorder-cgi.h" |
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28 | |
29 | struct column { | |
30 | int ncolumns; | |
31 | char **columns; | |
32 | }; | |
33 | ||
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34 | struct read_options_state { |
35 | const char *name; | |
36 | int line; | |
37 | }; | |
38 | ||
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39 | static hash *labels; |
40 | static hash *columns; | |
41 | ||
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42 | static void option__readfile(const char *name); |
43 | ||
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44 | static void option__label(int attribute((unused)) nvec, |
45 | char **vec) { | |
46 | option_set(vec[0], vec[1]); | |
47 | } | |
48 | ||
49 | static void option__include(int attribute((unused)) nvec, | |
50 | char **vec) { | |
51 | option__readfile(vec[0]); | |
52 | } | |
53 | ||
54 | static void option__columns(int nvec, | |
55 | char **vec) { | |
56 | struct column c; | |
57 | ||
58 | c.ncolumns = nvec - 1; | |
59 | c.columns = &vec[1]; | |
60 | hash_add(columns, vec[0], &c, HASH_INSERT_OR_REPLACE); | |
61 | } | |
62 | ||
63 | static struct option { | |
64 | const char *name; | |
65 | int minargs, maxargs; | |
66 | void (*handler)(int nvec, char **vec); | |
67 | } options[] = { | |
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68 | { "columns", 1, INT_MAX, option__columns }, |
69 | { "include", 1, 1, option__include }, | |
70 | { "label", 2, 2, option__label }, | |
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71 | }; |
72 | ||
73 | static void option__split_error(const char *msg, | |
74 | void *u) { | |
75 | struct read_options_state *cs = u; | |
76 | ||
77 | error(0, "%s:%d: %s", cs->name, cs->line, msg); | |
78 | } | |
79 | ||
80 | static void option__readfile(const char *name) { | |
81 | int n, i; | |
9faa7a88 RK |
82 | FILE *fp; |
83 | char **vec, *buffer; | |
84 | struct read_options_state cs; | |
9faa7a88 | 85 | |
f2d306b4 | 86 | if(!(cs.name = mx_find(name, 1/*report*/))) |
9faa7a88 RK |
87 | return; |
88 | if(!(fp = fopen(cs.name, "r"))) | |
89 | fatal(errno, "error opening %s", cs.name); | |
90 | cs.line = 0; | |
91 | while(!inputline(cs.name, fp, &buffer, '\n')) { | |
92 | ++cs.line; | |
93 | if(!(vec = split(buffer, &n, SPLIT_COMMENTS|SPLIT_QUOTES, | |
94 | option__split_error, &cs))) | |
95 | continue; | |
96 | if(!n) | |
97 | continue; | |
ba937f01 | 98 | if((i = TABLE_FIND(options, name, vec[0])) == -1) { |
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99 | error(0, "%s:%d: unknown option '%s'", cs.name, cs.line, vec[0]); |
100 | continue; | |
101 | } | |
102 | ++vec; | |
103 | --n; | |
104 | if(n < options[i].minargs) { | |
105 | error(0, "%s:%d: too few arguments to '%s'", cs.name, cs.line, vec[-1]); | |
106 | continue; | |
107 | } | |
108 | if(n > options[i].maxargs) { | |
109 | error(0, "%s:%d: too many arguments to '%s'", cs.name, cs.line, vec[-1]); | |
110 | continue; | |
111 | } | |
112 | options[i].handler(n, vec); | |
113 | } | |
114 | fclose(fp); | |
115 | } | |
116 | ||
117 | static void option__init(void) { | |
118 | static int have_read_options; | |
119 | ||
120 | if(!have_read_options) { | |
121 | have_read_options = 1; | |
122 | labels = hash_new(sizeof (char *)); | |
123 | columns = hash_new(sizeof (struct column)); | |
124 | option__readfile("options"); | |
125 | } | |
126 | } | |
127 | ||
128 | /** @brief Set an option | |
129 | * @param name Option name | |
130 | * @param value Option value | |
131 | * | |
132 | * If the option was already set its value is replaced. | |
133 | * | |
134 | * @p name and @p value are copied. | |
135 | */ | |
136 | void option_set(const char *name, const char *value) { | |
137 | char *v = xstrdup(value); | |
138 | ||
139 | option__init(); | |
140 | hash_add(labels, name, &v, HASH_INSERT_OR_REPLACE); | |
141 | } | |
142 | ||
143 | /** @brief Get a label | |
144 | * @param key Name of label | |
145 | * @return Value of label (never NULL) | |
146 | * | |
147 | * If label images.X isn't found then the return value is | |
148 | * <url.static>X.png, allowing url.static to be used to provide a base | |
149 | * for all images with per-image overrides. | |
150 | * | |
151 | * Otherwise undefined labels expand to their last (dot-separated) | |
152 | * component. | |
153 | */ | |
154 | const char *option_label(const char *key) { | |
155 | const char *label; | |
99955407 | 156 | char **lptr; |
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157 | |
158 | option__init(); | |
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159 | lptr = hash_find(labels, key); |
160 | if(lptr) | |
161 | return *lptr; | |
162 | /* No label found */ | |
163 | if(!strncmp(key, "images.", 7)) { | |
164 | static const char *url_static; | |
165 | /* images.X defaults to <url.static>X.png */ | |
166 | ||
167 | if(!url_static) | |
168 | url_static = option_label("url.static"); | |
169 | byte_xasprintf((char **)&label, "%s%s.png", url_static, key + 7); | |
170 | } else if((label = strrchr(key, '.'))) | |
171 | /* X.Y defaults to Y */ | |
172 | ++label; | |
173 | else | |
174 | /* otherwise default to label name */ | |
175 | label = key; | |
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176 | return label; |
177 | } | |
178 | ||
179 | /** @brief Test whether a label exists | |
180 | * @param key Name of label | |
181 | * @return 1 if label exists, otherwise 0 | |
182 | * | |
183 | * Labels that don't exist still have an expansion (per option_label() | |
184 | * documentation), and possibly not even a placeholder one. | |
185 | */ | |
186 | int option_label_exists(const char *key) { | |
187 | option__init(); | |
188 | return !!hash_find(labels, key); | |
189 | } | |
190 | ||
191 | /** @brief Return a column list | |
192 | * @param name Context (playing/recent/etc) | |
193 | * @param ncolumns Where to store column count or NULL | |
194 | * @return Pointer to column list | |
195 | */ | |
196 | char **option_columns(const char *name, int *ncolumns) { | |
197 | struct column *c; | |
198 | ||
199 | option__init(); | |
200 | c = hash_find(columns, name); | |
201 | if(c) { | |
202 | if(ncolumns) | |
203 | *ncolumns = c->ncolumns; | |
204 | return c->columns; | |
205 | } else { | |
206 | if(ncolumns) | |
207 | *ncolumns = 0; | |
208 | return 0; | |
209 | } | |
210 | } | |
211 | ||
212 | /* | |
213 | Local Variables: | |
214 | c-basic-offset:2 | |
215 | comment-column:40 | |
216 | End: | |
217 | */ |