2 * This file is part of DisOrder.
3 * Copyright (C) 2004-2008 Richard Kettlewell
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 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /** @file cgi/options.c
21 * Options represent an additional configuration system private to the
25 #include "disorder-cgi.h"
32 struct read_options_state {
40 static void option__readfile(const char *name);
42 static void option__label(int attribute((unused)) nvec,
44 option_set(vec[0], vec[1]);
47 static void option__include(int attribute((unused)) nvec,
49 option__readfile(vec[0]);
52 static void option__columns(int nvec,
56 c.ncolumns = nvec - 1;
58 hash_add(columns, vec[0], &c, HASH_INSERT_OR_REPLACE);
61 static struct option {
64 void (*handler)(int nvec, char **vec);
66 { "columns", 1, INT_MAX, option__columns },
67 { "include", 1, 1, option__include },
68 { "label", 2, 2, option__label },
71 static void option__split_error(const char *msg,
73 struct read_options_state *cs = u;
75 disorder_error(0, "%s:%d: %s", cs->name, cs->line, msg);
78 static void option__readfile(const char *name) {
82 struct read_options_state cs;
84 if(!(cs.name = mx_find(name, 1/*report*/)))
86 if(!(fp = fopen(cs.name, "r")))
87 disorder_fatal(errno, "error opening %s", cs.name);
89 while(!inputline(cs.name, fp, &buffer, '\n')) {
91 if(!(vec = split(buffer, &n, SPLIT_COMMENTS|SPLIT_QUOTES,
92 option__split_error, &cs)))
96 if((i = TABLE_FIND(options, name, vec[0])) == -1) {
97 disorder_error(0, "%s:%d: unknown option '%s'", cs.name, cs.line, vec[0]);
102 if(n < options[i].minargs) {
103 disorder_error(0, "%s:%d: too few arguments to '%s'", cs.name, cs.line, vec[-1]);
106 if(n > options[i].maxargs) {
107 disorder_error(0, "%s:%d: too many arguments to '%s'", cs.name, cs.line, vec[-1]);
110 options[i].handler(n, vec);
115 static void option__init(void) {
116 static int have_read_options;
118 if(!have_read_options) {
119 have_read_options = 1;
120 labels = hash_new(sizeof (char *));
121 columns = hash_new(sizeof (struct column));
122 option__readfile("options");
126 /** @brief Set an option
127 * @param name Option name
128 * @param value Option value
130 * If the option was already set its value is replaced.
132 * @p name and @p value are copied.
134 void option_set(const char *name, const char *value) {
135 char *v = xstrdup(value);
138 hash_add(labels, name, &v, HASH_INSERT_OR_REPLACE);
141 /** @brief Get a label
142 * @param key Name of label
143 * @return Value of label (never NULL)
145 * If label images.X isn't found then the return value is
146 * <url.static>X.png, allowing url.static to be used to provide a base
147 * for all images with per-image overrides.
149 * Otherwise undefined labels expand to their last (dot-separated)
152 const char *option_label(const char *key) {
157 lptr = hash_find(labels, key);
161 if(!strncmp(key, "images.", 7)) {
162 static const char *url_static;
163 /* images.X defaults to <url.static>X.png */
166 url_static = option_label("url.static");
167 byte_xasprintf((char **)&label, "%s%s.png", url_static, key + 7);
168 } else if((label = strrchr(key, '.')))
169 /* X.Y defaults to Y */
172 /* otherwise default to label name */
177 /** @brief Test whether a label exists
178 * @param key Name of label
179 * @return 1 if label exists, otherwise 0
181 * Labels that don't exist still have an expansion (per option_label()
182 * documentation), and possibly not even a placeholder one.
184 int option_label_exists(const char *key) {
186 return !!hash_find(labels, key);
189 /** @brief Return a column list
190 * @param name Context (playing/recent/etc)
191 * @param ncolumns Where to store column count or NULL
192 * @return Pointer to column list
194 char **option_columns(const char *name, int *ncolumns) {
198 c = hash_find(columns, name);
201 *ncolumns = c->ncolumns;