2 * config.c -- configuration functions for Browser Switchboard
4 * Copyright (C) 2009-2010 Steven Luo
5 * Derived from a Python implementation by Jason Simpson and Steven Luo
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
27 #include "configfile.h"
30 /* The Browser Switchboard config file options */
31 struct swb_config_option swb_config_options[] = {
32 { "continuous_mode", SWB_CONFIG_OPT_INT, SWB_CONFIG_CONTINUOUS_MODE_SET },
33 { "default_browser", SWB_CONFIG_OPT_STRING, SWB_CONFIG_DEFAULT_BROWSER_SET },
34 { "other_browser_cmd", SWB_CONFIG_OPT_STRING, SWB_CONFIG_OTHER_BROWSER_CMD_SET },
35 { "logging", SWB_CONFIG_OPT_STRING, SWB_CONFIG_LOGGING_SET },
39 /* Browser Switchboard configuration defaults */
40 static struct swb_config swb_config_defaults = {
41 .flags = SWB_CONFIG_INITIALIZED,
43 .default_browser = "microb",
44 .other_browser_cmd = NULL,
49 /* Copy the contents of an swb_config struct
50 The entries[] array means that the standard copy will not work */
51 void swb_config_copy(struct swb_config *dst, struct swb_config *src) {
55 dst->entries[0] = &(dst->continuous_mode);
56 dst->entries[1] = &(dst->default_browser);
57 dst->entries[2] = &(dst->other_browser_cmd);
58 dst->entries[3] = &(dst->logging);
60 dst->flags = src->flags;
62 dst->continuous_mode = src->continuous_mode;
63 dst->default_browser = src->default_browser;
64 dst->other_browser_cmd = src->other_browser_cmd;
65 dst->logging = src->logging;
68 /* Initialize a swb_config struct with configuration defaults */
69 void swb_config_init(struct swb_config *cfg) {
70 swb_config_copy(cfg, &swb_config_defaults);
73 /* Free all heap memory used in an swb_config struct
74 This MUST NOT be done if any of the strings are being used elsewhere! */
75 void swb_config_free(struct swb_config *cfg) {
80 if (!(cfg->flags & SWB_CONFIG_INITIALIZED))
83 for (i = 0; swb_config_options[i].name; ++i) {
84 if (cfg->flags & swb_config_options[i].set_mask) {
85 switch (swb_config_options[i].type) {
86 case SWB_CONFIG_OPT_STRING:
87 free(*(char **)cfg->entries[i]);
88 *(char **)cfg->entries[i] = NULL;
99 /* Load a value into the part of a struct swb_config indicated by name */
100 static int swb_config_load_option(struct swb_config *cfg,
101 char *name, char *value) {
102 struct swb_config_option *opt;
105 /* Search through list of recognized config options for a match */
106 for (opt = swb_config_options; opt->name; ++opt) {
107 if (strcmp(name, opt->name))
110 if (!(cfg->flags & opt->set_mask)) {
111 i = opt - swb_config_options;
113 case SWB_CONFIG_OPT_STRING:
114 *(char **)cfg->entries[i] = value;
116 case SWB_CONFIG_OPT_INT:
117 *(int *)cfg->entries[i] = atoi(value);
121 cfg->flags |= opt->set_mask;
123 /* Option was repeated in the config file
124 We want the first value, so ignore this one */
130 /* Unrecognized config option */
135 /* Read the config file and load settings into the provided swb_config struct
136 Caller is responsible for freeing allocated strings with free()
137 Returns true on success, false otherwise */
138 int swb_config_load(struct swb_config *cfg) {
140 struct swb_config_line line;
142 if (!cfg || !(cfg->flags & SWB_CONFIG_INITIALIZED))
145 if (!(fp = open_config_file()))
148 /* Parse the config file
149 TODO: should we handle errors differently than EOF? */
150 if (!parse_config_file_begin())
152 while (!parse_config_file_line(fp, &line)) {
154 swb_config_load_option(cfg, line.key, line.value);
157 parse_config_file_end();