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initial forking of open-al to create multiple listeners
author Robert McIntyre <rlm@mit.edu>
date Tue, 25 Oct 2011 13:02:31 -0700
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-1:000000000000 0:f9476ff7637e
1 /**
2 * OpenAL cross platform audio library
3 * Copyright (C) 1999-2007 by authors.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 * Or go to http://www.gnu.org/copyleft/lgpl.html
19 */
20
21 #ifdef _WIN32
22 #ifdef __MINGW64__
23 #define _WIN32_IE 0x501
24 #else
25 #define _WIN32_IE 0x400
26 #endif
27 #endif
28
29 #include "config.h"
30
31 #include <stdlib.h>
32 #include <stdio.h>
33 #include <ctype.h>
34 #include <string.h>
35
36 #include "alMain.h"
37
38 #ifdef _WIN32_IE
39 #include <shlobj.h>
40 #endif
41
42 typedef struct ConfigEntry {
43 char *key;
44 char *value;
45 } ConfigEntry;
46
47 typedef struct ConfigBlock {
48 char *name;
49 ConfigEntry *entries;
50 size_t entryCount;
51 } ConfigBlock;
52
53 static ConfigBlock *cfgBlocks;
54 static size_t cfgCount;
55
56 static char buffer[1024];
57
58 static void LoadConfigFromFile(FILE *f)
59 {
60 ConfigBlock *curBlock = cfgBlocks;
61 ConfigEntry *ent;
62
63 while(fgets(buffer, sizeof(buffer), f))
64 {
65 size_t i = 0;
66
67 while(isspace(buffer[i]))
68 i++;
69 if(!buffer[i] || buffer[i] == '#')
70 continue;
71
72 memmove(buffer, buffer+i, strlen(buffer+i)+1);
73
74 if(buffer[0] == '[')
75 {
76 ConfigBlock *nextBlock;
77
78 i = 1;
79 while(buffer[i] && buffer[i] != ']')
80 i++;
81
82 if(!buffer[i])
83 {
84 ERR("config parse error: bad line \"%s\"\n", buffer);
85 continue;
86 }
87 buffer[i] = 0;
88
89 do {
90 i++;
91 if(buffer[i] && !isspace(buffer[i]))
92 {
93 if(buffer[i] != '#')
94 WARN("config warning: extra data after block: \"%s\"\n", buffer+i);
95 break;
96 }
97 } while(buffer[i]);
98
99 nextBlock = NULL;
100 for(i = 0;i < cfgCount;i++)
101 {
102 if(strcasecmp(cfgBlocks[i].name, buffer+1) == 0)
103 {
104 nextBlock = cfgBlocks+i;
105 TRACE("found block '%s'\n", nextBlock->name);
106 break;
107 }
108 }
109
110 if(!nextBlock)
111 {
112 nextBlock = realloc(cfgBlocks, (cfgCount+1)*sizeof(ConfigBlock));
113 if(!nextBlock)
114 {
115 ERR("config parse error: error reallocating config blocks\n");
116 continue;
117 }
118 cfgBlocks = nextBlock;
119 nextBlock = cfgBlocks+cfgCount;
120 cfgCount++;
121
122 nextBlock->name = strdup(buffer+1);
123 nextBlock->entries = NULL;
124 nextBlock->entryCount = 0;
125
126 TRACE("found new block '%s'\n", nextBlock->name);
127 }
128 curBlock = nextBlock;
129 continue;
130 }
131
132 /* Look for the option name */
133 i = 0;
134 while(buffer[i] && buffer[i] != '#' && buffer[i] != '=' &&
135 !isspace(buffer[i]))
136 i++;
137
138 if(!buffer[i] || buffer[i] == '#' || i == 0)
139 {
140 ERR("config parse error: malformed option line: \"%s\"\n", buffer);
141 continue;
142 }
143
144 /* Seperate the option */
145 if(buffer[i] != '=')
146 {
147 buffer[i++] = 0;
148
149 while(isspace(buffer[i]))
150 i++;
151 if(buffer[i] != '=')
152 {
153 ERR("config parse error: option without a value: \"%s\"\n", buffer);
154 continue;
155 }
156 }
157 /* Find the start of the value */
158 buffer[i++] = 0;
159 while(isspace(buffer[i]))
160 i++;
161
162 /* Check if we already have this option set */
163 ent = curBlock->entries;
164 while((size_t)(ent-curBlock->entries) < curBlock->entryCount)
165 {
166 if(strcasecmp(ent->key, buffer) == 0)
167 break;
168 ent++;
169 }
170
171 if((size_t)(ent-curBlock->entries) >= curBlock->entryCount)
172 {
173 /* Allocate a new option entry */
174 ent = realloc(curBlock->entries, (curBlock->entryCount+1)*sizeof(ConfigEntry));
175 if(!ent)
176 {
177 ERR("config parse error: error reallocating config entries\n");
178 continue;
179 }
180 curBlock->entries = ent;
181 ent = curBlock->entries + curBlock->entryCount;
182 curBlock->entryCount++;
183
184 ent->key = strdup(buffer);
185 ent->value = NULL;
186 }
187
188 /* Look for the end of the line (Null term, new-line, or #-symbol) and
189 eat up the trailing whitespace */
190 memmove(buffer, buffer+i, strlen(buffer+i)+1);
191
192 i = 0;
193 while(buffer[i] && buffer[i] != '#' && buffer[i] != '\n')
194 i++;
195 do {
196 i--;
197 } while(isspace(buffer[i]));
198 buffer[++i] = 0;
199
200 free(ent->value);
201 ent->value = strdup(buffer);
202
203 TRACE("found '%s' = '%s'\n", ent->key, ent->value);
204 }
205 }
206
207 void ReadALConfig(void)
208 {
209 const char *str;
210 FILE *f;
211
212 cfgBlocks = calloc(1, sizeof(ConfigBlock));
213 cfgBlocks->name = strdup("general");
214 cfgCount = 1;
215
216 #ifdef _WIN32
217 if(SHGetSpecialFolderPathA(NULL, buffer, CSIDL_APPDATA, FALSE) != FALSE)
218 {
219 size_t p = strlen(buffer);
220 snprintf(buffer+p, sizeof(buffer)-p, "\\alsoft.ini");
221 f = fopen(buffer, "rt");
222 if(f)
223 {
224 LoadConfigFromFile(f);
225 fclose(f);
226 }
227 }
228 #else
229 f = fopen("/etc/openal/alsoft.conf", "r");
230 if(f)
231 {
232 LoadConfigFromFile(f);
233 fclose(f);
234 }
235 if((str=getenv("HOME")) != NULL && *str)
236 {
237 snprintf(buffer, sizeof(buffer), "%s/.alsoftrc", str);
238 f = fopen(buffer, "r");
239 if(f)
240 {
241 LoadConfigFromFile(f);
242 fclose(f);
243 }
244 }
245 #endif
246 if((str=getenv("ALSOFT_CONF")) != NULL && *str)
247 {
248 f = fopen(str, "r");
249 if(f)
250 {
251 LoadConfigFromFile(f);
252 fclose(f);
253 }
254 }
255 }
256
257 void FreeALConfig(void)
258 {
259 size_t i;
260
261 for(i = 0;i < cfgCount;i++)
262 {
263 size_t j;
264 for(j = 0;j < cfgBlocks[i].entryCount;j++)
265 {
266 free(cfgBlocks[i].entries[j].key);
267 free(cfgBlocks[i].entries[j].value);
268 }
269 free(cfgBlocks[i].entries);
270 free(cfgBlocks[i].name);
271 }
272 free(cfgBlocks);
273 cfgBlocks = NULL;
274 cfgCount = 0;
275 }
276
277 const char *GetConfigValue(const char *blockName, const char *keyName, const char *def)
278 {
279 size_t i, j;
280
281 if(!keyName)
282 return def;
283
284 if(!blockName)
285 blockName = "general";
286
287 for(i = 0;i < cfgCount;i++)
288 {
289 if(strcasecmp(cfgBlocks[i].name, blockName) != 0)
290 continue;
291
292 for(j = 0;j < cfgBlocks[i].entryCount;j++)
293 {
294 if(strcasecmp(cfgBlocks[i].entries[j].key, keyName) == 0)
295 {
296 TRACE("Found %s:%s = \"%s\"\n", blockName, keyName,
297 cfgBlocks[i].entries[j].value);
298 if(cfgBlocks[i].entries[j].value[0])
299 return cfgBlocks[i].entries[j].value;
300 return def;
301 }
302 }
303 }
304
305 TRACE("Key %s:%s not found\n", blockName, keyName);
306 return def;
307 }
308
309 int ConfigValueExists(const char *blockName, const char *keyName)
310 {
311 const char *val = GetConfigValue(blockName, keyName, "");
312 return !!val[0];
313 }
314
315 int GetConfigValueInt(const char *blockName, const char *keyName, int def)
316 {
317 const char *val = GetConfigValue(blockName, keyName, "");
318
319 if(!val[0]) return def;
320 return strtol(val, NULL, 0);
321 }
322
323 float GetConfigValueFloat(const char *blockName, const char *keyName, float def)
324 {
325 const char *val = GetConfigValue(blockName, keyName, "");
326
327 if(!val[0]) return def;
328 #ifdef HAVE_STRTOF
329 return strtof(val, NULL);
330 #else
331 return (float)strtod(val, NULL);
332 #endif
333 }
334
335 int GetConfigValueBool(const char *blockName, const char *keyName, int def)
336 {
337 const char *val = GetConfigValue(blockName, keyName, "");
338
339 if(!val[0]) return !!def;
340 return (strcasecmp(val, "true") == 0 || strcasecmp(val, "yes") == 0 ||
341 strcasecmp(val, "on") == 0 || atoi(val) != 0);
342 }