aboutsummaryrefslogtreecommitdiff
path: root/common/config-manager.cpp
blob: add32cd00e07495699eff313d7dd3c75967a55b4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2005 The ScummVM project
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header$
 *
 */

#include "stdafx.h"

#include "common/config-manager.h"
#include "common/file.h"
#include "common/util.h"

DECLARE_SINGLETON(Common::ConfigManager);

#if defined(UNIX)
#ifdef MACOSX
#define DEFAULT_CONFIG_FILE "Library/Preferences/ScummVM Preferences"
#else
#define DEFAULT_CONFIG_FILE ".scummvmrc"
#endif
#else
#define DEFAULT_CONFIG_FILE "scummvm.ini"
#endif

#define MAXLINELEN 256

static char *ltrim(char *t) {
	while (isspace(*t))
		t++;
	return t;
}

static char *rtrim(char *t) {
	int l = strlen(t) - 1;
	while (l >= 0 && isspace(t[l]))
		t[l--] = 0;
	return t;
}

static bool isValidDomainName(const Common::String &domain) {
	const char *p = domain.c_str();
	while (*p && (isalnum(*p) || *p == '-' || *p == '_'))
		p++;
	return *p == 0;
}

namespace Common {

const String ConfigManager::kApplicationDomain("scummvm");
const String ConfigManager::kTransientDomain("__TRANSIENT");

const String trueStr("true");
const String falseStr("false");


#pragma mark -


ConfigManager::ConfigManager() {
	// Ensure the global domain(s) are setup.
	_globalDomains.addKey(kApplicationDomain);
}


void ConfigManager::loadDefaultConfigFile() {
	char configFile[MAXPATHLEN];
#if defined(UNIX)
	if(getenv("HOME") != NULL)
		sprintf(configFile,"%s/%s", getenv("HOME"), DEFAULT_CONFIG_FILE);
	else
		strcpy(configFile, DEFAULT_CONFIG_FILE);
#else
	#if defined (WIN32) && !defined(_WIN32_WCE)
		GetWindowsDirectory(configFile, MAXPATHLEN);
		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);
	#elif defined(__PALM_OS__)
		strcpy(configFile,"/PALM/Programs/ScummVM/" DEFAULT_CONFIG_FILE);
	#elif defined(__PLAYSTATION2__)
		strcpy(configFile, "mc0:ScummVM/" DEFAULT_CONFIG_FILE);
	#else
		strcpy(configFile, DEFAULT_CONFIG_FILE);
	#endif
#endif

	loadConfigFile(configFile);
}

void ConfigManager::loadConfigFile(const String &filename) {
	_globalDomains.clear();
	_gameDomains.clear();
	_transientDomain.clear();

	// Ensure the global domain(s) are setup.
	_globalDomains.addKey(kApplicationDomain);

	_filename = filename;
	_domainSaveOrder.clear();
	loadFile(_filename);
	debug(1, "Switched to configuration %s", _filename.c_str());
}

void ConfigManager::loadFile(const String &filename) {
	File cfg_file;

	if (!cfg_file.open(filename.c_str())) {
		warning("Unable to open configuration file: %s", filename.c_str());
	} else {
		char buf[MAXLINELEN];
		String domain;
		String comment;
		int lineno = 0;
		
		// TODO: Detect if a domain occurs multiple times (or likewise, if
		// a key occurs multiple times inside one domain).

		while (!cfg_file.eof()) {
			lineno++;
			if (!cfg_file.readLine(buf, MAXLINELEN))
				break;

			if (buf[0] == '#') {
				// Accumulate comments here. Once we encounter either the start
				// of a new domain, or a key-value-pair, we associate the value
				// of the 'comment' variable with that entity.
				comment += buf;
				comment += '\n';
			} else if (buf[0] == '[') {
				// It's a new domain which begins here.
				char *p = buf + 1;
				// Get the domain name, and check whether it's valid (that
				// is, verify that it only consists of alphanumerics,
				// dashes and underscores).
				while (*p && (isalnum(*p) || *p == '-' || *p == '_'))
					p++;

				switch (*p) {
				case '\0':
					error("Config file buggy: missing ] in line %d", lineno);
					break;
				case ']':
					*p = 0;
					domain = buf + 1;
					break;
				default:
					error("Config file buggy: Invalid character '%c' occured in domain name in line %d", *p, lineno);
				}
				
				// Store domain comment
				if (_globalDomains.contains(domain)) {
					_globalDomains[domain].setDomainComment(comment);
				} else {
					_gameDomains[domain].setDomainComment(comment);
				}
				comment.clear();
				
				_domainSaveOrder.push_back(domain);
			} else {
				// Skip leading & trailing whitespaces
				char *t = rtrim(ltrim(buf));

				// Skip empty lines
				if (*t == 0)
					continue;

				// If no domain has been set, this config file is invalid!
				if (domain.isEmpty()) {
					error("Config file buggy: Key/value pair found outside a domain in line %d", lineno);
				}

				// Split string at '=' into 'key' and 'value'.
				char *p = strchr(t, '=');
				if (!p)
					error("Config file buggy: Junk found in line line %d: '%s'", lineno, t);
				*p = 0;
				String key = rtrim(t);
				String value = ltrim(p + 1);
				set(key, value, domain);

				// Store comment
				if (_globalDomains.contains(domain)) {
					_globalDomains[domain].setKVComment(key, comment);
				} else {
					_gameDomains[domain].setKVComment(key, comment);
				}
				comment.clear();
			}
		}
	}
}

void ConfigManager::flushToDisk() {
	FILE *cfg_file;

// TODO
//	if (!willwrite)
//		return;

	if (!(cfg_file = fopen(_filename.c_str(), "w"))) {
		warning("Unable to write configuration file: %s", _filename.c_str());
	} else {
		
		// First write the domains in _domainSaveOrder, in that order.
		// Note: It's possible for _domainSaveOrder to list domains which
		// are not present anymore.
		StringList::const_iterator i;
		for (i = _domainSaveOrder.begin(); i != _domainSaveOrder.end(); ++i) {
			if (_globalDomains.contains(*i)) {
				writeDomain(cfg_file, *i, _globalDomains[*i]);
			} else if (_gameDomains.contains(*i)) {
				writeDomain(cfg_file, *i, _gameDomains[*i]);
			}
		}

		DomainMap::const_iterator d;

		// Now write the global domains which weren't written yet
		for (d = _globalDomains.begin(); d != _globalDomains.end(); ++d) {
			if (!_domainSaveOrder.contains(d->_key))
				writeDomain(cfg_file, d->_key, d->_value);
		}
		
		// Finally write the remaining game domains
		for (d = _gameDomains.begin(); d != _gameDomains.end(); ++d) {
			if (!_domainSaveOrder.contains(d->_key))
				writeDomain(cfg_file, d->_key, d->_value);
		}

		fclose(cfg_file);
	}
}

void ConfigManager::writeDomain(FILE *file, const String &name, const Domain &domain) {
	if (domain.isEmpty())
		return;		// Don't bother writing empty domains.
	
	String comment;
	
	// Write domain comment (if any)
	comment = domain.getDomainComment();
	if (!comment.isEmpty())
		fprintf(file, "%s", comment.c_str());
	
	// Write domain start
	fprintf(file, "[%s]\n", name.c_str());

	// Write all key/value pairs in this domain, including comments
	Domain::const_iterator x;
	for (x = domain.begin(); x != domain.end(); ++x) {
		const String &value = x->_value;
		if (!value.isEmpty()) {
			// Write comment (if any)
			if (domain.hasKVComment(x->_key)) {
				comment = domain.getKVComment(x->_key);
				fprintf(file, "%s", comment.c_str());
			}
			// Write the key/value pair
			fprintf(file, "%s=%s\n", x->_key.c_str(), value.c_str());
		}
	}
	fprintf(file, "\n");
}

#pragma mark -


bool ConfigManager::hasKey(const String &key) const {
	// Search the domains in the following order:
	// 1) Transient domain
	// 2) Active game domain (if any)
	// 3) All global domains
	// The defaults domain is explicitly *not* checked.
	
	if (_transientDomain.contains(key))
		return true;

	if (!_activeDomain.isEmpty() && _gameDomains[_activeDomain].contains(key))
		return true;
	
	DomainMap::const_iterator iter;
	for (iter = _globalDomains.begin(); iter != _globalDomains.end(); ++iter) {
		if (iter->_value.contains(key))
			return true;
	}

	return false;
}

bool ConfigManager::hasKey(const String &key, const String &dom) const {
	assert(!dom.isEmpty());
	assert(isValidDomainName(dom));

	if (dom == kTransientDomain)
		return _transientDomain.contains(key);
	if (_gameDomains.contains(dom))
		return _gameDomains[dom].contains(key);
	if (_globalDomains.contains(dom))
		return _globalDomains[dom].contains(key);
	
	return false;
}

void ConfigManager::removeKey(const String &key, const String &dom) {
	assert(!dom.isEmpty());
	assert(isValidDomainName(dom));

	if (dom == kTransientDomain)
		_transientDomain.remove(key);
	else if (_gameDomains.contains(dom))
		_gameDomains[dom].remove(key);
	else if (_globalDomains.contains(dom))
		_globalDomains[dom].remove(key);
	else
		error("Removing key '%s' from non-existent domain '%s'", key.c_str(), dom.c_str());
}


#pragma mark -


const String & ConfigManager::get(const String &key, const String &domain) const {
	assert(isValidDomainName(domain));

	// Search the domains in the following order:
	// 1) Transient domain
	// 2) Active game domain (if any)
	// 3) All global domains
	// 4) The defaults 


	if ((domain.isEmpty() || domain == kTransientDomain) && _transientDomain.contains(key))
		return _transientDomain[key];

	const String &dom = domain.isEmpty() ? _activeDomain : domain;

	if (!dom.isEmpty() && _gameDomains.contains(dom) && _gameDomains[dom].contains(key))
		return _gameDomains[dom][key];

	DomainMap::const_iterator iter;
	for (iter = _globalDomains.begin(); iter != _globalDomains.end(); ++iter) {
		if (iter->_value.contains(key))
			return iter->_value[key];
	}

	return _defaultsDomain.get(key);
}

int ConfigManager::getInt(const String &key, const String &dom) const {
	String value(get(key, dom));
	char *errpos;
	
	// For now, be tolerant against missing config keys. Strictly spoken, it is
	// a bug in the calling code to retrieve an int for a key which isn't even
	// present... and a default value of 0 seems rather arbitrary.
	if (value.isEmpty())
		return 0;

	int ivalue = (int)strtol(value.c_str(), &errpos, 10);
	if (value.c_str() == errpos)
		error("Config file buggy: '%s' is not a valid integer", errpos);

	return ivalue;
}

bool ConfigManager::getBool(const String &key, const String &dom) const {
	String value(get(key, dom));

	if ((value == trueStr) || (value == "yes") || (value == "1"))
		return true;
	if ((value == falseStr) || (value == "no") || (value == "0"))
		return false;

	error("Config file buggy: '%s' is not a valid bool", value.c_str());
}


#pragma mark -


void ConfigManager::set(const String &key, const String &value, const String &dom) {
	assert(isValidDomainName(dom));
	if (dom.isEmpty()) {
		// Remove the transient domain value
		_transientDomain.remove(key);
	
		if (_activeDomain.isEmpty())
			_globalDomains[kApplicationDomain][key] = value;
		else
			_gameDomains[_activeDomain][key] = value;

	} else {

		if (dom == kTransientDomain)
			_transientDomain[key] = value;
		else {
			if (_globalDomains.contains(dom)) {
				_globalDomains[dom][key] = value;
				if (_activeDomain.isEmpty() || !_gameDomains[_activeDomain].contains(key))
					_transientDomain.remove(key);
			} else {
				_gameDomains[dom][key] = value;
				if (dom == _activeDomain)
					_transientDomain.remove(key);
			}
		}
	}
}

void ConfigManager::set(const String &key, const char *value, const String &dom) {
	set(key, String(value), dom);
}

void ConfigManager::set(const String &key, int value, const String &dom) {
	char tmp[128];
	snprintf(tmp, sizeof(tmp), "%i", value);
	set(key, String(tmp), dom);
}

void ConfigManager::set(const String &key, bool value, const String &dom) {
	set(key, value ? trueStr : falseStr, dom);
}


#pragma mark -


void ConfigManager::registerDefault(const String &key, const String &value) {
	_defaultsDomain[key] = value;
}

void ConfigManager::registerDefault(const String &key, const char *value) {
	registerDefault(key, String(value));
}

void ConfigManager::registerDefault(const String &key, int value) {
	char tmp[128];
	snprintf(tmp, sizeof(tmp), "%i", value);
	registerDefault(key, tmp);
}

void ConfigManager::registerDefault(const String &key, bool value) {
	registerDefault(key, value ? trueStr : falseStr);
}


#pragma mark -


void ConfigManager::setActiveDomain(const String &domain) {
	assert(!domain.isEmpty());
	assert(isValidDomainName(domain));
	_activeDomain = domain;
	_gameDomains.addKey(domain);
}

void ConfigManager::removeGameDomain(const String &domain) {
	assert(!domain.isEmpty());
	assert(isValidDomainName(domain));
	_gameDomains.remove(domain);
}

void ConfigManager::renameGameDomain(const String &oldName, const String &newName) {
	if (oldName == newName)
		return;

	assert(!oldName.isEmpty());
	assert(!newName.isEmpty());
	assert(isValidDomainName(oldName));
	assert(isValidDomainName(newName));

	_gameDomains[newName].merge(_gameDomains[oldName]);
	
	_gameDomains.remove(oldName);
}

bool ConfigManager::hasGameDomain(const String &domain) const {
	assert(!domain.isEmpty());
	return isValidDomainName(domain) && _gameDomains.contains(domain);
}


#pragma mark -


const String &ConfigManager::Domain::get(const String &key) const {
	Node *node = findNode(_root, key);
	return node ? node->_value : String::emptyString;
}

void ConfigManager::Domain::setDomainComment(const String &comment) {
	_domainComment = comment;
}
const String &ConfigManager::Domain::getDomainComment() const {
	return _domainComment;
}

void ConfigManager::Domain::setKVComment(const String &key, const String &comment) {
	_keyValueComments[key] = comment;
}
const String &ConfigManager::Domain::getKVComment(const String &key) const {
	return _keyValueComments[key];
}
bool ConfigManager::Domain::hasKVComment(const String &key) const {
	return _keyValueComments.contains(key);
}

}	// End of namespace Common