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| 1 /* |
| 2 * Copyright 2013 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #include "SkRTConf.h" |
| 9 #include "SkOSFile.h" |
| 10 |
| 11 #include <stdlib.h> |
| 12 |
| 13 SkRTConfRegistry::SkRTConfRegistry(): fConfs(100) { |
| 14 |
| 15 FILE *fp = sk_fopen(configFileLocation(), kRead_SkFILE_Flag); |
| 16 |
| 17 if (!fp) { |
| 18 return; |
| 19 } |
| 20 |
| 21 char line[1024]; |
| 22 |
| 23 while (!sk_feof(fp)) { |
| 24 |
| 25 if (!sk_fgets(line, sizeof(line), fp)) { |
| 26 break; |
| 27 } |
| 28 |
| 29 char *commentptr = strchr(line, '#'); |
| 30 if (commentptr == line) { |
| 31 continue; |
| 32 } |
| 33 if (commentptr) { |
| 34 *commentptr = '\0'; |
| 35 } |
| 36 |
| 37 char sep[] = " \t\r\n"; |
| 38 |
| 39 char *keyptr = strtok(line, sep); |
| 40 if (!keyptr) { |
| 41 continue; |
| 42 } |
| 43 |
| 44 char *valptr = strtok(nullptr, sep); |
| 45 if (!valptr) { |
| 46 continue; |
| 47 } |
| 48 |
| 49 SkString *key = new SkString(keyptr); |
| 50 SkString *val = new SkString(valptr); |
| 51 |
| 52 fConfigFileKeys.append(1, &key); |
| 53 fConfigFileValues.append(1, &val); |
| 54 } |
| 55 sk_fclose(fp); |
| 56 } |
| 57 |
| 58 SkRTConfRegistry::~SkRTConfRegistry() { |
| 59 ConfMap::Iter iter(fConfs); |
| 60 SkTDArray<SkRTConfBase *> *confArray; |
| 61 |
| 62 while (iter.next(&confArray)) { |
| 63 delete confArray; |
| 64 } |
| 65 |
| 66 for (int i = 0 ; i < fConfigFileKeys.count() ; i++) { |
| 67 delete fConfigFileKeys[i]; |
| 68 delete fConfigFileValues[i]; |
| 69 } |
| 70 } |
| 71 |
| 72 const char *SkRTConfRegistry::configFileLocation() const { |
| 73 return "skia.conf"; // for now -- should probably do something fancier like
home directories or whatever. |
| 74 } |
| 75 |
| 76 // dump all known runtime config options to the file with their default values. |
| 77 // to trigger this, make a config file of zero size. |
| 78 void SkRTConfRegistry::possiblyDumpFile() const { |
| 79 const char *path = configFileLocation(); |
| 80 FILE *fp = sk_fopen(path, kRead_SkFILE_Flag); |
| 81 if (!fp) { |
| 82 return; |
| 83 } |
| 84 size_t configFileSize = sk_fgetsize(fp); |
| 85 if (configFileSize == 0) { |
| 86 printAll(path); |
| 87 } |
| 88 sk_fclose(fp); |
| 89 } |
| 90 |
| 91 // Run through every provided configuration option and print a warning if the us
er hasn't |
| 92 // declared a correponding configuration object somewhere. |
| 93 void SkRTConfRegistry::validate() const { |
| 94 for (int i = 0 ; i < fConfigFileKeys.count() ; i++) { |
| 95 if (!fConfs.find(fConfigFileKeys[i]->c_str())) { |
| 96 SkDebugf("WARNING: You have config value %s in your configuration fi
le, but I've never heard of that.\n", fConfigFileKeys[i]->c_str()); |
| 97 } |
| 98 } |
| 99 } |
| 100 |
| 101 void SkRTConfRegistry::printAll(const char *fname) const { |
| 102 SkWStream *o; |
| 103 |
| 104 if (fname) { |
| 105 o = new SkFILEWStream(fname); |
| 106 } else { |
| 107 o = new SkDebugWStream(); |
| 108 } |
| 109 |
| 110 ConfMap::Iter iter(fConfs); |
| 111 SkTDArray<SkRTConfBase *> *confArray; |
| 112 |
| 113 while (iter.next(&confArray)) { |
| 114 if (confArray->getAt(0)->isDefault()) { |
| 115 o->writeText("# "); |
| 116 } |
| 117 confArray->getAt(0)->print(o); |
| 118 o->newline(); |
| 119 } |
| 120 |
| 121 delete o; |
| 122 } |
| 123 |
| 124 bool SkRTConfRegistry::hasNonDefault() const { |
| 125 ConfMap::Iter iter(fConfs); |
| 126 SkTDArray<SkRTConfBase *> *confArray; |
| 127 while (iter.next(&confArray)) { |
| 128 if (!confArray->getAt(0)->isDefault()) { |
| 129 return true; |
| 130 } |
| 131 } |
| 132 return false; |
| 133 } |
| 134 |
| 135 void SkRTConfRegistry::printNonDefault(const char *fname) const { |
| 136 SkWStream *o; |
| 137 |
| 138 if (fname) { |
| 139 o = new SkFILEWStream(fname); |
| 140 } else { |
| 141 o = new SkDebugWStream(); |
| 142 } |
| 143 ConfMap::Iter iter(fConfs); |
| 144 SkTDArray<SkRTConfBase *> *confArray; |
| 145 |
| 146 while (iter.next(&confArray)) { |
| 147 if (!confArray->getAt(0)->isDefault()) { |
| 148 confArray->getAt(0)->print(o); |
| 149 o->newline(); |
| 150 } |
| 151 } |
| 152 |
| 153 delete o; |
| 154 } |
| 155 |
| 156 // register a configuration variable after its value has been set by the parser. |
| 157 // we maintain a vector of these things instead of just a single one because the |
| 158 // user might set the value after initialization time and we need to have |
| 159 // all the pointers lying around, not just one. |
| 160 void SkRTConfRegistry::registerConf(SkRTConfBase *conf) { |
| 161 SkTDArray<SkRTConfBase *> *confArray; |
| 162 if (fConfs.find(conf->getName(), &confArray)) { |
| 163 if (!conf->equals(confArray->getAt(0))) { |
| 164 SkDebugf("WARNING: Skia config \"%s\" was registered more than once
in incompatible ways.\n", conf->getName()); |
| 165 } else { |
| 166 confArray->append(1, &conf); |
| 167 } |
| 168 } else { |
| 169 confArray = new SkTDArray<SkRTConfBase *>; |
| 170 confArray->append(1, &conf); |
| 171 fConfs.set(conf->getName(),confArray); |
| 172 } |
| 173 } |
| 174 |
| 175 template <typename T> T doParse(const char *, bool *success ) { |
| 176 SkDebugf("WARNING: Invoked non-specialized doParse function...\n"); |
| 177 if (success) { |
| 178 *success = false; |
| 179 } |
| 180 return (T) 0; |
| 181 } |
| 182 |
| 183 template<> bool doParse<bool>(const char *s, bool *success) { |
| 184 if (success) { |
| 185 *success = true; |
| 186 } |
| 187 if (!strcmp(s,"1") || !strcmp(s,"true")) { |
| 188 return true; |
| 189 } |
| 190 if (!strcmp(s,"0") || !strcmp(s,"false")) { |
| 191 return false; |
| 192 } |
| 193 if (success) { |
| 194 *success = false; |
| 195 } |
| 196 return false; |
| 197 } |
| 198 |
| 199 template<> const char * doParse<const char *>(const char * s, bool *success) { |
| 200 if (success) { |
| 201 *success = true; |
| 202 } |
| 203 return s; |
| 204 } |
| 205 |
| 206 template<> int doParse<int>(const char * s, bool *success) { |
| 207 if (success) { |
| 208 *success = true; |
| 209 } |
| 210 return atoi(s); |
| 211 } |
| 212 |
| 213 template<> unsigned int doParse<unsigned int>(const char * s, bool *success) { |
| 214 if (success) { |
| 215 *success = true; |
| 216 } |
| 217 return (unsigned int) atoi(s); |
| 218 } |
| 219 |
| 220 template<> float doParse<float>(const char * s, bool *success) { |
| 221 if (success) { |
| 222 *success = true; |
| 223 } |
| 224 return (float) atof(s); |
| 225 } |
| 226 |
| 227 template<> double doParse<double>(const char * s, bool *success) { |
| 228 if (success) { |
| 229 *success = true; |
| 230 } |
| 231 return atof(s); |
| 232 } |
| 233 |
| 234 static inline void str_replace(char *s, char search, char replace) { |
| 235 for (char *ptr = s ; *ptr ; ptr++) { |
| 236 if (*ptr == search) { |
| 237 *ptr = replace; |
| 238 } |
| 239 } |
| 240 } |
| 241 |
| 242 template<typename T> bool SkRTConfRegistry::parse(const char *name, T* value) { |
| 243 const char *str = nullptr; |
| 244 |
| 245 for (int i = fConfigFileKeys.count() - 1 ; i >= 0; i--) { |
| 246 if (fConfigFileKeys[i]->equals(name)) { |
| 247 str = fConfigFileValues[i]->c_str(); |
| 248 break; |
| 249 } |
| 250 } |
| 251 |
| 252 SkString environment_variable("skia."); |
| 253 environment_variable.append(name); |
| 254 |
| 255 const char *environment_value = getenv(environment_variable.c_str()); |
| 256 if (environment_value) { |
| 257 str = environment_value; |
| 258 } else { |
| 259 // apparently my shell doesn't let me have environment variables that |
| 260 // have periods in them, so also let the user substitute underscores. |
| 261 SkAutoTMalloc<char> underscore_name(SkStrDup(environment_variable.c_str(
))); |
| 262 str_replace(underscore_name.get(), '.', '_'); |
| 263 environment_value = getenv(underscore_name.get()); |
| 264 if (environment_value) { |
| 265 str = environment_value; |
| 266 } |
| 267 } |
| 268 |
| 269 if (!str) { |
| 270 return false; |
| 271 } |
| 272 |
| 273 bool success; |
| 274 T new_value = doParse<T>(str, &success); |
| 275 if (success) { |
| 276 *value = new_value; |
| 277 } else { |
| 278 SkDebugf("WARNING: Couldn't parse value \'%s\' for variable \'%s\'\n", |
| 279 str, name); |
| 280 } |
| 281 return success; |
| 282 } |
| 283 |
| 284 // need to explicitly instantiate the parsing function for every config type we
might have... |
| 285 |
| 286 template bool SkRTConfRegistry::parse(const char *name, bool *value); |
| 287 template bool SkRTConfRegistry::parse(const char *name, int *value); |
| 288 template bool SkRTConfRegistry::parse(const char *name, unsigned int *value); |
| 289 template bool SkRTConfRegistry::parse(const char *name, float *value); |
| 290 template bool SkRTConfRegistry::parse(const char *name, double *value); |
| 291 template bool SkRTConfRegistry::parse(const char *name, const char **value); |
| 292 |
| 293 template <typename T> void SkRTConfRegistry::set(const char *name, |
| 294 T value, |
| 295 bool warnIfNotFound) { |
| 296 SkTDArray<SkRTConfBase *> *confArray; |
| 297 if (!fConfs.find(name, &confArray)) { |
| 298 if (warnIfNotFound) { |
| 299 SkDebugf("WARNING: Attempting to set configuration value \"%s\"," |
| 300 " but I've never heard of that.\n", name); |
| 301 } |
| 302 return; |
| 303 } |
| 304 SkASSERT(confArray != nullptr); |
| 305 for (SkRTConfBase **confBase = confArray->begin(); confBase != confArray->en
d(); confBase++) { |
| 306 // static_cast here is okay because there's only one kind of child class
. |
| 307 SkRTConf<T> *concrete = static_cast<SkRTConf<T> *>(*confBase); |
| 308 |
| 309 if (concrete) { |
| 310 concrete->set(value); |
| 311 } |
| 312 } |
| 313 } |
| 314 |
| 315 template void SkRTConfRegistry::set(const char *name, bool value, bool); |
| 316 template void SkRTConfRegistry::set(const char *name, int value, bool); |
| 317 template void SkRTConfRegistry::set(const char *name, unsigned int value, bool); |
| 318 template void SkRTConfRegistry::set(const char *name, float value, bool); |
| 319 template void SkRTConfRegistry::set(const char *name, double value, bool); |
| 320 template void SkRTConfRegistry::set(const char *name, char * value, bool); |
| 321 |
| 322 SkRTConfRegistry &skRTConfRegistry() { |
| 323 static SkRTConfRegistry r; |
| 324 return r; |
| 325 } |
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