The Tor Browser: gfx/skia/trunk/src/utils/SkRTConf.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/utils/SkRTConf.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/utils/SkRTConf.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkRTConf.h"
 #include "SkOSFile.h"
 SkRTConfRegistry::SkRTConfRegistry(): fConfs(100) {
     SkFILE *fp = sk_fopen(configFileLocation(), kRead_SkFILE_Flag);
     if (!fp) {
         return;
     }
     char line[1024];
     while (!sk_feof(fp)) {
         if (!sk_fgets(line, sizeof(line), fp)) {
             break;
         }
         char *commentptr = strchr(line, '#');
         if (commentptr == line) {
             continue;
         }
         if (NULL != commentptr) {
             *commentptr = '\0';
         }
         char sep[] = " \t\r\n";
         char *keyptr = strtok(line, sep);
         if (!keyptr) {
             continue;
         }
         char *valptr = strtok(NULL, sep);
         if (!valptr) {
             continue;
         }
         SkString* key = SkNEW_ARGS(SkString,(keyptr));
         SkString* val = SkNEW_ARGS(SkString,(valptr));
         fConfigFileKeys.append(1, &key);
         fConfigFileValues.append(1, &val);
     }
     sk_fclose(fp);
 }
 SkRTConfRegistry::~SkRTConfRegistry() {
     ConfMap::Iter iter(fConfs);
     SkTDArray<SkRTConfBase *> *confArray;
     while (iter.next(&confArray)) {
         delete confArray;
     }
     for (int i = 0 ; i < fConfigFileKeys.count() ; i++) {
         SkDELETE(fConfigFileKeys[i]);
         SkDELETE(fConfigFileValues[i]);
     }
 }
 const char *SkRTConfRegistry::configFileLocation() const {
     return "skia.conf"; // for now -- should probably do something fancier like home directories or whatever.
 }
 // dump all known runtime config options to the file with their default values.
 // to trigger this, make a config file of zero size.
 void SkRTConfRegistry::possiblyDumpFile() const {
     const char *path = configFileLocation();
     SkFILE *fp = sk_fopen(path, kRead_SkFILE_Flag);
     if (!fp) {
         return;
     }
     size_t configFileSize = sk_fgetsize(fp);
     if (configFileSize == 0) {
         printAll(path);
     }
     sk_fclose(fp);
 }
 // Run through every provided configuration option and print a warning if the user hasn't
 // declared a correponding configuration object somewhere.
 void SkRTConfRegistry::validate() const {
     for (int i = 0 ; i < fConfigFileKeys.count() ; i++) {
         if (!fConfs.find(fConfigFileKeys[i]->c_str())) {
             SkDebugf("WARNING: You have config value %s in your configuration file, but I've never heard of that.\n", fConfigFileKeys[i]->c_str());
         }
     }
 }
 void SkRTConfRegistry::printAll(const char *fname) const {
     SkWStream *o;
     if (NULL != fname) {
         o = new SkFILEWStream(fname);
     } else {
         o = new SkDebugWStream();
     }
     ConfMap::Iter iter(fConfs);
     SkTDArray<SkRTConfBase *> *confArray;
     while (iter.next(&confArray)) {
         if (confArray->getAt(0)->isDefault()) {
             o->writeText("# ");
         }
         confArray->getAt(0)->print(o);
         o->newline();
     }
     delete o;
 }
 bool SkRTConfRegistry::hasNonDefault() const {
     ConfMap::Iter iter(fConfs);
     SkTDArray<SkRTConfBase *> *confArray;
     while (iter.next(&confArray)) {
         if (!confArray->getAt(0)->isDefault()) {
             return true;
         }
     }
     return false;
 }
 void SkRTConfRegistry::printNonDefault(const char *fname) const {
     SkWStream *o;
     if (NULL != fname) {
         o = new SkFILEWStream(fname);
     } else {
         o = new SkDebugWStream();
     }
     ConfMap::Iter iter(fConfs);
     SkTDArray<SkRTConfBase *> *confArray;
     while (iter.next(&confArray)) {
         if (!confArray->getAt(0)->isDefault()) {
             confArray->getAt(0)->print(o);
             o->newline();
         }
     }
     delete o;
 }
 // register a configuration variable after its value has been set by the parser.
 // we maintain a vector of these things instead of just a single one because the
 // user might set the value after initialization time and we need to have
 // all the pointers lying around, not just one.
 void SkRTConfRegistry::registerConf(SkRTConfBase *conf) {
     SkTDArray<SkRTConfBase *> *confArray;
     if (fConfs.find(conf->getName(), &confArray)) {
         if (!conf->equals(confArray->getAt(0))) {
             SkDebugf("WARNING: Skia config \"%s\" was registered more than once in incompatible ways.\n", conf->getName());
         } else {
             confArray->append(1, &conf);
         }
     } else {
         confArray = new SkTDArray<SkRTConfBase *>;
         confArray->append(1, &conf);
         fConfs.set(conf->getName(),confArray);
     }
 }
 template <typename T> T doParse(const char *, bool *success ) {
     SkDebugf("WARNING: Invoked non-specialized doParse function...\n");
     if (success) {
         *success = false;
     }
     return (T) 0;
 }
 template<> bool doParse<bool>(const char *s, bool *success) {
     if (success) {
         *success = true;
     }
     if (!strcmp(s,"1") || !strcmp(s,"true")) {
         return true;
     }
     if (!strcmp(s,"0") || !strcmp(s,"false")) {
         return false;
     }
     if (success) {
         *success = false;
     }
     return false;
 }
 template<> const char * doParse<const char *>(const char * s, bool *success) {
     if (success) {
         *success = true;
     }
     return s;
 }
 template<> int doParse<int>(const char * s, bool *success) {
     if (success) {
         *success = true;
     }
     return atoi(s);
 }
 template<> unsigned int doParse<unsigned int>(const char * s, bool *success) {
     if (success) {
         *success = true;
     }
     return (unsigned int) atoi(s);
 }
 template<> float doParse<float>(const char * s, bool *success) {
     if (success) {
         *success = true;
     }
     return (float) atof(s);
 }
 template<> double doParse<double>(const char * s, bool *success) {
     if (success) {
         *success = true;
     }
     return atof(s);
 }
 static inline void str_replace(char *s, char search, char replace) {
     for (char *ptr = s ; *ptr ; ptr++) {
         if (*ptr == search) {
             *ptr = replace;
         }
     }
 }
 template<typename T> bool SkRTConfRegistry::parse(const char *name, T* value) {
     const char *str = NULL;
     for (int i = fConfigFileKeys.count() - 1 ; i >= 0; i--) {
         if (fConfigFileKeys[i]->equals(name)) {
             str = fConfigFileValues[i]->c_str();
             break;
         }
     }
     SkString environment_variable("skia.");
     environment_variable.append(name);
     const char *environment_value = getenv(environment_variable.c_str());
     if (environment_value) {
         str = environment_value;
     } else {
         // apparently my shell doesn't let me have environment variables that
         // have periods in them, so also let the user substitute underscores.
         SkAutoTMalloc<char> underscore_name(SkStrDup(environment_variable.c_str()));
         str_replace(underscore_name.get(), '.', '_');
         environment_value = getenv(underscore_name.get());
         if (environment_value) {
             str = environment_value;
         }
     }
     if (!str) {
         return false;
     }
     bool success;
     T new_value = doParse<T>(str, &success);
     if (success) {
         *value = new_value;
     } else {
         SkDebugf("WARNING: Couldn't parse value \'%s\' for variable \'%s\'\n",
                  str, name);
     }
     return success;
 }
 // need to explicitly instantiate the parsing function for every config type we might have...
 template bool SkRTConfRegistry::parse(const char *name, bool *value);
 template bool SkRTConfRegistry::parse(const char *name, int *value);
 template bool SkRTConfRegistry::parse(const char *name, unsigned int *value);
 template bool SkRTConfRegistry::parse(const char *name, float *value);
 template bool SkRTConfRegistry::parse(const char *name, double *value);
 template bool SkRTConfRegistry::parse(const char *name, const char **value);
 template <typename T> void SkRTConfRegistry::set(const char *name,
                                                  T value,
                                                  bool warnIfNotFound) {
     SkTDArray<SkRTConfBase *> *confArray;
     if (!fConfs.find(name, &confArray)) {
         if (warnIfNotFound) {
             SkDebugf("WARNING: Attempting to set configuration value \"%s\","
                      " but I've never heard of that.\n", name);
         }
         return;
     }
     SkASSERT(confArray != NULL);
     for (SkRTConfBase **confBase = confArray->begin(); confBase != confArray->end(); confBase++) {
         // static_cast here is okay because there's only one kind of child class.
         SkRTConf<T> *concrete = static_cast<SkRTConf<T> *>(*confBase);
         if (concrete) {
             concrete->set(value);
         }
     }
 }
 template void SkRTConfRegistry::set(const char *name, bool value, bool);
 template void SkRTConfRegistry::set(const char *name, int value, bool);
 template void SkRTConfRegistry::set(const char *name, unsigned int value, bool);
 template void SkRTConfRegistry::set(const char *name, float value, bool);
 template void SkRTConfRegistry::set(const char *name, double value, bool);
 template void SkRTConfRegistry::set(const char *name, char * value, bool);
 SkRTConfRegistry &skRTConfRegistry() {
     static SkRTConfRegistry r;
     return r;
 }
 #ifdef SK_SUPPORT_UNITTEST
 #ifdef SK_BUILD_FOR_WIN32
 static void sk_setenv(const char* key, const char* value) {
     _putenv_s(key, value);
 }
 #else
 static void sk_setenv(const char* key, const char* value) {
     setenv(key, value, 1);
 }
 #endif
 void SkRTConfRegistry::UnitTest() {
     SkRTConfRegistry registryWithoutContents(true);
     sk_setenv("skia_nonexistent_item", "132");
     int result = 0;
     registryWithoutContents.parse("nonexistent.item", &result);
     SkASSERT(result == 132);
 }
 SkRTConfRegistry::SkRTConfRegistry(bool)
     : fConfs(100) {
 }
 #endif

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gfx/skia/trunk/src/utils/SkRTConf.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/utils/SkRTConf.cpp