215 lines
6.2 KiB
C++
215 lines
6.2 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "PropertyMap"
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#include <utils/PropertyMap.h>
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// Enables debug output for the parser.
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#define DEBUG_PARSER 0
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// Enables debug output for parser performance.
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#define DEBUG_PARSER_PERFORMANCE 0
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namespace android {
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static const char* WHITESPACE = " \t\r";
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static const char* WHITESPACE_OR_PROPERTY_DELIMITER = " \t\r=";
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// --- PropertyMap ---
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PropertyMap::PropertyMap() {
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}
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PropertyMap::~PropertyMap() {
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}
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void PropertyMap::clear() {
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mProperties.clear();
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}
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void PropertyMap::addProperty(const String8& key, const String8& value) {
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mProperties.add(key, value);
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}
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bool PropertyMap::hasProperty(const String8& key) const {
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return mProperties.indexOfKey(key) >= 0;
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}
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bool PropertyMap::tryGetProperty(const String8& key, String8& outValue) const {
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ssize_t index = mProperties.indexOfKey(key);
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if (index < 0) {
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return false;
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}
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outValue = mProperties.valueAt(index);
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return true;
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}
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bool PropertyMap::tryGetProperty(const String8& key, bool& outValue) const {
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int32_t intValue;
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if (!tryGetProperty(key, intValue)) {
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return false;
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}
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outValue = intValue;
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return true;
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}
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bool PropertyMap::tryGetProperty(const String8& key, int32_t& outValue) const {
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String8 stringValue;
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if (! tryGetProperty(key, stringValue) || stringValue.length() == 0) {
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return false;
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}
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char* end;
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int value = strtol(stringValue.string(), & end, 10);
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if (*end != '\0') {
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ALOGW("Property key '%s' has invalid value '%s'. Expected an integer.",
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key.string(), stringValue.string());
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return false;
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}
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outValue = value;
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return true;
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}
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bool PropertyMap::tryGetProperty(const String8& key, float& outValue) const {
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String8 stringValue;
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if (! tryGetProperty(key, stringValue) || stringValue.length() == 0) {
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return false;
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}
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char* end;
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float value = strtof(stringValue.string(), & end);
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if (*end != '\0') {
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ALOGW("Property key '%s' has invalid value '%s'. Expected a float.",
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key.string(), stringValue.string());
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return false;
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}
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outValue = value;
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return true;
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}
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void PropertyMap::addAll(const PropertyMap* map) {
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for (size_t i = 0; i < map->mProperties.size(); i++) {
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mProperties.add(map->mProperties.keyAt(i), map->mProperties.valueAt(i));
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}
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}
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status_t PropertyMap::load(const String8& filename, PropertyMap** outMap) {
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*outMap = nullptr;
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Tokenizer* tokenizer;
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status_t status = Tokenizer::open(filename, &tokenizer);
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if (status) {
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ALOGE("Error %d opening property file %s.", status, filename.string());
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} else {
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PropertyMap* map = new PropertyMap();
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if (!map) {
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ALOGE("Error allocating property map.");
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status = NO_MEMORY;
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} else {
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#if DEBUG_PARSER_PERFORMANCE
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nsecs_t startTime = systemTime(SYSTEM_TIME_MONOTONIC);
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#endif
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Parser parser(map, tokenizer);
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status = parser.parse();
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#if DEBUG_PARSER_PERFORMANCE
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nsecs_t elapsedTime = systemTime(SYSTEM_TIME_MONOTONIC) - startTime;
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ALOGD("Parsed property file '%s' %d lines in %0.3fms.",
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tokenizer->getFilename().string(), tokenizer->getLineNumber(),
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elapsedTime / 1000000.0);
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#endif
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if (status) {
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delete map;
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} else {
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*outMap = map;
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}
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}
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delete tokenizer;
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}
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return status;
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}
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// --- PropertyMap::Parser ---
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PropertyMap::Parser::Parser(PropertyMap* map, Tokenizer* tokenizer) :
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mMap(map), mTokenizer(tokenizer) {
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}
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PropertyMap::Parser::~Parser() {
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}
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status_t PropertyMap::Parser::parse() {
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while (!mTokenizer->isEof()) {
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#if DEBUG_PARSER
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ALOGD("Parsing %s: '%s'.", mTokenizer->getLocation().string(),
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mTokenizer->peekRemainderOfLine().string());
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#endif
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mTokenizer->skipDelimiters(WHITESPACE);
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if (!mTokenizer->isEol() && mTokenizer->peekChar() != '#') {
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String8 keyToken = mTokenizer->nextToken(WHITESPACE_OR_PROPERTY_DELIMITER);
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if (keyToken.isEmpty()) {
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ALOGE("%s: Expected non-empty property key.", mTokenizer->getLocation().string());
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return BAD_VALUE;
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}
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mTokenizer->skipDelimiters(WHITESPACE);
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if (mTokenizer->nextChar() != '=') {
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ALOGE("%s: Expected '=' between property key and value.",
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mTokenizer->getLocation().string());
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return BAD_VALUE;
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}
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mTokenizer->skipDelimiters(WHITESPACE);
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String8 valueToken = mTokenizer->nextToken(WHITESPACE);
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if (valueToken.find("\\", 0) >= 0 || valueToken.find("\"", 0) >= 0) {
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ALOGE("%s: Found reserved character '\\' or '\"' in property value.",
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mTokenizer->getLocation().string());
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return BAD_VALUE;
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}
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mTokenizer->skipDelimiters(WHITESPACE);
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if (!mTokenizer->isEol()) {
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ALOGE("%s: Expected end of line, got '%s'.",
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mTokenizer->getLocation().string(),
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mTokenizer->peekRemainderOfLine().string());
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return BAD_VALUE;
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}
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if (mMap->hasProperty(keyToken)) {
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ALOGE("%s: Duplicate property value for key '%s'.",
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mTokenizer->getLocation().string(), keyToken.string());
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return BAD_VALUE;
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}
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mMap->addProperty(keyToken, valueToken);
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}
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mTokenizer->nextLine();
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}
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return OK;
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}
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} // namespace android
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