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