michael@0: /*
michael@0:  * Copyright (C) 2010 The Android Open Source Project
michael@0:  *
michael@0:  * Licensed under the Apache License, Version 2.0 (the "License");
michael@0:  * you may not use this file except in compliance with the License.
michael@0:  * You may obtain a copy of the License at
michael@0:  *
michael@0:  *      http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing, software
michael@0:  * distributed under the License is distributed on an "AS IS" BASIS,
michael@0:  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0:  * See the License for the specific language governing permissions and
michael@0:  * limitations under the License.
michael@0:  */
michael@0: 
michael@0: #define LOG_TAG "VirtualKeyMap"
michael@0: #include "cutils_log.h"
michael@0: 
michael@0: #include <stdlib.h>
michael@0: #include <string.h>
michael@0: #include "VirtualKeyMap.h"
michael@0: #include <utils/Errors.h>
michael@0: #include "Tokenizer.h"
michael@0: #include <utils/Timers.h>
michael@0: 
michael@0: // Enables debug output for the parser.
michael@0: #define DEBUG_PARSER 0
michael@0: 
michael@0: // Enables debug output for parser performance.
michael@0: #define DEBUG_PARSER_PERFORMANCE 0
michael@0: 
michael@0: 
michael@0: namespace android {
michael@0: 
michael@0: static const char* WHITESPACE = " \t\r";
michael@0: static const char* WHITESPACE_OR_FIELD_DELIMITER = " \t\r:";
michael@0: 
michael@0: 
michael@0: // --- VirtualKeyMap ---
michael@0: 
michael@0: VirtualKeyMap::VirtualKeyMap() {
michael@0: }
michael@0: 
michael@0: VirtualKeyMap::~VirtualKeyMap() {
michael@0: }
michael@0: 
michael@0: status_t VirtualKeyMap::load(const String8& filename, VirtualKeyMap** outMap) {
michael@0:     *outMap = NULL;
michael@0: 
michael@0:     Tokenizer* tokenizer;
michael@0:     status_t status = Tokenizer::open(filename, &tokenizer);
michael@0:     if (status) {
michael@0:         ALOGE("Error %d opening virtual key map file %s.", status, filename.string());
michael@0:     } else {
michael@0:         VirtualKeyMap* map = new VirtualKeyMap();
michael@0:         if (!map) {
michael@0:             ALOGE("Error allocating virtual key map.");
michael@0:             status = NO_MEMORY;
michael@0:         } else {
michael@0: #if DEBUG_PARSER_PERFORMANCE
michael@0:             nsecs_t startTime = systemTime(SYSTEM_TIME_MONOTONIC);
michael@0: #endif
michael@0:             Parser parser(map, tokenizer);
michael@0:             status = parser.parse();
michael@0: #if DEBUG_PARSER_PERFORMANCE
michael@0:             nsecs_t elapsedTime = systemTime(SYSTEM_TIME_MONOTONIC) - startTime;
michael@0:             ALOGD("Parsed key character map file '%s' %d lines in %0.3fms.",
michael@0:                     tokenizer->getFilename().string(), tokenizer->getLineNumber(),
michael@0:                     elapsedTime / 1000000.0);
michael@0: #endif
michael@0:             if (status) {
michael@0:                 delete map;
michael@0:             } else {
michael@0:                 *outMap = map;
michael@0:             }
michael@0:         }
michael@0:         delete tokenizer;
michael@0:     }
michael@0:     return status;
michael@0: }
michael@0: 
michael@0: 
michael@0: // --- VirtualKeyMap::Parser ---
michael@0: 
michael@0: VirtualKeyMap::Parser::Parser(VirtualKeyMap* map, Tokenizer* tokenizer) :
michael@0:         mMap(map), mTokenizer(tokenizer) {
michael@0: }
michael@0: 
michael@0: VirtualKeyMap::Parser::~Parser() {
michael@0: }
michael@0: 
michael@0: status_t VirtualKeyMap::Parser::parse() {
michael@0:     while (!mTokenizer->isEof()) {
michael@0: #if DEBUG_PARSER
michael@0:         ALOGD("Parsing %s: '%s'.", mTokenizer->getLocation().string(),
michael@0:                 mTokenizer->peekRemainderOfLine().string());
michael@0: #endif
michael@0: 
michael@0:         mTokenizer->skipDelimiters(WHITESPACE);
michael@0: 
michael@0:         if (!mTokenizer->isEol() && mTokenizer->peekChar() != '#') {
michael@0:             // Multiple keys can appear on one line or they can be broken up across multiple lines.
michael@0:             do {
michael@0:                 String8 token = mTokenizer->nextToken(WHITESPACE_OR_FIELD_DELIMITER);
michael@0:                 if (token != "0x01") {
michael@0:                     ALOGE("%s: Unknown virtual key type, expected 0x01.",
michael@0:                           mTokenizer->getLocation().string());
michael@0:                     return BAD_VALUE;
michael@0:                 }
michael@0: 
michael@0:                 VirtualKeyDefinition defn;
michael@0:                 bool success = parseNextIntField(&defn.scanCode)
michael@0:                         && parseNextIntField(&defn.centerX)
michael@0:                         && parseNextIntField(&defn.centerY)
michael@0:                         && parseNextIntField(&defn.width)
michael@0:                         && parseNextIntField(&defn.height);
michael@0:                 if (!success) {
michael@0:                     ALOGE("%s: Expected 5 colon-delimited integers in virtual key definition.",
michael@0:                           mTokenizer->getLocation().string());
michael@0:                     return BAD_VALUE;
michael@0:                 }
michael@0: 
michael@0: #if DEBUG_PARSER
michael@0:                 ALOGD("Parsed virtual key: scanCode=%d, centerX=%d, centerY=%d, "
michael@0:                         "width=%d, height=%d",
michael@0:                         defn.scanCode, defn.centerX, defn.centerY, defn.width, defn.height);
michael@0: #endif
michael@0:                 mMap->mVirtualKeys.push(defn);
michael@0:             } while (consumeFieldDelimiterAndSkipWhitespace());
michael@0: 
michael@0:             if (!mTokenizer->isEol()) {
michael@0:                 ALOGE("%s: Expected end of line, got '%s'.",
michael@0:                         mTokenizer->getLocation().string(),
michael@0:                         mTokenizer->peekRemainderOfLine().string());
michael@0:                 return BAD_VALUE;
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         mTokenizer->nextLine();
michael@0:     }
michael@0: 
michael@0:     return NO_ERROR;
michael@0: }
michael@0: 
michael@0: bool VirtualKeyMap::Parser::consumeFieldDelimiterAndSkipWhitespace() {
michael@0:     mTokenizer->skipDelimiters(WHITESPACE);
michael@0:     if (mTokenizer->peekChar() == ':') {
michael@0:         mTokenizer->nextChar();
michael@0:         mTokenizer->skipDelimiters(WHITESPACE);
michael@0:         return true;
michael@0:     }
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: bool VirtualKeyMap::Parser::parseNextIntField(int32_t* outValue) {
michael@0:     if (!consumeFieldDelimiterAndSkipWhitespace()) {
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     String8 token = mTokenizer->nextToken(WHITESPACE_OR_FIELD_DELIMITER);
michael@0:     char* end;
michael@0:     *outValue = strtol(token.string(), &end, 0);
michael@0:     if (token.isEmpty() || *end != '\0') {
michael@0:         ALOGE("Expected an integer, got '%s'.", token.string());
michael@0:         return false;
michael@0:     }
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: } // namespace android