LatinIME/native/jni/src/words_priority_queue.cpp

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/*
* Copyright (C) 2012, 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.
*/
#include "words_priority_queue.h"
namespace latinime {
int WordsPriorityQueue::outputSuggestions(const int *before, const int beforeLength,
int *frequencies, int *outputCodePoints, int* outputTypes) {
mHighestSuggestedWord = 0;
const int size = min(MAX_WORDS, static_cast<int>(mSuggestions.size()));
SuggestedWord *swBuffer[size];
int index = size - 1;
while (!mSuggestions.empty() && index >= 0) {
SuggestedWord *sw = mSuggestions.top();
if (DEBUG_WORDS_PRIORITY_QUEUE) {
AKLOGI("dump word. %d", sw->mScore);
DUMP_WORD(sw->mWord, sw->mWordLength);
}
swBuffer[index] = sw;
mSuggestions.pop();
--index;
}
if (size >= 2) {
SuggestedWord *nsMaxSw = 0;
int maxIndex = 0;
float maxNs = 0;
for (int i = 0; i < size; ++i) {
SuggestedWord *tempSw = swBuffer[i];
if (!tempSw) {
continue;
}
const float tempNs = getNormalizedScore(tempSw, before, beforeLength, 0, 0, 0);
if (tempNs >= maxNs) {
maxNs = tempNs;
maxIndex = i;
nsMaxSw = tempSw;
}
}
if (maxIndex > 0 && nsMaxSw) {
memmove(&swBuffer[1], &swBuffer[0], maxIndex * sizeof(swBuffer[0]));
swBuffer[0] = nsMaxSw;
}
}
for (int i = 0; i < size; ++i) {
SuggestedWord *sw = swBuffer[i];
if (!sw) {
AKLOGE("SuggestedWord is null %d", i);
continue;
}
const int wordLength = sw->mWordLength;
int *targetAddress = outputCodePoints + i * MAX_WORD_LENGTH;
frequencies[i] = sw->mScore;
outputTypes[i] = sw->mType;
memcpy(targetAddress, sw->mWord, wordLength * sizeof(targetAddress[0]));
if (wordLength < MAX_WORD_LENGTH) {
targetAddress[wordLength] = 0;
}
sw->mUsed = false;
}
return size;
}
} // namespace latinime