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Create .cpp file for NgramContext.

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Bug: 14425059

Change-Id: Ie950878817b9c80cc9c970e1a84880c9b9ab228a
This commit is contained in:
Keisuke Kuroyanagi 2014-10-21 17:04:56 +09:00
parent 47fc656cd7
commit f87bb77a91
3 changed files with 140 additions and 107 deletions
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1
native/jni/NativeFileList.mk
View file

@ -40,6 +40,7 @@ LATIN_IME_CORE_SRC_FILES := \
proximity_info_state_utils.cpp) \
suggest/core/policy/weighting.cpp \
suggest/core/session/dic_traverse_session.cpp \
suggest/core/session/ngram_context.cpp \
$(addprefix suggest/core/result/, \
suggestion_results.cpp \
suggestions_output_utils.cpp) \

123
native/jni/src/suggest/core/session/ngram_context.cpp Normal file
View file

@ -0,0 +1,123 @@
/*
* Copyright (C) 2014 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 "suggest/core/session/ngram_context.h"
#include "suggest/core/policy/dictionary_structure_with_buffer_policy.h"
#include "utils/char_utils.h"
namespace latinime {
NgramContext::NgramContext() : mPrevWordCount(0) {}
NgramContext::NgramContext(const NgramContext &ngramContext)
: mPrevWordCount(ngramContext.mPrevWordCount) {
for (size_t i = 0; i < mPrevWordCount; ++i) {
mPrevWordCodePointCount[i] = ngramContext.mPrevWordCodePointCount[i];
memmove(mPrevWordCodePoints[i], ngramContext.mPrevWordCodePoints[i],
sizeof(mPrevWordCodePoints[i][0]) * mPrevWordCodePointCount[i]);
mIsBeginningOfSentence[i] = ngramContext.mIsBeginningOfSentence[i];
}
}
NgramContext::NgramContext(const int prevWordCodePoints[][MAX_WORD_LENGTH],
const int *const prevWordCodePointCount, const bool *const isBeginningOfSentence,
const size_t prevWordCount)
: mPrevWordCount(std::min(NELEMS(mPrevWordCodePoints), prevWordCount)) {
clear();
for (size_t i = 0; i < mPrevWordCount; ++i) {
if (prevWordCodePointCount[i] < 0 || prevWordCodePointCount[i] > MAX_WORD_LENGTH) {
continue;
}
memmove(mPrevWordCodePoints[i], prevWordCodePoints[i],
sizeof(mPrevWordCodePoints[i][0]) * prevWordCodePointCount[i]);
mPrevWordCodePointCount[i] = prevWordCodePointCount[i];
mIsBeginningOfSentence[i] = isBeginningOfSentence[i];
}
}
NgramContext::NgramContext(const int *const prevWordCodePoints, const int prevWordCodePointCount,
const bool isBeginningOfSentence) : mPrevWordCount(1) {
clear();
if (prevWordCodePointCount > MAX_WORD_LENGTH || !prevWordCodePoints) {
return;
}
memmove(mPrevWordCodePoints[0], prevWordCodePoints,
sizeof(mPrevWordCodePoints[0][0]) * prevWordCodePointCount);
mPrevWordCodePointCount[0] = prevWordCodePointCount;
mIsBeginningOfSentence[0] = isBeginningOfSentence;
}
bool NgramContext::isValid() const {
if (mPrevWordCodePointCount[0] > 0) {
return true;
}
if (mIsBeginningOfSentence[0]) {
return true;
}
return false;
}
const CodePointArrayView NgramContext::getNthPrevWordCodePoints(const size_t n) const {
if (n <= 0 || n > mPrevWordCount) {
return CodePointArrayView();
}
return CodePointArrayView(mPrevWordCodePoints[n - 1], mPrevWordCodePointCount[n - 1]);
}
bool NgramContext::isNthPrevWordBeginningOfSentence(const size_t n) const {
if (n <= 0 || n > mPrevWordCount) {
return false;
}
return mIsBeginningOfSentence[n - 1];
}
/* static */ int NgramContext::getWordId(
const DictionaryStructureWithBufferPolicy *const dictStructurePolicy,
const int *const wordCodePoints, const int wordCodePointCount,
const bool isBeginningOfSentence, const bool tryLowerCaseSearch) {
if (!dictStructurePolicy || !wordCodePoints || wordCodePointCount > MAX_WORD_LENGTH) {
return NOT_A_WORD_ID;
}
int codePoints[MAX_WORD_LENGTH];
int codePointCount = wordCodePointCount;
memmove(codePoints, wordCodePoints, sizeof(int) * codePointCount);
if (isBeginningOfSentence) {
codePointCount = CharUtils::attachBeginningOfSentenceMarker(codePoints, codePointCount,
MAX_WORD_LENGTH);
if (codePointCount <= 0) {
return NOT_A_WORD_ID;
}
}
const CodePointArrayView codePointArrayView(codePoints, codePointCount);
const int wordId = dictStructurePolicy->getWordId(codePointArrayView,
false /* forceLowerCaseSearch */);
if (wordId != NOT_A_WORD_ID || !tryLowerCaseSearch) {
// Return the id when when the word was found or doesn't try lower case search.
return wordId;
}
// Check bigrams for lower-cased previous word if original was not found. Useful for
// auto-capitalized words like "The [current_word]".
return dictStructurePolicy->getWordId(codePointArrayView, true /* forceLowerCaseSearch */);
}
void NgramContext::clear() {
for (size_t i = 0; i < NELEMS(mPrevWordCodePoints); ++i) {
mPrevWordCodePointCount[i] = 0;
mIsBeginningOfSentence[i] = false;
}
}
} // namespace latinime

121
native/jni/src/suggest/core/session/ngram_context.h
View file

@ -20,145 +20,54 @@
#include <array>
#include "defines.h"
#include "suggest/core/policy/dictionary_structure_with_buffer_policy.h"
#include "utils/char_utils.h"
#include "utils/int_array_view.h"
namespace latinime {
// Rename to NgramContext.
class DictionaryStructureWithBufferPolicy;
class NgramContext {
public:
// No prev word information.
NgramContext() : mPrevWordCount(0) {
clear();
}
NgramContext(const NgramContext &ngramContext)
: mPrevWordCount(ngramContext.mPrevWordCount) {
for (size_t i = 0; i < mPrevWordCount; ++i) {
mPrevWordCodePointCount[i] = ngramContext.mPrevWordCodePointCount[i];
memmove(mPrevWordCodePoints[i], ngramContext.mPrevWordCodePoints[i],
sizeof(mPrevWordCodePoints[i][0]) * mPrevWordCodePointCount[i]);
mIsBeginningOfSentence[i] = ngramContext.mIsBeginningOfSentence[i];
}
}
NgramContext();
// Copy constructor to use this class with std::vector and use this class as a return value.
NgramContext(const NgramContext &ngramContext);
// Construct from previous words.
NgramContext(const int prevWordCodePoints[][MAX_WORD_LENGTH],
const int *const prevWordCodePointCount, const bool *const isBeginningOfSentence,
const size_t prevWordCount)
: mPrevWordCount(std::min(NELEMS(mPrevWordCodePoints), prevWordCount)) {
clear();
for (size_t i = 0; i < mPrevWordCount; ++i) {
if (prevWordCodePointCount[i] < 0 || prevWordCodePointCount[i] > MAX_WORD_LENGTH) {
continue;
}
memmove(mPrevWordCodePoints[i], prevWordCodePoints[i],
sizeof(mPrevWordCodePoints[i][0]) * prevWordCodePointCount[i]);
mPrevWordCodePointCount[i] = prevWordCodePointCount[i];
mIsBeginningOfSentence[i] = isBeginningOfSentence[i];
}
}
const size_t prevWordCount);
// Construct from a previous word.
NgramContext(const int *const prevWordCodePoints, const int prevWordCodePointCount,
const bool isBeginningOfSentence) : mPrevWordCount(1) {
clear();
if (prevWordCodePointCount > MAX_WORD_LENGTH || !prevWordCodePoints) {
return;
}
memmove(mPrevWordCodePoints[0], prevWordCodePoints,
sizeof(mPrevWordCodePoints[0][0]) * prevWordCodePointCount);
mPrevWordCodePointCount[0] = prevWordCodePointCount;
mIsBeginningOfSentence[0] = isBeginningOfSentence;
}
const bool isBeginningOfSentence);
size_t getPrevWordCount() const {
return mPrevWordCount;
}
// TODO: Remove.
const NgramContext getTrimmedNgramContext(const size_t maxPrevWordCount) const {
return NgramContext(mPrevWordCodePoints, mPrevWordCodePointCount, mIsBeginningOfSentence,
std::min(mPrevWordCount, maxPrevWordCount));
}
bool isValid() const {
if (mPrevWordCodePointCount[0] > 0) {
return true;
}
if (mIsBeginningOfSentence[0]) {
return true;
}
return false;
}
bool isValid() const;
template<size_t N>
const WordIdArrayView getPrevWordIds(
const DictionaryStructureWithBufferPolicy *const dictStructurePolicy,
std::array<int, N> *const prevWordIdBuffer, const bool tryLowerCaseSearch) const {
WordIdArray<N> *const prevWordIdBuffer, const bool tryLowerCaseSearch) const {
for (size_t i = 0; i < std::min(mPrevWordCount, N); ++i) {
prevWordIdBuffer->at(i) = getWordId(dictStructurePolicy,
mPrevWordCodePoints[i], mPrevWordCodePointCount[i],
mIsBeginningOfSentence[i], tryLowerCaseSearch);
prevWordIdBuffer->at(i) = getWordId(dictStructurePolicy, mPrevWordCodePoints[i],
mPrevWordCodePointCount[i], mIsBeginningOfSentence[i], tryLowerCaseSearch);
}
return WordIdArrayView::fromArray(*prevWordIdBuffer).limit(mPrevWordCount);
}
// n is 1-indexed.
const CodePointArrayView getNthPrevWordCodePoints(const size_t n) const {
if (n <= 0 || n > mPrevWordCount) {
return CodePointArrayView();
}
return CodePointArrayView(mPrevWordCodePoints[n - 1], mPrevWordCodePointCount[n - 1]);
}
const CodePointArrayView getNthPrevWordCodePoints(const size_t n) const;
// n is 1-indexed.
bool isNthPrevWordBeginningOfSentence(const size_t n) const {
if (n <= 0 || n > mPrevWordCount) {
return false;
}
return mIsBeginningOfSentence[n - 1];
}
bool isNthPrevWordBeginningOfSentence(const size_t n) const;
private:
DISALLOW_ASSIGNMENT_OPERATOR(NgramContext);
static int getWordId(const DictionaryStructureWithBufferPolicy *const dictStructurePolicy,
const int *const wordCodePoints, const int wordCodePointCount,
const bool isBeginningOfSentence, const bool tryLowerCaseSearch) {
if (!dictStructurePolicy || !wordCodePoints || wordCodePointCount > MAX_WORD_LENGTH) {
return NOT_A_WORD_ID;
}
int codePoints[MAX_WORD_LENGTH];
int codePointCount = wordCodePointCount;
memmove(codePoints, wordCodePoints, sizeof(int) * codePointCount);
if (isBeginningOfSentence) {
codePointCount = CharUtils::attachBeginningOfSentenceMarker(codePoints,
codePointCount, MAX_WORD_LENGTH);
if (codePointCount <= 0) {
return NOT_A_WORD_ID;
}
}
const CodePointArrayView codePointArrayView(codePoints, codePointCount);
const int wordId = dictStructurePolicy->getWordId(
codePointArrayView, false /* forceLowerCaseSearch */);
if (wordId != NOT_A_WORD_ID || !tryLowerCaseSearch) {
// Return the id when when the word was found or doesn't try lower case search.
return wordId;
}
// Check bigrams for lower-cased previous word if original was not found. Useful for
// auto-capitalized words like "The [current_word]".
return dictStructurePolicy->getWordId(codePointArrayView, true /* forceLowerCaseSearch */);
}
void clear() {
for (size_t i = 0; i < NELEMS(mPrevWordCodePoints); ++i) {
mPrevWordCodePointCount[i] = 0;
mIsBeginningOfSentence[i] = false;
}
}
const bool isBeginningOfSentence, const bool tryLowerCaseSearch);
void clear();
const size_t mPrevWordCount;
int mPrevWordCodePoints[MAX_PREV_WORD_COUNT_FOR_N_GRAM][MAX_WORD_LENGTH];