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Merge "Breakdown getWordRec"

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satok 2010-12-03 02:29:52 -08:00 committed by Android (Google) Code Review
parent 8df8d1b289 28bd03b9f5
commit cfb24365f9
2 changed files with 72 additions and 63 deletions
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129
native/src/unigram_dictionary.cpp
View File

@ -109,9 +109,7 @@ void UnigramDictionary::registerNextLetter(
}
}
bool
UnigramDictionary::addWord(unsigned short *word, int length, int frequency)
{
bool UnigramDictionary::addWord(unsigned short *word, int length, int frequency) {
word[length] = 0;
if (DEBUG_DICT) {
char s[length + 1];
@ -147,8 +145,7 @@ UnigramDictionary::addWord(unsigned short *word, int length, int frequency)
return false;
}
unsigned short
UnigramDictionary::toLowerCase(unsigned short c) {
unsigned short UnigramDictionary::toLowerCase(unsigned short c) {
if (c < sizeof(BASE_CHARS) / sizeof(BASE_CHARS[0])) {
c = BASE_CHARS[c];
}
@ -160,9 +157,7 @@ UnigramDictionary::toLowerCase(unsigned short c) {
return c;
}
bool
UnigramDictionary::sameAsTyped(unsigned short *word, int length)
{
bool UnigramDictionary::sameAsTyped(unsigned short *word, int length) {
if (length != mInputLength) {
return false;
}
@ -180,15 +175,10 @@ UnigramDictionary::sameAsTyped(unsigned short *word, int length)
static const char QUOTE = '\'';
// snr : frequency?
void
UnigramDictionary::getWordsRec(int pos, int depth, int maxDepth, bool completion, int snr,
int inputIndex, int diffs, int skipPos, int *nextLetters, int nextLettersSize)
{
void UnigramDictionary::getWordsRec(int pos, int depth, int maxDepth, bool traverseAllNodes,
int snr, int inputIndex, int diffs, int skipPos, int *nextLetters, int nextLettersSize) {
// Optimization: Prune out words that are too long compared to how much was typed.
if (depth > maxDepth) {
return;
}
if (diffs > mMaxEditDistance) {
if (depth > maxDepth || diffs > mMaxEditDistance) {
return;
}
// get the count of nodes and increment pos.
@ -196,71 +186,59 @@ UnigramDictionary::getWordsRec(int pos, int depth, int maxDepth, bool completion
int *currentChars = NULL;
// If inputIndex is greater than mInputLength, that means there are no proximity chars.
if (mInputLength <= inputIndex) {
completion = true;
traverseAllNodes = true;
} else {
currentChars = mInputCodes + (inputIndex * MAX_ALTERNATIVES);
}
for (int i = 0; i < count; i++) {
for (int i = 0; i < count; ++i) {
// -- at char
unsigned short c = Dictionary::getChar(DICT, &pos);
const unsigned short c = Dictionary::getChar(DICT, &pos);
// -- at flag/add
unsigned short lowerC = toLowerCase(c);
bool terminal = Dictionary::getTerminal(DICT, &pos);
int childrenAddress = Dictionary::getAddress(DICT, &pos);
const bool needsToContinue = childrenAddress != 0;
const unsigned short lowerC = toLowerCase(c);
const bool terminal = Dictionary::getTerminal(DICT, &pos);
const int childrenAddress = Dictionary::getAddress(DICT, &pos);
int matchedProximityCharId = -1;
const bool needsToTraverseNextNode = childrenAddress != 0;
// -- after address or flag
int freq = 1;
// If terminal, increment pos
if (terminal) freq = Dictionary::getFreq(DICT, IS_LATEST_DICT_VERSION, &pos);
// -- after add or freq
bool newTraverseAllNodes = traverseAllNodes;
int newSnr = snr;
int newDiffs = diffs;
int newInputIndex = inputIndex;
// If we are only doing completions, no need to look at the typed characters.
if (completion) {
// If we are only doing traverseAllNodes, no need to look at the typed characters.
if (traverseAllNodes || needsToSkipCurrentNode(c, currentChars[0], skipPos, depth)) {
mWord[depth] = c;
if (terminal) {
if (traverseAllNodes && terminal) {
onTerminalWhenUserTypedLengthIsGreaterThanInputLength(mWord, mInputLength, depth,
snr, nextLetters, nextLettersSize, skipPos, freq);
}
if (needsToContinue) {
// No need to do proximity suggest any more.
getWordsRec(childrenAddress, depth + 1, maxDepth, true, snr, inputIndex,
diffs, skipPos, nextLetters, nextLettersSize);
}
} else if ((c == QUOTE && currentChars[0] != QUOTE) || skipPos == depth) {
// Skip the ' or other letter and continue deeper
mWord[depth] = c;
if (needsToContinue) {
getWordsRec(childrenAddress, depth + 1, maxDepth, false, snr, inputIndex,
diffs, skipPos, nextLetters, nextLettersSize);
}
} else {
int j = 0;
while (currentChars[j] > 0) {
// Move to child node
if (currentChars[j] == lowerC || currentChars[j] == c) {
mWord[depth] = c;
const int addedWeight = j == 0 ? TYPED_LETTER_MULTIPLIER : 1;
const bool isSameAsUserTypedLength = mInputLength == inputIndex + 1;
// If inputIndex is greater than mInputLength, that means there is no
// proximity chars. So, we don't need to check proximity.
if (isSameAsUserTypedLength) {
if (terminal) {
onTerminalWhenUserTypedLengthIsSameAsInputLength(mWord, depth, snr,
skipPos, freq, addedWeight);
}
}
if (needsToContinue) {
getWordsRec(childrenAddress, depth + 1, maxDepth,
isSameAsUserTypedLength, snr * addedWeight, inputIndex + 1,
diffs + (j > 0), skipPos, nextLetters, nextLettersSize);
}
}
++j;
// If skipPos is defined, not to search proximity collections.
// First char is what user typed.
if (skipPos >= 0) break;
matchedProximityCharId = getMatchedProximityId(currentChars, lowerC, c, skipPos);
if (matchedProximityCharId < 0) continue;
mWord[depth] = c;
// If inputIndex is greater than mInputLength, that means there is no
// proximity chars. So, we don't need to check proximity.
const int addedWeight = matchedProximityCharId == 0 ? TYPED_LETTER_MULTIPLIER : 1;
const bool isSameAsUserTypedLength = mInputLength == inputIndex + 1;
if (isSameAsUserTypedLength && terminal) {
onTerminalWhenUserTypedLengthIsSameAsInputLength(mWord, depth, snr,
skipPos, freq, addedWeight);
}
if (!needsToTraverseNextNode) continue;
// Start traversing all nodes after the index exceeds the user typed length
newTraverseAllNodes = isSameAsUserTypedLength;
newSnr *= addedWeight;
newDiffs += (matchedProximityCharId > 0);
++newInputIndex;
}
if (needsToTraverseNextNode) {
getWordsRec(childrenAddress, depth + 1, maxDepth, newTraverseAllNodes,
newSnr, newInputIndex, newDiffs, skipPos, nextLetters, nextLettersSize);
}
}
}
@ -285,4 +263,29 @@ inline void UnigramDictionary::onTerminalWhenUserTypedLengthIsSameAsInputLength(
addWord(word, depth + 1, finalFreq);
}
}
inline bool UnigramDictionary::needsToSkipCurrentNode(const unsigned short c,
const unsigned short userTypedChar, const int skipPos, const int depth) {
// Skip the ' or other letter and continue deeper
return (c == QUOTE && userTypedChar != QUOTE) || skipPos == depth;
}
inline int UnigramDictionary::getMatchedProximityId(const int *currentChars,
const unsigned short lowerC, const unsigned short c, const int skipPos) {
bool matched = false;
int j = 0;
while (currentChars[j] > 0) {
matched = (currentChars[j] == lowerC || currentChars[j] == c);
// If skipPos is defined, not to search proximity collections.
// First char is what user typed.
if (matched) {
return j;
} else if (skipPos >= 0) {
return -1;
}
++j;
}
return -1;
}
} // namespace latinime

6
native/src/unigram_dictionary.h
View File

@ -53,6 +53,12 @@ private:
void onTerminalWhenUserTypedLengthIsSameAsInputLength(unsigned short *word, const int depth,
const int snr, const int skipPos, const int freq, const int addedWeight);
bool needsToSkipCurrentNode(const unsigned short c,
const unsigned short userTypedChar, const int skipPos, const int depth);
int getMatchedProximityId(const int *currentChars, const unsigned short lowerC,
const unsigned short c, const int skipPos);
const unsigned char *DICT;
const int MAX_WORDS;
const int MAX_WORD_LENGTH;