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Rename variables with obscure names.

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The `snr' variable has a very obscure name. Rename it to `matchWeight'.
Also, the `toLowerCase' function is error-prone, since it actually returns
a lower case version of the BASE char, that is without diacritics. Hence,
rename it to `toBaseLowerCase' and update variables with similar names.

Change-Id: Ibdbe73018a33ee864db59a51d664c3b104d5fb3f
This commit is contained in:
Jean Chalard 2011-02-22 15:12:46 +09:00
parent a5d5849701
commit f5f834afcd
2 changed files with 37 additions and 34 deletions
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69
native/src/unigram_dictionary.cpp
View File

@ -182,7 +182,7 @@ bool UnigramDictionary::addWord(unsigned short *word, int length, int frequency)
return false;
}
unsigned short UnigramDictionary::toLowerCase(unsigned short c) {
unsigned short UnigramDictionary::toBaseLowerCase(unsigned short c) {
if (c < sizeof(BASE_CHARS) / sizeof(BASE_CHARS[0])) {
c = BASE_CHARS[c];
}
@ -238,7 +238,7 @@ void UnigramDictionary::getSuggestionCandidates(const int skipPos,
if (mStackChildCount[depth] > 0) {
--mStackChildCount[depth];
bool traverseAllNodes = mStackTraverseAll[depth];
int snr = mStackNodeFreq[depth];
int matchWeight = mStackNodeFreq[depth];
int inputIndex = mStackInputIndex[depth];
int diffs = mStackDiffs[depth];
int siblingPos = mStackSiblingPos[depth];
@ -246,9 +246,10 @@ void UnigramDictionary::getSuggestionCandidates(const int skipPos,
// depth will never be greater than maxDepth because in that case,
// needsToTraverseChildrenNodes should be false
const bool needsToTraverseChildrenNodes = processCurrentNode(siblingPos, depth,
maxDepth, traverseAllNodes, snr, inputIndex, diffs, skipPos, excessivePos,
transposedPos, nextLetters, nextLettersSize, &childCount, &firstChildPos,
&traverseAllNodes, &snr, &inputIndex, &diffs, &siblingPos);
maxDepth, traverseAllNodes, matchWeight, inputIndex, diffs, skipPos,
excessivePos, transposedPos, nextLetters, nextLettersSize, &childCount,
&firstChildPos, &traverseAllNodes, &matchWeight, &inputIndex, &diffs,
&siblingPos);
// Update next sibling pos
mStackSiblingPos[depth] = siblingPos;
if (needsToTraverseChildrenNodes) {
@ -256,7 +257,7 @@ void UnigramDictionary::getSuggestionCandidates(const int skipPos,
++depth;
mStackChildCount[depth] = childCount;
mStackTraverseAll[depth] = traverseAllNodes;
mStackNodeFreq[depth] = snr;
mStackNodeFreq[depth] = matchWeight;
mStackInputIndex[depth] = inputIndex;
mStackDiffs[depth] = diffs;
mStackSiblingPos[depth] = firstChildPos;
@ -319,29 +320,30 @@ void UnigramDictionary::getWordsOld(const int initialPos, const int inputLength,
}
void UnigramDictionary::getWordsRec(const int childrenCount, const int pos, const int depth,
const int maxDepth, const bool traverseAllNodes, const int snr, const int inputIndex,
const int diffs, const int skipPos, const int excessivePos, const int transposedPos,
int *nextLetters, const int nextLettersSize) {
const int maxDepth, const bool traverseAllNodes, const int matchWeight,
const int inputIndex, const int diffs, const int skipPos, const int excessivePos,
const int transposedPos, int *nextLetters, const int nextLettersSize) {
int siblingPos = pos;
for (int i = 0; i < childrenCount; ++i) {
int newCount;
int newChildPosition;
const int newDepth = depth + 1;
bool newTraverseAllNodes;
int newSnr;
int newMatchRate;
int newInputIndex;
int newDiffs;
int newSiblingPos;
const bool needsToTraverseChildrenNodes = processCurrentNode(siblingPos, depth, maxDepth,
traverseAllNodes, snr, inputIndex, diffs, skipPos, excessivePos, transposedPos,
traverseAllNodes, matchWeight, inputIndex, diffs,
skipPos, excessivePos, transposedPos,
nextLetters, nextLettersSize,
&newCount, &newChildPosition, &newTraverseAllNodes, &newSnr,
&newCount, &newChildPosition, &newTraverseAllNodes, &newMatchRate,
&newInputIndex, &newDiffs, &newSiblingPos);
siblingPos = newSiblingPos;
if (needsToTraverseChildrenNodes) {
getWordsRec(newCount, newChildPosition, newDepth, maxDepth, newTraverseAllNodes,
newSnr, newInputIndex, newDiffs, skipPos, excessivePos, transposedPos,
newMatchRate, newInputIndex, newDiffs, skipPos, excessivePos, transposedPos,
nextLetters, nextLettersSize);
}
}
@ -352,10 +354,10 @@ static inline int capped255MultForFullMatchAccentsOrCapitalizationDifference(con
return (num < TWO_31ST_DIV_255 ? 255 * num : S_INT_MAX);
}
inline int UnigramDictionary::calculateFinalFreq(const int inputIndex, const int depth,
const int snr, const int skipPos, const int excessivePos, const int transposedPos,
const int matchWeight, const int skipPos, const int excessivePos, const int transposedPos,
const int freq, const bool sameLength) {
// TODO: Demote by edit distance
int finalFreq = freq * snr;
int finalFreq = freq * matchWeight;
if (skipPos >= 0) multiplyRate(WORDS_WITH_MISSING_CHARACTER_DEMOTION_RATE, &finalFreq);
if (transposedPos >= 0) multiplyRate(
WORDS_WITH_TRANSPOSED_CHARACTERS_DEMOTION_RATE, &finalFreq);
@ -367,7 +369,7 @@ inline int UnigramDictionary::calculateFinalFreq(const int inputIndex, const int
}
int lengthFreq = TYPED_LETTER_MULTIPLIER;
for (int i = 0; i < depth; ++i) lengthFreq *= TYPED_LETTER_MULTIPLIER;
if (lengthFreq == snr) {
if (lengthFreq == matchWeight) {
if (depth > 1) {
if (DEBUG_DICT) LOGI("Found full matched word.");
multiplyRate(FULL_MATCHED_WORDS_PROMOTION_RATE, &finalFreq);
@ -381,10 +383,10 @@ inline int UnigramDictionary::calculateFinalFreq(const int inputIndex, const int
}
inline void UnigramDictionary::onTerminalWhenUserTypedLengthIsGreaterThanInputLength(
unsigned short *word, const int inputIndex, const int depth, const int snr,
unsigned short *word, const int inputIndex, const int depth, const int matchWeight,
int *nextLetters, const int nextLettersSize, const int skipPos, const int excessivePos,
const int transposedPos, const int freq) {
const int finalFreq = calculateFinalFreq(inputIndex, depth, snr, skipPos, excessivePos,
const int finalFreq = calculateFinalFreq(inputIndex, depth, matchWeight, skipPos, excessivePos,
transposedPos, freq, false);
if (depth >= MIN_SUGGEST_DEPTH) addWord(word, depth + 1, finalFreq);
if (depth >= mInputLength && skipPos < 0) {
@ -393,10 +395,10 @@ inline void UnigramDictionary::onTerminalWhenUserTypedLengthIsGreaterThanInputLe
}
inline void UnigramDictionary::onTerminalWhenUserTypedLengthIsSameAsInputLength(
unsigned short *word, const int inputIndex, const int depth, const int snr,
unsigned short *word, const int inputIndex, const int depth, const int matchWeight,
const int skipPos, const int excessivePos, const int transposedPos, const int freq) {
if (sameAsTyped(word, depth + 1)) return;
const int finalFreq = calculateFinalFreq(inputIndex, depth, snr, skipPos,
const int finalFreq = calculateFinalFreq(inputIndex, depth, matchWeight, skipPos,
excessivePos, transposedPos, freq, true);
// Proximity collection will promote a word of the same length as what user typed.
if (depth >= MIN_SUGGEST_DEPTH) addWord(word, depth + 1, finalFreq);
@ -446,11 +448,11 @@ inline bool UnigramDictionary::existsAdjacentProximityChars(const int inputIndex
inline UnigramDictionary::ProximityType UnigramDictionary::getMatchedProximityId(
const int *currentChars, const unsigned short c, const int skipPos,
const int excessivePos, const int transposedPos) {
const unsigned short lowerC = toLowerCase(c);
const unsigned short baseLowerC = toBaseLowerCase(c);
// The first char in the array is what user typed. If it matches right away,
// that means the user typed that same char for this pos.
if (currentChars[0] == lowerC || currentChars[0] == c)
if (currentChars[0] == baseLowerC || currentChars[0] == c)
return SAME_OR_ACCENTED_OR_CAPITALIZED_CHAR;
// If one of those is true, we should not check for close characters at all.
@ -460,13 +462,13 @@ inline UnigramDictionary::ProximityType UnigramDictionary::getMatchedProximityId
// If the non-accented, lowercased version of that first character matches c,
// then we have a non-accented version of the accented character the user
// typed. Treat it as a close char.
if (toLowerCase(currentChars[0]) == lowerC)
if (toBaseLowerCase(currentChars[0]) == baseLowerC)
return NEAR_PROXIMITY_CHAR;
// Not an exact nor an accent-alike match: search the list of close keys
int j = 1;
while (currentChars[j] > 0 && j < MAX_PROXIMITY_CHARS) {
const bool matched = (currentChars[j] == lowerC || currentChars[j] == c);
const bool matched = (currentChars[j] == baseLowerC || currentChars[j] == c);
if (matched) return NEAR_PROXIMITY_CHAR;
++j;
}
@ -476,10 +478,10 @@ inline UnigramDictionary::ProximityType UnigramDictionary::getMatchedProximityId
}
inline bool UnigramDictionary::processCurrentNode(const int pos, const int depth,
const int maxDepth, const bool traverseAllNodes, int snr, int inputIndex,
const int maxDepth, const bool traverseAllNodes, int matchWeight, int inputIndex,
const int diffs, const int skipPos, const int excessivePos, const int transposedPos,
int *nextLetters, const int nextLettersSize, int *newCount, int *newChildPosition,
bool *newTraverseAllNodes, int *newSnr, int*newInputIndex, int *newDiffs,
bool *newTraverseAllNodes, int *newMatchRate, int *newInputIndex, int *newDiffs,
int *nextSiblingPosition) {
if (DEBUG_DICT) {
int inputCount = 0;
@ -506,11 +508,12 @@ inline bool UnigramDictionary::processCurrentNode(const int pos, const int depth
mWord[depth] = c;
if (traverseAllNodes && terminal) {
onTerminalWhenUserTypedLengthIsGreaterThanInputLength(mWord, inputIndex, depth,
snr, nextLetters, nextLettersSize, skipPos, excessivePos, transposedPos, freq);
matchWeight, nextLetters, nextLettersSize, skipPos, excessivePos, transposedPos,
freq);
}
if (!needsToTraverseChildrenNodes) return false;
*newTraverseAllNodes = traverseAllNodes;
*newSnr = snr;
*newMatchRate = matchWeight;
*newDiffs = diffs;
*newInputIndex = inputIndex;
} else {
@ -528,18 +531,18 @@ inline bool UnigramDictionary::processCurrentNode(const int pos, const int depth
// If inputIndex is greater than mInputLength, that means there is no
// proximity chars. So, we don't need to check proximity.
if (SAME_OR_ACCENTED_OR_CAPITALIZED_CHAR == matchedProximityCharId) {
snr = snr * TYPED_LETTER_MULTIPLIER;
matchWeight = matchWeight * TYPED_LETTER_MULTIPLIER;
}
bool isSameAsUserTypedLength = mInputLength == inputIndex + 1
|| (excessivePos == mInputLength - 1 && inputIndex == mInputLength - 2);
if (isSameAsUserTypedLength && terminal) {
onTerminalWhenUserTypedLengthIsSameAsInputLength(mWord, inputIndex, depth, snr,
onTerminalWhenUserTypedLengthIsSameAsInputLength(mWord, inputIndex, depth, matchWeight,
skipPos, excessivePos, transposedPos, freq);
}
if (!needsToTraverseChildrenNodes) return false;
// Start traversing all nodes after the index exceeds the user typed length
*newTraverseAllNodes = isSameAsUserTypedLength;
*newSnr = snr;
*newMatchRate = matchWeight;
*newDiffs = diffs + ((NEAR_PROXIMITY_CHAR == matchedProximityCharId) ? 1 : 0);
*newInputIndex = inputIndex + 1;
}
@ -623,8 +626,8 @@ inline bool UnigramDictionary::processCurrentNodeForExactMatch(const int firstCh
newChildPosition, newTerminal, newFreq);
const unsigned int inputC = currentChars[0];
if (DEBUG_DICT) assert(inputC <= U_SHORT_MAX);
const unsigned short lowerC = toLowerCase(c);
const bool matched = (inputC == lowerC || inputC == c);
const unsigned short baseLowerC = toBaseLowerCase(c);
const bool matched = (inputC == baseLowerC || inputC == c);
const bool hasChild = *newChildPosition != 0;
if (matched) {
word[depth] = c;

2
native/src/unigram_dictionary.h
View File

@ -47,7 +47,7 @@ private:
int wideStrLen(unsigned short *str);
bool sameAsTyped(unsigned short *word, int length);
bool addWord(unsigned short *word, int length, int frequency);
unsigned short toLowerCase(unsigned short c);
unsigned short toBaseLowerCase(unsigned short c);
void getWordsRec(const int childrenCount, const int pos, const int depth, const int maxDepth,
const bool traverseAllNodes, const int snr, const int inputIndex, const int diffs,
const int skipPos, const int excessivePos, const int transposedPos, int *nextLetters,