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Fix for #2185627 : ArrayIndexOutOfBounds in BinaryDictionary.getWords()

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Make sure the word count doesn't exceed the maximum suggested words.

And also, only get the count one time instead of every time a match
is found.
This commit is contained in:
Amith Yamasani 2009-10-14 16:10:32 -07:00
parent dd8c1d8db3
commit d0e43ecb34
2 changed files with 6 additions and 7 deletions
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12
dictionary/src/dictionary.cpp
View file

@ -51,6 +51,7 @@ Dictionary::~Dictionary()
int Dictionary::getSuggestions(int *codes, int codesSize, unsigned short *outWords, int *frequencies,
int maxWordLength, int maxWords, int maxAlternatives, int skipPos)
{
int suggWords;
mFrequencies = frequencies;
mOutputChars = outWords;
mInputCodes = codes;
@ -58,14 +59,16 @@ int Dictionary::getSuggestions(int *codes, int codesSize, unsigned short *outWor
mMaxAlternatives = maxAlternatives;
mMaxWordLength = maxWordLength;
mMaxWords = maxWords;
mWords = 0;
mSkipPos = skipPos;
mMaxEditDistance = mInputLength < 5 ? 2 : mInputLength / 2;
getWordsRec(0, 0, mInputLength * 3, false, 1, 0, 0);
if (DEBUG_DICT) LOGI("Returning %d words", mWords);
return mWords;
// Get the word count
suggWords = 0;
while (suggWords < mMaxWords && mFrequencies[suggWords] > 0) suggWords++;
if (DEBUG_DICT) LOGI("Returning %d words", suggWords);
return suggWords;
}
unsigned short
@ -138,9 +141,6 @@ Dictionary::addWord(unsigned short *word, int length, int frequency)
*dest++ = *word++;
}
*dest = 0; // NULL terminate
// Update the word count
mWords = 0;
while (mFrequencies[mWords] > 0) mWords++;
if (DEBUG_DICT) LOGI("Added word at %d\n", insertAt);
return true;
}

1
dictionary/src/dictionary.h
View file

@ -60,7 +60,6 @@ private:
int *mFrequencies;
int mMaxWords;
int mMaxWordLength;
int mWords;
unsigned short *mOutputChars;
int *mInputCodes;
int mInputLength;