bool checkKanaStringsEqual(const UChar* firstData, unsigned firstLength, const UChar* secondData, unsigned secondLength)
{
const UChar* a = firstData;
const UChar* aEnd = firstData + firstLength;
const UChar* b = secondData;
const UChar* bEnd = secondData + secondLength;
while (true) {
// Check for non-kana-letter characters.
while (a != aEnd && !isKanaLetter(*a) && b != bEnd && !isKanaLetter(*b)) {
if (*a++ != *b++)
return false;
}
// If we reached the end of either the target or the match, we should have
// reached the end of both; both should have the same number of kana letters.
if (a == aEnd || b == bEnd) {
return a == aEnd && b == bEnd;
}
if (isKanaLetter(*a) != isKanaLetter(*b))
return false;
// Check that single Kana letters in |a| and |b| are the same.
const size_t offset = compareKanaLetterAndComposedVoicedSoundMarks(a, aEnd, b, bEnd);
if (offset == kNotFound)
return false;
// Update values of |a| and |b| after comparing.
a += offset;
b += offset;
}
}
bool checkOnlyKanaLettersInStrings(const UChar* firstData, unsigned firstLength, const UChar* secondData, unsigned secondLength)
{
const UChar* a = firstData;
const UChar* aEnd = firstData + firstLength;
const UChar* b = secondData;
const UChar* bEnd = secondData + secondLength;
while (true) {
// Skip runs of non-kana-letter characters. This is necessary so we can
// correctly handle strings where the |firstData| and |secondData| have different-length
// runs of characters that match, while still double checking the correctness
// of matches of kana letters with other kana letters.
while (a != aEnd && !isKanaLetter(*a))
++a;
while (b != bEnd && !isKanaLetter(*b))
++b;
// If we reached the end of either the target or the match, we should have
// reached the end of both; both should have the same number of kana letters.
if (a == aEnd || b == bEnd) {
return a == aEnd && b == bEnd;
}
// Check that single Kana letters in |a| and |b| are the same.
const size_t offset = compareKanaLetterAndComposedVoicedSoundMarks(a, aEnd, b, bEnd);
if (offset == kNotFound)
return false;
// Update values of |a| and |b| after comparing.
a += offset;
b += offset;
}
}
bool containsKanaLetters(const String& pattern) {
const unsigned length = pattern.length();
for (unsigned i = 0; i < length; ++i) {
if (isKanaLetter(pattern[i]))
return true;
}
return false;
}
bool isSmallKanaLetter(UChar character)
{
ASSERT(isKanaLetter(character));
switch (character) {
case 0x3041: // HIRAGANA LETTER SMALL A
case 0x3043: // HIRAGANA LETTER SMALL I
case 0x3045: // HIRAGANA LETTER SMALL U
case 0x3047: // HIRAGANA LETTER SMALL E
case 0x3049: // HIRAGANA LETTER SMALL O
case 0x3063: // HIRAGANA LETTER SMALL TU
case 0x3083: // HIRAGANA LETTER SMALL YA
case 0x3085: // HIRAGANA LETTER SMALL YU
case 0x3087: // HIRAGANA LETTER SMALL YO
case 0x308E: // HIRAGANA LETTER SMALL WA
case 0x3095: // HIRAGANA LETTER SMALL KA
case 0x3096: // HIRAGANA LETTER SMALL KE
case 0x30A1: // KATAKANA LETTER SMALL A
case 0x30A3: // KATAKANA LETTER SMALL I
case 0x30A5: // KATAKANA LETTER SMALL U
case 0x30A7: // KATAKANA LETTER SMALL E
case 0x30A9: // KATAKANA LETTER SMALL O
case 0x30C3: // KATAKANA LETTER SMALL TU
case 0x30E3: // KATAKANA LETTER SMALL YA
case 0x30E5: // KATAKANA LETTER SMALL YU
case 0x30E7: // KATAKANA LETTER SMALL YO
case 0x30EE: // KATAKANA LETTER SMALL WA
case 0x30F5: // KATAKANA LETTER SMALL KA
case 0x30F6: // KATAKANA LETTER SMALL KE
case 0x31F0: // KATAKANA LETTER SMALL KU
case 0x31F1: // KATAKANA LETTER SMALL SI
case 0x31F2: // KATAKANA LETTER SMALL SU
case 0x31F3: // KATAKANA LETTER SMALL TO
case 0x31F4: // KATAKANA LETTER SMALL NU
case 0x31F5: // KATAKANA LETTER SMALL HA
case 0x31F6: // KATAKANA LETTER SMALL HI
case 0x31F7: // KATAKANA LETTER SMALL HU
case 0x31F8: // KATAKANA LETTER SMALL HE
case 0x31F9: // KATAKANA LETTER SMALL HO
case 0x31FA: // KATAKANA LETTER SMALL MU
case 0x31FB: // KATAKANA LETTER SMALL RA
case 0x31FC: // KATAKANA LETTER SMALL RI
case 0x31FD: // KATAKANA LETTER SMALL RU
case 0x31FE: // KATAKANA LETTER SMALL RE
case 0x31FF: // KATAKANA LETTER SMALL RO
case 0xFF67: // HALFWIDTH KATAKANA LETTER SMALL A
case 0xFF68: // HALFWIDTH KATAKANA LETTER SMALL I
case 0xFF69: // HALFWIDTH KATAKANA LETTER SMALL U
case 0xFF6A: // HALFWIDTH KATAKANA LETTER SMALL E
case 0xFF6B: // HALFWIDTH KATAKANA LETTER SMALL O
case 0xFF6C: // HALFWIDTH KATAKANA LETTER SMALL YA
case 0xFF6D: // HALFWIDTH KATAKANA LETTER SMALL YU
case 0xFF6E: // HALFWIDTH KATAKANA LETTER SMALL YO
case 0xFF6F: // HALFWIDTH KATAKANA LETTER SMALL TU
return true;
}
return false;
}
static inline VoicedSoundMarkType composedVoicedSoundMark(UChar character)
{
ASSERT(isKanaLetter(character));
switch (character) {
case 0x304C: // HIRAGANA LETTER GA
case 0x304E: // HIRAGANA LETTER GI
case 0x3050: // HIRAGANA LETTER GU
case 0x3052: // HIRAGANA LETTER GE
case 0x3054: // HIRAGANA LETTER GO
case 0x3056: // HIRAGANA LETTER ZA
case 0x3058: // HIRAGANA LETTER ZI
case 0x305A: // HIRAGANA LETTER ZU
case 0x305C: // HIRAGANA LETTER ZE
case 0x305E: // HIRAGANA LETTER ZO
case 0x3060: // HIRAGANA LETTER DA
case 0x3062: // HIRAGANA LETTER DI
case 0x3065: // HIRAGANA LETTER DU
case 0x3067: // HIRAGANA LETTER DE
case 0x3069: // HIRAGANA LETTER DO
case 0x3070: // HIRAGANA LETTER BA
case 0x3073: // HIRAGANA LETTER BI
case 0x3076: // HIRAGANA LETTER BU
case 0x3079: // HIRAGANA LETTER BE
case 0x307C: // HIRAGANA LETTER BO
case 0x3094: // HIRAGANA LETTER VU
case 0x30AC: // KATAKANA LETTER GA
case 0x30AE: // KATAKANA LETTER GI
case 0x30B0: // KATAKANA LETTER GU
case 0x30B2: // KATAKANA LETTER GE
case 0x30B4: // KATAKANA LETTER GO
case 0x30B6: // KATAKANA LETTER ZA
case 0x30B8: // KATAKANA LETTER ZI
case 0x30BA: // KATAKANA LETTER ZU
case 0x30BC: // KATAKANA LETTER ZE
case 0x30BE: // KATAKANA LETTER ZO
case 0x30C0: // KATAKANA LETTER DA
case 0x30C2: // KATAKANA LETTER DI
case 0x30C5: // KATAKANA LETTER DU
case 0x30C7: // KATAKANA LETTER DE
case 0x30C9: // KATAKANA LETTER DO
case 0x30D0: // KATAKANA LETTER BA
case 0x30D3: // KATAKANA LETTER BI
case 0x30D6: // KATAKANA LETTER BU
case 0x30D9: // KATAKANA LETTER BE
case 0x30DC: // KATAKANA LETTER BO
case 0x30F4: // KATAKANA LETTER VU
case 0x30F7: // KATAKANA LETTER VA
case 0x30F8: // KATAKANA LETTER VI
case 0x30F9: // KATAKANA LETTER VE
case 0x30FA: // KATAKANA LETTER VO
return VoicedSoundMark;
case 0x3071: // HIRAGANA LETTER PA
case 0x3074: // HIRAGANA LETTER PI
case 0x3077: // HIRAGANA LETTER PU
case 0x307A: // HIRAGANA LETTER PE
case 0x307D: // HIRAGANA LETTER PO
case 0x30D1: // KATAKANA LETTER PA
case 0x30D4: // KATAKANA LETTER PI
case 0x30D7: // KATAKANA LETTER PU
case 0x30DA: // KATAKANA LETTER PE
case 0x30DD: // KATAKANA LETTER PO
return SemiVoicedSoundMark;
}
return NoVoicedSoundMark;
}
