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ICU-5588 Add logic to limit the size of an Indic syllable to a preset maximum

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X-SVN-Rev: 26774
This commit is contained in:
John Emmons 2009-10-08 19:13:13 +00:00
parent d54bef2490
commit d2fffdf749
1 changed files with 12 additions and 0 deletions
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12
icu4c/source/layout/IndicReordering.cpp
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@ -82,6 +82,10 @@ U_NAMESPACE_BEGIN
#define C_DOTTED_CIRCLE 0x25CC
#define NO_GLYPH 0xFFFF
// Some level of debate as to the proper value for MAX_CONSONANTS_PER_SYLLABLE. Ticket 5588 states that 4
// is the magic number according to ISCII, but 5 seems to be the more consistent with XP.
#define MAX_CONSONANTS_PER_SYLLABLE 5
#define INDIC_BLOCK_SIZE 0x7F
class IndicReorderingOutput : public UMemory {
@ -594,9 +598,17 @@ le_int32 IndicReordering::findSyllable(const IndicClassTable *classTable, const
{
le_int32 cursor = prev;
le_int8 state = 0;
le_int8 consonant_count = 0;
while (cursor < charCount) {
IndicClassTable::CharClass charClass = classTable->getCharClass(chars[cursor]);
if ( IndicClassTable::isConsonant(charClass) ) {
consonant_count++;
if ( consonant_count > MAX_CONSONANTS_PER_SYLLABLE ) {
break;
}
}
state = stateTable[state][charClass & CF_CLASS_MASK];