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Bug 1157277 - Part 2: Add functions to handle non-BMP ToLowerCase/ToUpperCase. r=till

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This commit is contained in:
Tooru Fujisawa 2016-07-20 14:11:35 +09:00
parent eaf8e288e1
commit 8f916449f4
1 changed files with 44 additions and 0 deletions
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44
js/src/vm/Unicode.h
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@ -235,6 +235,50 @@ CanLowerCase(char16_t ch)
return CharInfo(ch).lowerCase != 0;
}
#define CHECK_RANGE(FROM, TO, LEAD, TRAIL_FROM, TRAIL_TO, DIFF) \
if (lead == LEAD && trail >= TRAIL_FROM && trail <= TRAIL_TO) \
return true;
inline bool
CanUpperCaseNonBMP(char16_t lead, char16_t trail)
{
FOR_EACH_NON_BMP_UPPERCASE(CHECK_RANGE)
return false;
}
inline bool
CanLowerCaseNonBMP(char16_t lead, char16_t trail)
{
FOR_EACH_NON_BMP_LOWERCASE(CHECK_RANGE)
return false;
}
#undef CHECK_RANGE
inline char16_t
ToUpperCaseNonBMPTrail(char16_t lead, char16_t trail)
{
#define CALC_TRAIL(FROM, TO, LEAD, TRAIL_FROM, TRAIL_TO, DIFF) \
if (lead == LEAD && trail >= TRAIL_FROM && trail <= TRAIL_TO) \
return trail + DIFF;
FOR_EACH_NON_BMP_UPPERCASE(CALC_TRAIL)
#undef CALL_TRAIL
return trail;
}
inline char16_t
ToLowerCaseNonBMPTrail(char16_t lead, char16_t trail)
{
#define CALC_TRAIL(FROM, TO, LEAD, TRAIL_FROM, TRAIL_TO, DIFF) \
if (lead == LEAD && trail >= TRAIL_FROM && trail <= TRAIL_TO) \
return trail + DIFF;
FOR_EACH_NON_BMP_LOWERCASE(CALC_TRAIL)
#undef CALL_TRAIL
return trail;
}
class FoldingInfo {
public:
uint16_t folding;