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opt: simplify Folding::apply
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shenleban tongying 2024-11-12 22:06:27 -05:00
parent 20fcea33e1
commit fbec70e41a
1 changed files with 15 additions and 33 deletions
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42
src/common/folding.cc
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@ -20,41 +20,23 @@ bool isCombiningMark( wchar ch )
wstring apply( wstring const & in, bool preserveWildcards ) wstring apply( wstring const & in, bool preserveWildcards )
{ {
//remove space and accent; // remove diacritics (normalization), white space, punt,
auto withPunc = QString::fromStdU32String( in ) auto temp = QString::fromStdU32String( in )
.normalized( QString::NormalizationForm_KD ) .normalized( QString::NormalizationForm_KD )
.remove( RX::markSpace ) .remove( RX::markSpace )
.removeIf( [ preserveWildcards ]( const QChar & ch ) -> bool {
return ch.isPunct()
&& !( preserveWildcards && ( ch == '\\' || ch == '?' || ch == '*' || ch == '[' || ch == ']' ) );
} )
.toStdU32String(); .toStdU32String();
// case folding
//First, strip diacritics and apply ws/punctuation removal std::u32string caseFolded;
wstring withoutDiacritics; caseFolded.reserve( temp.size() );
withoutDiacritics.reserve( withPunc.size() );
for ( auto const & ch : withPunc ) {
if ( !isPunct( ch )
|| ( preserveWildcards && ( ch == '\\' || ch == '?' || ch == '*' || ch == '[' || ch == ']' ) ) ) {
withoutDiacritics.push_back( ch );
}
}
// Now, fold the case
wstring caseFolded;
caseFolded.reserve( withoutDiacritics.size() * foldCaseMaxOut );
wchar const * nextChar = withoutDiacritics.data();
wchar buf[ foldCaseMaxOut ]; wchar buf[ foldCaseMaxOut ];
for ( const char32_t ch : temp ) {
for ( size_t left = withoutDiacritics.size(); left--; ) { auto n = foldCase( ch, buf );
caseFolded.append( buf, foldCase( *nextChar++, buf ) ); caseFolded.append( buf, n );
} }
return caseFolded; return caseFolded;
} }