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// Scintilla source code edit control
/** @file CaseFolder.cxx
** Classes for case folding.
**/
// Copyright 1998-2013 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <stdexcept>
#include <vector>
#include <algorithm>
#include "CharacterType.h"
#include "CaseFolder.h"
#include "CaseConvert.h"
using namespace Scintilla::Internal;
namespace {
constexpr unsigned char IndexFromChar(char ch) {
return static_cast<unsigned char>(ch);
}
}
CaseFolderTable::CaseFolderTable() noexcept : mapping{} {
StandardASCII();
}
size_t CaseFolderTable::Fold(char *folded, size_t sizeFolded, const char *mixed, size_t lenMixed) {
if (lenMixed > sizeFolded) {
return 0;
}
for (size_t i=0; i<lenMixed; i++) {
folded[i] = mapping[IndexFromChar(mixed[i])];
}
return lenMixed;
}
void CaseFolderTable::SetTranslation(char ch, char chTranslation) noexcept {
mapping[IndexFromChar(ch)] = chTranslation;
}
void CaseFolderTable::StandardASCII() noexcept {
for (size_t iChar=0; iChar<std::size(mapping); iChar++) {
mapping[iChar] = static_cast<char>(MakeLowerCase(iChar));
}
}
CaseFolderUnicode::CaseFolderUnicode() {
converter = ConverterFor(CaseConversion::fold);
}
size_t CaseFolderUnicode::Fold(char *folded, size_t sizeFolded, const char *mixed, size_t lenMixed) {
if ((lenMixed == 1) && (sizeFolded > 0)) {
folded[0] = mapping[IndexFromChar(mixed[0])];
return 1;
} else {
return converter->CaseConvertString(folded, sizeFolded, mixed, lenMixed);
}
}
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