ext/scintilla/src/CaseFolder.cxx

   1 // Scintilla source code edit control
   2 /** @file CaseFolder.cxx
   3  ** Classes for case folding.
   4  **/
   5 // Copyright 1998-2013 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 #include <stdexcept>
   9 #include <vector>
  10 #include <algorithm>
  11
  12 #include "CaseFolder.h"
  13 #include "CaseConvert.h"
  14 #include "UniConversion.h"
  15
  16 #ifdef SCI_NAMESPACE
  17 using namespace Scintilla;
  18 #endif
  19
  20 CaseFolder::~CaseFolder() {
  21 }
  22
  23 CaseFolderTable::CaseFolderTable() {
  24         for (size_t iChar=0; iChar<sizeof(mapping); iChar++) {
  25                 mapping[iChar] = static_cast<char>(iChar);
  26         }
  27 }
  28
  29 CaseFolderTable::~CaseFolderTable() {
  30 }
  31
  32 size_t CaseFolderTable::Fold(char *folded, size_t sizeFolded, const char *mixed, size_t lenMixed) {
  33         if (lenMixed > sizeFolded) {
  34                 return 0;
  35         } else {
  36                 for (size_t i=0; i<lenMixed; i++) {
  37                         folded[i] = mapping[static_cast<unsigned char>(mixed[i])];
  38                 }
  39                 return lenMixed;
  40         }
  41 }
  42
  43 void CaseFolderTable::SetTranslation(char ch, char chTranslation) {
  44         mapping[static_cast<unsigned char>(ch)] = chTranslation;
  45 }
  46
  47 void CaseFolderTable::StandardASCII() {
  48         for (size_t iChar=0; iChar<sizeof(mapping); iChar++) {
  49                 if (iChar >= 'A' && iChar <= 'Z') {
  50                         mapping[iChar] = static_cast<char>(iChar - 'A' + 'a');
  51                 } else {
  52                         mapping[iChar] = static_cast<char>(iChar);
  53                 }
  54         }
  55 }
  56
  57 CaseFolderUnicode::CaseFolderUnicode() {
  58         StandardASCII();
  59         converter = ConverterFor(CaseConversionFold);
  60 }
  61
  62 size_t CaseFolderUnicode::Fold(char *folded, size_t sizeFolded, const char *mixed, size_t lenMixed) {
  63         if ((lenMixed == 1) && (sizeFolded > 0)) {
  64                 folded[0] = mapping[static_cast<unsigned char>(mixed[0])];
  65                 return 1;
  66         } else {
  67                 return converter->CaseConvertString(folded, sizeFolded, mixed, lenMixed);
  68         }
  69 }