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 <vector>
   9 #include <algorithm>
  10
  11 #include "CaseFolder.h"
  12 #include "CaseConvert.h"
  13 #include "UniConversion.h"
  14
  15 #ifdef SCI_NAMESPACE
  16 using namespace Scintilla;
  17 #endif
  18
  19 CaseFolder::~CaseFolder() {
  20 }
  21
  22 CaseFolderTable::CaseFolderTable() {
  23         for (size_t iChar=0; iChar<sizeof(mapping); iChar++) {
  24                 mapping[iChar] = static_cast<char>(iChar);
  25         }
  26 }
  27
  28 CaseFolderTable::~CaseFolderTable() {
  29 }
  30
  31 size_t CaseFolderTable::Fold(char *folded, size_t sizeFolded, const char *mixed, size_t lenMixed) {
  32         if (lenMixed > sizeFolded) {
  33                 return 0;
  34         } else {
  35                 for (size_t i=0; i<lenMixed; i++) {
  36                         folded[i] = mapping[static_cast<unsigned char>(mixed[i])];
  37                 }
  38                 return lenMixed;
  39         }
  40 }
  41
  42 void CaseFolderTable::SetTranslation(char ch, char chTranslation) {
  43         mapping[static_cast<unsigned char>(ch)] = chTranslation;
  44 }
  45
  46 void CaseFolderTable::StandardASCII() {
  47         for (size_t iChar=0; iChar<sizeof(mapping); iChar++) {
  48                 if (iChar >= 'A' && iChar <= 'Z') {
  49                         mapping[iChar] = static_cast<char>(iChar - 'A' + 'a');
  50                 } else {
  51                         mapping[iChar] = static_cast<char>(iChar);
  52                 }
  53         }
  54 }
  55
  56 CaseFolderUnicode::CaseFolderUnicode() {
  57         StandardASCII();
  58         converter = ConverterFor(CaseConversionFold);
  59 }
  60
  61 size_t CaseFolderUnicode::Fold(char *folded, size_t sizeFolded, const char *mixed, size_t lenMixed) {
  62         if ((lenMixed == 1) && (sizeFolded > 0)) {
  63                 folded[0] = mapping[static_cast<unsigned char>(mixed[0])];
  64                 return 1;
  65         } else {
  66                 return converter->CaseConvertString(folded, sizeFolded, mixed, lenMixed);
  67         }
  68 }