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