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