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
~CaseFolder()17 CaseFolder::~CaseFolder() {
18 }
19
CaseFolderTable()20 CaseFolderTable::CaseFolderTable() noexcept : mapping{} {
21 for (size_t iChar=0; iChar<sizeof(mapping); iChar++) {
22 mapping[iChar] = static_cast<char>(iChar);
23 }
24 }
25
~CaseFolderTable()26 CaseFolderTable::~CaseFolderTable() {
27 }
28
Fold(char * folded,size_t sizeFolded,const char * mixed,size_t lenMixed)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
SetTranslation(char ch,char chTranslation)40 void CaseFolderTable::SetTranslation(char ch, char chTranslation) noexcept {
41 mapping[static_cast<unsigned char>(ch)] = chTranslation;
42 }
43
StandardASCII()44 void CaseFolderTable::StandardASCII() noexcept {
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
CaseFolderUnicode()54 CaseFolderUnicode::CaseFolderUnicode() {
55 StandardASCII();
56 converter = ConverterFor(CaseConversionFold);
57 }
58
Fold(char * folded,size_t sizeFolded,const char * mixed,size_t lenMixed)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 }
67