1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "core/include/fxcrt/fx_string.h"
8 #include "unicodenormalizationdata.h"
9
10 const FX_WCHAR* const g_UnicodeData_Normalization_Maps[5] = {
11 nullptr,
12 g_UnicodeData_Normalization_Map1,
13 g_UnicodeData_Normalization_Map2,
14 g_UnicodeData_Normalization_Map3,
15 g_UnicodeData_Normalization_Map4};
16
FX_Unicode_GetNormalization(FX_WCHAR wch,FX_WCHAR * pDst)17 FX_STRSIZE FX_Unicode_GetNormalization(FX_WCHAR wch, FX_WCHAR* pDst) {
18 wch = wch & 0xFFFF;
19 FX_WCHAR wFind = g_UnicodeData_Normalization[wch];
20 if (!wFind) {
21 if (pDst) {
22 *pDst = wch;
23 }
24 return 1;
25 }
26 if (wFind >= 0x8000) {
27 wch = wFind - 0x8000;
28 wFind = 1;
29 } else {
30 wch = wFind & 0x0FFF;
31 wFind >>= 12;
32 }
33 const FX_WCHAR* pMap = g_UnicodeData_Normalization_Maps[wFind];
34 if (pMap == g_UnicodeData_Normalization_Map4) {
35 pMap = g_UnicodeData_Normalization_Map4 + wch;
36 wFind = (FX_WCHAR)(*pMap++);
37 } else {
38 pMap += wch;
39 }
40 if (pDst) {
41 FX_WCHAR n = wFind;
42 while (n--) {
43 *pDst++ = *pMap++;
44 }
45 }
46 return (FX_STRSIZE)wFind;
47 }
FX_WideString_GetNormalization(const CFX_WideStringC & wsSrc,FX_WCHAR * pDst)48 FX_STRSIZE FX_WideString_GetNormalization(const CFX_WideStringC& wsSrc,
49 FX_WCHAR* pDst) {
50 FX_STRSIZE nCount = 0;
51 for (FX_STRSIZE len = 0; len < wsSrc.GetLength(); len++) {
52 FX_WCHAR wch = wsSrc.GetAt(len);
53 if (pDst) {
54 nCount += FX_Unicode_GetNormalization(wch, pDst + nCount);
55 } else {
56 nCount += FX_Unicode_GetNormalization(wch, pDst);
57 }
58 }
59 return nCount;
60 }
FX_WideString_GetNormalization(const CFX_WideStringC & wsSrc,CFX_WideString & wsDst)61 FX_STRSIZE FX_WideString_GetNormalization(const CFX_WideStringC& wsSrc,
62 CFX_WideString& wsDst) {
63 FX_STRSIZE nLen = FX_WideString_GetNormalization(wsSrc, (FX_WCHAR*)NULL);
64 if (!nLen) {
65 return 0;
66 }
67 FX_WCHAR* pBuf = wsDst.GetBuffer(nLen);
68 FX_WideString_GetNormalization(wsSrc, pBuf);
69 wsDst.ReleaseBuffer(nLen);
70 return nLen;
71 }
72