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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fpdftext/unicodenormalizationdata.h"
#include "core/include/fxcrt/fx_string.h"
const FX_WCHAR* const g_UnicodeData_Normalization_Maps[5] = {
nullptr, g_UnicodeData_Normalization_Map1, g_UnicodeData_Normalization_Map2,
g_UnicodeData_Normalization_Map3, g_UnicodeData_Normalization_Map4};
FX_STRSIZE FX_Unicode_GetNormalization(FX_WCHAR wch, FX_WCHAR* pDst) {
wch = wch & 0xFFFF;
FX_WCHAR wFind = g_UnicodeData_Normalization[wch];
if (!wFind) {
if (pDst) {
*pDst = wch;
}
return 1;
}
if (wFind >= 0x8000) {
wch = wFind - 0x8000;
wFind = 1;
} else {
wch = wFind & 0x0FFF;
wFind >>= 12;
}
const FX_WCHAR* pMap = g_UnicodeData_Normalization_Maps[wFind];
if (pMap == g_UnicodeData_Normalization_Map4) {
pMap = g_UnicodeData_Normalization_Map4 + wch;
wFind = (FX_WCHAR)(*pMap++);
} else {
pMap += wch;
}
if (pDst) {
FX_WCHAR n = wFind;
while (n--) {
*pDst++ = *pMap++;
}
}
return (FX_STRSIZE)wFind;
}
FX_STRSIZE FX_WideString_GetNormalization(const CFX_WideStringC& wsSrc,
FX_WCHAR* pDst) {
FX_STRSIZE nCount = 0;
for (FX_STRSIZE len = 0; len < wsSrc.GetLength(); len++) {
FX_WCHAR wch = wsSrc.GetAt(len);
if (pDst) {
nCount += FX_Unicode_GetNormalization(wch, pDst + nCount);
} else {
nCount += FX_Unicode_GetNormalization(wch, pDst);
}
}
return nCount;
}
FX_STRSIZE FX_WideString_GetNormalization(const CFX_WideStringC& wsSrc,
CFX_WideString& wsDst) {
FX_STRSIZE nLen = FX_WideString_GetNormalization(wsSrc, (FX_WCHAR*)NULL);
if (!nLen) {
return 0;
}
FX_WCHAR* pBuf = wsDst.GetBuffer(nLen);
FX_WideString_GetNormalization(wsSrc, pBuf);
wsDst.ReleaseBuffer(nLen);
return nLen;
}
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