1 files changed, 68 insertions, 0 deletions
diff --git a/core/fpdftext/unicodenormalization.cpp b/core/fpdftext/unicodenormalization.cpp
new file mode 100644
index 0000000000..6ede1365c4
--- /dev/null
+++ b/core/fpdftext/unicodenormalization.cpp
@@ -0,0 +1,68 @@
+// 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;
+}