1 files changed, 51 insertions, 0 deletions
diff --git a/core/fxcrt/cfx_chariter.cpp b/core/fxcrt/cfx_chariter.cpp
new file mode 100644
index 0000000000..c14db2f322
--- /dev/null
+++ b/core/fxcrt/cfx_chariter.cpp
@@ -0,0 +1,51 @@
+// Copyright 2016 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/fxcrt/cfx_chariter.h"
+
+CFX_CharIter::CFX_CharIter(const CFX_WideString& wsText)
+    : m_wsText(wsText), m_nIndex(0) {
+  ASSERT(!wsText.IsEmpty());
+}
+
+CFX_CharIter::~CFX_CharIter() {}
+
+bool CFX_CharIter::Next(bool bPrev) {
+  if (bPrev) {
+    if (m_nIndex <= 0)
+      return false;
+    m_nIndex--;
+  } else {
+    if (m_nIndex + 1 >= m_wsText.GetLength())
+      return false;
+    m_nIndex++;
+  }
+  return true;
+}
+
+wchar_t CFX_CharIter::GetChar() {
+  return m_wsText.GetAt(m_nIndex);
+}
+
+void CFX_CharIter::SetAt(int32_t nIndex) {
+  if (nIndex < 0 || nIndex >= m_wsText.GetLength())
+    return;
+  m_nIndex = nIndex;
+}
+
+int32_t CFX_CharIter::GetAt() const {
+  return m_nIndex;
+}
+
+bool CFX_CharIter::IsEOF(bool bTail) const {
+  return bTail ? (m_nIndex + 1 == m_wsText.GetLength()) : (m_nIndex == 0);
+}
+
+IFX_CharIter* CFX_CharIter::Clone() {
+  CFX_CharIter* pIter = new CFX_CharIter(m_wsText);
+  pIter->m_nIndex = m_nIndex;
+  return pIter;
+}