diff --git a/fxbarcode/qrcode/BC_QRCoderBitVector.cpp b/fxbarcode/qrcode/BC_QRCoderBitVector.cpp
new file mode 100644
index 0000000..0822209
--- /dev/null
+++ b/fxbarcode/qrcode/BC_QRCoderBitVector.cpp
@@ -0,0 +1,127 @@
+// 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
+// Original code is licensed as follows:
+/*
+ * Copyright 2007 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "core/fxcrt/fx_memory.h"
+#include "fxbarcode/qrcode/BC_QRCoderBitVector.h"
+#include "fxbarcode/utils.h"
+
+CBC_QRCoderBitVector::CBC_QRCoderBitVector() {
+  m_sizeInBits = 0;
+  m_size = 32;
+}
+void CBC_QRCoderBitVector::Init() {
+  m_array = FX_Alloc(uint8_t, m_size);
+}
+CBC_QRCoderBitVector::~CBC_QRCoderBitVector() {
+  FX_Free(m_array);
+}
+void CBC_QRCoderBitVector::Clear() {
+  FX_Free(m_array);
+  m_sizeInBits = 0;
+  m_size = 32;
+  m_array = FX_Alloc(uint8_t, m_size);
+}
+int32_t CBC_QRCoderBitVector::At(int32_t index, int32_t& e) {
+  if (index < 0 || index >= m_sizeInBits) {
+    e = BCExceptionBadIndexException;
+    return 0;
+  }
+  int32_t value = m_array[index >> 3] & 0xff;
+  return (value >> (7 - (index & 0x7))) & 1;
+}
+int32_t CBC_QRCoderBitVector::sizeInBytes() {
+  return (m_sizeInBits + 7) >> 3;
+}
+int32_t CBC_QRCoderBitVector::Size() {
+  return m_sizeInBits;
+}
+void CBC_QRCoderBitVector::AppendBit(int32_t bit, int32_t& e) {
+  if (!(bit == 0 || bit == 1)) {
+    e = BCExceptionBadValueException;
+    return;
+  }
+  int32_t numBitsInLastByte = m_sizeInBits & 0x7;
+  if (numBitsInLastByte == 0) {
+    AppendByte(0);
+    m_sizeInBits -= 8;
+  }
+  m_array[m_sizeInBits >> 3] |= (bit << (7 - numBitsInLastByte));
+  ++m_sizeInBits;
+}
+void CBC_QRCoderBitVector::AppendBits(int32_t value,
+                                      int32_t numBits,
+                                      int32_t& e) {
+  if (numBits < 0 || numBits > 32) {
+    e = BCExceptionBadNumBitsException;
+    return;
+  }
+  int32_t numBitsLeft = numBits;
+  while (numBitsLeft > 0) {
+    if ((m_sizeInBits & 0x7) == 0 && numBitsLeft >= 8) {
+      int32_t newByte = (value >> (numBitsLeft - 8)) & 0xff;
+      AppendByte(newByte);
+      numBitsLeft -= 8;
+    } else {
+      int32_t bit = (value >> (numBitsLeft - 1)) & 1;
+      AppendBit(bit, e);
+      if (e != BCExceptionNO)
+        return;
+      --numBitsLeft;
+    }
+  }
+}
+void CBC_QRCoderBitVector::AppendBitVector(CBC_QRCoderBitVector* bits,
+                                           int32_t& e) {
+  int32_t size = bits->Size();
+  for (int32_t i = 0; i < size; i++) {
+    int32_t num = bits->At(i, e);
+    if (e != BCExceptionNO)
+      return;
+    AppendBit(num, e);
+    if (e != BCExceptionNO)
+      return;
+  }
+}
+void CBC_QRCoderBitVector::XOR(CBC_QRCoderBitVector* other, int32_t& e) {
+  if (m_sizeInBits != other->Size()) {
+    e = BCExceptioncanNotOperatexorOperator;
+    return;
+  }
+  int32_t sizeInBytes = (m_sizeInBits + 7) >> 3;
+  for (int32_t i = 0; i < sizeInBytes; ++i) {
+    m_array[i] ^= (other->GetArray())[i];
+  }
+}
+uint8_t* CBC_QRCoderBitVector::GetArray() {
+  return m_array;
+}
+void CBC_QRCoderBitVector::AppendByte(int32_t value) {
+  if ((m_sizeInBits >> 3) == m_size) {
+    uint8_t* newArray = FX_Alloc(uint8_t, m_size << 1);
+    FXSYS_memcpy(newArray, m_array, m_size);
+    FX_Free(m_array);
+    m_array = newArray;
+    m_size = m_size << 1;
+  }
+  m_array[m_sizeInBits >> 3] = (uint8_t)value;
+  m_sizeInBits += 8;
+}