Move xfa/fxbarcode fxbarcode/

Nothing in fxbarcode/ depends on XFA code. This CL moves xfa/fxbarcode
to be fxbarcode/ and creates a static_library for fxbarcode which is
depend on by the xfa library.

Change-Id: I0b708737b07efb94b769a5238d92af92bc62880d
Reviewed-on: https://pdfium-review.googlesource.com/3291
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

6 files changed, 621 insertions, 0 deletions

diff --git a/fxbarcode/common/reedsolomon/BC_ReedSolomon.cpp b/fxbarcode/common/reedsolomon/BC_ReedSolomon.cpp
new file mode 100644
index 0000000000..bb33bbd0e9
--- /dev/null
+++ b/fxbarcode/common/reedsolomon/BC_ReedSolomon.cpp
@@ -0,0 +1,105 @@
+// 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 "fxbarcode/common/reedsolomon/BC_ReedSolomon.h"
+
+#include <memory>
+
+#include "fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
+#include "fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.h"
+
+CBC_ReedSolomonEncoder::CBC_ReedSolomonEncoder(CBC_ReedSolomonGF256* field) {
+  m_field = field;
+}
+
+void CBC_ReedSolomonEncoder::Init() {
+  m_cachedGenerators.push_back(new CBC_ReedSolomonGF256Poly(m_field, 1));
+}
+
+CBC_ReedSolomonGF256Poly* CBC_ReedSolomonEncoder::BuildGenerator(size_t degree,
+                                                                 int32_t& e) {
+  if (degree >= m_cachedGenerators.size()) {
+    CBC_ReedSolomonGF256Poly* lastGenerator = m_cachedGenerators.back();
+    for (size_t d = m_cachedGenerators.size(); d <= degree; ++d) {
+      std::vector<int32_t> temp = {1, m_field->Exp(d - 1)};
+      CBC_ReedSolomonGF256Poly temp_poly;
+      temp_poly.Init(m_field, &temp, e);
+      if (e != BCExceptionNO)
+        return nullptr;
+      CBC_ReedSolomonGF256Poly* nextGenerator =
+          lastGenerator->Multiply(&temp_poly, e);
+      if (e != BCExceptionNO)
+        return nullptr;
+      m_cachedGenerators.push_back(nextGenerator);
+      lastGenerator = nextGenerator;
+    }
+  }
+  return m_cachedGenerators[degree];
+}
+
+void CBC_ReedSolomonEncoder::Encode(std::vector<int32_t>* toEncode,
+                                    size_t ecBytes,
+                                    int32_t& e) {
+  if (ecBytes == 0) {
+    e = BCExceptionNoCorrectionBytes;
+    return;
+  }
+  if (toEncode->size() <= ecBytes) {
+    e = BCExceptionNoDataBytesProvided;
+    return;
+  }
+  CBC_ReedSolomonGF256Poly* generator = BuildGenerator(ecBytes, e);
+  if (e != BCExceptionNO)
+    return;
+  size_t dataBytes = toEncode->size() - ecBytes;
+  std::vector<int32_t> infoCoefficients(dataBytes);
+  for (size_t x = 0; x < dataBytes; x++) {
+    infoCoefficients[x] = (*toEncode)[x];
+  }
+  CBC_ReedSolomonGF256Poly info;
+  info.Init(m_field, &infoCoefficients, e);
+  if (e != BCExceptionNO)
+    return;
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> infoTemp(
+      info.MultiplyByMonomial(ecBytes, 1, e));
+  if (e != BCExceptionNO)
+    return;
+  std::unique_ptr<std::vector<CBC_ReedSolomonGF256Poly*>> temp(
+      infoTemp->Divide(generator, e));
+  if (e != BCExceptionNO)
+    return;
+  CBC_ReedSolomonGF256Poly* remainder = (*temp)[1];
+  std::vector<int32_t>* coefficients = remainder->GetCoefficients();
+  size_t numZeroCoefficients =
+      ecBytes > coefficients->size() ? ecBytes - coefficients->size() : 0;
+  for (size_t i = 0; i < numZeroCoefficients; i++)
+    (*toEncode)[dataBytes + i] = 0;
+  for (size_t y = 0; y < coefficients->size(); y++)
+    (*toEncode)[dataBytes + numZeroCoefficients + y] = (*coefficients)[y];
+  for (size_t k = 0; k < temp->size(); k++)
+    delete (*temp)[k];
+}
+
+CBC_ReedSolomonEncoder::~CBC_ReedSolomonEncoder() {
+  for (size_t i = 0; i < m_cachedGenerators.size(); i++)
+    delete m_cachedGenerators[i];
+}
diff --git a/fxbarcode/common/reedsolomon/BC_ReedSolomon.h b/fxbarcode/common/reedsolomon/BC_ReedSolomon.h
new file mode 100644
index 0000000000..42a1e002ca
--- /dev/null
+++ b/fxbarcode/common/reedsolomon/BC_ReedSolomon.h
@@ -0,0 +1,32 @@
+// 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
+
+#ifndef FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMON_H_
+#define FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMON_H_
+
+#include <vector>
+
+#include "core/fxcrt/fx_basic.h"
+
+class CBC_ReedSolomonGF256;
+class CBC_ReedSolomonGF256Poly;
+
+class CBC_ReedSolomonEncoder {
+ public:
+  explicit CBC_ReedSolomonEncoder(CBC_ReedSolomonGF256* field);
+  virtual ~CBC_ReedSolomonEncoder();
+
+  void Encode(std::vector<int32_t>* toEncode, size_t ecBytes, int32_t& e);
+  virtual void Init();
+
+ private:
+  CBC_ReedSolomonGF256Poly* BuildGenerator(size_t degree, int32_t& e);
+
+  CBC_ReedSolomonGF256* m_field;
+  std::vector<CBC_ReedSolomonGF256Poly*> m_cachedGenerators;
+};
+
+#endif  // FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMON_H_
diff --git a/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.cpp b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.cpp
new file mode 100644
index 0000000000..b2af2a54b4
--- /dev/null
+++ b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.cpp
@@ -0,0 +1,135 @@
+// 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 "fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
+
+#include <vector>
+
+#include "fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.h"
+#include "third_party/base/ptr_util.h"
+
+CBC_ReedSolomonGF256* CBC_ReedSolomonGF256::QRCodeField = nullptr;
+CBC_ReedSolomonGF256* CBC_ReedSolomonGF256::DataMatrixField = nullptr;
+
+void CBC_ReedSolomonGF256::Initialize() {
+  QRCodeField = new CBC_ReedSolomonGF256(0x011D);
+  QRCodeField->Init();
+  DataMatrixField = new CBC_ReedSolomonGF256(0x012D);
+  DataMatrixField->Init();
+}
+
+void CBC_ReedSolomonGF256::Finalize() {
+  delete QRCodeField;
+  QRCodeField = nullptr;
+  delete DataMatrixField;
+  DataMatrixField = nullptr;
+}
+
+CBC_ReedSolomonGF256::CBC_ReedSolomonGF256(int32_t primitive) {
+  int32_t x = 1;
+  for (int32_t j = 0; j < 256; j++) {
+    m_expTable[j] = x;
+    x <<= 1;
+    if (x >= 0x100) {
+      x ^= primitive;
+    }
+  }
+  for (int32_t i = 0; i < 255; i++) {
+    m_logTable[m_expTable[i]] = i;
+  }
+  m_logTable[0] = 0;
+}
+
+void CBC_ReedSolomonGF256::Init() {
+  m_zero = pdfium::MakeUnique<CBC_ReedSolomonGF256Poly>(this, 0);
+  m_one = pdfium::MakeUnique<CBC_ReedSolomonGF256Poly>(this, 1);
+}
+
+CBC_ReedSolomonGF256::~CBC_ReedSolomonGF256() {}
+
+CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256::GetZero() const {
+  return m_zero.get();
+}
+
+CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256::GetOne() const {
+  return m_one.get();
+}
+
+CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256::BuildMonomial(
+    int32_t degree,
+    int32_t coefficient,
+    int32_t& e) {
+  if (degree < 0) {
+    e = BCExceptionDegreeIsNegative;
+    return nullptr;
+  }
+  if (coefficient == 0) {
+    CBC_ReedSolomonGF256Poly* temp = m_zero->Clone(e);
+    if (e != BCExceptionNO)
+      return nullptr;
+    return temp;
+  }
+  std::vector<int32_t> coefficients(degree + 1);
+  coefficients[0] = coefficient;
+  CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
+  temp->Init(this, &coefficients, e);
+  if (e != BCExceptionNO)
+    return nullptr;
+  return temp;
+}
+
+int32_t CBC_ReedSolomonGF256::AddOrSubtract(int32_t a, int32_t b) {
+  return a ^ b;
+}
+
+int32_t CBC_ReedSolomonGF256::Exp(int32_t a) {
+  return m_expTable[a];
+}
+
+int32_t CBC_ReedSolomonGF256::Log(int32_t a, int32_t& e) {
+  if (a == 0) {
+    e = BCExceptionAIsZero;
+    return 0;
+  }
+  return m_logTable[a];
+}
+
+int32_t CBC_ReedSolomonGF256::Inverse(int32_t a, int32_t& e) {
+  if (a == 0) {
+    e = BCExceptionAIsZero;
+    return 0;
+  }
+  return m_expTable[255 - m_logTable[a]];
+}
+
+int32_t CBC_ReedSolomonGF256::Multiply(int32_t a, int32_t b) {
+  if (a == 0 || b == 0) {
+    return 0;
+  }
+  if (a == 1) {
+    return b;
+  }
+  if (b == 1) {
+    return a;
+  }
+  return m_expTable[(m_logTable[a] + m_logTable[b]) % 255];
+}
diff --git a/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h
new file mode 100644
index 0000000000..d4b303c5ff
--- /dev/null
+++ b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h
@@ -0,0 +1,47 @@
+// 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
+
+#ifndef FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMONGF256_H_
+#define FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMONGF256_H_
+
+#include <memory>
+
+#include "core/fxcrt/fx_basic.h"
+#include "fxbarcode/utils.h"
+
+class CBC_ReedSolomonGF256Poly;
+
+class CBC_ReedSolomonGF256 {
+ public:
+  explicit CBC_ReedSolomonGF256(int32_t primitive);
+  virtual ~CBC_ReedSolomonGF256();
+
+  static void Initialize();
+  static void Finalize();
+
+  CBC_ReedSolomonGF256Poly* GetZero() const;
+  CBC_ReedSolomonGF256Poly* GetOne() const;
+  CBC_ReedSolomonGF256Poly* BuildMonomial(int32_t degree,
+                                          int32_t coefficient,
+                                          int32_t& e);
+  static int32_t AddOrSubtract(int32_t a, int32_t b);
+  int32_t Exp(int32_t a);
+  int32_t Log(int32_t a, int32_t& e);
+  int32_t Inverse(int32_t a, int32_t& e);
+  int32_t Multiply(int32_t a, int32_t b);
+  virtual void Init();
+
+  static CBC_ReedSolomonGF256* QRCodeField;
+  static CBC_ReedSolomonGF256* DataMatrixField;
+
+ private:
+  int32_t m_expTable[256];
+  int32_t m_logTable[256];
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> m_zero;
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> m_one;
+};
+
+#endif  // FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMONGF256_H_
diff --git a/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
new file mode 100644
index 0000000000..a062589218
--- /dev/null
+++ b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.cpp
@@ -0,0 +1,253 @@
+// 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 "fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.h"
+
+#include <memory>
+#include <utility>
+
+#include "fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
+#include "third_party/base/stl_util.h"
+
+CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly(CBC_ReedSolomonGF256* field,
+                                                   int32_t coefficients) {
+  if (!field)
+    return;
+
+  m_field = field;
+  m_coefficients.push_back(coefficients);
+}
+
+CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly() {
+  m_field = nullptr;
+}
+
+void CBC_ReedSolomonGF256Poly::Init(CBC_ReedSolomonGF256* field,
+                                    std::vector<int32_t>* coefficients,
+                                    int32_t& e) {
+  if (!coefficients || coefficients->empty()) {
+    e = BCExceptionCoefficientsSizeIsNull;
+    return;
+  }
+  m_field = field;
+  size_t coefficientsLength = coefficients->size();
+  if (coefficientsLength > 1 && coefficients->front() == 0) {
+    size_t firstNonZero = 1;
+    while (firstNonZero < coefficientsLength &&
+           (*coefficients)[firstNonZero] == 0) {
+      firstNonZero++;
+    }
+    if (firstNonZero == coefficientsLength) {
+      m_coefficients = *(m_field->GetZero()->GetCoefficients());
+    } else {
+      m_coefficients.resize(coefficientsLength - firstNonZero);
+      for (size_t i = firstNonZero, j = 0; i < coefficientsLength; i++, j++)
+        m_coefficients[j] = (*coefficients)[i];
+    }
+  } else {
+    m_coefficients = *coefficients;
+  }
+}
+
+std::vector<int32_t>* CBC_ReedSolomonGF256Poly::GetCoefficients() {
+  return &m_coefficients;
+}
+
+int32_t CBC_ReedSolomonGF256Poly::GetDegree() {
+  return pdfium::CollectionSize<int32_t>(m_coefficients) - 1;
+}
+
+bool CBC_ReedSolomonGF256Poly::IsZero() {
+  return m_coefficients.front() == 0;
+}
+
+int32_t CBC_ReedSolomonGF256Poly::GetCoefficients(int32_t degree) {
+  return m_coefficients[m_coefficients.size() - 1 - degree];
+}
+
+int32_t CBC_ReedSolomonGF256Poly::EvaluateAt(int32_t a) {
+  if (a == 0) {
+    return GetCoefficients(0);
+  }
+  size_t size = m_coefficients.size();
+  if (a == 1) {
+    int32_t result = 0;
+    for (size_t i = 0; i < size; i++)
+      result = CBC_ReedSolomonGF256::AddOrSubtract(result, m_coefficients[i]);
+    return result;
+  }
+  int32_t result = m_coefficients[0];
+  for (size_t j = 1; j < size; j++) {
+    result = CBC_ReedSolomonGF256::AddOrSubtract(m_field->Multiply(a, result),
+                                                 m_coefficients[j]);
+  }
+  return result;
+}
+
+CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Clone(int32_t& e) {
+  CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
+  temp->Init(m_field, &m_coefficients, e);
+  if (e != BCExceptionNO)
+    return nullptr;
+  return temp;
+}
+CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::AddOrSubtract(
+    CBC_ReedSolomonGF256Poly* other,
+    int32_t& e) {
+  if (IsZero())
+    return other->Clone(e);
+  if (other->IsZero())
+    return Clone(e);
+
+  std::vector<int32_t> smallerCoefficients = m_coefficients;
+  std::vector<int32_t> largerCoefficients = *(other->GetCoefficients());
+  if (smallerCoefficients.size() > largerCoefficients.size()) {
+    std::swap(smallerCoefficients, largerCoefficients);
+  }
+  std::vector<int32_t> sumDiff(largerCoefficients.size());
+  size_t lengthDiff = largerCoefficients.size() - smallerCoefficients.size();
+  for (size_t i = 0; i < lengthDiff; i++) {
+    sumDiff[i] = largerCoefficients[i];
+  }
+  for (size_t j = lengthDiff; j < largerCoefficients.size(); j++) {
+    sumDiff[j] = CBC_ReedSolomonGF256::AddOrSubtract(
+        smallerCoefficients[j - lengthDiff], largerCoefficients[j]);
+  }
+  CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
+  temp->Init(m_field, &sumDiff, e);
+  if (e != BCExceptionNO)
+    return nullptr;
+  return temp;
+}
+CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(
+    CBC_ReedSolomonGF256Poly* other,
+    int32_t& e) {
+  if (IsZero() || other->IsZero())
+    return m_field->GetZero()->Clone(e);
+
+  std::vector<int32_t> aCoefficients = m_coefficients;
+  std::vector<int32_t> bCoefficients = *(other->GetCoefficients());
+  size_t aLength = aCoefficients.size();
+  size_t bLength = bCoefficients.size();
+  std::vector<int32_t> product(aLength + bLength - 1);
+  for (size_t i = 0; i < aLength; i++) {
+    int32_t aCoeff = m_coefficients[i];
+    for (size_t j = 0; j < bLength; j++) {
+      product[i + j] = CBC_ReedSolomonGF256::AddOrSubtract(
+          product[i + j],
+          m_field->Multiply(aCoeff, (*other->GetCoefficients())[j]));
+    }
+  }
+  CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
+  temp->Init(m_field, &product, e);
+  if (e != BCExceptionNO)
+    return nullptr;
+  return temp;
+}
+CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(int32_t scalar,
+                                                             int32_t& e) {
+  if (scalar == 0)
+    return m_field->GetZero()->Clone(e);
+  if (scalar == 1)
+    return Clone(e);
+
+  size_t size = m_coefficients.size();
+  std::vector<int32_t> product(size);
+  for (size_t i = 0; i < size; i++) {
+    product[i] = m_field->Multiply(m_coefficients[i], scalar);
+  }
+  CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
+  temp->Init(m_field, &product, e);
+  if (e != BCExceptionNO)
+    return nullptr;
+  return temp;
+}
+CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::MultiplyByMonomial(
+    int32_t degree,
+    int32_t coefficient,
+    int32_t& e) {
+  if (degree < 0) {
+    e = BCExceptionDegreeIsNegative;
+    return nullptr;
+  }
+  if (coefficient == 0)
+    return m_field->GetZero()->Clone(e);
+
+  size_t size = m_coefficients.size();
+  std::vector<int32_t> product(size + degree);
+  for (size_t i = 0; i < size; i++) {
+    product[i] = m_field->Multiply(m_coefficients[i], coefficient);
+  }
+  CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly();
+  temp->Init(m_field, &product, e);
+  if (e != BCExceptionNO)
+    return nullptr;
+  return temp;
+}
+
+std::vector<CBC_ReedSolomonGF256Poly*>* CBC_ReedSolomonGF256Poly::Divide(
+    CBC_ReedSolomonGF256Poly* other,
+    int32_t& e) {
+  if (other->IsZero()) {
+    e = BCExceptionDivideByZero;
+    return nullptr;
+  }
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> quotient(
+      m_field->GetZero()->Clone(e));
+  if (e != BCExceptionNO)
+    return nullptr;
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> remainder(Clone(e));
+  if (e != BCExceptionNO)
+    return nullptr;
+  int32_t denominatorLeadingTerm = other->GetCoefficients(other->GetDegree());
+  int32_t inverseDenominatorLeadingTeam =
+      m_field->Inverse(denominatorLeadingTerm, e);
+  if (e != BCExceptionNO)
+    return nullptr;
+  while (remainder->GetDegree() >= other->GetDegree() && !remainder->IsZero()) {
+    int32_t degreeDifference = remainder->GetDegree() - other->GetDegree();
+    int32_t scale =
+        m_field->Multiply(remainder->GetCoefficients((remainder->GetDegree())),
+                          inverseDenominatorLeadingTeam);
+    std::unique_ptr<CBC_ReedSolomonGF256Poly> term(
+        other->MultiplyByMonomial(degreeDifference, scale, e));
+    if (e != BCExceptionNO)
+      return nullptr;
+    std::unique_ptr<CBC_ReedSolomonGF256Poly> iteratorQuotient(
+        m_field->BuildMonomial(degreeDifference, scale, e));
+    if (e != BCExceptionNO)
+      return nullptr;
+    quotient.reset(quotient->AddOrSubtract(iteratorQuotient.get(), e));
+    if (e != BCExceptionNO)
+      return nullptr;
+    remainder.reset(remainder->AddOrSubtract(term.get(), e));
+    if (e != BCExceptionNO)
+      return nullptr;
+  }
+  std::vector<CBC_ReedSolomonGF256Poly*>* tempPtrA =
+      new std::vector<CBC_ReedSolomonGF256Poly*>();
+  tempPtrA->push_back(quotient.release());
+  tempPtrA->push_back(remainder.release());
+  return tempPtrA;
+}
+
+CBC_ReedSolomonGF256Poly::~CBC_ReedSolomonGF256Poly() {}
diff --git a/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.h b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.h
new file mode 100644
index 0000000000..284b531e81
--- /dev/null
+++ b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.h
@@ -0,0 +1,49 @@
+// 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
+
+#ifndef FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMONGF256POLY_H_
+#define FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMONGF256POLY_H_
+
+#include <vector>
+
+#include "core/fxcrt/fx_basic.h"
+
+class CBC_ReedSolomonGF256;
+
+class CBC_ReedSolomonGF256Poly final {
+ public:
+  CBC_ReedSolomonGF256Poly(CBC_ReedSolomonGF256* field, int32_t coefficients);
+  CBC_ReedSolomonGF256Poly();
+  ~CBC_ReedSolomonGF256Poly();
+  void Init(CBC_ReedSolomonGF256* field,
+            std::vector<int32_t>* coefficients,
+            int32_t& e);
+
+  int32_t GetCoefficients(int32_t degree);
+  std::vector<int32_t>* GetCoefficients();
+  int32_t GetDegree();
+  bool IsZero();
+  int32_t EvaluateAt(int32_t a);
+  CBC_ReedSolomonGF256Poly* AddOrSubtract(CBC_ReedSolomonGF256Poly* other,
+                                          int32_t& e);
+  CBC_ReedSolomonGF256Poly* Multiply(CBC_ReedSolomonGF256Poly* other,
+                                     int32_t& e);
+  CBC_ReedSolomonGF256Poly* Multiply(int32_t scalar, int32_t& e);
+  CBC_ReedSolomonGF256Poly* MultiplyByMonomial(int32_t degree,
+                                               int32_t coefficient,
+                                               int32_t& e);
+  std::vector<CBC_ReedSolomonGF256Poly*>* Divide(
+      CBC_ReedSolomonGF256Poly* other,
+      int32_t& e);
+
+  CBC_ReedSolomonGF256Poly* Clone(int32_t& e);
+
+ private:
+  CBC_ReedSolomonGF256* m_field;
+  std::vector<int32_t> m_coefficients;
+};
+
+#endif  // FXBARCODE_COMMON_REEDSOLOMON_BC_REEDSOLOMONGF256POLY_H_