1 files changed, 135 insertions, 0 deletions
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];
+}