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Diffstat (limited to 'fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.cpp')
-rw-r--r--fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.cpp135
1 files changed, 135 insertions, 0 deletions
diff --git a/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.cpp b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.cpp
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index 0000000000..b2af2a54b4
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+++ b/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.cpp
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+// 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];
+}