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authorDan Sinclair <dsinclair@chromium.org>2017-03-29 15:18:41 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-03-29 21:01:07 +0000
commite778668fe92b8c60e0537ee48f79d5af6c1a2f1e (patch)
treece7ce115b6f7306a6363f4a3d26d0de2c5646aea /fxbarcode/common/reedsolomon/BC_ReedSolomon.cpp
parentb929ab0886a2b0ceb701989ef126e5b0cabf6997 (diff)
downloadpdfium-e778668fe92b8c60e0537ee48f79d5af6c1a2f1e.tar.xz
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>
Diffstat (limited to 'fxbarcode/common/reedsolomon/BC_ReedSolomon.cpp')
-rw-r--r--fxbarcode/common/reedsolomon/BC_ReedSolomon.cpp105
1 files changed, 105 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];
+}