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>

1 files changed, 253 insertions, 0 deletions

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() {}