Move xfa/src up to xfa/.

This CL moves the xfa/src files up to the xfa/ directory and fixes the includes,
include guards, and build files.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1803723002 .

1 files changed, 221 insertions, 0 deletions

diff --git a/xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.cpp b/xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.cpp
new file mode 100644
index 0000000000..ff91c9ddc3
--- /dev/null
+++ b/xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.cpp
@@ -0,0 +1,221 @@
+// 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 "xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.h"
+
+#include <memory>
+#include <utility>
+
+#include "xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
+#include "xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256Poly.h"
+
+CBC_ReedSolomonDecoder::CBC_ReedSolomonDecoder(CBC_ReedSolomonGF256* field) {
+  m_field = field;
+}
+CBC_ReedSolomonDecoder::~CBC_ReedSolomonDecoder() {}
+void CBC_ReedSolomonDecoder::Decode(CFX_Int32Array* received,
+                                    int32_t twoS,
+                                    int32_t& e) {
+  CBC_ReedSolomonGF256Poly poly;
+  poly.Init(m_field, received, e);
+  BC_EXCEPTION_CHECK_ReturnVoid(e);
+  CFX_Int32Array syndromeCoefficients;
+  syndromeCoefficients.SetSize(twoS);
+  FX_BOOL dataMatrix = FALSE;
+  FX_BOOL noError = TRUE;
+  for (int32_t i = 0; i < twoS; i++) {
+    int32_t eval = poly.EvaluateAt(m_field->Exp(dataMatrix ? i + 1 : i));
+    syndromeCoefficients[twoS - 1 - i] = eval;
+    if (eval != 0) {
+      noError = FALSE;
+    }
+  }
+  if (noError) {
+    return;
+  }
+  CBC_ReedSolomonGF256Poly syndrome;
+  syndrome.Init(m_field, &syndromeCoefficients, e);
+  BC_EXCEPTION_CHECK_ReturnVoid(e);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> temp(
+      m_field->BuildMonomial(twoS, 1, e));
+  BC_EXCEPTION_CHECK_ReturnVoid(e);
+  std::unique_ptr<CFX_PtrArray> sigmaOmega(
+      RunEuclideanAlgorithm(temp.get(), &syndrome, twoS, e));
+  BC_EXCEPTION_CHECK_ReturnVoid(e);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> sigma(
+      (CBC_ReedSolomonGF256Poly*)(*sigmaOmega)[0]);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> omega(
+      (CBC_ReedSolomonGF256Poly*)(*sigmaOmega)[1]);
+  std::unique_ptr<CFX_Int32Array> errorLocations(
+      FindErrorLocations(sigma.get(), e));
+  BC_EXCEPTION_CHECK_ReturnVoid(e);
+  std::unique_ptr<CFX_Int32Array> errorMagnitudes(
+      FindErrorMagnitudes(omega.get(), errorLocations.get(), dataMatrix, e));
+  BC_EXCEPTION_CHECK_ReturnVoid(e);
+  for (int32_t k = 0; k < errorLocations->GetSize(); k++) {
+    int32_t position =
+        received->GetSize() - 1 - m_field->Log((*errorLocations)[k], e);
+    BC_EXCEPTION_CHECK_ReturnVoid(e);
+    if (position < 0) {
+      e = BCExceptionBadErrorLocation;
+      BC_EXCEPTION_CHECK_ReturnVoid(e);
+    }
+    (*received)[position] = CBC_ReedSolomonGF256::AddOrSubtract(
+        (*received)[position], (*errorMagnitudes)[k]);
+  }
+}
+CFX_PtrArray* CBC_ReedSolomonDecoder::RunEuclideanAlgorithm(
+    CBC_ReedSolomonGF256Poly* a,
+    CBC_ReedSolomonGF256Poly* b,
+    int32_t R,
+    int32_t& e) {
+  if (a->GetDegree() < b->GetDegree()) {
+    CBC_ReedSolomonGF256Poly* temp = a;
+    a = b;
+    b = temp;
+  }
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> rLast(a->Clone(e));
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> r(b->Clone(e));
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> sLast(m_field->GetOne()->Clone(e));
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> s(m_field->GetZero()->Clone(e));
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> tLast(m_field->GetZero()->Clone(e));
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> t(m_field->GetOne()->Clone(e));
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  while (r->GetDegree() >= R / 2) {
+    std::unique_ptr<CBC_ReedSolomonGF256Poly> rLastLast = std::move(rLast);
+    std::unique_ptr<CBC_ReedSolomonGF256Poly> sLastLast = std::move(sLast);
+    std::unique_ptr<CBC_ReedSolomonGF256Poly> tLastlast = std::move(tLast);
+    rLast = std::move(r);
+    sLast = std::move(s);
+    tLast = std::move(t);
+    if (rLast->IsZero()) {
+      e = BCExceptionR_I_1IsZero;
+      BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    }
+    r.reset(rLastLast->Clone(e));
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    std::unique_ptr<CBC_ReedSolomonGF256Poly> q(m_field->GetZero()->Clone(e));
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    int32_t denominatorLeadingTerm = rLast->GetCoefficients(rLast->GetDegree());
+    int32_t dltInverse = m_field->Inverse(denominatorLeadingTerm, e);
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    while (r->GetDegree() >= rLast->GetDegree() && !(r->IsZero())) {
+      int32_t degreeDiff = r->GetDegree() - rLast->GetDegree();
+      int32_t scale =
+          m_field->Multiply(r->GetCoefficients(r->GetDegree()), dltInverse);
+      std::unique_ptr<CBC_ReedSolomonGF256Poly> build(
+          m_field->BuildMonomial(degreeDiff, scale, e));
+      BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+      q.reset(q->AddOrSubtract(build.get(), e));
+      BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+      std::unique_ptr<CBC_ReedSolomonGF256Poly> multiply(
+          rLast->MultiplyByMonomial(degreeDiff, scale, e));
+      BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+      r.reset(r->AddOrSubtract(multiply.get(), e));
+      BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    }
+    std::unique_ptr<CBC_ReedSolomonGF256Poly> temp1(
+        q->Multiply(sLast.get(), e));
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    s.reset(temp1->AddOrSubtract(sLastLast.get(), e));
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    std::unique_ptr<CBC_ReedSolomonGF256Poly> temp5(
+        q->Multiply(tLast.get(), e));
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    t.reset(temp5->AddOrSubtract(tLastlast.get(), e));
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  }
+  int32_t sigmaTildeAtZero = t->GetCoefficients(0);
+  if (sigmaTildeAtZero == 0) {
+    e = BCExceptionIsZero;
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  }
+  int32_t inverse = m_field->Inverse(sigmaTildeAtZero, e);
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> sigma(t->Multiply(inverse, e));
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  std::unique_ptr<CBC_ReedSolomonGF256Poly> omega(r->Multiply(inverse, e));
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  CFX_PtrArray* temp = new CFX_PtrArray;
+  temp->Add(sigma.release());
+  temp->Add(omega.release());
+  return temp;
+}
+CFX_Int32Array* CBC_ReedSolomonDecoder::FindErrorLocations(
+    CBC_ReedSolomonGF256Poly* errorLocator,
+    int32_t& e) {
+  int32_t numErrors = errorLocator->GetDegree();
+  if (numErrors == 1) {
+    std::unique_ptr<CFX_Int32Array> temp(new CFX_Int32Array);
+    temp->Add(errorLocator->GetCoefficients(1));
+    return temp.release();
+  }
+  CFX_Int32Array* tempT = new CFX_Int32Array;
+  tempT->SetSize(numErrors);
+  std::unique_ptr<CFX_Int32Array> result(tempT);
+  int32_t ie = 0;
+  for (int32_t i = 1; i < 256 && ie < numErrors; i++) {
+    if (errorLocator->EvaluateAt(i) == 0) {
+      (*result)[ie] = m_field->Inverse(i, ie);
+      BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+      ie++;
+    }
+  }
+  if (ie != numErrors) {
+    e = BCExceptionDegreeNotMatchRoots;
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  }
+  return result.release();
+}
+CFX_Int32Array* CBC_ReedSolomonDecoder::FindErrorMagnitudes(
+    CBC_ReedSolomonGF256Poly* errorEvaluator,
+    CFX_Int32Array* errorLocations,
+    FX_BOOL dataMatrix,
+    int32_t& e) {
+  int32_t s = errorLocations->GetSize();
+  CFX_Int32Array* temp = new CFX_Int32Array;
+  temp->SetSize(s);
+  std::unique_ptr<CFX_Int32Array> result(temp);
+  for (int32_t i = 0; i < s; i++) {
+    int32_t xiInverse = m_field->Inverse(errorLocations->operator[](i), e);
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    int32_t denominator = 1;
+    for (int32_t j = 0; j < s; j++) {
+      if (i != j) {
+        denominator = m_field->Multiply(
+            denominator, CBC_ReedSolomonGF256::AddOrSubtract(
+                             1, m_field->Multiply(errorLocations->operator[](j),
+                                                  xiInverse)));
+      }
+    }
+    int32_t temp = m_field->Inverse(denominator, temp);
+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    (*result)[i] =
+        m_field->Multiply(errorEvaluator->EvaluateAt(xiInverse), temp);
+  }
+  return result.release();
+}