Organize barcode codes into modules.

Previously all the files in barcode are lumped together.
The naming of some files are inconsistent,
leading to difficult understanding of the structure.
Now files are grouped based on different barcode type like in zxing.
This also matches what it looks like in other xfa folders.
The file names in each folder could be further modified to be consistent.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/842043002

1 files changed, 224 insertions, 0 deletions

diff --git a/xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.cpp b/xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.cpp
new file mode 100644
index 0000000000..3cb5e7762f
--- /dev/null
+++ b/xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.cpp
@@ -0,0 +1,224 @@
+// 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 "../../barcode.h"

+#include "BC_ReedSolomonGF256.h"

+#include "BC_ReedSolomonGF256Poly.h"

+#include "BC_ReedSolomonDecoder.h"

+CBC_ReedSolomonDecoder::CBC_ReedSolomonDecoder(CBC_ReedSolomonGF256* field)

+{

+    m_field = field;

+}

+CBC_ReedSolomonDecoder::~CBC_ReedSolomonDecoder()

+{

+}

+void CBC_ReedSolomonDecoder::Decode(CFX_Int32Array* received, FX_INT32 twoS, FX_INT32 &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 (FX_INT32 i = 0; i < twoS; i++) {

+        FX_INT32 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);

+    CBC_ReedSolomonGF256Poly* rsg = m_field->BuildMonomial(twoS, 1, e);

+    BC_EXCEPTION_CHECK_ReturnVoid(e);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp(rsg);

+    CFX_PtrArray* pa = RunEuclideanAlgorithm(temp.get(), &syndrome, twoS, e);

+    BC_EXCEPTION_CHECK_ReturnVoid(e);

+    CBC_AutoPtr<CFX_PtrArray > sigmaOmega(pa);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> sigma((CBC_ReedSolomonGF256Poly*)(*sigmaOmega)[0]);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> omega((CBC_ReedSolomonGF256Poly*)(*sigmaOmega)[1]);

+    CFX_Int32Array* ia1 = FindErrorLocations(sigma.get(), e);

+    BC_EXCEPTION_CHECK_ReturnVoid(e);

+    CBC_AutoPtr<CFX_Int32Array > errorLocations(ia1);

+    CFX_Int32Array* ia2 = FindErrorMagnitudes(omega.get(), errorLocations.get(), dataMatrix, e);

+    BC_EXCEPTION_CHECK_ReturnVoid(e);

+    CBC_AutoPtr<CFX_Int32Array > errorMagnitudes(ia2);

+    for (FX_INT32 k = 0; k < errorLocations->GetSize(); k++) {

+        FX_INT32 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, FX_INT32 R, FX_INT32 &e)

+{

+    if (a->GetDegree() < b->GetDegree()) {

+        CBC_ReedSolomonGF256Poly* temp = a;

+        a = b;

+        b = temp;

+    }

+    CBC_ReedSolomonGF256Poly* rsg1 = a->Clone(e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> rLast(rsg1);

+    CBC_ReedSolomonGF256Poly* rsg2 = b->Clone(e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> r(rsg2);

+    CBC_ReedSolomonGF256Poly* rsg3 = m_field->GetOne()->Clone(e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> sLast(rsg3);

+    CBC_ReedSolomonGF256Poly* rsg4 = m_field->GetZero()->Clone(e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> s(rsg4);

+    CBC_ReedSolomonGF256Poly* rsg5 = m_field->GetZero()->Clone(e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> tLast(rsg5);

+    CBC_ReedSolomonGF256Poly* rsg6 = m_field->GetOne()->Clone(e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> t(rsg6);

+    while (r->GetDegree() >= R / 2) {

+        CBC_AutoPtr<CBC_ReedSolomonGF256Poly> rLastLast = rLast;

+        CBC_AutoPtr<CBC_ReedSolomonGF256Poly> sLastLast = sLast;

+        CBC_AutoPtr<CBC_ReedSolomonGF256Poly> tLastlast = tLast;

+        rLast = r;

+        sLast = s;

+        tLast = t;

+        if (rLast->IsZero()) {

+            e = BCExceptionR_I_1IsZero;

+            BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        }

+        CBC_ReedSolomonGF256Poly* rsg7 =  rLastLast->Clone(e);

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        CBC_AutoPtr<CBC_ReedSolomonGF256Poly> rTemp(rsg7);

+        r = rTemp;

+        CBC_ReedSolomonGF256Poly* rsg8 =  m_field->GetZero()->Clone(e);

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        CBC_AutoPtr<CBC_ReedSolomonGF256Poly> q(rsg8);

+        FX_INT32 denominatorLeadingTerm = rLast->GetCoefficients(rLast->GetDegree());

+        FX_INT32 dltInverse = m_field->Inverse(denominatorLeadingTerm, e);

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        while (r->GetDegree() >= rLast->GetDegree() && !(r->IsZero())) {

+            FX_INT32 degreeDiff = r->GetDegree() - rLast->GetDegree();

+            FX_INT32 scale = m_field->Multiply(r->GetCoefficients(r->GetDegree()), dltInverse);

+            CBC_ReedSolomonGF256Poly* rsgp1 = m_field->BuildMonomial(degreeDiff, scale, e);

+            BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+            CBC_AutoPtr<CBC_ReedSolomonGF256Poly> build(rsgp1);

+            CBC_ReedSolomonGF256Poly* rsgp2 = q->AddOrSubtract(build.get(), e);

+            BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+            CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp(rsgp2);

+            q = temp;

+            CBC_ReedSolomonGF256Poly* rsgp3 = rLast->MultiplyByMonomial(degreeDiff, scale, e);

+            BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+            CBC_AutoPtr<CBC_ReedSolomonGF256Poly> multiply(rsgp3);

+            CBC_ReedSolomonGF256Poly* rsgp4 = r->AddOrSubtract(multiply.get(), e);

+            BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+            CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp3(rsgp4);

+            r = temp3;

+        }

+        CBC_ReedSolomonGF256Poly* rsg9 = q->Multiply(sLast.get(), e);

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp1(rsg9);

+        CBC_ReedSolomonGF256Poly* rsg10 = temp1->AddOrSubtract(sLastLast.get(), e);

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp2(rsg10);

+        s = temp2;

+        CBC_ReedSolomonGF256Poly* rsg11 = q->Multiply(tLast.get(), e);

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp5(rsg11);

+        CBC_ReedSolomonGF256Poly* rsg12 = temp5->AddOrSubtract(tLastlast.get(), e);

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        CBC_AutoPtr<CBC_ReedSolomonGF256Poly> temp6(rsg12);

+        t = temp6;

+    }

+    FX_INT32 sigmaTildeAtZero = t->GetCoefficients(0);

+    if (sigmaTildeAtZero == 0) {

+        e = BCExceptionIsZero;

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    }

+    FX_INT32 inverse = m_field->Inverse(sigmaTildeAtZero, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CBC_ReedSolomonGF256Poly* rsg13 = t->Multiply(inverse, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> sigma(rsg13);

+    CBC_ReedSolomonGF256Poly* rsg14 = r->Multiply(inverse, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CBC_AutoPtr<CBC_ReedSolomonGF256Poly> omega(rsg14);

+    CFX_PtrArray *temp = FX_NEW CFX_PtrArray;

+    temp->Add(sigma.release());

+    temp->Add(omega.release());

+    return temp;

+}

+CFX_Int32Array *CBC_ReedSolomonDecoder::FindErrorLocations(CBC_ReedSolomonGF256Poly* errorLocator, FX_INT32 &e)

+{

+    FX_INT32 numErrors = errorLocator->GetDegree();

+    if (numErrors == 1) {

+        CBC_AutoPtr<CFX_Int32Array > temp(FX_NEW CFX_Int32Array);

+        temp->Add(errorLocator->GetCoefficients(1));

+        return temp.release();

+    }

+    CFX_Int32Array *tempT = FX_NEW CFX_Int32Array;

+    tempT->SetSize(numErrors);

+    CBC_AutoPtr<CFX_Int32Array > result(tempT);

+    FX_INT32 ie = 0;

+    for (FX_INT32 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, FX_INT32 &e)

+{

+    FX_INT32 s = errorLocations->GetSize();

+    CFX_Int32Array * temp = FX_NEW CFX_Int32Array;

+    temp->SetSize(s);

+    CBC_AutoPtr<CFX_Int32Array > result(temp);

+    for (FX_INT32 i = 0; i < s; i++) {

+        FX_INT32 xiInverse = m_field->Inverse(errorLocations->operator [](i), e);

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        FX_INT32 denominator = 1;

+        for(FX_INT32 j = 0; j < s; j++) {

+            if(i != j) {

+                denominator = m_field->Multiply(denominator,

+                                                CBC_ReedSolomonGF256::AddOrSubtract(1, m_field->Multiply(errorLocations->operator [](j), xiInverse)));

+            }

+        }

+        FX_INT32 temp = m_field->Inverse(denominator, temp);

+        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+        (*result)[i] = m_field->Multiply(errorEvaluator->EvaluateAt(xiInverse),

+                                         temp);

+    }

+    return result.release();

+}