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, 369 insertions, 0 deletions

diff --git a/xfa/src/fxbarcode/pdf417/BC_PDF417ECErrorCorrection.cpp b/xfa/src/fxbarcode/pdf417/BC_PDF417ECErrorCorrection.cpp
new file mode 100644
index 0000000000..23207ef959
--- /dev/null
+++ b/xfa/src/fxbarcode/pdf417/BC_PDF417ECErrorCorrection.cpp
@@ -0,0 +1,369 @@
+// 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 2012 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_PDF417Common.h"

+#include "BC_PDF417ECModulusPoly.h"

+#include "BC_PDF417ECModulusGF.h"

+#include "BC_PDF417ECErrorCorrection.h"

+CBC_PDF417ECModulusGF* CBC_PDF417ECErrorCorrection::m_field = NULL;

+void CBC_PDF417ECErrorCorrection::Initialize(FX_INT32 &e)

+{

+    m_field = FX_NEW CBC_PDF417ECModulusGF(CBC_PDF417Common::NUMBER_OF_CODEWORDS, 3, e);

+}

+void CBC_PDF417ECErrorCorrection::Finalize()

+{

+    delete m_field;

+}

+CBC_PDF417ECErrorCorrection::CBC_PDF417ECErrorCorrection()

+{

+}

+CBC_PDF417ECErrorCorrection::~CBC_PDF417ECErrorCorrection()

+{

+}

+FX_INT32 CBC_PDF417ECErrorCorrection::decode(CFX_Int32Array &received, FX_INT32 numECCodewords, CFX_Int32Array &erasures, FX_INT32 &e)

+{

+    CBC_PDF417ECModulusPoly poly(m_field, received, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, -1);

+    CFX_Int32Array S;

+    S.SetSize(numECCodewords);

+    FX_BOOL error = FALSE;

+    for (FX_INT32 l = numECCodewords; l > 0; l--) {

+        FX_INT32 eval = poly.evaluateAt(m_field->exp(l));

+        S[numECCodewords - l] = eval;

+        if (eval != 0) {

+            error = TRUE;

+        }

+    }

+    if (!error) {

+        return 0;

+    }

+    CBC_PDF417ECModulusPoly* syndrome = FX_NEW CBC_PDF417ECModulusPoly(m_field, S, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, -1);

+    CBC_PDF417ECModulusPoly* buildmonomial = m_field->buildMonomial(numECCodewords, 1, e);

+    if (e != BCExceptionNO) {

+        delete syndrome;

+        return -1;

+    }

+    CFX_PtrArray* sigmaOmega = runEuclideanAlgorithm(buildmonomial, syndrome, numECCodewords, e);

+    delete buildmonomial;

+    delete syndrome;

+    BC_EXCEPTION_CHECK_ReturnValue(e, -1);

+    CBC_PDF417ECModulusPoly* sigma = (CBC_PDF417ECModulusPoly*)sigmaOmega->GetAt(0);

+    CBC_PDF417ECModulusPoly* omega = (CBC_PDF417ECModulusPoly*)sigmaOmega->GetAt(1);

+    CFX_Int32Array* errorLocations = findErrorLocations(sigma, e);

+    if (e != BCExceptionNO) {

+        for (FX_INT32 i = 0; i < sigmaOmega->GetSize(); i++) {

+            delete (CBC_PDF417ECModulusPoly*)sigmaOmega->GetAt(i);

+        }

+        sigmaOmega->RemoveAll();

+        delete sigmaOmega;

+        return -1;

+    }

+    CFX_Int32Array* errorMagnitudes = findErrorMagnitudes(omega, sigma, *errorLocations, e);

+    if (e != BCExceptionNO) {

+        delete errorLocations;

+        for (FX_INT32 i = 0; i < sigmaOmega->GetSize(); i++) {

+            delete (CBC_PDF417ECModulusPoly*)sigmaOmega->GetAt(i);

+        }

+        sigmaOmega->RemoveAll();

+        delete sigmaOmega;

+        return -1;

+    }

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

+        FX_INT32 log = m_field->log(errorLocations->GetAt(i), e);;

+        BC_EXCEPTION_CHECK_ReturnValue(e, -1);

+        FX_INT32 position = received.GetSize() - 1 - log;

+        if (position < 0) {

+            e = BCExceptionChecksumException;

+            delete errorLocations;

+            delete errorMagnitudes;

+            for (FX_INT32 j = 0; j < sigmaOmega->GetSize(); j++) {

+                delete (CBC_PDF417ECModulusPoly*)sigmaOmega->GetAt(j);

+            }

+            sigmaOmega->RemoveAll();

+            delete sigmaOmega;

+            return -1;

+        }

+        received[position] = m_field->subtract(received[position], errorMagnitudes->GetAt(i));

+    }

+    FX_INT32 result = errorLocations->GetSize();

+    delete errorLocations;

+    delete errorMagnitudes;

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

+        delete (CBC_PDF417ECModulusPoly*)sigmaOmega->GetAt(k);

+    }

+    sigmaOmega->RemoveAll();

+    delete sigmaOmega;

+    return result;

+}

+CFX_PtrArray* CBC_PDF417ECErrorCorrection::runEuclideanAlgorithm(CBC_PDF417ECModulusPoly* a, CBC_PDF417ECModulusPoly* b, FX_INT32 R, FX_INT32 &e)

+{

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

+        CBC_PDF417ECModulusPoly* temp = a;

+        a = b;

+        b = temp;

+    }

+    CBC_PDF417ECModulusPoly* rLast = a;

+    CBC_PDF417ECModulusPoly* r = b;

+    CBC_PDF417ECModulusPoly* tLast = m_field->getZero();

+    CBC_PDF417ECModulusPoly* t = m_field->getOne();

+    CBC_PDF417ECModulusPoly* qtemp = NULL;

+    CBC_PDF417ECModulusPoly* rtemp = NULL;

+    CBC_PDF417ECModulusPoly* ttemp = NULL;

+    FX_INT32 i = 0;

+    FX_INT32 j = 0;

+    FX_INT32 m = 0;

+    FX_INT32 n = 0;

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

+        CBC_PDF417ECModulusPoly* rLastLast = rLast;

+        CBC_PDF417ECModulusPoly* tLastLast = tLast;

+        rLast = r;

+        tLast = t;

+        m = i;

+        n = j;

+        if (rLast->isZero()) {

+            e = BCExceptionChecksumException;

+            if (qtemp) {

+                delete qtemp;

+            }

+            if (rtemp) {

+                delete rtemp;

+            }

+            if (ttemp) {

+                delete ttemp;

+            }

+            return NULL;

+        }

+        r = rLastLast;

+        CBC_PDF417ECModulusPoly* q = m_field->getZero();

+        FX_INT32 denominatorLeadingTerm = rLast->getCoefficient(rLast->getDegree());

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

+        if (e != BCExceptionNO) {

+            if (qtemp) {

+                delete qtemp;

+            }

+            if (rtemp) {

+                delete rtemp;

+            }

+            if (ttemp) {

+                delete ttemp;

+            }

+            return NULL;

+        }

+        while (r->getDegree() >= rLast->getDegree() && !r->isZero()) {

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

+            FX_INT32 scale = m_field->multiply(r->getCoefficient(r->getDegree()), dltInverse);

+            CBC_PDF417ECModulusPoly* buildmonomial = m_field->buildMonomial(degreeDiff, scale, e);

+            if (e != BCExceptionNO) {

+                if (qtemp) {

+                    delete qtemp;

+                }

+                if (rtemp) {

+                    delete rtemp;

+                }

+                if (ttemp) {

+                    delete ttemp;

+                }

+                return NULL;

+            }

+            q = q->add(buildmonomial, e);

+            delete buildmonomial;

+            if (qtemp) {

+                delete qtemp;

+            }

+            if (e != BCExceptionNO) {

+                if (rtemp) {

+                    delete rtemp;

+                }

+                if (ttemp) {

+                    delete ttemp;

+                }

+                return NULL;

+            }

+            qtemp = q;

+            CBC_PDF417ECModulusPoly* multiply  = rLast->multiplyByMonomial(degreeDiff, scale, e);

+            if (e != BCExceptionNO) {

+                if (qtemp) {

+                    delete qtemp;

+                }

+                if (rtemp) {

+                    delete rtemp;

+                }

+                if (ttemp) {

+                    delete ttemp;

+                }

+                return NULL;

+            }

+            CBC_PDF417ECModulusPoly* temp = r;

+            r = temp->subtract(multiply, e);

+            delete multiply;

+            if (m > 1 && i > m) {

+                delete temp;

+                temp = NULL;

+            }

+            if (e != BCExceptionNO) {

+                if (qtemp) {

+                    delete qtemp;

+                }

+                if (rtemp) {

+                    delete rtemp;

+                }

+                if (ttemp) {

+                    delete ttemp;

+                }

+                return NULL;

+            }

+            rtemp = r;

+            i = m + 1;

+        }

+        ttemp = q->multiply(tLast, e);

+        if (qtemp) {

+            delete qtemp;

+            qtemp = NULL;

+        }

+        if (e != BCExceptionNO) {

+            if (rtemp) {

+                delete rtemp;

+            }

+            if (ttemp) {

+                delete ttemp;

+            }

+            return NULL;

+        }

+        t = ttemp->subtract(tLastLast, e);

+        if (n > 1 && j > n) {

+            delete tLastLast;

+        }

+        delete ttemp;

+        if (e != BCExceptionNO) {

+            if (rtemp) {

+                delete rtemp;

+            }

+            return NULL;

+        }

+        ttemp = t;

+        t = ttemp->negative(e);

+        delete ttemp;

+        if (e != BCExceptionNO) {

+            if (rtemp) {

+                delete rtemp;

+            }

+            return NULL;

+        }

+        ttemp = t;

+        j++;

+    }

+    FX_INT32 aa = t->getCoefficient(1);

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

+    if (sigmaTildeAtZero == 0) {

+        e = BCExceptionChecksumException;

+        if (rtemp) {

+            delete rtemp;

+        }

+        if (ttemp) {

+            delete ttemp;

+        }

+        return NULL;

+    }

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

+    if (e != BCExceptionNO) {

+        if (rtemp) {

+            delete rtemp;

+        }

+        if (ttemp) {

+            delete ttemp;

+        }

+        return NULL;

+    }

+    CBC_PDF417ECModulusPoly* sigma = t->multiply(inverse, e);

+    if (ttemp) {

+        delete ttemp;

+    }

+    if (e != BCExceptionNO) {

+        if (rtemp) {

+            delete rtemp;

+        }

+        return NULL;

+    }

+    CBC_PDF417ECModulusPoly* omega = r->multiply(inverse, e);

+    if (rtemp) {

+        delete rtemp;

+    }

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    CFX_PtrArray* modulusPoly = FX_NEW CFX_PtrArray;

+    modulusPoly->Add(sigma);

+    modulusPoly->Add(omega);

+    return modulusPoly;

+}

+CFX_Int32Array* CBC_PDF417ECErrorCorrection::findErrorLocations(CBC_PDF417ECModulusPoly* errorLocator, FX_INT32 &e)

+{

+    FX_INT32 numErrors = errorLocator->getDegree();

+    CFX_Int32Array* result = FX_NEW CFX_Int32Array;

+    result->SetSize(numErrors);

+    FX_INT32 ee = 0;

+    for (FX_INT32 i = 1; i < m_field->getSize() && ee < numErrors; i++) {

+        if (errorLocator->evaluateAt(i) == 0) {

+            result->SetAt(ee, m_field->inverse(i, e));

+            if (e != BCExceptionNO) {

+                delete result;

+                return NULL;

+            }

+            ee++;

+        }

+    }

+    if (ee != numErrors) {

+        e = BCExceptionChecksumException;

+        delete result;

+        return NULL;

+    }

+    return result;

+}

+CFX_Int32Array* CBC_PDF417ECErrorCorrection::findErrorMagnitudes(CBC_PDF417ECModulusPoly* errorEvaluator, CBC_PDF417ECModulusPoly* errorLocator, CFX_Int32Array &errorLocations, FX_INT32 &e)

+{

+    FX_INT32 errorLocatorDegree = errorLocator->getDegree();

+    CFX_Int32Array formalDerivativeCoefficients;

+    formalDerivativeCoefficients.SetSize(errorLocatorDegree);

+    for (FX_INT32 l = 1; l <= errorLocatorDegree; l++) {

+        formalDerivativeCoefficients[errorLocatorDegree - l] = m_field->multiply(l, errorLocator->getCoefficient(l));

+    }

+    CBC_PDF417ECModulusPoly formalDerivative(m_field, formalDerivativeCoefficients, e);

+    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);

+    FX_INT32 s = errorLocations.GetSize();

+    CFX_Int32Array* result = FX_NEW CFX_Int32Array;

+    result->SetSize(s);

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

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

+        if (e != BCExceptionNO) {

+            delete result;

+            return NULL;

+        }

+        FX_INT32 numerator = m_field->subtract(0, errorEvaluator->evaluateAt(xiInverse));

+        FX_INT32 denominator = m_field->inverse(formalDerivative.evaluateAt(xiInverse), e);

+        if (e != BCExceptionNO) {

+            delete result;

+            return NULL;

+        }

+        result->SetAt(i, m_field->multiply(numerator, denominator));

+    }

+    return result;

+}