// 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" | |
CBC_PDF417ECModulusGF* CBC_PDF417ECModulusGF::PDF417_GF = NULL; | |
void CBC_PDF417ECModulusGF::Initialize(FX_INT32 &e) | |
{ | |
PDF417_GF = FX_NEW CBC_PDF417ECModulusGF(CBC_PDF417Common::NUMBER_OF_CODEWORDS, 3, e); | |
} | |
void CBC_PDF417ECModulusGF::Finalize() | |
{ | |
delete PDF417_GF; | |
} | |
CBC_PDF417ECModulusGF::CBC_PDF417ECModulusGF(FX_INT32 modulus, FX_INT32 generator, FX_INT32 &e) | |
{ | |
m_modulus = modulus; | |
m_expTable.SetSize(modulus); | |
m_logTable.SetSize(modulus); | |
FX_INT32 x = 1; | |
for (FX_INT32 i = 0; i < modulus; i++) { | |
m_expTable[i] = x; | |
x = (x * generator) % modulus; | |
} | |
for (FX_INT32 j = 0; j < modulus - 1; j++) { | |
m_logTable[m_expTable[j]] = j; | |
} | |
CFX_Int32Array zero; | |
zero.Add(0); | |
m_zero = FX_NEW CBC_PDF417ECModulusPoly(this, zero, e); | |
CFX_Int32Array one; | |
one.Add(1); | |
m_one = FX_NEW CBC_PDF417ECModulusPoly(this, one, e); | |
} | |
CBC_PDF417ECModulusGF::~CBC_PDF417ECModulusGF() | |
{ | |
delete m_zero; | |
delete m_one; | |
} | |
CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusGF::getZero() | |
{ | |
return m_zero; | |
} | |
CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusGF::getOne() | |
{ | |
return m_one; | |
} | |
CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusGF::buildMonomial(FX_INT32 degree, FX_INT32 coefficient, FX_INT32 &e) | |
{ | |
if (degree < 0) { | |
e = BCExceptionIllegalArgument; | |
return NULL; | |
} | |
CBC_PDF417ECModulusPoly* modulusPoly = NULL; | |
if (coefficient == 0) { | |
modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(m_zero->getField(), m_zero->getCoefficients(), e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
return modulusPoly; | |
} | |
CFX_Int32Array coefficients; | |
coefficients.SetSize(degree + 1); | |
coefficients[0] = coefficient; | |
modulusPoly = FX_NEW CBC_PDF417ECModulusPoly(this, coefficients, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
return modulusPoly; | |
} | |
FX_INT32 CBC_PDF417ECModulusGF::add(FX_INT32 a, FX_INT32 b) | |
{ | |
return (a + b) % m_modulus; | |
} | |
FX_INT32 CBC_PDF417ECModulusGF::subtract(FX_INT32 a, FX_INT32 b) | |
{ | |
return (m_modulus + a - b) % m_modulus; | |
} | |
FX_INT32 CBC_PDF417ECModulusGF::exp(FX_INT32 a) | |
{ | |
return m_expTable[a]; | |
} | |
FX_INT32 CBC_PDF417ECModulusGF::log(FX_INT32 a, FX_INT32 &e) | |
{ | |
if (a == 0) { | |
e = BCExceptionIllegalArgument; | |
return -1; | |
} | |
return m_logTable[a]; | |
} | |
FX_INT32 CBC_PDF417ECModulusGF::inverse(FX_INT32 a, FX_INT32 &e) | |
{ | |
if (a == 0) { | |
e = BCExceptionIllegalArgument; | |
return -1; | |
} | |
return m_expTable[m_modulus - m_logTable[a] - 1]; | |
} | |
FX_INT32 CBC_PDF417ECModulusGF::multiply(FX_INT32 a, FX_INT32 b) | |
{ | |
if (a == 0 || b == 0) { | |
return 0; | |
} | |
return m_expTable[(m_logTable[a] + m_logTable[b]) % (m_modulus - 1)]; | |
} | |
FX_INT32 CBC_PDF417ECModulusGF::getSize() | |
{ | |
return m_modulus; | |
} |