// 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_ReedSolomonGF256Poly.h" | |
#include "BC_ReedSolomonGF256.h" | |
CBC_ReedSolomonGF256 *CBC_ReedSolomonGF256::QRCodeFild = NULL; | |
CBC_ReedSolomonGF256 *CBC_ReedSolomonGF256::DataMatrixField = NULL; | |
void CBC_ReedSolomonGF256::Initialize() | |
{ | |
QRCodeFild = FX_NEW CBC_ReedSolomonGF256(0x011D); | |
QRCodeFild->Init(); | |
DataMatrixField = FX_NEW CBC_ReedSolomonGF256(0x012D); | |
DataMatrixField->Init(); | |
} | |
void CBC_ReedSolomonGF256::Finalize() | |
{ | |
if (QRCodeFild) { | |
delete QRCodeFild; | |
} | |
QRCodeFild = NULL; | |
if (DataMatrixField) { | |
delete DataMatrixField; | |
} | |
DataMatrixField = NULL; | |
} | |
CBC_ReedSolomonGF256::CBC_ReedSolomonGF256(FX_INT32 primitive) | |
{ | |
FX_INT32 x = 1; | |
for(FX_INT32 j = 0; j < 256; j++) { | |
m_expTable[j] = x; | |
x <<= 1; | |
if(x >= 0x100) { | |
x ^= primitive; | |
} | |
} | |
for(FX_INT32 i = 0; i < 255; i++) { | |
m_logTable[m_expTable[i]] = i; | |
} | |
m_logTable[0] = 0; | |
} | |
void CBC_ReedSolomonGF256::Init() | |
{ | |
m_zero = FX_NEW CBC_ReedSolomonGF256Poly(this, 0); | |
m_one = FX_NEW CBC_ReedSolomonGF256Poly(this, 1); | |
} | |
CBC_ReedSolomonGF256::~CBC_ReedSolomonGF256() | |
{ | |
if(m_zero != NULL) { | |
delete m_zero; | |
m_zero = NULL; | |
} | |
if(m_one != NULL) { | |
delete m_one; | |
m_one = NULL; | |
} | |
} | |
CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256::GetZero() | |
{ | |
return m_zero; | |
} | |
CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256::GetOne() | |
{ | |
return m_one; | |
} | |
CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256::BuildMonomial(FX_INT32 degree, FX_INT32 coefficient, FX_INT32 &e) | |
{ | |
if(degree < 0) { | |
e = BCExceptionDegreeIsNegative; | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
} | |
if(coefficient == 0) { | |
CBC_ReedSolomonGF256Poly* temp = m_zero->Clone(e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
return temp; | |
} | |
CFX_Int32Array coefficients; | |
coefficients.SetSize(degree + 1); | |
coefficients[0] = coefficient; | |
CBC_ReedSolomonGF256Poly *temp = FX_NEW CBC_ReedSolomonGF256Poly(); | |
temp->Init(this, &coefficients, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
return temp; | |
} | |
FX_INT32 CBC_ReedSolomonGF256::AddOrSubtract(FX_INT32 a, FX_INT32 b) | |
{ | |
return a ^ b; | |
} | |
FX_INT32 CBC_ReedSolomonGF256::Exp(FX_INT32 a) | |
{ | |
return m_expTable[a]; | |
} | |
FX_INT32 CBC_ReedSolomonGF256::Log(FX_INT32 a, FX_INT32 &e) | |
{ | |
if(a == 0) { | |
e = BCExceptionAIsZero; | |
BC_EXCEPTION_CHECK_ReturnValue(e, 0); | |
} | |
return m_logTable[a]; | |
} | |
FX_INT32 CBC_ReedSolomonGF256::Inverse(FX_INT32 a, FX_INT32 &e) | |
{ | |
if(a == 0) { | |
e = BCExceptionAIsZero; | |
BC_EXCEPTION_CHECK_ReturnValue(e, 0); | |
} | |
return m_expTable[255 - m_logTable[a]]; | |
} | |
FX_INT32 CBC_ReedSolomonGF256::Multiply(FX_INT32 a, FX_INT32 b) | |
{ | |
if(a == 0 || b == 0) { | |
return 0; | |
} | |
if(a == 1) { | |
return b; | |
} | |
if(b == 1) { | |
return a; | |
} | |
return m_expTable[(m_logTable[a] + m_logTable[b]) % 255]; | |
} |