| // 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 "xfa/fxbarcode/pdf417/BC_PDF417Common.h" |
| #include "xfa/fxbarcode/pdf417/BC_PDF417ECModulusGF.h" |
| #include "xfa/fxbarcode/pdf417/BC_PDF417ECModulusPoly.h" |
| #include "xfa/fxbarcode/utils.h" |
| |
| CBC_PDF417ECModulusGF* CBC_PDF417ECModulusGF::PDF417_GF = nullptr; |
| void CBC_PDF417ECModulusGF::Initialize(int32_t& e) { |
| PDF417_GF = |
| new CBC_PDF417ECModulusGF(CBC_PDF417Common::NUMBER_OF_CODEWORDS, 3, e); |
| } |
| void CBC_PDF417ECModulusGF::Finalize() { |
| delete PDF417_GF; |
| } |
| CBC_PDF417ECModulusGF::CBC_PDF417ECModulusGF(int32_t modulus, |
| int32_t generator, |
| int32_t& e) { |
| m_modulus = modulus; |
| m_expTable.SetSize(modulus); |
| m_logTable.SetSize(modulus); |
| int32_t x = 1; |
| for (int32_t i = 0; i < modulus; i++) { |
| m_expTable[i] = x; |
| x = (x * generator) % modulus; |
| } |
| for (int32_t j = 0; j < modulus - 1; j++) { |
| m_logTable[m_expTable[j]] = j; |
| } |
| CFX_Int32Array zero; |
| zero.Add(0); |
| m_zero = new CBC_PDF417ECModulusPoly(this, zero, e); |
| CFX_Int32Array one; |
| one.Add(1); |
| m_one = 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( |
| int32_t degree, |
| int32_t coefficient, |
| int32_t& e) { |
| if (degree < 0) { |
| e = BCExceptionIllegalArgument; |
| return nullptr; |
| } |
| CBC_PDF417ECModulusPoly* modulusPoly = nullptr; |
| if (coefficient == 0) { |
| modulusPoly = new CBC_PDF417ECModulusPoly(m_zero->getField(), |
| m_zero->getCoefficients(), e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| return modulusPoly; |
| } |
| CFX_Int32Array coefficients; |
| coefficients.SetSize(degree + 1); |
| coefficients[0] = coefficient; |
| modulusPoly = new CBC_PDF417ECModulusPoly(this, coefficients, e); |
| BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
| return modulusPoly; |
| } |
| int32_t CBC_PDF417ECModulusGF::add(int32_t a, int32_t b) { |
| return (a + b) % m_modulus; |
| } |
| int32_t CBC_PDF417ECModulusGF::subtract(int32_t a, int32_t b) { |
| return (m_modulus + a - b) % m_modulus; |
| } |
| int32_t CBC_PDF417ECModulusGF::exp(int32_t a) { |
| return m_expTable[a]; |
| } |
| int32_t CBC_PDF417ECModulusGF::log(int32_t a, int32_t& e) { |
| if (a == 0) { |
| e = BCExceptionIllegalArgument; |
| return -1; |
| } |
| return m_logTable[a]; |
| } |
| int32_t CBC_PDF417ECModulusGF::inverse(int32_t a, int32_t& e) { |
| if (a == 0) { |
| e = BCExceptionIllegalArgument; |
| return -1; |
| } |
| return m_expTable[m_modulus - m_logTable[a] - 1]; |
| } |
| int32_t CBC_PDF417ECModulusGF::multiply(int32_t a, int32_t b) { |
| if (a == 0 || b == 0) { |
| return 0; |
| } |
| return m_expTable[(m_logTable[a] + m_logTable[b]) % (m_modulus - 1)]; |
| } |
| int32_t CBC_PDF417ECModulusGF::getSize() { |
| return m_modulus; |
| } |