1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 // Original code is licensed as follows: 7 /* 8 * Copyright 2012 ZXing authors 9 * 10 * Licensed under the Apache License, Version 2.0 (the "License"); 11 * you may not use this file except in compliance with the License. 12 * You may obtain a copy of the License at 13 * 14 * http://www.apache.org/licenses/LICENSE-2.0 15 * 16 * Unless required by applicable law or agreed to in writing, software 17 * distributed under the License is distributed on an "AS IS" BASIS, 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 19 * See the License for the specific language governing permissions and 20 * limitations under the License. 21 */ 22 23 #include "xfa/src/fxbarcode/barcode.h" 24 #include "BC_PDF417Common.h" 25 #include "BC_PDF417ECModulusPoly.h" 26 #include "BC_PDF417ECModulusGF.h" 27 CBC_PDF417ECModulusGF* CBC_PDF417ECModulusGF::PDF417_GF = NULL; 28 void CBC_PDF417ECModulusGF::Initialize(int32_t& e) { 29 PDF417_GF = 30 new CBC_PDF417ECModulusGF(CBC_PDF417Common::NUMBER_OF_CODEWORDS, 3, e); 31 } 32 void CBC_PDF417ECModulusGF::Finalize() { 33 delete PDF417_GF; 34 } 35 CBC_PDF417ECModulusGF::CBC_PDF417ECModulusGF(int32_t modulus, 36 int32_t generator, 37 int32_t& e) { 38 m_modulus = modulus; 39 m_expTable.SetSize(modulus); 40 m_logTable.SetSize(modulus); 41 int32_t x = 1; 42 for (int32_t i = 0; i < modulus; i++) { 43 m_expTable[i] = x; 44 x = (x * generator) % modulus; 45 } 46 for (int32_t j = 0; j < modulus - 1; j++) { 47 m_logTable[m_expTable[j]] = j; 48 } 49 CFX_Int32Array zero; 50 zero.Add(0); 51 m_zero = new CBC_PDF417ECModulusPoly(this, zero, e); 52 CFX_Int32Array one; 53 one.Add(1); 54 m_one = new CBC_PDF417ECModulusPoly(this, one, e); 55 } 56 CBC_PDF417ECModulusGF::~CBC_PDF417ECModulusGF() { 57 delete m_zero; 58 delete m_one; 59 } 60 CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusGF::getZero() { 61 return m_zero; 62 } 63 CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusGF::getOne() { 64 return m_one; 65 } 66 CBC_PDF417ECModulusPoly* CBC_PDF417ECModulusGF::buildMonomial( 67 int32_t degree, 68 int32_t coefficient, 69 int32_t& e) { 70 if (degree < 0) { 71 e = BCExceptionIllegalArgument; 72 return NULL; 73 } 74 CBC_PDF417ECModulusPoly* modulusPoly = NULL; 75 if (coefficient == 0) { 76 modulusPoly = new CBC_PDF417ECModulusPoly(m_zero->getField(), 77 m_zero->getCoefficients(), e); 78 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 79 return modulusPoly; 80 } 81 CFX_Int32Array coefficients; 82 coefficients.SetSize(degree + 1); 83 coefficients[0] = coefficient; 84 modulusPoly = new CBC_PDF417ECModulusPoly(this, coefficients, e); 85 BC_EXCEPTION_CHECK_ReturnValue(e, NULL); 86 return modulusPoly; 87 } 88 int32_t CBC_PDF417ECModulusGF::add(int32_t a, int32_t b) { 89 return (a + b) % m_modulus; 90 } 91 int32_t CBC_PDF417ECModulusGF::subtract(int32_t a, int32_t b) { 92 return (m_modulus + a - b) % m_modulus; 93 } 94 int32_t CBC_PDF417ECModulusGF::exp(int32_t a) { 95 return m_expTable[a]; 96 } 97 int32_t CBC_PDF417ECModulusGF::log(int32_t a, int32_t& e) { 98 if (a == 0) { 99 e = BCExceptionIllegalArgument; 100 return -1; 101 } 102 return m_logTable[a]; 103 } 104 int32_t CBC_PDF417ECModulusGF::inverse(int32_t a, int32_t& e) { 105 if (a == 0) { 106 e = BCExceptionIllegalArgument; 107 return -1; 108 } 109 return m_expTable[m_modulus - m_logTable[a] - 1]; 110 } 111 int32_t CBC_PDF417ECModulusGF::multiply(int32_t a, int32_t b) { 112 if (a == 0 || b == 0) { 113 return 0; 114 } 115 return m_expTable[(m_logTable[a] + m_logTable[b]) % (m_modulus - 1)]; 116 } 117 int32_t CBC_PDF417ECModulusGF::getSize() { 118 return m_modulus; 119 } 120
