OLD | NEW |
1 // Copyright 2014 PDFium Authors. All rights reserved. | 1 // Copyright 2014 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 // Original code is licensed as follows: | 6 // Original code is licensed as follows: |
7 /* | 7 /* |
8 * Copyright 2007 ZXing authors | 8 * Copyright 2007 ZXing authors |
9 * | 9 * |
10 * Licensed under the Apache License, Version 2.0 (the "License"); | 10 * Licensed under the Apache License, Version 2.0 (the "License"); |
(...skipping 20 matching lines...) Expand all Loading... |
31 if (!field) | 31 if (!field) |
32 return; | 32 return; |
33 | 33 |
34 m_field = field; | 34 m_field = field; |
35 m_coefficients.Add(coefficients); | 35 m_coefficients.Add(coefficients); |
36 } | 36 } |
37 CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly() { | 37 CBC_ReedSolomonGF256Poly::CBC_ReedSolomonGF256Poly() { |
38 m_field = nullptr; | 38 m_field = nullptr; |
39 } | 39 } |
40 void CBC_ReedSolomonGF256Poly::Init(CBC_ReedSolomonGF256* field, | 40 void CBC_ReedSolomonGF256Poly::Init(CBC_ReedSolomonGF256* field, |
41 CFX_Int32Array* coefficients, | 41 CFX_ArrayTemplate<int32_t>* coefficients, |
42 int32_t& e) { | 42 int32_t& e) { |
43 if (!coefficients || coefficients->GetSize() == 0) { | 43 if (!coefficients || coefficients->GetSize() == 0) { |
44 e = BCExceptionCoefficientsSizeIsNull; | 44 e = BCExceptionCoefficientsSizeIsNull; |
45 BC_EXCEPTION_CHECK_ReturnVoid(e); | 45 BC_EXCEPTION_CHECK_ReturnVoid(e); |
46 } | 46 } |
47 m_field = field; | 47 m_field = field; |
48 int32_t coefficientsLength = coefficients->GetSize(); | 48 int32_t coefficientsLength = coefficients->GetSize(); |
49 if ((coefficientsLength > 1 && (*coefficients)[0] == 0)) { | 49 if ((coefficientsLength > 1 && (*coefficients)[0] == 0)) { |
50 int32_t firstNonZero = 1; | 50 int32_t firstNonZero = 1; |
51 while ((firstNonZero < coefficientsLength) && | 51 while ((firstNonZero < coefficientsLength) && |
52 ((*coefficients)[firstNonZero] == 0)) { | 52 ((*coefficients)[firstNonZero] == 0)) { |
53 firstNonZero++; | 53 firstNonZero++; |
54 } | 54 } |
55 if (firstNonZero == coefficientsLength) { | 55 if (firstNonZero == coefficientsLength) { |
56 m_coefficients.Copy(*(m_field->GetZero()->GetCoefficients())); | 56 m_coefficients.Copy(*(m_field->GetZero()->GetCoefficients())); |
57 } else { | 57 } else { |
58 m_coefficients.SetSize(coefficientsLength - firstNonZero); | 58 m_coefficients.SetSize(coefficientsLength - firstNonZero); |
59 for (int32_t i = firstNonZero, j = 0; i < coefficientsLength; i++, j++) { | 59 for (int32_t i = firstNonZero, j = 0; i < coefficientsLength; i++, j++) { |
60 m_coefficients[j] = coefficients->operator[](i); | 60 m_coefficients[j] = coefficients->operator[](i); |
61 } | 61 } |
62 } | 62 } |
63 } else { | 63 } else { |
64 m_coefficients.Copy(*coefficients); | 64 m_coefficients.Copy(*coefficients); |
65 } | 65 } |
66 } | 66 } |
67 CFX_Int32Array* CBC_ReedSolomonGF256Poly::GetCoefficients() { | 67 CFX_ArrayTemplate<int32_t>* CBC_ReedSolomonGF256Poly::GetCoefficients() { |
68 return &m_coefficients; | 68 return &m_coefficients; |
69 } | 69 } |
70 int32_t CBC_ReedSolomonGF256Poly::GetDegree() { | 70 int32_t CBC_ReedSolomonGF256Poly::GetDegree() { |
71 return m_coefficients.GetSize() - 1; | 71 return m_coefficients.GetSize() - 1; |
72 } | 72 } |
73 bool CBC_ReedSolomonGF256Poly::IsZero() { | 73 bool CBC_ReedSolomonGF256Poly::IsZero() { |
74 return m_coefficients[0] == 0; | 74 return m_coefficients[0] == 0; |
75 } | 75 } |
76 int32_t CBC_ReedSolomonGF256Poly::GetCoefficients(int32_t degree) { | 76 int32_t CBC_ReedSolomonGF256Poly::GetCoefficients(int32_t degree) { |
77 return m_coefficients[m_coefficients.GetSize() - 1 - degree]; | 77 return m_coefficients[m_coefficients.GetSize() - 1 - degree]; |
(...skipping 24 matching lines...) Expand all Loading... |
102 return temp; | 102 return temp; |
103 } | 103 } |
104 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::AddOrSubtract( | 104 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::AddOrSubtract( |
105 CBC_ReedSolomonGF256Poly* other, | 105 CBC_ReedSolomonGF256Poly* other, |
106 int32_t& e) { | 106 int32_t& e) { |
107 if (IsZero()) | 107 if (IsZero()) |
108 return other->Clone(e); | 108 return other->Clone(e); |
109 if (other->IsZero()) | 109 if (other->IsZero()) |
110 return Clone(e); | 110 return Clone(e); |
111 | 111 |
112 CFX_Int32Array smallerCoefficients; | 112 CFX_ArrayTemplate<int32_t> smallerCoefficients; |
113 smallerCoefficients.Copy(m_coefficients); | 113 smallerCoefficients.Copy(m_coefficients); |
114 CFX_Int32Array largerCoefficients; | 114 CFX_ArrayTemplate<int32_t> largerCoefficients; |
115 largerCoefficients.Copy(*(other->GetCoefficients())); | 115 largerCoefficients.Copy(*(other->GetCoefficients())); |
116 if (smallerCoefficients.GetSize() > largerCoefficients.GetSize()) { | 116 if (smallerCoefficients.GetSize() > largerCoefficients.GetSize()) { |
117 CFX_Int32Array temp; | 117 CFX_ArrayTemplate<int32_t> temp; |
118 temp.Copy(smallerCoefficients); | 118 temp.Copy(smallerCoefficients); |
119 smallerCoefficients.Copy(largerCoefficients); | 119 smallerCoefficients.Copy(largerCoefficients); |
120 largerCoefficients.Copy(temp); | 120 largerCoefficients.Copy(temp); |
121 } | 121 } |
122 CFX_Int32Array sumDiff; | 122 CFX_ArrayTemplate<int32_t> sumDiff; |
123 sumDiff.SetSize(largerCoefficients.GetSize()); | 123 sumDiff.SetSize(largerCoefficients.GetSize()); |
124 int32_t lengthDiff = | 124 int32_t lengthDiff = |
125 largerCoefficients.GetSize() - smallerCoefficients.GetSize(); | 125 largerCoefficients.GetSize() - smallerCoefficients.GetSize(); |
126 for (int32_t i = 0; i < lengthDiff; i++) { | 126 for (int32_t i = 0; i < lengthDiff; i++) { |
127 sumDiff[i] = largerCoefficients[i]; | 127 sumDiff[i] = largerCoefficients[i]; |
128 } | 128 } |
129 for (int32_t j = lengthDiff; j < largerCoefficients.GetSize(); j++) { | 129 for (int32_t j = lengthDiff; j < largerCoefficients.GetSize(); j++) { |
130 sumDiff[j] = (CBC_ReedSolomonGF256::AddOrSubtract( | 130 sumDiff[j] = (CBC_ReedSolomonGF256::AddOrSubtract( |
131 smallerCoefficients[j - lengthDiff], largerCoefficients[j])); | 131 smallerCoefficients[j - lengthDiff], largerCoefficients[j])); |
132 } | 132 } |
133 CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly(); | 133 CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly(); |
134 temp->Init(m_field, &sumDiff, e); | 134 temp->Init(m_field, &sumDiff, e); |
135 BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); | 135 BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
136 return temp; | 136 return temp; |
137 } | 137 } |
138 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply( | 138 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply( |
139 CBC_ReedSolomonGF256Poly* other, | 139 CBC_ReedSolomonGF256Poly* other, |
140 int32_t& e) { | 140 int32_t& e) { |
141 if (IsZero() || other->IsZero()) | 141 if (IsZero() || other->IsZero()) |
142 return m_field->GetZero()->Clone(e); | 142 return m_field->GetZero()->Clone(e); |
143 | 143 |
144 CFX_Int32Array aCoefficients; | 144 CFX_ArrayTemplate<int32_t> aCoefficients; |
145 aCoefficients.Copy(m_coefficients); | 145 aCoefficients.Copy(m_coefficients); |
146 int32_t aLength = m_coefficients.GetSize(); | 146 int32_t aLength = m_coefficients.GetSize(); |
147 CFX_Int32Array bCoefficients; | 147 CFX_ArrayTemplate<int32_t> bCoefficients; |
148 bCoefficients.Copy(*(other->GetCoefficients())); | 148 bCoefficients.Copy(*(other->GetCoefficients())); |
149 int32_t bLength = other->GetCoefficients()->GetSize(); | 149 int32_t bLength = other->GetCoefficients()->GetSize(); |
150 CFX_Int32Array product; | 150 CFX_ArrayTemplate<int32_t> product; |
151 product.SetSize(aLength + bLength - 1); | 151 product.SetSize(aLength + bLength - 1); |
152 for (int32_t i = 0; i < aLength; i++) { | 152 for (int32_t i = 0; i < aLength; i++) { |
153 int32_t aCoeff = m_coefficients[i]; | 153 int32_t aCoeff = m_coefficients[i]; |
154 for (int32_t j = 0; j < bLength; j++) { | 154 for (int32_t j = 0; j < bLength; j++) { |
155 product[i + j] = CBC_ReedSolomonGF256::AddOrSubtract( | 155 product[i + j] = CBC_ReedSolomonGF256::AddOrSubtract( |
156 product[i + j], | 156 product[i + j], |
157 m_field->Multiply(aCoeff, other->GetCoefficients()->operator[](j))); | 157 m_field->Multiply(aCoeff, other->GetCoefficients()->operator[](j))); |
158 } | 158 } |
159 } | 159 } |
160 CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly(); | 160 CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly(); |
161 temp->Init(m_field, &product, e); | 161 temp->Init(m_field, &product, e); |
162 BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); | 162 BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
163 return temp; | 163 return temp; |
164 } | 164 } |
165 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(int32_t scalar, | 165 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::Multiply(int32_t scalar, |
166 int32_t& e) { | 166 int32_t& e) { |
167 if (scalar == 0) | 167 if (scalar == 0) |
168 return m_field->GetZero()->Clone(e); | 168 return m_field->GetZero()->Clone(e); |
169 if (scalar == 1) | 169 if (scalar == 1) |
170 return Clone(e); | 170 return Clone(e); |
171 | 171 |
172 int32_t size = m_coefficients.GetSize(); | 172 int32_t size = m_coefficients.GetSize(); |
173 CFX_Int32Array product; | 173 CFX_ArrayTemplate<int32_t> product; |
174 product.SetSize(size); | 174 product.SetSize(size); |
175 for (int32_t i = 0; i < size; i++) { | 175 for (int32_t i = 0; i < size; i++) { |
176 product[i] = m_field->Multiply(m_coefficients[i], scalar); | 176 product[i] = m_field->Multiply(m_coefficients[i], scalar); |
177 } | 177 } |
178 CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly(); | 178 CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly(); |
179 temp->Init(m_field, &product, e); | 179 temp->Init(m_field, &product, e); |
180 BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); | 180 BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
181 return temp; | 181 return temp; |
182 } | 182 } |
183 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::MultiplyByMonomial( | 183 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256Poly::MultiplyByMonomial( |
184 int32_t degree, | 184 int32_t degree, |
185 int32_t coefficient, | 185 int32_t coefficient, |
186 int32_t& e) { | 186 int32_t& e) { |
187 if (degree < 0) { | 187 if (degree < 0) { |
188 e = BCExceptionDegreeIsNegative; | 188 e = BCExceptionDegreeIsNegative; |
189 return nullptr; | 189 return nullptr; |
190 } | 190 } |
191 if (coefficient == 0) | 191 if (coefficient == 0) |
192 return m_field->GetZero()->Clone(e); | 192 return m_field->GetZero()->Clone(e); |
193 | 193 |
194 int32_t size = m_coefficients.GetSize(); | 194 int32_t size = m_coefficients.GetSize(); |
195 CFX_Int32Array product; | 195 CFX_ArrayTemplate<int32_t> product; |
196 product.SetSize(size + degree); | 196 product.SetSize(size + degree); |
197 for (int32_t i = 0; i < size; i++) { | 197 for (int32_t i = 0; i < size; i++) { |
198 product[i] = (m_field->Multiply(m_coefficients[i], coefficient)); | 198 product[i] = (m_field->Multiply(m_coefficients[i], coefficient)); |
199 } | 199 } |
200 CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly(); | 200 CBC_ReedSolomonGF256Poly* temp = new CBC_ReedSolomonGF256Poly(); |
201 temp->Init(m_field, &product, e); | 201 temp->Init(m_field, &product, e); |
202 BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); | 202 BC_EXCEPTION_CHECK_ReturnValue(e, nullptr); |
203 return temp; | 203 return temp; |
204 } | 204 } |
205 | 205 |
(...skipping 32 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
238 CFX_ArrayTemplate<CBC_ReedSolomonGF256Poly*>* tempPtrA = | 238 CFX_ArrayTemplate<CBC_ReedSolomonGF256Poly*>* tempPtrA = |
239 new CFX_ArrayTemplate<CBC_ReedSolomonGF256Poly*>(); | 239 new CFX_ArrayTemplate<CBC_ReedSolomonGF256Poly*>(); |
240 tempPtrA->Add(quotient.release()); | 240 tempPtrA->Add(quotient.release()); |
241 tempPtrA->Add(remainder.release()); | 241 tempPtrA->Add(remainder.release()); |
242 return tempPtrA; | 242 return tempPtrA; |
243 } | 243 } |
244 | 244 |
245 CBC_ReedSolomonGF256Poly::~CBC_ReedSolomonGF256Poly() { | 245 CBC_ReedSolomonGF256Poly::~CBC_ReedSolomonGF256Poly() { |
246 m_coefficients.RemoveAll(); | 246 m_coefficients.RemoveAll(); |
247 } | 247 } |
OLD | NEW |