Philip P. Moltmann | d904c1e | 2018-03-19 09:26:45 -0700 | [diff] [blame] | 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 2010 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 "fxbarcode/oned/BC_OnedCode39Writer.h" |
| 24 | |
| 25 | #include <memory> |
| 26 | |
| 27 | #include "fxbarcode/BC_Writer.h" |
| 28 | #include "fxbarcode/common/BC_CommonBitMatrix.h" |
| 29 | #include "fxbarcode/oned/BC_OneDimWriter.h" |
| 30 | |
| 31 | namespace { |
| 32 | |
| 33 | const char kOnedCode39Alphabet[] = { |
| 34 | '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', |
| 35 | 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', |
| 36 | 'U', 'V', 'W', 'X', 'Y', 'Z', '-', '.', ' ', '*', '$', '/', '+', '%'}; |
| 37 | constexpr size_t kOnedCode39AlphabetLen = FX_ArraySize(kOnedCode39Alphabet); |
| 38 | |
| 39 | const char kOnedCode39Checksum[] = { |
| 40 | '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', |
| 41 | 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', |
| 42 | 'U', 'V', 'W', 'X', 'Y', 'Z', '-', '.', ' ', '$', '/', '+', '%'}; |
| 43 | static_assert(FX_ArraySize(kOnedCode39Checksum) == 43, "Wrong size"); |
| 44 | |
| 45 | const int16_t kOnedCode39CharacterEncoding[] = { |
| 46 | 0x0034, 0x0121, 0x0061, 0x0160, 0x0031, 0x0130, 0x0070, 0x0025, 0x0124, |
| 47 | 0x0064, 0x0109, 0x0049, 0x0148, 0x0019, 0x0118, 0x0058, 0x000D, 0x010C, |
| 48 | 0x004C, 0x001C, 0x0103, 0x0043, 0x0142, 0x0013, 0x0112, 0x0052, 0x0007, |
| 49 | 0x0106, 0x0046, 0x0016, 0x0181, 0x00C1, 0x01C0, 0x0091, 0x0190, 0x00D0, |
| 50 | 0x0085, 0x0184, 0x00C4, 0x0094, 0x00A8, 0x00A2, 0x008A, 0x002A}; |
| 51 | static_assert(FX_ArraySize(kOnedCode39CharacterEncoding) == 44, "Wrong size"); |
| 52 | |
| 53 | } // namespace |
| 54 | |
| 55 | CBC_OnedCode39Writer::CBC_OnedCode39Writer() : m_iWideNarrRatio(3) {} |
| 56 | |
| 57 | CBC_OnedCode39Writer::~CBC_OnedCode39Writer() {} |
| 58 | |
| 59 | bool CBC_OnedCode39Writer::CheckContentValidity( |
| 60 | const WideStringView& contents) { |
| 61 | for (size_t i = 0; i < contents.GetLength(); i++) { |
| 62 | wchar_t ch = contents[i]; |
| 63 | if ((ch >= L'0' && ch <= L'9') || (ch >= L'A' && ch <= L'Z') || |
| 64 | ch == L'-' || ch == L'.' || ch == L' ' || ch == L'*' || ch == L'$' || |
| 65 | ch == L'/' || ch == L'+' || ch == L'%') { |
| 66 | continue; |
| 67 | } |
| 68 | return false; |
| 69 | } |
| 70 | return true; |
| 71 | } |
| 72 | |
| 73 | WideString CBC_OnedCode39Writer::FilterContents( |
| 74 | const WideStringView& contents) { |
| 75 | WideString filtercontents; |
| 76 | for (size_t i = 0; i < contents.GetLength(); i++) { |
| 77 | wchar_t ch = contents[i]; |
| 78 | if (ch == L'*' && (i == 0 || i == contents.GetLength() - 1)) { |
| 79 | continue; |
| 80 | } |
| 81 | if (ch > 175) { |
| 82 | i++; |
| 83 | continue; |
| 84 | } |
| 85 | ch = Upper(ch); |
| 86 | if ((ch >= L'0' && ch <= L'9') || (ch >= L'A' && ch <= L'Z') || |
| 87 | ch == L'-' || ch == L'.' || ch == L' ' || ch == L'*' || ch == L'$' || |
| 88 | ch == L'/' || ch == L'+' || ch == L'%') { |
| 89 | filtercontents += ch; |
| 90 | } |
| 91 | } |
| 92 | return filtercontents; |
| 93 | } |
| 94 | |
| 95 | WideString CBC_OnedCode39Writer::RenderTextContents( |
| 96 | const WideStringView& contents) { |
| 97 | WideString renderContents; |
| 98 | for (size_t i = 0; i < contents.GetLength(); i++) { |
| 99 | wchar_t ch = contents[i]; |
| 100 | if (ch == L'*' && (i == 0 || i == contents.GetLength() - 1)) { |
| 101 | continue; |
| 102 | } |
| 103 | if (ch > 175) { |
| 104 | i++; |
| 105 | continue; |
| 106 | } |
| 107 | if ((ch >= L'0' && ch <= L'9') || (ch >= L'A' && ch <= L'Z') || |
| 108 | (ch >= L'a' && ch <= L'z') || ch == L'-' || ch == L'.' || ch == L' ' || |
| 109 | ch == L'*' || ch == L'$' || ch == L'/' || ch == L'+' || ch == L'%') { |
| 110 | renderContents += ch; |
| 111 | } |
| 112 | } |
| 113 | return renderContents; |
| 114 | } |
| 115 | |
| 116 | bool CBC_OnedCode39Writer::SetTextLocation(BC_TEXT_LOC location) { |
| 117 | if (location < BC_TEXT_LOC_NONE || location > BC_TEXT_LOC_BELOWEMBED) { |
| 118 | return false; |
| 119 | } |
| 120 | m_locTextLoc = location; |
| 121 | return true; |
| 122 | } |
| 123 | bool CBC_OnedCode39Writer::SetWideNarrowRatio(int8_t ratio) { |
| 124 | if (ratio < 2 || ratio > 3) |
| 125 | return false; |
| 126 | |
| 127 | m_iWideNarrRatio = ratio; |
| 128 | return true; |
| 129 | } |
| 130 | |
| 131 | uint8_t* CBC_OnedCode39Writer::EncodeWithHint(const ByteString& contents, |
| 132 | BCFORMAT format, |
| 133 | int32_t& outWidth, |
| 134 | int32_t& outHeight, |
| 135 | int32_t hints) { |
| 136 | if (format != BCFORMAT_CODE_39) |
| 137 | return nullptr; |
| 138 | return CBC_OneDimWriter::EncodeWithHint(contents, format, outWidth, outHeight, |
| 139 | hints); |
| 140 | } |
| 141 | |
| 142 | void CBC_OnedCode39Writer::ToIntArray(int16_t a, int8_t* toReturn) { |
| 143 | for (int32_t i = 0; i < 9; i++) { |
| 144 | toReturn[i] = (a & (1 << i)) == 0 ? 1 : m_iWideNarrRatio; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | char CBC_OnedCode39Writer::CalcCheckSum(const ByteString& contents) { |
| 149 | if (contents.GetLength() > 80) |
| 150 | return '*'; |
| 151 | |
| 152 | int32_t checksum = 0; |
| 153 | for (const auto& c : contents) { |
| 154 | size_t j = 0; |
| 155 | for (; j < kOnedCode39AlphabetLen; j++) { |
| 156 | if (kOnedCode39Alphabet[j] == c) { |
| 157 | if (c != '*') |
| 158 | checksum += j; |
| 159 | break; |
| 160 | } |
| 161 | } |
| 162 | if (j >= kOnedCode39AlphabetLen) |
| 163 | return '*'; |
| 164 | } |
| 165 | return kOnedCode39Checksum[checksum % FX_ArraySize(kOnedCode39Checksum)]; |
| 166 | } |
| 167 | |
| 168 | uint8_t* CBC_OnedCode39Writer::EncodeImpl(const ByteString& contents, |
| 169 | int32_t& outlength) { |
| 170 | char checksum = CalcCheckSum(contents); |
| 171 | if (checksum == '*') |
| 172 | return nullptr; |
| 173 | |
| 174 | int8_t widths[9] = {0}; |
| 175 | int32_t wideStrideNum = 3; |
| 176 | int32_t narrStrideNum = 9 - wideStrideNum; |
| 177 | ByteString encodedContents = contents; |
| 178 | if (m_bCalcChecksum) |
| 179 | encodedContents += checksum; |
| 180 | m_iContentLen = encodedContents.GetLength(); |
| 181 | int32_t codeWidth = (wideStrideNum * m_iWideNarrRatio + narrStrideNum) * 2 + |
| 182 | 1 + m_iContentLen; |
| 183 | for (size_t j = 0; j < m_iContentLen; j++) { |
| 184 | for (size_t i = 0; i < kOnedCode39AlphabetLen; i++) { |
| 185 | if (kOnedCode39Alphabet[i] != encodedContents[j]) |
| 186 | continue; |
| 187 | |
| 188 | ToIntArray(kOnedCode39CharacterEncoding[i], widths); |
| 189 | for (size_t k = 0; k < 9; k++) |
| 190 | codeWidth += widths[k]; |
| 191 | } |
| 192 | } |
| 193 | outlength = codeWidth; |
| 194 | std::unique_ptr<uint8_t, FxFreeDeleter> result(FX_Alloc(uint8_t, codeWidth)); |
| 195 | ToIntArray(kOnedCode39CharacterEncoding[39], widths); |
| 196 | int32_t e = BCExceptionNO; |
| 197 | int32_t pos = AppendPattern(result.get(), 0, widths, 9, 1, e); |
| 198 | if (e != BCExceptionNO) |
| 199 | return nullptr; |
| 200 | |
| 201 | int8_t narrowWhite[] = {1}; |
| 202 | pos += AppendPattern(result.get(), pos, narrowWhite, 1, 0, e); |
| 203 | if (e != BCExceptionNO) |
| 204 | return nullptr; |
| 205 | |
| 206 | for (int32_t l = m_iContentLen - 1; l >= 0; l--) { |
| 207 | for (size_t i = 0; i < kOnedCode39AlphabetLen; i++) { |
| 208 | if (kOnedCode39Alphabet[i] != encodedContents[l]) |
| 209 | continue; |
| 210 | |
| 211 | ToIntArray(kOnedCode39CharacterEncoding[i], widths); |
| 212 | pos += AppendPattern(result.get(), pos, widths, 9, 1, e); |
| 213 | if (e != BCExceptionNO) |
| 214 | return nullptr; |
| 215 | } |
| 216 | pos += AppendPattern(result.get(), pos, narrowWhite, 1, 0, e); |
| 217 | if (e != BCExceptionNO) |
| 218 | return nullptr; |
| 219 | } |
| 220 | ToIntArray(kOnedCode39CharacterEncoding[39], widths); |
| 221 | pos += AppendPattern(result.get(), pos, widths, 9, 1, e); |
| 222 | if (e != BCExceptionNO) |
| 223 | return nullptr; |
| 224 | |
| 225 | auto* result_ptr = result.get(); |
| 226 | for (int32_t i = 0; i < codeWidth / 2; i++) { |
| 227 | result_ptr[i] ^= result_ptr[codeWidth - 1 - i]; |
| 228 | result_ptr[codeWidth - 1 - i] ^= result_ptr[i]; |
| 229 | result_ptr[i] ^= result_ptr[codeWidth - 1 - i]; |
| 230 | } |
| 231 | return result.release(); |
| 232 | } |
| 233 | |
| 234 | bool CBC_OnedCode39Writer::encodedContents(const WideStringView& contents, |
| 235 | WideString* result) { |
| 236 | *result = WideString(contents); |
| 237 | if (m_bCalcChecksum && m_bPrintChecksum) { |
| 238 | WideString checksumContent = FilterContents(contents); |
| 239 | ByteString str = checksumContent.UTF8Encode(); |
| 240 | char checksum; |
| 241 | checksum = CalcCheckSum(str); |
| 242 | if (checksum == '*') |
| 243 | return false; |
| 244 | str += checksum; |
| 245 | *result += checksum; |
| 246 | } |
| 247 | return true; |
| 248 | } |
| 249 | |
| 250 | bool CBC_OnedCode39Writer::RenderResult(const WideStringView& contents, |
| 251 | uint8_t* code, |
| 252 | int32_t codeLength) { |
| 253 | WideString encodedCon; |
| 254 | if (!encodedContents(contents, &encodedCon)) |
| 255 | return false; |
| 256 | return CBC_OneDimWriter::RenderResult(encodedCon.AsStringView(), code, |
| 257 | codeLength); |
| 258 | } |