// 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 2010 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 "fxbarcode/oned/BC_OnedCode39Writer.h" #include <memory> #include "fxbarcode/BC_Writer.h" #include "fxbarcode/common/BC_CommonBitMatrix.h" #include "fxbarcode/oned/BC_OneDimWriter.h" namespace { const char ALPHABET_STRING[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. *$/+%"; const char CHECKSUM_STRING[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%"; const int32_t CHARACTER_ENCODINGS[44] = { 0x034, 0x121, 0x061, 0x160, 0x031, 0x130, 0x070, 0x025, 0x124, 0x064, 0x109, 0x049, 0x148, 0x019, 0x118, 0x058, 0x00D, 0x10C, 0x04C, 0x01C, 0x103, 0x043, 0x142, 0x013, 0x112, 0x052, 0x007, 0x106, 0x046, 0x016, 0x181, 0x0C1, 0x1C0, 0x091, 0x190, 0x0D0, 0x085, 0x184, 0x0C4, 0x094, 0x0A8, 0x0A2, 0x08A, 0x02A}; } // namespace CBC_OnedCode39Writer::CBC_OnedCode39Writer() : m_iWideNarrRatio(3) {} CBC_OnedCode39Writer::~CBC_OnedCode39Writer() {} bool CBC_OnedCode39Writer::CheckContentValidity( const WideStringView& contents) { for (size_t i = 0; i < contents.GetLength(); i++) { wchar_t ch = contents[i]; if ((ch >= L'0' && ch <= L'9') || (ch >= L'A' && ch <= L'Z') || ch == L'-' || ch == L'.' || ch == L' ' || ch == L'*' || ch == L'$' || ch == L'/' || ch == L'+' || ch == L'%') { continue; } return false; } return true; } WideString CBC_OnedCode39Writer::FilterContents( const WideStringView& contents) { WideString filtercontents; for (size_t i = 0; i < contents.GetLength(); i++) { wchar_t ch = contents[i]; if (ch == L'*' && (i == 0 || i == contents.GetLength() - 1)) { continue; } if (ch > 175) { i++; continue; } ch = Upper(ch); if ((ch >= L'0' && ch <= L'9') || (ch >= L'A' && ch <= L'Z') || ch == L'-' || ch == L'.' || ch == L' ' || ch == L'*' || ch == L'$' || ch == L'/' || ch == L'+' || ch == L'%') { filtercontents += ch; } } return filtercontents; } WideString CBC_OnedCode39Writer::RenderTextContents( const WideStringView& contents) { WideString renderContents; for (size_t i = 0; i < contents.GetLength(); i++) { wchar_t ch = contents[i]; if (ch == L'*' && (i == 0 || i == contents.GetLength() - 1)) { continue; } if (ch > 175) { i++; continue; } if ((ch >= L'0' && ch <= L'9') || (ch >= L'A' && ch <= L'Z') || (ch >= L'a' && ch <= L'z') || ch == L'-' || ch == L'.' || ch == L' ' || ch == L'*' || ch == L'$' || ch == L'/' || ch == L'+' || ch == L'%') { renderContents += ch; } } return renderContents; } bool CBC_OnedCode39Writer::SetTextLocation(BC_TEXT_LOC location) { if (location < BC_TEXT_LOC_NONE || location > BC_TEXT_LOC_BELOWEMBED) { return false; } m_locTextLoc = location; return true; } bool CBC_OnedCode39Writer::SetWideNarrowRatio(int8_t ratio) { if (ratio < 2 || ratio > 3) return false; m_iWideNarrRatio = ratio; return true; } uint8_t* CBC_OnedCode39Writer::EncodeWithHint(const ByteString& contents, BCFORMAT format, int32_t& outWidth, int32_t& outHeight, int32_t hints) { if (format != BCFORMAT_CODE_39) return nullptr; return CBC_OneDimWriter::EncodeWithHint(contents, format, outWidth, outHeight, hints); } void CBC_OnedCode39Writer::ToIntArray(int32_t a, int8_t* toReturn) { for (int32_t i = 0; i < 9; i++) { toReturn[i] = (a & (1 << i)) == 0 ? 1 : m_iWideNarrRatio; } } char CBC_OnedCode39Writer::CalcCheckSum(const ByteString& contents) { if (contents.GetLength() > 80) return '*'; int32_t checksum = 0; size_t len = strlen(ALPHABET_STRING); for (const auto& c : contents) { size_t j = 0; for (; j < len; j++) { if (ALPHABET_STRING[j] == c) { if (c != '*') checksum += j; break; } } if (j >= len) return '*'; } checksum = checksum % 43; return CHECKSUM_STRING[checksum]; } uint8_t* CBC_OnedCode39Writer::EncodeImpl(const ByteString& contents, int32_t& outlength) { char checksum = CalcCheckSum(contents); if (checksum == '*') return nullptr; int8_t widths[9] = {0}; int32_t wideStrideNum = 3; int32_t narrStrideNum = 9 - wideStrideNum; ByteString encodedContents = contents; if (m_bCalcChecksum) encodedContents += checksum; m_iContentLen = encodedContents.GetLength(); int32_t codeWidth = (wideStrideNum * m_iWideNarrRatio + narrStrideNum) * 2 + 1 + m_iContentLen; size_t len = strlen(ALPHABET_STRING); for (size_t j = 0; j < m_iContentLen; j++) { for (size_t i = 0; i < len; i++) { if (ALPHABET_STRING[i] != encodedContents[j]) continue; ToIntArray(CHARACTER_ENCODINGS[i], widths); for (size_t k = 0; k < 9; k++) codeWidth += widths[k]; } } outlength = codeWidth; std::unique_ptr<uint8_t, FxFreeDeleter> result(FX_Alloc(uint8_t, codeWidth)); ToIntArray(CHARACTER_ENCODINGS[39], widths); int32_t e = BCExceptionNO; int32_t pos = AppendPattern(result.get(), 0, widths, 9, 1, e); if (e != BCExceptionNO) return nullptr; int8_t narrowWhite[] = {1}; pos += AppendPattern(result.get(), pos, narrowWhite, 1, 0, e); if (e != BCExceptionNO) return nullptr; for (int32_t l = m_iContentLen - 1; l >= 0; l--) { for (size_t i = 0; i < len; i++) { if (ALPHABET_STRING[i] != encodedContents[l]) continue; ToIntArray(CHARACTER_ENCODINGS[i], widths); pos += AppendPattern(result.get(), pos, widths, 9, 1, e); if (e != BCExceptionNO) return nullptr; } pos += AppendPattern(result.get(), pos, narrowWhite, 1, 0, e); if (e != BCExceptionNO) return nullptr; } ToIntArray(CHARACTER_ENCODINGS[39], widths); pos += AppendPattern(result.get(), pos, widths, 9, 1, e); if (e != BCExceptionNO) return nullptr; auto* result_ptr = result.get(); for (int32_t i = 0; i < codeWidth / 2; i++) { result_ptr[i] ^= result_ptr[codeWidth - 1 - i]; result_ptr[codeWidth - 1 - i] ^= result_ptr[i]; result_ptr[i] ^= result_ptr[codeWidth - 1 - i]; } return result.release(); } bool CBC_OnedCode39Writer::encodedContents(const WideStringView& contents, WideString* result) { *result = WideString(contents); if (m_bCalcChecksum && m_bPrintChecksum) { WideString checksumContent = FilterContents(contents); ByteString str = checksumContent.UTF8Encode(); char checksum; checksum = CalcCheckSum(str); if (checksum == '*') return false; str += checksum; *result += checksum; } return true; } bool CBC_OnedCode39Writer::RenderResult(const WideStringView& contents, uint8_t* code, int32_t codeLength) { WideString encodedCon; if (!encodedContents(contents, &encodedCon)) return false; return CBC_OneDimWriter::RenderResult(encodedCon.AsStringView(), code, codeLength); }