// 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 2006-2007 Jeremias Maerki. * * 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/datamatrix/BC_ASCIIEncoder.h" #include "fxbarcode/datamatrix/BC_Encoder.h" #include "fxbarcode/datamatrix/BC_EncoderContext.h" #include "fxbarcode/datamatrix/BC_HighLevelEncoder.h" #include "fxbarcode/datamatrix/BC_SymbolInfo.h" #include "fxbarcode/utils.h" #include "third_party/base/optional.h" namespace { Optional<wchar_t> EncodeASCIIDigits(wchar_t digit1, wchar_t digit2) { if (!CBC_HighLevelEncoder::isDigit(digit1) || !CBC_HighLevelEncoder::isDigit(digit2)) { // This could potentially return 0 as a sentinel value. Then this function // can just return wchar_t instead of Optional<wchar_t>. return {}; } return static_cast<wchar_t>((digit1 - 48) * 10 + (digit2 - 48) + 130); } } // namespace CBC_ASCIIEncoder::CBC_ASCIIEncoder() {} CBC_ASCIIEncoder::~CBC_ASCIIEncoder() {} int32_t CBC_ASCIIEncoder::getEncodingMode() { return ASCII_ENCODATION; } void CBC_ASCIIEncoder::Encode(CBC_EncoderContext& context, int32_t& e) { int32_t n = CBC_HighLevelEncoder::determineConsecutiveDigitCount( context.m_msg, context.m_pos); if (n >= 2) { Optional<wchar_t> code = EncodeASCIIDigits( context.m_msg[context.m_pos], context.m_msg[context.m_pos + 1]); if (!code) { e = BCExceptionGeneric; return; } context.writeCodeword(*code); context.m_pos += 2; return; } wchar_t c = context.getCurrentChar(); int32_t newMode = CBC_HighLevelEncoder::lookAheadTest( context.m_msg, context.m_pos, getEncodingMode()); if (newMode != getEncodingMode()) { switch (newMode) { case BASE256_ENCODATION: context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_BASE256); context.signalEncoderChange(BASE256_ENCODATION); return; case C40_ENCODATION: context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_C40); context.signalEncoderChange(C40_ENCODATION); return; case X12_ENCODATION: context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_ANSIX12); context.signalEncoderChange(X12_ENCODATION); return; case TEXT_ENCODATION: context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_TEXT); context.signalEncoderChange(TEXT_ENCODATION); return; case EDIFACT_ENCODATION: context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_EDIFACT); context.signalEncoderChange(EDIFACT_ENCODATION); return; default: e = BCExceptionGeneric; return; } } if (CBC_HighLevelEncoder::isExtendedASCII(c)) { context.writeCodeword(CBC_HighLevelEncoder::UPPER_SHIFT); context.writeCodeword(static_cast<wchar_t>(c - 128 + 1)); } else { context.writeCodeword(static_cast<wchar_t>(c + 1)); } context.m_pos++; }