mirror of https://github.com/status-im/qzxing.git
105 lines
3.4 KiB
C++
105 lines
3.4 KiB
C++
#ifndef __DECODED_BIT_STREAM_PARSER_DM_H__
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#define __DECODED_BIT_STREAM_PARSER_DM_H__
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/*
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* DecodedBitStreamParser.h
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* zxing
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*
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* Created by Luiz Silva on 09/02/2010.
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* Copyright 2010 ZXing authors All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <string>
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#include <sstream>
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#include <zxing/common/Array.h>
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#include <zxing/common/BitSource.h>
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#include <zxing/common/Counted.h>
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#include <zxing/common/DecoderResult.h>
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namespace zxing {
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namespace datamatrix {
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class DecodedBitStreamParser {
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private:
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static const int PAD_ENCODE = 0; // Not really an encoding
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static const int ASCII_ENCODE = 1;
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static const int C40_ENCODE = 2;
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static const int TEXT_ENCODE = 3;
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static const int ANSIX12_ENCODE = 4;
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static const int EDIFACT_ENCODE = 5;
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static const int BASE256_ENCODE = 6;
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/**
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* See ISO 16022:2006, Annex C Table C.1
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* The C40 Basic Character Set (*'s used for placeholders for the shift values)
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*/
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static const char C40_BASIC_SET_CHARS[];
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static const char C40_SHIFT2_SET_CHARS[];
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/**
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* See ISO 16022:2006, Annex C Table C.2
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* The Text Basic Character Set (*'s used for placeholders for the shift values)
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*/
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static const char TEXT_BASIC_SET_CHARS[];
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static const char TEXT_SHIFT3_SET_CHARS[];
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/**
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* See ISO 16022:2006, 5.2.3 and Annex C, Table C.2
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*/
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int decodeAsciiSegment(Ref<BitSource> bits, std::ostringstream &result, std::ostringstream &resultTrailer);
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/**
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* See ISO 16022:2006, 5.2.5 and Annex C, Table C.1
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*/
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void decodeC40Segment(Ref<BitSource> bits, std::ostringstream &result);
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/**
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* See ISO 16022:2006, 5.2.6 and Annex C, Table C.2
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*/
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void decodeTextSegment(Ref<BitSource> bits, std::ostringstream &result);
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/**
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* See ISO 16022:2006, 5.2.7
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*/
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void decodeAnsiX12Segment(Ref<BitSource> bits, std::ostringstream &result);
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/**
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* See ISO 16022:2006, 5.2.8 and Annex C Table C.3
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*/
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void decodeEdifactSegment(Ref<BitSource> bits, std::ostringstream &result);
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/**
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* See ISO 16022:2006, 5.2.9 and Annex B, B.2
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*/
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void decodeBase256Segment(Ref<BitSource> bits, std::ostringstream &result, std::vector<unsigned char> byteSegments);
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void parseTwoBytes(int firstByte, int secondByte, int*& result);
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/**
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* See ISO 16022:2006, Annex B, B.2
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*/
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unsigned char unrandomize255State(int randomizedBase256Codeword,
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int base256CodewordPosition) {
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int pseudoRandomNumber = ((149 * base256CodewordPosition) % 255) + 1;
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int tempVariable = randomizedBase256Codeword - pseudoRandomNumber;
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return (unsigned char) (tempVariable >= 0 ? tempVariable : (tempVariable + 256));
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};
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void append(std::ostream &ost, const unsigned char *bufIn, size_t nIn, const char *src);
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public:
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DecodedBitStreamParser() { };
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Ref<DecoderResult> decode(ArrayRef<unsigned char> bytes);
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};
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}
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}
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#endif // __DECODED_BIT_STREAM_PARSER_DM_H__
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