| /* |
| * QR Code generator library (C++) |
| * |
| * Copyright (c) 2016 Project Nayuki |
| * https://www.nayuki.io/page/qr-code-generator-library |
| * |
| * (MIT License) |
| * Permission is hereby granted, free of charge, to any person obtaining a copy of |
| * this software and associated documentation files (the "Software"), to deal in |
| * the Software without restriction, including without limitation the rights to |
| * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of |
| * the Software, and to permit persons to whom the Software is furnished to do so, |
| * subject to the following conditions: |
| * - The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * - The Software is provided "as is", without warranty of any kind, express or |
| * implied, including but not limited to the warranties of merchantability, |
| * fitness for a particular purpose and noninfringement. In no event shall the |
| * authors or copyright holders be liable for any claim, damages or other |
| * liability, whether in an action of contract, tort or otherwise, arising from, |
| * out of or in connection with the Software or the use or other dealings in the |
| * Software. |
| */ |
| |
| #pragma once |
| |
| #include <stdint.h> |
| #include <stdlib.h> |
| |
| #include <vector> |
| |
| |
| namespace qrcodegen { |
| |
| /* |
| * Represents a character string to be encoded in a QR Code symbol. Each segment has |
| * a mode, and a sequence of characters that is already encoded as a sequence of bits. |
| * Instances of this class are immutable. |
| * This segment class imposes no length restrictions, but QR Codes have restrictions. |
| * Even in the most favorable conditions, a QR Code can only hold 7089 characters of data. |
| * Any segment longer than this is meaningless for the purpose of generating QR Codes. |
| */ |
| class QrSegment final { |
| |
| /*---- Public helper enumeration ----*/ |
| |
| /* |
| * The mode field of a segment. Immutable. Provides methods to retrieve closely related values. |
| */ |
| public: |
| class Mode final { |
| |
| /*-- Constants --*/ |
| public: |
| |
| static const Mode NUMERIC; |
| static const Mode ALPHANUMERIC; |
| static const Mode BYTE; |
| static const Mode KANJI; |
| |
| |
| /*-- Fields --*/ |
| |
| /* (Package-private) An unsigned 4-bit integer value (range 0 to 15) representing the mode indicator bits for this mode object. */ |
| public: |
| const int modeBits; |
| |
| private: |
| int numBitsCharCount[3]; |
| |
| |
| /*-- Constructor --*/ |
| |
| private: |
| Mode(int mode, int cc0, int cc1, int cc2); |
| |
| |
| /*-- Method --*/ |
| |
| /* |
| * (Package-private) Returns the bit width of the segment character count field for this mode object at the given version number. |
| */ |
| public: |
| int numCharCountBits(int ver) const; |
| |
| }; |
| |
| |
| |
| /*---- Public static factory functions ----*/ |
| public: |
| |
| /* |
| * Returns a segment representing the given binary data encoded in byte mode. |
| */ |
| static QrSegment makeBytes(const std::vector<uint8_t> &data); |
| |
| |
| /* |
| * Returns a segment representing the given string of decimal digits encoded in numeric mode. |
| */ |
| static QrSegment makeNumeric(const char *digits); |
| |
| |
| /* |
| * Returns a segment representing the given text string encoded in alphanumeric mode. The characters allowed are: |
| * 0 to 9, A to Z (uppercase only), space, dollar, percent, asterisk, plus, hyphen, period, slash, colon. |
| */ |
| static QrSegment makeAlphanumeric(const char *text); |
| |
| |
| /* |
| * Returns a list of zero or more segments to represent the given text string. |
| * The result may use various segment modes and switch modes to optimize the length of the bit stream. |
| */ |
| static std::vector<QrSegment> makeSegments(const char *text); |
| |
| |
| /*---- Public static helper functions ----*/ |
| public: |
| |
| /* |
| * Tests whether the given string can be encoded as a segment in alphanumeric mode. |
| */ |
| static bool isAlphanumeric(const char *text); |
| |
| |
| /* |
| * Tests whether the given string can be encoded as a segment in numeric mode. |
| */ |
| static bool isNumeric(const char *text); |
| |
| |
| |
| /*---- Instance fields ----*/ |
| public: |
| |
| /* The mode indicator for this segment. */ |
| const Mode mode; |
| |
| /* The length of this segment's unencoded data, measured in characters. Always zero or positive. */ |
| const int numChars; |
| |
| /* The bits of this segment packed into a byte array in big endian. */ |
| const std::vector<uint8_t> data; |
| |
| /* The length of this segment's encoded data, measured in bits. Satisfies ceil(bitLength / 8) = data.size(). */ |
| const int bitLength; |
| |
| /*---- Constructor ----*/ |
| public: |
| |
| /* |
| * Creates a new QR Code data segment with the given parameters and data. |
| */ |
| QrSegment(const Mode &md, int numCh, const std::vector<uint8_t> &b, int bitLen); |
| |
| |
| // Package-private helper function. |
| static int getTotalBits(const std::vector<QrSegment> &segs, int version); |
| |
| bool isValid() const; |
| |
| /*---- Private constant ----*/ |
| private: |
| |
| /* Maps shifted ASCII codes to alphanumeric mode character codes. */ |
| static const int8_t ALPHANUMERIC_ENCODING_TABLE[59]; |
| |
| }; |
| |
| } |