* @copyright 2020 smiley * @license MIT */ namespace chillerlan\QRCode\Common; use chillerlan\QRCode\Data\{AlphaNum, Byte, Hanzi, Kanji, Number}; use chillerlan\QRCode\QRCodeException; /** * Data mode information - ISO 18004:2006, 6.4.1, Tables 2 and 3 */ final class Mode{ // ISO/IEC 18004:2000 Table 2 /** @var int */ public const TERMINATOR = 0b0000; /** @var int */ public const NUMBER = 0b0001; /** @var int */ public const ALPHANUM = 0b0010; /** @var int */ public const BYTE = 0b0100; /** @var int */ public const KANJI = 0b1000; /** @var int */ public const HANZI = 0b1101; /** @var int */ public const STRCTURED_APPEND = 0b0011; /** @var int */ public const FNC1_FIRST = 0b0101; /** @var int */ public const FNC1_SECOND = 0b1001; /** @var int */ public const ECI = 0b0111; /** * mode length bits for the version breakpoints 1-9, 10-26 and 27-40 * * ISO/IEC 18004:2000 Table 3 - Number of bits in Character Count Indicator */ public const LENGTH_BITS = [ self::NUMBER => [10, 12, 14], self::ALPHANUM => [ 9, 11, 13], self::BYTE => [ 8, 16, 16], self::KANJI => [ 8, 10, 12], self::HANZI => [ 8, 10, 12], self::ECI => [ 0, 0, 0], ]; /** * Map of data mode => interface (detection order) * * @var string[] */ public const INTERFACES = [ self::NUMBER => Number::class, self::ALPHANUM => AlphaNum::class, self::KANJI => Kanji::class, self::HANZI => Hanzi::class, self::BYTE => Byte::class, ]; /** * returns the length bits for the version breakpoints 1-9, 10-26 and 27-40 * * @throws \chillerlan\QRCode\QRCodeException */ public static function getLengthBitsForVersion(int $mode, int $version):int{ if(!isset(self::LENGTH_BITS[$mode])){ throw new QRCodeException('invalid mode given'); } $minVersion = 0; foreach([9, 26, 40] as $key => $breakpoint){ if($version > $minVersion && $version <= $breakpoint){ return self::LENGTH_BITS[$mode][$key]; } $minVersion = $breakpoint; } throw new QRCodeException(sprintf('invalid version number: %d', $version)); } }