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<?php
namespace Zxing\Common;
/**
* Encapsulates a Character Set ECI, according to "Extended Channel
* Interpretations" 5.3.1.1 of ISO 18004.
*/
final class CharacterSetECI
{
/**#@+
* Character set constants.
*/
/**
* @var int
*/
public const CP437 = 0;
/**
* @var int
*/
public const ISO8859_1 = 1;
/**
* @var int
*/
public const ISO8859_2 = 4;
/**
* @var int
*/
public const ISO8859_3 = 5;
/**
* @var int
*/
public const ISO8859_4 = 6;
/**
* @var int
*/
public const ISO8859_5 = 7;
/**
* @var int
*/
public const ISO8859_6 = 8;
/**
* @var int
*/
public const ISO8859_7 = 9;
/**
* @var int
*/
public const ISO8859_8 = 10;
/**
* @var int
*/
public const ISO8859_9 = 11;
/**
* @var int
*/
public const ISO8859_10 = 12;
/**
* @var int
*/
public const ISO8859_11 = 13;
/**
* @var int
*/
public const ISO8859_12 = 14;
/**
* @var int
*/
public const ISO8859_13 = 15;
/**
* @var int
*/
public const ISO8859_14 = 16;
/**
* @var int
*/
public const ISO8859_15 = 17;
/**
* @var int
*/
public const ISO8859_16 = 18;
/**
* @var int
*/
public const SJIS = 20;
/**
* @var int
*/
public const CP1250 = 21;
/**
* @var int
*/
public const CP1251 = 22;
/**
* @var int
*/
public const CP1252 = 23;
/**
* @var int
*/
public const CP1256 = 24;
/**
* @var int
*/
public const UNICODE_BIG_UNMARKED = 25;
/**
* @var int
*/
public const UTF8 = 26;
/**
* @var int
*/
public const ASCII = 27;
/**
* @var int
*/
public const BIG5 = 28;
/**
* @var int
*/
public const GB18030 = 29;
/**
* @var int
*/
public const EUC_KR = 30;
/**
* Map between character names and their ECI values.
*/
private static array $nameToEci = [
'ISO-8859-1' => self::ISO8859_1,
'ISO-8859-2' => self::ISO8859_2,
'ISO-8859-3' => self::ISO8859_3,
'ISO-8859-4' => self::ISO8859_4,
'ISO-8859-5' => self::ISO8859_5,
'ISO-8859-6' => self::ISO8859_6,
'ISO-8859-7' => self::ISO8859_7,
'ISO-8859-8' => self::ISO8859_8,
'ISO-8859-9' => self::ISO8859_9,
'ISO-8859-10' => self::ISO8859_10,
'ISO-8859-11' => self::ISO8859_11,
'ISO-8859-12' => self::ISO8859_12,
'ISO-8859-13' => self::ISO8859_13,
'ISO-8859-14' => self::ISO8859_14,
'ISO-8859-15' => self::ISO8859_15,
'ISO-8859-16' => self::ISO8859_16,
'SHIFT-JIS' => self::SJIS,
'WINDOWS-1250' => self::CP1250,
'WINDOWS-1251' => self::CP1251,
'WINDOWS-1252' => self::CP1252,
'WINDOWS-1256' => self::CP1256,
'UTF-16BE' => self::UNICODE_BIG_UNMARKED,
'UTF-8' => self::UTF8,
'ASCII' => self::ASCII,
'GBK' => self::GB18030,
'EUC-KR' => self::EUC_KR,
];
/**#@-*/
/**
* Additional possible values for character sets.
*/
private static array $additionalValues = [
self::CP437 => 2,
self::ASCII => 170,
];
private static int|string|null $name = null;
/**
* Gets character set ECI by value.
*
*
* @return CharacterSetEci|null
*/
public static function getCharacterSetECIByValue(string $value)
{
if ($value < 0 || $value >= 900) {
throw new \InvalidArgumentException('Value must be between 0 and 900');
}
if (false !== ($key = array_search($value, self::$additionalValues))) {
$value = $key;
}
array_search($value, self::$nameToEci);
try {
self::setName($value);
return new self($value);
} catch (\UnexpectedValueException) {
return null;
}
}
/**
* @param (int|string) $value
*
* @psalm-param array-key $value
*
* @return null|true
*/
private static function setName($value)
{
foreach (self::$nameToEci as $name => $key) {
if ($key == $value) {
self::$name = $name;
return true;
}
}
if (self::$name == null) {
foreach (self::$additionalValues as $name => $key) {
if ($key == $value) {
self::$name = $name;
return true;
}
}
}
}
/**
* Gets character set ECI name.
*
* @return int|null|string set ECI name|null
*/
public static function name(): string|int|null
{
return self::$name;
}
/**
* Gets character set ECI by name.
*
*
* @return CharacterSetEci|null
*/
public static function getCharacterSetECIByName(string $name)
{
$name = strtoupper($name);
if (isset(self::$nameToEci[$name])) {
return new self(self::$nameToEci[$name]);
}
return null;
}
}
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