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<?php declare(strict_types=1); |
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namespace AlecRabbit\Helpers; |
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class UCode |
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{ |
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/** |
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* @param string $subject |
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* @param null|int $n |
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* @return int |
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*/ |
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10 |
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public static function wcswidth(string $subject, ?int $n = null): int |
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{ |
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10 |
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$end = $n ?? mb_strlen($subject); |
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10 |
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$chrArray = array_slice( |
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static::split($subject), |
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0, |
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$end |
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); |
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$width = 0; |
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10 |
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foreach ($chrArray as $char) { |
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$wcw = static::wcwidth($char); |
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10 |
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if ($wcw < 0) { |
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1 |
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return -1; |
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} |
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9 |
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$width += $wcw; |
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} |
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return $width; |
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} |
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/** |
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* @param string $wc |
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* @return int |
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*/ |
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10 |
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public static function wcwidth(string $wc): int |
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{ |
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$ucs = mb_ord($wc); |
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10 |
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if (self::isB($ucs)) { |
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1 |
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return 0; |
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} |
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# C0/C1 control characters |
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10 |
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if ($ucs < 32 || (0x07F <= $ucs && $ucs < 0x0A0)) { |
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1 |
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return -1; |
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} |
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# combining characters with zero width |
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10 |
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if (static::bisearch($ucs, ZERO_WIDTH)) { |
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3 |
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return 0; |
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} |
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return 1 + static::bisearch($ucs, WIDE_EASTASIAN); |
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} |
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/** |
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* @param string $subject |
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* @return array |
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*/ |
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10 |
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protected static function split(string $subject): array |
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{ |
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$_split = preg_split('//u', $subject, -1, PREG_SPLIT_NO_EMPTY); |
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// @codeCoverageIgnoreStart |
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if (!\is_array($_split)) { |
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// Should never happen |
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throw new \RuntimeException('Failed to split string.'); |
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} |
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// @codeCoverageIgnoreEnd |
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return $_split; |
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} |
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10 |
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protected static function bisearch(int $ucs, array $table): int |
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{ |
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$lbound = 0; |
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$ubound = count($table) - 1; |
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if ($ucs < $table[0][0] || $ucs > $table[$ubound][1]) { |
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return 0; |
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} |
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while ($ubound >= $lbound) { |
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$mid = ($lbound + $ubound); // 2 |
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if ($ucs > $table[$mid][1]) { |
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6 |
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$lbound = $mid + 1; |
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} elseif ($ucs < $table[$mid][0]) { |
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$ubound = $mid - 1; |
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} else { |
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return 1; |
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} |
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} |
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6 |
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return 0; |
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} |
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/** |
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* @param int $ucs |
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* @return bool |
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*/ |
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10 |
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protected static function isB(int $ucs): bool |
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{ |
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return $ucs === 0 || |
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$ucs === 0x034F || |
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(0x200B <= $ucs && $ucs <= 0x200F) || |
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$ucs === 0x2028 || |
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$ucs === 0x2029 || |
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(0x202A <= $ucs && $ucs <= 0x202E) || |
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(0x2060 <= $ucs && $ucs <= 0x2063); |
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} |
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} |
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alecrabbit /
php-wcwidth
This check compares calls to functions or methods with their respective definitions. If the call has less arguments than are defined, it raises an issue.
If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. Please note the @ignore annotation hint above.