Symfony\Component\String\AbstractUnicodeString::wcswidth()

Complexity

Conditions	27
Paths	29

Size

Total Lines

72

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
    private function wcswidth(string $string): int
    {
        $width = 0;

        foreach (preg_split('//u', $string, -1, PREG_SPLIT_NO_EMPTY) as $c) {
            $codePoint = mb_ord($c, 'UTF-8');

            if (0 === $codePoint // NULL
                || 0x034F === $codePoint // COMBINING GRAPHEME JOINER
                || (0x200B <= $codePoint && 0x200F >= $codePoint) // ZERO WIDTH SPACE to RIGHT-TO-LEFT MARK
                || 0x2028 === $codePoint // LINE SEPARATOR
                || 0x2029 === $codePoint // PARAGRAPH SEPARATOR
                || (0x202A <= $codePoint && 0x202E >= $codePoint) // LEFT-TO-RIGHT EMBEDDING to RIGHT-TO-LEFT OVERRIDE
                || (0x2060 <= $codePoint && 0x2063 >= $codePoint) // WORD JOINER to INVISIBLE SEPARATOR
            ) {
                continue;
            }

            // Non printable characters
            if (32 > $codePoint // C0 control characters
                || (0x07F <= $codePoint && 0x0A0 > $codePoint) // C1 control characters and DEL
            ) {
                return -1;
            }

            static $tableZero;
            if (null === $tableZero) {
                $tableZero = require __DIR__.'/Resources/data/wcswidth_table_zero.php';
            }

            if ($codePoint >= $tableZero[0][0] && $codePoint <= $tableZero[$ubound = \count($tableZero) - 1][1]) {
                $lbound = 0;
                while ($ubound >= $lbound) {
                    $mid = floor(($lbound + $ubound) / 2);

                    if ($codePoint > $tableZero[$mid][1]) {
                        $lbound = $mid + 1;
                    } elseif ($codePoint < $tableZero[$mid][0]) {
                        $ubound = $mid - 1;
                    } else {
                        continue 2;
                    }
                }
            }

            static $tableWide;
            if (null === $tableWide) {
                $tableWide = require __DIR__.'/Resources/data/wcswidth_table_wide.php';
            }

            if ($codePoint >= $tableWide[0][0] && $codePoint <= $tableWide[$ubound = \count($tableWide) - 1][1]) {
                $lbound = 0;
                while ($ubound >= $lbound) {
                    $mid = floor(($lbound + $ubound) / 2);

                    if ($codePoint > $tableWide[$mid][1]) {
                        $lbound = $mid + 1;
                    } elseif ($codePoint < $tableWide[$mid][0]) {
                        $ubound = $mid - 1;
                    } else {
                        $width += 2;

                        continue 2;
                    }
                }
            }

            ++$width;
        }

        return $width;
    }
}