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Diffstat (limited to 'vendor/symfony/yaml/Escaper.php')
-rw-r--r-- | vendor/symfony/yaml/Escaper.php | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/vendor/symfony/yaml/Escaper.php b/vendor/symfony/yaml/Escaper.php new file mode 100644 index 0000000..4b2559e --- /dev/null +++ b/vendor/symfony/yaml/Escaper.php @@ -0,0 +1,101 @@ +<?php + +/* + * This file is part of the Symfony package. + * + * (c) Fabien Potencier <fabien@symfony.com> + * + * For the full copyright and license information, please view the LICENSE + * file that was distributed with this source code. + */ + +namespace Symfony\Component\Yaml; + +/** + * Escaper encapsulates escaping rules for single and double-quoted + * YAML strings. + * + * @author Matthew Lewinski <matthew@lewinski.org> + * + * @internal + */ +class Escaper +{ + // Characters that would cause a dumped string to require double quoting. + const REGEX_CHARACTER_TO_ESCAPE = "[\\x00-\\x1f]|\xc2\x85|\xc2\xa0|\xe2\x80\xa8|\xe2\x80\xa9"; + + // Mapping arrays for escaping a double quoted string. The backslash is + // first to ensure proper escaping because str_replace operates iteratively + // on the input arrays. This ordering of the characters avoids the use of strtr, + // which performs more slowly. + private static $escapees = array('\\', '\\\\', '\\"', '"', + "\x00", "\x01", "\x02", "\x03", "\x04", "\x05", "\x06", "\x07", + "\x08", "\x09", "\x0a", "\x0b", "\x0c", "\x0d", "\x0e", "\x0f", + "\x10", "\x11", "\x12", "\x13", "\x14", "\x15", "\x16", "\x17", + "\x18", "\x19", "\x1a", "\x1b", "\x1c", "\x1d", "\x1e", "\x1f", + "\xc2\x85", "\xc2\xa0", "\xe2\x80\xa8", "\xe2\x80\xa9", + ); + private static $escaped = array('\\\\', '\\"', '\\\\', '\\"', + '\\0', '\\x01', '\\x02', '\\x03', '\\x04', '\\x05', '\\x06', '\\a', + '\\b', '\\t', '\\n', '\\v', '\\f', '\\r', '\\x0e', '\\x0f', + '\\x10', '\\x11', '\\x12', '\\x13', '\\x14', '\\x15', '\\x16', '\\x17', + '\\x18', '\\x19', '\\x1a', '\\e', '\\x1c', '\\x1d', '\\x1e', '\\x1f', + '\\N', '\\_', '\\L', '\\P', + ); + + /** + * Determines if a PHP value would require double quoting in YAML. + * + * @param string $value A PHP value + * + * @return bool True if the value would require double quotes + */ + public static function requiresDoubleQuoting(string $value): bool + { + return 0 < preg_match('/'.self::REGEX_CHARACTER_TO_ESCAPE.'/u', $value); + } + + /** + * Escapes and surrounds a PHP value with double quotes. + * + * @param string $value A PHP value + * + * @return string The quoted, escaped string + */ + public static function escapeWithDoubleQuotes(string $value): string + { + return sprintf('"%s"', str_replace(self::$escapees, self::$escaped, $value)); + } + + /** + * Determines if a PHP value would require single quoting in YAML. + * + * @param string $value A PHP value + * + * @return bool True if the value would require single quotes + */ + public static function requiresSingleQuoting(string $value): bool + { + // Determines if a PHP value is entirely composed of a value that would + // require single quoting in YAML. + if (\in_array(strtolower($value), array('null', '~', 'true', 'false', 'y', 'n', 'yes', 'no', 'on', 'off'))) { + return true; + } + + // Determines if the PHP value contains any single characters that would + // cause it to require single quoting in YAML. + return 0 < preg_match('/[ \s \' " \: \{ \} \[ \] , & \* \# \?] | \A[ \- ? | < > = ! % @ ` ]/x', $value); + } + + /** + * Escapes and surrounds a PHP value with single quotes. + * + * @param string $value A PHP value + * + * @return string The quoted, escaped string + */ + public static function escapeWithSingleQuotes(string $value): string + { + return sprintf("'%s'", str_replace('\'', '\'\'', $value)); + } +} |