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Diffstat (limited to 'vendor/wikimedia/utfnormal/src/Util.php')
| -rw-r--r-- | vendor/wikimedia/utfnormal/src/Util.php | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/vendor/wikimedia/utfnormal/src/Util.php b/vendor/wikimedia/utfnormal/src/Util.php new file mode 100644 index 00000000..e5049097 --- /dev/null +++ b/vendor/wikimedia/utfnormal/src/Util.php @@ -0,0 +1,157 @@ +<?php +namespace UtfNormal; + +use InvalidArgumentException; + +/** + * Some of these functions are adapted from places in MediaWiki. + * Should probably merge them for consistency. + * + * Copyright © 2004 Brion Vibber <brion@pobox.com> + * https://www.mediawiki.org/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * http://www.gnu.org/copyleft/gpl.html + * + * @file + * @ingroup UtfNormal + */ + +class Utils { + /** + * Return UTF-8 sequence for a given Unicode code point. + * + * @param $codepoint Integer: + * @return String + * @throws InvalidArgumentException if fed out of range data. + */ + public static function codepointToUtf8 ( $codepoint ) { + if ( $codepoint < 0x80 ) { + return chr( $codepoint ); + } + + if ( $codepoint < 0x800 ) { + return chr( $codepoint >> 6 & 0x3f | 0xc0 ) . + chr( $codepoint & 0x3f | 0x80 ); + } + + if ( $codepoint < 0x10000 ) { + return chr( $codepoint >> 12 & 0x0f | 0xe0 ) . + chr( $codepoint >> 6 & 0x3f | 0x80 ) . + chr( $codepoint & 0x3f | 0x80 ); + } + + if ( $codepoint < 0x110000 ) { + return chr( $codepoint >> 18 & 0x07 | 0xf0 ) . + chr( $codepoint >> 12 & 0x3f | 0x80 ) . + chr( $codepoint >> 6 & 0x3f | 0x80 ) . + chr( $codepoint & 0x3f | 0x80 ); + } + + throw new InvalidArgumentException( "Asked for code outside of range ($codepoint)" ); + } + + /** + * Take a series of space-separated hexadecimal numbers representing + * Unicode code points and return a UTF-8 string composed of those + * characters. Used by UTF-8 data generation and testing routines. + * + * @param $sequence String + * @return String + * @throws InvalidArgumentException if fed out of range data. + * @private Used in tests and data table generation + */ + public static function hexSequenceToUtf8 ( $sequence ) { + $utf = ''; + foreach ( explode( ' ', $sequence ) as $hex ) { + $n = hexdec( $hex ); + $utf .= self::codepointToUtf8( $n ); + } + + return $utf; + } + + /** + * Take a UTF-8 string and return a space-separated series of hex + * numbers representing Unicode code points. For debugging. + * + * @param string $str UTF-8 string. + * @return string + * @private + */ + private static function utf8ToHexSequence ( $str ) { + $buf = ''; + foreach ( preg_split( '//u', $str, -1, PREG_SPLIT_NO_EMPTY ) as $cp ) { + $buf .= sprintf( '%04x ', self::utf8ToCodepoint( $cp ) ); + } + + return rtrim( $buf ); + } + + /** + * Determine the Unicode codepoint of a single-character UTF-8 sequence. + * Does not check for invalid input data. + * + * @param $char String + * @return Integer + */ + public static function utf8ToCodepoint ( $char ) { + # Find the length + $z = ord( $char[0] ); + if ( $z & 0x80 ) { + $length = 0; + while ( $z & 0x80 ) { + $length++; + $z <<= 1; + } + } else { + $length = 1; + } + + if ( $length != strlen( $char ) ) { + return false; + } + + if ( $length == 1 ) { + return ord( $char ); + } + + # Mask off the length-determining bits and shift back to the original location + $z &= 0xff; + $z >>= $length; + + # Add in the free bits from subsequent bytes + for ( $i = 1; $i < $length; $i++ ) { + $z <<= 6; + $z |= ord( $char[$i] ) & 0x3f; + } + + return $z; + } + + /** + * Escape a string for inclusion in a PHP single-quoted string literal. + * + * @param string $string string to be escaped. + * @return String: escaped string. + */ + public static function escapeSingleString ( $string ) { + return strtr( $string, + array( + '\\' => '\\\\', + '\'' => '\\\'' + ) ); + } +} |