forked from Wavyzz/dolibarr
131 lines
4.1 KiB
PHP
131 lines
4.1 KiB
PHP
<?php
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/* Copyright (C) 2011-2012 Laurent Destailleur <eldy@users.sourceforge.net>
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* Copyright (C) 2011-2012 Regis Houssin <regis.houssin@capnetworks.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* or see http://www.gnu.org/
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*/
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/**
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* \file htdocs/core/lib/json.lib.php
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* \brief Functions to emulate json function for PHP < 5.3 compatibility
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* \ingroup core
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*/
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/**
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* Implement json_encode for PHP that does not support it
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*
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* @param mixed $elements PHP Object to json encode
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* @return string Json encoded string
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* @deprecated Use json_encode native function
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*/
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function dol_json_encode($elements)
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{
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return json_encode($elements);
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}
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/**
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* Implement json_decode for PHP that does not support it
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*
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* @param string $json Json encoded to PHP Object or Array
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* @param bool $assoc False return an object, true return an array. Try to always use it with true !
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* @return mixed Object or Array
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* @deprecated Use json_decode native function
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*/
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function dol_json_decode($json, $assoc=false)
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{
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return json_decode($json, $assoc);
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}
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/**
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* Convert a string from one UTF-16 char to one UTF-8 char
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*
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* Normally should be handled by mb_convert_encoding, but
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* provides a slower PHP-only method for installations
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* that lack the multibye string extension.
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*
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* @param string $utf16 UTF-16 character
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* @return string UTF-8 character
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*/
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function utf162utf8($utf16)
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{
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// oh please oh please oh please oh please oh please
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if(function_exists('mb_convert_encoding')) {
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return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');
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}
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$bytes = (ord($utf16{0}) << 8) | ord($utf16{1});
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switch(true) {
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case ((0x7F & $bytes) == $bytes):
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// this case should never be reached, because we are in ASCII range
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
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return chr($bytes);
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case (0x07FF & $bytes) == $bytes:
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// return a 2-byte UTF-8 character
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
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return chr(0xC0 | (($bytes >> 6) & 0x1F))
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. chr(0x80 | ($bytes & 0x3F));
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case (0xFFFF & $bytes) == $bytes:
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// return a 3-byte UTF-8 character
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
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return chr(0xE0 | (($bytes >> 12) & 0x0F))
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. chr(0x80 | (($bytes >> 6) & 0x3F))
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. chr(0x80 | ($bytes & 0x3F));
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}
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// ignoring UTF-32 for now, sorry
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return '';
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}
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/**
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* Convert a string from one UTF-8 char to one UTF-16 char
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*
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* Normally should be handled by mb_convert_encoding, but
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* provides a slower PHP-only method for installations
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* that lack the multibye string extension.
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*
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* @param string $utf8 UTF-8 character
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* @return string UTF-16 character
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*/
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function utf82utf16($utf8)
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{
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// oh please oh please oh please oh please oh please
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if(function_exists('mb_convert_encoding')) {
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return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
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}
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switch(strlen($utf8)) {
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case 1:
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// this case should never be reached, because we are in ASCII range
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
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return $utf8;
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case 2:
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// return a UTF-16 character from a 2-byte UTF-8 char
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
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return chr(0x07 & (ord($utf8{0}) >> 2)) . chr((0xC0 & (ord($utf8{0}) << 6)) | (0x3F & ord($utf8{1})));
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case 3:
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// return a UTF-16 character from a 3-byte UTF-8 char
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// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
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return chr((0xF0 & (ord($utf8{0}) << 4)) | (0x0F & (ord($utf8{1}) >> 2))) . chr((0xC0 & (ord($utf8{1}) << 6)) | (0x7F & ord($utf8{2})));
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}
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// ignoring UTF-32 for now, sorry
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return '';
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}
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