Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
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Intl.php
001 <?php
002
003 /*
004 * Copyright (C) 2016 Nicolas Grekas - p@tchwork.com
005 *
006 * This library is free software; you can redistribute it and/or modify it
007 * under the terms of the (at your option):
008 * Apache License v2.0 (http://apache.org/licenses/LICENSE-2.0.txt), or
009 * GNU General Public License v2.0 (http://gnu.org/licenses/gpl-2.0.txt).
010 */
011
012 namespace Patchwork\PHP\Shim;
013
014 /**
015 * Partial intl implementation in pure PHP.
016 *
017 * Implemented:
018 * - grapheme_extract - Extract a sequence of grapheme clusters from a text buffer, which must be encoded in UTF-8
019 * - grapheme_stripos - Find position (in grapheme units) of first occurrence of a case-insensitive string
020 * - grapheme_stristr - Returns part of haystack string from the first occurrence of case-insensitive needle to the end of haystack
021 * - grapheme_strlen - Get string length in grapheme units
022 * - grapheme_strpos - Find position (in grapheme units) of first occurrence of a string
023 * - grapheme_strripos - Find position (in grapheme units) of last occurrence of a case-insensitive string
024 * - grapheme_strrpos - Find position (in grapheme units) of last occurrence of a string
025 * - grapheme_strstr - Returns part of haystack string from the first occurrence of needle to the end of haystack
026 * - grapheme_substr - Return part of a string
027 *
028 * @internal
029 */
030 class Intl
031 {
032 // (CRLF|([ZWNJ-ZWJ]|T+|L*(LV?V+|LV|LVT)T*|L+|[^Control])[Extend]*|[Control])
033 // This regular expression is a work around for http://bugs.exim.org/1279
034 const GRAPHEME_CLUSTER_RX = '(?:\r\n|(?:[ -~\x{200C}\x{200D}]|[ᆨ-ᇹ]+|[ᄀ-ᅟ]*(?:[가개갸걔거게겨계고과괘괴교구궈궤귀규그긔기까깨꺄꺠꺼께껴꼐꼬꽈꽤꾀꾜꾸꿔꿰뀌뀨끄끠끼나내냐냬너네녀녜노놔놰뇌뇨누눠눼뉘뉴느늬니다대댜댸더데뎌뎨도돠돼되됴두둬뒈뒤듀드듸디따때땨떄떠떼뗘뗴또똬뙈뙤뚀뚜뚸뛔뛰뜌뜨띄띠라래랴럐러레려례로롸뢔뢰료루뤄뤠뤼류르릐리마매먀먜머메며몌모뫄뫠뫼묘무뭐뭬뮈뮤므믜미바배뱌뱨버베벼볘보봐봬뵈뵤부붜붸뷔뷰브븨비빠빼뺘뺴뻐뻬뼈뼤뽀뽜뽸뾔뾰뿌뿨쀄쀠쀼쁘쁴삐사새샤섀서세셔셰소솨쇄쇠쇼수숴쉐쉬슈스싀시싸쌔쌰썌써쎄쎠쎼쏘쏴쐐쐬쑈쑤쒀쒜쒸쓔쓰씌씨아애야얘어에여예오와왜외요우워웨위유으의이자재쟈쟤저제져졔조좌좨죄죠주줘줴쥐쥬즈즤지짜째쨔쨰쩌쩨쪄쪠쪼쫘쫴쬐쬬쭈쭤쮀쮜쮸쯔쯰찌차채챠챼처체쳐쳬초촤쵀최쵸추춰췌취츄츠츼치카캐캬컈커케켜켸코콰쾌쾨쿄쿠쿼퀘퀴큐크킈키타태탸턔터테텨톄토톼퇘퇴툐투퉈퉤튀튜트틔티파패퍄퍠퍼페펴폐포퐈퐤푀표푸풔풰퓌퓨프픠피하해햐햬허헤혀혜호화홰회효후훠훼휘휴흐희히]?[ᅠ-ᆢ]+|[가-힣])[ᆨ-ᇹ]*|[ᄀ-ᅟ]+|[^\p{Cc}\p{Cf}\p{Zl}\p{Zp}])[\p{Mn}\p{Me}\x{09BE}\x{09D7}\x{0B3E}\x{0B57}\x{0BBE}\x{0BD7}\x{0CC2}\x{0CD5}\x{0CD6}\x{0D3E}\x{0D57}\x{0DCF}\x{0DDF}\x{200C}\x{200D}\x{1D165}\x{1D16E}-\x{1D172}]*|[\p{Cc}\p{Cf}\p{Zl}\p{Zp}])';
035
036 public static function grapheme_extract($s, $size, $type = GRAPHEME_EXTR_COUNT, $start = 0, &$next = 0)
037 {
038 if (!is_scalar($s)) {
039 $hasError = false;
040 set_error_handler(function () use (&$hasError) {$hasError = true;});
041 $next = substr($s, $start);
042 restore_error_handler();
043 if ($hasError) {
044 substr($s, $start);
045 $s = '';
046 } else {
047 $s = $next;
048 }
049 } else {
050 $s = substr($s, $start);
051 }
052 $size = (int) $size;
053 $type = (int) $type;
054 $start = (int) $start;
055
056 if (!isset($s[0]) || 0 > $size || 0 > $start || 0 > $type || 2 < $type) {
057 return false;
058 }
059 if (0 === $size) {
060 return '';
061 }
062
063 $next = $start;
064
065 $s = preg_split('/('.GRAPHEME_CLUSTER_RX.')/u', "\r\n".$s, $size + 1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
066
067 if (!isset($s[1])) {
068 return false;
069 }
070
071 $i = 1;
072 $ret = '';
073
074 do {
075 if (GRAPHEME_EXTR_COUNT === $type) {
076 --$size;
077 } elseif (GRAPHEME_EXTR_MAXBYTES === $type) {
078 $size -= strlen($s[$i]);
079 } else {
080 $size -= iconv_strlen($s[$i], 'UTF-8//IGNORE');
081 }
082
083 if ($size >= 0) {
084 $ret .= $s[$i];
085 }
086 } while (isset($s[++$i]) && $size > 0);
087
088 $next += strlen($ret);
089
090 return $ret;
091 }
092
093 public static function grapheme_strlen($s)
094 {
095 preg_replace('/'.GRAPHEME_CLUSTER_RX.'/u', '', $s, -1, $len);
096
097 return 0 === $len && '' !== $s ? null : $len;
098 }
099
100 public static function grapheme_substr($s, $start, $len = 2147483647)
101 {
102 preg_match_all('/'.GRAPHEME_CLUSTER_RX.'/u', $s, $s);
103
104 $slen = count($s[0]);
105 $start = (int) $start;
106
107 if (0 > $start) {
108 $start += $slen;
109 }
110 if (0 > $start) {
111 return false;
112 }
113 if ($start >= $slen) {
114 return false;
115 }
116
117 $rem = $slen - $start;
118
119 if (0 > $len) {
120 $len += $rem;
121 }
122 if (0 === $len) {
123 return '';
124 }
125 if (0 > $len) {
126 return false;
127 }
128 if ($len > $rem) {
129 $len = $rem;
130 }
131
132 return implode('', array_slice($s[0], $start, $len));
133 }
134
135 public static function grapheme_substr_workaround62759($s, $start, $len)
136 {
137 // Intl based http://bugs.php.net/62759 and 55562 workaround
138
139 if (2147483647 == $len) {
140 return grapheme_substr($s, $start);
141 }
142
143 $s .= '';
144 $slen = grapheme_strlen($s);
145 $start = (int) $start;
146
147 if (0 > $start) {
148 $start += $slen;
149 }
150 if (0 > $start) {
151 return false;
152 }
153 if ($start >= $slen) {
154 return false;
155 }
156
157 $rem = $slen - $start;
158
159 if (0 > $len) {
160 $len += $rem;
161 }
162 if (0 === $len) {
163 return '';
164 }
165 if (0 > $len) {
166 return false;
167 }
168 if ($len > $rem) {
169 $len = $rem;
170 }
171
172 return grapheme_substr($s, $start, $len);
173 }
174
175 public static function grapheme_strpos($s, $needle, $offset = 0)
176 {
177 return self::grapheme_position($s, $needle, $offset, 0);
178 }
179
180 public static function grapheme_stripos($s, $needle, $offset = 0)
181 {
182 return self::grapheme_position($s, $needle, $offset, 1);
183 }
184
185 public static function grapheme_strrpos($s, $needle, $offset = 0)
186 {
187 return self::grapheme_position($s, $needle, $offset, 2);
188 }
189
190 public static function grapheme_strripos($s, $needle, $offset = 0)
191 {
192 return self::grapheme_position($s, $needle, $offset, 3);
193 }
194
195 public static function grapheme_stristr($s, $needle, $beforeNeedle = false)
196 {
197 return mb_stristr($s, $needle, $beforeNeedle, 'UTF-8');
198 }
199
200 public static function grapheme_strstr($s, $needle, $beforeNeedle = false)
201 {
202 return mb_strstr($s, $needle, $beforeNeedle, 'UTF-8');
203 }
204
205 private static function grapheme_position($s, $needle, $offset, $mode)
206 {
207 if (!preg_match('/./us', $needle .= '')) {
208 return false;
209 }
210 if (!preg_match('/./us', $s .= '')) {
211 return false;
212 }
213 if ($offset > 0) {
214 $s = self::grapheme_substr($s, $offset);
215 } elseif ($offset < 0) {
216 if (defined('HHVM_VERSION_ID') || PHP_VERSION_ID < 50535 || (50600 <= PHP_VERSION_ID && PHP_VERSION_ID < 50621) || (70000 <= PHP_VERSION_ID && PHP_VERSION_ID < 70006)) {
217 $offset = 0;
218 } else {
219 return false;
220 }
221 }
222
223 switch ($mode) {
224 case 0: $needle = iconv_strpos($s, $needle, 0, 'UTF-8'); break;
225 case 1: $needle = mb_stripos($s, $needle, 0, 'UTF-8'); break;
226 case 2: $needle = iconv_strrpos($s, $needle, 'UTF-8'); break;
227 default: $needle = mb_strripos($s, $needle, 0, 'UTF-8'); break;
228 }
229
230 return $needle ? self::grapheme_strlen(iconv_substr($s, 0, $needle, 'UTF-8')) + $offset : $needle;
231 }
232 }
233