two more subpackage blocks
[squirrelmail.git] / functions / imap_utf7_local.php
CommitLineData
334a77f8 1<?php
2
3/**
abaa3d33 4 * imap_utf7_local.php
334a77f8 5 *
82d304a0 6 * Copyright (c) 1999-2004 The SquirrelMail Project Team
334a77f8 7 * Licensed under the GNU GPL. For full terms see the file COPYING.
8 *
abaa3d33 9 * This implements all functions that do imap UTF7 conversions.
334a77f8 10 *
eb19bc67 11 * @version $Id$
d6c32258 12 * @package squirrelmail
eb19bc67 13 * @subpackage imap
334a77f8 14 */
15
d6c32258 16/**
17 * @param string $str
18 * @param string $to_encoding
19 * @param string $from_encoding
20 * @param string $default_charset
21 * @return string
22 */
abaa3d33 23function sqimap_mb_convert_encoding($str, $to_encoding, $from_encoding, $default_charset)
24{
25 // Allows mbstring functions only with iso-8859-*, utf-8 and
26 // iso-2022-jp (Japanese)
27 // koi8-r and gb2312 can be added only in php 4.3+
ac62eb21 28 if ( stristr($default_charset, 'iso-8859-') ||
29 stristr($default_charset, 'utf-8') ||
30 stristr($default_charset, 'iso-2022-jp') ) {
abaa3d33 31 if (function_exists('mb_convert_encoding')) {
c41245c6 32 return mb_convert_encoding($str, $to_encoding, $from_encoding);
abaa3d33 33 }
34 }
35 return '';
36}
37
334a77f8 38function imap_utf7_encode_local($s) {
e842b215 39 global $languages, $squirrelmail_language;
40
41 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
42 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
43 return $languages[$squirrelmail_language]['XTRA_CODE']('utf7-imap_encode', $s);
44 }
8b35c78e 45
abaa3d33 46 if ($s == '') //If empty, don't bother
47 return '';
8b35c78e 48
abaa3d33 49 global $default_charset;
02d0931e 50 set_my_charset(); //must be called before using $default_charset
51 if ((strtolower($default_charset) != 'iso-8859-1') && ($default_charset != '')) {
abaa3d33 52 $utf7_s = sqimap_mb_convert_encoding($s, 'UTF7-IMAP', $default_charset, $default_charset);
53 if ($utf7_s != '')
54 return $utf7_s;
8b35c78e 55 }
56
57 // Later code works only for ISO-8859-1
e842b215 58
334a77f8 59 $b64_s = ''; // buffer for substring to be base64-encoded
60 $utf7_s = ''; // imap-utf7-encoded string
61 for ($i = 0; $i < strlen($s); $i++) {
62 $c = $s[$i];
63 $ord_c = ord($c);
64 if ((($ord_c >= 0x20) and ($ord_c <= 0x25)) or
65 (($ord_c >= 0x27) and ($ord_c <= 0x7e))) {
66 if ($b64_s) {
67 $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) .'-';
68 $b64_s = '';
69 }
70 $utf7_s = $utf7_s . $c;
71 } elseif ($ord_c == 0x26) {
72 if ($b64_s) {
73 $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) . '-';
74 $b64_s = '';
75 }
76 $utf7_s = $utf7_s . '&-';
77 } else {
78 $b64_s = $b64_s . chr(0) . $c;
79 }
80 }
81 //
82 // flush buffer
83 //
84 if ($b64_s) {
85 $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) . '-';
86 $b64_s = '';
87 }
88 return $utf7_s;
89}
90
91function imap_utf7_decode_local($s) {
e842b215 92 global $languages, $squirrelmail_language;
93
94 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
95 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
96 return $languages[$squirrelmail_language]['XTRA_CODE']('utf7-imap_decode', $s);
97 }
8b35c78e 98
abaa3d33 99 if ($s == '') //If empty, don't bother
100 return '';
8b35c78e 101
abaa3d33 102 global $default_charset;
dacf28e3 103 set_my_charset(); //must be called before using $default_charset
104 if ((strtolower($default_charset) != 'iso-8859-1') && ($default_charset != '')) {
abaa3d33 105 $utf7_s = sqimap_mb_convert_encoding($s, $default_charset, 'UTF7-IMAP', $default_charset);
106 if ($utf7_s != '')
107 return $utf7_s;
108 }
8b35c78e 109
110 // Later code works only for ISO-8859-1
e842b215 111
334a77f8 112 $b64_s = '';
113 $iso_8859_1_s = '';
114 for ($i = 0, $len = strlen($s); $i < $len; $i++) {
115 $c = $s[$i];
116 if (strlen($b64_s) > 0) {
117 if ($c == '-') {
118 if ($b64_s == '&') {
119 $iso_8859_1_s = $iso_8859_1_s . '&';
120 } else {
121 $iso_8859_1_s = $iso_8859_1_s .
122 decodeBASE64(substr($b64_s, 1));
123 }
124 $b64_s = '';
125 } else {
126 $b64_s = $b64_s . $c;
127 }
128 } else {
129 if ($c == '&') {
130 $b64_s = '&';
131 } else {
132 $iso_8859_1_s = $iso_8859_1_s . $c;
133 }
134 }
135 }
136 return $iso_8859_1_s;
137}
138
139function encodeBASE64($s) {
140 $B64Chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,';
141 $p = 0; // phase: 1 / 2 / 3 / 1 / 2 / 3...
142 $e = ''; // base64-encoded string
143 //foreach($s as $c) {
144 for ($i = 0; $i < strlen($s); $i++) {
145 $c = $s[$i];
146 if ($p == 0) {
147 $e = $e . substr($B64Chars, ((ord($c) & 252) >> 2), 1);
148 $t = (ord($c) & 3);
149 $p = 1;
150 } elseif ($p == 1) {
151 $e = $e . $B64Chars[($t << 4) + ((ord($c) & 240) >> 4)];
152 $t = (ord($c) & 15);
153 $p = 2;
154 } elseif ($p == 2) {
155 $e = $e . $B64Chars[($t << 2) + ((ord($c) & 192) >> 6)];
156 $e = $e . $B64Chars[ord($c) & 63];
157 $p = 0;
158 }
159 }
160 //
161 // flush buffer
162 //
163 if ($p == 1) {
164 $e = $e . $B64Chars[$t << 4];
165 } elseif ($p == 2) {
166 $e = $e . $B64Chars[$t << 2];
167 }
168 return $e;
169}
170
171function decodeBASE64($s) {
172 $B64Values = array(
173 'A' => 0, 'B' => 1, 'C' => 2, 'D' => 3, 'E' => 4, 'F' => 5,
174 'G' => 6, 'H' => 7, 'I' => 8, 'J' => 9, 'K' => 10, 'L' => 11,
175 'M' => 12, 'N' => 13, 'O' => 14, 'P' => 15, 'Q' => 16, 'R' => 17,
176 'S' => 18, 'T' => 19, 'U' => 20, 'V' => 21, 'W' => 22, 'X' => 23,
177 'Y' => 24, 'Z' => 25,
178 'a' => 26, 'b' => 27, 'c' => 28, 'd' => 29, 'e' => 30, 'f' => 31,
179 'g' => 32, 'h' => 33, 'i' => 34, 'j' => 35, 'k' => 36, 'l' => 37,
180 'm' => 38, 'n' => 39, 'o' => 40, 'p' => 41, 'q' => 42, 'r' => 43,
181 's' => 44, 't' => 45, 'u' => 46, 'v' => 47, 'w' => 48, 'x' => 49,
182 'y' => 50, 'z' => 51,
183 '0' => 52, '1' => 53, '2' => 54, '3' => 55, '4' => 56, '5' => 57,
184 '6' => 58, '7' => 59, '8' => 60, '9' => 61, '+' => 62, ',' => 63
185 );
186 $p = 0;
187 $d = '';
188 $unicodeNullByteToggle = 0;
189 for ($i = 0, $len = strlen($s); $i < $len; $i++) {
190 $c = $s[$i];
191 if ($p == 0) {
192 $t = $B64Values[$c];
193 $p = 1;
194 } elseif ($p == 1) {
195 if ($unicodeNullByteToggle) {
196 $d = $d . chr(($t << 2) + (($B64Values[$c] & 48) >> 4));
197 $unicodeNullByteToggle = 0;
198 } else {
199 $unicodeNullByteToggle = 1;
200 }
201 $t = ($B64Values[$c] & 15);
202 $p = 2;
203 } elseif ($p == 2) {
204 if ($unicodeNullByteToggle) {
205 $d = $d . chr(($t << 4) + (($B64Values[$c] & 60) >> 2));
206 $unicodeNullByteToggle = 0;
207 } else {
208 $unicodeNullByteToggle = 1;
209 }
210 $t = ($B64Values[$c] & 3);
211 $p = 3;
212 } elseif ($p == 3) {
213 if ($unicodeNullByteToggle) {
214 $d = $d . chr(($t << 6) + $B64Values[$c]);
215 $unicodeNullByteToggle = 0;
216 } else {
217 $unicodeNullByteToggle = 1;
218 }
219 $t = ($B64Values[$c] & 3);
220 $p = 0;
221 }
222 }
223 return $d;
224}
225
d6c32258 226?>