Merge utf7_decode_local and utf7_encode_local into one file.
[squirrelmail.git] / functions / imap_utf7_local.php
CommitLineData
334a77f8 1<?php
2
3/**
4 * imap_general.php
5 *
6 * Copyright (c) 1999-2002 The SquirrelMail Project Team
7 * Licensed under the GNU GPL. For full terms see the file COPYING.
8 *
9 * This implements all functions that do general imap functions.
10 *
11 * $Id $
12 */
13
14function imap_utf7_encode_local($s) {
15 $b64_s = ''; // buffer for substring to be base64-encoded
16 $utf7_s = ''; // imap-utf7-encoded string
17 for ($i = 0; $i < strlen($s); $i++) {
18 $c = $s[$i];
19 $ord_c = ord($c);
20 if ((($ord_c >= 0x20) and ($ord_c <= 0x25)) or
21 (($ord_c >= 0x27) and ($ord_c <= 0x7e))) {
22 if ($b64_s) {
23 $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) .'-';
24 $b64_s = '';
25 }
26 $utf7_s = $utf7_s . $c;
27 } elseif ($ord_c == 0x26) {
28 if ($b64_s) {
29 $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) . '-';
30 $b64_s = '';
31 }
32 $utf7_s = $utf7_s . '&-';
33 } else {
34 $b64_s = $b64_s . chr(0) . $c;
35 }
36 }
37 //
38 // flush buffer
39 //
40 if ($b64_s) {
41 $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) . '-';
42 $b64_s = '';
43 }
44 return $utf7_s;
45}
46
47function imap_utf7_decode_local($s) {
48 $b64_s = '';
49 $iso_8859_1_s = '';
50 for ($i = 0, $len = strlen($s); $i < $len; $i++) {
51 $c = $s[$i];
52 if (strlen($b64_s) > 0) {
53 if ($c == '-') {
54 if ($b64_s == '&') {
55 $iso_8859_1_s = $iso_8859_1_s . '&';
56 } else {
57 $iso_8859_1_s = $iso_8859_1_s .
58 decodeBASE64(substr($b64_s, 1));
59 }
60 $b64_s = '';
61 } else {
62 $b64_s = $b64_s . $c;
63 }
64 } else {
65 if ($c == '&') {
66 $b64_s = '&';
67 } else {
68 $iso_8859_1_s = $iso_8859_1_s . $c;
69 }
70 }
71 }
72 return $iso_8859_1_s;
73}
74
75function encodeBASE64($s) {
76 $B64Chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,';
77 $p = 0; // phase: 1 / 2 / 3 / 1 / 2 / 3...
78 $e = ''; // base64-encoded string
79 //foreach($s as $c) {
80 for ($i = 0; $i < strlen($s); $i++) {
81 $c = $s[$i];
82 if ($p == 0) {
83 $e = $e . substr($B64Chars, ((ord($c) & 252) >> 2), 1);
84 $t = (ord($c) & 3);
85 $p = 1;
86 } elseif ($p == 1) {
87 $e = $e . $B64Chars[($t << 4) + ((ord($c) & 240) >> 4)];
88 $t = (ord($c) & 15);
89 $p = 2;
90 } elseif ($p == 2) {
91 $e = $e . $B64Chars[($t << 2) + ((ord($c) & 192) >> 6)];
92 $e = $e . $B64Chars[ord($c) & 63];
93 $p = 0;
94 }
95 }
96 //
97 // flush buffer
98 //
99 if ($p == 1) {
100 $e = $e . $B64Chars[$t << 4];
101 } elseif ($p == 2) {
102 $e = $e . $B64Chars[$t << 2];
103 }
104 return $e;
105}
106
107function decodeBASE64($s) {
108 $B64Values = array(
109 'A' => 0, 'B' => 1, 'C' => 2, 'D' => 3, 'E' => 4, 'F' => 5,
110 'G' => 6, 'H' => 7, 'I' => 8, 'J' => 9, 'K' => 10, 'L' => 11,
111 'M' => 12, 'N' => 13, 'O' => 14, 'P' => 15, 'Q' => 16, 'R' => 17,
112 'S' => 18, 'T' => 19, 'U' => 20, 'V' => 21, 'W' => 22, 'X' => 23,
113 'Y' => 24, 'Z' => 25,
114 'a' => 26, 'b' => 27, 'c' => 28, 'd' => 29, 'e' => 30, 'f' => 31,
115 'g' => 32, 'h' => 33, 'i' => 34, 'j' => 35, 'k' => 36, 'l' => 37,
116 'm' => 38, 'n' => 39, 'o' => 40, 'p' => 41, 'q' => 42, 'r' => 43,
117 's' => 44, 't' => 45, 'u' => 46, 'v' => 47, 'w' => 48, 'x' => 49,
118 'y' => 50, 'z' => 51,
119 '0' => 52, '1' => 53, '2' => 54, '3' => 55, '4' => 56, '5' => 57,
120 '6' => 58, '7' => 59, '8' => 60, '9' => 61, '+' => 62, ',' => 63
121 );
122 $p = 0;
123 $d = '';
124 $unicodeNullByteToggle = 0;
125 for ($i = 0, $len = strlen($s); $i < $len; $i++) {
126 $c = $s[$i];
127 if ($p == 0) {
128 $t = $B64Values[$c];
129 $p = 1;
130 } elseif ($p == 1) {
131 if ($unicodeNullByteToggle) {
132 $d = $d . chr(($t << 2) + (($B64Values[$c] & 48) >> 4));
133 $unicodeNullByteToggle = 0;
134 } else {
135 $unicodeNullByteToggle = 1;
136 }
137 $t = ($B64Values[$c] & 15);
138 $p = 2;
139 } elseif ($p == 2) {
140 if ($unicodeNullByteToggle) {
141 $d = $d . chr(($t << 4) + (($B64Values[$c] & 60) >> 2));
142 $unicodeNullByteToggle = 0;
143 } else {
144 $unicodeNullByteToggle = 1;
145 }
146 $t = ($B64Values[$c] & 3);
147 $p = 3;
148 } elseif ($p == 3) {
149 if ($unicodeNullByteToggle) {
150 $d = $d . chr(($t << 6) + $B64Values[$c]);
151 $unicodeNullByteToggle = 0;
152 } else {
153 $unicodeNullByteToggle = 1;
154 }
155 $t = ($B64Values[$c] & 3);
156 $p = 0;
157 }
158 }
159 return $d;
160}
161
162?>