user's user's id :)
[squirrelmail.git] / functions / strings.php
CommitLineData
59177427 1<?php
7350889b 2
f1ca21bd 3/**
35586184 4 * strings.php
5 *
6c84ba1e 6 * Copyright (c) 1999-2005 The SquirrelMail Project Team
35586184 7 * Licensed under the GNU GPL. For full terms see the file COPYING.
8 *
9 * This code provides various string manipulation functions that are
598294a7 10 * used by the rest of the SquirrelMail code.
35586184 11 *
31841a9e 12 * @version $Id$
d6c32258 13 * @package squirrelmail
35586184 14 */
9374671f 15
35586184 16/**
17 * SquirrelMail version number -- DO NOT CHANGE
18 */
19global $version;
509fc585 20$version = '1.5.1 [CVS]';
d068c0ec 21
f1ca21bd 22/**
97bdc607 23 * SquirrelMail internal version number -- DO NOT CHANGE
24 * $sm_internal_version = array (release, major, minor)
25 */
0567e4d5 26global $SQM_INTERNAL_VERSION;
a959e855 27$SQM_INTERNAL_VERSION = array(1,5,1);
87d8c725 28
87d8c725 29/**
30 * There can be a circular issue with includes, where the $version string is
31 * referenced by the include of global.php, etc. before it's defined.
32 * For that reason, bring in global.php AFTER we define the version strings.
33 */
34require_once(SM_PATH . 'functions/global.php');
97bdc607 35
66239b65 36/**
c9d61baf 37 * Appends citation markers to the string.
38 * Also appends a trailing space.
39 *
40 * @author Justus Pendleton
41 *
42 * @param string str The string to append to
43 * @param int citeLevel the number of markers to append
44 * @return null
45 */
46function sqMakeCite (&$str, $citeLevel) {
47 for ($i = 0; $i < $citeLevel; $i++) {
48 $str .= '>';
49 }
50 if ($citeLevel != 0) {
51 $str .= ' ';
52 }
53}
54
55/**
56 * Create a newline in the string, adding citation
57 * markers to the newline as necessary.
58 *
59 * @author Justus Pendleton
60 *
61 * @param string str the string to make a newline in
62 * @param int citeLevel the citation level the newline is at
63 * @param int column starting column of the newline
64 * @return null
65 */
66function sqMakeNewLine (&$str, $citeLevel, &$column) {
67 $str .= "\n";
68 $column = 0;
69 if ($citeLevel > 0) {
70 sqMakeCite ($str, $citeLevel);
71 $column = $citeLevel + 1;
72 } else {
73 $column = 0;
74 }
75}
76
77/**
5e7ae713 78 * Checks for spaces in strings - only used if PHP doesn't have native ctype support
79 *
80 * @author Tomas Kuliavas
326727cf 81 *
82 * You might be able to rewrite the function by adding short evaluation form.
5e7ae713 83 *
84 * possible problems:
85 * - iso-2022-xx charsets - hex 20 might be part of other symbol. I might
86 * be wrong. 0x20 is not used in iso-2022-jp. I haven't checked iso-2022-kr
87 * and iso-2022-cn mappings.
88 *
89 * - no-break space (&nbsp;) - it is 8bit symbol, that depends on charset.
90 * there are at least three different charset groups that have nbsp in
91 * different places.
92 *
93 * I don't see any charset/nbsp options in php ctype either.
94 *
95 * @param string $string tested string
326727cf 96 * @return bool true when only whitespace symbols are present in test string
5e7ae713 97 */
98function sm_ctype_space($string) {
c7aff938 99 if ( preg_match('/^[\x09-\x0D]|^\x20/', $string) || $string=='') {
100 return true;
101 } else {
102 return false;
103 }
5e7ae713 104}
105
106/**
c9d61baf 107 * Wraps text at $wrap characters. While sqWordWrap takes
108 * a single line of text and wraps it, this function works
109 * on the entire corpus at once, this allows it to be a little
110 * bit smarter and when and how to wrap.
111 *
112 * @author Justus Pendleton
113 *
114 * @param string body the entire body of text
115 * @param int wrap the maximum line length
116 * @return string the wrapped text
117 */
118function &sqBodyWrap (&$body, $wrap) {
5e7ae713 119 //check for ctype support, and fake it if it doesn't exist
120 if (!function_exists('ctype_space')) {
121 function ctype_space ($string) {
122 return sm_ctype_space($string);
123 }
124 }
125
c9d61baf 126 // the newly wrapped text
127 $outString = '';
128 // current column since the last newline in the outstring
129 $outStringCol = 0;
130 $length = strlen($body);
131 // where we are in the original string
132 $pos = 0;
133 // the number of >>> citation markers we are currently at
134 $citeLevel = 0;
135
136 // the main loop, whenever we start a newline of input text
137 // we start from here
138 while ($pos < $length) {
139 // we're at the beginning of a line, get the new cite level
140 $newCiteLevel = 0;
141
142 while (($pos < $length) && ($body{$pos} == '>')) {
143 $newCiteLevel++;
144 $pos++;
145
146 // skip over any spaces interleaved among the cite markers
147 while (($pos < $length) && ($body{$pos} == ' ')) {
bb977394 148
c9d61baf 149 $pos++;
bb977394 150
c9d61baf 151 }
152 if ($pos >= $length) {
153 break;
154 }
155 }
156
157 // special case: if this is a blank line then maintain it
158 // (i.e. try to preserve original paragraph breaks)
159 // unless they occur at the very beginning of the text
6eaf5320 160 if (($body{$pos} == "\n" ) && (strlen($outString) != 0)) {
c9d61baf 161 $outStringLast = $outString{strlen($outString) - 1};
162 if ($outStringLast != "\n") {
163 $outString .= "\n";
164 }
165 sqMakeCite ($outString, $newCiteLevel);
166 $outString .= "\n";
167 $pos++;
168 $outStringCol = 0;
169 continue;
170 }
171
172 // if the cite level has changed, then start a new line
173 // with the new cite level.
174 if (($citeLevel != $newCiteLevel) && ($pos > ($newCiteLevel + 1)) && ($outStringCol != 0)) {
175 sqMakeNewLine ($outString, 0, $outStringCol);
176 }
177
178 $citeLevel = $newCiteLevel;
179
180 // prepend the quote level if necessary
181 if ($outStringCol == 0) {
182 sqMakeCite ($outString, $citeLevel);
183 // if we added a citation then move the column
184 // out by citelevel + 1 (the cite markers + the space)
185 $outStringCol = $citeLevel + ($citeLevel ? 1 : 0);
186 } else if ($outStringCol > $citeLevel) {
187 // not a cite and we're not at the beginning of a line
188 // in the output. add a space to separate the new text
189 // from previous text.
190 $outString .= ' ';
191 $outStringCol++;
192 }
193
194 // find the next newline -- we don't want to go further than that
195 $nextNewline = strpos ($body, "\n", $pos);
196 if ($nextNewline === FALSE) {
197 $nextNewline = $length;
198 }
199
200 // Don't wrap unquoted lines at all. For now the textarea
201 // will work fine for this. Maybe revisit this later though
202 // (for completeness more than anything else, I think)
203 if ($citeLevel == 0) {
204 $outString .= substr ($body, $pos, ($nextNewline - $pos));
205 $outStringCol = $nextNewline - $pos;
206 if ($nextNewline != $length) {
207 sqMakeNewLine ($outString, 0, $outStringCol);
208 }
209 $pos = $nextNewline + 1;
210 continue;
211 }
bb977394 212 /**
213 * Set this to false to stop appending short strings to previous lines
214 */
215 $smartwrap = true;
c9d61baf 216 // inner loop, (obviously) handles wrapping up to
217 // the next newline
218 while ($pos < $nextNewline) {
219 // skip over initial spaces
220 while (($pos < $nextNewline) && (ctype_space ($body{$pos}))) {
221 $pos++;
222 }
c9d61baf 223 // if this is a short line then just append it and continue outer loop
6eaf5320 224 if (($outStringCol + $nextNewline - $pos) <= ($wrap - $citeLevel - 1) ) {
c9d61baf 225 // if this is the final line in the input string then include
226 // any trailing newlines
6eaf5320 227 // echo substr($body,$pos,$wrap). "<br />";
c9d61baf 228 if (($nextNewline + 1 == $length) && ($body{$nextNewline} == "\n")) {
229 $nextNewline++;
230 }
231
bb977394 232 // trim trailing spaces
233 $lastRealChar = $nextNewline;
234 while (($lastRealChar > $pos && $lastRealChar < $length) && (ctype_space ($body{$lastRealChar}))) {
235 $lastRealChar--;
236 }
bb977394 237 // decide if appending the short string is what we want
238 if (($nextNewline < $length && $body{$nextNewline} == "\n") &&
239 isset($lastRealChar)) {
be86a35a 240 $mypos = $pos;
241 //check the first word:
bb977394 242 while (($mypos < $length) && ($body{$mypos} == '>')) {
243 $mypos++;
244 // skip over any spaces interleaved among the cite markers
245 while (($mypos < $length) && ($body{$mypos} == ' ')) {
6eaf5320 246 $mypos++;
bb977394 247 }
248 }
249/*
250 $ldnspacecnt = 0;
251 if ($mypos == $nextNewline+1) {
252 while (($mypos < $length) && ($body{$mypos} == ' ')) {
253 $ldnspacecnt++;
6eaf5320 254 }
bb977394 255 }
256*/
257
258 $firstword = substr($body,$mypos,strpos($body,' ',$mypos) - $mypos);
bb977394 259 //if ($dowrap || $ldnspacecnt > 1 || ($firstword && (
260 if (!$smartwrap || $firstword && (
261 $firstword{0} == '-' ||
6eaf5320 262 $firstword{0} == '+' ||
263 $firstword{0} == '*' ||
bb977394 264 $firstword{0} == strtoupper($firstword{0}) ||
6eaf5320 265 strpos($firstword,':'))) {
bb977394 266 $outString .= substr($body,$pos,($lastRealChar - $pos+1));
267 $outStringCol += ($lastRealChar - $pos);
268 sqMakeNewLine($outString,$citeLevel,$outStringCol);
269 $nextNewline++;
270 $pos = $nextNewline;
271 $outStringCol--;
272 continue;
273 }
6eaf5320 274
c9d61baf 275 }
bb977394 276
c9d61baf 277 $outString .= substr ($body, $pos, ($lastRealChar - $pos + 1));
278 $outStringCol += ($lastRealChar - $pos);
279 $pos = $nextNewline + 1;
280 continue;
281 }
bb977394 282
c9d61baf 283 $eol = $pos + $wrap - $citeLevel - $outStringCol;
284 // eol is the tentative end of line.
285 // look backwards for there for a whitespace to break at.
286 // if it's already less than our current position then
287 // our current line is already too long, break immediately
288 // and restart outer loop
289 if ($eol <= $pos) {
6eaf5320 290 sqMakeNewLine ($outString, $citeLevel, $outStringCol);
c9d61baf 291 continue;
292 }
293
294 // start looking backwards for whitespace to break at.
295 $breakPoint = $eol;
296 while (($breakPoint > $pos) && (! ctype_space ($body{$breakPoint}))) {
297 $breakPoint--;
298 }
299
300 // if we didn't find a breakpoint by looking backward then we
301 // need to figure out what to do about that
302 if ($breakPoint == $pos) {
303 // if we are not at the beginning then end this line
304 // and start a new loop
305 if ($outStringCol > ($citeLevel + 1)) {
306 sqMakeNewLine ($outString, $citeLevel, $outStringCol);
307 continue;
308 } else {
309 // just hard break here. most likely we are breaking
310 // a really long URL. could also try searching
311 // forward for a break point, which is what Mozilla
312 // does. don't bother for now.
313 $breakPoint = $eol;
314 }
315 }
316
317 // special case: maybe we should have wrapped last
318 // time. if the first breakpoint here makes the
319 // current line too long and there is already text on
320 // the current line, break and loop again if at
321 // beginning of current line, don't force break
322 $SLOP = 6;
323 if ((($outStringCol + ($breakPoint - $pos)) > ($wrap + $SLOP)) && ($outStringCol > ($citeLevel + 1))) {
324 sqMakeNewLine ($outString, $citeLevel, $outStringCol);
325 continue;
326 }
327
328 // skip newlines or whitespace at the beginning of the string
329 $substring = substr ($body, $pos, ($breakPoint - $pos));
330 $substring = rtrim ($substring); // do rtrim and ctype_space have the same ideas about whitespace?
331 $outString .= $substring;
332 $outStringCol += strlen ($substring);
333 // advance past the whitespace which caused the wrap
334 $pos = $breakPoint;
335 while (($pos < $length) && (ctype_space ($body{$pos}))) {
336 $pos++;
337 }
338 if ($pos < $length) {
339 sqMakeNewLine ($outString, $citeLevel, $outStringCol);
340 }
341 }
342 }
343
344 return $outString;
345}
346
347/**
5cc0b70e 348 * Wraps text at $wrap characters
349 *
350 * Has a problem with special HTML characters, so call this before
351 * you do character translation.
352 *
c7aff938 353 * Specifically, &#039; comes up as 5 characters instead of 1.
5cc0b70e 354 * This should not add newlines to the end of lines.
8b096f0a 355 *
356 * @param string line the line of text to wrap, by ref
357 * @param int wrap the maximum line lenth
c7aff938 358 * @param string charset name of charset used in $line string. Available since v.1.5.1.
8b096f0a 359 * @return void
5cc0b70e 360 */
c7aff938 361function sqWordWrap(&$line, $wrap, $charset='') {
e842b215 362 global $languages, $squirrelmail_language;
363
364 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
1b45fe31 365 function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_wordwrap')) {
e842b215 366 if (mb_detect_encoding($line) != 'ASCII') {
1b45fe31 367 $line = call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_wordwrap', $line, $wrap);
e842b215 368 return;
369 }
370 }
371
5cc0b70e 372 ereg("^([\t >]*)([^\t >].*)?$", $line, $regs);
373 $beginning_spaces = $regs[1];
374 if (isset($regs[2])) {
375 $words = explode(' ', $regs[2]);
376 } else {
377 $words = '';
378 }
f1ca21bd 379
5cc0b70e 380 $i = 0;
381 $line = $beginning_spaces;
f1ca21bd 382
5cc0b70e 383 while ($i < count($words)) {
384 /* Force one word to be on a line (minimum) */
385 $line .= $words[$i];
c7aff938 386 $line_len = strlen($beginning_spaces) + sq_strlen($words[$i],$charset) + 2;
5cc0b70e 387 if (isset($words[$i + 1]))
c7aff938 388 $line_len += sq_strlen($words[$i + 1],$charset);
5cc0b70e 389 $i ++;
f1ca21bd 390
5cc0b70e 391 /* Add more words (as long as they fit) */
392 while ($line_len < $wrap && $i < count($words)) {
393 $line .= ' ' . $words[$i];
394 $i++;
395 if (isset($words[$i]))
c7aff938 396 $line_len += sq_strlen($words[$i],$charset) + 1;
5cc0b70e 397 else
398 $line_len += 1;
399 }
f1ca21bd 400
5cc0b70e 401 /* Skip spaces if they are the first thing on a continued line */
402 while (!isset($words[$i]) && $i < count($words)) {
403 $i ++;
404 }
f1ca21bd 405
5cc0b70e 406 /* Go to the next line if we have more to process */
407 if ($i < count($words)) {
e0858036 408 $line .= "\n";
5cc0b70e 409 }
410 }
411}
412
413/**
341abbd6 414 * Does the opposite of sqWordWrap()
8b096f0a 415 * @param string body the text to un-wordwrap
416 * @return void
341abbd6 417 */
418function sqUnWordWrap(&$body) {
e842b215 419 global $squirrelmail_language;
f1ca21bd 420
e842b215 421 if ($squirrelmail_language == 'ja_JP') {
422 return;
423 }
424
341abbd6 425 $lines = explode("\n", $body);
426 $body = '';
427 $PreviousSpaces = '';
428 $cnt = count($lines);
429 for ($i = 0; $i < $cnt; $i ++) {
430 preg_match("/^([\t >]*)([^\t >].*)?$/", $lines[$i], $regs);
431 $CurrentSpaces = $regs[1];
432 if (isset($regs[2])) {
433 $CurrentRest = $regs[2];
1e4a4feb 434 } else {
f1ca21bd 435 $CurrentRest = '';
436 }
437
341abbd6 438 if ($i == 0) {
439 $PreviousSpaces = $CurrentSpaces;
440 $body = $lines[$i];
441 } else if (($PreviousSpaces == $CurrentSpaces) /* Do the beginnings match */
442 && (strlen($lines[$i - 1]) > 65) /* Over 65 characters long */
443 && strlen($CurrentRest)) { /* and there's a line to continue with */
444 $body .= ' ' . $CurrentRest;
445 } else {
446 $body .= "\n" . $lines[$i];
447 $PreviousSpaces = $CurrentSpaces;
448 }
449 }
450 $body .= "\n";
451}
452
453/**
66239b65 454 * If $haystack is a full mailbox name and $needle is the mailbox
455 * separator character, returns the last part of the mailbox name.
8b096f0a 456 *
457 * @param string haystack full mailbox name to search
458 * @param string needle the mailbox separator character
459 * @return string the last part of the mailbox name
66239b65 460 */
461function readShortMailboxName($haystack, $needle) {
97b1248c 462
66239b65 463 if ($needle == '') {
97b1248c 464 $elem = $haystack;
465 } else {
f1ca21bd 466 $parts = explode($needle, $haystack);
467 $elem = array_pop($parts);
468 while ($elem == '' && count($parts)) {
469 $elem = array_pop($parts);
470 }
66239b65 471 }
97b1248c 472 return( $elem );
66239b65 473}
3302d0d4 474
8b096f0a 475/**
4445e6b3 476 * php_self
477 *
8b096f0a 478 * Creates an URL for the page calling this function, using either the PHP global
479 * REQUEST_URI, or the PHP global PHP_SELF with QUERY_STRING added.
480 *
481 * @return string the complete url for this page
482 */
43fdb2a4 483function php_self () {
961ca3d8 484 if ( sqgetGlobalVar('REQUEST_URI', $req_uri, SQ_SERVER) && !empty($req_uri) ) {
485 return $req_uri;
43fdb2a4 486 }
f1ca21bd 487
961ca3d8 488 if ( sqgetGlobalVar('PHP_SELF', $php_self, SQ_SERVER) && !empty($php_self) ) {
f72f61d8 489
490 // need to add query string to end of PHP_SELF to match REQUEST_URI
491 //
492 if ( sqgetGlobalVar('QUERY_STRING', $query_string, SQ_SERVER) && !empty($query_string) ) {
493 $php_self .= '?' . $query_string;
494 }
495
961ca3d8 496 return $php_self;
f1ca21bd 497 }
498
961ca3d8 499 return '';
43fdb2a4 500}
501
502
66239b65 503/**
4445e6b3 504 * get_location
505 *
8b096f0a 506 * Determines the location to forward to, relative to your server.
507 * This is used in HTTP Location: redirects.
66239b65 508 * If this doesnt work correctly for you (although it should), you can
8b096f0a 509 * remove all this code except the last two lines, and have it return
510 * the right URL for your site, something like:
511 *
512 * http://www.example.com/squirrelmail/
66239b65 513 *
8b096f0a 514 * @return string the base url for this SquirrelMail installation
66239b65 515 */
516function get_location () {
f1ca21bd 517
961ca3d8 518 global $imap_server_type;
238703be 519
4deb32f1 520 /* Get the path, handle virtual directories */
f1ca21bd 521 if(strpos(php_self(), '?')) {
522 $path = substr(php_self(), 0, strpos(php_self(), '?'));
523 } else {
524 $path = php_self();
525 }
526 $path = substr($path, 0, strrpos($path, '/'));
238703be 527 if ( sqgetGlobalVar('sq_base_url', $full_url, SQ_SESSION) ) {
528 return $full_url . $path;
529 }
530
66239b65 531 /* Check if this is a HTTPS or regular HTTP request. */
532 $proto = 'http://';
f1ca21bd 533
66239b65 534 /*
535 * If you have 'SSLOptions +StdEnvVars' in your apache config
44827b4d 536 * OR if you have HTTPS=on in your HTTP_SERVER_VARS
66239b65 537 * OR if you are on port 443
538 */
539 $getEnvVar = getenv('HTTPS');
540 if ((isset($getEnvVar) && !strcasecmp($getEnvVar, 'on')) ||
961ca3d8 541 (sqgetGlobalVar('HTTPS', $https_on, SQ_SERVER) && !strcasecmp($https_on, 'on')) ||
542 (sqgetGlobalVar('SERVER_PORT', $server_port, SQ_SERVER) && $server_port == 443)) {
8a549df2 543 $proto = 'https://';
66239b65 544 }
f1ca21bd 545
4deb32f1 546 /* Get the hostname from the Host header or server config. */
961ca3d8 547 if ( !sqgetGlobalVar('HTTP_HOST', $host, SQ_SERVER) || empty($host) ) {
548 if ( !sqgetGlobalVar('SERVER_NAME', $host, SQ_SERVER) || empty($host) ) {
549 $host = '';
550 }
66239b65 551 }
f1ca21bd 552
66239b65 553 $port = '';
554 if (! strstr($host, ':')) {
961ca3d8 555 if (sqgetGlobalVar('SERVER_PORT', $server_port, SQ_SERVER)) {
f1ca21bd 556 if (($server_port != 80 && $proto == 'http://') ||
961ca3d8 557 ($server_port != 443 && $proto == 'https://')) {
558 $port = sprintf(':%d', $server_port);
66239b65 559 }
560 }
561 }
f1ca21bd 562
8de7f698 563 /* this is a workaround for the weird macosx caching that
564 causes Apache to return 16080 as the port number, which causes
565 SM to bail */
f1ca21bd 566
8de7f698 567 if ($imap_server_type == 'macosx' && $port == ':16080') {
568 $port = '';
569 }
f1ca21bd 570
238703be 571 /* Fallback is to omit the server name and use a relative */
572 /* URI, although this is not RFC 2616 compliant. */
573 $full_url = ($host ? $proto . $host . $port : '');
574 sqsession_register($full_url, 'sq_base_url');
575 return $full_url . $path;
66239b65 576}
dcaf2a49 577
9374671f 578
66239b65 579/**
4445e6b3 580 * Encrypts password
581 *
8b096f0a 582 * These functions are used to encrypt the password before it is
583 * stored in a cookie. The encryption key is generated by
584 * OneTimePadCreate();
585 *
586 * @param string string the (password)string to encrypt
587 * @param string epad the encryption key
588 * @return string the base64-encoded encrypted password
66239b65 589 */
590function OneTimePadEncrypt ($string, $epad) {
591 $pad = base64_decode($epad);
592 $encrypted = '';
593 for ($i = 0; $i < strlen ($string); $i++) {
594 $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
595 }
f1ca21bd 596
66239b65 597 return base64_encode($encrypted);
598}
599
8b096f0a 600/**
4445e6b3 601 * Decrypts a password from the cookie
602 *
603 * Decrypts a password from the cookie, encrypted by OneTimePadEncrypt.
8b096f0a 604 * This uses the encryption key that is stored in the session.
605 *
606 * @param string string the string to decrypt
607 * @param string epad the encryption key from the session
608 * @return string the decrypted password
609 */
66239b65 610function OneTimePadDecrypt ($string, $epad) {
611 $pad = base64_decode($epad);
612 $encrypted = base64_decode ($string);
613 $decrypted = '';
614 for ($i = 0; $i < strlen ($encrypted); $i++) {
615 $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
616 }
f1ca21bd 617
66239b65 618 return $decrypted;
619}
9374671f 620
9374671f 621
66239b65 622/**
4445e6b3 623 * Randomizes the mt_rand() function.
624 *
c9d61baf 625 * Toss this in strings or integers and it will seed the generator
626 * appropriately. With strings, it is better to get them long.
4445e6b3 627 * Use md5() to lengthen smaller strings.
8b096f0a 628 *
629 * @param mixed val a value to seed the random number generator
630 * @return void
66239b65 631 */
632function sq_mt_seed($Val) {
4deb32f1 633 /* if mt_getrandmax() does not return a 2^n - 1 number,
634 this might not work well. This uses $Max as a bitmask. */
66239b65 635 $Max = mt_getrandmax();
f1ca21bd 636
66239b65 637 if (! is_int($Val)) {
66239b65 638 $Val = crc32($Val);
66239b65 639 }
f1ca21bd 640
66239b65 641 if ($Val < 0) {
642 $Val *= -1;
643 }
f1ca21bd 644
8d2155e5 645 if ($Val == 0) {
66239b65 646 return;
647 }
f1ca21bd 648
66239b65 649 mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
650}
9374671f 651
9374671f 652
66239b65 653/**
4445e6b3 654 * Init random number generator
655 *
66239b65 656 * This function initializes the random number generator fairly well.
657 * It also only initializes it once, so you don't accidentally get
658 * the same 'random' numbers twice in one session.
8b096f0a 659 *
660 * @return void
66239b65 661 */
662function sq_mt_randomize() {
66239b65 663 static $randomized;
f1ca21bd 664
66239b65 665 if ($randomized) {
666 return;
667 }
f1ca21bd 668
66239b65 669 /* Global. */
961ca3d8 670 sqgetGlobalVar('REMOTE_PORT', $remote_port, SQ_SERVER);
671 sqgetGlobalVar('REMOTE_ADDR', $remote_addr, SQ_SERVER);
66239b65 672 sq_mt_seed((int)((double) microtime() * 1000000));
961ca3d8 673 sq_mt_seed(md5($remote_port . $remote_addr . getmypid()));
f1ca21bd 674
66239b65 675 /* getrusage */
676 if (function_exists('getrusage')) {
4deb32f1 677 /* Avoid warnings with Win32 */
66239b65 678 $dat = @getrusage();
679 if (isset($dat) && is_array($dat)) {
821a8e9c 680 $Str = '';
681 foreach ($dat as $k => $v)
66239b65 682 {
683 $Str .= $k . $v;
684 }
821a8e9c 685 sq_mt_seed(md5($Str));
66239b65 686 }
687 }
f1ca21bd 688
961ca3d8 689 if(sqgetGlobalVar('UNIQUE_ID', $unique_id, SQ_SERVER)) {
690 sq_mt_seed(md5($unique_id));
0b97a708 691 }
f1ca21bd 692
66239b65 693 $randomized = 1;
694}
695
8b096f0a 696/**
4445e6b3 697 * Creates encryption key
698 *
8b096f0a 699 * Creates an encryption key for encrypting the password stored in the cookie.
700 * The encryption key itself is stored in the session.
701 *
702 * @param int length optional, length of the string to generate
703 * @return string the encryption key
704 */
66239b65 705function OneTimePadCreate ($length=100) {
706 sq_mt_randomize();
f1ca21bd 707
66239b65 708 $pad = '';
709 for ($i = 0; $i < $length; $i++) {
710 $pad .= chr(mt_rand(0,255));
711 }
f1ca21bd 712
66239b65 713 return base64_encode($pad);
714}
9374671f 715
66239b65 716/**
8b096f0a 717 * Returns a string showing the size of the message/attachment.
718 *
719 * @param int bytes the filesize in bytes
720 * @return string the filesize in human readable format
66239b65 721 */
722function show_readable_size($bytes) {
723 $bytes /= 1024;
724 $type = 'k';
f1ca21bd 725
66239b65 726 if ($bytes / 1024 > 1) {
727 $bytes /= 1024;
e5f1e71c 728 $type = 'M';
66239b65 729 }
f1ca21bd 730
66239b65 731 if ($bytes < 10) {
732 $bytes *= 10;
733 settype($bytes, 'integer');
734 $bytes /= 10;
735 } else {
736 settype($bytes, 'integer');
737 }
f1ca21bd 738
66239b65 739 return $bytes . '<small>&nbsp;' . $type . '</small>';
740}
9374671f 741
66239b65 742/**
c7aff938 743 * Generates a random string from the character set you pass in
66239b65 744 *
8b096f0a 745 * @param int size the size of the string to generate
746 * @param string chars a string containing the characters to use
747 * @param int flags a flag to add a specific set to the characters to use:
748 * Flags:
749 * 1 = add lowercase a-z to $chars
750 * 2 = add uppercase A-Z to $chars
751 * 4 = add numbers 0-9 to $chars
752 * @return string the random string
66239b65 753 */
66239b65 754function GenerateRandomString($size, $chars, $flags = 0) {
755 if ($flags & 0x1) {
756 $chars .= 'abcdefghijklmnopqrstuvwxyz';
757 }
758 if ($flags & 0x2) {
759 $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
760 }
761 if ($flags & 0x4) {
762 $chars .= '0123456789';
763 }
f1ca21bd 764
66239b65 765 if (($size < 1) || (strlen($chars) < 1)) {
766 return '';
767 }
ff4f08ff 768
4deb32f1 769 sq_mt_randomize(); /* Initialize the random number generator */
ff4f08ff 770
4deb32f1 771 $String = '';
ff4f08ff 772 $j = strlen( $chars ) - 1;
66239b65 773 while (strlen($String) < $size) {
ff4f08ff 774 $String .= $chars{mt_rand(0, $j)};
66239b65 775 }
ff4f08ff 776
66239b65 777 return $String;
778}
9374671f 779
8b096f0a 780/**
781 * Escapes special characters for use in IMAP commands.
4445e6b3 782 *
8b096f0a 783 * @param string the string to escape
784 * @return string the escaped string
785 */
fbb76d0e 786function quoteimap($str) {
ab1df059 787 return preg_replace("/([\"\\\\])/", "\\\\$1", $str);
66239b65 788}
1899535f 789
66239b65 790/**
4445e6b3 791 * Trims array
792 *
8b096f0a 793 * Trims every element in the array, ie. remove the first char of each element
794 * @param array array the array to trim
66239b65 795 */
796function TrimArray(&$array) {
797 foreach ($array as $k => $v) {
798 global $$k;
799 if (is_array($$k)) {
800 foreach ($$k as $k2 => $v2) {
801 $$k[$k2] = substr($v2, 1);
23d6bd09 802 }
66239b65 803 } else {
804 $$k = substr($v, 1);
23d6bd09 805 }
f1ca21bd 806
4deb32f1 807 /* Re-assign back to array. */
66239b65 808 $array[$k] = $$k;
809 }
f1ca21bd 810}
23d6bd09 811
8b096f0a 812/**
4445e6b3 813 * Create compose link
814 *
8b096f0a 815 * Returns a link to the compose-page, taking in consideration
816 * the compose_in_new and javascript settings.
817 * @param string url the URL to the compose page
818 * @param string text the link text, default "Compose"
819 * @return string a link to the compose page
820 */
21a957a9 821function makeComposeLink($url, $text = null, $target='')
d62c4938 822{
823 global $compose_new_win,$javascript_on;
824
825 if(!$text) {
826 $text = _("Compose");
827 }
828
f72f61d8 829
c9d61baf 830 // if not using "compose in new window", make
f72f61d8 831 // regular link and be done with it
d62c4938 832 if($compose_new_win != '1') {
21a957a9 833 return makeInternalLink($url, $text, $target);
d62c4938 834 }
835
f72f61d8 836
c9d61baf 837 // build the compose in new window link...
f72f61d8 838
839
c435f076 840 // if javascript is on, use onclick event to handle it
d62c4938 841 if($javascript_on) {
842 sqgetGlobalVar('base_uri', $base_uri, SQ_SESSION);
843 return '<a href="javascript:void(0)" onclick="comp_in_new(\''.$base_uri.$url.'\')">'. $text.'</a>';
844 }
845
f72f61d8 846
847 // otherwise, just open new window using regular HTML
d62c4938 848 return makeInternalLink($url, $text, '_blank');
f72f61d8 849
d62c4938 850}
851
f1ca21bd 852/**
4445e6b3 853 * Print variable
854 *
8b096f0a 855 * sm_print_r($some_variable, [$some_other_variable [, ...]]);
4445e6b3 856 *
8b096f0a 857 * Debugging function - does the same as print_r, but makes sure special
858 * characters are converted to htmlentities first. This will allow
859 * values like <some@email.address> to be displayed.
4445e6b3 860 * The output is wrapped in <<pre>> and <</pre>> tags.
8b096f0a 861 *
862 * @return void
863 */
7fe09a30 864function sm_print_r() {
50cc40fe 865 ob_start(); // Buffer output
7fe09a30 866 foreach(func_get_args() as $var) {
867 print_r($var);
868 echo "\n";
869 }
50cc40fe 870 $buffer = ob_get_contents(); // Grab the print_r output
871 ob_end_clean(); // Silently discard the output & stop buffering
f1ca21bd 872 print '<pre>';
50cc40fe 873 print htmlentities($buffer);
f1ca21bd 874 print '</pre>';
50cc40fe 875}
876
3ecad5e6 877/**
878 * version of fwrite which checks for failure
879 */
880function sq_fwrite($fp, $string) {
c9d61baf 881 // write to file
882 $count = @fwrite($fp,$string);
883 // the number of bytes written should be the length of the string
884 if($count != strlen($string)) {
885 return FALSE;
886 }
887
888 return $count;
3ecad5e6 889}
890
36e1180b 891/**
892 * sq_get_html_translation_table
893 *
894 * Returns the translation table used by sq_htmlentities()
895 *
896 * @param integer $table html translation table. Possible values (without quotes):
deb22cec 897 * <ul>
898 * <li>HTML_ENTITIES - full html entities table defined by charset</li>
899 * <li>HTML_SPECIALCHARS - html special characters table</li>
900 * </ul>
36e1180b 901 * @param integer $quote_style quote encoding style. Possible values (without quotes):
c9d61baf 902 * <ul>
deb22cec 903 * <li>ENT_COMPAT - (default) encode double quotes</li>
904 * <li>ENT_NOQUOTES - don't encode double or single quotes</li>
905 * <li>ENT_QUOTES - encode double and single quotes</li>
c9d61baf 906 * </ul>
36e1180b 907 * @param string $charset charset used for encoding. default to us-ascii, 'auto' uses $default_charset global value.
908 * @return array html translation array
909 */
910function sq_get_html_translation_table($table,$quote_style=ENT_COMPAT,$charset='us-ascii') {
911 global $default_charset;
912
913 if ($table == HTML_SPECIALCHARS) $charset='us-ascii';
914
915 // Start array with ampersand
916 $sq_html_ent_table = array( "&" => '&amp;' );
917
918 // < and >
919 $sq_html_ent_table = array_merge($sq_html_ent_table,
c9d61baf 920 array("<" => '&lt;',
921 ">" => '&gt;')
922 );
36e1180b 923 // double quotes
924 if ($quote_style == ENT_COMPAT)
925 $sq_html_ent_table = array_merge($sq_html_ent_table,
c9d61baf 926 array("\"" => '&quot;')
927 );
36e1180b 928
929 // double and single quotes
930 if ($quote_style == ENT_QUOTES)
931 $sq_html_ent_table = array_merge($sq_html_ent_table,
c9d61baf 932 array("\"" => '&quot;',
933 "'" => '&#39;')
934 );
36e1180b 935
936 if ($charset=='auto') $charset=$default_charset;
937
938 // add entities that depend on charset
939 switch($charset){
940 case 'iso-8859-1':
941 include_once(SM_PATH . 'functions/htmlentities/iso-8859-1.php');
942 break;
943 case 'utf-8':
944 include_once(SM_PATH . 'functions/htmlentities/utf-8.php');
945 break;
946 case 'us-ascii':
947 default:
948 break;
949 }
950 // return table
951 return $sq_html_ent_table;
952}
953
954/**
955 * sq_htmlentities
956 *
957 * Convert all applicable characters to HTML entities.
958 * Minimal php requirement - v.4.0.5
959 *
960 * @param string $string string that has to be sanitized
961 * @param integer $quote_style quote encoding style. Possible values (without quotes):
c9d61baf 962 * <ul>
deb22cec 963 * <li>ENT_COMPAT - (default) encode double quotes</li>
964 * <li>ENT_NOQUOTES - don't encode double or single quotes</li>
965 * <li>ENT_QUOTES - encode double and single quotes</li>
c9d61baf 966 * </ul>
36e1180b 967 * @param string $charset charset used for encoding. defaults to 'us-ascii', 'auto' uses $default_charset global value.
968 * @return string sanitized string
969 */
970function sq_htmlentities($string,$quote_style=ENT_COMPAT,$charset='us-ascii') {
971 // get translation table
972 $sq_html_ent_table=sq_get_html_translation_table(HTML_ENTITIES,$quote_style,$charset);
973 // convert characters
974 return str_replace(array_keys($sq_html_ent_table),array_values($sq_html_ent_table),$string);
975}
976
b54acf3f 977/**
978 * Tests if string contains 8bit symbols.
979 *
980 * If charset is not set, function defaults to default_charset.
91e0dccc 981 * $default_charset global must be set correctly if $charset is
b54acf3f 982 * not used.
983 * @param string $string tested string
984 * @param string $charset charset used in a string
985 * @return bool true if 8bit symbols are detected
986 * @since 1.5.1
987 */
988function sq_is8bit($string,$charset='') {
989 global $default_charset;
990
991 if ($charset=='') $charset=$default_charset;
992
993 /**
994 * Don't use \240 in ranges. Sometimes RH 7.2 doesn't like it.
91e0dccc 995 * Don't use \200-\237 for iso-8859-x charsets. This ranges
b54acf3f 996 * stores control symbols in those charsets.
997 * Use preg_match instead of ereg in order to avoid problems
998 * with mbstring overloading
999 */
1000 if (preg_match("/^iso-8859/i",$charset)) {
1001 $needle='/\240|[\241-\377]/';
1002 } else {
1003 $needle='/[\200-\237]|\240|[\241-\377]/';
1004 }
1005 return preg_match("$needle",$string);
1006}
1007
1008/**
1009 * Replacement of mb_list_encodings function
1010 *
1011 * This function provides replacement for function that is available only
1012 * in php 5.x. Function does not test all mbstring encodings. Only the ones
1013 * that might be used in SM translations.
1014 *
91e0dccc 1015 * Supported arrays are stored in session in order to reduce number of
b54acf3f 1016 * mb_internal_encoding function calls.
1017 *
91e0dccc 1018 * If you want to test all mbstring encodings - fill $list_of_encodings
b54acf3f 1019 * array.
1020 * @return array list of encodings supported by mbstring
1021 * @since 1.5.1
1022 */
1023function sq_mb_list_encodings() {
1024 if (! function_exists('mb_internal_encoding'))
1025 return array();
1026
1027 // don't try to test encodings, if they are already stored in session
1028 if (sqgetGlobalVar('mb_supported_encodings',$mb_supported_encodings,SQ_SESSION))
1029 return $mb_supported_encodings;
1030
1031 // save original encoding
1032 $orig_encoding=mb_internal_encoding();
1033
1034 $list_of_encoding=array(
1035 'pass',
1036 'auto',
1037 'ascii',
1038 'jis',
1039 'utf-8',
1040 'sjis',
1041 'euc-jp',
1042 'iso-8859-1',
1043 'iso-8859-2',
1044 'iso-8859-7',
1045 'iso-8859-9',
1046 'iso-8859-15',
1047 'koi8-r',
1048 'koi8-u',
1049 'big5',
1050 'gb2312',
1051 'windows-1251',
1052 'windows-1255',
1053 'windows-1256',
1054 'tis-620',
1055 'iso-2022-jp',
1056 'euc-kr',
1057 'utf7-imap');
1058
1059 $supported_encodings=array();
1060
1061 foreach ($list_of_encoding as $encoding) {
1062 // try setting encodings. suppress warning messages
1063 if (@mb_internal_encoding($encoding))
1064 $supported_encodings[]=$encoding;
1065 }
1066
1067 // restore original encoding
1068 mb_internal_encoding($orig_encoding);
1069
1070 // register list in session
1071 sqsession_register($supported_encodings,'mb_supported_encodings');
1072
1073 return $supported_encodings;
1074}
1075
c7aff938 1076/**
1077 * Function returns number of characters in string.
1078 *
1079 * Returned number might be different from number of bytes in string,
1080 * if $charset is multibyte charset. Currently only utf-8 charset is
1081 * supported.
1082 * @param string $str string
1083 * @param string $charset charset
1084 * @since 1.5.1
1085 * @return integer number of characters in string
1086 */
1087function sq_strlen($str, $charset=''){
1088 // default option
1089 if ($charset=='') return strlen($str);
1090
1091 // use automatic charset detection, if function call asks for it
1092 if ($charset=='auto') {
1093 global $default_charset;
1094 set_my_charset();
1095 $charset=$default_charset;
1096 }
1097
1098 // lowercase charset name
1099 $charset=strtolower($charset);
1100
1101 // set initial returned length number
1102 $real_length=0;
1103
1104 // calculate string length according to charset
1105 // function can be modulized same way we modulize decode/encode/htmlentities
1106 if ($charset=='utf-8') {
1107 if (function_exists('mb_strlen')) {
1108 $real_length = mb_strlen($str,'utf-8');
1109 } else {
1110 // function needs length of string in bytes.
1111 // mbstring overloading might break it
1112 $str_length=strlen($str);
1113 $str_index=0;
1114 while ($str_index < $str_length) {
1115 // start of utf-8 multibyte character detection
1116 if (preg_match("/[\xC0-\xDF]/",$str[$str_index]) &&
1117 isset($str[$str_index+1]) &&
1118 preg_match("/[\x80-\xBF]/",$str[$str_index+1])) {
1119 // two byte utf-8
1120 $str_index=$str_index+2;
1121 $real_length++;
1122 } elseif (preg_match("/[\xE0-\xEF]/",$str[$str_index]) &&
1123 isset($str[$str_index+2]) &&
1124 preg_match("/[\x80-\xBF][\x80-\xBF]/",$str[$str_index+1].$str[$str_index+2])) {
1125 // three byte utf-8
1126 $str_index=$str_index+3;
1127 $real_length++;
1128 } elseif (preg_match("/[\xF0-\xF7]/",$str[$str_index]) &&
1129 isset($str[$str_index+3]) &&
1130 preg_match("/[\x80-\xBF][\x80-\xBF][\x80-\xBF]/",$str[$str_index+1].$str[$str_index+2].$str[$str_index+3])) {
1131 // four byte utf-8
1132 $str_index=$str_index+4;
1133 $real_length++;
1134 } elseif (preg_match("/[\xF8-\xFB]/",$str[$str_index]) &&
1135 isset($str[$str_index+4]) &&
1136 preg_match("/[\x80-\xBF][\x80-\xBF][\x80-\xBF][\x80-\xBF]/",
1137 $str[$str_index+1].$str[$str_index+2].$str[$str_index+3].$str[$str_index+4])) {
1138 // five byte utf-8
1139 $str_index=$str_index+5;
1140 $real_length++;
1141 } elseif (preg_match("/[\xFC-\xFD]/",$str[$str_index]) &&
1142 isset($str[$str_index+5]) &&
1143 preg_match("/[\x80-\xBF][\x80-\xBF][\x80-\xBF][\x80-\xBF]/",
1144 $str[$str_index+1].$str[$str_index+2].$str[$str_index+3].$str[$str_index+4].$str[$str_index+5])) {
1145 // six byte utf-8
1146 $str_index=$str_index+6;
1147 $real_length++;
1148 } else {
1149 $str_index++;
1150 $real_length++;
1151 }
1152 // end of utf-8 multibyte character detection
1153 }
1154 }
1155 // end of utf-8 length detection
1156 } elseif ($charset=='big5') {
1157 // TODO: add big5 string length detection
1158 $real_length=strlen($str);
1159 } elseif ($charset=='gb2312') {
1160 // TODO: add gb2312 string length detection
1161 $real_length=strlen($str);
1162 } elseif ($charset=='gb18030') {
1163 // TODO: add gb18030 string length detection
1164 $real_length=strlen($str);
1165 } elseif ($charset=='euc-jp') {
1166 // TODO: add euc-jp string length detection
1167 $real_length=strlen($str);
1168 } elseif ($charset=='euc-cn') {
1169 // TODO: add euc-cn string length detection
1170 $real_length=strlen($str);
1171 } elseif ($charset=='euc-tw') {
1172 // TODO: add euc-tw string length detection
1173 $real_length=strlen($str);
1174 } elseif ($charset=='euc-kr') {
1175 // TODO: add euc-kr string length detection
1176 $real_length=strlen($str);
1177 } else {
1178 $real_length=strlen($str);
1179 }
1180 return $real_length;
1181}
1182
43fdb2a4 1183$PHP_SELF = php_self();
4445e6b3 1184?>