/**
* Specifies all escape sequences that are valid following any of the
* escape characters. Each escape sequence may be greater than one
* character in length and may be specified by a REGEX-string - look-behind
* assertions on such regexes are not supported.
* @param Mixed Array of strings or single string.
*/
function setCharactersToEscape(array $chars)
{
static $re_starter_c = 'REGEX';
static $re_starter_len_c = 5;
$this->_charsToEscape = array();
/* Save a little time and processing by anchoring all regexes now,
* rather than each time geshi_whichsubstr() is called.
*/
foreach ($chars as $escSeq) {
if (strncmp($escSeq, $re_starter_c, $re_starter_len_c) == 0) {
$re = substr($escSeq, $re_starter_len_c);
$re = geshi_anchor_re($re);
$this->_charsToEscape[] = $re_starter_c . $re;
} else {
$this->_charsToEscape[] = $escSeq;
}
}
}
function geshi_whichsubstr($str, $substrs, $offset = 0, $flags = 0)
{
/* Constants */
static $re_starter_c = 'REGEX';
static $re_starter_len_c = 5;
$ret = null;
$max_len = -1;
foreach ($substrs as $substr) {
if ($flags & GESHI_WHICHSS_TRYREGEX && strncmp($substr, $re_starter_c, $re_starter_len_c) == 0) {
$re = substr($substr, $re_starter_len_c);
if (!($flags & GESHI_WHICHSS_SKIPANCHORINSERT)) {
$re = geshi_anchor_re($re);
}
$haystack = $offset > 0 ? substr($str, $offset) : $str;
$match = preg_match($re, $haystack, $matches, PREG_OFFSET_CAPTURE) ? $matches[0][0] : null;
$len = strlen($match);
/* This code is reached only if GESHI_WHICHSS_SKIPANCHORINSERT was
* specified without a pre-existing anchor and with a match that
* started beyond $offset.
*/
if ($match !== null && $matches[0][1]) {
$len = $match = null;
}
} else {
$len = strlen($substr);
if (!($flags & GESHI_WHICHSS_CASEINSENSITIVE)) {
$match = substr($str, $offset, $len) == $substr ? $substr : null;
} else {
if (strcasecmp(substr($str, $offset, $len), $substr) == 0) {
$match = $substr;
} else {
$match = null;
}
}
}
if ($match !== null) {
if (!($flags & GESHI_WHICHSS_MAXIMAL)) {
$ret = $match;
break;
} else {
if ($len > $max_len) {
$ret = $match;
$max_len = $len;
}
}
}
}
return $ret;
}
