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https://github.com/cytopia/devilbox.git
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102 lines
2.7 KiB
PHP
102 lines
2.7 KiB
PHP
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<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* Specialized String Functions for phpMyAdmin
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*
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* Defines a set of function callbacks that have a pure C version available if
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* the "ctype" extension is available, but otherwise have PHP versions to use
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* (that are slower).
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*
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* The SQL Parser code relies heavily on these functions.
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*
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* @todo a .lib filename should not have code in main(), split or rename file
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* @package PhpMyAdmin-String
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*/
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if (! defined('PHPMYADMIN')) {
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exit;
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}
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/**
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* Load proper code for handling input.
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*/
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if (@function_exists('mb_strlen')) {
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mb_internal_encoding('utf-8');
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include './libraries/string_mb.lib.php';
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} else {
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include './libraries/string_native.lib.php';
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}
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/**
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* Load ctype handler.
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*/
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if (@extension_loaded('ctype')) {
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include './libraries/string_type_ctype.lib.php';
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} else {
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include './libraries/string_type_native.lib.php';
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}
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/**
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* Checks if a given character position in the string is escaped or not
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*
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* @param string $string string to check for
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* @param integer $pos the character to check for
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* @param integer $start starting position in the string
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*
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* @return boolean whether the character is escaped or not
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*/
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function PMA_STR_charIsEscaped($string, $pos, $start = 0)
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{
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$pos = max(intval($pos), 0);
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$start = max(intval($start), 0);
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$len = PMA_strlen($string);
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// Base case:
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// Check for string length or invalid input or special case of input
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// (pos == $start)
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if ($pos <= $start || $len <= max($pos, $start)) {
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return false;
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}
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$pos--;
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$escaped = false;
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while ($pos >= $start && PMA_substr($string, $pos, 1) == '\\') {
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$escaped = !$escaped;
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$pos--;
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} // end while
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return $escaped;
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} // end of the "PMA_STR_charIsEscaped()" function
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/**
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* Checks if a number is in a range
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*
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* @param integer $num number to check for
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* @param integer $lower lower bound
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* @param integer $upper upper bound
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*
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* @return boolean whether the number is in the range or not
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*/
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function PMA_STR_numberInRangeInclusive($num, $lower, $upper)
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{
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return ($num >= $lower && $num <= $upper);
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} // end of the "PMA_STR_numberInRangeInclusive()" function
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/**
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* Checks if a character is an SQL identifier
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*
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* @param string $c character to check for
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* @param boolean $dot_is_valid whether the dot character is valid or not
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*
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* @return boolean whether the character is an SQL identifier or not
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*/
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function PMA_STR_isSqlIdentifier($c, $dot_is_valid = false)
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{
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return (PMA_STR_isAlnum($c)
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|| ($ord_c = ord($c)) && $ord_c >= 192 && $ord_c != 215 && $ord_c != 249
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|| $c == '_'
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|| $c == '$'
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|| ($dot_is_valid != false && $c == '.'));
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} // end of the "PMA_STR_isSqlIdentifier()" function
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?>
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