Viewing file:  string.lib.php (6.51 KB) -rw-rw-rw-
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Specialized String Functions for phpMyAdmin
*
* Copyright 2002 Robin Johnson <robbat2@users.sourceforge.net>
* http://www.orbis-terrarum.net/?l=people.robbat2
*
* Defines a set of function callbacks that have a pure C version available if
* the "ctype" extension is available, but otherwise have PHP versions to use
* (that are slower).
*
* The SQL Parser code relies heavily on these functions.
*
* @version $Id: string.lib.php 10293 2007-04-17 11:53:36Z cybot_tm $
* @uses PMA_PHP_INT_VERSION
* @uses PMA_dl()
* @uses extension_loaded()
* @uses substr()
* @uses function_exists()
* @uses mb_internal_encoding()
* @uses defined()
* @todo a .lib filename should not have code in main(), split or rename file
*/
/* Try to load mbstring, unless we're using buggy php version */
if (PMA_PHP_INT_VERSION != 40203) {
if (!@extension_loaded('mbstring')) {
PMA_dl('mbstring');
}
}
/**
* windows-* and tis-620 are not supported and are not multibyte,
* others can be ignored as they're not multibyte
*
* @global boolean $GLOBALS['using_mb_charset']
*/
$GLOBALS['using_mb_charset'] =
substr($GLOBALS['charset'], 0, 8) != 'windows-' &&
substr($GLOBALS['charset'], 0, 9) != 'iso-8859-' &&
substr($GLOBALS['charset'], 0, 3) != 'cp-' &&
$GLOBALS['charset'] != 'koi8-r' &&
$GLOBALS['charset'] != 'tis-620';
$GLOBALS['PMA_allow_mbstr'] = @function_exists('mb_strlen') && $GLOBALS['using_mb_charset'];
if ($GLOBALS['PMA_allow_mbstr']) {
// the hebrew lang file uses iso-8859-8-i, encoded RTL,
// but mb_internal_encoding only supports iso-8859-8
if ($GLOBALS['charset'] == 'iso-8859-8-i'){
mb_internal_encoding('iso-8859-8');
} else {
mb_internal_encoding($GLOBALS['charset']);
}
}
// This is for handling input better
if (defined('PMA_MULTIBYTE_ENCODING') || $GLOBALS['PMA_allow_mbstr']) {
$GLOBALS['PMA_strpos'] = 'mb_strpos';
require './libraries/string_mb.lib.php';
} else {
$GLOBALS['PMA_strpos'] = 'strpos';
require './libraries/string_native.lib.php';
}
if (!@extension_loaded('ctype')) {
PMA_dl('ctype');
}
if (@extension_loaded('ctype')) {
require './libraries/string_type_ctype.lib.php';
} else {
require './libraries/string_type_native.lib.php';
}
/**
* This checks if a string actually exists inside another string
* We try to do it in a PHP3-portable way.
* We don't care about the position it is in.
*
* @uses PMA_STR_pos()
* @param string string to search for
* @param string string to search in
* @return boolean whether the needle is in the haystack or not
* @todo rename PMA_STR_inStr()
*/
function PMA_STR_strInStr($needle, $haystack)
{
// PMA_STR_pos($haystack, $needle) !== false
// return (is_integer(PMA_STR_pos($haystack, $needle)));
return (bool) PMA_STR_pos(' ' . $haystack, $needle);
} // end of the "PMA_STR_strInStr()" function
/**
* Checks if a given character position in the string is escaped or not
*
* @uses PMA_strlen()
* @uses PMA_substr()
* @uses max()
* @uses intval()
* @param string string to check for
* @param integer the character to check for
* @param integer starting position in the string
* @return boolean whether the character is escaped or not
*/
function PMA_STR_charIsEscaped($string, $pos, $start = 0)
{
$pos = max(intval($pos), 0);
$start = max(intval($start), 0);
$len = PMA_strlen($string);
// Base case:
// Check for string length or invalid input or special case of input
// (pos == $start)
if ($pos <= $start || $len <= max($pos, $start)) {
return false;
}
$pos--;
$escaped = false;
while ($pos >= $start && PMA_substr($string, $pos, 1) == '\\') {
$escaped = !$escaped;
$pos--;
} // end while
return $escaped;
} // end of the "PMA_STR_charIsEscaped()" function
/**
* Checks if a number is in a range
*
* @param integer number to check for
* @param integer lower bound
* @param integer upper bound
* @return boolean whether the number is in the range or not
*/
function PMA_STR_numberInRangeInclusive($num, $lower, $upper)
{
return ($num >= $lower && $num <= $upper);
} // end of the "PMA_STR_numberInRangeInclusive()" function
/**
* Checks if a character is an accented character
*
* Presently this only works for some character sets. More work may be needed
* to fix it.
*
* @uses PMA_STR_numberInRangeInclusive()
* @uses ord()
* @param string character to check for
* @return boolean whether the character is an accented one or not
*/
function PMA_STR_isAccented($c)
{
$ord_min1 = 192; //ord('A');
$ord_max1 = 214; //ord('Z');
$ord_min2 = 216; //ord('A');
$ord_max2 = 246; //ord('Z');
$ord_min3 = 248; //ord('A');
$ord_max3 = 255; //ord('Z');
$ord_c = ord($c);
return PMA_STR_numberInRangeInclusive($ord_c, $ord_min1, $ord_max1)
|| PMA_STR_numberInRangeInclusive($ord_c, $ord_min2, $ord_max2)
|| PMA_STR_numberInRangeInclusive($ord_c, $ord_min2, $ord_max2);
} // end of the "PMA_STR_isAccented()" function
/**
* Checks if a character is an SQL identifier
*
* @uses PMA_STR_isAlnum()
* @uses PMA_STR_isAccented()
* @param string character to check for
* @param boolean whether the dot character is valid or not
* @return boolean whether the character is an SQL identifier or not
*/
function PMA_STR_isSqlIdentifier($c, $dot_is_valid = false)
{
return (PMA_STR_isAlnum($c)
|| PMA_STR_isAccented($c)
|| $c == '_'
|| $c == '$'
|| ($dot_is_valid != false && $c == '.'));
} // end of the "PMA_STR_isSqlIdentifier()" function
/**
* Binary search of a value in a sorted array
*
* $arr MUST be sorted, due to binary search
*
* @param string string to search for
* @param array sorted array to search into
* @param integer size of sorted array to search into
*
* @return boolean whether the string has been found or not
*/
function PMA_STR_binarySearchInArr($str, $arr, $arrsize)
{
$top = $arrsize - 1;
$bottom = 0;
$found = false;
while ($top >= $bottom && $found == false) {
$mid = intval(($top + $bottom) / 2);
$res = strcmp($str, $arr[$mid]);
if ($res == 0) {
$found = true;
} elseif ($res < 0) {
$top = $mid - 1;
} else {
$bottom = $mid + 1;
}
} // end while
return $found;
} // end of the "PMA_STR_binarySearchInArr()" function
?>
|