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<?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.
*
* @package phpMyAdmin-StringType-Native
*/
/**
* Checks if a character is an alphanumeric one
*
* @uses PMA_STR_isUpper()
* @uses PMA_STR_isLower()
* @uses PMA_STR_isDigit()
* @param string character to check for
* @return boolean whether the character is an alphanumeric one or not
*/
function PMA_STR_isAlnum($c)
{
return (PMA_STR_isUpper($c) || PMA_STR_isLower($c) || PMA_STR_isDigit($c));
} // end of the "PMA_STR_isAlnum()" function
/**
* Checks if a character is an alphabetic one
*
* @uses PMA_STR_isUpper()
* @uses PMA_STR_isLower()
* @param string character to check for
* @return boolean whether the character is an alphabetic one or not
*/
function PMA_STR_isAlpha($c)
{
return (PMA_STR_isUpper($c) || PMA_STR_isLower($c));
} // end of the "PMA_STR_isAlpha()" function
/**
* Checks if a character is a digit
*
* @uses PMA_STR_numberInRangeInclusive()
* @uses ord()
* @param string character to check for
* @return boolean whether the character is a digit or not
*/
function PMA_STR_isDigit($c)
{
$ord_zero = 48; //ord('0');
$ord_nine = 57; //ord('9');
$ord_c = ord($c);
return PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine);
} // end of the "PMA_STR_isDigit()" function
/**
* Checks if a character is an upper alphabetic one
*
* @uses PMA_STR_numberInRangeInclusive()
* @uses ord()
* @param string character to check for
* @return boolean whether the character is an upper alphabetic one or not
*/
function PMA_STR_isUpper($c)
{
$ord_zero = 65; //ord('A');
$ord_nine = 90; //ord('Z');
$ord_c = ord($c);
return PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine);
} // end of the "PMA_STR_isUpper()" function
/**
* Checks if a character is a lower alphabetic one
*
* @uses PMA_STR_numberInRangeInclusive()
* @uses ord()
* @param string character to check for
* @return boolean whether the character is a lower alphabetic one or not
*/
function PMA_STR_isLower($c)
{
$ord_zero = 97; //ord('a');
$ord_nine = 122; //ord('z');
$ord_c = ord($c);
return PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine);
} // end of the "PMA_STR_isLower()" function
/**
* Checks if a character is a space one
*
* @uses PMA_STR_numberInRangeInclusive()
* @uses ord()
* @param string character to check for
* @return boolean whether the character is a space one or not
*/
function PMA_STR_isSpace($c)
{
$ord_space = 32; //ord(' ')
$ord_tab = 9; //ord('\t')
$ord_CR = 13; //ord('\n')
$ord_NOBR = 160; //ord('U+00A0);
$ord_c = ord($c);
return ($ord_c == $ord_space
|| $ord_c == $ord_NOBR
|| PMA_STR_numberInRangeInclusive($ord_c, $ord_tab, $ord_CR));
} // end of the "PMA_STR_isSpace()" function
/**
* Checks if a character is an hexadecimal digit
*
* @uses PMA_STR_numberInRangeInclusive()
* @uses ord()
* @param string character to check for
* @return boolean whether the character is an hexadecimal digit or not
*/
function PMA_STR_isHexDigit($c)
{
$ord_Aupper = 65; //ord('A');
$ord_Fupper = 70; //ord('F');
$ord_Alower = 97; //ord('a');
$ord_Flower = 102; //ord('f');
$ord_zero = 48; //ord('0');
$ord_nine = 57; //ord('9');
$ord_c = ord($c);
return (PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine)
|| PMA_STR_numberInRangeInclusive($ord_c, $ord_Aupper, $ord_Fupper)
|| PMA_STR_numberInRangeInclusive($ord_c, $ord_Alower, $ord_Flower));
} // end of the "PMA_STR_isHexDigit()" function
?>
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