phpmyadmin/libraries/string_type_native.lib.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * Specialized String Functions for phpMyAdmin
   5  *
   6  * Defines a set of function callbacks that have a pure C version available if
   7  * the "ctype" extension is available, but otherwise have PHP versions to use
   8  * (that are slower).
   9  *
  10  * The SQL Parser code relies heavily on these functions.
  11  *
  12  * @package    PhpMyAdmin-String
  13  * @subpackage Native
  14  */
  15 if (! defined('PHPMYADMIN')) {
  16     exit;
  17 }
  18
  19 /**
  20  * Checks if a character is an alphanumeric one
  21  *
  22  * @param string $c character to check for
  23  *
  24  * @return boolean whether the character is an alphanumeric one or not
  25  */
  26 function PMA_STR_isAlnum($c)
  27 {
  28     return (PMA_STR_isUpper($c) || PMA_STR_isLower($c) || PMA_STR_isDigit($c));
  29 } // end of the "PMA_STR_isAlnum()" function
  30
  31 /**
  32  * Checks if a character is an alphabetic one
  33  *
  34  * @param string $c character to check for
  35  *
  36  * @return boolean whether the character is an alphabetic one or not
  37  */
  38 function PMA_STR_isAlpha($c)
  39 {
  40     return (PMA_STR_isUpper($c) || PMA_STR_isLower($c));
  41 } // end of the "PMA_STR_isAlpha()" function
  42
  43 /**
  44  * Checks if a character is a digit
  45  *
  46  * @param string $c character to check for
  47  *
  48  * @return boolean whether the character is a digit or not
  49  */
  50 function PMA_STR_isDigit($c)
  51 {
  52     $ord_zero = 48; //ord('0');
  53     $ord_nine = 57; //ord('9');
  54     $ord_c    = ord($c);
  55
  56     return PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine);
  57 } // end of the "PMA_STR_isDigit()" function
  58
  59 /**
  60  * Checks if a character is an upper alphabetic one
  61  *
  62  * @param string $c character to check for
  63  *
  64  * @return boolean whether the character is an upper alphabetic one or not
  65  */
  66 function PMA_STR_isUpper($c)
  67 {
  68     $ord_zero = 65; //ord('A');
  69     $ord_nine = 90; //ord('Z');
  70     $ord_c    = ord($c);
  71
  72     return PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine);
  73 } // end of the "PMA_STR_isUpper()" function
  74
  75 /**
  76  * Checks if a character is a lower alphabetic one
  77  *
  78  * @param string $c character to check for
  79  *
  80  * @return boolean whether the character is a lower alphabetic one or not
  81  */
  82 function PMA_STR_isLower($c)
  83 {
  84     $ord_zero = 97;  //ord('a');
  85     $ord_nine = 122; //ord('z');
  86     $ord_c    = ord($c);
  87
  88     return PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine);
  89 } // end of the "PMA_STR_isLower()" function
  90
  91 /**
  92  * Checks if a character is a space one
  93  *
  94  * @param string $c character to check for
  95  *
  96  * @return boolean whether the character is a space one or not
  97  */
  98 function PMA_STR_isSpace($c)
  99 {
 100     $ord_space = 32;    //ord(' ')
 101     $ord_tab   = 9;     //ord('\t')
 102     $ord_CR    = 13;    //ord('\n')
 103     $ord_NOBR  = 160;   //ord('U+00A0);
 104     $ord_c     = ord($c);
 105
 106     return ($ord_c == $ord_space
 107         || $ord_c == $ord_NOBR
 108         || PMA_STR_numberInRangeInclusive($ord_c, $ord_tab, $ord_CR));
 109 } // end of the "PMA_STR_isSpace()" function
 110
 111 /**
 112  * Checks if a character is an hexadecimal digit
 113  *
 114  * @param string $c character to check for
 115  *
 116  * @return boolean whether the character is an hexadecimal digit or not
 117  */
 118 function PMA_STR_isHexDigit($c)
 119 {
 120     $ord_Aupper = 65;  //ord('A');
 121     $ord_Fupper = 70;  //ord('F');
 122     $ord_Alower = 97;  //ord('a');
 123     $ord_Flower = 102; //ord('f');
 124     $ord_zero   = 48;  //ord('0');
 125     $ord_nine   = 57;  //ord('9');
 126     $ord_c      = ord($c);
 127
 128     return (PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine)
 129         || PMA_STR_numberInRangeInclusive($ord_c, $ord_Aupper, $ord_Fupper)
 130         || PMA_STR_numberInRangeInclusive($ord_c, $ord_Alower, $ord_Flower));
 131 } // end of the "PMA_STR_isHexDigit()" function
 132
 133 ?>