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  * Copyright 2002 Robin Johnson <robbat2@users.sourceforge.net>
   7  * http://www.orbis-terrarum.net/?l=people.robbat2
   8  *
   9  * Defines a set of function callbacks that have a pure C version available if
  10  * the "ctype" extension is available, but otherwise have PHP versions to use
  11  * (that are slower).
  12  *
  13  * The SQL Parser code relies heavily on these functions.
  14  *
  15  * @package phpMyAdmin-StringType-Native
  16  */
  17
  18 /**
  19  * Checks if a character is an alphanumeric one
  20  *
  21  * @param string   character to check for
  22  * @return  boolean  whether the character is an alphanumeric one or not
  23  */
  24 function PMA_STR_isAlnum($c)
  25 {
  26     return (PMA_STR_isUpper($c) || PMA_STR_isLower($c) || PMA_STR_isDigit($c));
  27 } // end of the "PMA_STR_isAlnum()" function
  28
  29 /**
  30  * Checks if a character is an alphabetic one
  31  *
  32  * @param string   character to check for
  33  * @return  boolean  whether the character is an alphabetic one or not
  34  */
  35 function PMA_STR_isAlpha($c)
  36 {
  37     return (PMA_STR_isUpper($c) || PMA_STR_isLower($c));
  38 } // end of the "PMA_STR_isAlpha()" function
  39
  40 /**
  41  * Checks if a character is a digit
  42  *
  43  * @param string   character to check for
  44  * @return  boolean  whether the character is a digit or not
  45  */
  46 function PMA_STR_isDigit($c)
  47 {
  48     $ord_zero = 48; //ord('0');
  49     $ord_nine = 57; //ord('9');
  50     $ord_c    = ord($c);
  51
  52     return PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine);
  53 } // end of the "PMA_STR_isDigit()" function
  54
  55 /**
  56  * Checks if a character is an upper alphabetic one
  57  *
  58  * @param string   character to check for
  59  * @return  boolean  whether the character is an upper alphabetic one or not
  60  */
  61 function PMA_STR_isUpper($c)
  62 {
  63     $ord_zero = 65; //ord('A');
  64     $ord_nine = 90; //ord('Z');
  65     $ord_c    = ord($c);
  66
  67     return PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine);
  68 } // end of the "PMA_STR_isUpper()" function
  69
  70 /**
  71  * Checks if a character is a lower alphabetic one
  72  *
  73  * @param string   character to check for
  74  * @return  boolean  whether the character is a lower alphabetic one or not
  75  */
  76 function PMA_STR_isLower($c)
  77 {
  78     $ord_zero = 97;  //ord('a');
  79     $ord_nine = 122; //ord('z');
  80     $ord_c    = ord($c);
  81
  82     return PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine);
  83 } // end of the "PMA_STR_isLower()" function
  84
  85 /**
  86  * Checks if a character is a space one
  87  *
  88  * @param string   character to check for
  89  * @return  boolean  whether the character is a space one or not
  90  */
  91 function PMA_STR_isSpace($c)
  92 {
  93     $ord_space = 32;    //ord(' ')
  94     $ord_tab   = 9;     //ord('\t')
  95     $ord_CR    = 13;    //ord('\n')
  96     $ord_NOBR  = 160;   //ord('U+00A0);
  97     $ord_c     = ord($c);
  98
  99     return ($ord_c == $ord_space
 100          || $ord_c == $ord_NOBR
 101          || PMA_STR_numberInRangeInclusive($ord_c, $ord_tab, $ord_CR));
 102 } // end of the "PMA_STR_isSpace()" function
 103
 104 /**
 105  * Checks if a character is an hexadecimal digit
 106  *
 107  * @param string   character to check for
 108  * @return  boolean  whether the character is an hexadecimal digit or not
 109  */
 110 function PMA_STR_isHexDigit($c)
 111 {
 112     $ord_Aupper = 65;  //ord('A');
 113     $ord_Fupper = 70;  //ord('F');
 114     $ord_Alower = 97;  //ord('a');
 115     $ord_Flower = 102; //ord('f');
 116     $ord_zero   = 48;  //ord('0');
 117     $ord_nine   = 57;  //ord('9');
 118     $ord_c      = ord($c);
 119
 120     return (PMA_STR_numberInRangeInclusive($ord_c, $ord_zero, $ord_nine)
 121          || PMA_STR_numberInRangeInclusive($ord_c, $ord_Aupper, $ord_Fupper)
 122          || PMA_STR_numberInRangeInclusive($ord_c, $ord_Alower, $ord_Flower));
 123 } // end of the "PMA_STR_isHexDigit()" function
 124
 125 ?>