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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. * * @version $Id: string.lib.php 12023 2008-11-28 14:47:09Z nijel $ * @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 * @package phpMyAdmin */ if (! defined('PHPMYADMIN')) { exit; }
$GLOBALS['PMA_allow_mbstr'] = @function_exists('mb_strlen'); $GLOBALS['PMA_allow_ctype'] = @extension_loaded('ctype');
if ($GLOBALS['PMA_allow_mbstr']) { mb_internal_encoding($GLOBALS['charset']); }
/** * Load proper code for handling input. */ if (defined('PMA_MULTIBYTE_ENCODING') || $GLOBALS['PMA_allow_mbstr']) { $GLOBALS['PMA_strpos'] = 'mb_strpos'; $GLOBALS['PMA_substr'] = 'mb_substr'; require './libraries/string_mb.lib.php'; } else { $GLOBALS['PMA_strpos'] = 'strpos'; $GLOBALS['PMA_substr'] = 'substr'; require './libraries/string_native.lib.php'; }
/** * Load ctype handler. */ if ($GLOBALS['PMA_allow_ctype']) { $GLOBALS['PMA_STR_isAlnum'] = 'ctype_alnum'; $GLOBALS['PMA_STR_isDigit'] = 'ctype_digit'; $GLOBALS['PMA_STR_isSpace'] = 'ctype_space'; require './libraries/string_type_ctype.lib.php'; } else { $GLOBALS['PMA_STR_isAlnum'] = 'PMA_STR_isAlnum'; $GLOBALS['PMA_STR_isDigit'] = 'PMA_STR_isDigit'; $GLOBALS['PMA_STR_isSpace'] = 'PMA_STR_isSpace'; require './libraries/string_type_native.lib.php'; }
/** * Checks if a given character position in the string is escaped or not * * @uses PMA_strlen() * @uses PMA_substr() * @uses max() * @uses intval() * @param string string to check for * @param integer the character to check for * @param integer starting position in the string * @return boolean whether the character is escaped or not */ function PMA_STR_charIsEscaped($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 <= $upper); } // end of the "PMA_STR_numberInRangeInclusive()" function
/** * Checks if a character is an SQL identifier * * @uses PMA_STR_isAlnum() * @param string character to check for * @param boolean whether the dot character is valid or not * @return boolean whether the character is an SQL identifier or not */ function PMA_STR_isSqlIdentifier($c, $dot_is_valid = false) { return ($GLOBALS['PMA_STR_isAlnum']($c) || ($ord_c = ord($c)) && $ord_c >= 192 && $ord_c != 215 && $ord_c != 249 || $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
?>
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