xclusivescardwebsite /concreteOLD/libraries/3rdparty/adodb/drivers/adodb-mssql_n.inc.php

Language PHP Lines 171
MD5 Hash 4a68db8136431955789d5f4eaea76e01 Estimated Cost $1,930 (why?)
Repository https://bitbucket.org/selfeky/xclusivescardwebsite.git View Raw File View Project SPDX
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
<?php

/// $Id $

///////////////////////////////////////////////////////////////////////////
//                                                                       //
// NOTICE OF COPYRIGHT                                                   //
//                                                                       //
// ADOdb  - Database Abstraction Library for PHP                         //
//          http://adodb.sourceforge.net/                                //
//                                                                       //
// Copyright (C) 2000-2009 John Lim (jlim\@natsoft.com.my)               //
//          All rights reserved.                                         //
//          Released under both BSD license and LGPL library license.    //
//          Whenever there is any discrepancy between the two licenses,  //
//          the BSD license will take precedence                         //
//                                                                       //
// Moodle - Modular Object-Oriented Dynamic Learning Environment         //
//          http://moodle.com                                            //
//                                                                       //
// Copyright (C) 2001-3001 Martin Dougiamas        http://dougiamas.com  //
//           (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com  //
//                                                                       //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or     //
// (at your option) any later version.                                   //
//                                                                       //
// This program is distributed in the hope that it will be useful,       //
// but WITHOUT ANY WARRANTY; without even the implied warranty of        //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         //
// GNU General Public License for more details:                          //
//                                                                       //
//          http://www.gnu.org/copyleft/gpl.html                         //
//                                                                       //
///////////////////////////////////////////////////////////////////////////

/**
*  MSSQL Driver with auto-prepended "N" for correct unicode storage
*  of SQL literal strings. Intended to be used with MSSQL drivers that
*  are sending UCS-2 data to MSSQL (FreeTDS and ODBTP) in order to get
*  true cross-db compatibility from the application point of view.
*/

// security - hide paths
if (!defined('ADODB_DIR')) die();

// one useful constant
if (!defined('SINGLEQUOTE')) define('SINGLEQUOTE', "'");

include_once(ADODB_DIR.'/drivers/adodb-mssql.inc.php');

class ADODB_mssql_n extends ADODB_mssql {
	var $databaseType = "mssql_n";
	
	function ADODB_mssqlpo()
	{
		ADODB_mssql::ADODB_mssql();
	}

	function _query($sql,$inputarr=false)
	{
        $sql = $this->_appendN($sql);
		return ADODB_mssql::_query($sql,$inputarr);
	}

    /**
     * This function will intercept all the literals used in the SQL, prepending the "N" char to them
     * in order to allow mssql to store properly data sent in the correct UCS-2 encoding (by freeTDS
     * and ODBTP) keeping SQL compatibility at ADOdb level (instead of hacking every project to add
     * the "N" notation when working against MSSQL.
     *
     * Note that this hack only must be used if ALL the char-based columns in your DB are of type nchar,
     * nvarchar and ntext
     */
    function _appendN($sql) {

        $result = $sql;

    /// Check we have some single quote in the query. Exit ok.
        if (strpos($sql, SINGLEQUOTE) === false) {
            return $sql;
        }

    /// Check we haven't an odd number of single quotes (this can cause problems below
    /// and should be considered one wrong SQL). Exit with debug info.
        if ((substr_count($sql, SINGLEQUOTE) & 1)) {
            if ($this->debug) {
                ADOConnection::outp("{$this->databaseType} internal transformation: not converted. Wrong number of quotes (odd)");
            }
            return $sql;
        }

    /// Check we haven't any backslash + single quote combination. It should mean wrong
    /// backslashes use (bad magic_quotes_sybase?). Exit with debug info.
        $regexp = '/(\\\\' . SINGLEQUOTE . '[^' . SINGLEQUOTE . '])/';
        if (preg_match($regexp, $sql)) {
            if ($this->debug) {
                ADOConnection::outp("{$this->databaseType} internal transformation: not converted. Found bad use of backslash + single quote");
            }
            return $sql;
        }

    /// Remove pairs of single-quotes
        $pairs = array();
        $regexp = '/(' . SINGLEQUOTE . SINGLEQUOTE . ')/';
        preg_match_all($regexp, $result, $list_of_pairs);
        if ($list_of_pairs) {
            foreach (array_unique($list_of_pairs[0]) as $key=>$value) {
                $pairs['<@#@#@PAIR-'.$key.'@#@#@>'] = $value;
            }
            if (!empty($pairs)) {
                $result = str_replace($pairs, array_keys($pairs), $result);
            }
        }

    /// Remove the rest of literals present in the query
        $literals = array();
        $regexp = '/(N?' . SINGLEQUOTE . '.*?' . SINGLEQUOTE . ')/is';
        preg_match_all($regexp, $result, $list_of_literals);
        if ($list_of_literals) {
            foreach (array_unique($list_of_literals[0]) as $key=>$value) {
                $literals['<#@#@#LITERAL-'.$key.'#@#@#>'] = $value;
            }
            if (!empty($literals)) {
                $result = str_replace($literals, array_keys($literals), $result);
            }
        }


    /// Analyse literals to prepend the N char to them if their contents aren't numeric
        if (!empty($literals)) {
            foreach ($literals as $key=>$value) {
                if (!is_numeric(trim($value, SINGLEQUOTE))) {
                /// Non numeric string, prepend our dear N
                    $literals[$key] = 'N' . trim($value, 'N'); //Trimming potentially existing previous "N"
                }
            }
        }

    /// Re-apply literals to the text
        if (!empty($literals)) {
            $result = str_replace(array_keys($literals), $literals, $result);
        }

    /// Any pairs followed by N' must be switched to N' followed by those pairs
    /// (or strings beginning with single quotes will fail)
        $result = preg_replace("/((<@#@#@PAIR-(\d+)@#@#@>)+)N'/", "N'$1", $result);

    /// Re-apply pairs of single-quotes to the text
        if (!empty($pairs)) {
            $result = str_replace(array_keys($pairs), $pairs, $result);
        }

    /// Print transformation if debug = on
        if ($result != $sql && $this->debug) {
            ADOConnection::outp("{$this->databaseType} internal transformation:<br>{$sql}<br>to<br>{$result}");
        }

        return $result;
    }
}

class ADORecordset_mssql_n extends ADORecordset_mssql {
	var $databaseType = "mssql_n";
	function ADORecordset_mssql_n($id,$mode=false)
	{
		$this->ADORecordset_mssql($id,$mode);
	}
}
?>
Back to Top