library/adodb/drivers/adodb-sqlanywhere.inc.php

   1 <?php
   2 /*
   3 version V4.20 22 Feb 2004 (c) 2000-2004  John Lim (jlim@natsoft.com.my). All rights
   4 reserved.
   5   Released under both BSD license and Lesser GPL library license.
   6   Whenever there is any discrepancy between the two licenses,
   7   the BSD license will take precedence.
   8 Set tabs to 4 for best viewing.
   9
  10   Latest version is available at http://php.weblogs.com/
  11
  12   21.02.2002 - Wade Johnson wade@wadejohnson.de
  13                            Extended ODBC class for Sybase SQLAnywhere.
  14    1) Added support to retrieve the last row insert ID on tables with
  15           primary key column using autoincrement function.
  16
  17    2) Added blob support.  Usage:
  18                  a) create blob variable on db server:
  19
  20                 $dbconn->create_blobvar($blobVarName);
  21
  22           b) load blob var from file.  $filename must be complete path
  23
  24           $dbcon->load_blobvar_from_file($blobVarName, $filename);
  25
  26           c) Use the $blobVarName in SQL insert or update statement in the values
  27           clause:
  28
  29                 $recordSet = $dbconn->Execute('INSERT INTO tabname (idcol, blobcol) '
  30                 .
  31            'VALUES (\'test\', ' . $blobVarName . ')');
  32
  33          instead of loading blob from a file, you can also load from
  34           an unformatted (raw) blob variable:
  35           $dbcon->load_blobvar_from_var($blobVarName, $varName);
  36
  37           d) drop blob variable on db server to free up resources:
  38           $dbconn->drop_blobvar($blobVarName);
  39
  40   Sybase_SQLAnywhere data driver. Requires ODBC.
  41
  42 */
  43
  44 if (!defined('_ADODB_ODBC_LAYER')) {
  45  include(ADODB_DIR."/drivers/adodb-odbc.inc.php");
  46 }
  47
  48 if (!defined('ADODB_SYBASE_SQLANYWHERE')){
  49
  50  define('ADODB_SYBASE_SQLANYWHERE',1);
  51
  52  class ADODB_sqlanywhere extends ADODB_odbc {
  53         var $databaseType = "sqlanywhere";
  54         var $hasInsertID = true;
  55
  56         function ADODB_sqlanywhere()
  57         {
  58                 $this->ADODB_odbc();
  59         }
  60
  61          function _insertid() {
  62            return $this->GetOne('select @@identity');
  63          }
  64
  65   function create_blobvar($blobVarName) {
  66    $this->Execute("create variable $blobVarName long binary");
  67    return;
  68   }
  69
  70   function drop_blobvar($blobVarName) {
  71    $this->Execute("drop variable $blobVarName");
  72    return;
  73   }
  74
  75   function load_blobvar_from_file($blobVarName, $filename) {
  76    $chunk_size = 1000;
  77
  78    $fd = fopen ($filename, "rb");
  79
  80    $integer_chunks = (integer)filesize($filename) / $chunk_size;
  81    $modulus = filesize($filename) % $chunk_size;
  82    if ($modulus != 0){
  83         $integer_chunks += 1;
  84    }
  85
  86    for($loop=1;$loop<=$integer_chunks;$loop++){
  87         $contents = fread ($fd, $chunk_size);
  88         $contents = bin2hex($contents);
  89
  90         $hexstring = '';
  91
  92         for($loop2=0;$loop2<strlen($contents);$loop2+=2){
  93          $hexstring .= '\x' . substr($contents,$loop2,2);
  94          }
  95
  96         $hexstring = $this->qstr($hexstring);
  97
  98         $this->Execute("set $blobVarName = $blobVarName || " . $hexstring);
  99    }
 100
 101    fclose ($fd);
 102    return;
 103   }
 104
 105   function load_blobvar_from_var($blobVarName, &$varName) {
 106    $chunk_size = 1000;
 107
 108    $integer_chunks = (integer)strlen($varName) / $chunk_size;
 109    $modulus = strlen($varName) % $chunk_size;
 110    if ($modulus != 0){
 111         $integer_chunks += 1;
 112    }
 113
 114    for($loop=1;$loop<=$integer_chunks;$loop++){
 115         $contents = substr ($varName, (($loop - 1) * $chunk_size), $chunk_size);
 116         $contents = bin2hex($contents);
 117
 118         $hexstring = '';
 119
 120         for($loop2=0;$loop2<strlen($contents);$loop2+=2){
 121          $hexstring .= '\x' . substr($contents,$loop2,2);
 122          }
 123
 124         $hexstring = $this->qstr($hexstring);
 125
 126         $this->Execute("set $blobVarName = $blobVarName || " . $hexstring);
 127    }
 128
 129    return;
 130   }
 131
 132  /*
 133   Insert a null into the blob field of the table first.
 134   Then use UpdateBlob to store the blob.
 135
 136   Usage:
 137
 138   $conn->Execute('INSERT INTO blobtable (id, blobcol) VALUES (1, null)');
 139   $conn->UpdateBlob('blobtable','blobcol',$blob,'id=1');
 140  */
 141   function UpdateBlob($table,$column,&$val,$where,$blobtype='BLOB')
 142   {
 143    $blobVarName = 'hold_blob';
 144    $this->create_blobvar($blobVarName);
 145    $this->load_blobvar_from_var($blobVarName, $val);
 146    $this->Execute("UPDATE $table SET $column=$blobVarName WHERE $where");
 147    $this->drop_blobvar($blobVarName);
 148    return true;
 149   }
 150  }; //class
 151
 152  class  ADORecordSet_sqlanywhere extends ADORecordSet_odbc {
 153
 154   var $databaseType = "sqlanywhere";
 155
 156  function ADORecordSet_sqlanywhere($id,$mode=false)
 157  {
 158   $this->ADORecordSet_odbc($id,$mode);
 159  }
 160
 161
 162  }; //class
 163
 164
 165 } //define
 166 ?>