| 1 | ' odbc.sbp
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| 2 |
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| 3 | #require <api_sqlext.sbp>
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| 4 |
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| 5 | '===========================================================
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| 6 | ' IOdbcConnection インターフェイス
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| 7 |
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| 8 | Dim IID_IOdbcConnection = [&HE0FC6F3C,&HDD4C,&H40f6,[&H82,&H8F,&H42,&H90,&H67,&H27,&H9C,&HDC]] As GUID
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| 9 | Interface IOdbcConnection
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| 10 | Inherits IUnknown
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| 11 | Function Connect(lpszDataSource As LPSTR) As SQLRETURN
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| 12 | Function Disconnect() As SQLRETURN
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| 13 | Function CreateCommand() As *COdbcCommand
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| 14 | End Interface
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| 15 |
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| 16 | Function OdbcConnection_CreateInstance() As *IOdbcConnection
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| 17 | Dim pobj_OdbcConnection As *COdbcConnection
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| 18 | pobj_OdbcConnection=New COdbcConnection()
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| 19 |
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| 20 | pobj_OdbcConnection->QueryInterface(IID_IOdbcConnection,VarPtr(OdbcConnection_CreateInstance))
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| 21 | End Function
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| 22 |
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| 23 | ' ここまで
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| 24 | '===========================================================
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| 25 |
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| 26 |
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| 27 |
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| 28 | Class COdbcConnection
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| 29 | m_ref As Long '参照カウンタ
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| 30 |
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| 31 | hEnv As SQLHENV '環境ハンドル
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| 32 | hDbc As SQLHDBC '接続ハンドル
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| 33 |
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| 34 | Public
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| 35 | Sub COdbcConnection()
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| 36 | '環境ハンドルを取得
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| 37 | SQLAllocHandle( SQL_HANDLE_ENV, 0 , hEnv )
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| 38 | SQLSetEnvAttr ( hEnv, SQL_ATTR_ODBC_VERSION, SQL_OV_ODBC3 As SQLPOINTER, 0 )
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| 39 |
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| 40 | '接続ハンドルを取得
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| 41 | SQLAllocHandle( SQL_HANDLE_DBC, hEnv, hDbc )
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| 42 | End Sub
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| 43 | Sub ~COdbcConnection()
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| 44 | '切断
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| 45 | Disconnect()
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| 46 |
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| 47 | '接続ハンドルを解放
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| 48 | SQLFreeHandle( SQL_HANDLE_DBC, hDbc )
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| 49 |
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| 50 | '環境ハンドルを解放
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| 51 | SQLFreeHandle( SQL_HANDLE_ENV, hEnv )
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| 52 | End Sub
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| 53 |
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| 54 |
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| 55 | Function GetEnvHandle() As SQLHENV
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| 56 | GetEnvHandle = hEnv
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| 57 | End Function
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| 58 | Function GetDbcHandle() As SQLHDBC
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| 59 | GetDbcHandle = hDbc
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| 60 | End Function
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| 61 |
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| 62 |
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| 63 |
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| 64 | '-------------------------------------------------------
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| 65 | ' COMインターフェイス用IUnknownメソッド
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| 66 |
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| 67 | Virtual Function QueryInterface(ByRef riid As IID, ppvObj As *VoidPtr) As HRESULT
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| 68 | If IsEqualIID(riid,IID_IOdbcConnection)<>0 or IsEqualIID(riid,IID_IUnknown)<>0 Then
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| 69 | Set_LONG_PTR(ppvObj,VarPtr(This) As LONG_PTR)
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| 70 | AddRef()
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| 71 | QueryInterface=S_OK
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| 72 | Else
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| 73 | Set_LONG_PTR(ppvObj,0)
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| 74 | QueryInterface=E_NOINTERFACE
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| 75 | End If
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| 76 | End Function
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| 77 |
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| 78 | Virtual Function AddRef() As DWord
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| 79 | m_ref++
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| 80 | AddRef=m_ref
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| 81 | End Function
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| 82 | Virtual Function Release() As DWord
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| 83 | m_ref--
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| 84 | If m_ref=0 Then
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| 85 | Delete VarPtr(This)
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| 86 | End If
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| 87 | Release=m_ref
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| 88 | End Function
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| 89 |
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| 90 | ' ここまで
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| 91 | '-------------------------------------------------------
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| 92 |
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| 93 |
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| 94 | '-------------------------------------------------------
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| 95 | ' 接続を確立
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| 96 | '-------------------------------------------------------
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| 97 | Virtual Function Connect(lpszDataSource As LPSTR) As SQLRETURN
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| 98 | Dim szConnStrOut[ELM(1024)] As Byte
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| 99 | Dim cbConnStrOut As SQLSMALLINT
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| 100 |
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| 101 | 'データベースへ接続する
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| 102 | Dim ret As SQLRETURN
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| 103 | ret=SQLDriverConnect(hDbc,
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| 104 | 0,
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| 105 | lpszDataSource,
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| 106 | SQL_NTS,
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| 107 | szConnStrOut,
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| 108 | 1024,
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| 109 | cbConnStrOut,
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| 110 | SQL_DRIVER_COMPLETE_REQUIRED)
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| 111 |
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| 112 | Connect=ret
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| 113 | End Function
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| 114 |
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| 115 |
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| 116 | '-------------------------------------------------------
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| 117 | ' 切断
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| 118 | '-------------------------------------------------------
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| 119 | Virtual Function Disconnect() As SQLRETURN
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| 120 | Disconnect = SQLDisconnect(hDbc)
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| 121 | End Function
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| 122 |
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| 123 |
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| 124 | '--------------------------------
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| 125 | ' コマンド インスタンスを生成
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| 126 | '--------------------------------
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| 127 |
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| 128 | Virtual Function CreateCommand() As *COdbcCommand
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| 129 | Dim pobj_Command As *COdbcCommand
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| 130 | pobj_Command=New COdbcCommand(VarPtr(This))
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| 131 |
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| 132 | Return pobj_Command
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| 133 | End Function
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| 134 |
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| 135 | /*
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| 136 | Function ExecDirect(lpszSQL As LPSTR) As SQLRETURN
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| 137 | '前回のステートメントハンドルを解放
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| 138 | StmtFreeHandle()
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| 139 |
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| 140 | 'ステートメントハンドルを取得する
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| 141 | SQLAllocHandle( SQL_HANDLE_STMT, hDbc, hStmt )
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| 142 |
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| 143 | 'SQL文を発行
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| 144 | ExecDirect = SQLExecDirect( hStmt, lpszSQL, SQL_NTS )
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| 145 | End Function
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| 146 |
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| 147 | Function Prepare(lpszSQL As LPSTR) As SQLRETURN
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| 148 | '前回のステートメントハンドルを解放
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| 149 | StmtFreeHandle()
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| 150 |
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| 151 | 'ステートメントハンドルを取得する
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| 152 | SQLAllocHandle( SQL_HANDLE_STMT, hDbc, hStmt )
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| 153 |
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| 154 | Prepare = SQLPrepare( hStmt, lpszSQL, SQL_NTS ) 'SQL文を設定する
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| 155 | End Function
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| 156 |
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| 157 | Function Execute() As SQLRETURN
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| 158 | Execute = SQLExecute( hStmt )
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| 159 | End Function*/
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| 160 | End Class
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| 161 |
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| 162 |
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| 163 |
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| 164 | Class COdbcCommand
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| 165 | Public
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| 166 | pobj_Connection As *COdbcConnection
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| 167 | hStmt As SQLHSTMT
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| 168 | CommandText As String
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| 169 |
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| 170 | Sub COdbcCommand(pobj_Connection As *COdbcConnection)
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| 171 | This.pobj_Connection=pobj_Connection
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| 172 | End Sub
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| 173 | Sub ~COdbcCommand()
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| 174 | If hStmt Then
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| 175 | SQLFreeHandle( SQL_HANDLE_STMT, hStmt )
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| 176 | hStmt=0
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| 177 | End If
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| 178 | End Sub
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| 179 |
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| 180 |
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| 181 | Function ExecuteReader() As *COdbcDataReader
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| 182 | 'DataReaderを構築
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| 183 | Dim pobj_DataReader As *COdbcDataReader
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| 184 | pobj_DataReader=New COdbcDataReader(VarPtr(This))
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| 185 |
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| 186 | Return pobj_DataReader
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| 187 | End Function
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| 188 |
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| 189 | Function Release() As DWord
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| 190 | Delete VarPtr(This)
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| 191 | End Function
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| 192 | End Class
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| 193 |
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| 194 |
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| 195 | Class COdbcData
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| 196 | Public
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| 197 | lpszName As LPSTR
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| 198 | iType As SQLSMALLINT
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| 199 | iSize As SQLINTEGER
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| 200 |
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| 201 | lpszValue As LPSTR
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| 202 |
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| 203 | Sub COdbcData(lpszName As LPSTR, iType As SQLSMALLINT, iSize As SQLINTEGER)
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| 204 | This.lpszName=malloc(lstrlen(lpszName)+1)
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| 205 | lstrcpy(This.lpszName,lpszName)
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| 206 |
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| 207 | This.iType=iType
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| 208 |
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| 209 | This.iSize=iSize
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| 210 |
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| 211 | lpszValue=malloc(iSize+1)
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| 212 | End Sub
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| 213 | Sub ~COdbcData()
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| 214 | free(lpszName)
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| 215 | lpszName=0
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| 216 |
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| 217 | free(lpszValue)
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| 218 | lpszValue=0
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| 219 | End Sub
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| 220 | End Class
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| 221 |
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| 222 |
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| 223 | Class COdbcDataReader
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| 224 | pobj_Command As *COdbcCommand
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| 225 |
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| 226 | Item As **COdbcData
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| 227 | iColNum As SQLSMALLINT
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| 228 |
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| 229 | bFirstRead As BOOL
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| 230 |
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| 231 | hStmt As SQLHSTMT
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| 232 |
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| 233 | Public
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| 234 |
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| 235 | Sub COdbcDataReader(pobj_Command As *COdbcCommand)
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| 236 | This.pobj_Command=pobj_Command
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| 237 |
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| 238 |
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| 239 | 'ステートメントハンドルを取得する
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| 240 | SQLAllocHandle( SQL_HANDLE_STMT,
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| 241 | pobj_Command->pobj_Connection->GetDbcHandle(),
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| 242 | hStmt )
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| 243 |
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| 244 | 'SQL文を発行
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| 245 | SQLExecDirect( hStmt, pobj_Command->CommandText, SQL_NTS )
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| 246 |
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| 247 |
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| 248 | '列数を取得
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| 249 | SQLNumResultCols(hStmt, iColNum)
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| 250 |
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| 251 | '列データ格納領域を確保
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| 252 | Item=malloc(iColNum*SizeOf(*COdbcData))
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| 253 |
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| 254 | Dim i As SQLSMALLINT
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| 255 | Dim szColName[255] As Byte
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| 256 | Dim acc_bytes As SQLSMALLINT
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| 257 | Dim iType As SQLSMALLINT, iSize As SQLINTEGER, scale As SQLSMALLINT, nullable As SQLSMALLINT
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| 258 | Dim displaysize As SQLINTEGER
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| 259 | For i=0 To ELM(iColNum)
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| 260 | '列属性を取得
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| 261 | SQLDescribeCol(hStmt,
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| 262 | i+1,
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| 263 | szColName,255,acc_bytes,
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| 264 | iType,
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| 265 | iSize,
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| 266 | scale,
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| 267 | nullable)
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| 268 |
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| 269 | '文字列に換算したときの長さを取得
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| 270 | SQLColAttributes (hStmt,
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| 271 | i+1, SQL_COLUMN_DISPLAY_SIZE, NULL, 0,
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| 272 | ByVal NULL, displaysize)
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| 273 |
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| 274 | If displaysize<lstrlen(szColName) Then
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| 275 | iSize=lstrlen(szColName)+1
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| 276 | Else
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| 277 | iSize=displaysize+1
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| 278 | End If
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| 279 |
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| 280 | '単一データを生成
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| 281 | Item[i]=New COdbcData(szColName,iType,iSize)
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| 282 |
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| 283 | 'バインド
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| 284 | Dim idummy As SQLLEN
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| 285 | SQLBindCol(hStmt, i+1, SQL_CHAR, ByVal Item[i]->lpszValue, iSize, idummy)
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| 286 | Next
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| 287 |
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| 288 | bFirstRead=1
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| 289 | End Sub
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| 290 | Sub ~COdbcDataReader()
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| 291 | Dim i As Long
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| 292 | For i=0 To ELM(iColNum)
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| 293 | Delete Item[i]
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| 294 | Next
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| 295 | free(Item)
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| 296 | Item=0
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| 297 |
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| 298 | If hStmt Then
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| 299 | SQLFreeHandle( SQL_HANDLE_STMT, hStmt )
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| 300 | hStmt=0
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| 301 | End If
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| 302 | End Sub
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| 303 |
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| 304 | Function GetFieldType(i As Long) As SQLSMALLINT
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| 305 | If i>=iColNum Then Return 0
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| 306 | Return Item[i]->iType
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| 307 | End Function
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| 308 |
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| 309 | Function GetName(i As Long) As LPSTR
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| 310 | If i>=iColNum Then Return 0
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| 311 | Return Item[i]->lpszName
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| 312 | End Function
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| 313 |
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| 314 | Function GetStrPtr(i As Long) As LPSTR
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| 315 | If i>=iColNum Then Return 0
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| 316 | Return Item[i]->lpszValue
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| 317 | End Function
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| 318 |
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| 319 | Function Read() As BOOL
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| 320 | Dim ret As SQLRETURN
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| 321 | If bFirstRead Then
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| 322 | '先頭行へ移動する
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| 323 | SQLFetchScroll( hStmt, SQL_FETCH_FIRST, 0 )
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| 324 |
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| 325 | ret = SQLFetch( hStmt )
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| 326 | If (ret = SQL_NO_DATA) Then Return 0
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| 327 |
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| 328 | bFirstRead=0
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| 329 | Else
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| 330 | '次の行へ移動する
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| 331 | ret = SQLFetchScroll( hStmt, SQL_FETCH_NEXT, 0 )
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| 332 | If (ret = SQL_NO_DATA) Then Return 0
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| 333 | End If
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| 334 |
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| 335 | Return 1
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| 336 | End Function
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| 337 |
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| 338 | Virtual Function Release() As DWord
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| 339 | Delete VarPtr(This)
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| 340 | End Function
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| 341 | End Class
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