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// file : odb/oracle/oracle-types.hxx
// author : Constantin Michael <constantin@codesynthesis.com>
// copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC
// license : ODB NCUEL; see accompanying LICENSE file
#ifndef ODB_ORACLE_ORACLE_TYPES_HXX
#define ODB_ORACLE_ORACLE_TYPES_HXX
#include <odb/pre.hxx>
#include <odb/oracle/version.hxx>
#include <odb/oracle/oracle-fwd.hxx>
namespace odb
{
namespace oracle
{
enum chunk_position
{
one_chunk,
first_chunk,
next_chunk,
last_chunk
};
// Callback function signature used to specify LOB parameters that are
// passed to the database. If false is returned from the callback,
// statement execution is aborted.
//
typedef bool (*param_callback_type) (
void* context, // [in] The user context.
ub4* position_context, // [in] A positional context. A callback is free
// to use this to track positional information.
void** buffer, // [out] On return, a pointer to a buffer
// containing parameter data.
ub4* size, // [out] The parameter data size in bytes.
chunk_position*, // [out] The position of the chunk of data in
// buffer.
void* temp_buffer, // [in] A temporary buffer that may be used if
// required. The buffer argument should specify
// this buffer on return if it is used.
ub4 capacity); // [in] The temporary buffer length in bytes.
// Callback function signature used to specify LOB values returned from
// the database. If false is returned, database_exception is thrown.
//
typedef bool (*result_callback_type) (
void* context, // [in] The user context.
void* buffer, // [in] A buffer containing the result data.
ub4 size, // [in] The result data length in bytes.
chunk_position); // [in] The position of this chunk.
struct bind
{
ub2 type; // The type stored by buffer. This must be an external
// OCI type identifier of the form SQLT_XXX.
void* buffer; // Data buffer pointer.
ub2* size; // The number of bytes in buffer. When parameter
// callbacks are in use, this is interpreted as a ub4*
// indicating the current position. When result
// callbacks are in use, this is interpreted as an
// OCILobLocator*.
ub4 capacity; // The maximum number of bytes that can be stored in
// buffer.
sb2* indicator; // Pointer to an OCI indicator variable.
union
{
param_callback_type param;
result_callback_type result;
} callback;
// This pointer is provided to the user through the context argument
// in both parameter and result callback functions.
//
void* callback_context;
};
}
}
#include <odb/post.hxx>
#endif // ODB_ORACLE_ORACLE_TYPES_HXX
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