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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
{
struct bind
{
ub2 type; // The type stored by buffer. This must be an external
// OCI type identifier of the form SQLT_XXX.
void* buffer; // Image buffer pointer. If this bind is associated with
// an output LOB column, interpret as an OCILobLocator*.
ub2* size; // The number of bytes in buffer. Due to
// inconsistencies in the OCI interface, this will be
// interpreted as a ub4 when callbacks are in use.
sb4 capacity; // The maximum number of bytes that can be stored in
// buffer.
sb2* indicator; // Pointer to an OCI indicator variable.
// Callback function signature used to specify LOB parameters that are
// passed to the database.
//
typedef bool (*param_callback_type) (
void** context, // [in/out] The user context.
void** buffer, // [out] On return, a pointer to a buffer containing
// parameter data.
ub4* size, // [out] The parameter data length in bytes.
bool* last, // [out] True if buffer contains the last piece of
// data.
void* temp_buffer, // [in] A temporary buffer that may be used if
// required. The 'buffer' parameter 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.
//
typedef bool (*result_callback_type) (
void** context, // [in/out] The user context.
void* buffer, // [in] A buffer containing the result data.
ub4 size, // [in] The result data length in bytes.
bool last); // [in] True if this is the last piece of result data.
param_callback_type param_callback;
result_callback_type result_callback;
// This pointer is provided to the user through the 'context' parameter
// in both parameter and result callback functions.
//
void* callback_context;
// This flag is used exclusively during parameter callback invocation.
// If set, it indicates that this is the first time the callback is
// being invoked for this bind instance, and thus OCI is requesting
// the first piece of parameter data.
//
bool first_piece;
};
}
}
#include <odb/post.hxx>
#endif // ODB_ORACLE_ORACLE_TYPES_HXX
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