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// file : odb/mssql/mssql-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_MSSQL_MSSQL_TYPES_HXX
#define ODB_MSSQL_MSSQL_TYPES_HXX
#include <odb/pre.hxx>
#include <cstddef> // std::size_t
#include <odb/mssql/mssql-fwd.hxx>
#include <odb/mssql/version.hxx>
namespace odb
{
namespace mssql
{
enum chunk_type
{
first_chunk,
next_chunk,
last_chunk,
one_chunk,
null_chunk
};
typedef void (*param_callback_type) (
const void* context, // User context.
std::size_t* position, // Position context. Am implementation is free
// to use this to track position information. It
// is initialized to zero before the first call.
const void** buffer, // [out] Buffer contaning the data.
std::size_t* size, // [out] Data size.
chunk_type*, // [out] The position of this chunk of data.
void* temp_buffer, // A temporary buffer that may be used by the
// implementation.
std::size_t capacity); // Capacity of the temporary buffer.
typedef void (*result_callback_type) (
void* context, // User context.
std::size_t* position, // Position context. Am implementation is free
// to use this to track position information. It
// is initialized to zero before the first call.
void** buffer, // [out] Buffer to copy the data to.
std::size_t* size, // [in/out] In: amount of data copied into the
// buffer after the previous call. Out: capacity
// of the buffer.
chunk_type, // The position of this chunk; first_chunk means
// this is the first call, last_chunk means there
// is no more data, null_chunk means this value is
// NULL, and one_chunk means the value is empty
// (in this case *size is 0).
std::size_t size_left, // Contains the amount of data left or 0 if this
// information is not available.
void* temp_buffer, // A temporary buffer that may be used by the
// implementation.
std::size_t capacity); // Capacity of the temporary buffer.
struct long_callback
{
union
{
param_callback_type param;
result_callback_type result;
} callback;
union
{
const void* param;
void* result;
} context;
};
struct bind
{
// This enumeration identifies the possible buffer types that can be
// bound to a parameter or result. In most cases, these map directly
// to SQL_XXX/SQL_C_XXX codes.
//
enum buffer_type
{
bit, // Buffer is a 1-byte integer.
tinyint, // Buffer is a 1-byte integer.
smallint, // Buffer is a 2-byte integer.
int_, // Buffer is a 4-byte integer.
bigint, // Buffer is an 8-byte integer.
/*
numeric, // Buffer is an SQL_NUMERIC_STRUCT.
smallmoney, // Buffer is a 4-byte integer (*10,000 value).
money, // Buffer is an 8-byte integer (*10,000 value).
*/
float4, // Buffer is a float.
float8, // Buffer is a double.
string, // Buffer is a char array.
long_string, // Buffer is a long_callback.
nstring, // Buffer is a wchar_t (2-byte) array.
long_nstring, // Buffer is a long_callback.
binary, // Buffer is a byte array.
long_binary, // Buffer is a long_callback.
/*
date, // Buffer is an SQL_DATE_STRUCT.
time, // Buffer is an SQL_SS_TIME2_STRUCT.
datetime, // Buffer is an SQL_TIMESTAMP_STRUCT.
datetimeoffset, // Buffer is an SQL_SS_TIMESTAMPOFFSET_STRUCT.
uuid, // Buffer is a 16-byte array (or SQLGUID).
rowversion, // Buffer is an 8-byte array.
*/
last // Used as an end of list marker.
};
buffer_type type; // The buffer type.
void* buffer; // The buffer. For long data this is a long_callback.
SQLLEN* size_ind; // Pointer to the size/inidicator variable.
SQLLEN capacity; // Buffer capacity. For string/binary parameters
// this value is also used as maximum column size.
};
}
}
#include <odb/post.hxx>
#endif // ODB_MSSQL_MSSQL_TYPES_HXX
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