45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
|
|
/* File: tuple.h
|
|
*
|
|
* Description: See "tuple.c"
|
|
*
|
|
* Important NOTE: The TupleField structure is used both to hold backend data and
|
|
* manual result set data. The "set_" functions and the TupleNode
|
|
* structure are only used for manual result sets by info routines.
|
|
*
|
|
* Comments: See "notice.txt" for copyright and license information.
|
|
*
|
|
*/
|
|
|
|
#ifndef __TUPLE_H__
|
|
#define __TUPLE_H__
|
|
|
|
#include "psqlodbc.h"
|
|
|
|
/* Used by backend data AND manual result sets */
|
|
struct TupleField_ {
|
|
Int4 len; /* length of the current Tuple */
|
|
void *value; /* an array representing the value */
|
|
};
|
|
|
|
/* Used ONLY for manual result sets */
|
|
struct TupleNode_ {
|
|
struct TupleNode_ *prev, *next;
|
|
TupleField tuple[1];
|
|
};
|
|
|
|
/* These macros are wrappers for the corresponding set_tuplefield functions
|
|
but these handle automatic NULL determination and call set_tuplefield_null()
|
|
if appropriate for the datatype (used by SQLGetTypeInfo).
|
|
*/
|
|
#define set_nullfield_string(FLD, VAL) ((VAL) ? set_tuplefield_string(FLD, (VAL)) : set_tuplefield_null(FLD))
|
|
#define set_nullfield_int2(FLD, VAL) ((VAL) != -1 ? set_tuplefield_int2(FLD, (VAL)) : set_tuplefield_null(FLD))
|
|
#define set_nullfield_int4(FLD, VAL) ((VAL) != -1 ? set_tuplefield_int4(FLD, (VAL)) : set_tuplefield_null(FLD))
|
|
|
|
void set_tuplefield_null(TupleField *tuple_field);
|
|
void set_tuplefield_string(TupleField *tuple_field, char *string);
|
|
void set_tuplefield_int2(TupleField *tuple_field, Int2 value);
|
|
void set_tuplefield_int4(TupleField *tuple_field, Int4 value);
|
|
|
|
#endif
|