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