4.3BSD/usr/ingres/source/iutil/setkey.c

# include	<ingres.h>
# include	<symbol.h>
# include	<sccs.h>

SCCSID(@(#)setkey.c	8.1	12/31/84)

/*
**	Clearkeys - reset all key indicators in descriptor
**
**	Clearkeys is used to clear the key supplied
**	flags before calls to setkey
*/


clearkeys(d)
register DESC	*d;
{
	register int	i;

	for (i = 0; i <= d->reldum.relatts; i++)
		d->relgiven[i] = 0;
	return (0);
}
/*
**  SETKEY - indicate a partial key for find
**
**	Setkey is used to set a key value into place
**	in a key. The key can be as large as the entire
**	tuple. Setkey moves the key value into the
**	proper place in the key and marks the value as
**	supplied
**
**	If the value is a null pointer, then the key is
**	cleared.
**
**	Clearkeys should be called once before the
**	first call to setkey.
*/

setkey(d, key, value, dom)
register DESC	*d;
char		*key;
char		*value;
register int	dom;
{
	register int	len;
	char		*cp;

#	ifdef xATR1
	if (tTf(22, 8))
		printf("setkey: %.14s, %d\n", d->reldum.relid, dom);
#	endif

	/* check validity of domain number */
	if (dom < 1 || dom > d->reldum.relatts)
		syserr("setkey:rel=%12s,dom=%d", d->reldum.relid, dom);

	/* if value is null, clear key */
	if (value == 0)
	{
		d->relgiven[dom] = 0;
		return;
	}

	/* mark as given */
	d->relgiven[dom] = 1;

	len = d->relfrml[dom] & I1MASK;
	cp = &key[d->reloff[dom]];

	if (d->relfrmt[dom] == CHAR)
	{
		pmove(value, cp, len, ' ');
	}
	else
	{
		bmove(value, cp, len);
	}
}