/***********************************************************************
Comparison services for records

(c) 1994-1996 Innobase Oy

Created 7/1/1994 Heikki Tuuri
************************************************************************/

/*****************************************************************
This function is used to compare two data fields for which we know the
data type. */

int
cmp_data_data_slow(
/*===============*/	
				/* out: 1, 0, -1, if data1 is greater, equal, 
				less than data2, respectively */
	dtype_t*	cur_type,/* in: data type of the fields */
	byte*		data1,	/* in: data field (== a pointer to a memory
				buffer) */
	ulint		len1,	/* in: data field length or UNIV_SQL_NULL */
	byte*		data2,	/* in: data field (== a pointer to a memory
				buffer) */
	ulint		len2);	/* in: data field length or UNIV_SQL_NULL */


/*****************************************************************
This function is used to compare two data fields for which we know the
data type. */
UNIV_INLINE
int
cmp_data_data(
/*==========*/	
				/* out: 1, 0, -1, if data1 is greater, equal, 
				less than data2, respectively */
	dtype_t*	cur_type,/* in: data type of the fields */
	byte*		data1,	/* in: data field (== a pointer to a memory
				buffer) */
	ulint		len1,	/* in: data field length or UNIV_SQL_NULL */
	byte*		data2,	/* in: data field (== a pointer to a memory
				buffer) */
	ulint		len2)	/* in: data field length or UNIV_SQL_NULL */
{
	return(cmp_data_data_slow(cur_type, data1, len1, data2, len2));
}

/*****************************************************************
This function is used to compare two dfields where at least the first
has its data type field set. */
UNIV_INLINE
int
cmp_dfield_dfield(
/*==============*/	
				/* out: 1, 0, -1, if dfield1 is greater, equal, 
				less than dfield2, respectively */
	dfield_t*	dfield1,/* in: data field; must have type field set */
	dfield_t*	dfield2)/* in: data field */
{
	ut_ad(dfield_check_typed(dfield1));

	return(cmp_data_data(dfield_get_type(dfield1),
			dfield_get_data(dfield1), dfield_get_len(dfield1),
			dfield_get_data(dfield2), dfield_get_len(dfield2)));
}

/*****************************************************************
This function is used to compare two physical records. Only the common
first fields are compared. */
UNIV_INLINE
int
cmp_rec_rec(
/*========*/	
				/* out: 1, 0 , -1 if rec1 is greater, equal,
				less, respectively, than rec2; only the common
				first fields are compared */
	rec_t*		rec1,	/* in: physical record */
	rec_t*		rec2,	/* in: physical record */
	dict_index_t*	index)	/* in: data dictionary index */
{
	ulint	match_f		= 0;
	ulint	match_b		= 0;
	
	return(cmp_rec_rec_with_match(rec1, rec2, index, &match_f, &match_b));
}