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/***********************************************************************
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. */
UNIV_INLINE
int
cmp_data_data(
/*==========*/
/* out: 1, 0, -1, if data1 is greater, equal,
less than data2, respectively */
ulint mtype, /* in: main type */
ulint prtype, /* in: precise type */
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(mtype, prtype, 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 */
{
const dtype_t* type;
ut_ad(dfield_check_typed(dfield1));
type = dfield_get_type(dfield1);
return(cmp_data_data(type->mtype, type->prtype,
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 */
const ulint* offsets1,/* in: rec_get_offsets(rec1, index) */
const ulint* offsets2,/* in: rec_get_offsets(rec2, index) */
dict_index_t* index) /* in: data dictionary index */
{
ulint match_f = 0;
ulint match_b = 0;
return(cmp_rec_rec_with_match(rec1, rec2, offsets1, offsets2, index,
FALSE, &match_f, &match_b));
}
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