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/******************************************************
Data types
(c) 1996 Innobase Oy
Created 1/16/1996 Heikki Tuuri
*******************************************************/
#include "mach0data.h"
/*************************************************************************
Sets a data type structure. */
UNIV_INLINE
void
dtype_set(
/*======*/
dtype_t* type, /* in: type struct to init */
ulint mtype, /* in: main data type */
ulint prtype, /* in: precise type */
ulint len, /* in: length of type */
ulint prec) /* in: precision of type */
{
ut_ad(type);
ut_ad(mtype <= DATA_MTYPE_MAX);
type->mtype = mtype;
type->prtype = prtype;
type->len = len;
type->prec = prec;
ut_ad(dtype_validate(type));
}
/*************************************************************************
Copies a data type structure. */
UNIV_INLINE
void
dtype_copy(
/*=======*/
dtype_t* type1, /* in: type struct to copy to */
dtype_t* type2) /* in: type struct to copy from */
{
*type1 = *type2;
ut_ad(dtype_validate(type1));
}
/*************************************************************************
Gets the SQL main data type. */
UNIV_INLINE
ulint
dtype_get_mtype(
/*============*/
dtype_t* type)
{
ut_ad(type);
return(type->mtype);
}
/*************************************************************************
Gets the precise data type. */
UNIV_INLINE
ulint
dtype_get_prtype(
/*=============*/
dtype_t* type)
{
ut_ad(type);
return(type->prtype);
}
/*************************************************************************
Gets the type length. */
UNIV_INLINE
ulint
dtype_get_len(
/*==========*/
dtype_t* type)
{
ut_ad(type);
return(type->len);
}
/*************************************************************************
Gets the type precision. */
UNIV_INLINE
ulint
dtype_get_prec(
/*===========*/
dtype_t* type)
{
ut_ad(type);
return(type->prec);
}
/*************************************************************************
Gets the padding character code for the type. */
UNIV_INLINE
ulint
dtype_get_pad_char(
/*===============*/
/* out: padding character code, or
ULINT_UNDEFINED if no padding specified */
dtype_t* type) /* in: type */
{
if (type->mtype == DATA_CHAR
|| type->mtype == DATA_VARCHAR
|| type->mtype == DATA_BINARY
|| type->mtype == DATA_FIXBINARY
|| type->mtype == DATA_MYSQL
|| type->mtype == DATA_VARMYSQL) {
/* Space is the padding character for all char and binary
strings */
return((ulint)' ');
}
/* No padding specified */
return(ULINT_UNDEFINED);
}
/**************************************************************************
Stores for a type the information which determines its alphabetical ordering
and the storage size of an SQL NULL value. */
UNIV_INLINE
void
dtype_store_for_order_and_null_size(
/*================================*/
byte* buf, /* in: buffer for DATA_ORDER_NULL_TYPE_BUF_SIZE
bytes where we store the info */
dtype_t* type) /* in: type struct */
{
ut_ad(4 == DATA_ORDER_NULL_TYPE_BUF_SIZE);
buf[0] = (byte)(type->mtype & 0xFF);
if (type->prtype & DATA_BINARY_TYPE) {
buf[0] = buf[0] | 128;
}
if (type->prtype & DATA_NONLATIN1) {
buf[0] = buf[0] | 64;
}
buf[1] = (byte)(type->prtype & 0xFF);
mach_write_to_2(buf + 2, type->len & 0xFFFF);
}
/**************************************************************************
Reads to a type the stored information which determines its alphabetical
ordering and the storage size of an SQL NULL value. */
UNIV_INLINE
void
dtype_read_for_order_and_null_size(
/*===============================*/
dtype_t* type, /* in: type struct */
byte* buf) /* in: buffer for stored type order info */
{
ut_ad(4 == DATA_ORDER_NULL_TYPE_BUF_SIZE);
type->mtype = buf[0] & 63;
type->prtype = buf[1];
if (buf[0] & 128) {
type->prtype = type->prtype | DATA_BINARY_TYPE;
}
if (buf[0] & 64) {
type->prtype = type->prtype | DATA_NONLATIN1;
}
type->len = mach_read_from_2(buf + 2);
}
/***************************************************************************
Returns the size of a fixed size data type, 0 if not a fixed size type. */
UNIV_INLINE
ulint
dtype_get_fixed_size(
/*=================*/
/* out: fixed size, or 0 */
dtype_t* type) /* in: type */
{
ulint mtype;
mtype = dtype_get_mtype(type);
switch (mtype) {
case DATA_CHAR:
case DATA_FIXBINARY:
case DATA_INT:
case DATA_FLOAT:
case DATA_DOUBLE:
case DATA_MYSQL:
return(dtype_get_len(type));
case DATA_SYS: if (type->prtype == DATA_ROW_ID) {
return(DATA_ROW_ID_LEN);
} else if (type->prtype == DATA_TRX_ID) {
return(DATA_TRX_ID_LEN);
} else if (type->prtype == DATA_ROLL_PTR) {
return(DATA_ROLL_PTR_LEN);
} else {
return(0);
}
case DATA_VARCHAR:
case DATA_BINARY:
case DATA_DECIMAL:
case DATA_VARMYSQL:
case DATA_BLOB:
return(0);
default: ut_a(0);
}
return(0);
}
/***************************************************************************
Returns a stored SQL NULL size for a type. For fixed length types it is
the fixed length of the type, otherwise 0. */
UNIV_INLINE
ulint
dtype_get_sql_null_size(
/*====================*/
/* out: SQL null storage size */
dtype_t* type) /* in: type */
{
return(dtype_get_fixed_size(type));
}
/***************************************************************************
Returns TRUE if a type is of a fixed size. */
UNIV_INLINE
ibool
dtype_is_fixed_size(
/*================*/
/* out: TRUE if fixed size */
dtype_t* type) /* in: type */
{
ulint size;
size = dtype_get_fixed_size(type);
if (size) {
return(TRUE);
}
return(FALSE);
}