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Support type modifiers for user-defined types, and pull most knowledge

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about typmod representation for standard types out into type-specific
typmod I/O functions.  Teodor Sigaev, with some editorialization by
Tom Lane.
This commit is contained in:
Tom Lane
2006-12-30 21:21:56 +00:00
parent 24b1f14eae
commit 5725b9d9af
47 changed files with 1628 additions and 685 deletions
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87
src/backend/utils/adt/varbit.c
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@ -9,19 +9,71 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/varbit.c,v 1.50 2006/07/14 14:52:24 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/varbit.c,v 1.51 2006/12/30 21:21:54 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/htup.h"
#include "libpq/pqformat.h"
#include "utils/array.h"
#include "utils/varbit.h"
#define HEXDIG(z) ((z)<10 ? ((z)+'0') : ((z)-10+'A'))
/* common code for bittypmodin and varbittypmodin */
static int32
anybit_typmodin(ArrayType *ta, const char *typename)
{
int32 typmod;
int32 *tl;
int n;
tl = ArrayGetTypmods(ta, &n);
/*
* we're not too tense about good error message here because grammar
* shouldn't allow wrong number of modifiers for BIT
*/
if (n != 1)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid type modifier")));
if (*tl < 1)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("length for type %s must be at least 1",
typename)));
if (*tl > (MaxAttrSize * BITS_PER_BYTE))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("length for type %s cannot exceed %d",
typename, MaxAttrSize * BITS_PER_BYTE)));
typmod = *tl;
return typmod;
}
/* common code for bittypmodout and varbittypmodout */
static char *
anybit_typmodout(int32 typmod)
{
char *res = (char *) palloc(64);
if (typmod >= 0)
snprintf(res, 64, "(%d)", typmod);
else
*res = '\0';
return res;
}
/*----------
* attypmod -- contains the length of the bit string in bits, or for
* varying bits the maximum length.
@ -325,6 +377,23 @@ bit(PG_FUNCTION_ARGS)
PG_RETURN_VARBIT_P(result);
}
Datum
bittypmodin(PG_FUNCTION_ARGS)
{
ArrayType *ta = PG_GETARG_ARRAYTYPE_P(0);
PG_RETURN_INT32(anybit_typmodin(ta, "bit"));
}
Datum
bittypmodout(PG_FUNCTION_ARGS)
{
int32 typmod = PG_GETARG_INT32(0);
PG_RETURN_CSTRING(anybit_typmodout(typmod));
}
/*
* varbit_in -
* converts a string to the internal representation of a bitstring.
@ -603,6 +672,22 @@ varbit(PG_FUNCTION_ARGS)
PG_RETURN_VARBIT_P(result);
}
Datum
varbittypmodin(PG_FUNCTION_ARGS)
{
ArrayType *ta = PG_GETARG_ARRAYTYPE_P(0);
PG_RETURN_INT32(anybit_typmodin(ta, "varbit"));
}
Datum
varbittypmodout(PG_FUNCTION_ARGS)
{
int32 typmod = PG_GETARG_INT32(0);
PG_RETURN_CSTRING(anybit_typmodout(typmod));
}
/*
* Comparison operators