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Add binary I/O routines for a bunch more datatypes. Still a few to go,

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but that was enough tedium for one day.  Along the way, move the few
support routines for types xid and cid into a more logical place.
This commit is contained in:
Tom Lane
2003-05-12 23:08:52 +00:00
parent b02832719c
commit 30f609484d
25 changed files with 1133 additions and 216 deletions
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84
src/backend/utils/adt/char.c
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@ -1,20 +1,21 @@
/*-------------------------------------------------------------------------
*
* char.c
* Functions for the built-in type "char".
* Functions for the built-in type "cid" (what's that doing here?)
* Functions for the built-in type "char" (not to be confused with
* bpchar, which is the SQL CHAR(n) type).
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/char.c,v 1.34 2003/03/11 21:01:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/char.c,v 1.35 2003/05/12 23:08:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "libpq/pqformat.h"
#include "utils/builtins.h"
/*****************************************************************************
@ -52,6 +53,35 @@ charout(PG_FUNCTION_ARGS)
PG_RETURN_CSTRING(result);
}
/*
* charrecv - converts external binary format to char
*
* The external representation is one byte, with no character set
* conversion. This is somewhat dubious, perhaps, but in many
* cases people use char for a 1-byte binary type.
*/
Datum
charrecv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
PG_RETURN_CHAR(pq_getmsgbyte(buf));
}
/*
* charsend - converts char to binary format
*/
Datum
charsend(PG_FUNCTION_ARGS)
{
char arg1 = PG_GETARG_CHAR(0);
StringInfoData buf;
pq_begintypsend(&buf);
pq_sendbyte(&buf, arg1);
PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
}
/*****************************************************************************
* PUBLIC ROUTINES *
*****************************************************************************/
@ -196,51 +226,3 @@ char_text(PG_FUNCTION_ARGS)
PG_RETURN_TEXT_P(result);
}
/*****************************************************************************
* USER I/O ROUTINES *
*****************************************************************************/
/*
* cidin - converts CommandId to internal representation.
*/
Datum
cidin(PG_FUNCTION_ARGS)
{
char *s = PG_GETARG_CSTRING(0);
CommandId c;
c = atoi(s);
/* XXX assume that CommandId is 32 bits... */
PG_RETURN_INT32((int32) c);
}
/*
* cidout - converts a cid to external representation.
*/
Datum
cidout(PG_FUNCTION_ARGS)
{
/* XXX assume that CommandId is 32 bits... */
CommandId c = PG_GETARG_INT32(0);
char *result = (char *) palloc(16);
sprintf(result, "%u", (unsigned int) c);
PG_RETURN_CSTRING(result);
}
/*****************************************************************************
* PUBLIC ROUTINES *
*****************************************************************************/
Datum
cideq(PG_FUNCTION_ARGS)
{
/* XXX assume that CommandId is 32 bits... */
CommandId arg1 = PG_GETARG_INT32(0);
CommandId arg2 = PG_GETARG_INT32(1);
PG_RETURN_BOOL(arg1 == arg2);
}