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Allow float8, int8, and related datatypes to be passed by value on machines

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where Datum is 8 bytes wide.  Since this will break old-style C functions
(those still using version 0 calling convention) that have arguments or
results of these types, provide a configure option to disable it and retain
the old pass-by-reference behavior.  Likewise, provide a configure option
to disable the recently-committed float4 pass-by-value change.

Zoltan Boszormenyi, plus configurability stuff by me.
This commit is contained in:
Tom Lane
2008-04-21 00:26:47 +00:00
parent be939544a6
commit 8472bf7a73
36 changed files with 661 additions and 243 deletions
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19
src/backend/utils/adt/cash.c
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@ -13,7 +13,7 @@
* this version handles 64 bit numbers and so can hold values up to
* $92,233,720,368,547,758.07.
*
* $PostgreSQL: pgsql/src/backend/utils/adt/cash.c,v 1.78 2008/03/25 22:42:43 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/cash.c,v 1.79 2008/04/21 00:26:45 tgl Exp $
*/
#include "postgres.h"
@ -34,14 +34,6 @@
#define LAST_PAREN (TERMINATOR - 1)
#define LAST_DIGIT (LAST_PAREN - 1)
/*
* Cash is a pass-by-ref SQL type, so we must pass and return pointers.
* These macros and support routine hide the pass-by-refness.
*/
#define PG_GETARG_CASH(n) (* ((Cash *) PG_GETARG_POINTER(n)))
#define PG_RETURN_CASH(x) return CashGetDatum(x)
/*************************************************************************
* Private routines
@ -99,15 +91,6 @@ num_word(Cash value)
return buf;
} /* num_word() */
static Datum
CashGetDatum(Cash value)
{
Cash *result = (Cash *) palloc(sizeof(Cash));
*result = value;
return PointerGetDatum(result);
}
/* cash_in()
* Convert a string to a cash data type.