mirror/postgresql
2
0
Fork 0
mirror of https://git.postgresql.org/git/postgresql.git synced 2025-02-17 19:30:00 +08:00
Code Issues Packages Projects Releases Wiki Activity

Make the world safe for unsigned OIDs.

Browse Source
This commit is contained in:
Tom Lane 2000-11-21 21:51:58 +00:00
parent a70e74b060
commit cfbcb6bb21
2 changed files with 28 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
contrib/lo/lo.c
View File

@ -1,26 +1,29 @@
/*
* PostgreSQL type definitions for managed LargeObjects.
*
* $Id: lo.c,v 1.5 2000/11/20 20:36:55 tgl Exp $
* $Header: /cvsroot/pgsql/contrib/lo/lo.c,v 1.6 2000/11/21 21:51:58 tgl Exp $
*
*/
#include "postgres.h"
#include <stdio.h>
#include <postgres.h>
#include <utils/palloc.h>
#include "utils/palloc.h"
/* Required for largeobjects */
#include <libpq/libpq-fs.h>
#include <libpq/be-fsstubs.h>
#include "libpq/libpq-fs.h"
#include "libpq/be-fsstubs.h"
/* Required for SPI */
#include <executor/spi.h>
#include "executor/spi.h"
/* Required for triggers */
#include <commands/trigger.h>
#include "commands/trigger.h"
#define atooid(x) ((Oid) strtoul((x), NULL, 10))
/* required for tolower() */
/*
* This is the internal storage format for managed large objects
@ -40,7 +43,7 @@ Blob *lo(Oid oid); /* Return Blob based on oid */
Datum lo_manage(PG_FUNCTION_ARGS); /* Trigger handler */
/*
* This creates a large object, and set's its OID to the value in the
* This creates a large object, and sets its OID to the value in the
* supplied string.
*
* If the string is empty, then a new LargeObject is created, and its oid
@ -55,20 +58,13 @@ lo_in(char *str)
if (strlen(str) > 0)
{
count = sscanf(str, "%d", &oid);
count = sscanf(str, "%u", &oid);
if (count < 1)
{
elog(ERROR, "lo_in: error in parsing \"%s\"", str);
return (NULL);
}
if (oid < 0)
{
if (oid == InvalidOid)
elog(ERROR, "lo_in: illegal oid \"%s\"", str);
return (NULL);
}
}
else
{
@ -79,10 +75,7 @@ lo_in(char *str)
oid = DatumGetObjectId(DirectFunctionCall1(lo_creat,
Int32GetDatum(INV_READ | INV_WRITE)));
if (oid == InvalidOid)
{
elog(ERROR, "lo_in: InvalidOid returned from lo_creat");
return (NULL);
}
}
result = (Blob *) palloc(sizeof(Blob));
@ -104,7 +97,7 @@ lo_out(Blob * addr)
return (NULL);
result = (char *) palloc(32);
sprintf(result, "%d", *addr);
sprintf(result, "%u", *addr);
return (result);
}
@ -190,7 +183,7 @@ lo_manage(PG_FUNCTION_ARGS)
if ((orig != newv && (orig == NULL || newv == NULL)) || (orig != NULL && newv != NULL && strcmp(orig, newv)))
DirectFunctionCall1(lo_unlink,
ObjectIdGetDatum((Oid) atoi(orig)));
ObjectIdGetDatum(atooid(orig)));
if (newv)
pfree(newv);
@ -211,7 +204,7 @@ lo_manage(PG_FUNCTION_ARGS)
if (orig != NULL)
{
DirectFunctionCall1(lo_unlink,
ObjectIdGetDatum((Oid) atoi(orig)));
ObjectIdGetDatum(atooid(orig)));
pfree(orig);
}

22
contrib/lo/lo.sql.in
View File

@ -1,7 +1,7 @@
--
-- PostgreSQL code for LargeObjects
--
-- $Id: lo.sql.in,v 1.5 2000/11/20 20:36:55 tgl Exp $
-- $Id: lo.sql.in,v 1.6 2000/11/21 21:51:58 tgl Exp $
--
--
-- Create the data type
@ -33,6 +33,15 @@ create function lo_oid(lo)
as 'MODULE_PATHNAME'
language 'c';
-- same function, named to allow it to be used as a type coercion, eg:
-- create table a (image lo);
-- select image::oid from a;
--
create function oid(lo)
returns oid
as 'MODULE_PATHNAME', 'lo_oid'
language 'c';
-- this allows us to convert an oid to a managed lo object
-- ie: insert into test values (lo_import('/fullpath/file')::lo);
create function lo(oid)
@ -44,13 +53,4 @@ create function lo(oid)
create function lo_manage()
returns opaque
as 'MODULE_PATHNAME'
language 'C';
-- This allows us to map lo to oid
--
-- eg:
-- create table a (image lo);
-- select image::oid from a;
--
create function oid(lo) returns oid as 'select lo_oid($1)' language 'sql';
language 'c';