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Commit0db1a95

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Repair not-too-well-thought-out code to do rangechecking of OIDs on
64-bit machines. Also, make oidvectorin use the same code as oidin.
1 parent369aace commit0db1a95

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2 files changed

+98
-54
lines changed

2 files changed

+98
-54
lines changed

‎src/backend/utils/adt/oid.c‎

Lines changed: 88 additions & 52 deletions
Original file line numberDiff line numberDiff line change
@@ -1,28 +1,108 @@
11
/*-------------------------------------------------------------------------
22
*
33
* oid.c
4-
* Functions for the built-in type Oid.
4+
* Functions for the built-in type Oid ... also oidvector.
55
*
66
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
77
* Portions Copyright (c) 1994, Regents of the University of California
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/utils/adt/oid.c,v 1.41 2000/12/03 20:45:36 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/utils/adt/oid.c,v 1.42 2000/12/22 21:36:09 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
1515
#include"postgres.h"
1616

1717
#include<ctype.h>
1818
#include<errno.h>
19+
#include<limits.h>
1920

2021
#include"utils/builtins.h"
2122

2223
/*****************************************************************************
2324
* USER I/O ROUTINES *
2425
*****************************************************************************/
2526

27+
staticOid
28+
oidin_subr(constchar*funcname,constchar*s,char**endloc)
29+
{
30+
unsigned longcvt;
31+
char*endptr;
32+
Oidresult;
33+
34+
errno=0;
35+
36+
cvt=strtoul(s,&endptr,10);
37+
38+
/*
39+
* strtoul() normally only sets ERANGE. On some systems it also
40+
* may set EINVAL, which simply means it couldn't parse the
41+
* input string. This is handled by the second "if" consistent
42+
* across platforms. Note that for historical reasons we accept
43+
* an empty string as meaning 0.
44+
*/
45+
if (errno&&errno!=EINVAL)
46+
elog(ERROR,"%s: error reading \"%s\": %m",
47+
funcname,s);
48+
if (endptr==s&&*endptr)
49+
elog(ERROR,"%s: error in \"%s\": can't parse \"%s\"",
50+
funcname,s,endptr);
51+
52+
if (endloc)
53+
{
54+
/* caller wants to deal with rest of string */
55+
*endloc=endptr;
56+
}
57+
else
58+
{
59+
/* allow only whitespace after number */
60+
while (*endptr&&isspace((unsignedchar)*endptr))
61+
endptr++;
62+
if (*endptr)
63+
elog(ERROR,"%s: error in \"%s\": can't parse \"%s\"",
64+
funcname,s,endptr);
65+
}
66+
67+
result= (Oid)cvt;
68+
69+
/*
70+
* Cope with possibility that unsigned long is wider than Oid.
71+
*
72+
* To ensure consistent results on 32-bit and 64-bit platforms,
73+
* make sure the error message is the same as if strtoul() had
74+
* returned ERANGE.
75+
*/
76+
#ifOID_MAX<ULONG_MAX
77+
if (cvt> (unsigned long)OID_MAX)
78+
elog(ERROR,"%s: error reading \"%s\": %s",
79+
funcname,s,strerror(ERANGE));
80+
#endif
81+
82+
returnresult;
83+
}
84+
85+
Datum
86+
oidin(PG_FUNCTION_ARGS)
87+
{
88+
char*s=PG_GETARG_CSTRING(0);
89+
Oidresult;
90+
91+
result=oidin_subr("oidin",s,NULL);
92+
PG_RETURN_OID(result);
93+
}
94+
95+
Datum
96+
oidout(PG_FUNCTION_ARGS)
97+
{
98+
Oido=PG_GETARG_OID(0);
99+
char*result= (char*)palloc(12);
100+
101+
snprintf(result,12,"%u",o);
102+
PG_RETURN_CSTRING(result);
103+
}
104+
105+
26106
/*
27107
*oidvectorin- converts "num num ..." to internal form
28108
*
@@ -38,14 +118,13 @@ oidvectorin(PG_FUNCTION_ARGS)
38118

39119
result= (Oid*)palloc(sizeof(Oid[INDEX_MAX_KEYS]));
40120

41-
for (slot=0;*oidString&&slot<INDEX_MAX_KEYS;slot++)
121+
for (slot=0;slot<INDEX_MAX_KEYS;slot++)
42122
{
43-
if (sscanf(oidString,"%u",&result[slot])!=1)
44-
break;
45123
while (*oidString&&isspace((unsignedchar)*oidString))
46124
oidString++;
47-
while (*oidString&&isdigit((unsignedchar)*oidString))
48-
oidString++;
125+
if (*oidString=='\0')
126+
break;
127+
result[slot]=oidin_subr("oidvectorin",oidString,&oidString);
49128
}
50129
while (*oidString&&isspace((unsignedchar)*oidString))
51130
oidString++;
@@ -88,49 +167,6 @@ oidvectorout(PG_FUNCTION_ARGS)
88167
PG_RETURN_CSTRING(result);
89168
}
90169

91-
Datum
92-
oidin(PG_FUNCTION_ARGS)
93-
{
94-
char*s=PG_GETARG_CSTRING(0);
95-
unsigned longcvt;
96-
char*endptr;
97-
Oidresult;
98-
99-
errno=0;
100-
101-
cvt=strtoul(s,&endptr,10);
102-
103-
/*
104-
* strtoul() normally only sets ERANGE. On some systems it also
105-
* may set EINVAL, which simply means it couldn't parse the
106-
* input string. This is handled by the second "if" consistent
107-
* across platforms.
108-
*/
109-
if (errno&&errno!=EINVAL)
110-
elog(ERROR,"oidin: error reading \"%s\": %m",s);
111-
if (endptr&&*endptr)
112-
elog(ERROR,"oidin: error in \"%s\": can't parse \"%s\"",s,endptr);
113-
114-
/*
115-
* Cope with possibility that unsigned long is wider than Oid.
116-
*/
117-
result= (Oid)cvt;
118-
if ((unsigned long)result!=cvt)
119-
elog(ERROR,"oidin: error reading \"%s\": value too large",s);
120-
121-
returnObjectIdGetDatum(result);
122-
}
123-
124-
Datum
125-
oidout(PG_FUNCTION_ARGS)
126-
{
127-
Oido=PG_GETARG_OID(0);
128-
char*result= (char*)palloc(12);
129-
130-
snprintf(result,12,"%u",o);
131-
PG_RETURN_CSTRING(result);
132-
}
133-
134170
/*****************************************************************************
135171
* PUBLIC ROUTINES *
136172
*****************************************************************************/
@@ -294,8 +330,8 @@ text_oid(PG_FUNCTION_ARGS)
294330
memcpy(str,VARDATA(string),len);
295331
*(str+len)='\0';
296332

297-
result=DatumGetObjectId(DirectFunctionCall1(oidin,
298-
CStringGetDatum(str)));
333+
result=oidin_subr("text_oid",str,NULL);
334+
299335
pfree(str);
300336

301337
PG_RETURN_OID(result);

‎src/include/postgres_ext.h‎

Lines changed: 10 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -16,17 +16,25 @@
1616
*use header files that are otherwise internal to Postgres to interface
1717
*with the backend.
1818
*
19-
* $Id: postgres_ext.h,v 1.4 1999/06/04 21:12:07 tgl Exp $
19+
* $Id: postgres_ext.h,v 1.5 2000/12/22 21:36:09 tgl Exp $
2020
*
2121
*-------------------------------------------------------------------------
2222
*/
2323

2424
#ifndefPOSTGRES_EXT_H
2525
#definePOSTGRES_EXT_H
2626

27+
/*
28+
* Object ID is a fundamental type in Postgres.
29+
*/
2730
typedefunsignedintOid;
2831

29-
/* NAMEDATALEN is the max length for system identifiers (e.g. table names,
32+
#defineOID_MAX UINT_MAX
33+
/* you will need to include <limits.h> to use the above #define */
34+
35+
36+
/*
37+
* NAMEDATALEN is the max length for system identifiers (e.g. table names,
3038
* attribute names, function names, etc.)
3139
*
3240
* NOTE that databases with different NAMEDATALEN's cannot interoperate!

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