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Commit1b0f58a

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Fix crash in bytea-to-XML mapping when the source value is toasted.
Report and fix by Michael McMaster. Some minor code beautification by me,also avoid memory leaks in the special-case paths.
1 parentdb31add commit1b0f58a

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1 file changed

+47
-34
lines changed
  • src/backend/utils/adt

1 file changed

+47
-34
lines changed

‎src/backend/utils/adt/xml.c

Lines changed: 47 additions & 34 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.77 2008/09/16 00:49:41 tgl Exp $
10+
* $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.78 2008/10/09 15:49:04 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -1568,8 +1568,6 @@ map_sql_value_to_xml_value(Datum value, Oid type)
15681568
{
15691569
StringInfoDatabuf;
15701570

1571-
initStringInfo(&buf);
1572-
15731571
if (type_is_array(type))
15741572
{
15751573
ArrayType*array;
@@ -1591,6 +1589,8 @@ map_sql_value_to_xml_value(Datum value, Oid type)
15911589
&elem_values,&elem_nulls,
15921590
&num_elems);
15931591

1592+
initStringInfo(&buf);
1593+
15941594
for (i=0;i<num_elems;i++)
15951595
{
15961596
if (elem_nulls[i])
@@ -1604,6 +1604,8 @@ map_sql_value_to_xml_value(Datum value, Oid type)
16041604

16051605
pfree(elem_values);
16061606
pfree(elem_nulls);
1607+
1608+
returnbuf.data;
16071609
}
16081610
else
16091611
{
@@ -1687,62 +1689,73 @@ map_sql_value_to_xml_value(Datum value, Oid type)
16871689

16881690
returnpstrdup(buf);
16891691
}
1692+
1693+
#ifdefUSE_LIBXML
1694+
caseBYTEAOID:
1695+
{
1696+
bytea*bstr=DatumGetByteaPP(value);
1697+
xmlBufferPtrbuf;
1698+
xmlTextWriterPtrwriter;
1699+
char*result;
1700+
1701+
xml_init();
1702+
1703+
buf=xmlBufferCreate();
1704+
writer=xmlNewTextWriterMemory(buf,0);
1705+
1706+
if (xmlbinary==XMLBINARY_BASE64)
1707+
xmlTextWriterWriteBase64(writer,VARDATA_ANY(bstr),
1708+
0,VARSIZE_ANY_EXHDR(bstr));
1709+
else
1710+
xmlTextWriterWriteBinHex(writer,VARDATA_ANY(bstr),
1711+
0,VARSIZE_ANY_EXHDR(bstr));
1712+
1713+
xmlFreeTextWriter(writer);
1714+
result=pstrdup((constchar*)xmlBufferContent(buf));
1715+
xmlBufferFree(buf);
1716+
returnresult;
1717+
}
1718+
#endif/* USE_LIBXML */
1719+
16901720
}
16911721

1722+
/*
1723+
* otherwise, just use the type's native text representation
1724+
*/
16921725
getTypeOutputInfo(type,&typeOut,&isvarlena);
16931726
str=OidOutputFunctionCall(typeOut,value);
16941727

1728+
/* ... exactly as-is for XML */
16951729
if (type==XMLOID)
16961730
returnstr;
16971731

1698-
#ifdefUSE_LIBXML
1699-
if (type==BYTEAOID)
1700-
{
1701-
xmlBufferPtrbuf;
1702-
xmlTextWriterPtrwriter;
1703-
char*result;
1704-
1705-
xml_init();
1706-
1707-
buf=xmlBufferCreate();
1708-
writer=xmlNewTextWriterMemory(buf,0);
1709-
1710-
if (xmlbinary==XMLBINARY_BASE64)
1711-
xmlTextWriterWriteBase64(writer,VARDATA(value),0,VARSIZE(value)-VARHDRSZ);
1712-
else
1713-
xmlTextWriterWriteBinHex(writer,VARDATA(value),0,VARSIZE(value)-VARHDRSZ);
1714-
1715-
xmlFreeTextWriter(writer);
1716-
result=pstrdup((constchar*)xmlBufferContent(buf));
1717-
xmlBufferFree(buf);
1718-
returnresult;
1719-
}
1720-
#endif/* USE_LIBXML */
1732+
/* otherwise, translate special characters as needed */
1733+
initStringInfo(&buf);
17211734

1722-
for (p=str;*p;p+=pg_mblen(p))
1735+
for (p=str;*p;p++)
17231736
{
17241737
switch (*p)
17251738
{
17261739
case'&':
1727-
appendStringInfo(&buf,"&amp;");
1740+
appendStringInfoString(&buf,"&amp;");
17281741
break;
17291742
case'<':
1730-
appendStringInfo(&buf,"&lt;");
1743+
appendStringInfoString(&buf,"&lt;");
17311744
break;
17321745
case'>':
1733-
appendStringInfo(&buf,"&gt;");
1746+
appendStringInfoString(&buf,"&gt;");
17341747
break;
17351748
case'\r':
1736-
appendStringInfo(&buf,"&#x0d;");
1749+
appendStringInfoString(&buf,"&#x0d;");
17371750
break;
17381751
default:
1739-
appendBinaryStringInfo(&buf,p,pg_mblen(p));
1752+
appendStringInfoCharMacro(&buf,*p);
17401753
break;
17411754
}
17421755
}
1743-
}
17441756

1745-
returnbuf.data;
1757+
returnbuf.data;
1758+
}
17461759
}
17471760

17481761

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