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* fixed potential buffer overflow in FPC_WRITE_TEXT_PCHAR_AS_ARRAY (merged)

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This commit is contained in:
Jonas Maebe 2001-04-08 13:21:30 +00:00
parent 547bc5f275
commit faad9460c8
1 changed files with 24 additions and 5 deletions
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29
rtl/inc/text.inc
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@ -439,6 +439,19 @@ end;
Procedure Writeln_End(var f:TextRec);[Public,Alias:'FPC_WRITELN_END']; Procedure Writeln_End(var f:TextRec);[Public,Alias:'FPC_WRITELN_END'];
const
{$IFDEF SHORT_LINEBREAK}
eollen=1;
eol : array[0..0] of char=(#10);
{$ELSE SHORT_LINEBREAK}
{$ifdef MAC_LINEBREAK}
eollen=1;
eol : array[0..0] of char=(#13);
{$else MAC_LINEBREAK}
eollen=2;
eol : array[0..1] of char=(#13,#10);
{$endif MAC_LINEBREAK}
{$ENDIF SHORT_LINEBREAK}
begin begin
If InOutRes <> 0 then exit; If InOutRes <> 0 then exit;
case f.mode of case f.mode of
@ -484,9 +497,12 @@ Begin
fmOutput { fmAppend gets changed to fmOutPut in do_open (JM) }: fmOutput { fmAppend gets changed to fmOutPut in do_open (JM) }:
begin begin
p:=pchar(@s); p:=pchar(@s);
ArrayLen:=StrLen(p); { can't use StrLen, since that one could try to read past the end }
if ArrayLen>sizeof(s) then { of the heap (JM) }
ArrayLen:=sizeof(s); ArrayLen:=IndexByte(p,sizeof(s),0);
{ IndexByte returns -1 if not found (JM) }
if ArrayLen = -1 then
ArrayLen := sizeof(s);
If Len>ArrayLen Then If Len>ArrayLen Then
WriteBlanks(f,Len-ArrayLen); WriteBlanks(f,Len-ArrayLen);
WriteBuffer(f,p^,ArrayLen); WriteBuffer(f,p^,ArrayLen);
@ -1031,7 +1047,10 @@ end;
{ {
$Log$ $Log$
Revision 1.5 2001-03-21 23:29:40 florian Revision 1.6 2001-04-08 13:21:30 jonas
* fixed potential buffer overflow in FPC_WRITE_TEXT_PCHAR_AS_ARRAY (merged)
Revision 1.5 2001/03/21 23:29:40 florian
+ sLineBreak and misc. stuff for Kylix compatiblity + sLineBreak and misc. stuff for Kylix compatiblity
Revision 1.4 2000/11/23 13:14:02 jonas Revision 1.4 2000/11/23 13:14:02 jonas
@ -1042,5 +1061,5 @@ end;
Revision 1.2 2000/07/13 11:33:46 michael Revision 1.2 2000/07/13 11:33:46 michael
+ removed logs + removed logs
} }