🚀 go-pugleaf

Hi,

I don't know if this is the right place to ask my question, if not please 
advise me on which group to use.

The problem which I can't crack has to do with stdarg.h. The code compiles 
without complains but it crashes when executed. My best guess is that there 
is a problem with the handling of variable number of arguments in in Borland 
C++Builder v6.0 but I can't find any reference to such problems (which makes 
it more likely that I'm doing something wrong myself). The same code runs 
without any problem with the Microsoft VisualC++ v6 compiler.

Does anybody have a suggestion? I'm running out of idea's. :-(

My configurations is as follows:
OS: Windows XP, home edition, Dutch version. (build 2600, service pack 2)
Compiler: C++Builder version 6.0 (build 10.157)
configuration:
   compiler: no optimization, all warnings, include debug information, line 
number info,
      disable expansions, with stack frames, extended error info.

   advanced compiler: Pentium Pro code, data alignment quad, calling 
convention C,
       register variables automatic, fast floating point, ANSI C

I don't think that the other compiler configuration info is meaningfull for 
this problem so I skip those for the moment.

Codeguard shows the following results:

CodeGuard error log:
Error 00024. 0x130300 (Thread 0x0B30):
Pointer arithmetic overrun: 0x0012FF48+4, that is at offset 4+4 in local 
block
 0x0012FF44(=[ebp+0x8] @rcl.exe:0x01:003E83) which is only 4 bytes long.
Call Tree:
   0x00404E83(=rcl.exe:0x01:003E83) ...\source\rcl-memory.c#607
   0x004048CB(=rcl.exe:0x01:0038CB) ...\source\rcl-memory.c#461
   0x00406FBE(=rcl.exe:0x01:005FBE) ...\source\rcl-system.c#251
   0x0040477B(=rcl.exe:0x01:00377B) ...\source\rcl-main.c#59
   0x3267E552(=CC3260MT.DLL:0x01:07D552)

The bits of code that are involved look like this:

rcl-memory.c
...
typedef long NumberInt;
typedef double NumberFloat;

typedef enum NumberType {integer, floating, corrupt};

typedef struct {
   enum NumberType type;
   union {
      NumberInt i;
      NumberFloat f;
   } data;
} Number;
...
  writen(&accu, integer, 6);  /* line #461 */
...
void writen(Number *r, enum NumberType t, ...) {
   va_list ap;

   va_start (ap, t);  /* line #607 */
...



Kind regards,

Andre Steenveld.