Hi list,
I've been trying to import some of the true_false strings provided by
libwireshark.dll into a plugin, but can't get the compiler to grock it.
Here's the relevant code snippet from my source file.
#include <epan/packet.h>
#include <epan/xdlc.h>
static hf_register_info hf[] =
{
{ &hf_lap_p,
{ "Poll", "lap.control.p", FT_BOOLEAN, 8,
[line 683] TFS(&flags_set_truth), XDLC_P_F, "", HFILL }},
....
}
Compiling this file, using VC6, gives
packet-.c
packet-.c(683) : error C2099: initializer is not a constant
packet-.c(683) : warning C4047: 'initializing' : 'const void *' differs in levels of indirection from 'const int '
packet-.c(683) : warning C4047: 'initializing' : 'unsigned int ' differs in levels of indirection from 'char [1]'
packet-.c(683) : warning C4047: 'initializing' : 'int ' differs in levels of indirection from 'void *'
So I looked at the export of the symbol flags_set_truth. As documented
these shall be marked WS_VAR_IMPORT, which they are (see epan/tfs.h).
They are also set in libwireshark.def as DATA.
The nmake file is of the latest fashion with
CFLAGS=/DHAVE_WIN32_LIBWIRESHARK_LIB /D_NEED_VAR_IMPORT_ $(CFLAGS) so the
VAR_IMPORT should be covered.
I've got the sneaking suspicion that you can't import constants this way
from another DLL, although exporting dscp_vals[] from
epan/dissectors/packet-ip.c does work!?
Anyone a suggestion how to properly address this?
Thanx,
Jaap
