/*
* tclStubCall.c --
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tclInt.h"
#ifndef _WIN32
# include <dlfcn.h>
#else
# define dlopen(a,b) (void *)LoadLibrary(TEXT(a))
# define dlsym(a,b) (void *)GetProcAddress((HANDLE)(a),b)
# define dlerror() ""
#endif
MODULE_SCOPE void *tclStubsHandle;
/*
*----------------------------------------------------------------------
*
* Tcl_InitSubsystems --
*
* Load the Tcl core dynamically, version "9.0" (or higher, in future versions)
*
* Results:
* Outputs the value of the "version" argument.
*
* Side effects:
* Sets the stub table pointers.
*
*----------------------------------------------------------------------
*/
static const char PROCNAME[][24] = {
"_Tcl_InitSubsystems",
"_Tcl_FindExecutable",
"_Tcl_SetPanicProc",
"_TclZipfs_AppHook"
};
MODULE_SCOPE const char *
TclStubCall(int index, void *arg1, void *arg2)
{
static const char *(*stubFn[])(void *,void *) = {NULL,NULL,NULL,NULL};
static const char *version = NULL;
if (tclStubsHandle == (void *)-1) {
if (index == 2 && arg1 != NULL) {
((Tcl_PanicProc *)arg1)("Cannot call %s from stubbed extension\n", PROCNAME[index] + 1);
} else {
fprintf(stderr, "Cannot call %s from stubbed extension\n", PROCNAME[index] + 1);
abort();
}
}
if (!stubFn[index]) {
if (!tclStubsHandle) {
tclStubsHandle = dlopen(TCL_DLL_FILE, RTLD_NOW|RTLD_LOCAL);
if (!tclStubsHandle) {
if (index == 2 && arg1 != NULL) {
((Tcl_PanicProc *)arg1)("Cannot find " TCL_DLL_FILE ": %s\n", dlerror());
} else {
fprintf(stderr, "Cannot find " TCL_DLL_FILE ": %s\n", dlerror());
abort();
}
}
}
stubFn[index] = dlsym(tclStubsHandle, PROCNAME[index] + 1);
if (!stubFn[index]) {
stubFn[index] = dlsym(tclStubsHandle, PROCNAME[index]);
}
if (stubFn[index]) {
version = stubFn[index](arg1, arg2);
}
}
return version;
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/