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/*
* tclWinLoad.c --
*
* This procedure provides a version of the TclLoadFile that
* works with the Windows "LoadLibrary" and "GetProcAddress"
* API for dynamic loading.
*
* Copyright (c) 1995 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclWinLoad.c,v 1.2 1998/09/14 18:40:20 stanton Exp $
*/
#include "tclInt.h"
#include "tclPort.h"
/*
*----------------------------------------------------------------------
*
* TclLoadFile --
*
* Dynamically loads a binary code file into memory and returns
* the addresses of two procedures within that file, if they
* are defined.
*
* Results:
* A standard Tcl completion code. If an error occurs, an error
* message is left in interp->result.
*
* Side effects:
* New code suddenly appears in memory.
*
*----------------------------------------------------------------------
*/
int
TclLoadFile(interp, fileName, sym1, sym2, proc1Ptr, proc2Ptr)
Tcl_Interp *interp; /* Used for error reporting. */
char *fileName; /* Name of the file containing the desired
* code. */
char *sym1, *sym2; /* Names of two procedures to look up in
* the file's symbol table. */
Tcl_PackageInitProc **proc1Ptr, **proc2Ptr;
/* Where to return the addresses corresponding
* to sym1 and sym2. */
{
HINSTANCE handle;
char *buffer;
handle = TclWinLoadLibrary(fileName);
if (handle == NULL) {
Tcl_AppendResult(interp, "couldn't load file \"", fileName,
"\": ", Tcl_PosixError(interp), (char *) NULL);
return TCL_ERROR;
}
/*
* For each symbol, check for both Symbol and _Symbol, since Borland
* generates C symbols with a leading '_' by default.
*/
*proc1Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, sym1);
if (*proc1Ptr == NULL) {
buffer = ckalloc(strlen(sym1)+2);
buffer[0] = '_';
strcpy(buffer+1, sym1);
*proc1Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, buffer);
ckfree(buffer);
}
*proc2Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, sym2);
if (*proc2Ptr == NULL) {
buffer = ckalloc(strlen(sym2)+2);
buffer[0] = '_';
strcpy(buffer+1, sym2);
*proc2Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, buffer);
ckfree(buffer);
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* TclGuessPackageName --
*
* If the "load" command is invoked without providing a package
* name, this procedure is invoked to try to figure it out.
*
* Results:
* Always returns 0 to indicate that we couldn't figure out a
* package name; generic code will then try to guess the package
* from the file name. A return value of 1 would have meant that
* we figured out the package name and put it in bufPtr.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
TclGuessPackageName(fileName, bufPtr)
char *fileName; /* Name of file containing package (already
* translated to local form if needed). */
Tcl_DString *bufPtr; /* Initialized empty dstring. Append
* package name to this if possible. */
{
return 0;
}
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