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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 1.1.1.1 2002-01-16 10:25:38 markom 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;

}