/*
 * pngtclStubLib.c --
 *
 *	Stub object that will be statically linked into extensions that wish
 *	to access the PNGTCL API.
 *
 * Copyright (c) 2002 Andreas Kupries <andreas_kupries@users.sourceforge.net>
 * Copyright (c) 2002 Andreas Kupries <andreas_kupries@users.sourceforge.net>
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: pngtclStubLib.c 240 2010-04-09 12:03:28Z nijtmans $
 */

#ifndef USE_TCL_STUBS
#define USE_TCL_STUBS
#endif

#include "pngtcl.h"

const PngtclStubs *pngtclStubsPtr;

/*
 *----------------------------------------------------------------------
 *
 * Pngtcl_InitStubs --
 *
 *	Checks that the correct version of Blt is loaded and that it
 *	supports stubs. It then initialises the stub table pointers.
 *
 * Results:
 *	The actual version of BLT that satisfies the request, or
 *	NULL to indicate that an error occurred.
 *
 * Side effects:
 *	Sets the stub table pointers.
 *
 *----------------------------------------------------------------------
 */

#ifdef Pngtcl_InitStubs
#undef Pngtcl_InitStubs
#endif

MODULE_SCOPE const char *
Pngtcl_InitStubs(interp, version, exact)
    Tcl_Interp *interp;
    const char *version;
    int exact;
{
    const char *result;
    ClientData data;

    result = Tcl_PkgRequireEx(interp, PACKAGE_NAME, (CONST84 char *) version, exact, &data);
    if (!result || !data) {
        return NULL;
    }

    pngtclStubsPtr = (const PngtclStubs *) data;
    return result;
}