/* 
 * tclAppInit.c --
 *
 *	Provides a default version of the main program and Tcl_AppInit
 *	procedure for Tcl applications (without Tk).
 *
 * Copyright (c) 1993 The Regents of the University of California.
 * Copyright (c) 1994-1997 Sun Microsystems, Inc.
 * Copyright (c) 1998-1999 by Scriptics Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclAppInit.c,v 1.8 1999/12/02 02:03:32 redman Exp $
 */

#include "tcl.h"

/*
 * The following variable is a special hack that is needed in order for
 * Sun shared libraries to be used for Tcl.
 */

extern int matherr();
int *tclDummyMathPtr = (int *) matherr;


#ifdef TCL_TEST

#include "tclInt.h"

extern int		Tcltest_Init _ANSI_ARGS_((Tcl_Interp *interp));
extern int		Tcltest_SafeInit _ANSI_ARGS_((Tcl_Interp *interp));
#endif


/*
 *----------------------------------------------------------------------
 *
 * main --
 *
 *	This is the main program for the application.
 *
 * Results:
 *	None: Tcl_Main never returns here, so this procedure never
 *	returns either.
 *
 * Side effects:
 *	Whatever the application does.
 *
 *----------------------------------------------------------------------
 */

int
#ifdef _USING_PROTOTYPES_
main (int    argc,		/* Number of command-line arguments. */
     char **argv)		/* Values of command-line arguments. */
#else
main(argc, argv)
    int argc;			/* Number of command-line arguments. */
    char **argv;		/* Values of command-line arguments. */
#endif
{
    /*
     * The following #if block allows you to change the AppInit
     * function by using a #define of TCL_LOCAL_APPINIT instead
     * of rewriting this entire file.  The #if checks for that
     * #define and uses Tcl_AppInit if it doesn't exist.
     */
    
#ifndef TCL_LOCAL_APPINIT
#define TCL_LOCAL_APPINIT Tcl_AppInit    
#endif
    extern int TCL_LOCAL_APPINIT _ANSI_ARGS_((Tcl_Interp *interp));
    
    /*
     * The following #if block allows you to change how Tcl finds the startup
     * script, prime the library or encoding paths, fiddle with the argv,
     * etc., without needing to rewrite Tcl_Main()
     */
    
#ifdef TCL_LOCAL_MAIN_HOOK
    extern int TCL_LOCAL_MAIN_HOOK _ANSI_ARGS_((int *argc, char ***argv));
#endif

#ifdef TCL_TEST
    /*
     * Pass the build time location of the tcl library (to find init.tcl)
     *
     * This causes a 2400b "potential" mem leak, according to purify
     * (the obj allocation that never seems to gets deallocated)
     */
    Tcl_Obj *path;
    path = Tcl_NewStringObj(TCL_BUILDTIME_LIBRARY, -1);
    TclSetLibraryPath(Tcl_NewListObj(1,&path));

#endif

#ifdef TCL_LOCAL_MAIN_HOOK
    TCL_LOCAL_MAIN_HOOK(&argc, &argv);
#endif

    Tcl_Main(argc, argv, TCL_LOCAL_APPINIT);
    
    return 0;			/* Needed only to prevent compiler warning. */
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_AppInit --
 *
 *	This procedure performs application-specific initialization.
 *	Most applications, especially those that incorporate additional
 *	packages, will have their own version of this procedure.
 *
 * Results:
 *	Returns a standard Tcl completion code, and leaves an error
 *	message in the interp's result if an error occurs.
 *
 * Side effects:
 *	Depends on the startup script.
 *
 *----------------------------------------------------------------------
 */

int
#ifdef _USING_PROTOTYPES_
Tcl_AppInit (Tcl_Interp *interp)/* Interpreter for application. */
#else
Tcl_AppInit(interp)
    Tcl_Interp *interp;		/* Interpreter for application. */
#endif
{
    if (Tcl_Init(interp) == TCL_ERROR) {
	return TCL_ERROR;
    }

#ifdef TCL_TEST
    if (Tcltest_Init(interp) == TCL_ERROR) {
	return TCL_ERROR;
    }
    Tcl_StaticPackage(interp, "Tcltest", Tcltest_Init,
            Tcltest_SafeInit);
#endif

    /*
     * Call the init procedures for included packages.  Each call should
     * look like this:
     *
     * if (Mod_Init(interp) == TCL_ERROR) {
     *     return TCL_ERROR;
     * }
     *
     * where "Mod" is the name of the module.
     */

    /*
     * Call Tcl_CreateCommand for application-specific commands, if
     * they weren't already created by the init procedures called above.
     */

    /*
     * Specify a user-specific startup file to invoke if the application
     * is run interactively.  Typically the startup file is "~/.apprc"
     * where "app" is the name of the application.  If this line is deleted
     * then no user-specific startup file will be run under any conditions.
     */

    Tcl_SetVar(interp, "tcl_rcFileName", "~/.tclshrc", TCL_GLOBAL_ONLY);
    return TCL_OK;
}
