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pkgd.c

/* 
 * pkgd.c --
 *
 *    This file contains a simple Tcl package "pkgd" that is intended
 *    for testing the Tcl dynamic loading facilities.  It can be used
 *    in both safe and unsafe interpreters.
 *
 * 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: pkgd.c,v 1.2 1998/09/14 18:40:18 stanton Exp $
 */

#include "tcl.h"

/*
 * Prototypes for procedures defined later in this file:
 */

static int  Pkgd_SubCmd _ANSI_ARGS_((ClientData clientData,
                Tcl_Interp *interp, int argc, char **argv));
static int  Pkgd_UnsafeCmd _ANSI_ARGS_((ClientData clientData,
                Tcl_Interp *interp, int argc, char **argv));

/*
 *----------------------------------------------------------------------
 *
 * Pkgd_SubCmd --
 *
 *    This procedure is invoked to process the "pkgd_sub" Tcl command.
 *    It expects two arguments and returns their difference.
 *
 * Results:
 *    A standard Tcl result.
 *
 * Side effects:
 *    See the user documentation.
 *
 *----------------------------------------------------------------------
 */

static int
Pkgd_SubCmd(dummy, interp, argc, argv)
    ClientData dummy;               /* Not used. */
    Tcl_Interp *interp;             /* Current interpreter. */
    int argc;                       /* Number of arguments. */
    char **argv;              /* Argument strings. */
{
    int first, second;

    if (argc != 3) {
      Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
            " num num\"", (char *) NULL);
      return TCL_ERROR;
    }
    if ((Tcl_GetInt(interp, argv[1], &first) != TCL_OK)
          || (Tcl_GetInt(interp, argv[2], &second) != TCL_OK)) {
      return TCL_ERROR;
    }
    sprintf(interp->result, "%d", first - second);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * Pkgd_UnsafeCmd --
 *
 *    This procedure is invoked to process the "pkgd_unsafe" Tcl command.
 *    It just returns a constant string.
 *
 * Results:
 *    A standard Tcl result.
 *
 * Side effects:
 *    See the user documentation.
 *
 *----------------------------------------------------------------------
 */

static int
Pkgd_UnsafeCmd(dummy, interp, argc, argv)
    ClientData dummy;               /* Not used. */
    Tcl_Interp *interp;             /* Current interpreter. */
    int argc;                       /* Number of arguments. */
    char **argv;              /* Argument strings. */
{
    interp->result = "unsafe command invoked";
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * Pkgd_Init --
 *
 *    This is a package initialization procedure, which is called
 *    by Tcl when this package is to be added to an interpreter.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    None.
 *
 *----------------------------------------------------------------------
 */

int
Pkgd_Init(interp)
    Tcl_Interp *interp;       /* Interpreter in which the package is
                         * to be made available. */
{
    int code;

    code = Tcl_PkgProvide(interp, "Pkgd", "7.3");
    if (code != TCL_OK) {
      return code;
    }
    Tcl_CreateCommand(interp, "pkgd_sub", Pkgd_SubCmd, (ClientData) 0,
          (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateCommand(interp, "pkgd_unsafe", Pkgd_UnsafeCmd, (ClientData) 0,
          (Tcl_CmdDeleteProc *) NULL);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * Pkgd_SafeInit --
 *
 *    This is a package initialization procedure, which is called
 *    by Tcl when this package is to be added to an unsafe interpreter.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    None.
 *
 *----------------------------------------------------------------------
 */

int
Pkgd_SafeInit(interp)
    Tcl_Interp *interp;       /* Interpreter in which the package is
                         * to be made available. */
{
    Tcl_CreateCommand(interp, "pkgd_sub", Pkgd_SubCmd, (ClientData) 0,
          (Tcl_CmdDeleteProc *) NULL);
    return TCL_OK;
}

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