source: downloads/tcl8.5.2/unix/dltest/pkgb.c @ 25

/*
 * pkgb.c --
 *
 *      This file contains a simple Tcl package "pkgb" 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: pkgb.c,v 1.9 2007/12/13 15:28:42 dgp Exp $
 */

#include "tcl.h"

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

static int    Pkgb_SubObjCmd(ClientData clientData,
                Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);
static int    Pkgb_UnsafeObjCmd(ClientData clientData,
                Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]);

/*
 *----------------------------------------------------------------------
 *
 * Pkgb_SubObjCmd --
 *
 *      This procedure is invoked to process the "pkgb_sub" Tcl command. It
 *      expects two arguments and returns their difference.
 *
 * Results:
 *      A standard Tcl result.
 *
 * Side effects:
 *      See the user documentation.
 *
 *----------------------------------------------------------------------
 */

static int
Pkgb_SubObjCmd(
    ClientData dummy,           /* Not used. */
    Tcl_Interp *interp,         /* Current interpreter. */
    int objc,                   /* Number of arguments. */
    Tcl_Obj *CONST objv[])      /* Argument objects. */
{
    int first, second;

    if (objc != 3) {
        Tcl_WrongNumArgs(interp, 1, objv, "num num");
        return TCL_ERROR;
    }
    if ((Tcl_GetIntFromObj(interp, objv[1], &first) != TCL_OK)
            || (Tcl_GetIntFromObj(interp, objv[2], &second) != TCL_OK)) {
        return TCL_ERROR;
    }
    Tcl_SetObjResult(interp, Tcl_NewIntObj(first - second));
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * Pkgb_UnsafeObjCmd --
 *
 *      This procedure is invoked to process the "pkgb_unsafe" Tcl command. It
 *      just returns a constant string.
 *
 * Results:
 *      A standard Tcl result.
 *
 * Side effects:
 *      See the user documentation.
 *
 *----------------------------------------------------------------------
 */

static int
Pkgb_UnsafeObjCmd(
    ClientData dummy,           /* Not used. */
    Tcl_Interp *interp,         /* Current interpreter. */
    int objc,                   /* Number of arguments. */
    Tcl_Obj *CONST objv[])      /* Argument objects. */
{
    Tcl_SetObjResult(interp, Tcl_NewStringObj("unsafe command invoked", -1));
    return TCL_OK;
}

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

    if (Tcl_InitStubs(interp, TCL_VERSION, 0) == NULL) {
        return TCL_ERROR;
    }
    code = Tcl_PkgProvide(interp, "Pkgb", "2.3");
    if (code != TCL_OK) {
        return code;
    }
    Tcl_CreateObjCommand(interp, "pkgb_sub", Pkgb_SubObjCmd,
            (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
    Tcl_CreateObjCommand(interp, "pkgb_unsafe", Pkgb_UnsafeObjCmd,
            (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * Pkgb_SafeInit --
 *
 *      This is a package initialization procedure, which is called by Tcl
 *      when this package is to be added to a safe interpreter.
 *
 * Results:
 *      None.
 *
 * Side effects:
 *      None.
 *
 *----------------------------------------------------------------------
 */

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

    if (Tcl_InitStubs(interp, TCL_VERSION, 0) == NULL) {
        return TCL_ERROR;
    }
    code = Tcl_PkgProvide(interp, "Pkgb", "2.3");
    if (code != TCL_OK) {
        return code;
    }
    Tcl_CreateObjCommand(interp, "pkgb_sub", Pkgb_SubObjCmd, (ClientData) 0,
            (Tcl_CmdDeleteProc *) NULL);
    return TCL_OK;
}