shared/tcl_base/tclstublib.c

/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclstublib.c,v 1.1.1.1 2001/06/13 04:46:23 dtashley Exp $ */

/* 
 * tclStubLib.c --
 *
 *      Stub object that will be statically linked into extensions that wish
 *      to access Tcl.
 *
 * Copyright (c) 1998-1999 by Scriptics Corporation.
 * Copyright (c) 1998 Paul Duffin.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclstublib.c,v 1.1.1.1 2001/06/13 04:46:23 dtashley Exp $
 */

/*
 * We need to ensure that we use the stub macros so that this file contains
 * no references to any of the stub functions.  This will make it possible
 * to build an extension that references Tcl_InitStubs but doesn't end up
 * including the rest of the stub functions.
 */

#ifndef USE_TCL_STUBS
#define USE_TCL_STUBS
#endif
#undef USE_TCL_STUB_PROCS

#include "tclInt.h"
#include "tclPort.h"

/*
 * Ensure that Tcl_InitStubs is built as an exported symbol.  The other stub
 * functions should be built as non-exported symbols.
 */

#undef TCL_STORAGE_CLASS
#define TCL_STORAGE_CLASS DLLEXPORT

TclStubs *tclStubsPtr;
TclPlatStubs *tclPlatStubsPtr;
TclIntStubs *tclIntStubsPtr;
TclIntPlatStubs *tclIntPlatStubsPtr;

static TclStubs *       HasStubSupport _ANSI_ARGS_((Tcl_Interp *interp));

static TclStubs *
HasStubSupport (interp)
    Tcl_Interp *interp;
{
    Interp *iPtr = (Interp *) interp;

    if (iPtr->stubTable && (iPtr->stubTable->magic == TCL_STUB_MAGIC)) {
        return iPtr->stubTable;
    }
    interp->result = "This interpreter does not support stubs-enabled extensions.";
    interp->freeProc = TCL_STATIC;

    return NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_InitStubs --
 *
 *      Tries to initialise the stub table pointers and ensures that
 *      the correct version of Tcl is loaded.
 *
 * Results:
 *      The actual version of Tcl that satisfies the request, or
 *      NULL to indicate that an error occurred.
 *
 * Side effects:
 *      Sets the stub table pointers.
 *
 *----------------------------------------------------------------------
 */

#ifdef Tcl_InitStubs
#undef Tcl_InitStubs
#endif

char *
Tcl_InitStubs (interp, version, exact)
    Tcl_Interp *interp;
    char *version;
    int exact;
{
    char *actualVersion;
    TclStubs *tmp;
    
    if (!tclStubsPtr) {
        tclStubsPtr = HasStubSupport(interp);
        if (!tclStubsPtr) {
            return NULL;
        }
    }

    actualVersion = Tcl_PkgRequireEx(interp, "Tcl", version, exact,
            (ClientData *) &tmp);
    if (actualVersion == NULL) {
        tclStubsPtr = NULL;
        return NULL;
    }

    if (tclStubsPtr->hooks) {
        tclPlatStubsPtr = tclStubsPtr->hooks->tclPlatStubs;
        tclIntStubsPtr = tclStubsPtr->hooks->tclIntStubs;
        tclIntPlatStubsPtr = tclStubsPtr->hooks->tclIntPlatStubs;
    } else {
        tclPlatStubsPtr = NULL;
        tclIntStubsPtr = NULL;
        tclIntPlatStubsPtr = NULL;
    }
    
    return actualVersion;
}


/* $History: tclstublib.c $
 * 
 * *****************  Version 1  *****************
 * User: Dtashley     Date: 1/02/01    Time: 1:02a
 * Created in $/IjuScripter, IjuConsole/Source/Tcl Base
 * Initial check-in.
 */ 

/* End of TCLSTUBLIB.C */
1	dashley	25	/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclstublib.c,v 1.1.1.1 2001/06/13 04:46:23 dtashley Exp $ */
2
3			/*
4			* tclStubLib.c --
5			*
6			* Stub object that will be statically linked into extensions that wish
7			* to access Tcl.
8			*
9			* Copyright (c) 1998-1999 by Scriptics Corporation.
10			* Copyright (c) 1998 Paul Duffin.
11			*
12			* See the file "license.terms" for information on usage and redistribution
13			* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
14			*
15			* RCS: @(#) $Id: tclstublib.c,v 1.1.1.1 2001/06/13 04:46:23 dtashley Exp $
16			*/
17
18			/*
19			* We need to ensure that we use the stub macros so that this file contains
20			* no references to any of the stub functions. This will make it possible
21			* to build an extension that references Tcl_InitStubs but doesn't end up
22			* including the rest of the stub functions.
23			*/
24
25			#ifndef USE_TCL_STUBS
26			#define USE_TCL_STUBS
27			#endif
28			#undef USE_TCL_STUB_PROCS
29
30			#include "tclInt.h"
31			#include "tclPort.h"
32
33			/*
34			* Ensure that Tcl_InitStubs is built as an exported symbol. The other stub
35			* functions should be built as non-exported symbols.
36			*/
37
38			#undef TCL_STORAGE_CLASS
39			#define TCL_STORAGE_CLASS DLLEXPORT
40
41			TclStubs *tclStubsPtr;
42			TclPlatStubs *tclPlatStubsPtr;
43			TclIntStubs *tclIntStubsPtr;
44			TclIntPlatStubs *tclIntPlatStubsPtr;
45
46			static TclStubs * HasStubSupport _ANSI_ARGS_((Tcl_Interp *interp));
47
48			static TclStubs *
49			HasStubSupport (interp)
50			Tcl_Interp *interp;
51			{
52			Interp iPtr = (Interp ) interp;
53
54			if (iPtr->stubTable && (iPtr->stubTable->magic == TCL_STUB_MAGIC)) {
55			return iPtr->stubTable;
56			}
57			interp->result = "This interpreter does not support stubs-enabled extensions.";
58			interp->freeProc = TCL_STATIC;
59
60			return NULL;
61			}
62
63			/*
64			*----------------------------------------------------------------------
65			*
66			* Tcl_InitStubs --
67			*
68			* Tries to initialise the stub table pointers and ensures that
69			* the correct version of Tcl is loaded.
70			*
71			* Results:
72			* The actual version of Tcl that satisfies the request, or
73			* NULL to indicate that an error occurred.
74			*
75			* Side effects:
76			* Sets the stub table pointers.
77			*
78			*----------------------------------------------------------------------
79			*/
80
81			#ifdef Tcl_InitStubs
82			#undef Tcl_InitStubs
83			#endif
84
85			char *
86			Tcl_InitStubs (interp, version, exact)
87			Tcl_Interp *interp;
88			char *version;
89			int exact;
90			{
91			char *actualVersion;
92			TclStubs *tmp;
93
94			if (!tclStubsPtr) {
95			tclStubsPtr = HasStubSupport(interp);
96			if (!tclStubsPtr) {
97			return NULL;
98			}
99			}
100
101			actualVersion = Tcl_PkgRequireEx(interp, "Tcl", version, exact,
102			(ClientData *) &tmp);
103			if (actualVersion == NULL) {
104			tclStubsPtr = NULL;
105			return NULL;
106			}
107
108			if (tclStubsPtr->hooks) {
109			tclPlatStubsPtr = tclStubsPtr->hooks->tclPlatStubs;
110			tclIntStubsPtr = tclStubsPtr->hooks->tclIntStubs;
111			tclIntPlatStubsPtr = tclStubsPtr->hooks->tclIntPlatStubs;
112			} else {
113			tclPlatStubsPtr = NULL;
114			tclIntStubsPtr = NULL;
115			tclIntPlatStubsPtr = NULL;
116			}
117
118			return actualVersion;
119			}
120
121
122			/* $History: tclstublib.c $
123			*
124			* *************** Version 1 ***************
125			* User: Dtashley Date: 1/02/01 Time: 1:02a
126			* Created in $/IjuScripter, IjuConsole/Source/Tcl Base
127			* Initial check-in.
128			*/
129
130			/* End of TCLSTUBLIB.C */