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	/* $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 */