shared_source/c_tcl_base_7_5_w_mods/tclstublib.c

/* $Header$ */
/* 
 * 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;
}

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