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	dashley	64	/* $Header$ */
2	dashley	25	/*
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	dashley	66	/* End of tclstublib.c */