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/*
* nsfStubLib.c --
*
* Stub object that will be statically linked into extensions of the Next
* Scripting Framework.
*
* Copyright (C) 1998 Paul Duffin
* Copyright (C) 2001-2017 Gustaf Neumann (a)
* Copyright (C) 2001-2007 Uwe Zdun (a)
*
* (a) Vienna University of Economics and Business
* Institute of Information Systems and New Media
* A-1020, Welthandelsplatz 1
* Vienna, Austria
*
* This work is licensed under the MIT License http://www.opensource.org/licenses/MIT
*
* Copyright:
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* The original work by Paul Duffin was licensed as:
*
* "See the file "tcl-license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES."
*
* See also http://www.tcl.tk/software/tcltk/license.html.
*
*/
/*
* 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
/*
* This ensures that the Nsf_InitStubs has a prototype in
* nsf.h and is not the macro that turns it into Tcl_PkgRequire
*/
#ifndef USE_NSF_STUBS
# define USE_NSF_STUBS
#endif
#include "nsfInt.h"
#if defined(PRE86)
extern NsfStubs *nsfStubsPtr;
#else
MODULE_SCOPE const NsfStubs *nsfStubsPtr;
MODULE_SCOPE const NsfIntStubs *nsfIntStubsPtr;
#endif
CONST86 NsfStubs *nsfStubsPtr = NULL;
CONST86 NsfIntStubs *nsfIntStubsPtr = NULL;
/*
*----------------------------------------------------------------------
*
* Nsf_InitStubs --
*
* Tries to initialise the stub table pointers and ensures that
* the correct version of nsf is loaded.
*
* Results:
* The actual version of nsf that satisfies the request, or
* NULL to indicate that an error occurred.
*
* Side effects:
* Sets the stub table pointers.
*
*----------------------------------------------------------------------
*/
const char *
Nsf_InitStubs(Tcl_Interp *interp, const char *version, int exact) {
const char *actualVersion, *packageName = "nsf";
ClientData clientData = NULL;
actualVersion = Tcl_PkgRequireEx(interp, "nsf", version, exact,
&clientData);
if (clientData == NULL) {
/*
* When the "package require" for NSF fails, we can't use
* any NSF calls, like e.g. NsfPrintError().
*/
Tcl_ResetResult(interp);
Tcl_AppendResult(interp, "Error loading ", packageName, " package: "
"package not present, incomplete or misconfigured. "
"Maybe NSF was not compiled with COMPILE_NSF_STUBS enabled?",
(char*) 0L);
actualVersion = NULL;
} else {
CONST86 NsfStubs *stubsPtr;
if (actualVersion != NULL) {
stubsPtr = clientData;
if (stubsPtr->hooks == NULL) {
static const char *errMsg = "missing stubInt table pointer";
NsfPrintError(interp, "Error loading package %s: "
"(requested version '%s', loaded version '%s'): %s",
packageName, version, actualVersion, errMsg);
actualVersion = NULL;
} else {
CONST86 NsfIntStubs *intStubsPtr;
intStubsPtr = stubsPtr->hooks->nsfIntStubs;
nsfStubsPtr = stubsPtr;
nsfIntStubsPtr = intStubsPtr;
}
}
}
return actualVersion;
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 2
* fill-column: 78
* indent-tabs-mode: nil
* End:
*/
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