115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
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/*
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* tclWinLoad.c --
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*
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* This procedure provides a version of the TclLoadFile that
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* works with the Windows "LoadLibrary" and "GetProcAddress"
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* API for dynamic loading.
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*
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* Copyright (c) 1995 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* SCCS: @(#) tclWinLoad.c 1.6 96/02/15 11:54:07
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*/
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#include "tclInt.h"
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#include "tclPort.h"
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/*
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*----------------------------------------------------------------------
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*
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* TclLoadFile --
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*
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* Dynamically loads a binary code file into memory and returns
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* the addresses of two procedures within that file, if they
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* are defined.
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*
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* Results:
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* A standard Tcl completion code. If an error occurs, an error
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* message is left in interp->result.
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*
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* Side effects:
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* New code suddenly appears in memory.
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*
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*----------------------------------------------------------------------
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*/
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int
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TclLoadFile(interp, fileName, sym1, sym2, proc1Ptr, proc2Ptr)
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Tcl_Interp *interp; /* Used for error reporting. */
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char *fileName; /* Name of the file containing the desired
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* code. */
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char *sym1, *sym2; /* Names of two procedures to look up in
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* the file's symbol table. */
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Tcl_PackageInitProc **proc1Ptr, **proc2Ptr;
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/* Where to return the addresses corresponding
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* to sym1 and sym2. */
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{
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HINSTANCE handle;
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char *buffer;
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handle = TclWinLoadLibrary(fileName);
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if (handle == NULL) {
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Tcl_AppendResult(interp, "couldn't load file \"", fileName,
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"\": ", Tcl_PosixError(interp), (char *) NULL);
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return TCL_ERROR;
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}
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/*
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* For each symbol, check for both Symbol and _Symbol, since Borland
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* generates C symbols with a leading '_' by default.
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*/
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*proc1Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, sym1);
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if (*proc1Ptr == NULL) {
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buffer = ckalloc(strlen(sym1)+2);
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buffer[0] = '_';
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strcpy(buffer+1, sym1);
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*proc1Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, buffer);
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ckfree(buffer);
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}
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*proc2Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, sym2);
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if (*proc2Ptr == NULL) {
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buffer = ckalloc(strlen(sym2)+2);
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buffer[0] = '_';
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strcpy(buffer+1, sym2);
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*proc2Ptr = (Tcl_PackageInitProc *) GetProcAddress(handle, buffer);
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ckfree(buffer);
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}
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return TCL_OK;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TclGuessPackageName --
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*
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* If the "load" command is invoked without providing a package
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* name, this procedure is invoked to try to figure it out.
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*
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* Results:
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* Always returns 0 to indicate that we couldn't figure out a
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* package name; generic code will then try to guess the package
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* from the file name. A return value of 1 would have meant that
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* we figured out the package name and put it in bufPtr.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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int
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TclGuessPackageName(fileName, bufPtr)
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char *fileName; /* Name of file containing package (already
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* translated to local form if needed). */
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Tcl_DString *bufPtr; /* Initialized empty dstring. Append
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* package name to this if possible. */
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{
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return 0;
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}
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