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authorrjohnson <rjohnson@noemail.net>1998-03-26 14:56:54 (GMT)
committerrjohnson <rjohnson@noemail.net>1998-03-26 14:56:54 (GMT)
commitf3d590299d8632bc7d324901d27250ed07a6f074 (patch)
treec168cc164a71f320db9dcdfe7518ba7bd0d2c8d9 /unix/tclLoadNext.c
parent26a76b6c669bbb7629454ffa56a7f3f501a86dae (diff)
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Initial revision
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+/*
+ * tclLoadNext.c --
+ *
+ * This procedure provides a version of the TclLoadFile that
+ * works with NeXTs rld_* dynamic loading. This file provided
+ * by Pedja Bogdanovich.
+ *
+ * Copyright (c) 1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tclLoadNext.c 1.4 96/02/15 11:58:55
+ */
+
+#include "tclInt.h"
+#include <mach-o/rld.h>
+#include <streams/streams.h>
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclLoadFile --
+ *
+ * Dynamically loads a binary code file into memory and returns
+ * the addresses of two procedures within that file, if they
+ * are defined.
+ *
+ * Results:
+ * A standard Tcl completion code. If an error occurs, an error
+ * message is left in interp->result. *proc1Ptr and *proc2Ptr
+ * are filled in with the addresses of the symbols given by
+ * *sym1 and *sym2, or NULL if those symbols can't be found.
+ *
+ * Side effects:
+ * New code suddenly appears in memory.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclLoadFile(interp, fileName, sym1, sym2, proc1Ptr, proc2Ptr)
+ Tcl_Interp *interp; /* Used for error reporting. */
+ char *fileName; /* Name of the file containing the desired
+ * code. */
+ char *sym1, *sym2; /* Names of two procedures to look up in
+ * the file's symbol table. */
+ Tcl_PackageInitProc **proc1Ptr, **proc2Ptr;
+ /* Where to return the addresses corresponding
+ * to sym1 and sym2. */
+{
+ struct mach_header *header;
+ char *data;
+ int len, maxlen;
+ char *files[]={fileName,NULL};
+ NXStream *errorStream=NXOpenMemory(0,0,NX_READWRITE);
+
+ if(!rld_load(errorStream,&header,files,NULL)) {
+ NXGetMemoryBuffer(errorStream,&data,&len,&maxlen);
+ Tcl_AppendResult(interp,"couldn't load file \"",fileName,"\": ",data,NULL);
+ NXCloseMemory(errorStream,NX_FREEBUFFER);
+ return TCL_ERROR;
+ }
+ NXCloseMemory(errorStream,NX_FREEBUFFER);
+
+ *proc1Ptr=NULL;
+ if(sym1) {
+ char sym[strlen(sym1)+2];
+ sym[0]='_'; sym[1]=0; strcat(sym,sym1);
+ rld_lookup(NULL,sym,(unsigned long *)proc1Ptr);
+ }
+
+ *proc2Ptr=NULL;
+ if(sym2) {
+ char sym[strlen(sym2)+2];
+ sym[0]='_'; sym[1]=0; strcat(sym,sym2);
+ rld_lookup(NULL,sym,(unsigned long *)proc2Ptr);
+ }
+
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclGuessPackageName --
+ *
+ * If the "load" command is invoked without providing a package
+ * name, this procedure is invoked to try to figure it out.
+ *
+ * Results:
+ * Always returns 0 to indicate that we couldn't figure out a
+ * package name; generic code will then try to guess the package
+ * from the file name. A return value of 1 would have meant that
+ * we figured out the package name and put it in bufPtr.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclGuessPackageName(fileName, bufPtr)
+ char *fileName; /* Name of file containing package (already
+ * translated to local form if needed). */
+ Tcl_DString *bufPtr; /* Initialized empty dstring. Append
+ * package name to this if possible. */
+{
+ return 0;
+}