Initial revision

FossilOrigin-Name: f86c34e38d2a946e0ed196001fd756c57f90791a

1 files changed, 111 insertions, 0 deletions

diff --git a/unix/tclLoadNext.c b/unix/tclLoadNext.c
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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;
+}