Initial revision

1 files changed, 129 insertions, 0 deletions

diff --git a/unix/tclLoadShl.c b/unix/tclLoadShl.c
new file mode 100644
index 0000000..2f290ab
--- /dev/null
+++ b/unix/tclLoadShl.c
@@ -0,0 +1,129 @@
+/* 
+ * tclLoadShl.c --
+ *
+ *	This procedure provides a version of the TclLoadFile that works
+ *	with the "shl_load" and "shl_findsym" library procedures for
+ *	dynamic loading (e.g. for HP machines).
+ *
+ * Copyright (c) 1995-1996 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: @(#) tclLoadShl.c 1.5 96/03/15 15:01:44
+ */
+
+#include <dl.h>
+
+/*
+ * On some HP machines, dl.h defines EXTERN; remove that definition.
+ */
+
+#ifdef EXTERN
+#   undef EXTERN
+#endif
+
+#include "tcl.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. */
+{
+    shl_t handle;
+    Tcl_DString newName;
+
+    handle = shl_load(fileName, BIND_IMMEDIATE, 0L);
+    if (handle == NULL) {
+	Tcl_AppendResult(interp, "couldn't load file \"", fileName,
+		"\": ", Tcl_PosixError(interp), (char *) NULL);
+	return TCL_ERROR;
+    }
+
+    /*
+     * Some versions of the HP system software still use "_" at the
+     * beginning of exported symbols while others don't;  try both
+     * forms of each name.
+     */
+
+    if (shl_findsym(&handle, sym1, (short) TYPE_PROCEDURE, (void *) proc1Ptr)
+	    != 0) {
+	Tcl_DStringInit(&newName);
+	Tcl_DStringAppend(&newName, "_", 1);
+	Tcl_DStringAppend(&newName, sym1, -1);
+	if (shl_findsym(&handle, Tcl_DStringValue(&newName),
+		(short) TYPE_PROCEDURE, (void *) proc1Ptr) != 0) {
+	    *proc1Ptr = NULL;
+	}
+	Tcl_DStringFree(&newName);
+    }
+    if (shl_findsym(&handle, sym2, (short) TYPE_PROCEDURE, (void *) proc2Ptr)
+	    != 0) {
+	Tcl_DStringInit(&newName);
+	Tcl_DStringAppend(&newName, "_", 1);
+	Tcl_DStringAppend(&newName, sym2, -1);
+	if (shl_findsym(&handle, Tcl_DStringValue(&newName),
+		(short) TYPE_PROCEDURE, (void *) proc2Ptr) != 0) {
+	    *proc2Ptr = NULL;
+	}
+	Tcl_DStringFree(&newName);
+    }
+    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;
+}