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+/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
+
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of GUILE.
+ *
+ * The exception is that, if you link the GUILE library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the GUILE library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name GUILE. If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * GUILE, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way. To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for GUILE, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice.
+ */
+
+
+/* Guile high level (gh_) interface, initialization-related stuff */
+
+#include <stdio.h>
+
+#include <gh.h>
+
+typedef void (*main_prog_t) (int argc, char **argv);
+typedef void (*repl_prog_t) (int argc, char **argv);
+
+/* This function takes care of all real GH initialization. Since it's
+ called by scm_boot_guile, it can safely work with heap objects, or
+ call functions that do so. */
+static void
+gh_launch_pad (void *closure, int argc, char **argv)
+{
+ main_prog_t c_main_prog = (main_prog_t) closure;
+
+ gh_eval_str ("(primitive-load-path \"ice-9/boot-9.scm\")");
+ c_main_prog (argc, argv);
+ exit (0);
+}
+
+
+/* starts up the Scheme interpreter, and stays in it. c_main_prog()
+ is the address of the user's main program, since gh_enter() never
+ returns. */
+void
+gh_enter (int argc, char *argv[], main_prog_t c_main_prog)
+{
+ scm_boot_guile (argc, argv, gh_launch_pad, c_main_prog);
+ /* never returns */
+}
+
+/* offer a REPL to the C programmer; for now I just invoke the ice-9
+ REPL that is written in Scheme */
+void
+gh_repl ()
+{
+/* gh_eval_str("(primitive-load-path \"ice-9/boot-9.scm\")"); */
+ gh_eval_str ("(top-repl)");
+}
+
+/* libguile programmers need exception handling mechanisms; here is
+ the recommended way of doing it with the gh_ interface */
+
+/* gh_catch() -- set up an exception handler for a particular type of
+ error (or any thrown error if tag is SCM_BOOL_T); see
+ ../libguile/throw.c for the comments explaining scm_internal_catch */
+SCM
+gh_catch (SCM tag, scm_catch_body_t body, void *body_data,
+ scm_catch_handler_t handler, void *handler_data)
+{
+ return scm_internal_catch (tag, body, body_data, handler, handler_data);
+}
+
+SCM
+gh_standard_handler (void *data, SCM tag, SCM throw_args)
+{
+ fprintf (stderr, "\nJust got an error; tag is\n ");
+ scm_display (tag, scm_current_output_port ());
+ scm_newline (scm_current_output_port ());
+ scm_newline (scm_current_output_port ());
+
+ return SCM_BOOL_F;
+}