Import guile-1.8 as multiple upstream tarball component

[lilypond.git] / guile18 / libguile / gh_init.c

diff --git a/guile18/libguile/gh_init.c b/guile18/libguile/gh_init.c
new file mode 100644 (file)
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+++ b/guile18/libguile/gh_init.c
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+/* Copyright (C) 1995,1996,1997,2000,2001, 2006, 2008 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+\f
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Guile high level (gh_) interface, initialization-related stuff */
+
+#include <stdio.h>
+
+#include "libguile/gh.h"
+
+#if SCM_ENABLE_DEPRECATED
+
+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;
+
+  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, (void *) 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 (int argc, char *argv[])
+{
+/*   gh_eval_str ("(top-repl)"); */
+  scm_shell (argc, argv);
+}
+
+/* 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_t_catch_body body, void *body_data,
+         scm_t_catch_handler handler, void *handler_data)
+{
+  return scm_internal_catch (tag, body, body_data, handler, handler_data);
+}
+
+SCM 
+gh_standard_handler (void *data SCM_UNUSED, SCM tag, SCM throw_args SCM_UNUSED)
+{
+  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;
+}
+
+#endif /* SCM_ENABLE_DEPRECATED */
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/