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Diffstat (limited to 'libguile/gh_init.c')
-rw-r--r-- | libguile/gh_init.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/libguile/gh_init.c b/libguile/gh_init.c new file mode 100644 index 000000000..50517d441 --- /dev/null +++ b/libguile/gh_init.c @@ -0,0 +1,107 @@ +/* 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; +} |