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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2009-2012 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 3 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, see
<http://www.gnu.org/licenses/>. */
#include "mu_scm.h"
#include <setjmp.h>
static SCM
eval_catch_body (void *list)
{
return scm_primitive_eval ((SCM)list);
}
static SCM
eval_catch_handler (void *data, SCM tag, SCM throw_args)
{
scm_handle_by_message_noexit ("mailutils", tag, throw_args);
longjmp (*(jmp_buf*)data, 1);
}
struct scheme_exec_data
{
SCM (*handler) (void *data);
void *data;
SCM result;
};
static SCM
scheme_safe_exec_body (void *data)
{
struct scheme_exec_data *ed = data;
ed->result = ed->handler (ed->data);
return SCM_BOOL_F;
}
int
mu_guile_safe_exec (SCM (*handler) (void *data), void *data, SCM *result)
{
jmp_buf jmp_env;
struct scheme_exec_data ed;
if (setjmp (jmp_env))
return 1;
ed.handler = handler;
ed.data = data;
scm_c_catch (SCM_BOOL_T,
scheme_safe_exec_body, (void*)&ed,
eval_catch_handler, &jmp_env,
NULL, NULL);
if (result)
*result = ed.result;
return 0;
}
SCM
lookup_handler (void *data)
{
const char *symbol = (const char *)data;
return MU_SCM_SYMBOL_VALUE (symbol);
}
int
mu_guile_sym_lookup (const char *symbol, SCM *result)
{
return mu_guile_safe_exec (lookup_handler, (void*) symbol, result);
}
int
mu_guile_safe_proc_call (SCM proc, SCM arglist, SCM *presult)
{
jmp_buf jmp_env;
SCM cell, result;
if (setjmp (jmp_env))
return 1;
cell = scm_cons (proc, arglist);
result = scm_c_catch (SCM_BOOL_T,
eval_catch_body, cell,
eval_catch_handler, &jmp_env,
NULL, NULL);
if (presult)
*presult = result;
return 0;
}
void
mu_guile_init (int debug)
{
scm_init_guile ();
scm_load_goops ();
if (debug)
{
#ifdef GUILE_DEBUG_MACROS
SCM_DEVAL_P = 1;
SCM_BACKTRACE_P = 1;
SCM_RECORD_POSITIONS_P = 1;
SCM_RESET_DEBUG_MODE;
#endif
}
mu_scm_init ();
}
struct load_closure
{
const char *filename;
int argc;
char **argv;
};
static SCM
load_path_handler (void *data)
{
struct load_closure *lp = data;
scm_set_program_arguments (lp->argc, lp->argv, (char*)lp->filename);
scm_primitive_load (scm_from_locale_string (lp->filename));
return SCM_UNDEFINED;
}
int
mu_guile_load (const char *filename, int argc, char **argv)
{
struct load_closure lc;
lc.filename = filename;
lc.argc = argc;
lc.argv = argv;
return mu_guile_safe_exec (load_path_handler, &lc, NULL);
}
static SCM
eval_handler (void *data)
{
const char *string = data;
scm_c_eval_string (string);
return SCM_UNDEFINED;
}
int
mu_guile_eval (const char *string)
{
return mu_guile_safe_exec (eval_handler, (void*) string, NULL);
}
/* See comment on this function in mu_mailbox.c */
extern SCM mu_scm_mailbox_create0 (mu_mailbox_t mbox, int noclose);
int
mu_guile_mailbox_apply (mu_mailbox_t mbx, char *funcname)
{
SCM proc;
if (mu_guile_sym_lookup (funcname, &proc))
return MU_ERR_NOENT;
if (scm_procedure_p (proc) != SCM_BOOL_T)
return EINVAL;
if (mu_guile_safe_proc_call (proc,
scm_list_1 (mu_scm_mailbox_create0 (mbx, 1)),
NULL))
return MU_ERR_FAILURE;
return 0;
}
int
mu_guile_message_apply (mu_message_t msg, char *funcname)
{
SCM proc;
if (mu_guile_sym_lookup (funcname, &proc))
return MU_ERR_NOENT;
if (scm_procedure_p (proc) != SCM_BOOL_T)
return EINVAL;
if (mu_guile_safe_proc_call (proc,
scm_list_1 (mu_scm_message_create (SCM_BOOL_F, msg)),
NULL))
return MU_ERR_FAILURE;
return 0;
}
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