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/* -*-c-*- -------------- mixguile_cmd_dispatcher.c :
* Implementation of the functions declared in mixguile_cmd_dispatcher.h
* ------------------------------------------------------------------
* Last change: Time-stamp: "01/08/22 02:29:34 jao"
* ------------------------------------------------------------------
* Copyright (C) 2001 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 of the License, 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 program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <guile/gh.h>
#include "mixguile.h"
#include "xmixguile_cmd_dispatcher.h"
/* create/destroy cmd dispatcher */
mixguile_cmd_dispatcher_t *
mixguile_cmd_dispatcher_new (mix_vm_cmd_dispatcher_t *dis)
{
static gboolean REGISTERED = FALSE;
mixguile_cmd_dispatcher_t *result = NULL;
int fildes[2], r;
FILE *out;
g_return_val_if_fail (dis != NULL, NULL);
if (!REGISTERED)
{
register_scm_commands_ (DEFAULT_SCM_COMMANDS_);
REGISTERED = TRUE;
}
r = pipe (fildes);
g_return_val_if_fail (r == 0, NULL);
out = fdopen (fildes[1], "w");
g_return_val_if_fail (out != NULL, NULL);
r = fcntl (fildes[0], F_GETFL, 0);
g_return_val_if_fail (r != -1, NULL);
r = fcntl (fildes[0], F_SETFL, r | O_NONBLOCK);
g_return_val_if_fail (r != -1, NULL);
result = g_new (mixguile_cmd_dispatcher_t, 1);
result->dispatcher = dis;
result->err = result->out = NULL;
result->guile_out = out;
result->fildes[0] = fildes[0];
result->fildes[1] = fildes[1];
result->result = NULL;
register_cmd_dispatcher_ (result);
return result;
}
void
mixguile_cmd_dispatcher_delete (mixguile_cmd_dispatcher_t *dis)
{
g_return_if_fail (dis != NULL);
fclose (dis->guile_out);
close (dis->fildes[0]);
close (dis->fildes[1]);
mix_vm_cmd_dispatcher_delete (dis->dispatcher);
}
/* get the underlying vm dispatcher */
mix_vm_cmd_dispatcher_t *
mixguile_cmd_dispatcher_get_vm_dispatcher (const mixguile_cmd_dispatcher_t *dis)
{
g_return_val_if_fail (dis != NULL, NULL);
return dis->dispatcher;
}
/* get the result string of last executed command */
const gchar *
mixguile_cmd_dispatcher_last_result (mixguile_cmd_dispatcher_t *dis)
{
enum {BLKSIZE = 256};
static gchar BUFFER[BLKSIZE + 1];
ssize_t k;
gchar *tmp = NULL;
g_return_val_if_fail (dis != NULL, NULL);
if (dis->result) g_free (dis->result);
dis->result = NULL;
fflush (dis->guile_out);
while ((k = read (dis->fildes[0], BUFFER, BLKSIZE)) != 0)
{
if (k == -1 && errno != EINTR) break;
if (k != -1)
{
tmp = dis->result;
BUFFER[k] = '\0';
dis->result = g_strconcat (tmp ? tmp : "", BUFFER, NULL);
g_free (tmp);
}
}
if (dis->result && dis->result[strlen (dis->result) - 1] == '\n')
dis->result[strlen (dis->result) - 1] = '\0';
return dis->result;
}
/* prepare dispatcher for repl */
static void
prepare_dispatcher_ (mixguile_cmd_dispatcher_t *dis)
{
dis->out = mix_vm_cmd_dispatcher_set_out_stream (dis->dispatcher,
dis->guile_out);
dis->err = mix_vm_cmd_dispatcher_set_error_stream (dis->dispatcher,
dis->guile_out);
}
void
mixguile_cmd_dispatcher_prepare (mixguile_cmd_dispatcher_t *dis)
{
g_return_if_fail (dis != NULL);
prepare_dispatcher_ (dis);
}
/* interpret commands from file or string */
static void
reset_dispatcher_ (mixguile_cmd_dispatcher_t *dis)
{
(void) mix_vm_cmd_dispatcher_set_out_stream (dis->dispatcher, dis->out);
(void) mix_vm_cmd_dispatcher_set_error_stream (dis->dispatcher, dis->err);
}
void
mixguile_cmd_dispatcher_interpret_file (mixguile_cmd_dispatcher_t *dis,
const gchar *path)
{
g_return_if_fail (dis != NULL);
g_return_if_fail (path != NULL);
prepare_dispatcher_ (dis);
(void) gh_eval_file ((char *)path);
reset_dispatcher_ (dis);
}
void
mixguile_cmd_dispatcher_interpret_command (mixguile_cmd_dispatcher_t *dis,
const gchar *command)
{
g_return_if_fail (dis != NULL);
g_return_if_fail (command != NULL);
prepare_dispatcher_ (dis);
(void) gh_eval_str ((char *)command);
reset_dispatcher_ (dis);
}
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