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/* -*-c-*- -------------- mixvm_command.c :
* Implementation of the functions declared in mixvm_command.h
* ------------------------------------------------------------------
* $Id: mixvm_command.c,v 1.12 2005/09/20 19:43:13 jao Exp $
* ------------------------------------------------------------------
* Copyright (C) 2000, 2001, 2002, 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <mixlib/mix.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <mixlib/mix.h>
#ifdef HAVE_LIBREADLINE
# include <readline/readline.h>
# include <readline/history.h>
# ifndef HAVE_RL_COMPLETION_MATCHES /* old versions of rl don't use rl_ */
# define rl_completion_matches completion_matches
# endif
#else /* ! HAVE_LIBREADLINE */
typedef int Function ();
#endif /* HAVE_LIBREADLINE */
#include <mixlib/mix_vm.h>
#include <mixlib/mix_vm_dump.h>
#include <mixlib/mix_eval.h>
#include <mixlib/mix_src_file.h>
#include <mixlib/mix_vm_command.h>
#ifdef MAKE_GUILE
# include <mixguile/mixguile.h>
static gboolean
try_guile_ (char *line)
{
if (line[0] == '(')
{
if (line[strlen (line) -1] != ')') return FALSE;
mixguile_interpret_command (line);
return TRUE;
}
return FALSE;
}
#else /* !MAKE_GUILE */
# define try_guile_(ignored) FALSE
#endif /* MAKE_GUILE */
#include "mixvm_loop.h"
#include "mixvm_command.h"
/* mixvm dispatcher */
static mix_vm_cmd_dispatcher_t *dis_ = NULL;
static mix_config_t *config_ = NULL;
/* The names of functions that actually do the manipulation. */
#define DEC_FUN(name) \
static gboolean cmd_##name (mix_vm_cmd_dispatcher_t *dis, const char *arg)
DEC_FUN (shell_);
DEC_FUN (quit_);
DEC_FUN (prompt_);
mix_vm_command_info_t commands[] = {
{ "prompt", cmd_prompt_, N_("Set command prompt"), "prompt PROMPT" },
{ "shell", cmd_shell_, N_("Execute shell command"), "shell COMMAND" },
{ "quit", cmd_quit_, N_("Quit the program"), "quit" },
{ (char *)NULL, (Function *)NULL, (char *)NULL }
};
#ifdef HAVE_LIBREADLINE
/* readline functions */
static char *
mixvm_cmd_generator_ (const char *text, int state);
/* Attempt to complete on the contents of TEXT. START and END bound the
region of rl_line_buffer that contains the word to complete. TEXT is
the word to complete. We can use the entire contents of rl_line_buffer
in case we want to do some simple parsing. Return the array of matches,
or NULL if there aren't any. */
static char **
mixvm_cmd_completion_ (char *text, int start, int end)
{
char **matches;
matches = (char **)NULL;
/* If this word is at the start of the line, then it is a command
to complete. Otherwise it is the name of a file in the current
directory. */
if (start == 0)
matches = rl_completion_matches (text, mixvm_cmd_generator_);
return (matches);
}
/* Generator function for command completion. STATE lets us know whether
to start from scratch; without any state (i.e. STATE == 0), then we
start at the top of the list. */
static char *
mixvm_cmd_generator_ (const char *text, int state)
{
static const GList *comp = NULL;
char *prefix = NULL;
char *name = NULL;
/* If this is a new word to complete, initialize now. */
if (!state)
{
if (prefix) g_free (prefix);
comp = mix_vm_cmd_dispatcher_complete (dis_, text, &prefix);
}
/* Return the next name which partially matches from the command list. */
if (comp)
{
name = g_strdup ((const gchar *)comp->data);
comp = comp->next;
}
return name;
}
#endif /* HAVE_LIBREADLINE */
/* emacs interface */
static void
emacs_output_ (mix_vm_cmd_dispatcher_t *dis, const gchar *arg, gpointer data)
{
/* pek: probably bad that we snag the src w/every emacs_output_,
however when multiple files are supported then this will
have to be done each time (but the info will be snagged
from elsewhere...) */
const mix_vm_t *vm = mix_vm_cmd_dispatcher_get_vm (dis);
const mix_src_file_t *src = mix_vm_get_src_file (vm);
const gchar *path = mix_src_file_get_path (src);
mix_address_t loc = mix_vm_get_prog_count (vm);
guint lineno = mix_vm_get_address_lineno (vm, loc);
printf ("\032\032mixvm:%s%s:%d\n", path, MIX_SRC_DEFEXT, lineno);
return;
}
static int
cmd_quit_ (mix_vm_cmd_dispatcher_t *dis, const char *arg)
{
puts (_("Quitting ..."));
if (dis_) mix_vm_cmd_dispatcher_delete (dis_);
if (config_) mix_config_delete (config_);
exit (0);
/* pek: anything needed here to make the marker disappear??? */
return FALSE;
}
static int
cmd_shell_ (mix_vm_cmd_dispatcher_t *dis, const char *arg)
{
system (arg);
return TRUE;
}
static int
cmd_prompt_ (mix_vm_cmd_dispatcher_t *dis, const char *arg)
{
if (arg && strlen (arg)) mix_vmloop_set_prompt (arg);
return TRUE;
}
/* external interface */
static void
init_dis_ (mix_vm_cmd_dispatcher_t *dis)
{
static const gchar * envars[] = { "MDK_EDITOR", "X_EDITOR", "EDITOR",
"VISUAL" };
static const guint s = sizeof (envars) / sizeof (envars[0]);
static const gchar *editor = NULL;
gchar *edit = NULL;
if (!editor)
{
int k;
for (k = 0; k < s; k++)
if ( (editor = getenv (envars[k])) != NULL ) break;
}
if (!editor) editor = "vi";
edit = g_strconcat (editor, " %s", NULL);
mix_vm_cmd_dispatcher_set_editor (dis, edit);
g_free (edit);
mix_vm_cmd_dispatcher_set_assembler (dis, "mixasm %s");
}
mix_vm_cmd_dispatcher_t *
mixvm_cmd_init (mix_config_t *config, char *arg, gboolean use_emacs)
{
int k;
#ifdef HAVE_LIBREADLINE
/* Tell the completer that we want a crack first. */
rl_attempted_completion_function = (CPPFunction *)mixvm_cmd_completion_;
#endif /* HAVE_LIBREADLINE */
/* initialise the dispatcher */
config_ = config;
dis_ = mix_vm_cmd_dispatcher_new_with_config (stdout, stderr, config_);
if ( dis_ == NULL)
g_error (_("Failed initialisation (no memory resources)"));
init_dis_ (dis_);
/* add local commands */
k = 0;
while (commands[k].name)
{
mix_vm_cmd_dispatcher_register_new (dis_, commands + k);
++k;
}
/* install post hook for emacs interaction */
if (use_emacs)
{
mix_vm_cmd_dispatcher_post_hook (dis_, MIX_CMD_LOAD, emacs_output_, NULL);
mix_vm_cmd_dispatcher_post_hook (dis_, MIX_CMD_RUN, emacs_output_, NULL);
mix_vm_cmd_dispatcher_post_hook (dis_, MIX_CMD_NEXT, emacs_output_, NULL);
}
if (arg)
mix_vm_cmd_dispatcher_dispatch (dis_, MIX_CMD_LOAD, arg);
return dis_;
}
gboolean
mixvm_cmd_exec (char *line)
{
if (!line) return cmd_quit_(dis_, NULL);
/* strip white space */
line = g_strstrip(line);
if (strlen (line) == 0) return TRUE;
if (try_guile_ (line)) return TRUE;
(void)mix_vm_cmd_dispatcher_dispatch_text (dis_, line);
return TRUE;
}
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