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authorJose Antonio Ortega Ruiz <jao@gnu.org>2006-03-20 22:46:46 +0000
committerJose Antonio Ortega Ruiz <jao@gnu.org>2006-03-20 22:46:46 +0000
commit300160e73da486946ae513f1d039dcd7b85ff17c (patch)
treef26691ff724b57dac450ab47e4eea91e63cdadc1 /mixutils/mixvm_command.c
parent50375f34b611281a3b05a37221e2baa143f5f5ca (diff)
downloadmdk-300160e73da486946ae513f1d039dcd7b85ff17c.tar.gz
mdk-300160e73da486946ae513f1d039dcd7b85ff17c.tar.bz2
Version 1.2.1 imported1.2.1
git-archimport-id: mdk@sv.gnu.org/mdk--devel--1--patch-1
Diffstat (limited to 'mixutils/mixvm_command.c')
-rw-r--r--mixutils/mixvm_command.c270
1 files changed, 270 insertions, 0 deletions
diff --git a/mixutils/mixvm_command.c b/mixutils/mixvm_command.c
new file mode 100644
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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;
+}