1 files changed, 270 insertions, 0 deletions
diff --git a/mixutils/mixvm_command.c b/mixutils/mixvm_command.c
new file mode 100644
index 0000000..0fbe1ce
--- /dev/null
+++ b/mixutils/mixvm_command.c
@@ -0,0 +1,270 @@
+/* -*-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;
+}