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-rw-r--r--mixutils/mixvm_command.c367
1 files changed, 367 insertions, 0 deletions
diff --git a/mixutils/mixvm_command.c b/mixutils/mixvm_command.c
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+/* -*-c-*- -------------- mixvm_command.c :
+ * Implementation of the functions declared in mixvm_command.h
+ * ------------------------------------------------------------------
+ * Copyright (C) 2000, 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 <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>
+#else
+ 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>
+#include "mixvm_command.h"
+
+/* The names of functions that actually do the manipulation. */
+#define DEC_FUN(name) \
+static int cmd_##name (char *arg)
+
+DEC_FUN (help_);
+DEC_FUN (shell_);
+DEC_FUN (compile_);
+DEC_FUN (edit_);
+DEC_FUN (quit_);
+
+/* A structure which contains information on the commands this program
+ can understand. */
+typedef struct {
+ const char *name; /* User printable name of the function. */
+ Function *func; /* Function to call to do the job. */
+ const char *doc; /* Documentation for this function. */
+ const char *usage; /* Usage */
+} COMMAND;
+
+COMMAND commands[] = {
+ { "help", cmd_help_, N_("Display this text"), "help [COMMAND]" },
+ { "shell", cmd_shell_, N_("Execute shell command"), "shell COMMAND" },
+ { "compile", cmd_compile_, N_("Compile a source file"), "compile FILENAME"},
+ { "edit", cmd_edit_, N_("Edit a source file"), "edit FILENAME"},
+ { "quit", cmd_quit_, N_("Quit the program"), "quit" },
+ { (char *)NULL, (Function *)NULL, (char *)NULL }
+};
+
+#define LOCAL_COMANDS_NO_ ((sizeof (commands) / sizeof (commands[0])) - 1)
+#define MIX_COMMANDS_NO_ MIX_CMD_INVALID+1
+#define ALL_COMMANDS_NO_ LOCAL_COMANDS_NO_+MIX_COMMANDS_NO_
+
+static const char *mix_commands_[ALL_COMMANDS_NO_] = {NULL};
+
+
+
+#ifdef HAVE_LIBREADLINE
+/* readline functions */
+static char *
+mixvm_cmd_generator_ (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 = 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_ (char *text, int state)
+{
+ static int list_index, len;
+ const char *name;
+
+ /* If this is a new word to complete, initialize now. This includes
+ saving the length of TEXT for efficiency, and initializing the index
+ variable to 0. */
+ if (!state)
+ {
+ list_index = 0;
+ len = strlen (text);
+ }
+
+ /* Return the next name which partially matches from the command list. */
+ while ((name = mix_commands_[list_index]) != NULL)
+ {
+ list_index++;
+ if (strncmp (name, text, len) == 0)
+ return (g_strdup (name));
+ }
+
+ /* If no names matched, then return NULL. */
+ return ((char *)NULL);
+}
+#endif /* HAVE_LIBREADLINE */
+
+/* command functions */
+static COMMAND *
+find_command_ (const char *name)
+{
+ int i;
+
+ for (i = 0; commands[i].name; i++)
+ if (strcmp (name, commands[i].name) == 0)
+ return (&commands[i]);
+
+ return ((COMMAND *)NULL);
+}
+
+
+/* mixvm dispatcher */
+static mix_vm_cmd_dispatcher_t *dis_ = NULL;
+
+/* 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_help_ (char *arg)
+{
+ int i;
+ int printed = 0;
+
+ for (i = 0; commands[i].name; i++)
+ {
+ if (!*arg || (strcmp (arg, commands[i].name) == 0))
+ {
+ printf (_("%s\t\t%s. Usage: %s\n"), commands[i].name,
+ _(commands[i].doc), commands[i].usage);
+ printed++;
+ }
+ }
+
+ if (printed > 1) printf ("\n");
+
+ for (i = LOCAL_COMANDS_NO_ + 1 /* skip help cmd */; mix_commands_[i]; i++)
+ {
+ if (!*arg || (strcmp (arg, mix_commands_[i]) == 0))
+ {
+ printf (_("%s\t\t%s. Usage: %s\n"), mix_commands_[i],
+ mix_vm_command_help (i - LOCAL_COMANDS_NO_),
+ mix_vm_command_usage (i - LOCAL_COMANDS_NO_));
+ printed++;
+ }
+ }
+
+ if (!printed) printf ("Command \'%s\' not found\n", arg);
+
+ return TRUE;
+
+}
+
+static int
+cmd_quit_ (char *arg)
+{
+ puts ("Quitting ...");
+ if ( dis_ ) mix_vm_cmd_dispatcher_delete (dis_);
+
+ /* pek: anything needed here to make the marker disappear??? */
+ return FALSE;
+}
+
+
+static int
+cmd_shell_ (char *arg)
+{
+ system (arg);
+ return TRUE;
+}
+
+static int
+cmd_compile_ (char *arg)
+{
+ gchar *line;
+
+ if ( strlen (arg) == 0 )
+ return cmd_help_ ("compile");
+
+ line = g_strconcat ("mixasm -g ", arg, NULL);
+ if ( system (line) == EXIT_SUCCESS )
+ fputs (_("Successful compilation\n"), stderr);
+ g_free (line);
+
+ return TRUE;
+}
+
+static int
+cmd_edit_ (char *arg)
+{
+ static const gchar * envars[] = { "MDK_EDITOR", "X_EDITOR", "EDITOR",
+ "VISUAL" };
+
+ static const guint s = sizeof (envars) / sizeof (envars[0]);
+ static const gchar *editor = NULL;
+
+ if ( strlen (arg) == 0 )
+ return cmd_help_ ("edit");
+
+ if (!editor)
+ {
+ int k;
+ for (k = 0; k < s; k++)
+ if ( (editor = getenv (envars[k])) != NULL ) break;
+ }
+ if (!editor)
+ {
+ int k;
+ fputs (_("Cannot find editor ("), stderr);
+ for (k = 0; k < s; k++)
+ fprintf (stderr, "%s ", envars[k]);
+ fputs (_("undefined)\n"), stderr);
+ }
+ else
+ {
+ gchar *line = g_strconcat (editor, " ", arg, NULL);
+ system (line);
+ g_free (line);
+ }
+
+ return TRUE;
+}
+
+
+
+/* external interface */
+void
+mixvm_cmd_init (char *arg, gboolean use_emacs)
+{
+ int k;
+ /* get local command names */
+ for (k = 0; k < LOCAL_COMANDS_NO_; ++k)
+ mix_commands_[k] = commands[k].name;
+ /* get external command names */
+ for (k = 0; k < MIX_CMD_INVALID; ++k)
+ mix_commands_[k + LOCAL_COMANDS_NO_] = mix_vm_command_to_string (k);
+ mix_commands_[ALL_COMMANDS_NO_ - 1] = NULL;
+
+#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 */
+ dis_ = mix_vm_cmd_dispatcher_new (stdout, stderr);
+
+ if ( dis_ == NULL)
+ g_error (_("Failed initialisation (no memory resources)"));
+
+ /* 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);
+}
+
+gboolean
+mixvm_cmd_exec (char *line)
+{
+ int i;
+ COMMAND *command;
+ char *cmd, *arg;
+ mix_vm_command_t mix_cmd;
+
+ if (!line) return cmd_quit_(NULL);
+
+ /* strip white space */
+ line = g_strstrip(line);
+
+ /* Isolate the command word. */
+ i = 0;
+ while (line[i] && isspace (line[i]))
+ i++;
+ cmd = line + i;
+
+ while (line[i] && !isspace (line[i]))
+ i++;
+
+ if (line[i])
+ line[i++] = '\0';
+
+ if (cmd == NULL || strlen (cmd) == 0)
+ return TRUE;
+
+ /* Get argument to command, if any. */
+ while (isspace (line[i]))
+ i++;
+
+ arg = line + i;
+
+ /* try to find local command */
+ command = find_command_ (cmd);
+ if (command)
+ return ((*(command->func)) (arg));
+
+ /* try to find mix command */
+ mix_cmd = mix_vm_command_from_string (cmd);
+
+ if (mix_cmd == MIX_CMD_INVALID)
+ fprintf (stderr, _("%s: No such command. Try \'help\'\n"), cmd);
+ else
+ mix_vm_cmd_dispatcher_dispatch (dis_, mix_cmd, arg);
+
+ return TRUE;
+}
+
+