/* TUI Interpreter definitions for GDB, the GNU debugger. Copyright 2003 Free Software Foundation, Inc. This file is part of GDB. 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 "defs.h" #include "interps.h" #include "top.h" #include "event-top.h" #include "event-loop.h" #include "ui-out.h" #include "cli-out.h" #include "tui/tui-data.h" #include "readline/readline.h" #include "tui/tui-win.h" #include "tui/tui.h" #include "tui/tui-io.h" #include "exceptions.h" /* Set to 1 when the TUI mode must be activated when we first start gdb. */ static int tui_start_enabled = 0; /* Cleanup the tui before exiting. */ static void tui_exit (void) { /* Disable the tui. Curses mode is left leaving the screen in a clean state (see endwin()). */ tui_disable (); } /* These implement the TUI interpreter. */ static void * tui_init (void) { /* Install exit handler to leave the screen in a good shape. */ atexit (tui_exit); tui_initialize_static_data (); tui_initialize_io (); tui_initialize_readline (); return NULL; } static int tui_resume (void *data) { struct ui_file *stream; /* gdb_setup_readline will change gdb_stdout. If the TUI was previously writing to gdb_stdout, then set it to the new gdb_stdout afterwards. */ stream = cli_out_set_stream (tui_old_uiout, gdb_stdout); if (stream != gdb_stdout) { cli_out_set_stream (tui_old_uiout, stream); stream = NULL; } gdb_setup_readline (); if (stream != NULL) cli_out_set_stream (tui_old_uiout, gdb_stdout); if (tui_start_enabled) tui_enable (); return 1; } static int tui_suspend (void *data) { tui_start_enabled = tui_active; tui_disable (); return 1; } /* Display the prompt if we are silent. */ static int tui_display_prompt_p (void *data) { if (interp_quiet_p (NULL)) return 0; else return 1; } static struct gdb_exception tui_exec (void *data, const char *command_str) { internal_error (__FILE__, __LINE__, _("tui_exec called")); } /* Initialize all the necessary variables, start the event loop, register readline, and stdin, start the loop. */ static void tui_command_loop (void *data) { int length; char *a_prompt; char *gdb_prompt = get_prompt (); /* If we are using readline, set things up and display the first prompt, otherwise just print the prompt. */ if (async_command_editing_p) { /* Tell readline what the prompt to display is and what function it will need to call after a whole line is read. This also displays the first prompt. */ length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1; a_prompt = (char *) xmalloc (length); strcpy (a_prompt, PREFIX (0)); strcat (a_prompt, gdb_prompt); strcat (a_prompt, SUFFIX (0)); rl_callback_handler_install (a_prompt, input_handler); } else display_gdb_prompt (0); /* Loop until there is nothing to do. This is the entry point to the event loop engine. gdb_do_one_event, called via catch_errors() will process one event for each invocation. It blocks waits for an event and then processes it. >0 when an event is processed, 0 when catch_errors() caught an error and <0 when there are no longer any event sources registered. */ while (1) { int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL); if (result < 0) break; /* Update gdb output according to TUI mode. Since catch_errors preserves the uiout from changing, this must be done at top level of event loop. */ if (tui_active) uiout = tui_out; else uiout = tui_old_uiout; if (result == 0) { /* FIXME: this should really be a call to a hook that is interface specific, because interfaces can display the prompt in their own way. */ display_gdb_prompt (0); /* This call looks bizarre, but it is required. If the user entered a command that caused an error, after_char_processing_hook won't be called from rl_callback_read_char_wrapper. Using a cleanup there won't work, since we want this function to be called after a new prompt is printed. */ if (after_char_processing_hook) (*after_char_processing_hook) (); /* Maybe better to set a flag to be checked somewhere as to whether display the prompt or not. */ } } /* We are done with the event loop. There are no more event sources to listen to. So we exit GDB. */ return; } void _initialize_tui_interp (void) { static const struct interp_procs procs = { tui_init, tui_resume, tui_suspend, tui_exec, tui_display_prompt_p, tui_command_loop, }; struct interp *tui_interp; /* Create a default uiout builder for the TUI. */ tui_out = tui_out_new (gdb_stdout); interp_add (interp_new ("tui", NULL, tui_out, &procs)); if (interpreter_p && strcmp (interpreter_p, "tui") == 0) tui_start_enabled = 1; /* APPLE LOCAL: We don't test the TUI interpreter, and we don't by any means want it to be the default interpreter. */ #if 0 if (interpreter_p && strcmp (interpreter_p, INTERP_CONSOLE) == 0) { xfree (interpreter_p); interpreter_p = xstrdup ("tui"); } #endif }