diff options
Diffstat (limited to 'gdb/tui/tui-interp.c')
| -rw-r--r-- | gdb/tui/tui-interp.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/gdb/tui/tui-interp.c b/gdb/tui/tui-interp.c new file mode 100644 index 00000000000..f935ea4094c --- /dev/null +++ b/gdb/tui/tui-interp.c @@ -0,0 +1,180 @@ +/* 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 "tui/tuiData.h" +#include "readline/readline.h" +#include "tui/tuiWin.h" +#include "tui/tui.h" +#include "tui/tuiIO.h" + +/* 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); + + initializeStaticData (); + + tui_initialize_io (); + tui_initialize_readline (); + + return NULL; +} + +static int +tui_resume (void *data) +{ + gdb_setup_readline (); + tui_enable (); + return 1; +} + +static int +tui_suspend (void *data) +{ + 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 int +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)); +} |