| /* Definitions used by event-top.c, for GDB, the GNU debugger. |
| |
| Copyright 1999, 2001, 2003 Free Software Foundation, Inc. |
| |
| Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. |
| |
| 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. */ |
| |
| #ifndef EVENT_TOP_H |
| #define EVENT_TOP_H |
| |
| struct cmd_list_element; |
| |
| /* Stack for prompts. Each prompt is composed as a prefix, a prompt |
| and a suffix. The prompt to be displayed at any given time is the |
| one on top of the stack. A stack is necessary because of cases in |
| which the execution of a gdb command requires further input from |
| the user, like for instance 'commands' for breakpoints and |
| 'actions' for tracepoints. In these cases, the prompt is '>' and |
| gdb should process input using the asynchronous readline interface |
| and the event loop. In order to achieve this, we need to save |
| somewhere the state of GDB, i.e. that it is processing user input |
| as part of a command and not as part of the top level command loop. |
| The prompt stack represents part of the saved state. Another part |
| would be the function that readline would invoke after a whole line |
| of input has ben entered. This second piece would be something |
| like, for instance, where to return within the code for the actions |
| commands after a line has been read. This latter portion has not |
| beeen implemented yet. The need for a 3-part prompt arises from |
| the annotation level. When this is set to 2, the prompt is |
| actually composed of a prefix, the prompt itself and a suffix. */ |
| |
| /* At any particular time there will be always at least one prompt on |
| the stack, the one being currently displayed by gdb. If gdb is |
| using annotation level equal 2, there will be 2 prompts on the |
| stack: the usual one, w/o prefix and suffix (at top - 1), and the |
| 'composite' one with prefix and suffix added (at top). At this |
| time, this is the only use of the prompt stack. Resetting annotate |
| to 0 or 1, pops the top of the stack, resetting its size to one |
| element. The MAXPROMPTS limit is safe, for now. Once other cases |
| are dealt with (like the different prompts used for 'commands' or |
| 'actions') this array implementation of the prompt stack may have |
| to change. */ |
| |
| #define MAXPROMPTS 10 |
| struct prompts |
| { |
| struct |
| { |
| char *prefix; |
| char *prompt; |
| char *suffix; |
| } |
| prompt_stack[MAXPROMPTS]; |
| int top; |
| }; |
| |
| #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt |
| #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix |
| #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix |
| |
| /* Exported functions from event-top.c. |
| FIXME: these should really go into top.h. */ |
| |
| extern void display_gdb_prompt (char *new_prompt); |
| void gdb_setup_readline (void); |
| void gdb_disable_readline (void); |
| extern void async_init_signals (void); |
| extern void set_async_editing_command (char *args, int from_tty, |
| struct cmd_list_element *c); |
| extern void set_async_annotation_level (char *args, int from_tty, |
| struct cmd_list_element *c); |
| extern void set_async_prompt (char *args, int from_tty, |
| struct cmd_list_element *c); |
| |
| /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ |
| #ifndef STOP_SIGNAL |
| #include <signal.h> |
| #ifdef SIGTSTP |
| #define STOP_SIGNAL SIGTSTP |
| extern void handle_stop_sig (int sig); |
| #endif |
| #endif |
| extern void handle_sigint (int sig); |
| extern void pop_prompt (void); |
| extern void push_prompt (char *prefix, char *prompt, char *suffix); |
| extern void gdb_readline2 (void *client_data); |
| extern void mark_async_signal_handler_wrapper (void *token); |
| extern void async_request_quit (void *arg); |
| extern void stdin_event_handler (int error, void *client_data); |
| extern void async_disable_stdin (void); |
| extern void async_enable_stdin (void *dummy); |
| |
| /* Exported variables from event-top.c. |
| FIXME: these should really go into top.h. */ |
| |
| extern int async_command_editing_p; |
| extern int exec_done_display_p; |
| extern char *async_annotation_suffix; |
| extern char *new_async_prompt; |
| extern struct prompts the_prompts; |
| extern void (*call_readline) (void *); |
| extern void (*input_handler) (char *); |
| extern int input_fd; |
| extern void (*after_char_processing_hook) (void); |
| |
| extern void cli_command_loop (void); |
| |
| #endif |