/* Top level stuff for GDB, the GNU debugger.
- Copyright (C) 1986-2016 Free Software Foundation, Inc.
+ Copyright (C) 1986-2017 Free Software Foundation, Inc.
This file is part of GDB.
struct tl_interp_info;
+/* Prompt state. */
+
+enum prompt_state
+{
+ /* The command line is blocked simulating synchronous execution.
+ This is used to implement the foreground execution commands
+ ('run', 'continue', etc.). We won't display the prompt and
+ accept further commands until the execution is actually over. */
+ PROMPT_BLOCKED,
+
+ /* The command finished; display the prompt before returning back to
+ the top level. */
+ PROMPT_NEEDED,
+
+ /* We've displayed the prompt already, ready for input. */
+ PROMPTED,
+};
+
/* All about a user interface instance. Each user interface has its
own I/O files/streams, readline state, its own top level
interpreter (for the main UI, this is the interpreter specified
/* Pointer to next in singly-linked list. */
struct ui *next;
+ /* Convenient handle (UI number). Unique across all UIs. */
+ int num;
+
/* The UI's command line buffer. This is to used to accumulate
input until we have a whole command line. */
struct buffer line_buffer;
processing. */
void (*input_handler) (char *);
+ /* True if this UI is using the readline library for command
+ editing; false if using GDB's own simple readline emulation, with
+ no editing support. */
+ int command_editing;
+
/* Each UI has its own independent set of interpreters. */
struct ui_interp_info *interp_info;
"start" -ex "next"') are processed. */
int async;
+ /* The number of nested readline secondary prompts that are
+ currently active. */
+ int secondary_prompt_depth;
+
+ /* The UI's stdin. Set to stdin for the main UI. */
+ FILE *stdin_stream;
+
+ /* stdio stream that command input is being read from. Set to stdin
+ normally. Set by source_command to the file we are sourcing.
+ Set to NULL if we are executing a user-defined command or
+ interacting via a GUI. */
+ FILE *instream;
+ /* Standard output stream. */
+ FILE *outstream;
+ /* Standard error stream. */
+ FILE *errstream;
+
+ /* The file descriptor for the input stream, so that we can register
+ it with the event loop. */
+ int input_fd;
+
+ /* Whether ISATTY returns true on input_fd. Cached here because
+ quit_force needs to know this _after_ input_fd might be
+ closed. */
+ int input_interactive_p;
+
+ /* See enum prompt_state's description. */
+ enum prompt_state prompt_state;
+
/* The fields below that start with "m_" are "private". They're
meant to be accessed through wrapper macros that make them look
like globals. */
*_unfiltered. In the very near future that restriction shall be
removed - either call shall be unfiltered. (cagney 1999-06-13). */
struct ui_file *m_gdb_stdlog;
+
+ /* The current ui_out. */
+ struct ui_out *m_current_uiout;
};
/* The main UI. This is the UI that is bound to stdin/stdout/stderr.
/* The list of all UIs. */
extern struct ui *ui_list;
-/* State for SWITCH_THRU_ALL_UIS. Declared here because it is meant
- to be created on the stack, but should be treated as opaque. */
-struct switch_thru_all_uis
+/* State for SWITCH_THRU_ALL_UIS. */
+class switch_thru_all_uis
{
- struct ui *iter;
- struct cleanup *old_chain;
+public:
+
+ switch_thru_all_uis () : m_iter (ui_list), m_save_ui (¤t_ui)
+ {
+ current_ui = ui_list;
+ }
+
+ /* If done iterating, return true; otherwise return false. */
+ bool done () const
+ {
+ return m_iter == NULL;
+ }
+
+ /* Move to the next UI, setting current_ui if iteration is not yet
+ complete. */
+ void next ()
+ {
+ m_iter = m_iter->next;
+ if (m_iter != NULL)
+ current_ui = m_iter;
+ }
+
+ private:
+
+ /* No need for these. They are intentionally not defined
+ anywhere. */
+ switch_thru_all_uis &operator= (const switch_thru_all_uis &);
+ switch_thru_all_uis (const switch_thru_all_uis &);
+
+ /* Used to iterate through the UIs. */
+ struct ui *m_iter;
+
+ /* Save and restore current_ui. */
+ scoped_restore_tmpl<struct ui *> m_save_ui;
};
-/* Functions to drive SWITCH_THRU_ALL_UIS. Though declared here by
- necessity, these functions should not be used other than via the
- SWITCH_THRU_ALL_UIS macro defined below. */
-extern void switch_thru_all_uis_init (struct switch_thru_all_uis *state);
-extern int switch_thru_all_uis_cond (struct switch_thru_all_uis *state);
-extern void switch_thru_all_uis_next (struct switch_thru_all_uis *state);
-
/* Traverse through all UI, and switch the current UI to the one
being iterated. */
-#define SWITCH_THRU_ALL_UIS(STATE) \
- for (switch_thru_all_uis_init (&STATE); \
- switch_thru_all_uis_cond (&STATE); \
- switch_thru_all_uis_next (&STATE))
+#define SWITCH_THRU_ALL_UIS() \
+ for (switch_thru_all_uis stau_state; !stau_state.done (); stau_state.next ())
+
+/* Traverse over all UIs. */
+#define ALL_UIS(UI) \
+ for (UI = ui_list; UI; UI = UI->next) \
+
+/* Create a new UI. */
+extern struct ui *new_ui (FILE *instream, FILE *outstream, FILE *errstream);
+extern void delete_ui (struct ui *todel);
+
+/* Cleanup that deletes a UI. */
+extern struct cleanup *make_delete_ui_cleanup (struct ui *ui);
+
+/* Register the UI's input file descriptor in the event loop. */
+extern void ui_register_input_event_handler (struct ui *ui);
+
+/* Unregister the UI's input file descriptor from the event loop. */
+extern void ui_unregister_input_event_handler (struct ui *ui);
/* From top.c. */
extern char *saved_command_line;
-extern FILE *instream;
extern int in_user_command;
extern int confirm;
extern char gdb_dirbuf[1024];
extern void init_history (void);
extern void command_loop (void);
extern int quit_confirm (void);
-extern void quit_force (char *, int);
+extern void quit_force (int *, int);
extern void quit_command (char *, int);
extern void quit_cover (void);
extern void execute_command (char *, int);
by gdb for its command prompt. */
extern void set_prompt (const char *s);
-/* Return 1 if the current input handler is a secondary prompt, 0 otherwise. */
+/* Return 1 if UI's current input handler is a secondary prompt, 0
+ otherwise. */
-extern int gdb_in_secondary_prompt_p (void);
+extern int gdb_in_secondary_prompt_p (struct ui *ui);
/* From random places. */
extern int readnow_symbol_files;