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authorSimon Marchi <simon.marchi@efficios.com>2023-04-28 14:27:11 -0400
committerSimon Marchi <simon.marchi@efficios.com>2023-05-01 15:40:54 -0400
commit13d03262f25bfbf15e4a5f1d867cca243c7ee3ca (patch)
tree882bd6ca945e1ab7f1bc31f64b2b425b382a9271 /gdb/top.h
parent7d3b43a15bd4267b5782ca40c0bb1dec1fa3f476 (diff)
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gdb: move struct ui and related things to ui.{c,h}
I'd like to move some things so they become methods on struct ui. But first, I think that struct ui and the related things are big enough to deserve their own file, instead of being scattered through top.{c,h} and event-top.c. Change-Id: I15594269ace61fd76ef80a7b58f51ff3ab6979bc
Diffstat (limited to 'gdb/top.h')
-rw-r--r--gdb/top.h200
1 files changed, 6 insertions, 194 deletions
diff --git a/gdb/top.h b/gdb/top.h
index 5c1ccfe..47e16ca 100644
--- a/gdb/top.h
+++ b/gdb/top.h
@@ -24,203 +24,10 @@
#include "gdbsupport/next-iterator.h"
#include "value.h"
-/* 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
- with -i on the command line) and secondary interpreters (for
- interpreter-exec ...), etc. There's always one UI associated with
- stdin/stdout/stderr, but the user can create secondary UIs, for
- example, to create a separate MI channel on its own stdio
- streams. */
-
-struct ui
-{
- /* Create a new UI. */
- ui (FILE *instream, FILE *outstream, FILE *errstream);
- ~ui ();
-
- DISABLE_COPY_AND_ASSIGN (ui);
-
- /* Pointer to next in singly-linked list. */
- struct ui *next = nullptr;
-
- /* 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. */
- std::string line_buffer;
-
- /* The callback used by the event loop whenever an event is detected
- on the UI's input file descriptor. This function incrementally
- builds a buffer where it accumulates the line read up to the
- point of invocation. In the special case in which the character
- read is newline, the function invokes the INPUT_HANDLER callback
- (see below). */
- void (*call_readline) (gdb_client_data) = nullptr;
-
- /* The function to invoke when a complete line of input is ready for
- processing. */
- void (*input_handler) (gdb::unique_xmalloc_ptr<char> &&) = nullptr;
-
- /* 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 = 0;
-
- /* Each UI has its own independent set of interpreters. */
- struct ui_interp_info *interp_info = nullptr;
-
- /* True if the UI is in async mode, false if in sync mode. If in
- sync mode, a synchronous execution command (e.g, "next") does not
- return until the command is finished. If in async mode, then
- running a synchronous command returns right after resuming the
- target. Waiting for the command's completion is later done on
- the top event loop. For the main UI, this starts out disabled,
- until all the explicit command line arguments (e.g., `gdb -ex
- "start" -ex "next"') are processed. */
- int async = 0;
-
- /* The number of nested readline secondary prompts that are
- currently active. */
- int secondary_prompt_depth = 0;
-
- /* 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. This can be set to -1 to prevent this
- registration. */
- 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. */
- bool m_input_interactive_p;
-
- /* See enum prompt_state's description. */
- enum prompt_state prompt_state = PROMPT_NEEDED;
-
- /* The fields below that start with "m_" are "private". They're
- meant to be accessed through wrapper macros that make them look
- like globals. */
-
- /* The ui_file streams. */
- /* Normal results */
- struct ui_file *m_gdb_stdout;
- /* Input stream */
- struct ui_file *m_gdb_stdin;
- /* Serious error notifications */
- struct ui_file *m_gdb_stderr;
- /* Log/debug/trace messages that should bypass normal stdout/stderr
- filtering. */
- struct ui_file *m_gdb_stdlog;
-
- /* The current ui_out. */
- struct ui_out *m_current_uiout = nullptr;
-
- /* Register the UI's input file descriptor in the event loop. */
- void register_file_handler ();
-
- /* Unregister the UI's input file descriptor from the event loop. */
- void unregister_file_handler ();
-
- /* Return true if this UI's input fd is a tty. */
- bool input_interactive_p () const;
-};
-
-/* The main UI. This is the UI that is bound to stdin/stdout/stderr.
- It always exists and is created automatically when GDB starts
- up. */
-extern struct ui *main_ui;
-
-/* The current UI. */
-extern struct ui *current_ui;
-
-/* The list of all UIs. */
-extern struct ui *ui_list;
-
-/* State for SWITCH_THRU_ALL_UIS. */
-class switch_thru_all_uis
-{
-public:
-
- switch_thru_all_uis () : m_iter (ui_list), m_save_ui (&current_ui)
- {
- current_ui = ui_list;
- }
-
- DISABLE_COPY_AND_ASSIGN (switch_thru_all_uis);
-
- /* 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:
-
- /* Used to iterate through the UIs. */
- struct ui *m_iter;
-
- /* Save and restore current_ui. */
- scoped_restore_tmpl<struct ui *> m_save_ui;
-};
-
- /* Traverse through all UI, and switch the current UI to the one
- being iterated. */
-#define SWITCH_THRU_ALL_UIS() \
- for (switch_thru_all_uis stau_state; !stau_state.done (); stau_state.next ())
-
-using ui_range = next_range<ui>;
-
-/* An adapter that can be used to traverse over all UIs. */
-static inline
-ui_range all_uis ()
-{
- return ui_range (ui_list);
-}
-
/* From top.c. */
extern bool confirm;
extern int inhibit_gdbinit;
+extern auto_boolean interactive_mode;
/* Print the GDB version banner to STREAM. If INTERACTIVE is false,
then information referring to commands (e.g., "show configuration")
@@ -297,4 +104,9 @@ extern const char *handle_line_of_input (std::string &cmd_line_buffer,
extern bool check_quiet_mode ();
+/* Unbuffer STREAM. This is a wrapper around setbuf(STREAM, nullptr)
+ which applies some special rules for MS-Windows hosts. */
+
+extern void unbuffer_stream (FILE *stream);
+
#endif