src/keyboard.h

   1 /* Declarations useful when processing input.
   2    Copyright (C) 1985-1987, 1993, 2001-2013 Free Software Foundation,
   3    Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "systime.h"            /* for struct timespec, Time */
  21 #include "coding.h"             /* for ENCODE_UTF_8 and ENCODE_SYSTEM */
  22 #include "termhooks.h"
  23
  24 INLINE_HEADER_BEGIN
  25 #ifndef KEYBOARD_INLINE
  26 # define KEYBOARD_INLINE INLINE
  27 #endif
  28
  29 /* Most code should use this macro to access Lisp fields in struct kboard.  */
  30
  31 #define KVAR(kboard, field) ((kboard)->INTERNAL_FIELD (field))
  32
  33 /* Each KBOARD represents one logical input stream from which Emacs
  34    gets input.  If we are using ordinary terminals, it has one KBOARD
  35    object for each terminal device.
  36    Usually each X display screen has its own KBOARD,
  37    but when two of them are on the same X server,
  38    we assume they share a keyboard and give them one KBOARD in common.
  39
  40    Some Lisp variables are per-kboard; they are stored in the KBOARD structure
  41    and accessed indirectly via a Lisp_Misc_Kboard_Objfwd object.
  42
  43    So that definition of keyboard macros, and reading of prefix arguments,
  44    can happen in parallel on various KBOARDs at once,
  45    the state information for those activities is stored in the KBOARD.
  46
  47    Emacs has two states for reading input:
  48
  49    ** Any kboard.  Emacs can accept input from any KBOARD,
  50    and as soon as any of them provides a complete command, Emacs can run it.
  51
  52    ** Single kboard.  Then Emacs is running a command for one KBOARD
  53    and can only read input from that KBOARD.
  54
  55    All input, from all KBOARDs, goes together in a single event queue
  56    at interrupt level.  read_char sees the events sequentially,
  57    but deals with them in accord with the current input state.
  58
  59    In the any-kboard state, read_key_sequence processes input from any KBOARD
  60    immediately.  When a new event comes in from a particular KBOARD,
  61    read_key_sequence switches to that KBOARD.  As a result,
  62    as soon as a complete key arrives from some KBOARD or other,
  63    Emacs starts executing that key's binding.  It switches to the
  64    single-kboard state for the execution of that command,
  65    so that that command can get input only from its own KBOARD.
  66
  67    While in the single-kboard state, read_char can consider input only
  68    from the current KBOARD.  If events come from other KBOARDs, they
  69    are put aside for later in the KBOARDs' kbd_queue lists.
  70    The flag kbd_queue_has_data in a KBOARD is 1 if this has happened.
  71    When Emacs goes back to the any-kboard state, it looks at all the KBOARDs
  72    to find those; and it tries processing their input right away.  */
  73
  74 typedef struct kboard KBOARD;
  75 struct kboard
  76   {
  77     KBOARD *next_kboard;
  78
  79     /* If non-nil, a keymap that overrides all others but applies only to
  80        this KBOARD.  Lisp code that uses this instead of calling read-char
  81        can effectively wait for input in the any-kboard state, and hence
  82        avoid blocking out the other KBOARDs.  See universal-argument in
  83        lisp/simple.el for an example.  */
  84     Lisp_Object INTERNAL_FIELD (Voverriding_terminal_local_map);
  85
  86     /* Last command executed by the editor command loop, not counting
  87        commands that set the prefix argument.  */
  88     Lisp_Object INTERNAL_FIELD (Vlast_command);
  89
  90     /* Normally same as last-command, but never modified by other commands.  */
  91     Lisp_Object INTERNAL_FIELD (Vreal_last_command);
  92
  93     /* User-supplied table to translate input characters through.  */
  94     Lisp_Object INTERNAL_FIELD (Vkeyboard_translate_table);
  95
  96     /* Last command that may be repeated by `repeat'.  */
  97     Lisp_Object INTERNAL_FIELD (Vlast_repeatable_command);
  98
  99     /* The prefix argument for the next command, in raw form.  */
 100     Lisp_Object INTERNAL_FIELD (Vprefix_arg);
 101
 102     /* Saved prefix argument for the last command, in raw form.  */
 103     Lisp_Object INTERNAL_FIELD (Vlast_prefix_arg);
 104
 105     /* Unread events specific to this kboard.  */
 106     Lisp_Object INTERNAL_FIELD (kbd_queue);
 107
 108     /* Non-nil while a kbd macro is being defined.  */
 109     Lisp_Object INTERNAL_FIELD (defining_kbd_macro);
 110
 111     /* The start of storage for the current keyboard macro.  */
 112     Lisp_Object *kbd_macro_buffer;
 113
 114     /* Where to store the next keystroke of the macro.  */
 115     Lisp_Object *kbd_macro_ptr;
 116
 117     /* The finalized section of the macro starts at kbd_macro_buffer and
 118        ends before this.  This is not the same as kbd_macro_ptr, because
 119        we advance this to kbd_macro_ptr when a key's command is complete.
 120        This way, the keystrokes for "end-kbd-macro" are not included in the
 121        macro.  This also allows us to throw away the events added to the
 122        macro by the last command: all the events between kbd_macro_end and
 123        kbd_macro_ptr belong to the last command; see
 124        cancel-kbd-macro-events.  */
 125     Lisp_Object *kbd_macro_end;
 126
 127     /* Allocated size of kbd_macro_buffer.  */
 128     ptrdiff_t kbd_macro_bufsize;
 129
 130     /* Last anonymous kbd macro defined.  */
 131     Lisp_Object INTERNAL_FIELD (Vlast_kbd_macro);
 132
 133     /* Alist of system-specific X windows key symbols.  */
 134     Lisp_Object INTERNAL_FIELD (Vsystem_key_alist);
 135
 136     /* Cache for modify_event_symbol.  */
 137     Lisp_Object INTERNAL_FIELD (system_key_syms);
 138
 139     /* The kind of display: x, w32, ...  */
 140     Lisp_Object INTERNAL_FIELD (Vwindow_system);
 141
 142     /* Keymap mapping keys to alternative preferred forms.
 143        See the DEFVAR for more documentation.  */
 144     Lisp_Object INTERNAL_FIELD (Vlocal_function_key_map);
 145
 146     /* Keymap mapping ASCII function key sequences onto their preferred
 147        forms.  Initialized by the terminal-specific lisp files.  See the
 148        DEFVAR for more documentation.  */
 149     Lisp_Object INTERNAL_FIELD (Vinput_decode_map);
 150
 151     /* Minibufferless frames on this display use this frame's minibuffer.  */
 152     Lisp_Object INTERNAL_FIELD (Vdefault_minibuffer_frame);
 153
 154     /* Number of displays using this KBOARD.  Normally 1, but can be
 155        larger when you have multiple screens on a single X display.  */
 156     int reference_count;
 157
 158     /* The text we're echoing in the modeline - partial key sequences,
 159        usually.  This is nil when not echoing.  */
 160     Lisp_Object INTERNAL_FIELD (echo_string);
 161
 162     /* This flag indicates that events were put into kbd_queue
 163        while Emacs was running for some other KBOARD.
 164        The flag means that, when Emacs goes into the any-kboard state again,
 165        it should check this KBOARD to see if there is a complete command
 166        waiting.
 167
 168        Note that the kbd_queue field can be non-nil even when
 169        kbd_queue_has_data is 0.  When we push back an incomplete
 170        command, then this flag is 0, meaning we don't want to try
 171        reading from this KBOARD again until more input arrives.  */
 172     char kbd_queue_has_data;
 173
 174     /* True means echo each character as typed.  */
 175     unsigned immediate_echo : 1;
 176
 177     /* If we have echoed a prompt string specified by the user,
 178        this is its length in characters.  Otherwise this is -1.  */
 179     ptrdiff_t echo_after_prompt;
 180   };
 181
 182 KEYBOARD_INLINE void
 183 kset_default_minibuffer_frame (struct kboard *kb, Lisp_Object val)
 184 {
 185   kb->INTERNAL_FIELD (Vdefault_minibuffer_frame) = val;
 186 }
 187 KEYBOARD_INLINE void
 188 kset_defining_kbd_macro (struct kboard *kb, Lisp_Object val)
 189 {
 190   kb->INTERNAL_FIELD (defining_kbd_macro) = val;
 191 }
 192 KEYBOARD_INLINE void
 193 kset_input_decode_map (struct kboard *kb, Lisp_Object val)
 194 {
 195   kb->INTERNAL_FIELD (Vinput_decode_map) = val;
 196 }
 197 KEYBOARD_INLINE void
 198 kset_last_command (struct kboard *kb, Lisp_Object val)
 199 {
 200   kb->INTERNAL_FIELD (Vlast_command) = val;
 201 }
 202 KEYBOARD_INLINE void
 203 kset_last_kbd_macro (struct kboard *kb, Lisp_Object val)
 204 {
 205   kb->INTERNAL_FIELD (Vlast_kbd_macro) = val;
 206 }
 207 KEYBOARD_INLINE void
 208 kset_prefix_arg (struct kboard *kb, Lisp_Object val)
 209 {
 210   kb->INTERNAL_FIELD (Vprefix_arg) = val;
 211 }
 212 KEYBOARD_INLINE void
 213 kset_system_key_alist (struct kboard *kb, Lisp_Object val)
 214 {
 215   kb->INTERNAL_FIELD (Vsystem_key_alist) = val;
 216 }
 217 KEYBOARD_INLINE void
 218 kset_window_system (struct kboard *kb, Lisp_Object val)
 219 {
 220   kb->INTERNAL_FIELD (Vwindow_system) = val;
 221 }
 222
 223 /* Temporarily used before a frame has been opened. */
 224 extern KBOARD *initial_kboard;
 225
 226 /* In the single-kboard state, this is the kboard
 227    from which input is accepted.
 228
 229    In the any-kboard state, this is the kboard from which we are
 230    right now considering input.  We can consider input from another
 231    kboard, but doing so requires throwing to wrong_kboard_jmpbuf.  */
 232 extern KBOARD *current_kboard;
 233
 234 /* A list of all kboard objects, linked through next_kboard.  */
 235 extern KBOARD *all_kboards;
 236 \f
 237 /* Total number of times read_char has returned, modulo UINTMAX_MAX + 1.  */
 238 extern uintmax_t num_input_events;
 239
 240 /* Nonzero means polling for input is temporarily suppressed.  */
 241 extern int poll_suppress_count;
 242
 243 /* Vector holding the key sequence that invoked the current command.
 244    It is reused for each command, and it may be longer than the current
 245    sequence; this_command_key_count indicates how many elements
 246    actually mean something.  */
 247 extern Lisp_Object this_command_keys;
 248 extern ptrdiff_t this_command_key_count;
 249
 250 /* The frame in which the last input event occurred, or Qmacro if the
 251    last event came from a macro.  We use this to determine when to
 252    generate switch-frame events.  This may be cleared by functions
 253    like Fselect_frame, to make sure that a switch-frame event is
 254    generated by the next character.  */
 255 extern Lisp_Object internal_last_event_frame;
 256 \f
 257 extern Lisp_Object Qrecompute_lucid_menubar, Qactivate_menubar_hook;
 258
 259 /* This holds a Lisp vector that holds the properties of a single
 260    menu item while decoding it in parse_menu_item.
 261    Using a Lisp vector to hold this information while we decode it
 262    takes care of protecting all the data from GC.  */
 263 extern Lisp_Object item_properties;
 264
 265 /* This describes the elements of item_properties.
 266    The first element is not a property, it is a pointer to the item properties
 267    that is saved for GC protection. */
 268 #define ITEM_PROPERTY_ITEM 0
 269 /* The item string.  */
 270 #define ITEM_PROPERTY_NAME 1
 271 /* Start of initialize to nil */
 272 /* The binding: nil, a command or a keymap.  */
 273 #define ITEM_PROPERTY_DEF 2
 274 /* The keymap if the binding is a keymap, otherwise nil.  */
 275 #define ITEM_PROPERTY_MAP 3
 276 /* Nil, :radio or :toggle.  */
 277 #define ITEM_PROPERTY_TYPE 4
 278 /* Nil or a string describing an equivalent key binding.  */
 279 #define ITEM_PROPERTY_KEYEQ 5
 280 /* Not nil if a selected toggle box or radio button, otherwise nil.  */
 281 #define ITEM_PROPERTY_SELECTED 6
 282 /* Place for a help string. Not yet used.  */
 283 #define ITEM_PROPERTY_HELP 7
 284 /* Start of initialize to t */
 285 /* Last property. */
 286 /* Not nil if item is enabled.  */
 287 #define ITEM_PROPERTY_ENABLE 8
 288
 289 /* This holds a Lisp vector that holds the results of decoding
 290    the keymaps or alist-of-alists that specify a menu.
 291
 292    It describes the panes and items within the panes.
 293
 294    Each pane is described by 3 elements in the vector:
 295    t, the pane name, the pane's prefix key.
 296    Then follow the pane's items, with 5 elements per item:
 297    the item string, the enable flag, the item's value,
 298    the definition, and the equivalent keyboard key's description string.
 299
 300    In some cases, multiple levels of menus may be described.
 301    A single vector slot containing nil indicates the start of a submenu.
 302    A single vector slot containing lambda indicates the end of a submenu.
 303    The submenu follows a menu item which is the way to reach the submenu.
 304
 305    A single vector slot containing quote indicates that the
 306    following items should appear on the right of a dialog box.
 307
 308    Using a Lisp vector to hold this information while we decode it
 309    takes care of protecting all the data from GC.  */
 310 extern Lisp_Object menu_items;
 311
 312 /* If non-nil, means that the global vars defined here are already in use.
 313    Used to detect cases where we try to re-enter this non-reentrant code.  */
 314 #if defined USE_GTK || defined USE_MOTIF
 315 extern Lisp_Object menu_items_inuse;
 316 #endif
 317
 318 /* Number of slots currently allocated in menu_items.  */
 319 extern int menu_items_allocated;
 320
 321 /* This is the index in menu_items of the first empty slot.  */
 322 extern int menu_items_used;
 323
 324 /* The number of panes currently recorded in menu_items,
 325    excluding those within submenus.  */
 326 extern int menu_items_n_panes;
 327
 328 #define MENU_ITEMS_PANE_NAME 1
 329 #define MENU_ITEMS_PANE_PREFIX 2
 330 #define MENU_ITEMS_PANE_LENGTH 3
 331
 332 enum menu_item_idx
 333 {
 334   MENU_ITEMS_ITEM_NAME = 0,
 335   MENU_ITEMS_ITEM_ENABLE,
 336   MENU_ITEMS_ITEM_VALUE,
 337   MENU_ITEMS_ITEM_EQUIV_KEY,
 338   MENU_ITEMS_ITEM_DEFINITION,
 339   MENU_ITEMS_ITEM_TYPE,
 340   MENU_ITEMS_ITEM_SELECTED,
 341   MENU_ITEMS_ITEM_HELP,
 342   MENU_ITEMS_ITEM_LENGTH
 343 };
 344
 345 extern void unuse_menu_items (void);
 346
 347 /* This is how to deal with multibyte text if HAVE_MULTILINGUAL_MENU
 348    isn't defined.  The use of HAVE_MULTILINGUAL_MENU could probably be
 349    confined to an extended version of this with sections of code below
 350    using it unconditionally.  */
 351 #ifndef HAVE_NTGUI
 352 #if defined (USE_GTK) || defined (HAVE_NS)
 353 # define ENCODE_MENU_STRING(str) ENCODE_UTF_8 (str)
 354 #elif defined HAVE_X_I18N
 355 #define ENCODE_MENU_STRING(str) ENCODE_SYSTEM (str)
 356 #else
 357 #define ENCODE_MENU_STRING(str) string_make_unibyte (str)
 358 #endif /* USE_GTK  */
 359 #else /* HAVE_NTGUI */
 360 #define ENCODE_MENU_STRING(str) (str)
 361 #endif
 362
 363 #if defined (HAVE_NS) || defined (HAVE_NTGUI) || defined (USE_GTK)
 364
 365 /* Definitions copied from lwlib.h */
 366
 367 enum button_type
 368 {
 369   BUTTON_TYPE_NONE,
 370   BUTTON_TYPE_TOGGLE,
 371   BUTTON_TYPE_RADIO
 372 };
 373
 374 /* This structure is based on the one in ../lwlib/lwlib.h, with unused portions
 375    removed.  No term uses these. */
 376 typedef struct _widget_value
 377 {
 378   /* name of widget */
 379   Lisp_Object   lname;
 380   const char*   name;
 381   /* value (meaning depend on widget type) */
 382   const char*   value;
 383   /* keyboard equivalent. no implications for XtTranslations */
 384   Lisp_Object   lkey;
 385   const char*   key;
 386   /* Help string or nil if none.
 387      GC finds this string through the frame's menu_bar_vector
 388      or through menu_items.  */
 389   Lisp_Object   help;
 390   /* true if enabled */
 391   unsigned char enabled;
 392   /* true if selected */
 393   unsigned char selected;
 394   /* The type of a button.  */
 395   enum button_type button_type;
 396 #if defined (HAVE_NTGUI)
 397   /* true if menu title */
 398   unsigned char title;
 399 #endif
 400   /* Contents of the sub-widgets, also selected slot for checkbox */
 401   struct _widget_value* contents;
 402   /* data passed to callback */
 403   void  *call_data;
 404   /* next one in the list */
 405   struct _widget_value* next;
 406 #ifdef USE_GTK
 407   struct _widget_value *free_list;
 408 #endif
 409 } widget_value;
 410
 411 #endif /* HAVE_NS || HAVE_NTGUI */
 412
 413 \f
 414 /* Macros for dealing with lispy events.  */
 415
 416 /* True if EVENT has data fields describing it (i.e. a mouse click).  */
 417 #define EVENT_HAS_PARAMETERS(event) (CONSP (event))
 418
 419 /* Extract the head from an event.
 420    This works on composite and simple events.  */
 421 #define EVENT_HEAD(event) \
 422   (EVENT_HAS_PARAMETERS (event) ? XCAR (event) : (event))
 423
 424 /* Extract the starting and ending positions from a composite event.  */
 425 #define EVENT_START(event) (CAR_SAFE (CDR_SAFE (event)))
 426 #define EVENT_END(event) (CAR_SAFE (CDR_SAFE (CDR_SAFE (event))))
 427
 428 /* Extract the click count from a multi-click event.  */
 429 #define EVENT_CLICK_COUNT(event) (Fnth (make_number (2), (event)))
 430
 431 /* Extract the fields of a position.  */
 432 #define POSN_WINDOW(posn) (CAR_SAFE (posn))
 433 #define POSN_POSN(posn) (CAR_SAFE (CDR_SAFE (posn)))
 434 #define POSN_SET_POSN(posn,x) (XSETCAR (XCDR (posn), (x)))
 435 #define POSN_WINDOW_POSN(posn) (CAR_SAFE (CDR_SAFE (CDR_SAFE (posn))))
 436 #define POSN_TIMESTAMP(posn) (CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (posn)))))
 437 #define POSN_SCROLLBAR_PART(posn)       (Fnth (make_number (4), (posn)))
 438
 439 /* A cons (STRING . STRING-CHARPOS), or nil in mouse-click events.
 440    It's a cons if the click is over a string in the mode line.  */
 441
 442 #define POSN_STRING(posn) (Fnth (make_number (4), (posn)))
 443
 444 /* If POSN_STRING is nil, event refers to buffer location.  */
 445
 446 #define POSN_INBUFFER_P(posn) (NILP (POSN_STRING (posn)))
 447 #define POSN_BUFFER_POSN(posn) (Fnth (make_number (5), (posn)))
 448
 449 /* Some of the event heads.  */
 450 extern Lisp_Object Qswitch_frame;
 451
 452 /* Properties on event heads.  */
 453 extern Lisp_Object Qevent_kind;
 454
 455 /* The values of Qevent_kind properties.  */
 456 extern Lisp_Object Qmouse_click;
 457
 458 extern Lisp_Object Qhelp_echo;
 459
 460 /* Getting the kind of an event head.  */
 461 #define EVENT_HEAD_KIND(event_head) \
 462   (Fget ((event_head), Qevent_kind))
 463
 464 /* Symbols to use for non-text mouse positions.  */
 465 extern Lisp_Object Qmode_line, Qvertical_line, Qheader_line;
 466
 467 /* True while doing kbd input.  */
 468 extern bool waiting_for_input;
 469
 470 /* Address (if not 0) of struct timespec to zero out if a SIGIO interrupt
 471    happens.  */
 472 extern struct timespec *input_available_clear_time;
 473
 474 #if defined HAVE_WINDOW_SYSTEM && !defined USE_GTK && !defined HAVE_NS
 475 extern bool ignore_mouse_drag_p;
 476 #endif
 477
 478 /* The primary selection.  */
 479 extern Lisp_Object QPRIMARY;
 480
 481 extern Lisp_Object parse_modifiers (Lisp_Object);
 482 extern Lisp_Object reorder_modifiers (Lisp_Object);
 483 extern Lisp_Object read_char (int, Lisp_Object, Lisp_Object,
 484                               bool *, struct timespec *);
 485 extern int parse_solitary_modifier (Lisp_Object symbol);
 486
 487
 488 /* This is like Vthis_command, except that commands never set it.  */
 489 extern Lisp_Object real_this_command;
 490
 491 /* Non-nil disable property on a command means
 492    do not execute it; call disabled-command-function's value instead.  */
 493 extern Lisp_Object QCtoggle, QCradio;
 494
 495 /* An event header symbol HEAD may have a property named
 496    Qevent_symbol_element_mask, which is of the form (BASE MODIFIERS);
 497    BASE is the base, unmodified version of HEAD, and MODIFIERS is the
 498    mask of modifiers applied to it.  If present, this is used to help
 499    speed up parse_modifiers.  */
 500 extern Lisp_Object Qevent_symbol_element_mask;
 501
 502 /* The timestamp of the last input event we received from the X server.
 503    X Windows wants this for selection ownership.  */
 504 extern Time last_event_timestamp;
 505
 506 extern int quit_char;
 507
 508 extern unsigned int timers_run;
 509
 510 extern bool menu_separator_name_p (const char *);
 511 extern bool parse_menu_item (Lisp_Object, int);
 512
 513 extern void init_kboard (KBOARD *);
 514 extern void delete_kboard (KBOARD *);
 515 extern void not_single_kboard_state (KBOARD *);
 516 extern void push_kboard (struct kboard *);
 517 extern void push_frame_kboard (struct frame *);
 518 extern void pop_kboard (void);
 519 extern void temporarily_switch_to_single_kboard (struct frame *);
 520 extern void record_asynch_buffer_change (void);
 521 extern void input_poll_signal (int);
 522 extern void start_polling (void);
 523 extern void stop_polling (void);
 524 extern void set_poll_suppress_count (int);
 525 extern int gobble_input (void);
 526 extern bool input_polling_used (void);
 527 extern void clear_input_pending (void);
 528 extern bool requeued_events_pending_p (void);
 529 extern void bind_polling_period (int);
 530 extern int make_ctrl_char (int) ATTRIBUTE_CONST;
 531 extern void stuff_buffered_input (Lisp_Object);
 532 extern void clear_waiting_for_input (void);
 533 extern void swallow_events (bool);
 534 extern bool lucid_event_type_list_p (Lisp_Object);
 535 extern void kbd_buffer_store_event (struct input_event *);
 536 extern void kbd_buffer_store_event_hold (struct input_event *,
 537                                          struct input_event *);
 538 extern void kbd_buffer_unget_event (struct input_event *);
 539 extern void poll_for_input_1 (void);
 540 extern void show_help_echo (Lisp_Object, Lisp_Object, Lisp_Object,
 541                             Lisp_Object);
 542 extern void gen_help_event (Lisp_Object, Lisp_Object, Lisp_Object,
 543                             Lisp_Object, ptrdiff_t);
 544 extern void kbd_buffer_store_help_event (Lisp_Object, Lisp_Object);
 545 extern Lisp_Object menu_item_eval_property (Lisp_Object);
 546 extern bool kbd_buffer_events_waiting (void);
 547 extern void add_user_signal (int, const char *);
 548
 549 extern int tty_read_avail_input (struct terminal *, struct input_event *);
 550 extern struct timespec timer_check (void);
 551 extern void mark_kboards (void);
 552
 553 #ifdef HAVE_NTGUI
 554 extern const char *const lispy_function_keys[];
 555 #endif
 556
 557 INLINE_HEADER_END