ncurses-4.2-990116

1 files changed, 0 insertions, 901 deletions

diff --git a/lib/libcurses/lib_mouse.c b/lib/libcurses/lib_mouse.c
deleted file mode 100644
index 608534277d8..00000000000
--- a/lib/libcurses/lib_mouse.c
+++ /dev/null
@@ -1,901 +0,0 @@
-/*	$OpenBSD: lib_mouse.c,v 1.8 1998/10/31 06:30:30 millert Exp $	*/
-
-/****************************************************************************
- * Copyright (c) 1998 Free Software Foundation, Inc.                        *
- *                                                                          *
- * Permission is hereby granted, free of charge, to any person obtaining a  *
- * copy of this software and associated documentation files (the            *
- * "Software"), to deal in the Software without restriction, including      *
- * without limitation the rights to use, copy, modify, merge, publish,      *
- * distribute, distribute with modifications, sublicense, and/or sell       *
- * copies of the Software, and to permit persons to whom the Software is    *
- * furnished to do so, subject to the following conditions:                 *
- *                                                                          *
- * The above copyright notice and this permission notice shall be included  *
- * in all copies or substantial portions of the Software.                   *
- *                                                                          *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
- * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
- * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
- *                                                                          *
- * Except as contained in this notice, the name(s) of the above copyright   *
- * holders shall not be used in advertising or otherwise to promote the     *
- * sale, use or other dealings in this Software without prior written       *
- * authorization.                                                           *
- ****************************************************************************/
-
-/****************************************************************************
- *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
- *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
- ****************************************************************************/
-
-/*
- * This module is intended to encapsulate ncurses's interface to pointing
- * devices.
- *
- * The first method used is xterm's internal mouse-tracking facility.
- * The second (not yet implemented) will be Alessandro Rubini's GPM server.
- *
- * Notes for implementors of new mouse-interface methods:
- *
- * The code is logically split into a lower level that accepts event reports
- * in a device-dependent format and an upper level that parses mouse gestures
- * and filters events.  The mediating data structure is a circular queue of
- * MEVENT structures.
- *
- * Functionally, the lower level's job is to pick up primitive events and
- * put them on the circular queue.  This can happen in one of two ways:
- * either (a) _nc_mouse_event() detects a series of incoming mouse reports
- * and queues them, or (b) code in lib_getch.c detects the kmous prefix in
- * the keyboard input stream and calls _nc_mouse_inline to queue up a series
- * of adjacent mouse reports.
- *
- * In either case, _nc_mouse_parse() should be called after the series is
- * accepted to parse the digested mouse reports (low-level MEVENTs) into
- * a gesture (a high-level or composite MEVENT).
- *
- * Don't be too shy about adding new event types or modifiers, if you can find
- * room for them in the 32-bit mask.  The API is written so that users get
- * feedback on which theoretical event types they won't see when they call
- * mousemask. There's one bit per button (the RESERVED_EVENT bit) not being
- * used yet, and a couple of bits open at the high end.
- */
-
-#ifdef __EMX__
-#  include "io.h"
-#  include "fcntl.h"
-#  define  INCL_DOS
-#  define  INCL_VIO
-#  define  INCL_KBD
-#  define  INCL_MOU
-#  define  INCL_DOSPROCESS
-#  include <os2.h>			/* Need to include before the others */
-#endif
-
-#include <curses.priv.h>
-#include <term.h>
-
-#if USE_GPM_SUPPORT
-#ifndef LINT		/* don't need this for llib-lncurses */
-#undef buttons		/* term.h defines this, and gpm uses it! */
-#include <gpm.h>
-#endif
-#endif
-
-MODULE_ID("$From: lib_mouse.c,v 1.38 1998/10/03 19:08:33 tom Exp $")
-
-#define MY_TRACE TRACE_ICALLS|TRACE_IEVENT
-
-#define INVALID_EVENT	-1
-
-static int		mousetype;
-#define M_XTERM		-1	/* use xterm's mouse tracking? */
-#define M_NONE		0	/* no mouse device */
-#define M_GPM		1	/* use GPM */
-#define M_QNX		2	/* QNX mouse on console */
-#define M_QNX_TERM	3	/* QNX mouse on pterm/xterm (using qansi-m) */
-
-#if USE_GPM_SUPPORT
-#ifndef LINT
-static Gpm_Connect gpm_connect;
-#endif
-#endif
-
-static mmask_t	eventmask;		/* current event mask */
-
-static bool _nc_mouse_parse(int);
-static void _nc_mouse_resume(SCREEN *);
-static void _nc_mouse_wrap(SCREEN *);
-
-/* maintain a circular list of mouse events */
-
-/* The definition of the circular list size (EV_MAX), is in curses.priv.h, so
- * wgetch() may refer to the size and call _nc_mouse_parse() before circular
- * list overflow.
- */
-static MEVENT	events[EV_MAX];		/* hold the last mouse event seen */
-static MEVENT	*eventp = events;	/* next free slot in event queue */
-#define NEXT(ep)	((ep == events + EV_MAX - 1) ? events : ep + 1)
-#define PREV(ep)	((ep == events) ? events + EV_MAX - 1 : ep - 1)
-
-#ifdef TRACE
-static void _trace_slot(const char *tag)
-{
-	MEVENT *ep;
-
-	_tracef(tag);
-
-	for (ep = events; ep < events + EV_MAX; ep++)
-		_tracef("mouse event queue slot %ld = %s",
-			(long) (ep - events),
-			_tracemouse(ep));
-}
-#endif
-
-#ifdef USE_EMX_MOUSE
-
-#  define TOP_ROW          0
-#  define LEFT_COL         0
-
-static int mouse_wfd;
-static int mouse_thread;
-
-#  define M_FD(sp) sp->_mouse_fd
-
-static void
-write_event(int down, int button, int x, int y)
-{
-    char buf[6];
-    unsigned long ignore;
-
-    strcpy(buf, key_mouse);
-    buf[3] = ' ' + (button - 1) + (down ? 0 : 0x40);
-    buf[4] = ' ' + x - LEFT_COL + 1;
-    buf[5] = ' ' + y - TOP_ROW + 1;
-    DosWrite(mouse_wfd, buf, 6, &ignore);
-}
-
-static void
-mouse_server(unsigned long ignored GCC_UNUSED)
-{
-    unsigned short fWait = MOU_WAIT;
-    /* NOPTRRECT mourt = { 0,0,24,79 }; */
-    MOUEVENTINFO mouev;
-    HMOU hmou;
-    unsigned short mask = MOUSE_BN1_DOWN | MOUSE_BN2_DOWN | MOUSE_BN3_DOWN;
-    int oldstate = 0;
-    char errmess[] = "Unexpected termination of mouse thread\r\n";
-    unsigned long ignore;
-
-    /* open the handle for the mouse */
-    if (MouOpen(NULL,&hmou) == 0) {
-
-	if (MouSetEventMask(&mask,hmou) == 0
-	 && MouDrawPtr(hmou) == 0) {
-
-	    for (;;) {
-		/* sit and wait on the event queue */
-		if (MouReadEventQue(&mouev,&fWait,hmou))
-			break;
-
-		/*
-		 * OS/2 numbers a 3-button mouse inconsistently from other
-		 * platforms:
-		 *	1 = left
-		 *	2 = right
-		 *	3 = middle.
-		 */
-		if ((mouev.fs ^ oldstate) & MOUSE_BN1_DOWN)
-		    write_event(mouev.fs  & MOUSE_BN1_DOWN, 1, mouev.col, mouev.row);
-		if ((mouev.fs ^ oldstate) & MOUSE_BN2_DOWN)
-		    write_event(mouev.fs  & MOUSE_BN2_DOWN, 2, mouev.col, mouev.row);
-		if ((mouev.fs ^ oldstate) & MOUSE_BN3_DOWN)
-		    write_event(mouev.fs  & MOUSE_BN3_DOWN, 3, mouev.col, mouev.row);
-
-		oldstate = mouev.fs;
-	    }
-	}
-
-	DosWrite(2, errmess, strlen(errmess), &ignore);
-	MouClose(hmou);
-    }
-    DosExit(EXIT_THREAD, 0L );
-}
-#endif
-
-/* FIXME: The list of names should be configurable */
-static int is_xterm(const char *name)
-{
-    return (!strncmp(name, "xterm", 5)
-      ||    !strncmp(name, "rxvt",  4)
-      ||    !strncmp(name, "kterm", 5)
-      ||    !strncmp(name, "color_xterm", 11));
-}
-
-static void _nc_mouse_init(void)
-/* initialize the mouse */
-{
-    int i;
-    static int initialized;
-
-    if (initialized) {
-	return;
-    }
-    initialized = TRUE;
-
-    TR(MY_TRACE, ("_nc_mouse_init() called"));
-
-    for (i = 0; i < EV_MAX; i++)
-	events[i].id = INVALID_EVENT;
-
-    /* we know how to recognize mouse events under xterm */
-    if (key_mouse != 0
-     && is_xterm(cur_term->type.term_names))
-	mousetype = M_XTERM;
-
-#if USE_GPM_SUPPORT
-    else if (!strncmp(cur_term->type.term_names, "linux", 5))
-    {
-	/* GPM: initialize connection to gpm server */
-	gpm_connect.eventMask = GPM_DOWN|GPM_UP;
-	gpm_connect.defaultMask = ~gpm_connect.eventMask;
-	gpm_connect.minMod = 0;
-	gpm_connect.maxMod = ~0;
-	if (Gpm_Open (&gpm_connect, 0) >= 0) { /* returns the file-descriptor */
-	    mousetype = M_GPM;
-	    SP->_mouse_fd = gpm_fd;
-	}
-    }
-#endif
-
-    /* OS/2 VIO */
-#ifdef USE_EMX_MOUSE
-    if (!mouse_thread && mousetype != M_XTERM && key_mouse) {
-	int handles[2];
-	if (pipe(handles) < 0) {
-	    perror("mouse pipe error");
-	} else {
-	    int rc;
-
-	    mouse_wfd = handles[1];
-	    M_FD(SP) = handles[0];
-	    /* Needed? */
-	    setmode(handles[0], O_BINARY);
-	    setmode(handles[1], O_BINARY);
-	    /* Do not use CRT functions, we may single-threaded. */
-	    rc = DosCreateThread((unsigned long*)&mouse_thread, mouse_server, 0, 0, 8192);
-	    if (rc)
-		printf("mouse thread error %d=%#x", rc, rc);
-	    else
-		mousetype = M_XTERM;
-	}
-    }
-#endif
-
-    T(("_nc_mouse_init() set mousetype to %d", mousetype));
-}
-
-static bool _nc_mouse_event(SCREEN *sp GCC_UNUSED)
-/* query to see if there is a pending mouse event */
-{
-#if USE_GPM_SUPPORT
-    /* GPM: query server for event, return TRUE if we find one */
-    Gpm_Event ev;
-
-    if (gpm_fd >= 0
-     && _nc_timed_wait(2, 0, (int *)0)
-     && Gpm_GetEvent(&ev) == 1)
-    {
-	eventp->id = 0;		/* there's only one mouse... */
-
-	eventp->bstate = 0;
-	switch (ev.type & 0x0f)
-	{
-	case(GPM_DOWN):
-	    if (ev.buttons & GPM_B_LEFT)   eventp->bstate |= BUTTON1_PRESSED;
-	    if (ev.buttons & GPM_B_MIDDLE) eventp->bstate |= BUTTON2_PRESSED;
-	    if (ev.buttons & GPM_B_RIGHT)  eventp->bstate |= BUTTON3_PRESSED;
-	    break;
-	case(GPM_UP):
-	    if (ev.buttons & GPM_B_LEFT)   eventp->bstate |= BUTTON1_RELEASED;
-	    if (ev.buttons & GPM_B_MIDDLE) eventp->bstate |= BUTTON2_RELEASED;
-	    if (ev.buttons & GPM_B_RIGHT)  eventp->bstate |= BUTTON3_RELEASED;
-	    break;
-	default:
-	    break;
-	}
-
-	eventp->x = ev.x - 1;
-	eventp->y = ev.y - 1;
-	eventp->z = 0;
-
-	/* bump the next-free pointer into the circular list */
-	eventp = NEXT(eventp);
-	return (TRUE);
-    }
-#endif
-
-    /* xterm: never have to query, mouse events are in the keyboard stream */
-    return(FALSE);	/* no event waiting */
-}
-
-static bool _nc_mouse_inline(SCREEN *sp)
-/* mouse report received in the keyboard stream -- parse its info */
-{
-    TR(MY_TRACE, ("_nc_mouse_inline() called"));
-
-    if (mousetype == M_XTERM)
-    {
-	unsigned char	kbuf[4];
-	MEVENT	*prev;
-	size_t	grabbed;
-	int	res;
-
-	/* This code requires that your xterm entry contain the kmous
-	 * capability and that it be set to the \E[M documented in the
-	 * Xterm Control Sequences reference.  This is how we
-	 * arrange for mouse events to be reported via a KEY_MOUSE
-	 * return value from wgetch().  After this value is received,
-	 * _nc_mouse_inline() gets called and is immediately
-	 * responsible for parsing the mouse status information
-	 * following the prefix.
-	 *
-	 * The following quotes from the ctrlseqs.ms document in the
-	 * X distribution, describing the X mouse tracking feature:
-	 *
-	 * Parameters for all mouse tracking escape sequences
-	 * generated by xterm encode numeric parameters in a single
-	 * character as value+040.  For example, !  is 1.
-	 *
-	 * On button press or release, xterm sends ESC [ M CbCxCy.
-	 * The low two bits of Cb encode button information: 0=MB1
-	 * pressed, 1=MB2 pressed, 2=MB3 pressed, 3=release.  The
-	 * upper bits encode what modifiers were down when the
-	 * button was pressed and are added together.  4=Shift,
-	 * 8=Meta, 16=Control.  Cx and Cy are the x and y coordinates
-	 * of the mouse event.  The upper left corner is (1,1).
-	 *
-	 * (End quote)  By the time we get here, we've eaten the
-	 * key prefix.  FYI, the loop below is necessary because
-	 * mouse click info isn't guaranteed to present as a
-	 * single clist item.  It always does under Linux but often
-	 * fails to under Solaris.
-	 */
-	for (grabbed = 0; grabbed < 3; grabbed += res)
-	{
-
-	/* For VIO mouse we add extra bit 64 to disambiguate button-up. */
-#ifdef USE_EMX_MOUSE
-	     res = read( M_FD(sp) >= 0 ? M_FD(sp) : sp->_ifd, &kbuf, 3);
-#else
-	     res = read(sp->_ifd, kbuf + grabbed, 3-grabbed);
-#endif
-	     if (res == -1)
-		 break;
-	}
-	kbuf[3] = '\0';
-
-	TR(TRACE_IEVENT, ("_nc_mouse_inline sees the following xterm data: '%s'", kbuf));
-
-	eventp->id = 0;		/* there's only one mouse... */
-
-	/* processing code goes here */
-	eventp->bstate = 0;
-	switch (kbuf[0] & 0x3)
-	{
-	case 0x0:
-	    eventp->bstate = BUTTON1_PRESSED;
-#ifdef USE_EMX_MOUSE
-	    if (kbuf[0] & 0x40)
-		eventp->bstate = BUTTON1_RELEASED;
-#endif
-	    break;
-
-	case 0x1:
-	    eventp->bstate = BUTTON2_PRESSED;
-#ifdef USE_EMX_MOUSE
-	    if (kbuf[0] & 0x40)
-		eventp->bstate = BUTTON2_RELEASED;
-#endif
-	    break;
-
-	case 0x2:
-	    eventp->bstate = BUTTON3_PRESSED;
-#ifdef USE_EMX_MOUSE
-	    if (kbuf[0] & 0x40)
-		eventp->bstate = BUTTON3_RELEASED;
-#endif
-	    break;
-
-	case 0x3:
-	    /*
-	     * Release events aren't reported for individual buttons,
-	     * just for the button set as a whole...
-	     */
-	    eventp->bstate =
-		(BUTTON1_RELEASED |
-		 BUTTON2_RELEASED |
-		 BUTTON3_RELEASED);
-	    /*
-	     * ...however, because there are no kinds of mouse events under
-	     * xterm that can intervene between press and release, we can
-	     * deduce which buttons were actually released by looking at the
-	     * previous event.
-	     */
-	    prev = PREV(eventp);
-	    if (!(prev->bstate & BUTTON1_PRESSED))
-		eventp->bstate &=~ BUTTON1_RELEASED;
-	    if (!(prev->bstate & BUTTON2_PRESSED))
-		eventp->bstate &=~ BUTTON2_RELEASED;
-	    if (!(prev->bstate & BUTTON3_PRESSED))
-		eventp->bstate &=~ BUTTON3_RELEASED;
-	    break;
-	}
-
-	if (kbuf[0] & 4) {
-	    eventp->bstate |= BUTTON_SHIFT;
-	}
-	if (kbuf[0] & 8) {
-	    eventp->bstate |= BUTTON_ALT;
-	}
-	if (kbuf[0] & 16) {
-	    eventp->bstate |= BUTTON_CTRL;
-	}
-
-	eventp->x = (kbuf[1] - ' ') - 1;
-	eventp->y = (kbuf[2] - ' ') - 1;
-	TR(MY_TRACE, ("_nc_mouse_inline: primitive mouse-event %s has slot %ld",
-		_tracemouse(eventp),
-		(long) (eventp - events)));
-
-	/* bump the next-free pointer into the circular list */
-	eventp = NEXT(eventp);
-#if 0	/* this return would be needed for QNX's mods to lib_getch.c */
-	return(TRUE);
-#endif
-    }
-
-    return(FALSE);
-}
-
-static void mouse_activate(bool on)
-{
-    _nc_mouse_init();
-
-    if (on) {
-
-	switch (mousetype) {
-	case M_XTERM:
-#ifdef NCURSES_EXT_FUNCS
-	    keyok(KEY_MOUSE, on);
-#endif
-	    TPUTS_TRACE("xterm mouse initialization");
-	    putp("\033[?1000h");
-	    break;
-#if USE_GPM_SUPPORT
-	case M_GPM:
-	    SP->_mouse_fd = gpm_fd;
-	    break;
-#endif
-	}
-	/* Make runtime binding to cut down on object size of applications that
-	 * do not use the mouse (e.g., 'clear').
-	 */
-	SP->_mouse_event  = _nc_mouse_event;
-	SP->_mouse_inline = _nc_mouse_inline;
-	SP->_mouse_parse  = _nc_mouse_parse;
-	SP->_mouse_resume = _nc_mouse_resume;
-	SP->_mouse_wrap   = _nc_mouse_wrap;
-
-    } else {
-
-	switch (mousetype) {
-	case M_XTERM:
-	    TPUTS_TRACE("xterm mouse deinitialization");
-	    putp("\033[?1000l");
-	    break;
-#if USE_GPM_SUPPORT
-	case M_GPM:
-	    break;
-#endif
-	}
-    }
-    (void) fflush(SP->_ofp);
-}
-
-/**************************************************************************
- *
- * Device-independent code
- *
- **************************************************************************/
-
-static bool _nc_mouse_parse(int runcount)
-/* parse a run of atomic mouse events into a gesture */
-{
-    MEVENT	*ep, *runp, *next, *prev = PREV(eventp);
-    int		n;
-    bool	merge;
-
-    TR(MY_TRACE, ("_nc_mouse_parse(%d) called", runcount));
-
-    /*
-     * When we enter this routine, the event list next-free pointer
-     * points just past a run of mouse events that we know were separated
-     * in time by less than the critical click interval. The job of this
-     * routine is to collaps this run into a single higher-level event
-     * or gesture.
-     *
-     * We accomplish this in two passes.  The first pass merges press/release
-     * pairs into click events.  The second merges runs of click events into
-     * double or triple-click events.
-     *
-     * It's possible that the run may not resolve to a single event (for
-     * example, if the user quadruple-clicks).  If so, leading events
-     * in the run are ignored.
-     *
-     * Note that this routine is independent of the format of the specific
-     * format of the pointing-device's reports.  We can use it to parse
-     * gestures on anything that reports press/release events on a per-
-     * button basis, as long as the device-dependent mouse code puts stuff
-     * on the queue in MEVENT format.
-     */
-    if (runcount == 1)
-    {
-	TR(MY_TRACE, ("_nc_mouse_parse: returning simple mouse event %s at slot %ld",
-	   _tracemouse(prev),
-	   (long) (prev - events)));
-	return (prev->id >= 0)
-		? ((prev->bstate & eventmask) ? TRUE : FALSE)
-		: FALSE;
-    }
-
-    /* find the start of the run */
-    runp = eventp;
-    for (n = runcount; n > 0; n--) {
-	runp = PREV(runp);
-    }
-
-#ifdef TRACE
-    if (_nc_tracing & TRACE_IEVENT)
-    {
-	_trace_slot("before mouse press/release merge:");
-	_tracef("_nc_mouse_parse: run starts at %ld, ends at %ld, count %d",
-	    (long) (runp - events),
-	    (long) ((eventp - events) + (EV_MAX-1)) % EV_MAX,
-	    runcount);
-    }
-#endif /* TRACE */
-
-    /* first pass; merge press/release pairs */
-    do {
-	merge = FALSE;
-	for (ep = runp; next = NEXT(ep), next != eventp; ep = next)
-	{
-	    if (ep->x == next->x && ep->y == next->y
-		&& (ep->bstate & (BUTTON1_PRESSED|BUTTON2_PRESSED|BUTTON3_PRESSED))
-		&& (!(ep->bstate & BUTTON1_PRESSED)
-		    == !(next->bstate & BUTTON1_RELEASED))
-		&& (!(ep->bstate & BUTTON2_PRESSED)
-		    == !(next->bstate & BUTTON2_RELEASED))
-		&& (!(ep->bstate & BUTTON3_PRESSED)
-		    == !(next->bstate & BUTTON3_RELEASED))
-		)
-	    {
-		if ((eventmask & BUTTON1_CLICKED)
-			&& (ep->bstate & BUTTON1_PRESSED))
-		{
-		    ep->bstate &=~ BUTTON1_PRESSED;
-		    ep->bstate |= BUTTON1_CLICKED;
-		    merge = TRUE;
-		}
-		if ((eventmask & BUTTON2_CLICKED)
-			&& (ep->bstate & BUTTON2_PRESSED))
-		{
-		    ep->bstate &=~ BUTTON2_PRESSED;
-		    ep->bstate |= BUTTON2_CLICKED;
-		    merge = TRUE;
-		}
-		if ((eventmask & BUTTON3_CLICKED)
-			&& (ep->bstate & BUTTON3_PRESSED))
-		{
-		    ep->bstate &=~ BUTTON3_PRESSED;
-		    ep->bstate |= BUTTON3_CLICKED;
-		    merge = TRUE;
-		}
-		if (merge)
-		    next->id = INVALID_EVENT;
-	    }
-	}
-    } while
-	(merge);
-
-#ifdef TRACE
-    if (_nc_tracing & TRACE_IEVENT)
-    {
-	_trace_slot("before mouse click merge:");
-	_tracef("_nc_mouse_parse: run starts at %ld, ends at %ld, count %d",
-	    (long) (runp - events),
-	    (long) ((eventp - events) + (EV_MAX-1)) % EV_MAX,
-	    runcount);
-    }
-#endif /* TRACE */
-
-    /*
-     * Second pass; merge click runs.  At this point, click events are
-     * each followed by one invalid event. We merge click events
-     * forward in the queue.
-     *
-     * NOTE: There is a problem with this design!  If the application
-     * allows enough click events to pile up in the circular queue so
-     * they wrap around, it will cheerfully merge the newest forward
-     * into the oldest, creating a bogus doubleclick and confusing
-     * the queue-traversal logic rather badly.  Generally this won't
-     * happen, because calling getmouse() marks old events invalid and
-     * ineligible for merges.  The true solution to this problem would
-     * be to timestamp each MEVENT and perform the obvious sanity check,
-     * but the timer element would have to have sub-second resolution,
-     * which would get us into portability trouble.
-     */
-    do {
-	MEVENT	*follower;
-
-	merge = FALSE;
-	for (ep = runp; next = NEXT(ep), next != eventp; ep = next)
-	    if (ep->id != INVALID_EVENT)
-	    {
-		if (next->id != INVALID_EVENT)
-		    continue;
-		follower = NEXT(next);
-		if (follower->id == INVALID_EVENT)
-		    continue;
-
-		/* merge click events forward */
-		if ((ep->bstate &
-			(BUTTON1_CLICKED | BUTTON2_CLICKED | BUTTON3_CLICKED))
-		    && (follower->bstate &
-			(BUTTON1_CLICKED | BUTTON2_CLICKED | BUTTON3_CLICKED)))
-		{
-		    if ((eventmask & BUTTON1_DOUBLE_CLICKED)
-			&& (follower->bstate & BUTTON1_CLICKED))
-		    {
-			follower->bstate &=~ BUTTON1_CLICKED;
-			follower->bstate |= BUTTON1_DOUBLE_CLICKED;
-			merge = TRUE;
-		    }
-		    if ((eventmask & BUTTON2_DOUBLE_CLICKED)
-			&& (follower->bstate & BUTTON2_CLICKED))
-		    {
-			follower->bstate &=~ BUTTON2_CLICKED;
-			follower->bstate |= BUTTON2_DOUBLE_CLICKED;
-			merge = TRUE;
-		    }
-		    if ((eventmask & BUTTON3_DOUBLE_CLICKED)
-			&& (follower->bstate & BUTTON3_CLICKED))
-		    {
-			follower->bstate &=~ BUTTON3_CLICKED;
-			follower->bstate |= BUTTON3_DOUBLE_CLICKED;
-			merge = TRUE;
-		    }
-		    if (merge)
-			ep->id = INVALID_EVENT;
-		}
-
-		/* merge double-click events forward */
-		if ((ep->bstate &
-			(BUTTON1_DOUBLE_CLICKED
-			 | BUTTON2_DOUBLE_CLICKED
-			 | BUTTON3_DOUBLE_CLICKED))
-		    && (follower->bstate &
-			(BUTTON1_CLICKED | BUTTON2_CLICKED | BUTTON3_CLICKED)))
-		{
-		    if ((eventmask & BUTTON1_TRIPLE_CLICKED)
-			&& (follower->bstate & BUTTON1_CLICKED))
-		    {
-			follower->bstate &=~ BUTTON1_CLICKED;
-			follower->bstate |= BUTTON1_TRIPLE_CLICKED;
-			merge = TRUE;
-		    }
-		    if ((eventmask & BUTTON2_TRIPLE_CLICKED)
-			&& (follower->bstate & BUTTON2_CLICKED))
-		    {
-			follower->bstate &=~ BUTTON2_CLICKED;
-			follower->bstate |= BUTTON2_TRIPLE_CLICKED;
-			merge = TRUE;
-		    }
-		    if ((eventmask & BUTTON3_TRIPLE_CLICKED)
-			&& (follower->bstate & BUTTON3_CLICKED))
-		    {
-			follower->bstate &=~ BUTTON3_CLICKED;
-			follower->bstate |= BUTTON3_TRIPLE_CLICKED;
-			merge = TRUE;
-		    }
-		    if (merge)
-			ep->id = INVALID_EVENT;
-		}
-	    }
-    } while
-	(merge);
-
-#ifdef TRACE
-    if (_nc_tracing & TRACE_IEVENT)
-    {
-	_trace_slot("before mouse event queue compaction:");
-	_tracef("_nc_mouse_parse: run starts at %ld, ends at %ld, count %d",
-	    (long) (runp - events),
-	    (long) ((eventp - events) + (EV_MAX-1)) % EV_MAX,
-	    runcount);
-    }
-#endif /* TRACE */
-
-    /*
-     * Now try to throw away trailing events flagged invalid, or that
-     * don't match the current event mask.
-     */
-    for (; runcount; prev = PREV(eventp), runcount--)
-	if (prev->id == INVALID_EVENT || !(prev->bstate & eventmask)) {
-	    eventp = prev;
-	}
-
-#ifdef TRACE
-    if (_nc_tracing & TRACE_IEVENT)
-    {
-	_trace_slot("after mouse event queue compaction:");
-	_tracef("_nc_mouse_parse: run starts at %ld, ends at %ld, count %d",
-	    (long) (runp - events),
-	    (long) ((eventp - events) + (EV_MAX-1)) % EV_MAX,
-	    runcount);
-    }
-    for (ep = runp; ep != eventp; ep = NEXT(ep))
-	if (ep->id != INVALID_EVENT)
-	    TR(MY_TRACE, ("_nc_mouse_parse: returning composite mouse event %s at slot %ld",
-		_tracemouse(ep),
-		(long) (ep - events)));
-#endif /* TRACE */
-
-    /* after all this, do we have a valid event? */
-    return(PREV(eventp)->id != INVALID_EVENT);
-}
-
-static void _nc_mouse_wrap(SCREEN *sp GCC_UNUSED)
-/* release mouse -- called by endwin() before shellout/exit */
-{
-    TR(MY_TRACE, ("_nc_mouse_wrap() called"));
-
-    switch (mousetype) {
-    case M_XTERM:
-        if (eventmask)
-            mouse_activate(FALSE);
-        break;
-#if USE_GPM_SUPPORT
-	/* GPM: pass all mouse events to next client */
-	case M_GPM:
-	    break;
-#endif
-    }
-}
-
-static void _nc_mouse_resume(SCREEN *sp GCC_UNUSED)
-/* re-connect to mouse -- called by doupdate() after shellout */
-{
-    TR(MY_TRACE, ("_nc_mouse_resume() called"));
-
-    /* xterm: re-enable reporting */
-    if (mousetype == M_XTERM && eventmask)
-	mouse_activate(TRUE);
-
-    /* GPM: reclaim our event set */
-}
-
-/**************************************************************************
- *
- * Mouse interface entry points for the API
- *
- **************************************************************************/
-
-int getmouse(MEVENT *aevent)
-/* grab a copy of the current mouse event */
-{
-    T((T_CALLED("getmouse(%p)"), aevent));
-
-    if (aevent && (mousetype != M_NONE))
-    {
-	/* compute the current-event pointer */
-	MEVENT	*prev = PREV(eventp);
-
-	/* copy the event we find there */
-	*aevent = *prev;
-
-	TR(TRACE_IEVENT, ("getmouse: returning event %s from slot %ld",
-	    _tracemouse(prev),
-	    (long) (prev - events)));
-
-	prev->id = INVALID_EVENT;	/* so the queue slot becomes free */
-	returnCode(OK);
-    }
-    returnCode(ERR);
-}
-
-int ungetmouse(MEVENT *aevent)
-/* enqueue a synthesized mouse event to be seen by the next wgetch() */
-{
-    /* stick the given event in the next-free slot */
-    *eventp = *aevent;
-
-    /* bump the next-free pointer into the circular list */
-    eventp = NEXT(eventp);
-
-    /* push back the notification event on the keyboard queue */
-    return ungetch(KEY_MOUSE);
-}
-
-mmask_t mousemask(mmask_t newmask, mmask_t *oldmask)
-/* set the mouse event mask */
-{
-    mmask_t result = 0;
-
-    T((T_CALLED("mousemask(%#lx,%p)"), newmask, oldmask));
-
-    if (oldmask)
-	*oldmask = eventmask;
-
-    _nc_mouse_init();
-    if ( mousetype != M_NONE )
-    {
-	eventmask = newmask &
-	    (BUTTON_ALT | BUTTON_CTRL | BUTTON_SHIFT
-	     | BUTTON1_PRESSED | BUTTON1_RELEASED | BUTTON1_CLICKED
-	     | BUTTON1_DOUBLE_CLICKED | BUTTON1_TRIPLE_CLICKED
-	     | BUTTON2_PRESSED | BUTTON2_RELEASED | BUTTON2_CLICKED
-	     | BUTTON2_DOUBLE_CLICKED | BUTTON2_TRIPLE_CLICKED
-	     | BUTTON3_PRESSED | BUTTON3_RELEASED | BUTTON3_CLICKED
-	     | BUTTON3_DOUBLE_CLICKED | BUTTON3_TRIPLE_CLICKED);
-
-	mouse_activate(eventmask != 0);
-
-	result = eventmask;
-    }
-
-    returnCode(result);
-}
-
-bool wenclose(const WINDOW *win, int y, int x)
-/* check to see if given window encloses given screen location */
-{
-    if (win)
-    {
-	y -= win->_yoffset;
-	return ((win->_begy <= y &&
-		 win->_begx <= x &&
-		 (win->_begx + win->_maxx) >= x &&
-		 (win->_begy + win->_maxy) >= y) ? TRUE : FALSE);
-    }
-    return FALSE;
-}
-
-int mouseinterval(int maxclick)
-/* set the maximum mouse interval within which to recognize a click */
-{
-    int oldval;
-
-    if (SP != 0) {
-	oldval = SP->_maxclick;
-	if (maxclick >= 0)
-	    SP->_maxclick = maxclick;
-    } else {
-	oldval = DEFAULT_MAXCLICK;
-    }
-
-    return(oldval);
-}
-
-/* This may be used by other routines to ask for the existence of mouse
-   support */
-int _nc_has_mouse(void) {
-  return (mousetype==M_NONE ? 0:1);
-}
-
-/* lib_mouse.c ends here */