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[src/trunk]: src Implement POSIX Curses typeahead function.
details: https://anonhg.NetBSD.org/src/rev/21f2a09986df
branches: trunk
changeset: 820143:21f2a09986df
user: roy <roy%NetBSD.org@localhost>
date: Sat Dec 31 22:47:01 2016 +0000
description:
Implement POSIX Curses typeahead function.
diffstat:
distrib/sets/lists/comp/mi | 5 ++++-
lib/libcurses/Makefile | 5 +++--
lib/libcurses/curses.h | 3 ++-
lib/libcurses/curses_private.h | 3 ++-
lib/libcurses/curses_tty.3 | 34 ++++++++++++++++++++++++++++++++--
lib/libcurses/refresh.c | 16 ++++++++++++++--
lib/libcurses/screen.c | 5 +++--
lib/libcurses/tty.c | 12 ++++++++++--
8 files changed, 70 insertions(+), 13 deletions(-)
diffs (258 lines):
diff -r e89719ef53b0 -r 21f2a09986df distrib/sets/lists/comp/mi
--- a/distrib/sets/lists/comp/mi Sat Dec 31 22:46:46 2016 +0000
+++ b/distrib/sets/lists/comp/mi Sat Dec 31 22:47:01 2016 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.2086 2016/12/31 17:46:35 roy Exp $
+# $NetBSD: mi,v 1.2087 2016/12/31 22:47:01 roy Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
./etc/mtree/set.comp comp-sys-root
@@ -9467,6 +9467,7 @@
./usr/share/man/cat3/ttyslot.0 comp-c-catman .cat
./usr/share/man/cat3/ttyunlock.0 comp-c-catman .cat
./usr/share/man/cat3/twalk.0 comp-c-catman .cat
+./usr/share/man/cat3/typeahead.0 comp-c-catman .cat
./usr/share/man/cat3/typeof.0 comp-c-catman .cat
./usr/share/man/cat3/types.0 comp-c-catman .cat
./usr/share/man/cat3/tzalloc.0 comp-c-catman .cat
@@ -16736,6 +16737,7 @@
./usr/share/man/html3/ttyslot.html comp-c-htmlman html
./usr/share/man/html3/ttyunlock.html comp-c-htmlman html
./usr/share/man/html3/twalk.html comp-c-htmlman html
+./usr/share/man/html3/typeahead.html comp-c-htmlman html
./usr/share/man/html3/typeof.html comp-c-htmlman html
./usr/share/man/html3/types.html comp-c-htmlman html
./usr/share/man/html3/tzalloc.html comp-c-htmlman html
@@ -24068,6 +24070,7 @@
./usr/share/man/man3/ttyslot.3 comp-c-man .man
./usr/share/man/man3/ttyunlock.3 comp-c-man .man
./usr/share/man/man3/twalk.3 comp-c-man .man
+./usr/share/man/man3/typeahead.3 comp-c-man .man
./usr/share/man/man3/typeof.3 comp-c-man .man
./usr/share/man/man3/types.3 comp-c-man .man
./usr/share/man/man3/tzalloc.3 comp-c-man .man
diff -r e89719ef53b0 -r 21f2a09986df lib/libcurses/Makefile
--- a/lib/libcurses/Makefile Sat Dec 31 22:46:46 2016 +0000
+++ b/lib/libcurses/Makefile Sat Dec 31 22:47:01 2016 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.74 2016/12/31 17:46:35 roy Exp $
+# $NetBSD: Makefile,v 1.75 2016/12/31 22:47:01 roy Exp $
# @(#)Makefile 8.2 (Berkeley) 1/2/94
.include <bsd.own.mk>
@@ -149,7 +149,8 @@
curses_color.3 start_color.3 curses_pad.3 subpad.3 \
curses_window.3 subwin.3 curses_input.3 timeout.3 \
curses_touch.3 touchline.3 curses_touch.3 touchoverlap.3 \
- curses_touch.3 touchwin.3 curses_print.3 unctrl.3 \
+ curses_touch.3 touchwin.3 curses_tty.3 typeahead.3 \
+ curses_print.3 unctrl.3 \
curses_underscore.3 underend.3 curses_underscore.3 underscore.3 \
curses_input.3 ungetch.3 curses_touch.3 untouchwin.3 \
curses_default_colors.3 use_default_colors.3 \
diff -r e89719ef53b0 -r 21f2a09986df lib/libcurses/curses.h
--- a/lib/libcurses/curses.h Sat Dec 31 22:46:46 2016 +0000
+++ b/lib/libcurses/curses.h Sat Dec 31 22:47:01 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: curses.h,v 1.110 2016/12/31 17:46:35 roy Exp $ */
+/* $NetBSD: curses.h,v 1.111 2016/12/31 22:47:01 roy Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
@@ -750,6 +750,7 @@
int touchline(WINDOW *, int, int);
int touchoverlap(WINDOW *, WINDOW *);
int touchwin(WINDOW *);
+int typeahead(int);
int ungetch(int);
int untouchwin(WINDOW *);
int use_default_colors(void);
diff -r e89719ef53b0 -r 21f2a09986df lib/libcurses/curses_private.h
--- a/lib/libcurses/curses_private.h Sat Dec 31 22:46:46 2016 +0000
+++ b/lib/libcurses/curses_private.h Sat Dec 31 22:47:01 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: curses_private.h,v 1.52 2016/12/30 22:38:38 roy Exp $ */
+/* $NetBSD: curses_private.h,v 1.53 2016/12/31 22:47:01 roy Exp $ */
/*-
* Copyright (c) 1998-2000 Brett Lymn
@@ -253,6 +253,7 @@
wchar_t *unget_list;
int unget_len, unget_pos;
int filtered;
+ int checkfd;
#ifdef HAVE_WCHAR
#define MB_LEN_MAX 8
#define MAX_CBUF_SIZE MB_LEN_MAX
diff -r e89719ef53b0 -r 21f2a09986df lib/libcurses/curses_tty.3
--- a/lib/libcurses/curses_tty.3 Sat Dec 31 22:46:46 2016 +0000
+++ b/lib/libcurses/curses_tty.3 Sat Dec 31 22:47:01 2016 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: curses_tty.3,v 1.9 2016/12/29 23:50:59 wiz Exp $
+.\" $NetBSD: curses_tty.3,v 1.10 2016/12/31 22:47:01 roy Exp $
.\"
.\" Copyright (c) 2002
.\" Brett Lymn (blymn%NetBSD.org@localhost, brett_lymn%yahoo.com.au@localhost)
@@ -30,7 +30,7 @@
.\" SUCH DAMAGE.
.\"
.\"
-.Dd December 29, 2016
+.Dd December 31, 2016
.Dt CURSES_TTY 3
.Os
.Sh NAME
@@ -65,6 +65,7 @@
.Nm nocbreak ,
.Nm raw ,
.Nm noraw ,
+.Nm typeahead ,
.Nm savetty ,
.Nm resetty
.Nd curses terminal manipulation routines
@@ -133,6 +134,8 @@
.Ft int
.Fn noraw "void"
.Ft int
+.Fn typeahead "int filedes"
+.Ft int
.Fn savetty "void"
.Ft int
.Fn resetty "void"
@@ -318,6 +321,33 @@
function puts the terminal into Raw mode, no input character
translation is done nor is signal character processing.
.Pp
+The
+.Fn typeahead
+function controls the detection of typeahead during a refresh based on the
+value of
+.Va filedes :
+.Bl -bullet -compact
+.It
+If
+.Ar filedes
+is a valid file descriptor, typeahead is enabled during refresh;
+Curses periodically checks
+.Ar filedes
+for input and aborts the refresh if any character is available.
+(This is the initial setting and the typeahead file descriptor corresponds
+to the input file associated with the screen created by
+.Fn initscr
+or
+.Fn newterm .
+The value of
+.Ar filedes
+need not be the file descriptor on which the refresh is occurring.
+.It
+If
+.Ar filedes
+is \-1, Curses does not check for typeahead during refresh.
+.El
+.Pp
The terminal
tty flags can be saved by calling
.Fn savetty
diff -r e89719ef53b0 -r 21f2a09986df lib/libcurses/refresh.c
--- a/lib/libcurses/refresh.c Sat Dec 31 22:46:46 2016 +0000
+++ b/lib/libcurses/refresh.c Sat Dec 31 22:47:01 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: refresh.c,v 1.80 2016/01/10 08:11:06 jdc Exp $ */
+/* $NetBSD: refresh.c,v 1.81 2016/12/31 22:47:01 roy Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
@@ -34,10 +34,11 @@
#if 0
static char sccsid[] = "@(#)refresh.c 8.7 (Berkeley) 8/13/94";
#else
-__RCSID("$NetBSD: refresh.c,v 1.80 2016/01/10 08:11:06 jdc Exp $");
+__RCSID("$NetBSD: refresh.c,v 1.81 2016/12/31 22:47:01 roy Exp $");
#endif
#endif /* not lint */
+#include <poll.h>
#include <stdlib.h>
#include <string.h>
@@ -586,6 +587,16 @@
quickch();
}
+ if (_cursesi_screen->checkfd != -1) {
+ struct pollfd fds[1];
+
+ /* If we have input, abort the update. */
+ fds[0].fd = _cursesi_screen->checkfd;
+ fds[0].events = POLLIN;
+ if (poll(fds, 1, 0) > 0)
+ goto cleanup;
+ }
+
#ifdef DEBUG
{
int i, j;
@@ -716,6 +727,7 @@
}
}
+cleanup:
/* Don't leave the screen with attributes set. */
__unsetattr(0);
#ifdef DEBUG
diff -r e89719ef53b0 -r 21f2a09986df lib/libcurses/screen.c
--- a/lib/libcurses/screen.c Sat Dec 31 22:46:46 2016 +0000
+++ b/lib/libcurses/screen.c Sat Dec 31 22:47:01 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: screen.c,v 1.25 2016/12/30 22:38:38 roy Exp $ */
+/* $NetBSD: screen.c,v 1.26 2016/12/31 22:47:01 roy Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
@@ -34,7 +34,7 @@
#if 0
static char sccsid[] = "@(#)screen.c 8.2 (blymn) 11/27/2001";
#else
-__RCSID("$NetBSD: screen.c,v 1.25 2016/12/30 22:38:38 roy Exp $");
+__RCSID("$NetBSD: screen.c,v 1.26 2016/12/31 22:47:01 roy Exp $");
#endif
#endif /* not lint */
@@ -137,6 +137,7 @@
#endif
new_screen->infd = infd;
+ new_screen->checkfd = fileno(infd);
new_screen->outfd = outfd;
new_screen->echoit = new_screen->nl = 1;
new_screen->pfast = new_screen->rawmode = new_screen->noqch = 0;
diff -r e89719ef53b0 -r 21f2a09986df lib/libcurses/tty.c
--- a/lib/libcurses/tty.c Sat Dec 31 22:46:46 2016 +0000
+++ b/lib/libcurses/tty.c Sat Dec 31 22:47:01 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tty.c,v 1.44 2016/12/12 04:20:31 christos Exp $ */
+/* $NetBSD: tty.c,v 1.45 2016/12/31 22:47:01 roy Exp $ */
/*-
* Copyright (c) 1992, 1993, 1994
@@ -34,7 +34,7 @@
#if 0
static char sccsid[] = "@(#)tty.c 8.6 (Berkeley) 1/10/95";
#else
-__RCSID("$NetBSD: tty.c,v 1.44 2016/12/12 04:20:31 christos Exp $");
+__RCSID("$NetBSD: tty.c,v 1.45 2016/12/31 22:47:01 roy Exp $");
#endif
#endif /* not lint */
@@ -670,3 +670,11 @@
return OK;
#endif /* HAVE_WCHAR */
}
+
+int
+typeahead(int filedes)
+{
+
+ _cursesi_screen->checkfd = filedes;
+ return OK;
+}
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