X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=man%2Fcurs_scanw.3x;h=1de9ad866839a603429cae3888de26a17c9a2e9d;hp=ccbe8af32bbbb13fd1c37f17ed6dd6099c815a66;hb=a6eb34d7fec8170a8715f9e53ca2f96452dd30dd;hpb=d97989d1e0db7282c723cabb44b991b951790006

diff --git a/man/curs_scanw.3x b/man/curs_scanw.3x
index ccbe8af3..1de9ad86 100644
--- a/man/curs_scanw.3x
+++ b/man/curs_scanw.3x
@@ -1,5 +1,6 @@
 .\"***************************************************************************
-.\" Copyright (c) 1998-2018,2019 Free Software Foundation, Inc.              *
+.\" Copyright 2018-2019,2020 Thomas E. Dickey                                *
+.\" Copyright 1998-2010,2017 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            *
@@ -26,7 +27,7 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
-.\" $Id: curs_scanw.3x,v 1.25 2019/11/30 21:06:30 tom Exp $
+.\" $Id: curs_scanw.3x,v 1.28 2020/10/24 09:29:26 tom Exp $
 .TH curs_scanw 3X ""
 .ie \n(.g .ds `` \(lq
 .el       .ds `` ``
@@ -45,19 +46,19 @@
 .SH SYNOPSIS
 \fB#include <curses.h>\fR
 .sp
-\fBint scanw(const char *fmt, ...);\fR
+\fBint scanw(const char *\fP\fIfmt\fP\fB, ...);\fR
 .br
-\fBint wscanw(WINDOW *win, const char *fmt, ...);\fR
+\fBint wscanw(WINDOW *\fP\fIwin\fP\fB, const char *\fP\fIfmt\fP\fB, ...);\fR
 .br
-\fBint mvscanw(int y, int x, const char *fmt, ...);\fR
+\fBint mvscanw(int \fP\fIy\fP\fB, int \fP\fIx\fP\fB, const char *\fP\fIfmt\fP\fB, ...);\fR
 .br
-\fBint mvwscanw(WINDOW *win, int y, int x, const char *fmt, ...);\fR
-.br
-\fBint vw_scanw(WINDOW *win, const char *fmt, va_list varglist);\fR
+\fBint mvwscanw(WINDOW *\fP\fIwin\fP\fB, int \fP\fIy\fP\fB, int \fP\fIx\fP\fB, const char *\fP\fIfmt\fP\fB, ...);\fR
+.sp
+\fBint vw_scanw(WINDOW *\fP\fIwin\fP\fB, const char *\fP\fIfmt\fP\fB, va_list \fP\fIvarglist\fP\fB);\fR
 .sp
 /* obsolete */
 .br
-\fBint vwscanw(WINDOW *win, const char *fmt, va_list varglist);\fR
+\fBint vwscanw(WINDOW *\fP\fIwin\fP\fB, const char *\fP\fIfmt\fP\fB, va_list \fP\fIvarglist\fP\fB);\fR
 .SH DESCRIPTION
 The \fBscanw\fR, \fBwscanw\fR and \fBmvscanw\fR routines are analogous to
 \fBscanf\fR [see \fBscanf\fR(3)].
@@ -82,6 +83,44 @@ which were mapped in the call.
 Functions with a \*(``mv\*('' prefix first perform a cursor movement using
 \fBwmove\fP, and return an error if the position is outside the window,
 or if the window pointer is null.
+.SH HISTORY
+While \fBscanw\fP was implemented in 4BSD,
+none of the BSD releases used it until 4.4BSD (in a game).
+That early version of curses was before the ANSI C standard.
+It did not use <varargs.h>, though that was available.
+In 1991 (a couple of years after SVr4 was generally available,
+and after the C standard was published),
+other developers updated the library,
+using <stdarg.h> internally in 4.4BSD curses.
+Even with this improvement,
+BSD curses did not use function prototypes (or even declare
+functions) in the <curses.h> header until 1992.
+.PP
+SVr2 documented
+\fBscanw\fP,
+\fBwscanw\fP
+tersely as \*(``scanf through \fIstdscr\fP\*('' and
+tersely as \*(``scanf through \fIwin\fP\*('', respectively.
+.PP
+SVr3 added
+\fBmvscanw\fP, and
+\fBmvwscanw\fP, with a three-line summary saying that they were analogous
+to \fBscanf\fP(3),
+explaining that the string which would be output from \fBscanf\fP(3) would
+instead be output using \fBwaddstr\fP on the given window.
+SVr3 also added \fBvwscanw\fP, saying that the third parameter
+is a \fBva_list\fP, defined in <varargs.h>,
+and referring the reader to the manual pages for \fIvarargs\fP and
+\fIvprintf\fP for detailed descriptions.
+(Because the SVr3 documentation does not mention \fIvscanf\fP,
+that reference to \fIvprintf\fP may not be an error).
+.PP
+SVr4 added no new variations of \fBscanw\fP,
+but provided for using <varargs.h> or <stdarg.h> to define the \fBva_list\fP
+type.
+.PP
+X/Open Curses added \fBvw_scanw\fP to replace \fBvwscanw\fP,
+stating that its \fBva_list\fP definition requires <stdarg.h>.
 .SH PORTABILITY
 In this implementation, \fBvw_scanw\fP and \fBvwscanw\fP are equivalent,
 to support legacy applications.