.\"***************************************************************************
-.\" Copyright 2018-2020,2021 Thomas E. Dickey *
+.\" Copyright 2018-2023,2024 Thomas E. Dickey *
.\" Copyright 1998-2010,2017 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: curs_inchstr.3x,v 1.23 2021/12/25 21:41:58 tom Exp $
-.TH curs_inchstr 3X ""
-.ie \n(.g .ds `` \(lq
-.el .ds `` ``
-.ie \n(.g .ds '' \(rq
-.el .ds '' ''
+.\" $Id: curs_inchstr.3x,v 1.45 2024/04/20 21:20:07 tom Exp $
+.TH curs_inchstr 3X 2024-04-20 "ncurses @NCURSES_MAJOR@.@NCURSES_MINOR@" "Library calls"
+.ie \n(.g \{\
+.ds `` \(lq
+.ds '' \(rq
+.\}
+.el \{\
+.ie t .ds `` ``
+.el .ds `` ""
+.ie t .ds '' ''
+.el .ds '' ""
+.\}
+.
.de bP
.ie n .IP \(bu 4
.el .IP \(bu 2
..
-.na
-.hy 0
.SH NAME
-\fBinchstr\fP,
-\fBinchnstr\fP,
-\fBwinchstr\fP,
-\fBwinchnstr\fP,
-\fBmvinchstr\fP,
-\fBmvinchnstr\fP,
-\fBmvwinchstr\fP,
-\fBmvwinchnstr\fP \- get a string of characters (and attributes) from a \fBcurses\fP window
-.ad
-.hy
+\fB\%inchstr\fP,
+\fB\%inchnstr\fP,
+\fB\%winchstr\fP,
+\fB\%winchnstr\fP,
+\fB\%mvinchstr\fP,
+\fB\%mvinchnstr\fP,
+\fB\%mvwinchstr\fP,
+\fB\%mvwinchnstr\fP \-
+get a \fIcurses\fR character string from a window
.SH SYNOPSIS
-\fB#include <curses.h>\fP
-.sp
-\fBint inchstr(chtype *\fP\fIchstr\fP\fB);\fP
-.br
-\fBint inchnstr(chtype *\fP\fIchstr\fP\fB, int \fP\fIn\fP\fB);\fP
-.br
-\fBint winchstr(WINDOW *\fP\fIwin\fP\fB, chtype *\fP\fIchstr\fP\fB);\fP
-.br
-\fBint winchnstr(WINDOW *\fP\fIwin\fP\fB, chtype *\fP\fIchstr\fP\fB, int \fP\fIn\fP\fB);\fP
-.sp
-\fBint mvinchstr(int \fP\fIy\fP\fB, int \fP\fIx\fP\fB, chtype *\fP\fIchstr\fP\fB);\fP
-.br
-\fBint mvinchnstr(int \fP\fIy\fP\fB, int \fP\fIx\fP\fB, chtype *\fP\fIchstr\fP\fB, int \fP\fIn\fP\fB);\fP
-.br
-\fBint mvwinchstr(WINDOW *\fP\fIwin\fP\fB, int \fP\fIy\fP\fB, int \fP\fIx\fP\fB, chtype *\fP\fIchstr\fP\fB);\fP
-.br
-\fBint mvwinchnstr(WINDOW *\fP\fIwin\fP\fB, int \fP\fIy\fP\fB, int \fP\fIx\fP\fB, chtype *\fP\fIchstr\fP\fB, int \fP\fIn\fP\fB);\fP
-.br
+.nf
+\fB#include <curses.h>
+.PP
+\fBint inchstr(chtype *\fIchstr\fP);
+\fBint inchnstr(chtype *\fIchstr\fP, int \fIn\fP);
+\fBint winchstr(WINDOW *\fIwin\fP, chtype *\fIchstr\fP);
+\fBint winchnstr(WINDOW *\fIwin\fP, chtype *\fIchstr\fP, int \fIn\fP);
+.PP
+\fBint mvinchstr(int \fIy\fP, int \fIx\fP, chtype *\fIchstr\fP);
+\fBint mvinchnstr(int \fIy\fP, int \fIx\fP, chtype *\fIchstr\fP, int \fIn\fP);
+\fBint mvwinchstr(WINDOW *\fIwin\fP, int \fIy\fP, int \fIx\fP, chtype *\fIchstr\fP);
+\fBint mvwinchnstr(WINDOW *\fIwin\fP, int \fIy\fP, int \fIx\fP, chtype *\fIchstr\fP, int \fIn\fP);
+.fi
.SH DESCRIPTION
These routines return a NULL-terminated array of \fBchtype\fP quantities,
starting at the current cursor position in the named window and ending at the
right margin of the window.
-The four functions with \fIn\fP as
-the last argument, return a leading substring at most \fIn\fP characters long
+.PP
+The four functions with \fIn\fP as the last argument, return
+a leading substring at most \fIn\fP characters long
(exclusive of the trailing (chtype)0).
+Transfer stops at the end of the current line, or when \fIn\fP characters have
+been stored at the location referenced by \fIchstr\fP.
+.PP
Constants defined in \fB<curses.h>\fP can be used with the \fB&\fP (logical
AND) operator to extract the character or the attribute alone from any position
in the \fIchstr\fP [see \fBcurs_inch\fP(3X)].
retrieved, exclusive of the trailing 0).
.PP
X/Open Curses defines no error conditions.
-In this implementation:
+This implementation returns an error
.bP
-If the \fIwin\fP parameter is null, an error is returned,
+if the \fIwin\fP parameter is null or
.bP
-If the \fIchstr\fP parameter is null, an error is returned,
+if the \fIchstr\fP parameter is null.
.PP
-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.
+Functions prefixed with \*(``mv\*('' first perform cursor movement and
+fail if the position
+.RI ( y ,
+.IR x )
+is outside the window boundaries.
.SH NOTES
-Note that all routines except \fBwinchnstr\fP may be macros.
+All routines except \fBwinchnstr\fP may be macros.
+.PP
SVr4 does not
document whether the result string is zero-terminated; it does not document
whether a length limit argument includes any trailing 0; and it does not
document the meaning of the return value.
+.PP
+Reading a line that overflows the array pointed to by
+\fIchstr\fP
+with
+\fBinchstr\fP,
+\fBmvinchstr\fP,
+\fBmvwinchstr\fP
+or
+\fBwinchstr\fP
+causes undefined results.
+Therefore, the use of
+\fBinchnstr\fP,
+\fBmvinchnstr\fP,
+\fBmvwinchnstr\fP, or
+\fBwinchnstr\fP
+is recommended.
.SH PORTABILITY
-These functions are described in the XSI Curses standard, Issue 4.
+These functions are described in X/Open Curses, Issue 4.
It is no
more specific than the SVr4 documentation on the trailing 0.
It does specify
that the successful return of the functions is \fBOK\fP.
.SH SEE ALSO
-\fBcurses\fP(3X), \fBcurs_inch\fP(3X).
-.PP
-Comparable functions in the wide-character (ncursesw) library are
-described in
-\fBcurs_in_wchstr\fP(3X).
+\fB\%curses\fP(3X),
+\fB\%curs_inch\fP(3X),
+\fB\%curs_inwstr\fP(3X),
+\fB\%curs_in_wchstr\fP(3X)
projects / ncurses.git / blobdiff