.\"***************************************************************************
-.\" Copyright (c) 2002-2006,2010 Free Software Foundation, Inc. *
+.\" Copyright (c) 2002-2017,2018 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 *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: curs_get_wstr.3x,v 1.8 2010/12/04 18:36:44 tom Exp $
+.\" $Id: curs_get_wstr.3x,v 1.14 2018/07/28 22:15:59 tom Exp $
.TH curs_get_wstr 3X ""
.na
.hy 0
\fBget_wstr\fR
is as though a series of calls
to
-\fBget_wch\fR
-were made, until a newline, other end-of-line, or end-of-file condition is processed.
-An end-of-file condition is represented by \fBWEOF\fR, as defined in \fB<wchar.h>\fR.
-The newline and end-of-line conditions are represented by the \fB\\n\fR \fBwchar_t\fR value.
+\fBget_wch\fR(3X)
+were made, until a newline, other end-of-line,
+or end-of-file condition is processed.
+An end-of-file condition is represented by \fBWEOF\fR,
+as defined in \fB<wchar.h>\fR.
+The newline and end-of-line conditions are represented
+by the \fB\\n\fR \fBwchar_t\fR value.
In all instances, the end of the string is terminated by a null \fBwchar_t\fR.
The routine places resulting values in the area pointed to by \fIwstr\fR.
.PP
-The user's erase and kill characters are interpreted. If keypad
+The user's erase and kill characters are interpreted.
+If keypad
mode is on for the window, \fBKEY_LEFT\fR and \fBKEY_BACKSPACE\fR
are both considered equivalent to the user's kill character.
.PP
-Characters input are echoed only if \fBecho\fR is currently on. In that case,
+Characters input are echoed only if \fBecho\fR is currently on.
+In that case,
backspace is echoed as deletion of the previous character (typically a left
motion).
.PP
is no way to distinguish a \fBKEY_\fR value from a valid \fBwchar_t\fR value.
.PP
All of these routines except \fBwgetn_wstr\fR may be macros.
-.SH RETURN VALUES
+.SH RETURN VALUE
All of these functions return \fBOK\fR upon successful completion.
Otherwise, they return \fBERR\fR.
.PP
.SH PORTABILITY
These functions are described in The Single Unix Specification, Version 2.
No error conditions are defined.
-This implementation returns ERR if the window pointer is null,
-or if the lower-level \fBwget_wch\fR call returns an ERR.
+This implementation returns \fBERR\fP if the window pointer is null,
+or if the lower-level \fBwget_wch\fR call returns an \fBERR\fP.
In the latter case,
-an ERR return without other data is treated as an end-of-file condition,
+an \fBERR\fP return without other data is treated as an end-of-file condition,
and the returned array contains a \fBWEOF\fR followed by a null \fBwchar_t\fR.
.PP
-X/Open curses documents these functions to pass an array of \fBwchar_t\fR,
-but all of the vendors implement this using \fBwint_t\fR.
+X/Open curses documented these functions to pass an array of \fBwchar_t\fR
+in 1997, but that was an error because of this part of the description:
+.RS
+.PP
+The effect of \fIget_wstr()\fP is as though a series of calls to
+\fIget_wch()\fP were made, until a newline character, end-of-line character, or
+end-of-file character is processed.
+.RE
+.PP
+The latter function \fIget_wch()\fP can return a negative value,
+while \fBwchar_t\fP is a unsigned type.
+All of the vendors implement this using \fBwint_t\fR, following the standard.
.SH SEE ALSO
Functions:
\fBcurses\fR(3X),