ncurses 6.1 - patch 20180728

[ncurses.git] / man / curs_get_wstr.3x

diff --git a/man/curs_get_wstr.3x b/man/curs_get_wstr.3x
index 22f0e0685af923b5b93a44390545a933bd0c0a18..43bd53072b33423810a403d304b3699aefee4f30 100644 (file)
--- a/man/curs_get_wstr.3x
+++ b/man/curs_get_wstr.3x
@@ -1,5 +1,5 @@
 .\"***************************************************************************
 .\"***************************************************************************

-.\" Copyright (c) 2002-2012,2017 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            *
 .\"                                                                          *
 .\" Permission is hereby granted, free of charge, to any person obtaining a  *
 .\" copy of this software and associated documentation files (the            *


@@ -26,7 +26,7 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"

-.\" $Id: curs_get_wstr.3x,v 1.10 2017/01/07 19:25:15 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
 .TH curs_get_wstr 3X ""
 .na
 .hy 0


@@ -67,17 +67,22 @@ The effect of
 is as though a series of calls
 to
 \fBget_wch\fR(3X)
 is as though a series of calls
 to
 \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.
+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
 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
 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
 backspace is echoed as deletion of the previous character (typically a left
 motion).
 .PP


@@ -161,14 +166,24 @@ or if the window pointer is null.
 .SH PORTABILITY
 These functions are described in The Single Unix Specification, Version 2.
 No error conditions are defined.
 .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,
 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
 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),
 .SH SEE ALSO
 Functions:
 \fBcurses\fR(3X),