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-  * @Id: curs_inwstr.3x,v 1.25 2023/09/16 23:37:03 tom Exp @
+  * @Id: curs_inwstr.3x,v 1.45 2024/06/08 21:19:18 tom Exp @
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-<TITLE>curs_inwstr 3x 2023-09-16 ncurses 6.4 Library calls</TITLE>
+<TITLE>curs_inwstr 3x 2024-06-08 ncurses 6.5 Library calls</TITLE>
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-<H1 class="no-header">curs_inwstr 3x 2023-09-16 ncurses 6.4 Library calls</H1>
+<H1 class="no-header">curs_inwstr 3x 2024-06-08 ncurses 6.5 Library calls</H1>
 <PRE>
 <STRONG><A HREF="curs_inwstr.3x.html">curs_inwstr(3x)</A></STRONG>                  Library calls                 <STRONG><A HREF="curs_inwstr.3x.html">curs_inwstr(3x)</A></STRONG>
 
 <PRE>
 <STRONG><A HREF="curs_inwstr.3x.html">curs_inwstr(3x)</A></STRONG>                  Library calls                 <STRONG><A HREF="curs_inwstr.3x.html">curs_inwstr(3x)</A></STRONG>
 
 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
 
 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
 
-       <STRONG>int</STRONG> <STRONG>inwstr(wchar_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>);</STRONG>
-       <STRONG>int</STRONG> <STRONG>innwstr(wchar_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
-       <STRONG>int</STRONG> <STRONG>winwstr(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>);</STRONG>
-       <STRONG>int</STRONG> <STRONG>winnwstr(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
+       <STRONG>int</STRONG> <STRONG>inwstr(wchar_t</STRONG> <STRONG>*</STRONG> <EM>wstr</EM><STRONG>);</STRONG>
+       <STRONG>int</STRONG> <STRONG>winwstr(WINDOW</STRONG> <STRONG>*</STRONG> <EM>win</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG> <EM>wstr</EM><STRONG>);</STRONG>
+       <STRONG>int</STRONG> <STRONG>mvinwstr(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG> <EM>wstr</EM><STRONG>);</STRONG>
+       <STRONG>int</STRONG> <STRONG>mvwinwstr(WINDOW</STRONG> <STRONG>*</STRONG> <EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG> <EM>wstr</EM><STRONG>);</STRONG>
 
 
-       <STRONG>int</STRONG> <STRONG>mvinwstr(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>);</STRONG>
-       <STRONG>int</STRONG> <STRONG>mvinnwstr(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
-       <STRONG>int</STRONG> <STRONG>mvwinwstr(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>);</STRONG>
-       <STRONG>int</STRONG> <STRONG>mvwinnwstr(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
+       <STRONG>int</STRONG> <STRONG>innwstr(wchar_t</STRONG> <STRONG>*</STRONG> <EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
+       <STRONG>int</STRONG> <STRONG>winnwstr(WINDOW</STRONG> <STRONG>*</STRONG> <EM>win</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG> <EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
+       <STRONG>int</STRONG> <STRONG>mvinnwstr(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG> <EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
+       <STRONG>int</STRONG> <STRONG>mvwinnwstr(WINDOW</STRONG> <STRONG>*</STRONG> <EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*</STRONG> <EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
 
 
 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
 
 
 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
-       These routines return a string of  <STRONG>wchar_t</STRONG>  wide  characters  in  <EM>wstr</EM>,
-       extracted starting at the current cursor position in the named window.
+       <STRONG>winwstr</STRONG> extracts a wide-character string  from  a  <EM>curses</EM>  window  <EM>win</EM>,
+       starting  at the cursor and stopping at the end of the line, and stores
+       it in <EM>wstr</EM>, terminating it with a wide null character and omitting  any
+       attributes  and  color pair identifier that <EM>curses</EM> associates with each
+       character.  <STRONG>winnwstr</STRONG> does the same, but copies  at  most  <EM>n</EM>  characters
+       from  <EM>win</EM>.   An  <EM>n</EM>  of  <STRONG>-1</STRONG>  implies  no limit; <STRONG>winnwstr</STRONG> then works like
+       <STRONG>winwstr</STRONG>.  <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG> describes the variants of these functions.
 
 
-       The  four  functions  with  <EM>n</EM>  as  the  last  argument return a leading
-       substring at most <EM>n</EM> characters long (exclusive of  the  trailing  NUL).
-       Transfer  stops  at  the  end of the current line, or when <EM>n</EM> characters
-       have been stored at the location referenced by <EM>wstr</EM>.
 
 
-       If the size  <EM>n</EM>  is  not  large  enough  to  store  a  complete  complex
-       character, an error is generated.
+</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
+       On successful operation, these  functions  return  the  count  of  wide
+       characters  copied  from  <EM>win</EM>  to  <EM>wstr</EM>.  They return <STRONG>ERR</STRONG> upon failure.
+       <STRONG>innwstr</STRONG>, <STRONG>winnwstr</STRONG>,  <STRONG>mvinnwstr</STRONG>,  and  <STRONG>mvwinnwstr</STRONG>  return  <STRONG>ERR</STRONG>  if  <EM>n</EM>  is
+       insufficiently  large  to  store  a  complete  wide  character  string.
+       (Recall that a <EM>curses</EM>  complex  character  can  contain  multiple  wide
+       characters, some of which may be non-spacing.)
+
+       In <EM>ncurses</EM>, these functions return <STRONG>ERR</STRONG> if
+
+       <STRONG>o</STRONG>   <EM>win</EM> is <STRONG>NULL</STRONG> or
+
+       <STRONG>o</STRONG>   <EM>wstr</EM> is <STRONG>NULL</STRONG>.
+
+       Functions  prefixed with "mv" first perform cursor movement and fail if
+       the position (<EM>y</EM>, <EM>x</EM>) is outside the window boundaries.
 
 
 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
 
 
 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
-       All routines except <STRONG>winnwstr</STRONG> may be macros.
+       All of these functions except <STRONG>winnwstr</STRONG> may be implemented as macros.
 
 
-       Each  cell  in  the  window  holds a complex character (i.e., base- and
-       combining-characters)  together  with  attributes  and  color.    These
-       functions  store  only  the  wide  characters,  ignoring attributes and
-       color.  Use <STRONG>in_wchstr</STRONG> to return the complex characters from a window.
+       Reading a line that overflows the array pointed to by <EM>str</EM> with  <STRONG>inwstr</STRONG>,
+       <STRONG>winwstr</STRONG>,  <STRONG>mvinwstr</STRONG>,  or  <STRONG>mvwinwstr</STRONG>  causes  undefined  results.  Use of
+       <STRONG>innwstr</STRONG>, <STRONG>winnwstr</STRONG>, <STRONG>mvinnwstr</STRONG>, and <STRONG>mvwinnwstr</STRONG> is recommended instead.
 
 
 
 
-</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
-       All routines return <STRONG>ERR</STRONG> upon failure.  Upon successful completion,  the
-       *<STRONG>inwstr</STRONG> routines return <STRONG>OK</STRONG>, and the *<STRONG>innwstr</STRONG> routines return the number
-       of characters read into the string.
+</PRE><H2><a name="h2-EXTENSIONS">EXTENSIONS</a></H2><PRE>
+       <STRONG>innwstr</STRONG>, <STRONG>winnwstr</STRONG>, <STRONG>mvinnwstr</STRONG>, and <STRONG>mvwinnwstr</STRONG>'s treatment  of  <STRONG>-1</STRONG>  as  a
+       valid value of <EM>n</EM> is an <EM>ncurses</EM> extension.
+
 
 
-       Functions with a "mv" prefix first  perform  a  cursor  movement  using
-       <STRONG>wmove</STRONG>, and return an error if the position is outside the window, or if
-       the window pointer is null.
+</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+       Applications employing <EM>ncurses</EM> extensions should condition their use on
+       the visibility of the <STRONG>NCURSES_VERSION</STRONG> preprocessor macro.
+
+       X/Open Curses, Issue 4 describes  these  functions.   It  specifies  no
+       error conditions for them.
+
+       Notwithstanding  the foregoing, X/Open Curses Issues 4 and 7 both state
+       that <STRONG>innwstr</STRONG>, <STRONG>winnwstr</STRONG>, <STRONG>mvinnwstr</STRONG>, and <STRONG>mvwinnwstr</STRONG> "fail  ...  [i]f  the
+       array  is  not  large  enough  to  contain  any  complete  characters".
+       Strictly interpreted, this means  that  a  caller  of  these  functions
+       cannot use their return values to detect truncation of a wide-character
+       string copied from more  than  one  character  cell  in  <EM>win</EM>.   <EM>ncurses</EM>
+       reports any truncation with <STRONG>ERR</STRONG>.
+
+       X/Open  Curses  specifies  <STRONG>inwstr</STRONG>,  <STRONG>winwstr</STRONG>, <STRONG>mvinwstr</STRONG>, and <STRONG>mvwinwstr</STRONG> as
+       returning <STRONG>OK</STRONG> rather than a (wide) character count,  unlike  their  non-
+       wide  counterparts  <STRONG>instr</STRONG>,  <STRONG>winstr</STRONG>,  <STRONG>mvinstr</STRONG>,  and  <STRONG>mvwinstr</STRONG>.   <EM>ncurses</EM>
+       regards this inconsistency as an error in the standard.
 
 
 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 
 
 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
-       <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_instr.3x.html">curs_instr(3x)</A></STRONG>, <STRONG><A HREF="curs_in_wchstr.3x.html">curs_in_wchstr(3x)</A></STRONG>
+       <STRONG><A HREF="curs_instr.3x.html">curs_instr(3x)</A></STRONG> describes comparable functions of the <EM>ncurses</EM> library in
+       its non-wide-character configuration.
 
 
+       <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_in_wch.3x.html">curs_in_wch(3x)</A></STRONG>, <STRONG><A HREF="curs_in_wchstr.3x.html">curs_in_wchstr(3x)</A></STRONG>
 
 
 
 
-ncurses 6.4                       2023-09-16                   <STRONG><A HREF="curs_inwstr.3x.html">curs_inwstr(3x)</A></STRONG>
+
+ncurses 6.5                       2024-06-08                   <STRONG><A HREF="curs_inwstr.3x.html">curs_inwstr(3x)</A></STRONG>
 </PRE>
 <div class="nav">
 <ul>
 <li><a href="#h2-NAME">NAME</a></li>
 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
 </PRE>
 <div class="nav">
 <ul>
 <li><a href="#h2-NAME">NAME</a></li>
 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
-<li><a href="#h2-NOTES">NOTES</a></li>
 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
+<li><a href="#h2-NOTES">NOTES</a></li>
+<li><a href="#h2-EXTENSIONS">EXTENSIONS</a></li>
+<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 </ul>
 </div>
 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 </ul>
 </div>