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* @Id: curs_scanw.3x,v 1.11 2000/07/15 21:48:17 tom Exp @
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<TITLE>curs_scanw 3x</TITLE><link rev=made href="mailto:bug-ncurses@gnu.org">
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<H1>curs_scanw 3x</H1>
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<PRE>
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<H2>NAME</H2><PRE>
<STRONG>scanw</STRONG>, <STRONG>wscanw</STRONG>, <STRONG>mvscanw</STRONG>, <STRONG>mvwscanw</STRONG>, <STRONG>vwscanw</STRONG>, <STRONG>vw_scanw</STRONG> - con-
vert formatted input from a <STRONG>curses</STRONG> window
</PRE>
<H2>SYNOPSIS</H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>scanw(char</STRONG> <STRONG>*fmt</STRONG> [<STRONG>,</STRONG> <STRONG>arg</STRONG>] <STRONG>...);</STRONG>
<STRONG>int</STRONG> <STRONG>wscanw(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>char</STRONG> <STRONG>*fmt</STRONG> [<STRONG>,</STRONG> <STRONG>arg</STRONG>] <STRONG>...);</STRONG>
<STRONG>int</STRONG> <STRONG>mvscanw(int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>char</STRONG> <STRONG>*fmt</STRONG> [<STRONG>,</STRONG> <STRONG>arg</STRONG>] <STRONG>...);</STRONG>
<STRONG>int</STRONG> <STRONG>mvwscanw(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG>
<STRONG>char</STRONG> <STRONG>*fmt</STRONG> [<STRONG>,</STRONG> <STRONG>arg]</STRONG> <STRONG>...);</STRONG>
<STRONG>int</STRONG> <STRONG>vw_scanw(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>char</STRONG> <STRONG>*fmt,</STRONG> <STRONG>va_list</STRONG> <STRONG>varglist);</STRONG>
<STRONG>int</STRONG> <STRONG>vwscanw(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>char</STRONG> <STRONG>*fmt,</STRONG> <STRONG>va_list</STRONG> <STRONG>varglist);</STRONG>
</PRE>
<H2>DESCRIPTION</H2><PRE>
The <STRONG>scanw</STRONG>, <STRONG>wscanw</STRONG> and <STRONG>mvscanw</STRONG> routines are analogous to
<STRONG>scanf</STRONG> [see <STRONG><A HREF="scanf.3S.html">scanf(3S)</A></STRONG>]. The effect of these routines is as
though <STRONG>wgetstr</STRONG> were called on the window, and the result-
ing line used as input for <STRONG><A HREF="sscanf.3.html">sscanf(3)</A></STRONG>. Fields which do not
map to a variable in the <EM>fmt</EM> field are lost.
The <STRONG>vwscanw</STRONG> routine is similar to <STRONG>vwprintw</STRONG> in that it per-
forms a <STRONG>wscanw</STRONG> using a variable argument list. The third
argument is a <EM>va</EM>_<EM>list</EM>, a pointer to a list of arguments,
as defined in <STRONG><varargs.h></STRONG>.
</PRE>
<H2>RETURN VALUE</H2><PRE>
<STRONG>vwscanw</STRONG> returns <STRONG>ERR</STRONG> on failure and an integer equal to the
number of fields scanned on success.
Applications may use the return value from the <STRONG>scanw</STRONG>,
<STRONG>wscanw</STRONG>, <STRONG>mvscanw</STRONG> and <STRONG>mvwscanw</STRONG> routines to determine the
number of fields which were mapped in the call.
</PRE>
<H2>PORTABILITY</H2><PRE>
The XSI Curses standard, Issue 4 describes these func-
tions. The function <STRONG>vwscanw</STRONG> is marked TO BE WITHDRAWN,
and is to be replaced by a function <STRONG>vw_scanw</STRONG> using the
<STRONG><stdarg.h></STRONG> interface.
</PRE>
<H2>SEE ALSO</H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_getstr.3x.html">curs_getstr(3x)</A></STRONG>, <STRONG><A HREF="curs_printw.3x.html">curs_printw(3x)</A></STRONG>, <STRONG><A HREF="scanf.3S.html">scanf(3S)</A></STRONG>
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