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+ * Copyright 2018-2019,2020 Thomas E. Dickey *
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- * @Id: curs_printw.3x,v 1.22 2018/04/07 20:18:55 tom Exp @
+ * @Id: curs_printw.3x,v 1.27 2020/07/10 23:06:23 William.Pursell Exp @
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<STRONG>printf</STRONG> is output instead as though <STRONG>waddstr</STRONG> were used on the given win-
dow.
- The <STRONG>vwprintw</STRONG> and <STRONG>wv_printw</STRONG> routines are analogous to <STRONG>vprintf</STRONG> [see
+ The <STRONG>vwprintw</STRONG> and <STRONG>vw_printw</STRONG> routines are analogous to <STRONG>vprintf</STRONG> [see
<STRONG>printf(3)</STRONG>] and perform a <STRONG>wprintw</STRONG> using a variable argument list. The
third argument is a <STRONG>va_list</STRONG>, a pointer to a list of arguments, as de-
fined in <STRONG><stdarg.h></STRONG>.
the window pointer is null.
+</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
+ While <STRONG>printw</STRONG> was implemented in 4BSD, it was unused until 4.2BSD (which
+ used it in games). That early version of curses was before the ANSI C
+ standard. It did not use <varargs.h>, though that was available. In
+ 1991 (a couple of years after SVr4 was generally available, and after
+ the C standard was published), other developers updated the library,
+ using <stdarg.h> internally in 4.4BSD curses. Even with this improve-
+ ment, BSD curses did not use function prototypes (or even declare func-
+ tions) in the <curses.h> header until 1992.
+
+ SVr2 documented <STRONG>printw</STRONG>, <STRONG>wprintw</STRONG> tersely as "printf on <EM>stdscr</EM>" and
+ tersely as "printf on <EM>win</EM>", respectively.
+
+ SVr3 added <STRONG>mvprintw</STRONG>, and <STRONG>mvwprintw</STRONG>, with a three-line summary saying
+ that they were analogous to <STRONG>printf(3)</STRONG>, explaining that the string which
+ would be output from <STRONG>printf(3)</STRONG> would instead be output using <STRONG>waddstr</STRONG> on
+ the given window. SVr3 also added <STRONG>vwprintw</STRONG>, saying that the third pa-
+ rameter is a <STRONG>va_list</STRONG>, defined in <varargs.h>, and referring the reader
+ to the manual pages for <EM>varargs</EM> and <EM>vprintf</EM> for detailed descriptions.
+
+ SVr4 added no new variations of <STRONG>printw</STRONG>, but provided for using
+ <varargs.h> or <stdarg.h> to define the <STRONG>va_list</STRONG> type.
+
+ X/Open Curses added <STRONG>vw_printw</STRONG> to replace <STRONG>vwprintw</STRONG>, stating that its
+ <STRONG>va_list</STRONG> definition requires <stdarg.h>.
+
+
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- In this implementation, <STRONG>vw_printw</STRONG> and <STRONG>vwprintw</STRONG> are equivalent, to sup-
+ In this implementation, <STRONG>vw_printw</STRONG> and <STRONG>vwprintw</STRONG> are equivalent, to sup-
port legacy applications. However, the latter (<STRONG>vwprintw</STRONG>) is obsolete:
- <STRONG>o</STRONG> The XSI Curses standard, Issue 4 described these functions. The
- function <STRONG>vwprintw</STRONG> is marked TO BE WITHDRAWN, and is to be replaced
+ <STRONG>o</STRONG> The XSI Curses standard, Issue 4 described these functions. The
+ function <STRONG>vwprintw</STRONG> is marked TO BE WITHDRAWN, and is to be replaced
by a function <STRONG>vw_printw</STRONG> using the <STRONG><stdarg.h></STRONG> interface.
- <STRONG>o</STRONG> The Single Unix Specification, Version 2 states that <STRONG>vw_printw</STRONG> is
- preferred to <STRONG>vwprintw</STRONG> since the latter requires including
- <STRONG><varargs.h></STRONG>, which cannot be used in the same file as <STRONG><stdarg.h></STRONG>.
- This implementation uses <STRONG><stdarg.h></STRONG> for both, because that header
+ <STRONG>o</STRONG> The Single Unix Specification, Version 2 states that <STRONG>vw_printw</STRONG> is
+ preferred to <STRONG>vwprintw</STRONG> since the latter requires including
+ <STRONG><varargs.h></STRONG>, which cannot be used in the same file as <STRONG><stdarg.h></STRONG>.
+ This implementation uses <STRONG><stdarg.h></STRONG> for both, because that header
is included in <STRONG><curses.h</STRONG>>.
- <STRONG>o</STRONG> X/Open Curses, Issue 5 (December 2007) marked <STRONG>vwprintw</STRONG> (along with
+ <STRONG>o</STRONG> X/Open Curses, Issue 5 (December 2007) marked <STRONG>vwprintw</STRONG> (along with
<STRONG>vwscanw</STRONG> and the termcap interface) as withdrawn.
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
+<li><a href="#h2-HISTORY">HISTORY</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
</ul>
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