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  37 <TITLE>curs_printw 3x 2024-03-23 ncurses 6.4 Library calls</TITLE>
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  42 <H1 class="no-header">curs_printw 3x 2024-03-23 ncurses 6.4 Library calls</H1>
  43 <PRE>
  44 <STRONG><A HREF="curs_printw.3x.html">curs_printw(3x)</A></STRONG>                  Library calls                 <STRONG><A HREF="curs_printw.3x.html">curs_printw(3x)</A></STRONG>
  45
  46
  47
  48
  49 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
  50        <STRONG>printw</STRONG>,  <STRONG>wprintw</STRONG>,  <STRONG>mvprintw</STRONG>,  <STRONG>mvwprintw</STRONG>,  <STRONG>vwprintw</STRONG>,  <STRONG>vw_printw</STRONG>  - write
  51        formatted output to a <EM>curses</EM> window
  52
  53
  54 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
  55        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  56
  57        <STRONG>int</STRONG> <STRONG>printw(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
  58        <STRONG>int</STRONG> <STRONG>wprintw(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
  59        <STRONG>int</STRONG> <STRONG>mvprintw(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
  60        <STRONG>int</STRONG> <STRONG>mvwprintw(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>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
  61
  62        <STRONG>int</STRONG> <STRONG>vw_printw(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>va_list</STRONG> <EM>varglist</EM><STRONG>);</STRONG>
  63
  64        <EM>/*</EM> <EM>obsolete</EM> <EM>*/</EM>
  65        <STRONG>int</STRONG> <STRONG>vwprintw(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>va_list</STRONG> <EM>varglist</EM><STRONG>);</STRONG>
  66
  67
  68 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
  69        <STRONG>printw</STRONG>, <STRONG>wprintw</STRONG>, <STRONG>mvprintw</STRONG>, and <STRONG>mvwprintw</STRONG> are  analogous  to  <STRONG>printf(3)</STRONG>.
  70        In  effect,  the  string  that  would be output by <STRONG>printf(3)</STRONG> is instead
  71        output as though <STRONG><A HREF="curs_addstr.3x.html">waddstr(3x)</A></STRONG> were used with  <EM>win</EM>  (or  <STRONG>stdscr</STRONG>)  as  its
  72        first argument.
  73
  74        <STRONG>vwprintw</STRONG>  and  <STRONG>vw_printw</STRONG>  are  analogous  to  <STRONG>vprintf(3)</STRONG>, and perform a
  75        <STRONG>wprintw</STRONG> using a variable  argument  list.   The  third  argument  is  a
  76        <EM>va</EM><STRONG>_</STRONG><EM>list</EM>, a pointer to a list of arguments, as defined in <EM>stdarg.h</EM>.
  77
  78
  79 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
  80        These functions return <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> upon success.
  81
  82        In <EM>ncurses</EM>, failure occurs if the library cannot allocate enough memory
  83        for the buffer into which the output is formatted,  or  if  the  window
  84        pointer <EM>win</EM> is null.
  85
  86        Functions  with  a  "mv"  prefix  first perform a cursor movement using
  87        <STRONG>wmove</STRONG>, and fail if the position is outside the window.
  88
  89
  90 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
  91        No wide character counterpart  functions  are  defined  by  the  "wide"
  92        <EM>ncurses</EM> configuration nor by any standard.  To format and write a wide-
  93        character string to a <EM>curses</EM> window,  consider  using  <STRONG>swprintf(3)</STRONG>  and
  94        <STRONG><A HREF="curs_addwstr.3x.html">waddwstr(3x)</A></STRONG> or similar.
  95
  96
  97 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
  98        X/Open  Curses,  Issue  4,  describes these functions.  It specifies no
  99        error conditions for them.
 100
 101        <EM>ncurses</EM> defines <STRONG>vw_printw</STRONG> and <STRONG>vwprintw</STRONG> identically  to  support  legacy
 102        applications.  However, the latter is obsolete.
 103
 104        <STRONG>o</STRONG>   X/Open  Curses,  Issue  4,  Version  2  (1996),  marked <STRONG>vwprintw</STRONG> as
 105            requiring <EM>varargs.h</EM> and "TO BE WITHDRAWN", and specified  <STRONG>vw_printw</STRONG>
 106            using the <EM>stdarg.h</EM> interface.
 107
 108        <STRONG>o</STRONG>   X/Open  Curses,  Issue  5,  Draft 2 (December 2007) marked <STRONG>vwprintw</STRONG>
 109            (along with <STRONG>vwscanw</STRONG> and the <EM>termcap</EM> interface) as withdrawn.  After
 110            incorporating  review  comments, this became X/Open Curses, Issue 7
 111            (2009).
 112
 113        <STRONG>o</STRONG>   <EM>ncurses</EM> provides <STRONG>vwprintw</STRONG>, but marks it as deprecated.
 114
 115
 116 </PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
 117        While <STRONG>printw</STRONG> was implemented in 4BSD (November  1980),  it  was  unused
 118        until  4.2BSD  (August  1983), which employed it for games.  That early
 119        version of <EM>curses</EM> preceded the ANSI C standard of 1989.  It did not use
 120        <EM>varargs.h</EM>,  though  that  had been available since Seventh Edition Unix
 121        (1979).  In 1991 (a couple of years after SVr4 was generally available,
 122        and  after  the C standard was published), other developers updated the
 123        library, using <EM>stdarg.h</EM> internally in 4.4BSD <EM>curses</EM>.   Even  with  this
 124        improvement,  BSD  <EM>curses</EM>  did  not  use  function prototypes (nor even
 125        declare functions) in <EM>curses.h</EM> until 1992.
 126
 127        SVr2 (1984) documented <STRONG>printw</STRONG> and <STRONG>wprintw</STRONG> tersely as "printf on <STRONG>stdscr</STRONG>"
 128        and "printf on <EM>win</EM>", respectively.
 129
 130        SVr3  (1987)  added  <STRONG>mvprintw</STRONG>  and <STRONG>mvwprintw</STRONG>, with a three-line summary
 131        asserting that they were analogous to <STRONG>printf(3)</STRONG>,  explaining  that  the
 132        string  that  <STRONG>printf(3)</STRONG> would write to the standard output stream would
 133        instead be output  using  <STRONG>waddstr</STRONG>  to  the  given  window.   SVr3  also
 134        implemented  <STRONG>vwprintw</STRONG>,  describing  its  third  parameter as a <EM>va</EM><STRONG>_</STRONG><EM>list</EM>,
 135        defined in <EM>varargs.h</EM>, and referred the reader to the manual  pages  for
 136        <EM>varargs</EM> and <EM>vprintf</EM> for detailed descriptions.
 137
 138        SVr4  (1989)  introduced  no new variations of <EM>printw</EM>, but provided for
 139        using either <EM>varargs.h</EM> or <EM>stdarg.h</EM> to define the <EM>va</EM><STRONG>_</STRONG><EM>list</EM> type.
 140
 141        X/Open Curses, Issue 4 (1995), defined <STRONG>vw_printw</STRONG> to  replace  <STRONG>vwprintw</STRONG>,
 142        stating that its <EM>va</EM><STRONG>_</STRONG><EM>list</EM> type is defined in <EM>stdarg.h</EM>.
 143
 144
 145 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 146        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_addstr.3x.html">curs_addstr(3x)</A></STRONG>, <STRONG><A HREF="curs_scanw.3x.html">curs_scanw(3x)</A></STRONG>, <STRONG>printf(3)</STRONG>, <STRONG>vprintf(3)</STRONG>
 147
 148
 149
 150 ncurses 6.4                       2024-03-23                   <STRONG><A HREF="curs_printw.3x.html">curs_printw(3x)</A></STRONG>
 151 </PRE>
 152 <div class="nav">
 153 <ul>
 154 <li><a href="#h2-NAME">NAME</a></li>
 155 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 156 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
 157 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 158 <li><a href="#h2-NOTES">NOTES</a></li>
 159 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 160 <li><a href="#h2-HISTORY">HISTORY</a></li>
 161 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 162 </ul>
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