ncurses 6.2 - patch 20200425
[ncurses.git] / doc / html / man / curs_instr.3x.html
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42 <H1 class="no-header">curs_instr 3x</H1>
43 <PRE>
44 <STRONG><A HREF="curs_instr.3x.html">curs_instr(3x)</A></STRONG>                                                  <STRONG><A HREF="curs_instr.3x.html">curs_instr(3x)</A></STRONG>
45
46
47
48
49 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
50        <STRONG>instr</STRONG>,  <STRONG>innstr</STRONG>, <STRONG>winstr</STRONG>, <STRONG>winnstr</STRONG>, <STRONG>mvinstr</STRONG>, <STRONG>mvinnstr</STRONG>, <STRONG>mvwinstr</STRONG>, <STRONG>mvwinnstr</STRONG>
51        - get a string of characters from a <STRONG>curses</STRONG> 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>instr(char</STRONG> <STRONG>*str);</STRONG>
58        <STRONG>int</STRONG> <STRONG>innstr(char</STRONG> <STRONG>*str,</STRONG> <STRONG>int</STRONG> <STRONG>n);</STRONG>
59        <STRONG>int</STRONG> <STRONG>winstr(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>char</STRONG> <STRONG>*str);</STRONG>
60        <STRONG>int</STRONG> <STRONG>winnstr(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>char</STRONG> <STRONG>*str,</STRONG> <STRONG>int</STRONG> <STRONG>n);</STRONG>
61        <STRONG>int</STRONG> <STRONG>mvinstr(int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>char</STRONG> <STRONG>*str);</STRONG>
62        <STRONG>int</STRONG> <STRONG>mvinnstr(int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>char</STRONG> <STRONG>*str,</STRONG> <STRONG>int</STRONG> <STRONG>n);</STRONG>
63        <STRONG>int</STRONG> <STRONG>mvwinstr(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>char</STRONG> <STRONG>*str);</STRONG>
64        <STRONG>int</STRONG> <STRONG>mvwinnstr(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>char</STRONG> <STRONG>*str,</STRONG> <STRONG>int</STRONG> <STRONG>n);</STRONG>
65
66
67 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
68        These routines return a string of characters in <EM>str</EM>, extracted starting
69        at  the  current  cursor  position in the named window.  Attributes are
70        stripped from the characters.  The four functions with <EM>n</EM>  as  the  last
71        argument  return  a leading substring at most <EM>n</EM> characters long (exclu-
72        sive of the trailing NUL).
73
74
75 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
76        All of the functions return <STRONG>ERR</STRONG> upon failure, or the number of  charac-
77        ters actually read into the string.
78
79        X/Open Curses defines no error conditions.  In this implementation:
80
81        <STRONG>o</STRONG>   If the <EM>win</EM> parameter is null, an error is returned,
82
83        <STRONG>o</STRONG>   If the <EM>chstr</EM> parameter is null, an error is returned,
84
85        Functions  with  a  "mv"  prefix  first perform a cursor movement using
86        <STRONG>wmove</STRONG>, and return an error if the position is outside the window, or if
87        the window pointer is null.
88
89
90 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
91        Note that all routines except <STRONG>winnstr</STRONG> may be macros.
92
93
94 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
95        SVr4  does not document whether a length limit includes or excludes the
96        trailing NUL.
97
98        The ncurses library extends the XSI description by allowing a  negative
99        value  for  <EM>n</EM>.  In this case, the functions return the string ending at
100        the right margin.
101
102
103 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
104        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>.
105
106
107
108                                                                 <STRONG><A HREF="curs_instr.3x.html">curs_instr(3x)</A></STRONG>
109 </PRE>
110 <div class="nav">
111 <ul>
112 <li><a href="#h2-NAME">NAME</a></li>
113 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
114 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
115 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
116 <li><a href="#h2-NOTES">NOTES</a></li>
117 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
118 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
119 </ul>
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