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| <H1 class="no-header">curs_instr 3x 2024-04-20 ncurses 6.5 Library calls</H1> |
| <PRE> |
| <STRONG><A HREF="curs_instr.3x.html">curs_instr(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_instr.3x.html">curs_instr(3x)</A></STRONG> |
| |
| |
| |
| |
| </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE> |
| <STRONG>instr</STRONG>, <STRONG>innstr</STRONG>, <STRONG>winstr</STRONG>, <STRONG>winnstr</STRONG>, <STRONG>mvinstr</STRONG>, <STRONG>mvinnstr</STRONG>, <STRONG>mvwinstr</STRONG>, <STRONG>mvwinnstr</STRONG> |
| - get a string from a <EM>curses</EM> window |
| |
| |
| </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE> |
| <STRONG>#include</STRONG> <STRONG><curses.h></STRONG> |
| |
| <STRONG>int</STRONG> <STRONG>instr(char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>innstr(char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>winstr(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>winnstr(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG> |
| |
| <STRONG>int</STRONG> <STRONG>mvinstr(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>mvinnstr(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>mvwinstr(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>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>mvwinnstr(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>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG> |
| |
| |
| </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE> |
| These routines return a string of characters in <EM>str</EM>, starting at the |
| current cursor position in the named window. Attributes are stripped |
| from the characters. |
| |
| 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>str</EM>. |
| |
| |
| </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE> |
| All of the functions return <STRONG>ERR</STRONG> upon failure, or the number of |
| characters actually read into the string. |
| |
| X/Open Curses defines no error conditions. This implementation returns |
| an error |
| |
| <STRONG>o</STRONG> if the <EM>win</EM> parameter is null or |
| |
| <STRONG>o</STRONG> if the <EM>chstr</EM> parameter is null. |
| |
| 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> |
| All routines except <STRONG>winnstr</STRONG> may be macros. |
| |
| Reading a line that overflows the array pointed to by <EM>str</EM> with <STRONG>instr</STRONG>, |
| <STRONG>mvinstr</STRONG>, <STRONG>mvwinstr</STRONG> or <STRONG>winstr</STRONG> causes undefined results. Therefore, the |
| use of <STRONG>innstr</STRONG>, <STRONG>mvinnstr</STRONG>, <STRONG>mvwinnstr</STRONG>, or <STRONG>winnstr</STRONG> is recommended. |
| |
| |
| </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE> |
| SVr4 does not document whether a length limit includes or excludes the |
| trailing NUL. |
| |
| The <EM>ncurses</EM> library extends the X/Open Curses description by allowing a |
| negative value for <EM>n</EM>. In this case, the functions return the string |
| ending at the right margin. |
| |
| |
| </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE> |
| <STRONG><A HREF="curs_ins_wstr.3x.html">curs_ins_wstr(3x)</A></STRONG> describes comparable functions of the <EM>ncurses</EM> library |
| in its wide-character configuration (<EM>ncursesw</EM>). |
| |
| <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_inch.3x.html">curs_inch(3x)</A></STRONG>, <STRONG><A HREF="curs_inchstr.3x.html">curs_inchstr(3x)</A></STRONG> |
| |
| |
| |
| ncurses 6.5 2024-04-20 <STRONG><A HREF="curs_instr.3x.html">curs_instr(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> |
| <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li> |
| <li><a href="#h2-NOTES">NOTES</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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