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| <H1 class="no-header">curs_get_wstr 3x</H1> |
| <PRE> |
| <STRONG><A HREF="curs_get_wstr.3x.html">curs_get_wstr(3x)</A></STRONG> <STRONG><A HREF="curs_get_wstr.3x.html">curs_get_wstr(3x)</A></STRONG> |
| |
| |
| |
| |
| </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE> |
| <STRONG>get_wstr</STRONG>, <STRONG>getn_wstr</STRONG>, <STRONG>wget_wstr</STRONG>, <STRONG>wgetn_wstr</STRONG>, <STRONG>mvget_wstr</STRONG>, <STRONG>mvgetn_wstr</STRONG>, |
| <STRONG>mvwget_wstr</STRONG>, <STRONG>mvwgetn_wstr</STRONG> - get an array of wide characters from a |
| curses terminal keyboard |
| |
| |
| </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE> |
| <STRONG>#include</STRONG> <STRONG><curses.h></STRONG> |
| |
| <STRONG>int</STRONG> <STRONG>get_wstr(wint_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>getn_wstr(wint_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>wget_wstr(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>wint_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>wgetn_wstr(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>wint_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG> |
| |
| <STRONG>int</STRONG> <STRONG>mvget_wstr(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wint_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>mvgetn_wstr(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>wint_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>mvwget_wstr(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>wint_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>);</STRONG> |
| <STRONG>int</STRONG> <STRONG>mvwgetn_wstr(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>wint_t</STRONG> <STRONG>*</STRONG><EM>wstr</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG> |
| |
| |
| </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE> |
| The effect of <STRONG>get_wstr</STRONG> is as though a series of calls to <STRONG><A HREF="curs_get_wch.3x.html">get_wch(3x)</A></STRONG> |
| were made, until a newline, other end-of-line, or end-of-file condition |
| is processed. An end-of-file condition is represented by <STRONG>WEOF</STRONG>, as de- |
| fined in <STRONG><wchar.h></STRONG>. The newline and end-of-line conditions are repre- |
| sented by the <STRONG>\n</STRONG> <STRONG>wchar_t</STRONG> value. In all instances, the end of the |
| string is terminated by a null <STRONG>wchar_t</STRONG>. The routine places resulting |
| values in the area pointed to by <EM>wstr</EM>. |
| |
| The user's erase and kill characters are interpreted. If keypad mode |
| is on for the window, <STRONG>KEY_LEFT</STRONG> and <STRONG>KEY_BACKSPACE</STRONG> are both considered |
| equivalent to the user's kill character. |
| |
| Characters input are echoed only if <STRONG>echo</STRONG> is currently on. In that |
| case, backspace is echoed as deletion of the previous character (typi- |
| cally a left motion). |
| |
| The effect of <STRONG>wget_wstr</STRONG> is as though a series of calls to <STRONG>wget_wch</STRONG> were |
| made. |
| |
| The effect of <STRONG>mvget_wstr</STRONG> is as though a call to <STRONG>move</STRONG> and then a series |
| of calls to <STRONG>get_wch</STRONG> were made. |
| |
| The effect of <STRONG>mvwget_wstr</STRONG> is as though a call to <STRONG>wmove</STRONG> and then a se- |
| ries of calls to <STRONG>wget_wch</STRONG> were made. |
| |
| The <STRONG>getn_wstr</STRONG>, <STRONG>mvgetn_wstr</STRONG>, <STRONG>mvwgetn_wstr</STRONG>, and <STRONG>wgetn_wstr</STRONG> functions are |
| identical to the <STRONG>get_wstr</STRONG>, <STRONG>mvget_wstr</STRONG>, <STRONG>mvwget_wstr</STRONG>, and <STRONG>wget_wstr</STRONG> func- |
| tions, respectively, except that the <STRONG>*n_*</STRONG> versions read at most <EM>n</EM> char- |
| acters, letting the application prevent overflow of the input buffer. |
| |
| |
| </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE> |
| Using <STRONG>get_wstr</STRONG>, <STRONG>mvget_wstr</STRONG>, <STRONG>mvwget_wstr</STRONG>, or <STRONG>wget_wstr</STRONG> to read a line |
| that overflows the array pointed to by <STRONG>wstr</STRONG> causes undefined results. |
| The use of <STRONG>getn_wstr</STRONG>, <STRONG>mvgetn_wstr</STRONG>, <STRONG>mvwgetn_wstr</STRONG>, or <STRONG>wgetn_wstr</STRONG>, respec- |
| tively, is recommended. |
| |
| These functions cannot return <STRONG>KEY_</STRONG> values because there is no way to |
| distinguish a <STRONG>KEY_</STRONG> value from a valid <STRONG>wchar_t</STRONG> value. |
| |
| All of these routines except <STRONG>wgetn_wstr</STRONG> may be macros. |
| |
| |
| </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE> |
| All of these functions return <STRONG>OK</STRONG> upon successful completion. Other- |
| wise, they return <STRONG>ERR</STRONG>. |
| |
| Functions using a window parameter return an error if it is null. |
| |
| <STRONG>wgetn_wstr</STRONG> |
| returns an error if the associated call to <STRONG>wget_wch</STRONG> failed. |
| |
| Functions with a "mv" prefix first perform a cursor movement using |
| <STRONG>wmove</STRONG>, and return an error if the position is outside the window, or if |
| the window pointer is null. |
| |
| |
| </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE> |
| These functions are described in The Single Unix Specification, Version |
| 2. No error conditions are defined. This implementation returns <STRONG>ERR</STRONG> |
| if the window pointer is null, or if the lower-level <STRONG>wget_wch</STRONG> call re- |
| turns an <STRONG>ERR</STRONG>. In the latter case, an <STRONG>ERR</STRONG> return without other data is |
| treated as an end-of-file condition, and the returned array contains a |
| <STRONG>WEOF</STRONG> followed by a null <STRONG>wchar_t</STRONG>. |
| |
| X/Open curses documented these functions to pass an array of <STRONG>wchar_t</STRONG> in |
| 1997, but that was an error because of this part of the description: |
| |
| The effect of <EM>get</EM><STRONG>_</STRONG><EM>wstr()</EM> is as though a series of calls to |
| <EM>get</EM><STRONG>_</STRONG><EM>wch()</EM> were made, until a newline character, end-of-line |
| character, or end-of-file character is processed. |
| |
| The latter function <EM>get</EM><STRONG>_</STRONG><EM>wch()</EM> can return a negative value, while |
| <STRONG>wchar_t</STRONG> is a unsigned type. All of the vendors implement this using |
| <STRONG>wint_t</STRONG>, following the standard. |
| |
| X/Open Curses, Issue 7 (2009) is unclear regarding whether the termi- |
| nating <EM>null</EM> <STRONG>wchar_t</STRONG> value is counted in the length parameter <EM>n</EM>. X/Open |
| Curses, Issue 7 revised the corresponding description of <STRONG>wgetnstr</STRONG> to |
| address this issue. The unrevised description of <STRONG>wget_nwstr</STRONG> can be in- |
| terpreted either way. This implementation counts the terminator in the |
| length. |
| |
| X/Open Curses does not specify what happens if the length <EM>n</EM> is nega- |
| tive. |
| |
| <STRONG>o</STRONG> For analogy with <STRONG>wgetnstr</STRONG>, ncurses 6.2 uses a limit (based on |
| <STRONG>LINE_MAX</STRONG>). |
| |
| <STRONG>o</STRONG> Some other implementations (such as Solaris xcurses) do the same, |
| while others (PDCurses) do not allow this. |
| |
| <STRONG>o</STRONG> NetBSD 7 curses imitates ncurses 6.1 in this regard, treating a <STRONG>-1</STRONG> |
| as an indefinite number of characters. |
| |
| |
| </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE> |
| Functions: <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_get_wch.3x.html">curs_get_wch(3x)</A></STRONG>, <STRONG><A HREF="curs_getstr.3x.html">curs_getstr(3x)</A></STRONG>. |
| |
| |
| |
| <STRONG><A HREF="curs_get_wstr.3x.html">curs_get_wstr(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-NOTES">NOTES</a></li> |
| <li><a href="#h2-RETURN-VALUE">RETURN VALUE</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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