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* @Id: curs_add_wch.3x,v 1.16 2015/07/20 23:44:56 tom Exp @
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
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<HTML>
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<HEAD>
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<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
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<meta name="generator" content="Manpage converted by man2html - see http://invisible-island.net/scripts/readme.html#others_scripts">
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<TITLE>curs_add_wch 3x</TITLE>
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<link rev=made href="mailto:bug-ncurses@gnu.org">
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<BODY>
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<H1 class="no-header">curs_add_wch 3x</H1>
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<PRE>
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<STRONG><A HREF="curs_add_wch.3x.html">curs_add_wch(3x)</A></STRONG> <STRONG><A HREF="curs_add_wch.3x.html">curs_add_wch(3x)</A></STRONG>
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</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
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<STRONG>add_wch</STRONG>, <STRONG>wadd_wch</STRONG>, <STRONG>mvadd_wch</STRONG>, <STRONG>mvwadd_wch</STRONG>, <STRONG>echo_wchar</STRONG>,
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<STRONG>wecho_wchar</STRONG> - add a complex character and rendition to a
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<STRONG>curses</STRONG> window, then advance the cursor
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</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
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<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
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<STRONG>int</STRONG> <STRONG>add_wch(</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>wadd_wch(</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>mvadd_wch(</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>mvwadd_wch(</STRONG> <STRONG>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>cchar_t</STRONG>
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<STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>echo_wchar(</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>wecho_wchar(</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
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</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
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</PRE><H3><a name="h3-add_wch">add_wch</a></H3><PRE>
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The <STRONG>add_wch</STRONG>, <STRONG>wadd_wch</STRONG>, <STRONG>mvadd_wch</STRONG>, and <STRONG>mvwadd_wch</STRONG> functions
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put the complex character <EM>wch</EM> into the given window at its
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current position, which is then advanced. These functions
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perform wrapping and special-character processing as fol-
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lows:
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<STRONG>o</STRONG> If <EM>wch</EM> refers to a spacing character, then any previ-
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ous character at that location is removed. A new
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character specified by <EM>wch</EM> is placed at that location
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with rendition specified by <EM>wch</EM>. The cursor then
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advances to the next spacing character on the screen.
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<STRONG>o</STRONG> If <EM>wch</EM> refers to a non-spacing character, all previous
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characters at that location are preserved. The non-
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spacing characters of <EM>wch</EM> are added to the spacing
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complex character, and the rendition specified by <EM>wch</EM>
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is ignored.
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<STRONG>o</STRONG> If the character part of <EM>wch</EM> is a tab, newline,
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backspace or other control character, the window is
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updated and the cursor moves as if <STRONG>addch</STRONG> were called.
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</PRE><H3><a name="h3-echo_wchar">echo_wchar</a></H3><PRE>
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The <STRONG>echo_wchar</STRONG> function is functionally equivalent to a
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call to <STRONG>add_wch</STRONG> followed by a call to <STRONG>refresh</STRONG>. Similarly,
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the <STRONG>wecho_wchar</STRONG> is functionally equivalent to a call to
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<STRONG>wadd_wch</STRONG> followed by a call to <STRONG>wrefresh</STRONG>. The knowledge
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that only a single character is being output is taken into
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consideration and, for non-control characters, a consider-
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able performance gain might be seen by using the *<STRONG>echo</STRONG>*
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functions instead of their equivalents.
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</PRE><H3><a name="h3-Line-Graphics">Line Graphics</a></H3><PRE>
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Like <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>, <STRONG>addch_wch</STRONG> accepts symbols which make it
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simple to draw lines and other frequently used special
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characters. These symbols correspond to the same VT100
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line-drawing set as <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>.
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<EM>Name</EM> <EM>Unicode</EM> <EM>Default</EM> <EM>Description</EM>
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----------------------------------------------------------------
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WACS_BLOCK 0x25ae # solid square block
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WACS_BOARD 0x2592 # board of squares
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WACS_BTEE 0x2534 + bottom tee
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WACS_BULLET 0x00b7 o bullet
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WACS_CKBOARD 0x2592 : checker board (stipple)
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WACS_DARROW 0x2193 v arrow pointing down
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WACS_DEGREE 0x00b0 ' degree symbol
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WACS_DIAMOND 0x25c6 + diamond
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WACS_GEQUAL 0x2265 > greater-than-or-equal-to
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WACS_HLINE 0x2500 - horizontal line
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WACS_LANTERN 0x2603 # lantern symbol
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WACS_LARROW 0x2190 < arrow pointing left
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WACS_LEQUAL 0x2264 < less-than-or-equal-to
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WACS_LLCORNER 0x2514 + lower left-hand corner
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WACS_LRCORNER 0x2518 + lower right-hand corner
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WACS_LTEE 0x2524 + left tee
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WACS_NEQUAL 0x2260 ! not-equal
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WACS_PI 0x03c0 * greek pi
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WACS_PLMINUS 0x00b1 # plus/minus
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WACS_PLUS 0x253c + plus
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WACS_RARROW 0x2192 > arrow pointing right
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WACS_RTEE 0x251c + right tee
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WACS_S1 0x23ba - scan line 1
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WACS_S3 0x23bb - scan line 3
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WACS_S7 0x23bc - scan line 7
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WACS_S9 0x23bd _ scan line 9
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WACS_STERLING 0x00a3 f pound-sterling symbol
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WACS_TTEE 0x252c + top tee
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WACS_UARROW 0x2191 ^ arrow pointing up
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WACS_ULCORNER 0x250c + upper left-hand corner
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WACS_URCORNER 0x2510 + upper right-hand corner
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WACS_VLINE 0x2502 | vertical line
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The wide-character configuration of ncurses also defines
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symbols for thick- and double-lines:
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<EM>Name</EM> <EM>Unicode</EM> <EM>Default</EM> <EM>Description</EM>
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---------------------------------------------------------------------
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WACS_T_ULCORNER 0x250f + thick upper left corner
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WACS_T_LLCORNER 0x2517 + thick lower left corner
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WACS_T_URCORNER 0x2513 + thick upper right corner
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WACS_T_LRCORNER 0x251b + thick lower right corner
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WACS_T_LTEE 0x252b + thick tee pointing right
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WACS_T_RTEE 0x2523 + thick tee pointing left
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WACS_T_BTEE 0x253b + thick tee pointing up
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WACS_T_TTEE 0x2533 + thick tee pointing down
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WACS_T_HLINE 0x2501 - thick horizontal line
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WACS_T_VLINE 0x2503 | thick vertical line
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WACS_T_PLUS 0x254b + thick large plus or crossover
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WACS_D_ULCORNER 0x2554 + double upper left corner
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WACS_D_LLCORNER 0x255a + double lower left corner
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WACS_D_URCORNER 0x2557 + double upper right corner
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WACS_D_LRCORNER 0x255d + double lower right corner
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WACS_D_RTEE 0x2563 + double tee pointing left
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WACS_D_LTEE 0x2560 + double tee pointing right
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WACS_D_BTEE 0x2569 + double tee pointing up
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WACS_D_TTEE 0x2566 + double tee pointing down
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WACS_D_HLINE 0x2550 - double horizontal line
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WACS_D_VLINE 0x2551 | double vertical line
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WACS_D_PLUS 0x256c + double large plus or crossover
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</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
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All routines return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> on
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success.
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Functions with a "mv" prefix first perform a cursor move-
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ment using <STRONG>wmove</STRONG>, and return an error if the position is
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outside the window, or if the window pointer is null.
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</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
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Note that <STRONG>add_wch</STRONG>, <STRONG>mvadd_wch</STRONG>, <STRONG>mvwadd_wch</STRONG>, and <STRONG>echo_wchar</STRONG>
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may be macros.
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</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
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All of these functions are described in the XSI Curses
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standard, Issue 4. The defaults specified for line-draw-
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ing characters apply in the POSIX locale.
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X/Open Curses makes it clear that the WACS_ symbols should
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be defined as a pointer to <STRONG>cchar_t</STRONG> data, e.g., in the dis-
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cussion of <STRONG>border_set</STRONG>. A few implementations are problem-
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atic:
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<STRONG>o</STRONG> NetBSD curses defines the symbols as a <STRONG>wchar_t</STRONG> within
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a <STRONG>cchar_t</STRONG>.
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<STRONG>o</STRONG> HPUX curses equates some of the <EM>ACS</EM><STRONG>_</STRONG> symbols to the
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analogous <EM>WACS</EM><STRONG>_</STRONG> symbols as if the <EM>ACS</EM><STRONG>_</STRONG> symbols were
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wide characters. The misdefined symbols are the
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arrows and other symbols which are not used for line-
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drawing.
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X/Open Curses does not define symbols for thick- or dou-
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ble-lines. SVr4 curses implementations defined their
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line-drawing symbols in terms of intermediate symbols.
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This implementation extends those symbols, providing new
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definitions which are not in the SVr4 implementations.
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</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
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<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>, <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>, <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>,
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<STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>, <STRONG>putwc(3)</STRONG>
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<STRONG><A HREF="curs_add_wch.3x.html">curs_add_wch(3x)</A></STRONG>
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</PRE>
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<div class="nav">
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<ul>
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<li><a href="#h2-NAME">NAME</a></li>
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<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
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<li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
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<ul>
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<li><a href="#h3-add_wch">add_wch</a></li>
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<li><a href="#h3-echo_wchar">echo_wchar</a></li>
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<li><a href="#h3-Line-Graphics">Line Graphics</a></li>
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</ul>
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</li>
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<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
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<li><a href="#h2-NOTES">NOTES</a></li>
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<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
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<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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</ul>
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</div>
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