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curs_addwch(S)


curs_addwch: addwch, waddwch, mvaddwch, mvwaddwch, echowchar, wechowchar -- add a wchar_t character (with attributes) to a curses window and advance cursor

Syntax

cc ... -lcurses

#include <curses.h>

int addwch(chtype wch); int waddwch(WINDOW *win, chtype wch); int mvaddwch(int y, int x, chtype wch); int mvwaddwch(WINDOW *win, int y, int x, chtype wch); int echowchar(chtype wch); int wechowchar(WINDOW *win, chtype wch);

Description

The addwch(S), waddwch(S), mvaddwch(S), and mvwaddwch(S) routines put the character wch, holding a wchar_t character, into the window at the current cursor position of the window and advance the position of the window cursor. Their function is like that of putwchar(S) in the C multibyte library. At the right margin, an automatic newline is done. At the bottom of the scrolling region, if scrollok(S) is enabled, the scrolling region is scrolled up one line.

If wch is a tab, newline, or backspace, the cursor is moved appropriately within the window. A newline also does a clrtoeol(S) before moving. Tabs are considered to be at every eighth column. If wch is another control character, it is drawn in the ^X notation. Calling winwch(S) after adding a control character does not return the control character, but instead returns the representation of the control character.

Video attributes can be combined with a wchar_t character by ORing them into the parameter. This results in these attributes also being set. (The intent here is that text, including attributes, can be copied from one place to another using inwch(S) and addwch( ).) (see standout(S), predefined video attribute constants, on the curs_attr(S) page).

The routines echowchar(S) and wechowchar(S) are functionally equivalent to a call to addwch( ) followed by a call to refresh(S), or a call to waddwch( ) followed by a call to wrefresh(S). The knowledge that only a single character is being output is taken into consideration and, for non-control characters, a considerable performance gain might be seen by using these routines instead of their equivalents.

Line graphics

You can use the following variables to add line drawing characters to the screen using routines of the addwch( ) family. When variables are defined for the terminal, the A_ALTCHARSET bit is turned on (see curs_attr(S)). Otherwise, the default character listed below is stored in the variable. The names chosen are consistent with VT100 nomenclature.

Name Default Glyph Description
ACS_ULCORNER + upper left-hand corner
ACS_LLCORNER + lower left-hand corner
ACS_URCORNER + upper right-hand corner
ACS_LRCORNER + lower right-hand corner
ACS_TTEE + top tee
ACS_RTEE + right tee
ACS_LTEE + left tee
ACS_BTEE + bottom tee
ACS_HLINE - horizontal line
ACS_VLINE | vertical line
ACS_PLUS + plus
ACS_S1 - scan line 1
ACS_S9 _ scan line 9
ACS_DIAMOND + diamond
ACS_CKBOARD : checker board (stipple)
ACS_DEGREE ' degree symbol
ACS_PLMINUS # plus/minus
ACS_BULLET o bullet
ACS_LARROW < arrow pointing left
ACS_RARROW > arrow pointing right
ACS_DARROW v arrow pointing down
ACS_UARROW [^] arrow pointing up
ACS_BOARD # board of squares
ACS_LANTERN # lantern symbol
ACS_BLOCK # solid square block

 +-------------+----------+---------------------------+
 |Name         | Default  |  Glyph Description        |
 +-------------+----------+---------------------------+
 |ACS_ULCORNER |    +     |  upper left-hand corner   |
 +-------------+----------+---------------------------+
 |ACS_LLCORNER |    +     |  lower left-hand corner   |
 +-------------+----------+---------------------------+
 |ACS_URCORNER |    +     |  upper right-hand corner  |
 +-------------+----------+---------------------------+
 |ACS_LRCORNER |    +     |  lower right-hand corner  |
 +-------------+----------+---------------------------+
 |ACS_TTEE     |    +     |  top tee                  |
 +-------------+----------+---------------------------+
 |ACS_RTEE     |    +     |  right tee                |
 +-------------+----------+---------------------------+
 |ACS_LTEE     |    +     |  left tee                 |
 +-------------+----------+---------------------------+
 |ACS_BTEE     |    +     |  bottom tee               |
 +-------------+----------+---------------------------+
 |ACS_HLINE    |    -     |  horizontal line          |
 +-------------+----------+---------------------------+
 |ACS_VLINE    |    |     |  vertical line            |
 +-------------+----------+---------------------------+
 |ACS_PLUS     |    +     |  plus                     |
 +-------------+----------+---------------------------+
 |ACS_S1       |    -     |  scan line 1              |
 +-------------+----------+---------------------------+
 |ACS_S9       |    _     |  scan line 9              |
 +-------------+----------+---------------------------+
 |ACS_DIAMOND  |    +     |  diamond                  |
 +-------------+----------+---------------------------+
 |ACS_CKBOARD  |    :     |  checker board (stipple)  |
 +-------------+----------+---------------------------+
 |ACS_DEGREE   |    '     |  degree symbol            |
 +-------------+----------+---------------------------+
 |ACS_PLMINUS  |    #     |  plus/minus               |
 +-------------+----------+---------------------------+
 |ACS_BULLET   |    o     |  bullet                   |
 +-------------+----------+---------------------------+
 |ACS_LARROW   |    <     |  arrow pointing left      |
 +-------------+----------+---------------------------+
 |ACS_RARROW   |    >     |  arrow pointing right     |
 +-------------+----------+---------------------------+
 |ACS_DARROW   |    v     |  arrow pointing down      |
 +-------------+----------+---------------------------+
 |ACS_UARROW   |    ^     |  arrow pointing up        |
 +-------------+----------+---------------------------+
 |ACS_BOARD    |    #     |  board of squares         |
 +-------------+----------+---------------------------+
 |ACS_LANTERN  |    #     |  lantern symbol           |
 +-------------+----------+---------------------------+
 |ACS_BLOCK    |    #     |  solid square block       |
 +-------------+----------+---------------------------+

Return values

All routines return the integer ERR on failure and an integer value other than ERR on successful completion, unless otherwise noted in the preceding routine descriptions.

Warning

The header file curses.h automatically includes the header files stdio.h and unctrl.h.

The following can be macros: addwch( ), mvaddwch( ), mvwaddwch( ), and echowchar( ).

Files


/usr/lib/libcurses.a
the library

See also

curses(S), curs_attr(S), curs_clear(S), curs_inch(S), curs_outopts(S), curs_refresh(S), putwc(S)

Standards conformance

addwch(S), waddwch(S), mvaddwch(S), mvwaddwch(S), echowchar(S), and wechowchar(S) are not part of any currently supported standard; they were developed by UNIX System Laboratories, Inc. and are maintained by The SCO Group.
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003