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curs_addch(3) Library Functions Manual curs_addch(3) NAME curs_addch, addch, waddch, mvaddch, mvwaddch, echochar, wechochar - Add a character (with attributes) to a Curses window and advance the cursor LIBRARY Curses Library (libcurses.a, libcurses.so) SYNOPSIS #include <curses.h> int addch(const chtype ch); int waddch(WINDOW *win, const chtype ch); int mvaddch(int y, int x, const chtype ch); int mvwaddch(WINDOW *win, int y, int x, const chtype ch); int echochar(const chtype ch); int we- chochar(WINDOW *win, const chtype ch); STANDARDS Interfaces documented on this reference page conform to industry stan- dards as follows: addch, waddch, mvaddch, mvwaddch: XPG4, XPG4-UNIX echochar, wechochar: XPG4-UNIX Refer to the standards(5) reference page for more information about in- dustry standards and associated tags. DESCRIPTION The addch, waddch, mvaddch, and mvwaddch routines put the character ch into the window at the current cursor position of the window and ad- vance the position of the window cursor. Their function is similar to that of the putchar function. At the right margin, an automatic new- line is performed. At the bottom of the scrolling region, if scrollok is enabled, the scrolling region is scrolled up one line. If ch is a tab, newline, or backspace, these functions move the cursor appropriately within the window. A newline also performs clrtoeol be- fore moving. Tabs are considered to be at every eighth column. If ch is another control character, it is drawn in the ^X notation. Calling winch after adding a control character does not return the con- trol character, but instead returns the representation of the control character. Video attributes can be combined with a character in a parameter through an inclusive OR operation. This operation also sets these at- tributes. (The intent here is to allow text, including attributes, to be copied from one place to another by using inch and addch. See the discussion on standout, predefined video attribute constants, in the curs_attr(3) reference page.) The echochar and wechochar routines are functionally equivalent to a call to addch followed by a call to refresh, or a call to waddch fol- lowed by a call to wrefresh. The knowledge that only a single charac- ter is being output is taken into consideration and, for non-control characters, a considerable performance gain may be realized by using these routines instead of their equivalents. Line Graphics The following variables may be used with routines of the addch family to add line-drawing characters to the screen. When variables are de- fined for the terminal, the A_ALTCHARSET bit is turned on (see curs_attr(3)). Otherwise, the default character specified in the fol- lowing list is stored in the variable. The names chosen for variables are consistent with the VT100 nomenclature. tab(@); lfHB cfHB lfHBw(2.0i) l l lw(2.0i). _ 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_RTEE@+@right tee (-|) ACS_LTEE@+@left tee (-) ACS_BTEE@+@bottom tee (|) _ ACS_TTEE@+@top 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 _ NOTES The header file curses.h automatically includes the header file stdio.h. Note that addch, mvaddch, mvwaddch, and echochar may be macros. RETURN VALUES All routines return the integer ERR upon failure and OK upon successful completion. RELATED INFORMATION Functions: curses(3), curs_attr(3), curs_clear(3), curs_inch(3), curs_outopts(3), curs_refresh(3), putc(3) Others: standards(5) delim off curs_addch(3)