The addch, waddch, mvaddch and mvwaddch routines put the
character ch into the given window at its current window
position, which is then advanced. They are analogous to
- putchar in stdio(3). If the advance is at the right mar-
- gin, the cursor automatically wraps to the beginning of
- the next line. At the bottom of the current scrolling
- region, if scrollok is enabled, the scrolling region is
- scrolled up one line.
-
- If ch is a tab, newline, or backspace, the cursor is moved
- appropriately within the window. Backspace moves the cur-
- sor one character left; at the left edge of a window it
- does nothing. Newline does a clrtoeol, then moves the
- cursor to the window left margin on the next line,
- scrolling the window if on the last line. Tabs are con-
- sidered to be at every eighth column. The tab interval
- may be altered by setting the TABSIZE variable.
-
- If ch is any control character other than tab, newline, or
- backspace, it is drawn in ^X notation. Calling winch
- after adding a control character does not return the char-
- acter itself, but instead returns the ^-representation of
- the control character.
+ putchar in stdio(3). If the advance is at the right mar-
+ gin:
+
+ o The cursor automatically wraps to the beginning of the
+ next line.
+
+ o At the bottom of the current scrolling region, and if
+ scrollok is enabled, the scrolling region is scrolled
+ up one line.
+
+ o If scrollok is not enabled, writing a character at the
+ lower right margin succeeds. However, an error is
+ returned because it is not possible to wrap to a new
+ line
+
+ If ch is a tab, newline, carriage return or backspace, the
+ cursor is moved appropriately within the window:
+
+ o Backspace moves the cursor one character left; at the
+ left edge of a window it does nothing.
+
+ o Carriage return moves the cursor to the window left
+ margin on the current line.
+
+ o Newline does a clrtoeol, then moves the cursor to the
+ window left margin on the next line, scrolling the
+ window if on the last line.
+
+ o Tabs are considered to be at every eighth column. The
+ tab interval may be altered by setting the TABSIZE
+ variable.
+
+ If ch is any other control character, it is drawn in ^X
+ notation. Calling winch after adding a control character
+ does not return the character itself, but instead returns
+ the ^-representation of the control character.
Video attributes can be combined with a character argument
passed to addch or related functions by logical-ORing them
@@ -107,7 +123,9 @@
may be seen by using these routines instead of their
equivalents.
- LineGraphics
+
+
The following variables may be used to add line drawing
characters to the screen with routines of the addch fam-
ily. The default character listed below is used if the
@@ -152,7 +170,7 @@
All routines return the integer ERR upon failure and OK on
success (the SVr4 manuals specify only "an integer value
other than ERR") upon successful completion, unless other-
@@ -164,13 +182,13 @@
All these functions are described in the XSI Curses stan-
dard, Issue 4. The defaults specified for forms-drawing
characters apply in the POSIX locale.
@@ -198,10 +216,10 @@