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- * @Id: curs_addstr.3x,v 1.18 2017/11/18 23:56:00 tom Exp @
+ * @Id: curs_addstr.3x,v 1.22 2020/03/22 00:06:42 tom Exp @
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</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
These functions write the (null-terminated) character string <EM>str</EM> on the
- given window. It is similar to calling <STRONG>waddch</STRONG> once for each character
- in the string.
+ given window. It is similar to calling <STRONG>waddch</STRONG> once for each byte in
+ the string.
The <EM>mv</EM> functions perform cursor movement once, before writing any char-
acters. Thereafter, the cursor is advanced as a side-effect of writing
to the window.
- The four functions with <EM>n</EM> as the last argument write at most <EM>n</EM> charac-
- ters, or until a terminating null is reached. If <EM>n</EM> is -1, then the en-
- tire string will be added.
+ The four functions with <EM>n</EM> as the last argument write at most <EM>n</EM> bytes,
+ or until a terminating null is reached. If <EM>n</EM> is -1, then the entire
+ string will be added.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
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.
+ the window pointer is null. If an error is returned by the <STRONG>wmove</STRONG>, no
+ characters are added to the window.
+
+ If an error is returned by <STRONG>waddch</STRONG> (e.g., because the window is not
+ large enough, or an illegal byte sequence was detected) only part of
+ the string may be added. Aside from that, there is a special case in
+ <STRONG>waddch</STRONG> where an error may be returned after successfully writing a
+ character to the lower-right corner of a window when <STRONG>scrollok</STRONG> is dis-
+ abled.
</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
projects / ncurses.git / blobdiff