+ for (i = 0; i < n && ChCharOf(astr[i]) != '\0'; ++i) {
+ SetChar2(line->text[i + x], astr[i]);
+ }
+ CHANGED_RANGE(line, x, (NCURSES_SIZE_T) (x + n - 1));
+
+ _nc_synchook(win);
+ returnCode(code);
+}
+
+#if USE_WIDEC_SUPPORT
+
+NCURSES_EXPORT(int)
+_nc_wchstrlen(const cchar_t *s)
+{
+ int result = 0;
+ if (s != 0) {
+ while (CharOf(s[result]) != L'\0') {
+ result++;
+ }
+ }
+ return result;
+}
+
+NCURSES_EXPORT(int)
+wadd_wchnstr(WINDOW *win, const cchar_t *astr, int n)
+{
+ static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
+ NCURSES_SIZE_T y;
+ NCURSES_SIZE_T x;
+ int code = OK;
+ struct ldat *line;
+ int i, j, start, len, end;
+
+ T((T_CALLED("wadd_wchnstr(%p,%s,%d)"),
+ (void *) win,
+ _nc_viscbuf(astr, n),
+ n));
+
+ if (!win)
+ returnCode(ERR);
+
+ y = win->_cury;
+ x = win->_curx;
+ if (n < 0) {
+ n = _nc_wchstrlen(astr);
+ }
+ if (n > win->_maxx - x + 1)
+ n = win->_maxx - x + 1;
+ if (n == 0)
+ returnCode(code);
+
+ line = &(win->_line[y]);
+ start = x;
+ end = x + n - 1;
+
+ /*
+ * Reset orphaned cells of multi-column characters that extend up to the
+ * new string's location to blanks.
+ */
+ if (x > 0 && isWidecExt(line->text[x])) {
+ for (i = 0; i <= x; ++i) {
+ if (!isWidecExt(line->text[x - i])) {
+ /* must be isWidecBase() */
+ start -= i;
+ while (i > 0) {
+ line->text[x - i--] = _nc_render(win, blank);
+ }
+ break;
+ }
+ }
+ }
+
+ /*
+ * Copy the new string to the window.
+ */
+ for (i = 0; i < n && CharOf(astr[i]) != L'\0' && x <= win->_maxx; ++i) {
+ if (isWidecExt(astr[i]))
+ continue;
+
+ len = wcwidth(CharOf(astr[i]));
+
+ if (x + len - 1 <= win->_maxx) {
+ line->text[x] = _nc_render(win, astr[i]);
+ if (len > 1) {
+ for (j = 0; j < len; ++j) {
+ if (j != 0) {
+ line->text[x + j] = line->text[x];
+ }
+ SetWidecExt(line->text[x + j], j);
+ }
+ } else {
+ len = 1;
+ }
+ x = (NCURSES_SIZE_T) (x + len);
+ end += len - 1;
+ } else {
+ break;
+ }
+ }
+
+ /*
+ * Set orphaned cells of multi-column characters which lie after the new
+ * string to blanks.
+ */
+ while (x <= win->_maxx && isWidecExt(line->text[x])) {
+ line->text[x] = _nc_render(win, blank);
+ ++end;
+ ++x;
+ }
+ CHANGED_RANGE(line, start, end);