+/****************************************************************************
+ *
+ * Alternate character-set stuff
+ *
+ ****************************************************************************/
+/* *INDENT-OFF* */
+static struct {
+ chtype attr;
+ const char *name;
+} attrs_to_cycle[] = {
+ { A_NORMAL, "normal" },
+ { A_BOLD, "bold" },
+ { A_BLINK, "blink" },
+ { A_REVERSE, "reverse" },
+ { A_UNDERLINE, "underline" },
+};
+/* *INDENT-ON* */
+
+static bool
+cycle_attr(int ch, unsigned *at_code, chtype *attr)
+{
+ bool result = TRUE;
+
+ switch (ch) {
+ case 'v':
+ if ((*at_code += 1) >= SIZEOF(attrs_to_cycle))
+ *at_code = 0;
+ break;
+ case 'V':
+ if (*at_code == 0)
+ *at_code = SIZEOF(attrs_to_cycle) - 1;
+ else
+ *at_code -= 1;
+ break;
+ default:
+ result = FALSE;
+ break;
+ }
+ if (result)
+ *attr = attrs_to_cycle[*at_code].attr;
+ return result;
+}
+
+static bool
+cycle_colors(int ch, int *fg, int *bg, short *pair)
+{
+ bool result = FALSE;
+
+ if (use_colors) {
+ result = TRUE;
+ switch (ch) {
+ case 'F':
+ if ((*fg -= 1) < 0)
+ *fg = COLORS - 1;
+ break;
+ case 'f':
+ if ((*fg += 1) >= COLORS)
+ *fg = 0;
+ break;
+ case 'B':
+ if ((*bg -= 1) < 0)
+ *bg = COLORS - 1;
+ break;
+ case 'b':
+ if ((*bg += 1) >= COLORS)
+ *bg = 0;
+ break;
+ default:
+ result = FALSE;
+ break;
+ }
+ if (result) {
+ *pair = (short) (*fg != COLOR_BLACK || *bg != COLOR_BLACK);
+ if (*pair != 0) {
+ *pair = 1;
+ if (init_pair(*pair, (short) *fg, (short) *bg) == ERR) {
+ result = FALSE;
+ }
+ }
+ }
+ }
+ return result;
+}
+