+#if NCURSES_EXT_FUNCS
+ /*
+ * Linux console "supports" the "PC ROM" character set by the coincidence
+ * that smpch/rmpch and smacs/rmacs have the same values. ncurses has
+ * no codepage support (see SCO Merge for an example). Outside of the
+ * values defined in acsc, there are no definitions for the "PC ROM"
+ * character set (assumed by some applications to be codepage 437), but we
+ * allow those applications to use those codepoints.
+ *
+ * test/blue.c uses this feature.
+ */
+#define PCH_KLUDGE(a,b) (a != 0 && b != 0 && !strcmp(a,b))
+ if (PCH_KLUDGE(enter_pc_charset_mode, enter_alt_charset_mode) &&
+ PCH_KLUDGE(exit_pc_charset_mode, exit_alt_charset_mode)) {
+ size_t i;
+ for (i = 1; i < ACS_LEN; ++i) {
+ if (real_map[i] == 0) {
+ real_map[i] = i;
+ if (real_map != fake_map) {
+ if (SP != 0)
+ SP->_screen_acs_map[i] = TRUE;
+ }
+ }
+ }
+ }
+#endif