+static int CYConsoleLineEnd(int count, int key) {
+ while (rl_point != rl_end && rl_line_buffer[rl_point] != '\n')
+ ++rl_point;
+ if (rl_point != rl_end && rl_editing_mode == 0)
+ --rl_point;
+ return 0;
+}
+
+static int CYConsoleKeyBack(int count, int key) {
+ for (; count != 0; --count) {
+ if (rl_point == 0)
+ return 1;
+
+ char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
+ if (before == NULL) {
+ int adjust(std::min(count, rl_point));
+ _lblcall(&rl_rubout, adjust, key);
+ count -= adjust - 1;
+ continue;
+ }
+
+ int start(before + 1 - rl_line_buffer);
+ if (start == rl_point) rubout: {
+ _lblcall(&rl_rubout, 1, key);
+ continue;
+ }
+
+ for (int i(start); i != rl_point; ++i)
+ if (rl_line_buffer[i] != ' ')
+ goto rubout;
+ _lblcall(&rl_rubout, (rl_point - start) % 4 ?: 4, key);
+ }
+
+ return 0;
+}
+
+static int CYConsoleKeyTab(int count, int key) {
+ char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
+ if (before == NULL) complete:
+ return rl_complete_internal(rl_completion_mode(&CYConsoleKeyTab));
+ int start(before + 1 - rl_line_buffer);
+ for (int i(start); i != rl_point; ++i)
+ if (rl_line_buffer[i] != ' ')
+ goto complete;
+ _lblcall(&rl_insert, 4 - (rl_point - start) % 4, ' ');