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-rw-r--r--robot/modes.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/robot/modes.c b/robot/modes.c
index a54bc43..d706c2f 100644
--- a/robot/modes.c
+++ b/robot/modes.c
@@ -30,8 +30,7 @@ void w2_modes_init() {
void w2_modes_main() { (*g_w2_modes[g_w2_mode_history[g_w2_mode_history_index]])(); }
void w2_modes_switch(w2_e_mode new_mode, bool replace) {
- int16_t next_history_index =
- g_w2_mode_history_index + (new_mode == W2_M_PREV ? -1 : 1) * (replace - 1);
+ int16_t next_history_index = g_w2_mode_history_index + (new_mode == W2_M_PREV ? -1 : 1) * !replace;
if (next_history_index == -1 || next_history_index == W2_MODE_HISTORY_BUFFER_SIZE - 1) {
next_history_index = W2_RANGE(0, next_history_index, W2_MODE_HISTORY_BUFFER_SIZE);
w2_errcatch_throw(W2_E_WARN_MODE_HISTORY_BUFFER_IOB);