Mercurial > hg > terminal-chess / file diff

--- a/src/chess/rules.c	Sat Jul 18 21:18:07 2026 +0200
+++ b/src/chess/rules.c	Sat Jul 18 21:18:38 2026 +0200
@@ -716,15 +716,17 @@
     }
 }
 
-static int eval_move1(char *mstr, Move *move, uint8_t color) {
+static int eval_move1(const char *pstr, Move *move, uint8_t color) {
     memset(move, 0, sizeof(Move));
     move->fromfile = POS_UNSPECIFIED;
     move->fromrow = POS_UNSPECIFIED;
 
-    size_t len = strlen(mstr);
+    size_t len = strlen(pstr);
     if (len < 1 || len > 6) {
         return INVALID_MOVE_SYNTAX;
     }
+    char mstr[8];
+    strcpy(mstr, pstr);
     
     /* evaluate check/checkmate flags */
     if (mstr[len-1] == '+' || mstr[len-1] == '#') {
@@ -844,7 +846,8 @@
     return VALID_MOVE_SYNTAX;
 }
 
-int eval_move(GameState *gamestate, char *mstr, Move *move, uint8_t color) {
+int eval_move(GameState *gamestate, const char *mstr,
+        Move *move, uint8_t color) {
     int result = eval_move1(mstr, move, color);
     if (result == VALID_MOVE_SYNTAX) {
         if (move->fromfile == POS_UNSPECIFIED
@@ -857,7 +860,7 @@
     return result;
 }
 
-int check_move(char *mstr, uint8_t color) {
+int check_move(const char *mstr, uint8_t color) {
     Move move;
     return eval_move1(mstr, &move, color);
 }