avoid crash from writing to a string literal

fangq · Apr 10, 2015 · b3484d2 · b3484d2
1 parent 1d9883a
commit b3484d2
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/mmc/trunk/src/mcx_utils.c b/mmc/trunk/src/mcx_utils.c
@@ -599,7 +599,8 @@ int mcx_lookupindex(char *key, const char *index){
 int mcx_keylookup(char *key, const char *table[]){
     int i=0;
     while(key[i]){
-        key[i]=tolower(key[i]);
+        if(key[i]>='A' && key[i]<='Z')
+		key[i]+=('a'-'A');
 	i++;
     }
     i=0;