Update `presym_find` to use more efficient binary search.
MODIFY
src/symbol.c
src/symbol.c
@@ -26,13 +26,20 @@ static const char *presym_table[] = {
static mrb_sym
presym_find(const char *name)
{
- /* use linear search for now */
- /* binary search should work better */
- int i;
+ int start = 0;
+ int end = MRB_PRESYM_MAX-1;
+
+ while (start<=end) {
+ int mid = (start+end)/2;
+ int cmp = strcmp(name, presym_table[mid]);
- for (i=0; presym_table[i]; i++) {
- if (strcmp(presym_table[i], name)==0)
- return i+1;
+ if (cmp == 0) {
+ return mid+1;
+ } else if (cmp < 0) {
+ end = mid-1;
+ } else {
+ start = mid+1;
+ }
}
return 0;
}

Update `presym_find` to use more efficient binary search.