refactor mrb_hash_shift, num_pow, flo_eq, flo_finite_p method

src/hash.c

@@ -553,8 +553,7 @@ mrb_hash_shift(mrb_state *mrb, mrb_value hash)
   mrb_value delKey, delVal;
 
   mrb_hash_modify(mrb, hash);
-  if (h) {
-    if (kh_size(h) > 0) {
+  if (h && kh_size(h) > 0) {
     for (k = kh_begin(h); k != kh_end(h); k++) {
       if (!kh_exist(h,k)) continue;
 
@@ -566,7 +565,6 @@ mrb_hash_shift(mrb_state *mrb, mrb_value hash)
       return mrb_assoc_new(mrb, delKey, delVal);
     }
   }
-  }
 
   if (MRB_RHASH_PROCDEFAULT_P(hash)) {
     return mrb_funcall(mrb, RHASH_PROCDEFAULT(hash), "call", 2, hash, mrb_nil_value());

src/numeric.c

@@ -54,13 +54,11 @@ static mrb_value
 num_pow(mrb_state *mrb, mrb_value x)
 {
   mrb_value y;
-  mrb_bool both_int = FALSE;
   mrb_float d;
 
   mrb_get_args(mrb, "o", &y);
-  if (mrb_fixnum_p(x) && mrb_fixnum_p(y)) both_int = TRUE;
   d = pow(mrb_to_flo(mrb, x), mrb_to_flo(mrb, y));
-  if (both_int && FIXABLE(d))
+  if (mrb_fixnum_p(x) && mrb_fixnum_p(y) && FIXABLE(d))
     return mrb_fixnum_value((mrb_int)d);
   return mrb_float_value(mrb, d);
 }
@@ -397,22 +395,16 @@ static mrb_value
 flo_eq(mrb_state *mrb, mrb_value x)
 {
   mrb_value y;
-  volatile mrb_float a, b;
-
   mrb_get_args(mrb, "o", &y);
 
   switch (mrb_type(y)) {
   case MRB_TT_FIXNUM:
-    b = (mrb_float)mrb_fixnum(y);
-    break;
+    return mrb_bool_value(mrb_float(x) == (mrb_float)mrb_fixnum(y));    
   case MRB_TT_FLOAT:
-    b = mrb_float(y);
-    break;
+    return mrb_bool_value(mrb_float(x) == (mrb_float)mrb_float(y));
   default:
     return mrb_false_value();
   }
-  a = mrb_float(x);
-  return mrb_bool_value(a == b);
 }
 
 /* 15.2.8.3.18 */
@@ -493,9 +485,7 @@ flo_infinite_p(mrb_state *mrb, mrb_value num)
 static mrb_value
 flo_finite_p(mrb_state *mrb, mrb_value num)
 {
-  mrb_float value = mrb_float(num);
-
-  return mrb_bool_value(isfinite(value));
+  return mrb_bool_value(isfinite(mrb_float(num)));
 }
 
 /* 15.2.9.3.10 */