move KHASH_DECLARE(ht..) to mruby/hash.h; close #3073

Author: matz

include/mruby/hash.h

@@ -8,6 +8,7 @@
 #define MRUBY_HASH_H
 
 #include "common.h"
+#include <mruby/khash.h>
 
 /**
  * Hash class
@@ -59,6 +60,15 @@ MRB_API mrb_value mrb_hash_empty_p(mrb_state *mrb, mrb_value self);
  */
 MRB_API mrb_value mrb_hash_clear(mrb_state *mrb, mrb_value hash);
 
+/* declaration of struct kh_ht */
+/* be careful when you touch the internal */
+typedef struct {
+  mrb_value v;
+  mrb_int n;
+} mrb_hash_value;
+
+KHASH_DECLARE(ht, mrb_value, mrb_hash_value, TRUE)
+
 /* RHASH_TBL allocates st_table if not available. */
 #define RHASH(obj)   ((struct RHash*)(mrb_ptr(obj)))
 #define RHASH_TBL(h)          (RHASH(h)->ht)

src/hash.c

@@ -91,12 +91,6 @@ mrb_hash_ht_hash_equal(mrb_state *mrb, mrb_value a, mrb_value b)
   }
 }
 
-typedef struct {
-  mrb_value v;
-  mrb_int n;
-} mrb_hash_value;
-
-KHASH_DECLARE(ht, mrb_value, mrb_hash_value, TRUE)
 KHASH_DEFINE (ht, mrb_value, mrb_hash_value, TRUE, mrb_hash_ht_hash_func, mrb_hash_ht_hash_equal)
 
 static void mrb_hash_modify(mrb_state *mrb, mrb_value hash);