* array.c (rb_ary_cat): new function to concat objects into array.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34948 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Fri Mar  9 00:25:02 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* array.c (rb_ary_cat): new function to concat objects into array.
+
 Thu Mar  8 16:44:02 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* .gdbinit (rb_numtable_entry): update for recent refactoring of

README.EXT

@@ -284,6 +284,9 @@ listed below:
   rb_ary_shift(VALUE ary)
   rb_ary_unshift(VALUE ary, VALUE val)
 
+  rb_ary_cat(VALUE ary, const VALUE *ptr, long len)
+
+    Appends len elements of objects from ptr to the array.
 
 2. Extending Ruby with C
 

README.EXT.ja

@@ -312,6 +312,10 @@ Rubyが用意している関数を用いてください．
   rb_ary_shift(VALUE ary)
   rb_ary_unshift(VALUE ary, VALUE val)
 
+  rb_ary_cat(VALUE ary, const VALUE *ptr, long len)
+
+    配列aryにptrからlen個のオブジェクトを追加する．
+
 2．Rubyの機能を使う
 
 原理的にRubyで書けることはCでも書けます．RubyそのものがCで記

array.c

@@ -755,6 +755,19 @@ rb_ary_push_1(VALUE ary, VALUE item)
     return ary;
 }
 
+VALUE
+rb_ary_cat(VALUE ary, const VALUE *ptr, long len)
+{
+    long oldlen;
+
+    rb_ary_modify(ary);
+    oldlen = RARRAY_LEN(ary);
+    ary_resize_capa(ary, oldlen + len);
+    MEMCPY(RARRAY_PTR(ary) + oldlen, ptr, VALUE, len);
+    ARY_SET_LEN(ary, oldlen + len);
+    return ary;
+}
+
 /*
  *  call-seq:
  *     ary.push(obj, ... )   -> ary
@@ -771,11 +784,7 @@ rb_ary_push_1(VALUE ary, VALUE item)
 static VALUE
 rb_ary_push_m(int argc, VALUE *argv, VALUE ary)
 {
-    rb_ary_modify(ary);
-    while (argc--) {
-	rb_ary_push_1(ary, *argv++);
-    }
-    return ary;
+    return rb_ary_cat(ary, argv, argc);
 }
 
 VALUE

internal.h

@@ -42,6 +42,7 @@ struct vtm; /* defined by timev.h */
 /* array.c */
 VALUE rb_ary_last(int, VALUE *, VALUE);
 void rb_ary_set_len(VALUE, long);
+VALUE rb_ary_cat(VALUE, const VALUE *, long);
 
 /* bignum.c */
 VALUE rb_big_fdiv(VALUE x, VALUE y);