From 770ddcdfe069f8654a07e0fcc758aea591cdd17d Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 24 Apr 2012 03:46:55 +0000
Subject: * hash.c, object.c, struct.c, lib/ostruct.rb: add to_h methods.  
 [Feature #6276]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35452 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 struct.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'struct.c')

diff --git a/struct.c b/struct.c
index 7fa50f14ee..e958a78df8 100644
--- a/struct.c
+++ b/struct.c
@@ -586,6 +586,31 @@ rb_struct_to_a(VALUE s)
     return rb_ary_new4(RSTRUCT_LEN(s), RSTRUCT_PTR(s));
 }
 
+/*
+ *  call-seq:
+ *     struct.to_h     -> hash
+ *
+ *  Returns the values for this instance as a hash with keys
+ *  corresponding to the instance variable name.
+ *
+ *     Customer = Struct.new(:name, :address, :zip)
+ *     joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
+ *     joe.to_h[:address]   #=> "123 Maple, Anytown NC"
+ */
+
+static VALUE
+rb_struct_to_h(VALUE s)
+{
+    VALUE h = rb_hash_new();
+    VALUE members = rb_struct_members(s);
+    long i;
+
+    for (i=0; i<RSTRUCT_LEN(s); i++) {
+	rb_hash_aset(h, rb_ary_entry(members, i), RSTRUCT_PTR(s)[i]);
+    }
+    return h;
+}
+
 /* :nodoc: */
 VALUE
 rb_struct_init_copy(VALUE copy, VALUE s)
@@ -961,6 +986,7 @@ Init_Struct(void)
     rb_define_method(rb_cStruct, "inspect", rb_struct_inspect, 0);
     rb_define_alias(rb_cStruct,  "to_s", "inspect");
     rb_define_method(rb_cStruct, "to_a", rb_struct_to_a, 0);
+    rb_define_method(rb_cStruct, "to_h", rb_struct_to_h, 0);
     rb_define_method(rb_cStruct, "values", rb_struct_to_a, 0);
     rb_define_method(rb_cStruct, "size", rb_struct_size, 0);
     rb_define_method(rb_cStruct, "length", rb_struct_size, 0);
-- 
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