io.c: try to_io first

* io.c (copy_stream_body): try to_io conversion before read,
  readpartial, and write methods.  [ruby-dev:49008] [Bug #11199]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52750 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 56 insertions, 36 deletions

diff --git a/ChangeLog b/ChangeLog
index 25905864c6..1bcd54ee5c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Nov 25 21:23:39 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (copy_stream_body): try to_io conversion before read,
+	  readpartial, and write methods.  [ruby-dev:49008] [Bug #11199]
+
 Wed Nov 25 10:55:21 2015  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* io.c (argf_getpartial): should not resize str if the second
diff --git a/io.c b/io.c
index 9d75c230f4..9306b81d18 100644
--- a/io.c
+++ b/io.c
@@ -10573,54 +10573,57 @@ copy_stream_body(VALUE arg)
 
     stp->total = 0;
 
-    if (src_io == argf) {
-	src_fd = -1;
-    }
-    else if (RB_TYPE_P(src_io, T_FILE)) {
-	goto io_src;
-    }
-    else if (!RB_TYPE_P(src_io, T_STRING) &&
-	     (rb_respond_to(src_io, id_read) ||
-	      rb_respond_to(src_io, id_readpartial))) {
+    if (src_io == argf ||
+	!(RB_TYPE_P(src_io, T_FILE) ||
+	  RB_TYPE_P(src_io, T_STRING) ||
+	  rb_respond_to(src_io, rb_intern("to_path")))) {
 	src_fd = -1;
     }
     else {
-	VALUE args[2];
-	FilePathValue(src_io);
-	args[0] = src_io;
-	args[1] = INT2NUM(O_RDONLY|common_oflags);
-	src_io = rb_class_new_instance(2, args, rb_cFile);
-	stp->src = src_io;
-	stp->close_src = 1;
-      io_src:
+	VALUE tmp_io = rb_io_check_io(src_io);
+	if (!NIL_P(tmp_io)) {
+	    src_io = tmp_io;
+	}
+	else if (!RB_TYPE_P(src_io, T_FILE)) {
+	    VALUE args[2];
+	    FilePathValue(src_io);
+	    args[0] = src_io;
+	    args[1] = INT2NUM(O_RDONLY|common_oflags);
+	    src_io = rb_class_new_instance(2, args, rb_cFile);
+	    stp->src = src_io;
+	    stp->close_src = 1;
+	}
 	GetOpenFile(src_io, src_fptr);
 	rb_io_check_byte_readable(src_fptr);
 	src_fd = src_fptr->fd;
     }
     stp->src_fd = src_fd;
 
-    if (dst_io == argf) {
-	dst_fd = -1;
-    }
-    else if (RB_TYPE_P(dst_io, T_FILE)) {
-	dst_io = GetWriteIO(dst_io);
-	stp->dst = dst_io;
-	goto io_dst;
-    }
-    else if (!RB_TYPE_P(dst_io, T_STRING) &&
-	     rb_respond_to(dst_io, id_write)) {
+    if (dst_io == argf ||
+	!(RB_TYPE_P(dst_io, T_FILE) ||
+	  RB_TYPE_P(dst_io, T_STRING) ||
+	  rb_respond_to(dst_io, rb_intern("to_path")))) {
 	dst_fd = -1;
     }
     else {
-	VALUE args[3];
-	FilePathValue(dst_io);
-	args[0] = dst_io;
-	args[1] = INT2NUM(O_WRONLY|O_CREAT|O_TRUNC|common_oflags);
-	args[2] = INT2FIX(0666);
-	dst_io = rb_class_new_instance(3, args, rb_cFile);
-	stp->dst = dst_io;
-	stp->close_dst = 1;
-      io_dst:
+	VALUE tmp_io = rb_io_check_io(dst_io);
+	if (!NIL_P(tmp_io)) {
+	    dst_io = tmp_io;
+	}
+	else if (!RB_TYPE_P(dst_io, T_FILE)) {
+	    VALUE args[3];
+	    FilePathValue(dst_io);
+	    args[0] = dst_io;
+	    args[1] = INT2NUM(O_WRONLY|O_CREAT|O_TRUNC|common_oflags);
+	    args[2] = INT2FIX(0666);
+	    dst_io = rb_class_new_instance(3, args, rb_cFile);
+	    stp->dst = dst_io;
+	    stp->close_dst = 1;
+	}
+	else {
+	    dst_io = GetWriteIO(dst_io);
+	    stp->dst = dst_io;
+	}
 	GetOpenFile(dst_io, dst_fptr);
 	rb_io_check_writable(dst_fptr);
 	dst_fd = dst_fptr->fd;
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 12c4abdbe4..bb878ea148 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -3,6 +3,7 @@ require 'test/unit'
 require 'tmpdir'
 require "fcntl"
 require 'io/nonblock'
+require 'pathname'
 require 'socket'
 require 'stringio'
 require 'timeout'
@@ -888,6 +889,17 @@ class TestIO < Test::Unit::TestCase
     dst.close!
   end
 
+  def test_copy_stream_pathname_to_pathname
+    bug11199 = '[ruby-dev:49008] [Bug #11199]'
+    mkcdtmpdir {
+      File.open("src", "w") {|f| f << "ok" }
+      src = Pathname.new("src")
+      dst = Pathname.new("dst")
+      IO.copy_stream(src, dst)
+      assert_equal("ok", IO.read("dst"), bug11199)
+    }
+  end
+
   def test_copy_stream_write_in_binmode
     bug8767 = '[ruby-core:56518] [Bug #8767]'
     mkcdtmpdir {