From f9a5335ed4f84e6e3ed23cb92966a36101d9d149 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 10 Jun 2014 01:57:10 +0000
Subject: csv.rb: honor encoding option

* lib/csv.rb (CSV#<<): honor explicity given encoding.  based on
  the patch by DAISUKE TANIWAKI <daisuketaniwaki AT gmail.com> at
  [ruby-core:62113].  [Bug #9766]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46391 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/csv.rb | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

(limited to 'lib/csv.rb')

diff --git a/lib/csv.rb b/lib/csv.rb
index e1199185f9..60b22e76ba 100644
--- a/lib/csv.rb
+++ b/lib/csv.rb
@@ -1148,9 +1148,9 @@ class CSV
       io.seek(0, IO::SEEK_END)
       args.unshift(io)
     else
-      encoding = (args[-1] = args[-1].dup).delete(:encoding) if args.last.is_a?(Hash)
+      encoding = args[-1][:encoding] if args.last.is_a?(Hash)
       str      = ""
-      str.encode!(encoding) if encoding
+      str.force_encoding(encoding) if encoding
       args.unshift(str)
     end
     csv = new(*args)  # wrap
@@ -1524,7 +1524,7 @@ class CSV
     init_headers(options)
     init_comments(options)
 
-    options.delete(:encoding)
+    @force_encoding = !!(encoding || options.delete(:encoding))
     options.delete(:internal_encoding)
     options.delete(:external_encoding)
     unless options.empty?
@@ -1664,10 +1664,13 @@ class CSV
 
     output = row.map(&@quote).join(@col_sep) + @row_sep  # quote and separate
     if @io.is_a?(StringIO)             and
-       output.encoding != raw_encoding and
-       (compatible_encoding = Encoding.compatible?(@io.string, output))
-      @io.set_encoding(compatible_encoding)
-      @io.seek(0, IO::SEEK_END)
+       output.encoding != (encoding = raw_encoding)
+      if @force_encoding
+        output = output.encode(encoding)
+      elsif (compatible_encoding = Encoding.compatible?(@io.string, output))
+        @io.set_encoding(compatible_encoding)
+        @io.seek(0, IO::SEEK_END)
+      end
     end
     @io << output
 
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