From c71019f8887f3f524f5ef3c0a7491ff14bef0b16 Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 21 Apr 2014 10:14:46 +0000
Subject: [PATCH] * ext/-test-/string/coderange.c: add
 Bug::String.new#coderange_scan   to explicitly scan coderange.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45649 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog                           |  5 +++
 ext/-test-/string/coderange.c       | 21 +++++++++-
 test/-ext-/string/test_coderange.rb | 59 +++++++++++++++++++++++++++++
 3 files changed, 83 insertions(+), 2 deletions(-)
 create mode 100644 test/-ext-/string/test_coderange.rb

diff --git a/ChangeLog b/ChangeLog
index cafd1e708d..82290f35ec 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Apr 21 18:55:21 2014  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* ext/-test-/string/coderange.c: add Bug::String.new#coderange_scan
+	  to explicitly scan coderange.
+
 Mon Apr 21 18:19:35 2014  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* string.c (coderange_scan): remove unused logic.
diff --git a/ext/-test-/string/coderange.c b/ext/-test-/string/coderange.c
index 2f1e6a06a8..b93172d72d 100644
--- a/ext/-test-/string/coderange.c
+++ b/ext/-test-/string/coderange.c
@@ -2,10 +2,11 @@
 #include "ruby/encoding.h"
 
 static VALUE sym_7bit, sym_valid, sym_unknown, sym_broken;
+
 static VALUE
-str_coderange(VALUE str)
+coderange_int2sym(int coderange)
 {
-    switch (ENC_CODERANGE(str)) {
+    switch (coderange) {
       case ENC_CODERANGE_7BIT:
 	return sym_7bit;
       case ENC_CODERANGE_VALID:
@@ -19,6 +20,21 @@ str_coderange(VALUE str)
     UNREACHABLE;
 }
 
+/* return coderange without scan */
+static VALUE
+str_coderange(VALUE str)
+{
+    return coderange_int2sym(ENC_CODERANGE(str));
+}
+
+/* scan coderange and return the result */
+static VALUE
+str_coderange_scan(VALUE str)
+{
+    ENC_CODERANGE_SET(str, ENC_CODERANGE_UNKNOWN);
+    return coderange_int2sym(rb_enc_str_coderange(str));
+}
+
 void
 Init_coderange(VALUE klass)
 {
@@ -27,4 +43,5 @@ Init_coderange(VALUE klass)
     sym_unknown = ID2SYM(rb_intern("unknown"));
     sym_broken = ID2SYM(rb_intern("broken"));
     rb_define_method(klass, "coderange", str_coderange, 0);
+    rb_define_method(klass, "coderange_scan", str_coderange_scan, 0);
 }
diff --git a/test/-ext-/string/test_coderange.rb b/test/-ext-/string/test_coderange.rb
new file mode 100644
index 0000000000..83cebf19c0
--- /dev/null
+++ b/test/-ext-/string/test_coderange.rb
@@ -0,0 +1,59 @@
+# coding: ascii-8bit
+require 'test/unit'
+require "-test-/string/string"
+require "rbconfig/sizeof"
+
+class Test_StringCoderange < Test::Unit::TestCase
+  def setup
+    @sizeof_voidp = RbConfig::SIZEOF["void*"]
+    @a8 = Encoding::ASCII_8BIT
+    @a7 = Encoding::US_ASCII
+    @u8 = Encoding::UTF_8
+  end
+
+  def test_ascii8bit
+    enc = @a8
+    str = "a"
+    str.force_encoding(enc)
+    assert_equal :"7bit", Bug::String.new(str).coderange_scan
+
+    str = "a\xBE".force_encoding(enc)
+    assert_equal :valid, Bug::String.new(str).coderange_scan
+  end
+
+  def test_usascii
+    enc = @a7
+    str = "a"
+    str.force_encoding(enc)
+    assert_equal :"7bit", Bug::String.new(str).coderange_scan
+
+    str = "a" * (@sizeof_voidp * 2)
+    str << "\xBE"
+    str.force_encoding(enc)
+    assert_equal :broken, Bug::String.new(str).coderange_scan
+  end
+
+  def test_utf8
+    enc = @u8
+    str = "a"
+    str.force_encoding(enc)
+    assert_equal :"7bit", Bug::String.new(str).coderange_scan
+
+    str = "a" * (@sizeof_voidp * 3)
+    str << "aa\xC2\x80"
+    str.force_encoding(enc)
+    assert_equal :valid, Bug::String.new(str).coderange_scan
+
+    str = "a" * (@sizeof_voidp * 2)
+    str << "\xC2\x80"
+    str << "a" * (@sizeof_voidp * 2)
+    str.force_encoding(enc)
+    assert_equal :valid, Bug::String.new(str).coderange_scan
+
+    str = "a" * (@sizeof_voidp * 2)
+    str << "\xC1\x80"
+    str << "a" * (@sizeof_voidp * 2)
+    str.force_encoding(enc)
+    assert_equal :broken, Bug::String.new(str).coderange_scan
+  end
+end