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1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include <string.h>
6 
7 #include "base/android/jni_android.h"
8 #include "base/android/jni_string.h"
9 #include "base/strings/string16.h"
10 #include "base/strings/string_piece.h"
11 #include "jni/IDNStringUtil_jni.h"
12 #include "url/url_canon_internal.h"
13 
14 namespace url {
15 
16 // This uses the JDK's conversion function, which uses IDNA 2003, unlike the
17 // ICU implementation.
IDNToASCII(const base::char16 * src,int src_len,CanonOutputW * output)18 bool IDNToASCII(const base::char16* src, int src_len, CanonOutputW* output) {
19   DCHECK_EQ(0, output->length());  // Output buffer is assumed empty.
20 
21   JNIEnv* env = base::android::AttachCurrentThread();
22   base::android::ScopedJavaLocalRef<jstring> java_src =
23       base::android::ConvertUTF16ToJavaString(
24           env, base::StringPiece16(src, src_len));
25   ScopedJavaLocalRef<jstring> java_result =
26       android::Java_IDNStringUtil_idnToASCII(env, java_src.obj());
27   // NULL indicates failure.
28   if (java_result.is_null())
29     return false;
30 
31   base::string16 utf16_result =
32       base::android::ConvertJavaStringToUTF16(java_result);
33   output->Append(utf16_result.data(), static_cast<int>(utf16_result.size()));
34   return true;
35 }
36 
RegisterIcuAlternativesJni(JNIEnv * env)37 bool RegisterIcuAlternativesJni(JNIEnv* env) {
38   return android::RegisterNativesImpl(env);
39 }
40 
41 }  // namespace url
42