| // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/android/jni_string.h" |
| |
| #include "base/android/jni_android.h" |
| #include "base/logging.h" |
| #include "base/utf_string_conversions.h" |
| |
| namespace base { |
| namespace android { |
| |
| std::string ConvertJavaStringToUTF8(JNIEnv* env, jstring str) { |
| // JNI's GetStringUTFChars() returns strings in Java-modified UTF8, so we |
| // instead get the String in UTF16 and convert using our own utility function. |
| return UTF16ToUTF8(ConvertJavaStringToUTF16(env, str)); |
| } |
| |
| jstring ConvertUTF8ToJavaString(JNIEnv* env, const base::StringPiece& str) { |
| // JNI's NewStringUTF expects "modified" UTF8 so instead create the string |
| // via our own UTF16 conversion utility. |
| // Further, Dalvik requires the string passed into NewStringUTF() to come from |
| // a trusted source. We can't guarantee that all UTF8 will be sanitized before |
| // it gets here, so constructing via UTF16 side-steps this issue. |
| // (Dalvik stores strings internally as UTF16 anyway, so there shouldn't be |
| // a significant performance hit by doing it this way). |
| return ConvertUTF16ToJavaString(env, UTF8ToUTF16(str)); |
| } |
| |
| string16 ConvertJavaStringToUTF16(JNIEnv* env, jstring str) { |
| const jchar* chars = env->GetStringChars(str, NULL); |
| DCHECK(chars); |
| // GetStringChars isn't required to NULL-terminate the strings |
| // it returns, so the length must be explicitly checked. |
| string16 result(chars, env->GetStringLength(str)); |
| env->ReleaseStringChars(str, chars); |
| CheckException(env); |
| return result; |
| } |
| |
| jstring ConvertUTF16ToJavaString(JNIEnv* env, const string16& str) { |
| jstring result = env->NewString(str.data(), str.length()); |
| CheckException(env); |
| return result; |
| } |
| |
| } // namespace android |
| } // namespace base |