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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SCOPED_STRING_CHARS_H_included
#define SCOPED_STRING_CHARS_H_included
#include "JNIHelp.h"
// A smart pointer that provides access to a jchar* given a JNI jstring.
class ScopedStringChars {
public:
ScopedStringChars(JNIEnv* env, jstring s) : mEnv(env), mString(s), mSize(0) {
mChars = env->GetStringChars(mString, NULL);
if (mChars != NULL) {
mSize = env->GetStringLength(mString);
}
}
~ScopedStringChars() {
mEnv->ReleaseStringChars(mString, mChars);
}
const jchar* get() const { return mChars; }
const jchar& operator[](size_t n) const { return mChars[n]; }
size_t size() const { return mSize; }
private:
JNIEnv* mEnv;
jstring mString;
const jchar* mChars;
size_t mSize;
// Disallow copy and assignment.
ScopedStringChars(const ScopedStringChars&);
void operator=(const ScopedStringChars&);
};
#endif // SCOPED_STRING_CHARS_H_included
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