33 lines
1.1 KiB
C++
33 lines
1.1 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef INCLUDE_DATA_SOURCE_H_
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#define INCLUDE_DATA_SOURCE_H_
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#include <jni.h>
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#include <sys/types.h>
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class DataSource {
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public:
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virtual ~DataSource() {}
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// Returns the number of bytes read, or -1 on failure. It's not an error if
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// this returns zero; it just means the given offset is equal to, or
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// beyond, the end of the source.
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virtual ssize_t readAt(off64_t offset, void* const data, size_t size) = 0;
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};
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#endif // INCLUDE_DATA_SOURCE_H_
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