// Copyright 2017 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef _BSDIFF_SUFFIX_ARRAY_INDEX_INTERFACE_H_
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#define _BSDIFF_SUFFIX_ARRAY_INDEX_INTERFACE_H_
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// The SuffixArrayIndexInterface encapsulates a search index based on a
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// suffix-array with a common string search interface. The implementations of
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// this index can vary on technical details, such as the size of the internal
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// suffix array elements, which are not visible in this interface.
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#include <stddef.h>
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#include <stdint.h>
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namespace bsdiff {
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class SuffixArrayIndexInterface {
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public:
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virtual ~SuffixArrayIndexInterface() = default;
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// Search in the index the longest prefix of the string |target| of length
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// |length|. The length of the longest prefix found, which could be 0, is
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// stored in |out_length| and a position in the source text where this prefix
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// was found is store in |out_pos|.
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virtual void SearchPrefix(const uint8_t* target,
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size_t length,
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size_t* out_length,
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uint64_t* out_pos) const = 0;
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protected:
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SuffixArrayIndexInterface() = default;
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};
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} // namespace bsdiff
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#endif // _BSDIFF_SUFFIX_ARRAY_INDEX_INTERFACE_H_
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