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36 lines
1.0 KiB
C++
36 lines
1.0 KiB
C++
//-----------------------------------------------------------------------------
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// The original MurmurHash2 was written by Austin Appleby, and is placed in the
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// public domain. The author hereby disclaims copyright to this source code.
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//
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// This was modified as to possibilitate it's usage incrementally.
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// Those modifications are also placed in the public domain, and the author of
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// such modifications hereby disclaims copyright to this source code.
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#pragma once
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#include <cstdint>
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#include <functional>
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namespace Murmur2 {
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#define KiB 1024
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#define MiB 1024 * KiB
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class Reader {
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public:
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virtual ~Reader() = default;
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virtual int read(char* s, int n) = 0;
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virtual bool eof() = 0;
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virtual void goToBeginning() = 0;
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};
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uint32_t hash(Reader* file_stream, std::size_t buffer_size = 4 * MiB, std::function<bool(char)> filter_out = [](char) { return false; });
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struct IncrementalHashInfo {
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uint32_t h;
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uint32_t len;
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};
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void FourBytes_MurmurHash2(const unsigned char* data, IncrementalHashInfo& prev);
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} // namespace Murmur2
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