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6f40e9a23f
Summary: Most uses of `size_t` in `eden` are unqualified, but a few are qualified. As discussed ad nauseum in https://stackoverflow.com/questions/5813700/difference-between-size-t-and-stdsize-t it is totally safe to use unqualified `size_t` with all compilers/platforms. Since this saves 5 chars per use, and to improve uniformity, I ran: ``` $ find ~/fbsource/fbcode/eden -type f \ | egrep '\.(h|cpp)$' \ | xargs sed -i 's/std::size_t/size_t/g' ``` Reviewed By: chadaustin Differential Revision: D7021980 fbshipit-source-id: da268e62a9a93d2a5168a40b6878795ae7516b7f
95 lines
2.0 KiB
C++
95 lines
2.0 KiB
C++
/*
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* Copyright (c) 2016-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#pragma once
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#include <boost/operators.hpp>
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#include <folly/Range.h>
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#include <stdint.h>
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#include <array>
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#include <iosfwd>
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namespace folly {
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class IOBuf;
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}
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namespace facebook {
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namespace eden {
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/**
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* Immutable 160-bit hash.
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*/
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class Hash : boost::totally_ordered<Hash> {
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public:
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enum { RAW_SIZE = 20 };
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using Storage = std::array<uint8_t, RAW_SIZE>;
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/**
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* Create a 0-initialized hash
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*/
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Hash();
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explicit Hash(Storage bytes);
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explicit Hash(folly::ByteRange bytes);
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/**
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* @param hex is a string of 40 hexadecimal characters.
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*/
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explicit Hash(folly::StringPiece hex);
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/**
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* Compute the SHA1 hash of an IOBuf chain.
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*/
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static Hash sha1(const folly::IOBuf* buf);
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/**
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* Compute the SHA1 hash of a ByteRange
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*/
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static Hash sha1(folly::ByteRange data);
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folly::ByteRange getBytes() const;
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folly::MutableByteRange mutableBytes();
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/** @return 40-character [lowercase] hex representation of this hash. */
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std::string toString() const;
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size_t getHashCode() const;
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bool operator==(const Hash&) const;
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bool operator<(const Hash&) const;
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private:
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Storage bytes_;
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};
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/** A hash object initialized to all zeroes */
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extern const Hash kZeroHash;
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/**
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* Output stream operator for Hash.
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*
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* This makes it possible to easily use Hash in glog statements.
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*/
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std::ostream& operator<<(std::ostream& os, const Hash& hash);
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/* Define toAppend() so folly::to<string>(Hash) will work */
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void toAppend(const Hash& hash, std::string* result);
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} // namespace eden
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} // namespace facebook
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namespace std {
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template <>
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struct hash<facebook::eden::Hash> {
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size_t operator()(const facebook::eden::Hash& hash) const {
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return hash.getHashCode();
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}
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};
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} // namespace std
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