hash32.h File Reference

This file contains functions related to hashing and compression. This is mainly used by Sen internals, but it's exposed to the public API as a convenience utility. More...

#include "sen/core/base/numbers.h"
#include <array>
#include <cstdint>
#include <cstring>
#include <filesystem>
#include <numeric>
#include <string>
#include <string_view>

Go to the source code of this file.

Namespaces
namespace	sen

Functions
template<typename InputIterator>
u32	sen::crc32 (InputIterator first, InputIterator last) noexcept
	Calculates the CRC32 for any sequence of values. (You could use type traits and a static assert to ensure the values can be converted to 8 bits.).
u32	sen::crc32 (std::string_view str) noexcept
	CRC32 for strings.
template<typename... Types>
u32	sen::hashCombine (u32 seed, const Types &... args) noexcept
	Combines the hash of different values into a single 32-bit hash.
template<typename... Types>
uint_fast32_t	sen::platformDependentHashCombine (uint_fast32_t seed, const Types &... args) noexcept
	Old version of the hashCombine method. The current one replaced this implementation to allow sen processes to discover and connect themselves between platforms (Windows and Linux). We keep this old implementation to enable replaying Sen recordings generated with the old hashes.
unsigned char *	sen::decompressSymbol (const void *compressedData)
	Decompresses a blob into its original shape.
std::string	sen::decompressSymbolToString (const void *compressedData, unsigned int originalSize)
	Decompresses a blob into a string.
bool	sen::fileToCompressedArrayFile (const std::filesystem::path &inputFile, std::string_view symbolName, const std::filesystem::path &outputFile)
	Creates a C++ source file that contains an array representing the contents of another file.
template<typename... Types>
std::uint_fast32_t	sen::platformDependentHashCombine (std::uint_fast32_t seed, const Types &... args) noexcept

Variables
constexpr u32	sen::hashSeed = 23835769U
	Initial seed for all hashes.
constexpr u32	sen::propertyHashSeed = 19830715U
constexpr u32	sen::methodHashSeed = 93580253U
constexpr u32	sen::eventHashSeed = 12125807U
constexpr u32	sen::nonPresentTypeHash = 18121997U
	This hash is combined when no Type is found in a certain spec.

Detailed Description

This file contains functions related to hashing and compression. This is mainly used by Sen internals, but it's exposed to the public API as a convenience utility.