gui_hash.h File Reference

#include <stdint.h>
#include <string_view>

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Namespaces
namespace	tachyon
namespace	tachyon::Hash

Functions
constexpr uint64_t	tachyon::Hash::CalculateConst (std::string_view str, uint64_t hash=Basis)
	FNV-1a hash of str, usable at compile time; hash continues an earlier hash.
uint64_t	tachyon::Hash::Calculate (std::string_view str)
	FNV-1a hash of str; same result as CalculateConst.
uint64_t	tachyon::Hash::CalculateBytes (const void *data, size_t len)
	FNV-1a hash of len bytes at data.
template<typename T, typename = std::enable_if_t<std::is_trivially_copyable_v<std::decay_t<T>> && !std::is_pointer_v<std::decay_t<T>> && !std::is_same_v<std::decay_t<T>, std::string_view>>>
uint64_t	tachyon::Hash::Calculate (const T &value)
	FNV-1a hash of a trivially-copyable value's bytes, padding included.
constexpr uint64_t	tachyon::Hash::Combine (uint64_t a, uint64_t b)
	Order-dependent combine; repeated values don't cancel out.
template<typename... Args>
constexpr uint64_t	tachyon::Hash::Combine (const Args &... args)
	Combines the Calculate hashes of args, in order.

Variables
constexpr uint64_t	tachyon::Hash::Basis = 14695981039346656037ULL
	FNV-1a 64-bit offset basis (Prime is the FNV-1a prime).
constexpr uint64_t	tachyon::Hash::Prime = 1099511628211ULL