bsnes/nall/hash/hash.hpp

48 lines
1.2 KiB
C++

#pragma once
#include <nall/arithmetic.hpp>
#include <nall/range.hpp>
#include <nall/string.hpp>
//cannot use constructor inheritance due to needing to call virtual reset();
//instead, define a macro to reduce boilerplate code in every Hash subclass
#define nallHash(Name) \
Name() { reset(); } \
Name(const void* data, uint64_t size) : Name() { input(data, size); } \
Name(const vector<uint8_t>& data) : Name() { input(data); } \
Name(const string& data) : Name() { input(data); } \
using Hash::input; \
namespace nall::Hash {
struct Hash {
virtual auto reset() -> void = 0;
virtual auto input(uint8_t data) -> void = 0;
virtual auto output() const -> vector<uint8_t> = 0;
auto input(array_view<uint8_t> data) -> void {
for(auto byte : data) input(byte);
}
auto input(const void* data, uint64_t size) -> void {
auto p = (const uint8_t*)data;
while(size--) input(*p++);
}
auto input(const vector<uint8_t>& data) -> void {
for(auto byte : data) input(byte);
}
auto input(const string& data) -> void {
for(auto byte : data) input(byte);
}
auto digest() const -> string {
string result;
for(auto n : output()) result.append(hex(n, 2L));
return result;
}
};
}