mirror of
https://github.com/matrix-construct/construct
synced 2024-10-30 18:39:02 +01:00
124 lines
3.2 KiB
C++
124 lines
3.2 KiB
C++
/*
|
|
* charybdis: 21st Century IRC++d
|
|
*
|
|
* Copyright (C) 2017 Charybdis Development Team
|
|
* Copyright (C) 2017 Jason Volk <jason@zemos.net>
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice is present in all copies.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_HASH_H
|
|
|
|
namespace ircd
|
|
{
|
|
constexpr size_t hash(const char *const &str, const size_t i = 0);
|
|
constexpr size_t hash(const char16_t *const &str, const size_t i = 0);
|
|
|
|
size_t hash(const std::string &str, const size_t i = 0);
|
|
size_t hash(const std::u16string &str, const size_t i = 0);
|
|
size_t hash(const std::string_view &str, const size_t i = 0);
|
|
}
|
|
|
|
namespace ircd::crh
|
|
{
|
|
IRCD_EXCEPTION(ircd::error, error)
|
|
|
|
struct hash;
|
|
struct sha256;
|
|
}
|
|
|
|
namespace ircd
|
|
{
|
|
using crh::hash;
|
|
using crh::sha256;
|
|
}
|
|
|
|
struct ircd::crh::hash
|
|
{
|
|
virtual size_t length() const = 0;
|
|
virtual void finalize(const mutable_raw_buffer &) = 0;
|
|
virtual void extract(const mutable_raw_buffer &) const = 0;
|
|
virtual void update(const const_buffer &) = 0;
|
|
|
|
// conveniences
|
|
void finalize(const mutable_raw_buffer &) const;
|
|
void operator()(const mutable_raw_buffer &out, const const_buffer &in);
|
|
hash &operator+=(const const_buffer &);
|
|
|
|
virtual ~hash() noexcept;
|
|
};
|
|
|
|
struct ircd::crh::sha256
|
|
:hash
|
|
{
|
|
struct ctx;
|
|
|
|
static constexpr const size_t bytes
|
|
{
|
|
256 / 8
|
|
};
|
|
|
|
protected:
|
|
std::unique_ptr<ctx> ctx;
|
|
|
|
public:
|
|
size_t length() const override;
|
|
void finalize(const mutable_raw_buffer &) override;
|
|
void extract(const mutable_raw_buffer &) const override;
|
|
void update(const const_buffer &) override;
|
|
|
|
sha256(const mutable_raw_buffer &, const const_buffer &);
|
|
sha256();
|
|
~sha256() noexcept;
|
|
};
|
|
|
|
inline size_t
|
|
ircd::hash(const std::string_view &str,
|
|
const size_t i)
|
|
{
|
|
return i >= str.size()? 7681ULL : (hash(str, i+1) * 33ULL) ^ str.at(i);
|
|
}
|
|
|
|
inline size_t
|
|
ircd::hash(const std::u16string &str,
|
|
const size_t i)
|
|
{
|
|
return i >= str.size()? 7681ULL : (hash(str, i+1) * 33ULL) ^ str.at(i);
|
|
}
|
|
|
|
inline size_t
|
|
ircd::hash(const std::string &str,
|
|
const size_t i)
|
|
{
|
|
return i >= str.size()? 7681ULL : (hash(str, i+1) * 33ULL) ^ str.at(i);
|
|
}
|
|
|
|
constexpr size_t
|
|
ircd::hash(const char16_t *const &str,
|
|
const size_t i)
|
|
{
|
|
return !str[i]? 7681ULL : (hash(str, i+1) * 33ULL) ^ str[i];
|
|
}
|
|
|
|
constexpr size_t
|
|
ircd::hash(const char *const &str,
|
|
const size_t i)
|
|
{
|
|
return !str[i]? 7681ULL : (hash(str, i+1) * 33ULL) ^ str[i];
|
|
}
|