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ircd: Improve network buffers utils.

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This commit is contained in:
Jason Volk 2016-09-28 14:15:09 -07:00
parent 4bf52e93b3
commit f7e6fd1b31
1 changed files with 152 additions and 9 deletions
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161
include/ircd/bufs.h
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@ -49,6 +49,17 @@ size_t size(const const_buffer &buf);
template<class mutable_buffers> size_t size(const mutable_buffers &iov);
template<class const_buffers> size_t size(const const_buffers &iov);
template<class T = uint8_t *> T data(const mutable_buffer &buf);
template<class T = uint8_t *> T begin(const mutable_buffer &buf);
template<class T = uint8_t *> T end(const mutable_buffer &buf);
template<class T = uint8_t *> std::reverse_iterator<T> rbegin(const mutable_buffer &buf);
template<class T = uint8_t *> std::reverse_iterator<T> rend(const mutable_buffer &buf);
template<class T = const uint8_t *> T data(const const_buffer &buf);
template<class T = const uint8_t *> T begin(const const_buffer &buf);
template<class T = const uint8_t *> T end(const const_buffer &buf);
template<class T = const uint8_t *> std::reverse_iterator<T> rbegin(const const_buffer &buf);
template<class T = const uint8_t *> std::reverse_iterator<T> rend(const const_buffer &buf);
size_t copy(const const_buffer &src, const mutable_buffer &dst);
template<class buffers> size_t copy(const buffers &iov, const mutable_buffer &buf);
template<class mutable_buffers> size_t copy(const mutable_buffer &buf, const mutable_buffers &iov);
@ -57,6 +68,61 @@ template<class mutable_buffers> size_t copy(const const_buffer &buf, const mutab
void fill(const mutable_buffer &buf, const uint8_t &val = 0);
template<class mutable_buffers> void fill(const mutable_buffers &buf, const uint8_t &val = 0);
std::string string(const mutable_buffer &);
std::string string(const const_buffer &);
template<class buffer>
struct unique_buffer
:buffer
{
template<class T> unique_buffer(std::unique_ptr<T[]> &&, const size_t &size);
unique_buffer(const size_t &size);
~unique_buffer() noexcept;
};
template<class buffer>
template<class T>
unique_buffer<buffer>::unique_buffer(std::unique_ptr<T[]> &&b,
const size_t &size)
:buffer{b.release(), size}
{
}
template<class buffer>
unique_buffer<buffer>::unique_buffer(const size_t &size)
:unique_buffer
{
std::unique_ptr<uint8_t[]>{new __attribute__((aligned(16))) uint8_t[size]},
size
}
{
}
template<class buffer>
unique_buffer<buffer>::~unique_buffer()
noexcept
{
delete[] data(*this);
}
template<class buffer>
std::string
string(const unique_buffer<buffer> &buf)
{
return string(static_cast<const buffer &>(buf));
}
inline std::string
string(const const_buffer &buf)
{
return { data<const char *>(buf), size(buf) };
}
inline std::string
string(const mutable_buffer &buf)
{
return { data<const char *>(buf), size(buf) };
}
template<class mutable_buffers>
void
@ -71,7 +137,7 @@ inline void
fill(const mutable_buffer &buf,
const uint8_t &val)
{
memset(buffer_cast<uint8_t *>(buf), val, size(buf));
memset(data(buf), val, size(buf));
}
template<class mutable_buffers>
@ -84,8 +150,8 @@ copy(const const_buffer &buf,
{
const auto remain(buffer_size(buf) - ret);
const auto cp_sz(std::min(buffer_size(dst), remain));
const auto src(buffer_cast<const uint8_t *>(buf) + ret);
memcpy(buffer_cast<uint8_t *>(dst), src, cp_sz);
const auto src(data(buf) + ret);
memcpy(data(dst), src, cp_sz);
ret += cp_sz;
}
@ -102,8 +168,8 @@ copy(const mutable_buffer &buf,
{
const auto remain(buffer_size(buf) - ret);
const auto cp_sz(std::min(buffer_size(dst), remain));
const auto src(buffer_cast<const uint8_t *>(buf) + ret);
memcpy(buffer_cast<uint8_t *>(dst), src, cp_sz);
const auto src(data(buf) + ret);
memcpy(data(dst), src, cp_sz);
ret += cp_sz;
}
@ -120,8 +186,8 @@ copy(const buffers &iov,
{
const auto remain(buffer_size(buf) - ret);
const auto cp_sz(std::min(buffer_size(src), remain));
const auto dst(buffer_cast<uint8_t *>(buf) + ret);
memcpy(dst, buffer_cast<const uint8_t *>(src), cp_sz);
const auto dst(data(buf) + ret);
memcpy(dst, data(src), cp_sz);
ret += cp_sz;
}
@ -133,10 +199,87 @@ copy(const const_buffer &src,
const mutable_buffer &dst)
{
const auto cp_sz(std::min(buffer_size(src), buffer_size(dst)));
memcpy(buffer_cast<uint8_t *>(dst), buffer_cast<const uint8_t *>(src), cp_sz);
memcpy(data(dst), data(src), cp_sz);
return cp_sz;
}
template<class T>
std::reverse_iterator<T>
rend(const const_buffer &buf)
{
return begin<T>(buf);
}
template<class T>
std::reverse_iterator<T>
rbegin(const const_buffer &buf)
{
return std::reverse_iterator<T>(begin<T>(buf) + size(buf));
}
template<class T>
T
end(const const_buffer &buf)
{
return begin<T>(buf) + size(buf);
}
template<class T>
T
begin(const const_buffer &buf)
{
return data<T>(buf);
}
template<class T>
T
data(const const_buffer &buf)
{
return buffer_cast<T>(buf);
}
template<class T>
std::reverse_iterator<T>
rend(const mutable_buffer &buf)
{
return begin<T>(buf);
}
template<class T>
std::reverse_iterator<T>
rbegin(const mutable_buffer &buf)
{
return std::reverse_iterator<T>(begin<T>(buf) + size(buf));
}
template<class T>
T
end(const mutable_buffer &buf)
{
return begin<T>(buf) + size(buf);
}
template<class T>
T
begin(const mutable_buffer &buf)
{
return data<T>(buf);
}
template<class T>
T
data(const mutable_buffer &buf)
{
return buffer_cast<T>(buf);
}
template<class buffer>
size_t
size(const unique_buffer<buffer> &buf)
{
return size(static_cast<const buffer &>(buf));
}
template<class buffers>
size_t
size(const buffers &iov)
@ -144,7 +287,7 @@ size(const buffers &iov)
return std::accumulate(begin(iov), end(iov), size_t(0), []
(auto ret, const auto &buffer)
{
return ret += buffer_size(buffer);
return ret += size(buffer);
});
}