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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "nbostream.h"
#include "hexdump.h"
#include <vespa/vespalib/util/exceptions.h>
#include <vespa/vespalib/util/stringfmt.h>
#include <cassert>
namespace vespalib {
nbostream::nbostream(size_t initialSize) :
_wbuf(),
_rbuf(),
_rp(0),
_wp(0),
_state(ok),
_longLivedBuffer(false)
{
extend(initialSize);
}
nbostream::nbostream(const void * buf, size_t sz, bool longLivedBuffer) :
_wbuf(),
_rbuf(buf, sz),
_rp(0),
_wp(sz),
_state(ok),
_longLivedBuffer(longLivedBuffer)
{ }
nbostream_longlivedbuf::nbostream_longlivedbuf(const void * buf, size_t sz) :
nbostream(buf, sz, true)
{ }
nbostream_longlivedbuf::nbostream_longlivedbuf(size_t initialSize) :
nbostream(initialSize)
{ }
nbostream::nbostream(const void * buf, size_t sz) :
nbostream(buf, sz, false)
{ }
nbostream::nbostream(Alloc && buf, size_t sz) :
_wbuf(std::move(buf), sz),
_rbuf(_wbuf.data(), sz),
_rp(0),
_wp(sz),
_state(ok),
_longLivedBuffer(false)
{
assert(_wbuf.size() >= sz);
}
nbostream::nbostream(const nbostream & rhs) :
_wbuf(),
_rbuf(),
_rp(0),
_wp(0),
_state(ok),
_longLivedBuffer(false)
{
extend(rhs.size());
_wp = rhs.size();
if (_wp > 0) {
memcpy(_wbuf.data(), &rhs._rbuf[rhs._rp], _wp);
}
}
nbostream::nbostream(nbostream && rhs) noexcept
: _wbuf(std::move(rhs._wbuf)),
_rbuf(rhs._rbuf),
_rp(rhs._rp),
_wp(rhs._wp),
_state(rhs._state),
_longLivedBuffer(rhs._longLivedBuffer)
{
rhs._rp = 0;
rhs._wp = 0;
rhs._rbuf = ConstBufferRef();
if (!_longLivedBuffer && (_wbuf.capacity() == 0)) {
_wbuf.resize(roundUp2inN(_rbuf.size()));
if (size() > 0) {
memcpy(_wbuf.data(), &_rbuf[_rp], size());
}
_wp = size();
_rp = 0;
_rbuf = ConstBufferRef(_wbuf.data(), _wbuf.capacity());
}
}
nbostream &
nbostream::operator = (nbostream && rhs) noexcept {
nbostream tmp(std::move(rhs));
swap(tmp);
return *this;
}
nbostream &
nbostream::operator = (const nbostream & rhs) {
if (this != &rhs) {
nbostream n(rhs);
swap(n);
}
return *this;
}
nbostream::~nbostream() = default;
void nbostream::fail(State s)
{
_state = static_cast<State>(_state | s);
throw IllegalStateException(make_string("Stream failed bufsize(%zu), readp(%zu), writep(%zu)", _wbuf.size(), _rp, _wp), VESPA_STRLOC);
}
std::ostream & operator << (std::ostream & os, const nbostream & s) {
return os << HexDump(&s._rbuf[s._rp], s.left());
}
void nbostream::reserve(size_t sz)
{
if (capacity() < sz) {
extend(sz - capacity());
}
}
void nbostream::compact()
{
if (left() > 0) {
memmove(_wbuf.data(), &_rbuf[_rp], left());
}
_wp = left();
_rp = 0;
}
void nbostream::extend(size_t extraSize)
{
if (_wbuf.data() != _rbuf.c_str()) {
_wbuf.resize(roundUp2inN(_rbuf.size() + extraSize));
compact();
_rbuf = ConstBufferRef(_wbuf.data(), _wbuf.capacity());
}
if (_rp != 0) {
compact();
}
if (space() < extraSize) {
_wbuf.resize(roundUp2inN(_wbuf.size() + extraSize));
_rbuf = ConstBufferRef(_wbuf.data(), _wbuf.capacity());
}
}
void nbostream::swap(Buffer & buf) {
if (_rp != 0) {
compact();
}
_wbuf.resize(size());
_wbuf.swap(buf);
_rbuf = ConstBufferRef(_wbuf.data(), _wbuf.capacity());
_wp = _wbuf.size();
_rp = 0;
_state = ok;
}
void nbostream::swap(nbostream & os)
{
std::swap(_rp, os._rp);
std::swap(_wp, os._wp);
std::swap(_state, os._state);
_wbuf.swap(os._wbuf);
std::swap(_rbuf, os._rbuf);
std::swap(_longLivedBuffer, os._longLivedBuffer);
}
}
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