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#include "stream.h"
#include <util/generic/bitops.h>
#include <util/generic/string.h>
#include <util/generic/utility.h>
#include <util/system/yassert.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
static constexpr size_t MinBufferGrowSize = 16;
////////////////////////////////////////////////////////////////////////////////
TStdStringOutput::TStdStringOutput(std::string& string) noexcept
: String_(&string)
{ }
TStdStringOutput::~TStdStringOutput() = default;
void TStdStringOutput::Reserve(size_t size)
{
String_->reserve(String_->size() + size);
}
void TStdStringOutput::Swap(TStdStringOutput& other) noexcept
{
DoSwap(String_, other.String_);
}
size_t TStdStringOutput::DoNext(void** ptr)
{
if (String_->size() == String_->capacity()) {
String_->reserve(FastClp2(String_->capacity() + MinBufferGrowSize));
}
size_t previousSize = String_->size();
ResizeUninitialized(*String_, String_->capacity());
*ptr = String_->data() + previousSize;
return String_->size() - previousSize;
}
void TStdStringOutput::DoUndo(size_t len)
{
Y_ABORT_UNLESS(len <= String_->size(), "trying to undo more bytes than actually written");
String_->resize(String_->size() - len);
}
void TStdStringOutput::DoWrite(const void* buf, size_t len)
{
String_->append(static_cast<const char*>(buf), len);
}
void TStdStringOutput::DoWriteC(char c)
{
String_->push_back(c);
}
////////////////////////////////////////////////////////////////////////////////
TStdStringStream::TStdStringStream()
: TEmbeddedString()
, TStdStringOutput(*TEmbeddedString::Ptr())
{ }
TStdStringStream::TStdStringStream(const std::string& string)
: TEmbeddedString(string)
, TStdStringOutput(*TEmbeddedString::Ptr())
{ }
TStdStringStream::TStdStringStream(std::string&& string)
: TEmbeddedString(std::move(string))
, TStdStringOutput(*TEmbeddedString::Ptr())
{ }
TStdStringStream::TStdStringStream(const TStdStringStream& other)
: TEmbeddedString(other.Str())
, TStdStringOutput(*TEmbeddedString::Ptr())
{ }
TStdStringStream::TStdStringStream(TStdStringStream&& other) noexcept
: TEmbeddedString(std::move(other).Str())
, TStdStringOutput(*TEmbeddedString::Ptr())
{ }
TStdStringStream& TStdStringStream::operator=(const TStdStringStream& other)
{
// The embedded string reference remains valid; only its contents change.
Str() = other.Str();
return *this;
}
TStdStringStream& TStdStringStream::operator=(TStdStringStream&& other) noexcept
{
// The embedded string reference remains valid; only its contents change.
Str() = std::move(other).Str();
return *this;
}
TStdStringStream::~TStdStringStream() = default;
TStdStringStream::operator bool() const noexcept
{
return !Empty();
}
std::string& TStdStringStream::Str() & noexcept
{
return *Ptr();
}
const std::string& TStdStringStream::Str() const& noexcept
{
return *Ptr();
}
std::string&& TStdStringStream::Str() && noexcept
{
return std::move(*Ptr());
}
const char* TStdStringStream::Data() const noexcept
{
return Ptr()->data();
}
size_t TStdStringStream::Size() const noexcept
{
return Ptr()->size();
}
bool TStdStringStream::Empty() const noexcept
{
return Ptr()->empty();
}
void TStdStringStream::Clear()
{
Str().clear();
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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