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#include "string.h"
#include <library/cpp/yt/assert/assert.h>
#include <library/cpp/yt/misc/variant.h>
#include <library/cpp/yt/memory/new.h>
namespace NYT::NYson {
////////////////////////////////////////////////////////////////////////////////
TYsonStringBuf::TYsonStringBuf()
{
Type_ = EYsonType::Node; // fake
Null_ = true;
}
TYsonStringBuf::TYsonStringBuf(const TYsonString& ysonString)
{
if (ysonString) {
Data_ = ysonString.AsStringBuf();
Type_ = ysonString.GetType();
Null_ = false;
} else {
Type_ = EYsonType::Node; // fake
Null_ = true;
}
}
TYsonStringBuf::TYsonStringBuf(const TString& data, EYsonType type)
: TYsonStringBuf(TStringBuf(data), type)
{ }
TYsonStringBuf::TYsonStringBuf(TStringBuf data, EYsonType type)
: Data_(data)
, Type_(type)
, Null_(false)
{ }
TYsonStringBuf::TYsonStringBuf(const char* data, EYsonType type)
: TYsonStringBuf(TStringBuf(data), type)
{ }
TYsonStringBuf::operator bool() const
{
return !Null_;
}
TStringBuf TYsonStringBuf::AsStringBuf() const
{
YT_VERIFY(*this);
return Data_;
}
EYsonType TYsonStringBuf::GetType() const
{
YT_VERIFY(*this);
return Type_;
}
////////////////////////////////////////////////////////////////////////////////
TYsonString::TYsonString()
{
Begin_ = nullptr;
Size_ = 0;
Type_ = EYsonType::Node; // fake
}
TYsonString::TYsonString(const TYsonStringBuf& ysonStringBuf)
{
if (ysonStringBuf) {
auto data = ysonStringBuf.AsStringBuf();
auto holder = NDetail::TYsonStringHolder::Allocate(data.length());
::memcpy(holder->GetData(), data.data(), data.length());
Begin_ = holder->GetData();
Size_ = data.Size();
Type_ = ysonStringBuf.GetType();
Payload_ = std::move(holder);
} else {
Begin_ = nullptr;
Size_ = 0;
Type_ = EYsonType::Node; // fake
}
}
TYsonString::TYsonString(
TStringBuf data,
EYsonType type)
: TYsonString(TYsonStringBuf(data, type))
{ }
#ifdef TSTRING_IS_STD_STRING
TYsonString::TYsonString(
const TString& data,
EYsonType type)
: TYsonString(TYsonStringBuf(data, type))
{ }
#else
TYsonString::TYsonString(
const TString& data,
EYsonType type)
{
// NOTE: CoW TString implementation is assumed
// Moving the payload MUST NOT invalidate its internal pointers
Payload_ = data;
Begin_ = data.data();
Size_ = data.length();
Type_ = type;
}
#endif
TYsonString::TYsonString(
const TSharedRef& data,
EYsonType type)
{
Payload_ = data.GetHolder();
Begin_ = data.Begin();
Size_ = data.Size();
Type_ = type;
}
TYsonString::operator bool() const
{
return !std::holds_alternative<TNullPayload>(Payload_);
}
EYsonType TYsonString::GetType() const
{
YT_VERIFY(*this);
return Type_;
}
TStringBuf TYsonString::AsStringBuf() const
{
YT_VERIFY(*this);
return TStringBuf(Begin_, Begin_ + Size_);
}
TString TYsonString::ToString() const
{
return Visit(
Payload_,
[] (const TNullPayload&) -> TString {
YT_ABORT();
},
[&] (const TSharedRangeHolderPtr&) {
return TString(AsStringBuf());
},
[] (const TString& payload) {
return payload;
});
}
TSharedRef TYsonString::ToSharedRef() const
{
return Visit(
Payload_,
[] (const TNullPayload&) -> TSharedRef {
YT_ABORT();
},
[&] (const TSharedRangeHolderPtr& holder) {
return TSharedRef(Begin_, Size_, holder);
},
[] (const TString& payload) {
return TSharedRef::FromString(payload);
});
}
size_t TYsonString::ComputeHash() const
{
return THash<TStringBuf>()(TStringBuf(Begin_, Begin_ + Size_));
}
void TYsonString::Save(IOutputStream* s) const
{
EYsonType type = Type_;
if (*this) {
::SaveMany(s, type, ToSharedRef());
} else {
::SaveMany(s, type, TString());
}
}
void TYsonString::Load(IInputStream* s)
{
EYsonType type;
TString data;
::LoadMany(s, type, data);
if (data) {
*this = TYsonString(data, type);
} else {
*this = TYsonString();
}
}
////////////////////////////////////////////////////////////////////////////////
TString ToString(const TYsonString& yson)
{
return yson.ToString();
}
TString ToString(const TYsonStringBuf& yson)
{
return TString(yson.AsStringBuf());
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT::NYson
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