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#ifndef STRING_BUILDER_INL_H_
#error "Direct inclusion of this file is not allowed, include string.h"
// For the sake of sane code completion.
#include "string_builder.h"
#endif
#include <library/cpp/yt/assert/assert.h>
#include <util/stream/str.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
inline char* TStringBuilderBase::Preallocate(size_t size)
{
Reserve(size + GetLength());
return Current_;
}
inline void TStringBuilderBase::Reserve(size_t size)
{
if (Y_UNLIKELY(End_ - Begin_ < static_cast<ssize_t>(size))) {
size_t length = GetLength();
auto newLength = std::max(size, MinBufferLength);
DoReserve(newLength);
Current_ = Begin_ + length;
}
}
inline size_t TStringBuilderBase::GetLength() const
{
return Current_ ? Current_ - Begin_ : 0;
}
inline TStringBuf TStringBuilderBase::GetBuffer() const
{
return TStringBuf(Begin_, Current_);
}
inline void TStringBuilderBase::Advance(size_t size)
{
Current_ += size;
YT_ASSERT(Current_ <= End_);
}
inline void TStringBuilderBase::AppendChar(char ch)
{
*Preallocate(1) = ch;
Advance(1);
}
inline void TStringBuilderBase::AppendChar(char ch, int n)
{
YT_ASSERT(n >= 0);
if (Y_LIKELY(0 != n)) {
char* dst = Preallocate(n);
::memset(dst, ch, n);
Advance(n);
}
}
inline void TStringBuilderBase::AppendString(TStringBuf str)
{
if (Y_LIKELY(str)) {
char* dst = Preallocate(str.length());
::memcpy(dst, str.begin(), str.length());
Advance(str.length());
}
}
inline void TStringBuilderBase::AppendString(const char* str)
{
AppendString(TStringBuf(str));
}
inline void TStringBuilderBase::Reset()
{
Begin_ = Current_ = End_ = nullptr;
DoReset();
}
template <class... TArgs>
void TStringBuilderBase::AppendFormat(TStringBuf format, TArgs&& ... args)
{
Format(this, TRuntimeFormat{format}, std::forward<TArgs>(args)...);
}
template <size_t Length, class... TArgs>
void TStringBuilderBase::AppendFormat(const char (&format)[Length], TArgs&& ... args)
{
Format(this, TRuntimeFormat{format}, std::forward<TArgs>(args)...);
}
////////////////////////////////////////////////////////////////////////////////
inline TString TStringBuilder::Flush()
{
Buffer_.resize(GetLength());
auto result = std::move(Buffer_);
Reset();
return result;
}
inline void TStringBuilder::DoReset()
{
Buffer_ = {};
}
inline void TStringBuilder::DoReserve(size_t newLength)
{
Buffer_.ReserveAndResize(newLength);
auto capacity = Buffer_.capacity();
Buffer_.ReserveAndResize(capacity);
Begin_ = &*Buffer_.begin();
End_ = Begin_ + capacity;
}
////////////////////////////////////////////////////////////////////////////////
inline void FormatValue(TStringBuilderBase* builder, const TStringBuilder& value, TStringBuf /*spec*/)
{
builder->AppendString(value.GetBuffer());
}
template <class T>
TString ToStringViaBuilder(const T& value, TStringBuf spec)
{
TStringBuilder builder;
FormatValue(&builder, value, spec);
return builder.Flush();
}
////////////////////////////////////////////////////////////////////////////////
// Compatibility for users of NYT::ToString(nyt_type).
template <CFormattable T>
TString ToString(const T& t)
{
return ToStringViaBuilder(t);
}
// Sometime we want to implement
// FormatValue using util's ToString
// However, if we inside the FormatValue
// we cannot just call the ToString since
// in this scope T is already CFormattable
// and ToString will call the very
// FormatValue we are implementing,
// causing an infinite recursion loop.
// This method is basically a call to
// util's ToString default implementation.
template <class T>
TString ToStringIgnoringFormatValue(const T& t)
{
TString s;
::TStringOutput o(s);
o << t;
return s;
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
#include <util/string/cast.h>
// util/string/cast.h extension for yt and std types only
// TODO(arkady-e1ppa): Abolish ::ToString in
// favour of either NYT::ToString or
// automatic formatting wherever it is needed.
namespace NPrivate {
template <class T>
requires (
(NYT::NDetail::IsNYTName<T>() ||
NYT::NDetail::IsStdName<T>()) &&
NYT::CFormattable<T>)
struct TToString<T, false>
{
static TString Cvt(const T& t)
{
return NYT::ToStringViaBuilder(t);
}
};
} // namespace NPrivate
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