tdlight/tdutils/td/utils/SliceBuilder.h
2022-01-01 03:35:39 +03:00

58 lines
1.3 KiB
C++

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/utils/common.h"
#include "td/utils/Slice.h"
#include "td/utils/StackAllocator.h"
#include "td/utils/StringBuilder.h"
#define PSLICE() ::td::detail::Slicify() & ::td::SliceBuilder().ref()
#define PSTRING() ::td::detail::Stringify() & ::td::SliceBuilder().ref()
namespace td {
class SliceBuilder {
public:
template <class T>
SliceBuilder &operator<<(T &&other) {
sb_ << other;
return *this;
}
MutableCSlice as_cslice() {
return sb_.as_cslice();
}
SliceBuilder &ref() {
return *this;
}
private:
static const size_t DEFAULT_BUFFER_SIZE = 1024;
decltype(StackAllocator::alloc(0)) buffer_ = StackAllocator::alloc(DEFAULT_BUFFER_SIZE);
StringBuilder sb_ = StringBuilder(buffer_.as_slice(), true);
};
namespace detail {
class Slicify {
public:
CSlice operator&(SliceBuilder &slice_builder) {
return slice_builder.as_cslice();
}
};
class Stringify {
public:
string operator&(SliceBuilder &slice_builder) {
return slice_builder.as_cslice().str();
}
};
} // namespace detail
} // namespace td