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tdlib-fork/tdutils/td/utils/StringBuilder.cpp
levlam 6b927449eb Fix some includes.
GitOrigin-RevId: 08add4bab90bb23e0e71340ac647ce8cafc4b900
2018-02-11 18:58:18 +03:00

103 lines
2.7 KiB
C++

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
//
// 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)
//
#include "td/utils/StringBuilder.h"
#include "td/utils/misc.h"
#include "td/utils/port/thread_local.h"
#include <cstdio>
#include <locale>
#include <sstream>
namespace td {
// TODO: optimize
StringBuilder &StringBuilder::operator<<(int x) {
if (unlikely(end_ptr_ < current_ptr_)) {
return on_error();
}
current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%d", x);
return *this;
}
StringBuilder &StringBuilder::operator<<(unsigned int x) {
if (unlikely(end_ptr_ < current_ptr_)) {
return on_error();
}
current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%u", x);
return *this;
}
StringBuilder &StringBuilder::operator<<(long int x) {
if (unlikely(end_ptr_ < current_ptr_)) {
return on_error();
}
current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%ld", x);
return *this;
}
StringBuilder &StringBuilder::operator<<(long unsigned int x) {
if (unlikely(end_ptr_ < current_ptr_)) {
return on_error();
}
current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%lu", x);
return *this;
}
StringBuilder &StringBuilder::operator<<(long long int x) {
if (unlikely(end_ptr_ < current_ptr_)) {
return on_error();
}
current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%lld", x);
return *this;
}
StringBuilder &StringBuilder::operator<<(long long unsigned int x) {
if (unlikely(end_ptr_ < current_ptr_)) {
return on_error();
}
current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%llu", x);
return *this;
}
StringBuilder &StringBuilder::operator<<(FixedDouble x) {
if (unlikely(end_ptr_ < current_ptr_)) {
return on_error();
}
static TD_THREAD_LOCAL std::stringstream *ss;
if (init_thread_local<std::stringstream>(ss)) {
ss->imbue(std::locale::classic());
ss->setf(std::ios_base::fixed, std::ios_base::floatfield);
} else {
ss->str(std::string());
ss->clear();
}
ss->precision(x.precision);
*ss << x.d;
int len = narrow_cast<int>(static_cast<std::streamoff>(ss->tellp()));
auto left = end_ptr_ + reserved_size - current_ptr_;
if (unlikely(len >= left)) {
error_flag_ = true;
len = left ? narrow_cast<int>(left - 1) : 0;
}
ss->read(current_ptr_, len);
current_ptr_ += len;
return *this;
}
StringBuilder &StringBuilder::operator<<(const void *ptr) {
if (unlikely(end_ptr_ < current_ptr_)) {
return on_error();
}
current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%p", ptr);
return *this;
}
} // namespace td