123 lines
3.0 KiB
C++
123 lines
3.0 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/utils/StringBuilder.h"
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#include "td/utils/misc.h"
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#include <cstdio>
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#include <locale>
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#include <sstream>
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namespace td {
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// TODO: optimize
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StringBuilder &StringBuilder::operator<<(int x) {
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if (unlikely(end_ptr_ < current_ptr_)) {
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return on_error();
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}
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current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%d", x);
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return *this;
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}
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StringBuilder &StringBuilder::operator<<(unsigned int x) {
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if (unlikely(end_ptr_ < current_ptr_)) {
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return on_error();
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}
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current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%u", x);
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return *this;
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}
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StringBuilder &StringBuilder::operator<<(long int x) {
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if (unlikely(end_ptr_ < current_ptr_)) {
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return on_error();
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}
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current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%ld", x);
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return *this;
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}
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StringBuilder &StringBuilder::operator<<(long unsigned int x) {
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if (unlikely(end_ptr_ < current_ptr_)) {
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return on_error();
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}
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current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%lu", x);
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return *this;
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}
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StringBuilder &StringBuilder::operator<<(long long int x) {
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if (unlikely(end_ptr_ < current_ptr_)) {
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return on_error();
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}
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current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%lld", x);
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return *this;
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}
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StringBuilder &StringBuilder::operator<<(long long unsigned int x) {
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if (unlikely(end_ptr_ < current_ptr_)) {
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return on_error();
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}
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current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%llu", x);
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return *this;
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}
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StringBuilder &StringBuilder::operator<<(double x) {
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if (unlikely(end_ptr_ < current_ptr_)) {
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return on_error();
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}
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static TD_THREAD_LOCAL std::stringstream *ss;
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if (init_thread_local<std::stringstream>(ss)) {
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ss->imbue(std::locale::classic());
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} else {
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ss->str(std::string());
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ss->clear();
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}
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*ss << x;
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int len = narrow_cast<int>(static_cast<std::streamoff>(ss->tellp()));
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auto left = end_ptr_ + reserved_size - current_ptr_;
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if (unlikely(len >= left)) {
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error_flag_ = true;
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len = left - 1;
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}
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ss->read(current_ptr_, len);
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current_ptr_ += len;
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return *this;
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}
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StringBuilder &StringBuilder::operator<<(const void *ptr) {
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if (unlikely(end_ptr_ < current_ptr_)) {
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return on_error();
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}
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current_ptr_ += std::snprintf(current_ptr_, reserved_size, "%p", ptr);
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return *this;
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}
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void StringBuilder::vprintf(const char *fmt, va_list list) {
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if (unlikely(end_ptr_ < current_ptr_)) {
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on_error();
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return;
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}
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auto left = end_ptr_ + reserved_size - current_ptr_;
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int len = std::vsnprintf(current_ptr_, left, fmt, list);
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if (unlikely(len >= left)) {
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error_flag_ = true;
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current_ptr_ += left - 1;
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} else {
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current_ptr_ += len;
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}
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}
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void StringBuilder::printf(const char *fmt, ...) {
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va_list list;
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va_start(list, fmt);
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vprintf(fmt, list);
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va_end(list);
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}
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} // namespace td
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