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utils.h
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104 lines (82 loc) · 2.13 KB
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/*
Copyright (C) 2024 [email protected]
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef __utils_h__
#define __utils_h__
#include <fcntl.h>
#include <unistd.h>
#include <string>
template <typename F>
auto ScopeTail(F&& func)
{
class _ScopeTail {
F _func;
public:
_ScopeTail(F&& func)
: _func(std::move(func))
{
}
~_ScopeTail()
{
_func();
}
};
return _ScopeTail(std::move(func));
};
struct UniqueFD {
int fd;
public:
UniqueFD(int fd=-1)
: fd(fd)
{ }
UniqueFD(const UniqueFD&) = delete;
UniqueFD& operator =(const UniqueFD&) = delete;
UniqueFD(UniqueFD&& other) noexcept {
fd = other.fd;
other.fd = -1;
}
UniqueFD& operator=(UniqueFD&& other) {
close();
fd = other.fd;
other.fd = -1;
return *this;
}
~UniqueFD() {
close();
}
void close() {
if (fd != -1) {
::close(fd);
fd = -1;
}
}
explicit operator int() const {
return fd;
}
explicit operator bool() const {
return fd != -1;
}
int release() {
int tmp = fd;
fd = -1;
return tmp;
}
int get() const {
return fd;
}
};
std::string get_random_string(size_t n);
std::vector<char> read_file(int fd, ssize_t size=-1);
std::vector<char> read_file(const std::string& filename, ssize_t size=-1);
bool write_file(const std::string& filename, const std::string& content);
#endif