merge utilpp.h into util.h (#19710)
Dean Lee
4 years ago
committed by
GitHub
parent
5446a1c3dd
commit
595830135b
39 changed files with 126 additions and 170 deletions
@ -1,112 +0,0 @@ |
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#pragma once |
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#include <cstdio> |
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#include <unistd.h> |
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#include <csignal> |
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#include <string> |
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#include <memory> |
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#include <atomic> |
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#include <sstream> |
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#include <fstream> |
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#include <thread> |
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#include <chrono> |
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#ifndef sighandler_t |
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typedef void (*sighandler_t)(int sig); |
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#endif |
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namespace util { |
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inline bool starts_with(std::string s, std::string prefix) { |
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return s.compare(0, prefix.size(), prefix) == 0; |
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} |
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template<typename ... Args> |
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inline std::string string_format( const std::string& format, Args ... args ) { |
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size_t size = snprintf( nullptr, 0, format.c_str(), args ... ) + 1; |
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std::unique_ptr<char[]> buf( new char[ size ] ); |
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snprintf( buf.get(), size, format.c_str(), args ... ); |
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return std::string( buf.get(), buf.get() + size - 1 ); |
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} |
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inline std::string read_file(std::string fn) { |
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std::ifstream t(fn); |
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std::stringstream buffer; |
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buffer << t.rdbuf(); |
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return buffer.str(); |
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} |
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inline std::string tohex(const uint8_t* buf, size_t buf_size) { |
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std::unique_ptr<char[]> hexbuf(new char[buf_size*2+1]); |
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for (size_t i=0; i < buf_size; i++) { |
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sprintf(&hexbuf[i*2], "%02x", buf[i]); |
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} |
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hexbuf[buf_size*2] = 0; |
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return std::string(hexbuf.get(), hexbuf.get() + buf_size*2); |
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} |
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inline std::string base_name(std::string const & path) { |
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size_t pos = path.find_last_of("/"); |
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if (pos == std::string::npos) return path; |
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return path.substr(pos + 1); |
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} |
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inline std::string dir_name(std::string const & path) { |
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size_t pos = path.find_last_of("/"); |
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if (pos == std::string::npos) return ""; |
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return path.substr(0, pos); |
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} |
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inline std::string readlink(std::string path) { |
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char buff[4096]; |
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ssize_t len = ::readlink(path.c_str(), buff, sizeof(buff)-1); |
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if (len != -1) { |
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buff[len] = '\0'; |
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return std::string(buff); |
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} |
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return ""; |
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} |
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inline std::string getenv_default(const char* env_var, const char * suffix, const char* default_val) { |
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const char* env_val = getenv(env_var); |
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if (env_val != NULL){ |
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return std::string(env_val) + std::string(suffix); |
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} else { |
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return std::string(default_val); |
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} |
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} |
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inline void sleep_for(const int milliseconds) { |
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std::this_thread::sleep_for(std::chrono::milliseconds(milliseconds)); |
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} |
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} |
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class ExitHandler { |
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public: |
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ExitHandler() { |
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std::signal(SIGINT, (sighandler_t)set_do_exit); |
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std::signal(SIGTERM, (sighandler_t)set_do_exit); |
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}; |
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inline operator bool() { return do_exit; } |
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inline ExitHandler& operator=(bool v) { |
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do_exit = v; |
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return *this; |
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} |
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private: |
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static void set_do_exit(int sig) { do_exit = true; } |
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inline static std::atomic<bool> do_exit = false; |
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}; |
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struct unique_fd { |
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unique_fd(int fd = -1) : fd_(fd) {} |
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unique_fd& operator=(unique_fd&& uf) { |
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fd_ = uf.fd_; |
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uf.fd_ = -1; |
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return *this; |
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} |
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~unique_fd() { |
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if (fd_ != -1) close(fd_); |
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} |
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operator int() const { return fd_; } |
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int fd_; |
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}; |
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