gbe_fork/helpers/common_helpers.cpp

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#include "common_helpers/common_helpers.hpp"
#include <fstream>
#include <cwchar>
#include <algorithm>
#include <cctype>
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#include <random>
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// for gmtime_s()
#define __STDC_WANT_LIB_EXT1__ 1
#include <time.h>
namespace common_helpers {
KillableWorker::KillableWorker(
std::function<bool(void *)> thread_job,
std::chrono::milliseconds initial_delay,
std::chrono::milliseconds polling_time,
std::function<bool()> should_kill)
{
this->thread_job = thread_job;
this->initial_delay = initial_delay;
this->polling_time = polling_time;
this->should_kill = should_kill;
}
KillableWorker::~KillableWorker()
{
kill();
}
KillableWorker& KillableWorker::operator=(const KillableWorker &other)
{
if (&other == this) {
return *this;
}
kill();
thread_obj = {};
initial_delay = other.initial_delay;
polling_time = other.polling_time;
should_kill = other.should_kill;
thread_job = other.thread_job;
return *this;
}
void KillableWorker::thread_proc(void *data)
{
// wait for some time
if (initial_delay.count() > 0) {
std::unique_lock lck(kill_thread_mutex);
if (kill_thread_cv.wait_for(lck, initial_delay, [this]{ return this->kill_thread || (this->should_kill && this->should_kill()); })) {
return;
}
}
while (1) {
if (polling_time.count() > 0) {
std::unique_lock lck(kill_thread_mutex);
if (kill_thread_cv.wait_for(lck, polling_time, [this]{ return this->kill_thread || (this->should_kill && this->should_kill()); })) {
return;
}
}
if (thread_job(data)) { // job is done
return;
}
}
}
bool KillableWorker::start(void *data)
{
if (!thread_job) return false; // no work to do
if (thread_obj.joinable()) return true; // alrady spawned
kill_thread = false;
thread_obj = std::thread([this, data] { thread_proc(data); });
return true;
}
void KillableWorker::kill()
{
if (!thread_job || !thread_obj.joinable()) return; // already killed
{
std::lock_guard lk(kill_thread_mutex);
kill_thread = true;
}
kill_thread_cv.notify_one();
thread_obj.join();
}
}
static bool create_dir_impl(std::filesystem::path &dirpath)
{
if (std::filesystem::is_directory(dirpath))
{
return true;
}
else if (std::filesystem::exists(dirpath)) // a file, we can't do anything
{
return false;
}
return std::filesystem::create_directories(dirpath);
}
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bool common_helpers::create_dir(const std::string_view &filepath)
{
std::filesystem::path parent(std::filesystem::u8path(filepath).parent_path());
return create_dir_impl(parent);
}
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bool common_helpers::create_dir(const std::wstring_view &filepath)
{
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std::filesystem::path parent(std::filesystem::path(filepath).parent_path());
return create_dir_impl(parent);
}
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void common_helpers::write(std::ofstream &file, const std::string_view &data)
{
if (!file.is_open()) {
return;
}
file << data << std::endl;
}
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std::wstring common_helpers::str_to_w(const std::string_view &str)
{
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if (str.empty()) return std::wstring();
auto cvt_state = std::mbstate_t();
const char* src = &str[0];
size_t conversion_bytes = std::mbsrtowcs(nullptr, &src, 0, &cvt_state);
std::wstring res(conversion_bytes + 1, L'\0');
std::mbsrtowcs(&res[0], &src, res.size(), &cvt_state);
return res.substr(0, conversion_bytes);
}
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std::string common_helpers::wstr_to_a(const std::wstring_view &wstr)
{
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if (wstr.empty()) return std::string();
auto cvt_state = std::mbstate_t();
const wchar_t* src = &wstr[0];
size_t conversion_bytes = std::wcsrtombs(nullptr, &src, 0, &cvt_state);
std::string res(conversion_bytes + 1, '\0');
std::wcsrtombs(&res[0], &src, res.size(), &cvt_state);
return res.substr(0, conversion_bytes);
}
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bool common_helpers::starts_with_i(const std::string_view &target, const std::string_view &query)
{
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if (target.size() < query.size()) {
return false;
}
return str_cmp_insensitive(target.substr(0, query.size()), query);
}
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bool common_helpers::starts_with_i(const std::wstring_view &target, const std::wstring_view &query)
{
if (target.size() < query.size()) {
return false;
}
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return str_cmp_insensitive(target.substr(0, query.size()), query);
}
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bool common_helpers::ends_with_i(const std::string_view &target, const std::string_view &query)
{
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if (target.size() < query.size()) {
return false;
}
const auto target_offset = target.length() - query.length();
return str_cmp_insensitive(target.substr(target_offset), query);
}
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bool common_helpers::ends_with_i(const std::wstring_view &target, const std::wstring_view &query)
{
if (target.size() < query.size()) {
return false;
}
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const auto target_offset = target.length() - query.length();
return str_cmp_insensitive(target.substr(target_offset), query);
}
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std::string common_helpers::string_strip(const std::string_view &str)
{
static constexpr const char whitespaces[] = " \t\r\n";
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if (str.empty()) return {};
size_t start = str.find_first_not_of(whitespaces);
size_t end = str.find_last_not_of(whitespaces);
if (start == std::string::npos) return {};
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if (start == end) { // happens when string is 1 char
auto c = str[start];
for (auto c_white = whitespaces; *c_white; ++c_white) {
if (c == *c_white) return {};
}
}
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return std::string(str.substr(start, end - start + 1));
}
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std::string common_helpers::uint8_vector_to_hex_string(const std::vector<uint8_t> &v)
{
std::string result{};
result.reserve(v.size() * 2); // two digits per character
static constexpr const char hex[] = "0123456789ABCDEF";
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for (uint8_t c : v) {
result.push_back(hex[c / 16]);
result.push_back(hex[c % 16]);
}
return result;
}
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bool common_helpers::str_cmp_insensitive(const std::string_view &str1, const std::string_view &str2)
{
if (str1.size() != str2.size()) return false;
return std::equal(str1.begin(), str1.end(), str2.begin(), [](const char c1, const char c2){
return std::toupper(c1) == std::toupper(c2);
});
}
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bool common_helpers::str_cmp_insensitive(const std::wstring_view &str1, const std::wstring_view &str2)
{
if (str1.size() != str2.size()) return false;
return std::equal(str1.begin(), str1.end(), str2.begin(), [](const wchar_t c1, const wchar_t c2){
return std::toupper(c1) == std::toupper(c2);
});
}
std::string common_helpers::ascii_to_lowercase(std::string data) {
std::transform(data.begin(), data.end(), data.begin(),
[](char c){ return std::tolower(c); });
return data;
}
void common_helpers::thisThreadYieldFor(std::chrono::microseconds u)
{
const auto start = std::chrono::high_resolution_clock::now();
const auto end = start + u;
do {
std::this_thread::yield();
} while (std::chrono::high_resolution_clock::now() < end);
}
void common_helpers::consume_bom(std::ifstream &input)
{
if (!input.is_open()) return;
auto pos = input.tellg();
int bom[3]{};
bom[0] = input.get();
bom[1] = input.get();
bom[2] = input.get();
if (bom[0] != 0xEF || bom[1] != 0xBB || bom[2] != 0xBF) {
input.clear();
input.seekg(pos, std::ios::beg);
}
}
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std::string common_helpers::to_lower(const std::string_view &str)
{
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if (str.empty()) return {};
std::string _str(str.size(), '\0');
std::transform(str.begin(), str.end(), _str.begin(), [](char c) { return std::tolower(c); });
return _str;
}
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std::wstring common_helpers::to_lower(const std::wstring_view &wstr)
{
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if (wstr.empty()) return {};
std::wstring _wstr(wstr.size(), '\0');
std::transform(wstr.begin(), wstr.end(), _wstr.begin(), [](wchar_t c) { return std::tolower(c); });
return _wstr;
}
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std::string common_helpers::to_upper(const std::string_view &str)
{
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if (str.empty()) return {};
std::string _str(str.size(), '\0');
std::transform(str.begin(), str.end(), _str.begin(), [](char c) { return std::toupper(c); });
return _str;
}
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std::wstring common_helpers::to_upper(const std::wstring_view &wstr)
{
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if (wstr.empty()) return {};
std::wstring _wstr(wstr.size(), '\0');
std::transform(wstr.begin(), wstr.end(), _wstr.begin(), [](wchar_t c) { return std::toupper(c); });
return _wstr;
}
static std::filesystem::path to_absolute_impl(const std::filesystem::path &path, const std::filesystem::path &base)
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{
if (path.is_absolute()) {
return path;
}
return std::filesystem::absolute(base / path);
}
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std::string common_helpers::to_absolute(const std::string_view &path, const std::string_view &base)
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{
if (path.empty()) return {};
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auto path_abs = to_absolute_impl(
std::filesystem::u8path(path),
base.empty() ? std::filesystem::current_path() : std::filesystem::u8path(base)
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);
return path_abs.u8string();
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}
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std::wstring common_helpers::to_absolute(const std::wstring_view &path, const std::wstring_view &base)
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{
if (path.empty()) return {};
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auto path_abs = to_absolute_impl(
std::filesystem::path(path),
base.empty() ? std::filesystem::current_path() : std::filesystem::path(base)
);
return path_abs.wstring();
}
bool common_helpers::file_exist(const std::filesystem::path &filepath)
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{
if (std::filesystem::is_directory(filepath)) {
return false;
} else if (std::filesystem::exists(filepath)) {
return true;
}
return false;
}
bool common_helpers::file_exist(const std::string &filepath)
{
if (filepath.empty()) return false;
return file_exist(std::filesystem::u8path(filepath));
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}
bool common_helpers::file_exist(const std::wstring &filepath)
{
if (filepath.empty()) return false;
return file_exist(std::filesystem::path(filepath));
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}
bool common_helpers::file_size(const std::filesystem::path &filepath, size_t &size)
{
if (common_helpers::file_exist(filepath)) {
size = static_cast<size_t>(std::filesystem::file_size(filepath));
return true;
}
return false;
}
bool common_helpers::file_size(const std::string &filepath, size_t &size)
{
return file_size(std::filesystem::u8path(filepath), size);
}
bool common_helpers::file_size(const std::wstring &filepath, size_t &size)
{
return file_size(std::filesystem::path(filepath), size);
}
bool common_helpers::dir_exist(const std::filesystem::path &dirpath)
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{
if (std::filesystem::is_directory(dirpath)) {
return true;
}
return false;
}
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bool common_helpers::dir_exist(const std::string &dirpath)
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{
if (dirpath.empty()) return false;
return dir_exist(std::filesystem::u8path(dirpath));
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}
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bool common_helpers::dir_exist(const std::wstring &dirpath)
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{
if (dirpath.empty()) return false;
return dir_exist(std::filesystem::path(dirpath));
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}
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size_t common_helpers::rand_number(size_t max)
{
// https://en.cppreference.com/w/cpp/numeric/random/uniform_int_distribution
std::random_device rd{}; // a seed source for the random number engine
std::mt19937 gen(rd()); // mersenne_twister_engine seeded with rd()
std::uniform_int_distribution<size_t> distrib(0, max);
return distrib(gen);
}
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std::string common_helpers::get_utc_time()
{
// https://en.cppreference.com/w/cpp/chrono/c/strftime
std::time_t time = std::time({});
std::tm utc_time{};
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bool is_ok = false;
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#if defined(__linux__) || defined(linux)
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{
auto utc_ptr = std::gmtime(&time);
if (utc_ptr) {
utc_time = *utc_ptr;
is_ok = true;
}
}
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#else
is_ok = !gmtime_s(&utc_time, &time);
#endif
std::string time_str(4 +1 +2 +1 +2 +3 +2 +1 +2 +1 +2 +1, '\0');
if (is_ok) {
constexpr const static char fmt[] = "%Y/%m/%d - %H:%M:%S";
size_t chars = std::strftime(&time_str[0], time_str.size(), fmt, &utc_time);
time_str.resize(chars);
}
return time_str;
}