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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2018, Google Inc.
*
* utils.h - Miscellaneous utility functions
*/
#ifndef __LIBCAMERA_UTILS_H__
#define __LIBCAMERA_UTILS_H__
#include <algorithm>
#include <chrono>
#include <memory>
#include <ostream>
#include <string>
#include <sys/time.h>
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
namespace libcamera {
namespace utils {
const char *basename(const char *path);
/* C++11 doesn't provide std::make_unique */
template<typename T, typename... Args>
std::unique_ptr<T> make_unique(Args&&... args)
{
return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
}
char *secure_getenv(const char *name);
template<class InputIt1, class InputIt2>
unsigned int set_overlap(InputIt1 first1, InputIt1 last1,
InputIt2 first2, InputIt2 last2)
{
unsigned int count = 0;
while (first1 != last1 && first2 != last2) {
if (*first1 < *first2) {
++first1;
} else {
if (!(*first2 < *first1))
count++;
++first2;
}
}
return count;
}
/* C++11 doesn't provide std::clamp */
template <typename T>
const T& clamp(const T& v, const T& lo, const T& hi)
{
return std::max(lo, std::min(v, hi));
}
using clock = std::chrono::steady_clock;
using duration = std::chrono::steady_clock::duration;
using time_point = std::chrono::steady_clock::time_point;
struct timespec duration_to_timespec(const duration &value);
std::string time_point_to_string(const time_point &time);
#ifndef __DOXYGEN__
struct _hex {
uint64_t v;
unsigned int w;
};
std::basic_ostream<char, std::char_traits<char>> &
operator<<(std::basic_ostream<char, std::char_traits<char>> &stream, const _hex &h);
#endif
template<typename T>
_hex hex(T value, unsigned int width = 0);
#ifndef __DOXYGEN__
template<>
inline _hex hex<int32_t>(int32_t value, unsigned int width)
{
return { static_cast<uint64_t>(value), width ? width : 8 };
}
template<>
inline _hex hex<uint32_t>(uint32_t value, unsigned int width)
{
return { static_cast<uint64_t>(value), width ? width : 8 };
}
template<>
inline _hex hex<int64_t>(int64_t value, unsigned int width)
{
return { static_cast<uint64_t>(value), width ? width : 16 };
}
template<>
inline _hex hex<uint64_t>(uint64_t value, unsigned int width)
{
return { static_cast<uint64_t>(value), width ? width : 16 };
}
#endif
} /* namespace utils */
} /* namespace libcamera */
#endif /* __LIBCAMERA_UTILS_H__ */
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