ladybird/AK/Random.h
Diego Iastrubni 18257604eb Lagom: Win32 support baby steps
This is the initial port of Lagom to win32. This will enable developers
to use Lagom as an alternative to vanilla STL/StandardC++Library - which
gives a much richer environment (think QtCore - but modern).

My main incentive - is to have a native Windows Ladybird working.

I am starting with AK, which does not yet fully compile (on mingw). When
AK is compiling (currently fails building StringBuffer.cpp) - I will
continue to LibCore and then the rest of the user space libraries
(excluding the GUI, which will be another different effort).

Most of the code is happily stollen from Andrew Kaster's fork - he
deserves the credit.

Co-authored-by: Andrew Kaster <akaster@serenityos.org>
2022-09-29 17:01:22 +01:00

60 lines
1.1 KiB
C++

/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Platform.h>
#include <AK/Types.h>
#if defined(__serenity__) || defined(AK_OS_ANDROID)
# include <stdlib.h>
#endif
#if defined(__unix__)
# include <unistd.h>
#endif
#if defined(AK_OS_MACOS)
# include <sys/random.h>
#endif
#if defined(AK_OS_WINDOWS)
# include <random>
# include <unistd.h>
#endif
namespace AK {
inline void fill_with_random([[maybe_unused]] void* buffer, [[maybe_unused]] size_t length)
{
#if defined(__serenity__) || defined(AK_OS_ANDROID)
arc4random_buf(buffer, length);
#elif defined(OSS_FUZZ)
#elif defined(__unix__) or defined(AK_OS_MACOS)
[[maybe_unused]] int rc = getentropy(buffer, length);
#else
char* char_buffer = static_cast<char*>(buffer);
for (size_t i = 0; i < length; i++) {
char_buffer[i] = std::rand();
}
#endif
}
template<typename T>
inline T get_random()
{
T t;
fill_with_random(&t, sizeof(T));
return t;
}
u32 get_random_uniform(u32 max_bounds);
}
using AK::fill_with_random;
using AK::get_random;
using AK::get_random_uniform;