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https://github.com/Vita3K/Vita3K.git
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49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
// Vita3K emulator project
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// Copyright (C) 2021 Vita3K team
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#include "SceLibRng.h"
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#include <algorithm>
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#include <random>
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#define SCE_RNG_ERROR_INVALID_ARGUMENT 0x810C0000
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EXPORT(int, sceKernelGetRandomNumber, uint64_t *output, unsigned int size) {
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if (size > 64) {
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return RET_ERROR(SCE_RNG_ERROR_INVALID_ARGUMENT);
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}
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thread_local std::random_device dev;
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thread_local std::mt19937_64 mt(dev());
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thread_local auto rng = [&]() { return mt(); };
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int repeat = size / sizeof(uint64_t);
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int remain = size % sizeof(uint64_t);
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std::generate_n(output, repeat, rng);
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if (remain == 0) {
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return SCE_KERNEL_OK;
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}
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uint64_t value = rng();
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char *ptr = reinterpret_cast<char *>(&value);
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std::copy(ptr, ptr + remain, reinterpret_cast<char *>(&output[repeat]));
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return SCE_KERNEL_OK;
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}
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BRIDGE_IMPL(sceKernelGetRandomNumber)
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