diff options
Diffstat (limited to 'JavaScriptCore/wtf/RandomNumber.cpp')
-rw-r--r-- | JavaScriptCore/wtf/RandomNumber.cpp | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/JavaScriptCore/wtf/RandomNumber.cpp b/JavaScriptCore/wtf/RandomNumber.cpp deleted file mode 100644 index 7a9b6a8..0000000 --- a/JavaScriptCore/wtf/RandomNumber.cpp +++ /dev/null @@ -1,123 +0,0 @@ -/* - * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved. - * (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY - * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "config.h" -#include "RandomNumber.h" - -#include "RandomNumberSeed.h" - -#include <limits> -#include <limits.h> -#include <stdint.h> -#include <stdlib.h> - -#if OS(WINCE) -extern "C" { -#include "wince/mt19937ar.c" -} -#endif - -#if PLATFORM(BREWMP) -#include <AEEAppGen.h> -#include <AEESource.h> -#include <AEEStdLib.h> -#include <wtf/brew/RefPtrBrew.h> -#include <wtf/brew/ShellBrew.h> -#endif - -namespace WTF { - -double randomNumber() -{ -#if !ENABLE(JSC_MULTIPLE_THREADS) - static bool s_initialized = false; - if (!s_initialized) { - initializeRandomNumberGenerator(); - s_initialized = true; - } -#endif - -#if COMPILER(MSVC) && defined(_CRT_RAND_S) - uint32_t bits; - rand_s(&bits); - return static_cast<double>(bits) / (static_cast<double>(std::numeric_limits<uint32_t>::max()) + 1.0); -#elif OS(DARWIN) - uint32_t bits = arc4random(); - return static_cast<double>(bits) / (static_cast<double>(std::numeric_limits<uint32_t>::max()) + 1.0); -#elif OS(UNIX) - uint32_t part1 = random() & (RAND_MAX - 1); - uint32_t part2 = random() & (RAND_MAX - 1); - // random only provides 31 bits - uint64_t fullRandom = part1; - fullRandom <<= 31; - fullRandom |= part2; - - // Mask off the low 53bits - fullRandom &= (1LL << 53) - 1; - return static_cast<double>(fullRandom)/static_cast<double>(1LL << 53); -#elif OS(WINCE) - return genrand_res53(); -#elif OS(WINDOWS) - uint32_t part1 = rand() & (RAND_MAX - 1); - uint32_t part2 = rand() & (RAND_MAX - 1); - uint32_t part3 = rand() & (RAND_MAX - 1); - uint32_t part4 = rand() & (RAND_MAX - 1); - // rand only provides 15 bits on Win32 - uint64_t fullRandom = part1; - fullRandom <<= 15; - fullRandom |= part2; - fullRandom <<= 15; - fullRandom |= part3; - fullRandom <<= 15; - fullRandom |= part4; - - // Mask off the low 53bits - fullRandom &= (1LL << 53) - 1; - return static_cast<double>(fullRandom)/static_cast<double>(1LL << 53); -#elif PLATFORM(BREWMP) - uint32_t bits; - PlatformRefPtr<ISource> randomSource = createRefPtrInstance<ISource>(AEECLSID_RANDOM); - ISOURCE_Read(randomSource.get(), reinterpret_cast<char*>(&bits), 4); - - return static_cast<double>(bits) / (static_cast<double>(std::numeric_limits<uint32_t>::max()) + 1.0); -#else - uint32_t part1 = rand() & (RAND_MAX - 1); - uint32_t part2 = rand() & (RAND_MAX - 1); - // rand only provides 31 bits, and the low order bits of that aren't very random - // so we take the high 26 bits of part 1, and the high 27 bits of part2. - part1 >>= 5; // drop the low 5 bits - part2 >>= 4; // drop the low 4 bits - uint64_t fullRandom = part1; - fullRandom <<= 27; - fullRandom |= part2; - - // Mask off the low 53bits - fullRandom &= (1LL << 53) - 1; - return static_cast<double>(fullRandom)/static_cast<double>(1LL << 53); -#endif -} - -} |