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| author | Gunnar Sletta <gunnar@trolltech.com> | 2009-10-26 07:06:59 (GMT) |
|---|---|---|
| committer | Gunnar Sletta <gunnar@trolltech.com> | 2009-10-26 07:06:59 (GMT) |
| commit | 9a1ee410d24321e7eedaea6bb4f1b21fcc6fb427 (patch) | |
| tree | 37ae0ceb0eb9d4f74683b02bf3187cfd7f694c6c /src/3rdparty/webkit/JavaScriptCore/wtf/RandomNumber.cpp | |
| parent | 2c0921b667ec74df6ad3d749b30bb9b7c5843343 (diff) | |
| parent | 35c8033ff51ab6d0567e786b790b8cc49852803b (diff) | |
| download | Qt-9a1ee410d24321e7eedaea6bb4f1b21fcc6fb427.zip Qt-9a1ee410d24321e7eedaea6bb4f1b21fcc6fb427.tar.gz Qt-9a1ee410d24321e7eedaea6bb4f1b21fcc6fb427.tar.bz2 | |
Merge branch '4.6' of git@scm.dev.nokia.troll.no:qt/qt into 4.6
Diffstat (limited to 'src/3rdparty/webkit/JavaScriptCore/wtf/RandomNumber.cpp')
| -rw-r--r-- | src/3rdparty/webkit/JavaScriptCore/wtf/RandomNumber.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/JavaScriptCore/wtf/RandomNumber.cpp b/src/3rdparty/webkit/JavaScriptCore/wtf/RandomNumber.cpp index 0e6e208..52fb130 100644 --- a/src/3rdparty/webkit/JavaScriptCore/wtf/RandomNumber.cpp +++ b/src/3rdparty/webkit/JavaScriptCore/wtf/RandomNumber.cpp @@ -82,6 +82,23 @@ double randomNumber() return static_cast<double>(fullRandom)/static_cast<double>(1LL << 53); #elif PLATFORM(WINCE) return genrand_res53(); +#elif PLATFORM(WIN_OS) + 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); #else uint32_t part1 = rand() & (RAND_MAX - 1); uint32_t part2 = rand() & (RAND_MAX - 1); |