Changeset 53928 in webkit for trunk/JavaScriptCore/wtf/RandomNumber.cpp

Timestamp:

Jan 27, 2010, 6:07:59 AM (15 years ago)

Author:

[email protected]

Message:

2010-01-27 Kwang Yul Seo <​[email protected]>

Reviewed by Eric Seidel.

[BREWMP] Port WTF's randomNumber
​https://bugs.webkit.org/show_bug.cgi?id=33566

Use GETRAND to generate 4 byte random byte sequence to implement
weakRandomNumber. Create a secure random number generator with
AEECLSID_RANDOM to implement randomNumber.

• wtf/RandomNumber.cpp: (WTF::weakRandomNumber): (WTF::randomNumber):

File:

• trunk/JavaScriptCore/wtf/RandomNumber.cpp (modified) (3 diffs)

trunk/JavaScriptCore/wtf/RandomNumber.cpp

@@ -41 +41 @@
 #endif
 
+#if PLATFORM(BREWMP)
+#include <AEEAppGen.h>
+#include <AEESource.h>
+#include <AEEStdLib.h>
+#endif
+
 namespace WTF {
 
@@ -48 +54 @@
     // rand_s is incredibly slow on windows so we fall back on rand for Math.random
     return (rand() + (rand() / (RAND_MAX + 1.0))) / (RAND_MAX + 1.0);
+#elif PLATFORM(BREWMP)
+    uint32_t bits;
+    GETRAND(reinterpret_cast<byte*>(&bits), sizeof(uint32_t));
+    return static_cast<double>(bits) / (static_cast<double>(std::numeric_limits<uint32_t>::max()) + 1.0);
 #else
     return randomNumber();
@@ -100 +110 @@
     fullRandom &= (1LL << 53) - 1;
     return static_cast<double>(fullRandom)/static_cast<double>(1LL << 53);
+#elif PLATFORM(BREWMP)
+    uint32_t bits;
+    ISource* randomSource;
+
+    IShell* shell = reinterpret_cast<AEEApplet*>(GETAPPINSTANCE())->m_pIShell;
+    ISHELL_CreateInstance(shell, AEECLSID_RANDOM, reinterpret_cast<void**>(&randomSource));
+    ISOURCE_Read(randomSource, reinterpret_cast<char*>(&bits), 4);
+    ISOURCE_Release(randomSource);
+
+    return static_cast<double>(bits) / (static_cast<double>(std::numeric_limits<uint32_t>::max()) + 1.0);
 #else
     uint32_t part1 = rand() & (RAND_MAX - 1);