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Implemented java.lang.Math.random() properly (seeding the random number

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on first use, and then using the system random number generator)
This commit is contained in:
Eric Scharff
2007-11-28 17:06:04 -07:00
parent d24b633665
commit 51c198f0f0
2 changed files with 32 additions and 1 deletions
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20
classpath/java-lang.cpp
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@ -136,6 +136,26 @@ Java_java_lang_Math_pow(JNIEnv*, jclass, jdouble val, jdouble exp)
return pow(val, exp);
}
extern "C" JNIEXPORT void JNICALL
Java_java_lang_Math_natRandomInitialize(JNIEnv*, jclass, jlong val)
{
#ifdef WIN32
srand(val);
#else
srand48(val);
#endif
}
extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_natRandom(JNIEnv*, jclass)
{
#ifdef WIN32
return rand();
#else
return drand48();
#endif
}
extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_floor(JNIEnv*, jclass, jdouble val)
{