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Support for floating point conversions and tests

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Floats and doubles can now be read from strings, using the C standard library
functions for this purpose (strtof and strtod).  The code also relies on
standard library functions to implement isNaN() and isInfinite()
This commit is contained in:
Eric Scharff
2008-02-28 08:35:16 -07:00
parent 73e7bfc1dc
commit 0d5b7bd126
3 changed files with 118 additions and 4 deletions
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64
classpath/java-lang.cpp
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@ -431,6 +431,70 @@ Java_java_lang_System_doMapLibraryName(JNIEnv* e, jclass, jstring name)
return r;
}
extern "C" JNIEXPORT jboolean JNICALL
Java_java_lang_Double_isInfinite(JNIEnv*, jclass, jdouble val)
{
return !isfinite(val);
}
extern "C" JNIEXPORT jboolean JNICALL
Java_java_lang_Double_isNaN(JNIEnv*, jclass, jdouble val)
{
return isnan(val);
}
extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Double_doubleFromString(JNIEnv*e, jclass, jstring s,
jintArray numDoublesRead)
{
const char* chars = e->GetStringUTFChars(s, 0);
double d = 0.0;
int numRead = 0;
if (chars) {
char* lastRead;
d = strtod(chars, &lastRead);
if ((lastRead != chars) && ((chars + strlen(chars)) == lastRead)) {
numRead = 1;
}
e->ReleaseStringUTFChars(s, chars);
}
e->SetIntArrayRegion(numDoublesRead, 0, 1, &numRead);
return d;
}
extern "C" JNIEXPORT jboolean JNICALL
Java_java_lang_Float_isInfinite(JNIEnv*, jclass, jfloat val)
{
return !isfinite(val);
}
extern "C" JNIEXPORT jboolean JNICALL
Java_java_lang_Float_isNaN(JNIEnv*, jclass, jfloat val)
{
return isnan(val);
}
extern "C" JNIEXPORT jfloat JNICALL
Java_java_lang_Float_floatFromString(JNIEnv*e, jclass, jstring s,
jintArray numFloatsRead)
{
const char* chars = e->GetStringUTFChars(s, 0);
float f = 0.0;
int numRead = 0;
if (chars) {
char* lastRead;
f = strtof(chars, &lastRead);
if ((lastRead != chars) && ((chars + strlen(chars)) == lastRead)) {
numRead = 1;
}
e->ReleaseStringUTFChars(s, chars);
}
e->SetIntArrayRegion(numFloatsRead, 0, 1, &numRead);
return f;
}
extern "C" JNIEXPORT jdouble JNICALL
Java_java_lang_Math_sin(JNIEnv*, jclass, jdouble val)
{