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LongDouble.c
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LongDouble.c
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/*
* Copyright (C) 2007, 2008 Wayne Meissner
*
* This file is part of jffi.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*
* Alternatively, you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this work. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#ifdef __sun
# include <alloca.h>
#endif
#include <stdint.h>
#include <stdbool.h>
#include <jni.h>
#include "jffi.h"
#include "Exception.h"
#include "com_kenai_jffi_Foreign.h"
static void
jffi_encodeLongDouble(JNIEnv *env, long double ld, jbyteArray array, jint arrayOffset, jint arrayLength)
{
if (arrayLength != sizeof(ld)) {
throwException(env, Runtime, "array size != sizeof(long double)");
return;
}
(*env)->SetByteArrayRegion(env, array, arrayOffset, arrayLength, (jbyte *) &ld);
}
static long double
jffi_decodeLongDouble(JNIEnv *env, jbyteArray array, jint arrayOffset, jint arrayLength)
{
long double ld;
if (arrayLength != sizeof(ld)) {
throwException(env, Runtime, "array size != sizeof(long double)");
return 0.0;
}
(*env)->GetByteArrayRegion(env, array, arrayOffset, arrayLength, (jbyte *) &ld);
return ld;
}
/*
* Class: com_kenai_jffi_Foreign
* Method: longDoubleFromEngineeringString
* Signature: (Ljava/lang/String;[BII)V
*/
JNIEXPORT void JNICALL
Java_com_kenai_jffi_Foreign_longDoubleFromString(JNIEnv *env, jobject self, jstring str,
jbyteArray array, jint arrayOffset, jint arrayLength)
{
long double ld;
char* tmp;
jsize len;
len = (*env)->GetStringUTFLength(env, str);
tmp = alloca(len + 1);
(*env)->GetStringUTFRegion(env, str, 0, len, tmp);
ld = strtold(tmp, NULL);
jffi_encodeLongDouble(env, ld, array, arrayOffset, arrayLength);
}
static inline jstring
jffi_longDoubleToString(JNIEnv *env,
jbyteArray array, jint arrayOffset, jint arrayLength, const char * const fmt)
{
char tmp[256];
sprintf(tmp, fmt, jffi_decodeLongDouble(env, array, arrayOffset, arrayLength));
return (*env)->NewStringUTF(env, tmp);
}
/*
* Class: com_kenai_jffi_Foreign
* Method: longDoubleToEngineeringString
* Signature: ([BII)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL
Java_com_kenai_jffi_Foreign_longDoubleToEngineeringString(JNIEnv *env, jobject self,
jbyteArray array, jint arrayOffset, jint arrayLength)
{
return jffi_longDoubleToString(env, array, arrayOffset, arrayLength, "%.35Le");
}
/*
* Class: com_kenai_jffi_Foreign
* Method: longDoubleToPlainString
* Signature: ([BII)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL
Java_com_kenai_jffi_Foreign_longDoubleToPlainString(JNIEnv *env, jobject self,
jbyteArray array, jint arrayOffset, jint arrayLength)
{
return jffi_longDoubleToString(env, array, arrayOffset, arrayLength, "%.35Lf");
}
/*
* Class: com_kenai_jffi_Foreign
* Method: longDoubleToString
* Signature: ([BII)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL
Java_com_kenai_jffi_Foreign_longDoubleToString(JNIEnv *env, jobject self,
jbyteArray array, jint arrayOffset, jint arrayLength)
{
return jffi_longDoubleToString(env, array, arrayOffset, arrayLength, "%.35Lg");
}
/*
* Class: com_kenai_jffi_Foreign
* Method: longDoubleFromDouble
* Signature: (D[BII)V
*/
JNIEXPORT void JNICALL
Java_com_kenai_jffi_Foreign_longDoubleFromDouble(JNIEnv *env, jobject self, jdouble doubleValue,
jbyteArray array, jint arrayOffset, jint arrayLength)
{
jffi_encodeLongDouble(env, doubleValue, array, arrayOffset, arrayLength);
}
/*
* Class: com_kenai_jffi_Foreign
* Method: longDoubleToDouble
* Signature: ([BII)D
*/
JNIEXPORT jdouble JNICALL
Java_com_kenai_jffi_Foreign_longDoubleToDouble(JNIEnv *env, jobject self,
jbyteArray array, jint arrayOffset, jint arrayLength)
{
return jffi_decodeLongDouble(env, array, arrayOffset, arrayLength);
}