| /* |
| * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "jni_util.h" |
| #include "jdk_util.h" |
| |
| #include "java_lang_Float.h" |
| #include "java_lang_Double.h" |
| #include "java_io_ObjectOutputStream.h" |
| |
| /* |
| * Class: java_io_ObjectOutputStream |
| * Method: floatsToBytes |
| * Signature: ([FI[BII)V |
| * |
| * Convert nfloats float values to their byte representations. Float values |
| * are read from array src starting at offset srcpos and written to array |
| * dst starting at offset dstpos. |
| */ |
| JNIEXPORT void JNICALL |
| Java_java_io_ObjectOutputStream_floatsToBytes(JNIEnv *env, |
| jclass this, |
| jfloatArray src, |
| jint srcpos, |
| jbyteArray dst, |
| jint dstpos, |
| jint nfloats) |
| { |
| union { |
| int i; |
| float f; |
| } u; |
| jfloat *floats; |
| jbyte *bytes; |
| jsize srcend; |
| jint ival; |
| float fval; |
| |
| if (nfloats == 0) |
| return; |
| |
| /* fetch source array */ |
| if (src == NULL) { |
| JNU_ThrowNullPointerException(env, NULL); |
| return; |
| } |
| floats = (*env)->GetPrimitiveArrayCritical(env, src, NULL); |
| if (floats == NULL) /* exception thrown */ |
| return; |
| |
| /* fetch dest array */ |
| if (dst == NULL) { |
| (*env)->ReleasePrimitiveArrayCritical(env, src, floats, JNI_ABORT); |
| JNU_ThrowNullPointerException(env, NULL); |
| return; |
| } |
| bytes = (*env)->GetPrimitiveArrayCritical(env, dst, NULL); |
| if (bytes == NULL) { /* exception thrown */ |
| (*env)->ReleasePrimitiveArrayCritical(env, src, floats, JNI_ABORT); |
| return; |
| } |
| |
| /* do conversion */ |
| srcend = srcpos + nfloats; |
| for ( ; srcpos < srcend; srcpos++) { |
| fval = (float) floats[srcpos]; |
| if (ISNANF(fval)) { /* collapse NaNs */ |
| ival = 0x7fc00000; |
| } else { |
| u.f = fval; |
| ival = (jint) u.i; |
| } |
| bytes[dstpos++] = (ival >> 24) & 0xFF; |
| bytes[dstpos++] = (ival >> 16) & 0xFF; |
| bytes[dstpos++] = (ival >> 8) & 0xFF; |
| bytes[dstpos++] = (ival >> 0) & 0xFF; |
| } |
| |
| (*env)->ReleasePrimitiveArrayCritical(env, src, floats, JNI_ABORT); |
| (*env)->ReleasePrimitiveArrayCritical(env, dst, bytes, 0); |
| } |
| |
| /* |
| * Class: java_io_ObjectOutputStream |
| * Method: doublesToBytes |
| * Signature: ([DI[BII)V |
| * |
| * Convert ndoubles double values to their byte representations. Double |
| * values are read from array src starting at offset srcpos and written to |
| * array dst starting at offset dstpos. |
| */ |
| JNIEXPORT void JNICALL |
| Java_java_io_ObjectOutputStream_doublesToBytes(JNIEnv *env, |
| jclass this, |
| jdoubleArray src, |
| jint srcpos, |
| jbyteArray dst, |
| jint dstpos, |
| jint ndoubles) |
| { |
| union { |
| jlong l; |
| double d; |
| } u; |
| jdouble *doubles; |
| jbyte *bytes; |
| jsize srcend; |
| jdouble dval; |
| jlong lval; |
| |
| if (ndoubles == 0) |
| return; |
| |
| /* fetch source array */ |
| if (src == NULL) { |
| JNU_ThrowNullPointerException(env, NULL); |
| return; |
| } |
| doubles = (*env)->GetPrimitiveArrayCritical(env, src, NULL); |
| if (doubles == NULL) /* exception thrown */ |
| return; |
| |
| /* fetch dest array */ |
| if (dst == NULL) { |
| (*env)->ReleasePrimitiveArrayCritical(env, src, doubles, JNI_ABORT); |
| JNU_ThrowNullPointerException(env, NULL); |
| return; |
| } |
| bytes = (*env)->GetPrimitiveArrayCritical(env, dst, NULL); |
| if (bytes == NULL) { /* exception thrown */ |
| (*env)->ReleasePrimitiveArrayCritical(env, src, doubles, JNI_ABORT); |
| return; |
| } |
| |
| /* do conversion */ |
| srcend = srcpos + ndoubles; |
| for ( ; srcpos < srcend; srcpos++) { |
| dval = doubles[srcpos]; |
| if (ISNAND((double) dval)) { /* collapse NaNs */ |
| lval = jint_to_jlong(0x7ff80000); |
| lval = jlong_shl(lval, 32); |
| } else { |
| jdouble_to_jlong_bits(&dval); |
| u.d = (double) dval; |
| lval = u.l; |
| } |
| bytes[dstpos++] = (lval >> 56) & 0xFF; |
| bytes[dstpos++] = (lval >> 48) & 0xFF; |
| bytes[dstpos++] = (lval >> 40) & 0xFF; |
| bytes[dstpos++] = (lval >> 32) & 0xFF; |
| bytes[dstpos++] = (lval >> 24) & 0xFF; |
| bytes[dstpos++] = (lval >> 16) & 0xFF; |
| bytes[dstpos++] = (lval >> 8) & 0xFF; |
| bytes[dstpos++] = (lval >> 0) & 0xFF; |
| } |
| |
| (*env)->ReleasePrimitiveArrayCritical(env, src, doubles, JNI_ABORT); |
| (*env)->ReleasePrimitiveArrayCritical(env, dst, bytes, 0); |
| } |