author | rriggs |
Fri, 09 Nov 2018 13:28:16 -0500 | |
changeset 52478 | b915bd68d907 |
parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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#include "jni_util.h" |
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#include "jdk_util.h" |
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#include "java_lang_Float.h" |
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#include "java_lang_Double.h" |
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#include "java_io_ObjectOutputStream.h" |
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/* |
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* Class: java_io_ObjectOutputStream |
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* Method: floatsToBytes |
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* Signature: ([FI[BII)V |
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* |
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* Convert nfloats float values to their byte representations. Float values |
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* are read from array src starting at offset srcpos and written to array |
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* dst starting at offset dstpos. |
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*/ |
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JNIEXPORT void JNICALL |
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Java_java_io_ObjectOutputStream_floatsToBytes(JNIEnv *env, |
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jclass this, |
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jfloatArray src, |
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jint srcpos, |
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jbyteArray dst, |
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jint dstpos, |
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jint nfloats) |
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{ |
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union { |
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int i; |
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float f; |
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} u; |
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jfloat *floats; |
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jbyte *bytes; |
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jsize srcend; |
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jint ival; |
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float fval; |
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if (nfloats == 0) |
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return; |
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/* fetch source array */ |
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if (src == NULL) { |
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JNU_ThrowNullPointerException(env, NULL); |
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return; |
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} |
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floats = (*env)->GetPrimitiveArrayCritical(env, src, NULL); |
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if (floats == NULL) /* exception thrown */ |
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return; |
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/* fetch dest array */ |
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if (dst == NULL) { |
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(*env)->ReleasePrimitiveArrayCritical(env, src, floats, JNI_ABORT); |
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JNU_ThrowNullPointerException(env, NULL); |
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return; |
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} |
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bytes = (*env)->GetPrimitiveArrayCritical(env, dst, NULL); |
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if (bytes == NULL) { /* exception thrown */ |
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(*env)->ReleasePrimitiveArrayCritical(env, src, floats, JNI_ABORT); |
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return; |
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} |
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/* do conversion */ |
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srcend = srcpos + nfloats; |
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for ( ; srcpos < srcend; srcpos++) { |
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fval = (float) floats[srcpos]; |
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if (ISNANF(fval)) { /* collapse NaNs */ |
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ival = 0x7fc00000; |
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} else { |
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u.f = fval; |
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ival = (jint) u.i; |
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} |
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bytes[dstpos++] = (ival >> 24) & 0xFF; |
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bytes[dstpos++] = (ival >> 16) & 0xFF; |
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bytes[dstpos++] = (ival >> 8) & 0xFF; |
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bytes[dstpos++] = (ival >> 0) & 0xFF; |
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} |
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(*env)->ReleasePrimitiveArrayCritical(env, src, floats, JNI_ABORT); |
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(*env)->ReleasePrimitiveArrayCritical(env, dst, bytes, 0); |
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} |
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/* |
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* Class: java_io_ObjectOutputStream |
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* Method: doublesToBytes |
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* Signature: ([DI[BII)V |
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* |
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* Convert ndoubles double values to their byte representations. Double |
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* values are read from array src starting at offset srcpos and written to |
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* array dst starting at offset dstpos. |
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*/ |
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JNIEXPORT void JNICALL |
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Java_java_io_ObjectOutputStream_doublesToBytes(JNIEnv *env, |
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jclass this, |
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jdoubleArray src, |
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jint srcpos, |
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jbyteArray dst, |
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jint dstpos, |
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jint ndoubles) |
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{ |
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union { |
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jlong l; |
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double d; |
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} u; |
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jdouble *doubles; |
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jbyte *bytes; |
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jsize srcend; |
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jdouble dval; |
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jlong lval; |
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if (ndoubles == 0) |
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return; |
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/* fetch source array */ |
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if (src == NULL) { |
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JNU_ThrowNullPointerException(env, NULL); |
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return; |
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} |
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doubles = (*env)->GetPrimitiveArrayCritical(env, src, NULL); |
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if (doubles == NULL) /* exception thrown */ |
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return; |
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/* fetch dest array */ |
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if (dst == NULL) { |
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(*env)->ReleasePrimitiveArrayCritical(env, src, doubles, JNI_ABORT); |
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JNU_ThrowNullPointerException(env, NULL); |
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return; |
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} |
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bytes = (*env)->GetPrimitiveArrayCritical(env, dst, NULL); |
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if (bytes == NULL) { /* exception thrown */ |
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(*env)->ReleasePrimitiveArrayCritical(env, src, doubles, JNI_ABORT); |
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return; |
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} |
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/* do conversion */ |
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srcend = srcpos + ndoubles; |
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for ( ; srcpos < srcend; srcpos++) { |
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dval = doubles[srcpos]; |
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dxu
parents:
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diff
changeset
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if (ISNAND((double) dval)) { /* collapse NaNs */ |
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lval = jint_to_jlong(0x7ff80000); |
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lval = jlong_shl(lval, 32); |
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} else { |
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jdouble_to_jlong_bits(&dval); |
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u.d = (double) dval; |
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lval = u.l; |
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} |
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bytes[dstpos++] = (lval >> 56) & 0xFF; |
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bytes[dstpos++] = (lval >> 48) & 0xFF; |
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bytes[dstpos++] = (lval >> 40) & 0xFF; |
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bytes[dstpos++] = (lval >> 32) & 0xFF; |
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bytes[dstpos++] = (lval >> 24) & 0xFF; |
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bytes[dstpos++] = (lval >> 16) & 0xFF; |
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bytes[dstpos++] = (lval >> 8) & 0xFF; |
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bytes[dstpos++] = (lval >> 0) & 0xFF; |
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} |
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(*env)->ReleasePrimitiveArrayCritical(env, src, doubles, JNI_ABORT); |
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(*env)->ReleasePrimitiveArrayCritical(env, dst, bytes, 0); |
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} |