JFloat.java
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上传日期:2018-01-08
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文件大小:3k
- /**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you 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.
- */
- package org.apache.hadoop.record.compiler;
- /**
- */
- public class JFloat extends JType {
-
- class JavaFloat extends JavaType {
-
- JavaFloat() {
- super("float", "Float", "Float", "TypeID.RIOType.FLOAT");
- }
-
- String getTypeIDObjectString() {
- return "org.apache.hadoop.record.meta.TypeID.FloatTypeID";
- }
- void genHashCode(CodeBuffer cb, String fname) {
- cb.append(Consts.RIO_PREFIX + "ret = Float.floatToIntBits("+fname+");n");
- }
-
- void genSlurpBytes(CodeBuffer cb, String b, String s, String l) {
- cb.append("{n");
- cb.append("if ("+l+"<4) {n");
- cb.append("throw new java.io.IOException("Float is exactly 4 bytes."+
- " Provided buffer is smaller.");n");
- cb.append("}n");
- cb.append(s+"+=4; "+l+"-=4;n");
- cb.append("}n");
- }
-
- void genCompareBytes(CodeBuffer cb) {
- cb.append("{n");
- cb.append("if (l1<4 || l2<4) {n");
- cb.append("throw new java.io.IOException("Float is exactly 4 bytes."+
- " Provided buffer is smaller.");n");
- cb.append("}n");
- cb.append("float f1 = org.apache.hadoop.record.Utils.readFloat(b1, s1);n");
- cb.append("float f2 = org.apache.hadoop.record.Utils.readFloat(b2, s2);n");
- cb.append("if (f1 != f2) {n");
- cb.append("return ((f1-f2) < 0) ? -1 : 0;n");
- cb.append("}n");
- cb.append("s1+=4; s2+=4; l1-=4; l2-=4;n");
- cb.append("}n");
- }
- }
- class CppFloat extends CppType {
-
- CppFloat() {
- super("float");
- }
-
- String getTypeIDObjectString() {
- return "new ::hadoop::TypeID(::hadoop::RIOTYPE_FLOAT)";
- }
- }
- /** Creates a new instance of JFloat */
- public JFloat() {
- setJavaType(new JavaFloat());
- setCppType(new CppFloat());
- setCType(new CType());
- }
-
- String getSignature() {
- return "f";
- }
- }