1 /**
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements.  See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership.  The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the
7  * "License"); you may not use this file except in compliance
8  * with the License.  You may obtain a copy of the License at
9  *
10  *     http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 
19 package org.apache.hadoop.record.compiler;
20 
21 /**
22  * Code generator for "byte" type.
23  */
24 public class JByte extends JType {
25 
26   class JavaByte extends JavaType {
27 
JavaByte()28     JavaByte() {
29       super("byte", "Byte", "Byte", "TypeID.RIOType.BYTE");
30     }
31 
getTypeIDObjectString()32     String getTypeIDObjectString() {
33       return "org.apache.hadoop.record.meta.TypeID.ByteTypeID";
34     }
35 
genSlurpBytes(CodeBuffer cb, String b, String s, String l)36     void genSlurpBytes(CodeBuffer cb, String b, String s, String l) {
37       cb.append("{\n");
38       cb.append("if ("+l+"<1) {\n");
39       cb.append("throw new java.io.IOException(\"Byte is exactly 1 byte."+
40                 " Provided buffer is smaller.\");\n");
41       cb.append("}\n");
42       cb.append(s+"++; "+l+"--;\n");
43       cb.append("}\n");
44     }
45 
genCompareBytes(CodeBuffer cb)46     void genCompareBytes(CodeBuffer cb) {
47       cb.append("{\n");
48       cb.append("if (l1<1 || l2<1) {\n");
49       cb.append("throw new java.io.IOException(\"Byte is exactly 1 byte."+
50                 " Provided buffer is smaller.\");\n");
51       cb.append("}\n");
52       cb.append("if (b1[s1] != b2[s2]) {\n");
53       cb.append("return (b1[s1]<b2[s2])?-1:0;\n");
54       cb.append("}\n");
55       cb.append("s1++; s2++; l1--; l2--;\n");
56       cb.append("}\n");
57     }
58   }
59 
60   class CppByte extends CppType {
61 
CppByte()62     CppByte() {
63       super("int8_t");
64     }
65 
getTypeIDObjectString()66     String getTypeIDObjectString() {
67       return "new ::hadoop::TypeID(::hadoop::RIOTYPE_BYTE)";
68     }
69   }
70 
JByte()71   public JByte() {
72     setJavaType(new JavaByte());
73     setCppType(new CppByte());
74     setCType(new CType());
75   }
76 
getSignature()77   String getSignature() {
78     return "b";
79   }
80 }
81