author | Jaroslav Tulach <jaroslav.tulach@apidesign.org> |
Wed, 30 Oct 2013 17:15:23 +0100 | |
changeset 1392 | da9e5973e699 |
parent 772 | d382dacfd73f |
child 1787 | ea12a3bb4b33 |
permissions | -rw-r--r-- |
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/** |
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* Back 2 Browser Bytecode Translator |
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* Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org> |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, version 2 of the License. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. Look for COPYING file in the top folder. |
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* If not, see http://opensource.org/licenses/GPL-2.0. |
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*/ |
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package org.apidesign.vm4brwsr; |
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|
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final class VarType { |
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public static final int INTEGER = 0; |
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public static final int LONG = 1; |
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public static final int FLOAT = 2; |
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public static final int DOUBLE = 3; |
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public static final int REFERENCE = 4; |
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|
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public static final int LAST = REFERENCE; |
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|
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private VarType() { |
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} |
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|
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public static boolean isCategory2(final int varType) { |
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return (varType == LONG) || (varType == DOUBLE); |
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} |
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|
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public static int fromStackMapType(final int smType) { |
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switch (smType & 0xff) { |
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case ByteCodeParser.ITEM_Integer: |
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return VarType.INTEGER; |
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case ByteCodeParser.ITEM_Float: |
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return VarType.FLOAT; |
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case ByteCodeParser.ITEM_Double: |
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return VarType.DOUBLE; |
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case ByteCodeParser.ITEM_Long: |
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return VarType.LONG; |
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case ByteCodeParser.ITEM_Null: |
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case ByteCodeParser.ITEM_InitObject: |
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case ByteCodeParser.ITEM_Object: |
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case ByteCodeParser.ITEM_NewObject: |
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return VarType.REFERENCE; |
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|
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case ByteCodeParser.ITEM_Bogus: |
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/* unclear how to handle for now */ |
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default: |
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throw new IllegalStateException("Unhandled stack map type"); |
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} |
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} |
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|
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public static int fromConstantType(final byte constantTag) { |
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switch (constantTag) { |
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case ByteCodeParser.CONSTANT_INTEGER: |
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return VarType.INTEGER; |
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case ByteCodeParser.CONSTANT_FLOAT: |
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return VarType.FLOAT; |
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case ByteCodeParser.CONSTANT_LONG: |
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return VarType.LONG; |
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case ByteCodeParser.CONSTANT_DOUBLE: |
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return VarType.DOUBLE; |
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|
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case ByteCodeParser.CONSTANT_CLASS: |
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case ByteCodeParser.CONSTANT_UTF8: |
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case ByteCodeParser.CONSTANT_UNICODE: |
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case ByteCodeParser.CONSTANT_STRING: |
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return VarType.REFERENCE; |
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|
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case ByteCodeParser.CONSTANT_FIELD: |
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case ByteCodeParser.CONSTANT_METHOD: |
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case ByteCodeParser.CONSTANT_INTERFACEMETHOD: |
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case ByteCodeParser.CONSTANT_NAMEANDTYPE: |
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/* unclear how to handle for now */ |
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default: |
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throw new IllegalStateException("Unhandled constant tag"); |
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} |
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} |
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|
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public static int fromFieldType(final char fieldType) { |
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switch (fieldType) { |
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case 'B': |
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case 'C': |
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case 'S': |
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case 'Z': |
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case 'I': |
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return VarType.INTEGER; |
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case 'J': |
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return VarType.LONG; |
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case 'F': |
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return VarType.FLOAT; |
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case 'D': |
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return VarType.DOUBLE; |
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case 'L': |
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case '[': |
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return VarType.REFERENCE; |
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|
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default: |
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throw new IllegalStateException("Unhandled field type"); |
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} |
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} |
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} |