hg/bck2brwsr: rt/vm/src/main/java/org/apidesign/vm4brwsr/VarType.java@cd1cc103a03c

     1 /**

     2  * Back 2 Browser Bytecode Translator

     3  * Copyright (C) 2012-2015 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, version 2 of the License.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program. Look for COPYING file in the top folder.

    16  * If not, see http://opensource.org/licenses/GPL-2.0.

    17  */

    18 package org.apidesign.vm4brwsr;

    20 final class VarType {

    21     public static final int INTEGER = 0;

    22     public static final int LONG = 1;

    23     public static final int FLOAT = 2;

    24     public static final int DOUBLE = 3;

    25     public static final int REFERENCE = 4;

    27     public static final int LAST = REFERENCE;

    29     private VarType() {

    30     }

    32     public static boolean isCategory2(final int varType) {

    33         return (varType == LONG) || (varType == DOUBLE);

    34     }

    36     public static int fromStackMapType(final int smType) {

    37         switch (smType & 0xff) {

    38             case ByteCodeParser.ITEM_Integer:

    39                 return VarType.INTEGER;

    40             case ByteCodeParser.ITEM_Float:

    41                 return VarType.FLOAT;

    42             case ByteCodeParser.ITEM_Double:

    43                 return VarType.DOUBLE;

    44             case ByteCodeParser.ITEM_Long:

    45                 return VarType.LONG;

    46             case ByteCodeParser.ITEM_Null:

    47             case ByteCodeParser.ITEM_InitObject:

    48             case ByteCodeParser.ITEM_Object:

    49             case ByteCodeParser.ITEM_NewObject:

    50                 return VarType.REFERENCE;

    52             case ByteCodeParser.ITEM_Bogus:

    53                 /* unclear how to handle for now */

    54             default:

    55                 throw new IllegalStateException("Unhandled stack map type");

    56         }

    57     }

    59     public static int fromConstantType(final byte constantTag) {

    60         switch (constantTag) {

    61             case ByteCodeParser.CONSTANT_INTEGER:

    62                 return VarType.INTEGER;

    63             case ByteCodeParser.CONSTANT_FLOAT:

    64                 return VarType.FLOAT;

    65             case ByteCodeParser.CONSTANT_LONG:

    66                 return VarType.LONG;

    67             case ByteCodeParser.CONSTANT_DOUBLE:

    68                 return VarType.DOUBLE;

    70             case ByteCodeParser.CONSTANT_CLASS:

    71             case ByteCodeParser.CONSTANT_UTF8:

    72             case ByteCodeParser.CONSTANT_UNICODE:

    73             case ByteCodeParser.CONSTANT_STRING:

    74                 return VarType.REFERENCE;

    76             case ByteCodeParser.CONSTANT_FIELD:

    77             case ByteCodeParser.CONSTANT_METHOD:

    78             case ByteCodeParser.CONSTANT_INTERFACEMETHOD:

    79             case ByteCodeParser.CONSTANT_NAMEANDTYPE:

    80                 /* unclear how to handle for now */

    81             default:

    82                 throw new IllegalStateException("Unhandled constant tag");

    83         }

    84     }

    86     public static int fromFieldType(final char fieldType) {

    87         switch (fieldType) {

    88             case 'B':

    89             case 'C':

    90             case 'S':

    91             case 'Z':

    92             case 'I':

    93                 return VarType.INTEGER;

    94             case 'J':

    95                 return VarType.LONG;

    96             case 'F':

    97                 return VarType.FLOAT;

    98             case 'D':

    99                 return VarType.DOUBLE;

   100             case 'L':

   101             case '[':

   102                 return VarType.REFERENCE;

   104             default:

   105                 throw new IllegalStateException("Unhandled field type");

   106         }

   107     }

   109     public static String toString(final int varType) {

   110         switch (varType) {

   111             case VarType.INTEGER: return "int";

   112             case VarType.LONG: return "long";

   113             case VarType.FLOAT: return "float";

   114             case VarType.DOUBLE: return "double";

   115             case VarType.REFERENCE: return "ref";

   116             default:

   117                 throw new IllegalStateException("Unhandled field type");

   118         }

   119     }

   120 }

author	Jaroslav Tulach <jaroslav.tulach@apidesign.org>
	Tue, 17 Jan 2017 07:04:06 +0100
changeset 1985	cd1cc103a03c
parent 1787	ea12a3bb4b33
permissions	-rw-r--r--