Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/types/CIntegerType.java @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
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| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | a61af66fc99e |
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| 0 | 1 /* |
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2 * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.types; | |
| 26 | |
| 27 import java.util.*; | |
| 28 | |
| 29 /** <P> This subinterface of Type provides accessors to deal with all | |
| 30 C integer types. The observation is that, according to the C | |
| 31 specification, there is no guarantee that the integer types of | |
| 32 char, short, int, and long will not all be of the same size, | |
| 33 meaning that it is incorrect to use any Java primitive type that | |
| 34 is too small to hold all of these values when talking about C | |
| 35 integer types, signed or unsigned. </P> | |
| 36 | |
| 37 <P> Therefore we use long, the largest Java primitive type, | |
| 38 universally to hold C integer field values (deciding that a | |
| 39 ubiquitous change to BigInteger is not currently advantageous). | |
| 40 Routines which read C integers from fields know the fields' sizes | |
| 41 and signedness and read the appropriate number of bytes and handle | |
| 42 sign- or zero- extension for signed and unsigned types, | |
| 43 respectively. Unfortunately, since long is a signed 64-bit | |
| 44 integer, there will be problems handling C's unsigned 64-bit | |
| 45 integers, but these problems must be dealt with by the user. </P> */ | |
| 46 public interface CIntegerType extends Type { | |
| 47 /** Is this integer type unsigned? */ | |
| 48 public boolean isUnsigned(); | |
| 49 | |
| 50 /** What is the maximum value of this type? Note that this will not | |
| 51 work properly for unsigned long longs. */ | |
| 52 public long maxValue(); | |
| 53 | |
| 54 /** What is the minimum value of this type? Note that this will not | |
| 55 work properly for unsigned long longs. */ | |
| 56 public long minValue(); | |
| 57 } |