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Diffstat (limited to 'src/classes/com/sun/gluegen/StructLayout.java')
| -rw-r--r-- | src/classes/com/sun/gluegen/StructLayout.java | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/src/classes/com/sun/gluegen/StructLayout.java b/src/classes/com/sun/gluegen/StructLayout.java deleted file mode 100644 index df47fd1f8..000000000 --- a/src/classes/com/sun/gluegen/StructLayout.java +++ /dev/null @@ -1,145 +0,0 @@ -/* - * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * - Redistribution of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * - Redistribution in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * Neither the name of Sun Microsystems, Inc. or the names of - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * This software is provided "AS IS," without a warranty of any kind. ALL - * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, - * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A - * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN - * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR - * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR - * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR - * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR - * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE - * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, - * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF - * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. - * - * You acknowledge that this software is not designed or intended for use - * in the design, construction, operation or maintenance of any nuclear - * facility. - * - * Sun gratefully acknowledges that this software was originally authored - * and developed by Kenneth Bradley Russell and Christopher John Kline. - */ - -package com.sun.gluegen; - -import com.sun.gluegen.cgram.types.*; - -/** Encapsulates algorithm for laying out data structures. Note that - this ends up embedding code in various places via SizeThunks. If - the 32-bit and 64-bit ports on a given platform differ - fundamentally in their handling of struct layout then this code - will need to be updated and, most likely, two versions of the - SizeThunks maintained in various places. */ - -public class StructLayout { - private int baseOffset; - private int structAlignment; - - protected StructLayout(int baseOffset, - int structAlignment) { - this.baseOffset = baseOffset; - this.structAlignment = structAlignment; - } - - public void layout(CompoundType t) { - int n = t.getNumFields(); - SizeThunk curOffset = SizeThunk.constant(baseOffset); - SizeThunk maxSize = SizeThunk.constant(0); - for (int i = 0; i < n; i++) { - Field f = t.getField(i); - Type ft = f.getType(); - if (ft.isInt() || ft.isFloat() || ft.isDouble() || ft.isPointer()) { - SizeThunk sz = ft.getSize(); - curOffset = SizeThunk.roundUp(curOffset, sz); - f.setOffset(curOffset); - if (t.isUnion()) { - maxSize = SizeThunk.max(maxSize, sz); - } else { - curOffset = SizeThunk.add(curOffset, sz); - } - } else if (ft.isCompound()) { - new StructLayout(0, structAlignment).layout(ft.asCompound()); - curOffset = SizeThunk.roundUp(curOffset, SizeThunk.constant(structAlignment)); - f.setOffset(curOffset); - if (t.isUnion()) { - maxSize = SizeThunk.max(maxSize, ft.getSize()); - } else { - curOffset = SizeThunk.add(curOffset, ft.getSize()); - } - } else if (ft.isArray()) { - ArrayType arrayType = ft.asArray(); - CompoundType compoundElementType = arrayType.getBaseElementType().asCompound(); - if (compoundElementType != null) { - new StructLayout(0, structAlignment).layout(compoundElementType); - arrayType.recomputeSize(); - } - // Note: not sure how this rounding is done - curOffset = SizeThunk.roundUp(curOffset, SizeThunk.constant(structAlignment)); - f.setOffset(curOffset); - curOffset = SizeThunk.add(curOffset, ft.getSize()); - } else { - // FIXME - String name = t.getName(); - if (name == null) { - name = t.toString(); - } - throw new RuntimeException("Complicated field types (" + ft + - " " + f.getName() + - " in type " + name + - ") not implemented yet"); - } - } - // FIXME: I think the below is wrong; better check with some examples - // if ((curOffset % structAlignment) != 0) { - // curOffset += structAlignment - (curOffset % structAlignment); - // } - if (t.isUnion()) { - t.setSize(maxSize); - } else { - t.setSize(curOffset); - } - } - - - - public static StructLayout createForCurrentPlatform() { - // Note: this code is replicated in CPU.java - String os = System.getProperty("os.name").toLowerCase(); - String cpu = System.getProperty("os.arch").toLowerCase(); - if ((os.startsWith("windows") && cpu.equals("x86")) || - (os.startsWith("linux") && cpu.equals("i386")) || - (os.startsWith("linux") && cpu.equals("amd64")) || - (os.startsWith("linux") && cpu.equals("x86_64")) || - (os.startsWith("linux") && cpu.equals("ia64")) || - (os.startsWith("sunos") && cpu.equals("sparc")) || - (os.startsWith("sunos") && cpu.equals("x86")) || - (os.startsWith("sunos") && cpu.equals("amd64")) || - (os.startsWith("mac os") && cpu.equals("ppc")) || - (os.startsWith("freebsd") && cpu.equals("i386")) - ) { - // FIXME: make struct alignment configurable? May need to change - // packing rules on a per-type basis? - return new StructLayout(0, 8); - } else { - // FIXME: add more ports - throw new RuntimeException("Please port StructLayout to your OS (" + os + ") and CPU (" + cpu + ")"); - } - } -} |