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src/share/classes/com/sun/tools/javah/Mangle.java@2eb010b6cb22 (annotated)

src/share/classes/com/sun/tools/javah/Mangle.java

Thu, 31 Aug 2017 15:17:03 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:17:03 +0800

changeset 2525

2eb010b6cb22

parent 1362

c46e0c9940d6

parent 0

959103a6100f

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26
aoqi@0	27	package com.sun.tools.javah;
aoqi@0	28
aoqi@0	29	import javax.lang.model.element.ExecutableElement;
aoqi@0	30	import javax.lang.model.element.TypeElement;
aoqi@0	31	import javax.lang.model.element.VariableElement;
aoqi@0	32	import javax.lang.model.util.Elements;
aoqi@0	33	import javax.lang.model.util.Types;
aoqi@0	34
aoqi@0	35	/**
aoqi@0	36	* A utility for mangling java identifiers into C names. Should make
aoqi@0	37	* this more fine grained and distribute the functionality to the
aoqi@0	38	* generators.
aoqi@0	39	*
aoqi@0	40	* <p><b>This is NOT part of any supported API.
aoqi@0	41	* If you write code that depends on this, you do so at your own
aoqi@0	42	* risk. This code and its internal interfaces are subject to change
aoqi@0	43	* or deletion without notice.</b></p>
aoqi@0	44	*
aoqi@0	45	* @author Sucheta Dambalkar(Revised)
aoqi@0	46	*/
aoqi@0	47	public class Mangle {
aoqi@0	48
aoqi@0	49	public static class Type {
aoqi@0	50	public static final int CLASS = 1;
aoqi@0	51	public static final int FIELDSTUB = 2;
aoqi@0	52	public static final int FIELD = 3;
aoqi@0	53	public static final int JNI = 4;
aoqi@0	54	public static final int SIGNATURE = 5;
aoqi@0	55	public static final int METHOD_JDK_1 = 6;
aoqi@0	56	public static final int METHOD_JNI_SHORT = 7;
aoqi@0	57	public static final int METHOD_JNI_LONG = 8;
aoqi@0	58	};
aoqi@0	59
aoqi@0	60	private Elements elems;
aoqi@0	61	private Types types;
aoqi@0	62
aoqi@0	63	Mangle(Elements elems, Types types) {
aoqi@0	64	this.elems = elems;
aoqi@0	65	this.types = types;
aoqi@0	66	}
aoqi@0	67
aoqi@0	68	public final String mangle(CharSequence name, int mtype) {
aoqi@0	69	StringBuilder result = new StringBuilder(100);
aoqi@0	70	int length = name.length();
aoqi@0	71
aoqi@0	72	for (int i = 0; i < length; i++) {
aoqi@0	73	char ch = name.charAt(i);
aoqi@0	74	if (isalnum(ch)) {
aoqi@0	75	result.append(ch);
aoqi@0	76	} else if ((ch == '.') &&
aoqi@0	77	mtype == Mangle.Type.CLASS) {
aoqi@0	78	result.append('_');
aoqi@0	79	} else if (( ch == '$') &&
aoqi@0	80	mtype == Mangle.Type.CLASS) {
aoqi@0	81	result.append('_');
aoqi@0	82	result.append('_');
aoqi@0	83	} else if (ch == '_' && mtype == Mangle.Type.FIELDSTUB) {
aoqi@0	84	result.append('_');
aoqi@0	85	} else if (ch == '_' && mtype == Mangle.Type.CLASS) {
aoqi@0	86	result.append('_');
aoqi@0	87	} else if (mtype == Mangle.Type.JNI) {
aoqi@0	88	String esc = null;
aoqi@0	89	if (ch == '_')
aoqi@0	90	esc = "_1";
aoqi@0	91	else if (ch == '.')
aoqi@0	92	esc = "_";
aoqi@0	93	else if (ch == ';')
aoqi@0	94	esc = "_2";
aoqi@0	95	else if (ch == '[')
aoqi@0	96	esc = "_3";
aoqi@0	97	if (esc != null) {
aoqi@0	98	result.append(esc);
aoqi@0	99	} else {
aoqi@0	100	result.append(mangleChar(ch));
aoqi@0	101	}
aoqi@0	102	} else if (mtype == Mangle.Type.SIGNATURE) {
aoqi@0	103	if (isprint(ch)) {
aoqi@0	104	result.append(ch);
aoqi@0	105	} else {
aoqi@0	106	result.append(mangleChar(ch));
aoqi@0	107	}
aoqi@0	108	} else {
aoqi@0	109	result.append(mangleChar(ch));
aoqi@0	110	}
aoqi@0	111	}
aoqi@0	112
aoqi@0	113	return result.toString();
aoqi@0	114	}
aoqi@0	115
aoqi@0	116	public String mangleMethod(ExecutableElement method, TypeElement clazz,
aoqi@0	117	int mtype) throws TypeSignature.SignatureException {
aoqi@0	118	StringBuilder result = new StringBuilder(100);
aoqi@0	119	result.append("Java_");
aoqi@0	120
aoqi@0	121	if (mtype == Mangle.Type.METHOD_JDK_1) {
aoqi@0	122	result.append(mangle(clazz.getQualifiedName(), Mangle.Type.CLASS));
aoqi@0	123	result.append('_');
aoqi@0	124	result.append(mangle(method.getSimpleName(),
aoqi@0	125	Mangle.Type.FIELD));
aoqi@0	126	result.append("_stub");
aoqi@0	127	return result.toString();
aoqi@0	128	}
aoqi@0	129
aoqi@0	130	/* JNI */
aoqi@0	131	result.append(mangle(getInnerQualifiedName(clazz), Mangle.Type.JNI));
aoqi@0	132	result.append('_');
aoqi@0	133	result.append(mangle(method.getSimpleName(),
aoqi@0	134	Mangle.Type.JNI));
aoqi@0	135	if (mtype == Mangle.Type.METHOD_JNI_LONG) {
aoqi@0	136	result.append("__");
aoqi@0	137	String typesig = signature(method);
aoqi@0	138	TypeSignature newTypeSig = new TypeSignature(elems);
aoqi@0	139	String sig = newTypeSig.getTypeSignature(typesig, method.getReturnType());
aoqi@0	140	sig = sig.substring(1);
aoqi@0	141	sig = sig.substring(0, sig.lastIndexOf(')'));
aoqi@0	142	sig = sig.replace('/', '.');
aoqi@0	143	result.append(mangle(sig, Mangle.Type.JNI));
aoqi@0	144	}
aoqi@0	145
aoqi@0	146	return result.toString();
aoqi@0	147	}
aoqi@0	148	//where
aoqi@0	149	private String getInnerQualifiedName(TypeElement clazz) {
aoqi@0	150	return elems.getBinaryName(clazz).toString();
aoqi@0	151	}
aoqi@0	152
aoqi@0	153	public final String mangleChar(char ch) {
aoqi@0	154	String s = Integer.toHexString(ch);
aoqi@0	155	int nzeros = 5 - s.length();
aoqi@0	156	char[] result = new char[6];
aoqi@0	157	result[0] = '_';
aoqi@0	158	for (int i = 1; i <= nzeros; i++)
aoqi@0	159	result[i] = '0';
aoqi@0	160	for (int i = nzeros+1, j = 0; i < 6; i++, j++)
aoqi@0	161	result[i] = s.charAt(j);
aoqi@0	162	return new String(result);
aoqi@0	163	}
aoqi@0	164
aoqi@0	165	// Warning: duplicated in Gen
aoqi@0	166	private String signature(ExecutableElement e) {
aoqi@0	167	StringBuilder sb = new StringBuilder();
aoqi@0	168	String sep = "(";
aoqi@0	169	for (VariableElement p: e.getParameters()) {
aoqi@0	170	sb.append(sep);
aoqi@0	171	sb.append(types.erasure(p.asType()).toString());
aoqi@0	172	sep = ",";
aoqi@0	173	}
aoqi@0	174	sb.append(")");
aoqi@0	175	return sb.toString();
aoqi@0	176	}
aoqi@0	177
aoqi@0	178	/* Warning: Intentional ASCII operation. */
aoqi@0	179	private static final boolean isalnum(char ch) {
aoqi@0	180	return ch <= 0x7f && /* quick test */
aoqi@0	181	((ch >= 'A' && ch <= 'Z') ||
aoqi@0	182	(ch >= 'a' && ch <= 'z') ||
aoqi@0	183	(ch >= '0' && ch <= '9'));
aoqi@0	184	}
aoqi@0	185
aoqi@0	186	/* Warning: Intentional ASCII operation. */
aoqi@0	187	private static final boolean isprint(char ch) {
aoqi@0	188	return ch >= 32 && ch <= 126;
aoqi@0	189	}
aoqi@0	190	}