1/*
2 * [The "BSD license"]
3 *  Copyright (c) 2010 Terence Parr and Alan Condit
4 *  Copyright (c) 2006 Kay Roepke (Objective-C runtime)
5 *  All rights reserved.
6 *
7 *  Redistribution and use in source and binary forms, with or without
8 *  modification, are permitted provided that the following conditions
9 *  are met:
10 *  1. Redistributions of source code must retain the above copyright
11 *      notice, this list of conditions and the following disclaimer.
12 *  2. Redistributions in binary form must reproduce the above copyright
13 *      notice, this list of conditions and the following disclaimer in the
14 *      documentation and/or other materials provided with the distribution.
15 *  3. The name of the author may not be used to endorse or promote products
16 *      derived from this software without specific prior written permission.
17 *
18 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 *  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29package org.antlr.codegen;
30
31import org.antlr.Tool;
32import org.antlr.misc.Utils;
33import org.stringtemplate.v4.ST;
34import org.antlr.tool.Grammar;
35
36import java.io.IOException;
37
38public class ObjCTarget extends Target {
39	protected void genRecognizerHeaderFile(Tool tool,
40										   CodeGenerator generator,
41										   Grammar grammar,
42										   ST headerFileST,
43										   String extName)
44	throws IOException
45	{
46		generator.write(headerFileST, grammar.name + Grammar.grammarTypeToFileNameSuffix[grammar.type] + extName);
47	}
48
49	public String getTargetCharLiteralFromANTLRCharLiteral(CodeGenerator generator,
50														   String literal)
51	{
52		if  (literal.startsWith("'\\u") ) {
53			literal = "0x" +literal.substring(3, 7);
54		} else	{
55			int c = literal.charAt(1); // TJP
56			if  (c < 32 || c > 127) {
57				literal  =  "0x" + Integer.toHexString(c);
58			}
59		}
60
61		return literal;
62	}
63
64	/** Convert from an ANTLR string literal found in a grammar file to
65	*  an equivalent string literal in the target language.  For Java, this
66	*  is the translation 'a\n"' -> "a\n\"".  Expect single quotes
67	*  around the incoming literal.  Just flip the quotes and replace
68	*  double quotes with \"
69	*/
70	public String getTargetStringLiteralFromANTLRStringLiteral(CodeGenerator generator,
71															   String literal)
72	{
73		literal = Utils.replace(literal,"\"","\\\"");
74		StringBuffer buf = new StringBuffer(literal);
75		buf.setCharAt(0,'"');
76		buf.setCharAt(literal.length()-1,'"');
77		buf.insert(0,'@');
78		return buf.toString();
79	}
80
81	/** If we have a label, prefix it with the recognizer's name */
82	public String getTokenTypeAsTargetLabel(CodeGenerator generator, int ttype) {
83		String name = generator.grammar.getTokenDisplayName(ttype);
84		// If name is a literal, return the token type instead
85		if ( name.charAt(0)=='\'' ) {
86			return String.valueOf(ttype);
87		}
88		return name;
89		//return generator.grammar.name + Grammar.grammarTypeToFileNameSuffix[generator.grammar.type] + "_" + name;
90		//return super.getTokenTypeAsTargetLabel(generator, ttype);
91		//return this.getTokenTextAndTypeAsTargetLabel(generator, null, ttype);
92	}
93
94	/** Target must be able to override the labels used for token types. Sometimes also depends on the token text.*/
95	public String getTokenTextAndTypeAsTargetLabel(CodeGenerator generator, String text, int tokenType) {
96		String name = generator.grammar.getTokenDisplayName(tokenType);
97		// If name is a literal, return the token type instead
98		if ( name.charAt(0)=='\'' ) {
99			return String.valueOf(tokenType);
100		}
101		String textEquivalent = text == null ? name : text;
102		if (textEquivalent.charAt(0) >= '0' && textEquivalent.charAt(0) <= '9') {
103			return textEquivalent;
104		} else {
105			return generator.grammar.name + Grammar.grammarTypeToFileNameSuffix[generator.grammar.type] + "_" + textEquivalent;
106		}
107	}
108
109}
110
111