mirror of
https://github.com/marcin-szczepanski/jFuzzyLogic.git
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141 lines
4.9 KiB
Java
141 lines
4.9 KiB
Java
/*
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[The "BSD licence"]
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Copyright (c) 2005-2006 Terence Parr
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.antlr.codegen;
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import org.antlr.stringtemplate.StringTemplate;
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import org.antlr.stringtemplate.StringTemplateGroup;
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import org.antlr.tool.Grammar;
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import org.antlr.Tool;
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import java.io.IOException;
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public class CPPTarget extends Target {
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public String escapeChar( int c ) {
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// System.out.println("CPPTarget.escapeChar("+c+")");
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switch (c) {
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case '\n' : return "\\n";
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case '\t' : return "\\t";
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case '\r' : return "\\r";
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case '\\' : return "\\\\";
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case '\'' : return "\\'";
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case '"' : return "\\\"";
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default :
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if ( c < ' ' || c > 126 )
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{
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if (c > 255)
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{
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String s = Integer.toString(c,16);
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// put leading zeroes in front of the thing..
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while( s.length() < 4 )
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s = '0' + s;
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return "\\u" + s;
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}
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else {
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return "\\" + Integer.toString(c,8);
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}
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}
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else {
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return String.valueOf((char)c);
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}
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}
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}
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/** Converts a String into a representation that can be use as a literal
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* when surrounded by double-quotes.
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*
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* Used for escaping semantic predicate strings for exceptions.
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*
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* @param s The String to be changed into a literal
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*/
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public String escapeString(String s)
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{
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StringBuffer retval = new StringBuffer();
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for (int i = 0; i < s.length(); i++) {
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retval.append(escapeChar(s.charAt(i)));
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}
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return retval.toString();
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}
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protected void genRecognizerHeaderFile(Tool tool,
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CodeGenerator generator,
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Grammar grammar,
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StringTemplate headerFileST,
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String extName)
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throws IOException
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{
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StringTemplateGroup templates = generator.getTemplates();
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generator.write(headerFileST, grammar.name+extName);
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}
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/** Convert from an ANTLR char literal found in a grammar file to
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* an equivalent char literal in the target language. For Java, this
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* is the identify translation; i.e., '\n' -> '\n'. Most languages
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* will be able to use this 1-to-1 mapping. Expect single quotes
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* around the incoming literal.
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* Depending on the charvocabulary the charliteral should be prefixed with a 'L'
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*/
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public String getTargetCharLiteralFromANTLRCharLiteral( CodeGenerator codegen, String literal) {
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int c = Grammar.getCharValueFromGrammarCharLiteral(literal);
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String prefix = "'";
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if( codegen.grammar.getMaxCharValue() > 255 )
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prefix = "L'";
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else if( (c & 0x80) != 0 ) // if in char mode prevent sign extensions
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return ""+c;
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return prefix+escapeChar(c)+"'";
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}
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/** Convert from an ANTLR string literal found in a grammar file to
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* an equivalent string literal in the target language. For Java, this
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* is the identify translation; i.e., "\"\n" -> "\"\n". Most languages
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* will be able to use this 1-to-1 mapping. Expect double quotes
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* around the incoming literal.
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* Depending on the charvocabulary the string should be prefixed with a 'L'
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*/
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public String getTargetStringLiteralFromANTLRStringLiteral( CodeGenerator codegen, String literal) {
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StringBuffer buf = Grammar.getUnescapedStringFromGrammarStringLiteral(literal);
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String prefix = "\"";
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if( codegen.grammar.getMaxCharValue() > 255 )
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prefix = "L\"";
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return prefix+escapeString(buf.toString())+"\"";
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}
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/** Character constants get truncated to this value.
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* TODO: This should be derived from the charVocabulary. Depending on it
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* being 255 or 0xFFFF the templates should generate normal character
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* constants or multibyte ones.
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*/
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public int getMaxCharValue( CodeGenerator codegen ) {
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int maxval = 255; // codegen.grammar.get????();
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if ( maxval <= 255 )
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return 255;
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else
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return maxval;
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}
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}
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