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110 lines
3.4 KiB
Java
110 lines
3.4 KiB
Java
/*
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* @(#) $(JCGO)/jtrsrc/com/ivmaisoft/jcgo/FloatLiteral.java --
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* a part of JCGO translator.
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**
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* Project: JCGO (http://www.ivmaisoft.com/jcgo/)
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* Copyright (C) 2001-2012 Ivan Maidanski <ivmai@mail.ru>
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* All rights reserved.
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*/
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/*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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**
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* This software is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License (GPL) for more details.
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**
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* Linking this library statically or dynamically with other modules is
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* making a combined work based on this library. Thus, the terms and
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* conditions of the GNU General Public License cover the whole
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* combination.
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**
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* As a special exception, the copyright holders of this library give you
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* permission to link this library with independent modules to produce an
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* executable, regardless of the license terms of these independent
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* modules, and to copy and distribute the resulting executable under
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* terms of your choice, provided that you also meet, for each linked
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* independent module, the terms and conditions of the license of that
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* module. An independent module is a module which is not derived from
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* or based on this library. If you modify this library, you may extend
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* this exception to your version of the library, but you are not
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* obligated to do so. If you do not wish to do so, delete this
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* exception statement from your version.
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*/
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package com.ivmaisoft.jcgo;
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/**
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* Lexical term for a floating-point literal.
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*/
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final class FloatLiteral extends LexTerm {
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private boolean asLiteral;
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private boolean insideArith;
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FloatLiteral(String tokenval) {
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super(LexTerm.FLOATINGPOINT, tokenval);
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}
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ExpressionType exprType() {
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String s = dottedName();
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char ch = s.charAt(s.length() - 1);
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return Main.dict.classTable[ch != 'F' && ch != 'f' ? Type.DOUBLE
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: Type.FLOAT];
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}
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void requireLiteral() {
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asLiteral = true;
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}
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void insideArithOp() {
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insideArith = true;
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}
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int tokenCount() {
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return 2;
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}
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String stringOutput() {
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String s = dottedName();
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int len = s.length();
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char ch = s.charAt(len - 1);
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int type = Type.DOUBLE;
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if (ch == 'F' || ch == 'f') {
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type = Type.FLOAT;
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}
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if (type == Type.FLOAT || ch == 'D' || ch == 'd') {
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s = s.substring(0, len - 1);
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}
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if (!asLiteral && insideArith && isFPZero(s))
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return type == Type.FLOAT ? "JCGO_FP_ZEROF" : "JCGO_FP_ZERO";
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if (s.indexOf('.', 0) < 0 && s.lastIndexOf('E') < 0
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&& s.lastIndexOf('e') < 0) {
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s = s + ".0";
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}
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return "(" + Type.cName[type] + ")" + s;
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}
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boolean isFPZero() {
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return isFPZero(dottedName());
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}
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private static boolean isFPZero(String s) {
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int len = s.length();
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for (int i = 0; i < len; i++) {
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char ch = s.charAt(i);
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if (ch == 'E' || ch == 'e')
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break;
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if (ch >= '1' && ch <= '9')
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return false;
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}
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return true;
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}
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}
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