1324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver/* 2324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * [The "BSD license"] 3324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Copyright (c) 2010 Terence Parr 4324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * All rights reserved. 5324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 6324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Redistribution and use in source and binary forms, with or without 7324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * modification, are permitted provided that the following conditions 8324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * are met: 9324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 1. Redistributions of source code must retain the above copyright 10324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * notice, this list of conditions and the following disclaimer. 11324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 2. Redistributions in binary form must reproduce the above copyright 12324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * notice, this list of conditions and the following disclaimer in the 13324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * documentation and/or other materials provided with the distribution. 14324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 3. The name of the author may not be used to endorse or promote products 15324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * derived from this software without specific prior written permission. 16324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 17324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 28324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverpackage org.antlr.codegen; 29324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 30324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverimport org.antlr.Tool; 31324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverimport org.stringtemplate.v4.ST; 32324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverimport org.antlr.tool.Grammar; 33324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 34324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverpublic class ActionScriptTarget extends Target { 35324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 36324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public String getTargetCharLiteralFromANTLRCharLiteral( 37324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver CodeGenerator generator, 38324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver String literal) { 39324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 40324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver int c = Grammar.getCharValueFromGrammarCharLiteral(literal); 41324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return String.valueOf(c); 42324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 43324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 44324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public String getTokenTypeAsTargetLabel(CodeGenerator generator, 45324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver int ttype) { 46324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // use ints for predefined types; 47324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // <invalid> <EOR> <DOWN> <UP> 48324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (ttype >= 0 && ttype <= 3) { 49324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return String.valueOf(ttype); 50324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 51324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 52324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver String name = generator.grammar.getTokenDisplayName(ttype); 53324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 54324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // If name is a literal, return the token type instead 55324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (name.charAt(0) == '\'') { 56324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return String.valueOf(ttype); 57324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 58324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 59324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return name; 60324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 61324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 62324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /** 63324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * ActionScript doesn't support Unicode String literals that are considered "illegal" 64324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * or are in the surrogate pair ranges. For example "/uffff" will not encode properly 65324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * nor will "/ud800". To keep things as compact as possible we use the following encoding 66324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * if the int is below 255, we encode as hex literal 67324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * If the int is between 255 and 0x7fff we use a single unicode literal with the value 68324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * If the int is above 0x7fff, we use a unicode literal of 0x80hh, where hh is the high-order 69324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * bits followed by \xll where ll is the lower order bits of a 16-bit number. 70324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 71324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Ideally this should be improved at a future date. The most optimal way to encode this 72324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * may be a compressed AMF encoding that is embedded using an Embed tag in ActionScript. 73324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 74324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * @param v 75324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * @return 76324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 77324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public String encodeIntAsCharEscape(int v) { 78324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // encode as hex 79324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( v<=255 ) { 80324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "\\x"+ Integer.toHexString(v|0x100).substring(1,3); 81324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 82324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (v <= 0x7fff) { 83324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver String hex = Integer.toHexString(v|0x10000).substring(1,5); 84324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "\\u"+hex; 85324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 86324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (v > 0xffff) { 87324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver System.err.println("Warning: character literal out of range for ActionScript target " + v); 88324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return ""; 89324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 90324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver StringBuffer buf = new StringBuffer("\\u80"); 91324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver buf.append(Integer.toHexString((v >> 8) | 0x100).substring(1, 3)); // high - order bits 92324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver buf.append("\\x"); 93324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver buf.append(Integer.toHexString((v & 0xff) | 0x100).substring(1, 3)); // low -order bits 94324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return buf.toString(); 95324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 96324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 97324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /** Convert long to two 32-bit numbers separted by a comma. 98324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * ActionScript does not support 64-bit numbers, so we need to break 99324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * the number into two 32-bit literals to give to the Bit. A number like 100324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 0xHHHHHHHHLLLLLLLL is broken into the following string: 101324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * "0xLLLLLLLL, 0xHHHHHHHH" 102324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Note that the low order bits are first, followed by the high order bits. 103324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * This is to match how the BitSet constructor works, where the bits are 104324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * passed in in 32-bit chunks with low-order bits coming first. 105324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 106324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public String getTarget64BitStringFromValue(long word) { 107324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver StringBuffer buf = new StringBuffer(22); // enough for the two "0x", "," and " " 108324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver buf.append("0x"); 109324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver writeHexWithPadding(buf, Integer.toHexString((int)(word & 0x00000000ffffffffL))); 110324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver buf.append(", 0x"); 111324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver writeHexWithPadding(buf, Integer.toHexString((int)(word >> 32))); 112324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 113324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return buf.toString(); 114324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 115324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 116324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver private void writeHexWithPadding(StringBuffer buf, String digits) { 117324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver digits = digits.toUpperCase(); 118324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver int padding = 8 - digits.length(); 119324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // pad left with zeros 120324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver for (int i=1; i<=padding; i++) { 121324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver buf.append('0'); 122324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 123324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver buf.append(digits); 124324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 125324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 126324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver protected ST chooseWhereCyclicDFAsGo(Tool tool, 127324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver CodeGenerator generator, 128324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver Grammar grammar, 129324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ST recognizerST, 130324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ST cyclicDFAST) { 131324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return recognizerST; 132324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 133324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver} 134324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 135