13447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein/* 23447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein [The "BSD license"] 33447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein Copyright (c) 2005-2009 Terence Parr 43447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein All rights reserved. 53447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 63447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein Redistribution and use in source and binary forms, with or without 73447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein modification, are permitted provided that the following conditions 83447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein are met: 93447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 1. Redistributions of source code must retain the above copyright 103447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein notice, this list of conditions and the following disclaimer. 113447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 2. Redistributions in binary form must reproduce the above copyright 123447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein notice, this list of conditions and the following disclaimer in the 133447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein documentation and/or other materials provided with the distribution. 143447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 3. The name of the author may not be used to endorse or promote products 153447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein derived from this software without specific prior written permission. 163447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 173447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 183447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 193447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 203447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 213447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 223447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 233447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 243447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 253447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 263447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 273447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein */ 283447a5916aa62f44de24cc441fc9987116ddff52Andrew Sappersteinpackage org.antlr.runtime; 293447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 303447a5916aa62f44de24cc441fc9987116ddff52Andrew Sappersteinimport java.io.*; 313447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 323447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein/** This is a char buffer stream that is loaded from a file 333447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein * all at once when you construct the object. This looks very 343447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein * much like an ANTLReader or ANTLRInputStream, but it's a special case 353447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein * since we know the exact size of the object to load. We can avoid lots 363447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein * of data copying. 373447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein */ 383447a5916aa62f44de24cc441fc9987116ddff52Andrew Sappersteinpublic class ANTLRFileStream extends ANTLRStringStream { 393447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein protected String fileName; 403447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 413447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein public ANTLRFileStream(String fileName) throws IOException { 423447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein this(fileName, null); 433447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein } 443447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 453447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein public ANTLRFileStream(String fileName, String encoding) throws IOException { 463447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein this.fileName = fileName; 473447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein load(fileName, encoding); 483447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein } 493447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 503447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein public void load(String fileName, String encoding) 513447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein throws IOException 523447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein { 533447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein if ( fileName==null ) { 543447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein return; 553447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein } 563447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein File f = new File(fileName); 573447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein int size = (int)f.length(); 583447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein InputStreamReader isr; 593447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein FileInputStream fis = new FileInputStream(fileName); 603447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein if ( encoding!=null ) { 613447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein isr = new InputStreamReader(fis, encoding); 623447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein } 633447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein else { 643447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein isr = new InputStreamReader(fis); 653447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein } 663447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein try { 673447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein data = new char[size]; 683447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein super.n = isr.read(data); 693447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein } 703447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein finally { 713447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein isr.close(); 723447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein } 733447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein } 743447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein 753447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein public String getSourceName() { 763447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein return fileName; 773447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein } 783447a5916aa62f44de24cc441fc9987116ddff52Andrew Sapperstein} 79