| /* |
| * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This source code is provided to illustrate the usage of a given feature |
| * or technique and has been deliberately simplified. Additional steps |
| * required for a production-quality application, such as security checks, |
| * input validation and proper error handling, might not be present in |
| * this sample code. |
| */ |
| |
| |
| /* Generated By:JavaCC: Do not edit this line. ASCII_UCodeESC_CharStream.java Version 0.7pre6 */ |
| |
| package com.sun.tools.example.debug.expr; |
| |
| /** |
| * An implementation of interface CharStream, where the stream is assumed to |
| * contain only ASCII characters (with java-like unicode escape processing). |
| */ |
| |
| public final class ASCII_UCodeESC_CharStream |
| { |
| public static final boolean staticFlag = false; |
| static final int hexval(char c) throws java.io.IOException { |
| switch(c) |
| { |
| case '0' : |
| return 0; |
| case '1' : |
| return 1; |
| case '2' : |
| return 2; |
| case '3' : |
| return 3; |
| case '4' : |
| return 4; |
| case '5' : |
| return 5; |
| case '6' : |
| return 6; |
| case '7' : |
| return 7; |
| case '8' : |
| return 8; |
| case '9' : |
| return 9; |
| |
| case 'a' : |
| case 'A' : |
| return 10; |
| case 'b' : |
| case 'B' : |
| return 11; |
| case 'c' : |
| case 'C' : |
| return 12; |
| case 'd' : |
| case 'D' : |
| return 13; |
| case 'e' : |
| case 'E' : |
| return 14; |
| case 'f' : |
| case 'F' : |
| return 15; |
| } |
| |
| throw new java.io.IOException(); // Should never come here |
| } |
| |
| public int bufpos = -1; |
| int bufsize; |
| int available; |
| int tokenBegin; |
| private int bufline[]; |
| private int bufcolumn[]; |
| |
| private int column = 0; |
| private int line = 1; |
| |
| private java.io.InputStream inputStream; |
| |
| private boolean prevCharIsCR = false; |
| private boolean prevCharIsLF = false; |
| |
| private byte[] nextCharBuf; |
| private char[] buffer; |
| private int maxNextCharInd = 0; |
| private int nextCharInd = -1; |
| private int inBuf = 0; |
| |
| private final void ExpandBuff(boolean wrapAround) |
| { |
| char[] newbuffer = new char[bufsize + 2048]; |
| int newbufline[] = new int[bufsize + 2048]; |
| int newbufcolumn[] = new int[bufsize + 2048]; |
| |
| try |
| { |
| if (wrapAround) |
| { |
| System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); |
| System.arraycopy(buffer, 0, newbuffer, |
| bufsize - tokenBegin, bufpos); |
| buffer = newbuffer; |
| |
| System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); |
| System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos); |
| bufline = newbufline; |
| |
| System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); |
| System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos); |
| bufcolumn = newbufcolumn; |
| |
| bufpos += (bufsize - tokenBegin); |
| } |
| else |
| { |
| System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); |
| buffer = newbuffer; |
| |
| System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); |
| bufline = newbufline; |
| |
| System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); |
| bufcolumn = newbufcolumn; |
| |
| bufpos -= tokenBegin; |
| } |
| } |
| catch (Throwable t) |
| { |
| throw new Error(t.getMessage()); |
| } |
| |
| available = (bufsize += 2048); |
| tokenBegin = 0; |
| } |
| |
| private final void FillBuff() throws java.io.IOException |
| { |
| int i; |
| if (maxNextCharInd == 4096) |
| maxNextCharInd = nextCharInd = 0; |
| |
| try { |
| if ((i = inputStream.read(nextCharBuf, maxNextCharInd, |
| 4096 - maxNextCharInd)) == -1) |
| { |
| inputStream.close(); |
| throw new java.io.IOException(); |
| } |
| else |
| maxNextCharInd += i; |
| return; |
| } |
| catch(java.io.IOException e) { |
| if (bufpos != 0) |
| { |
| --bufpos; |
| backup(0); |
| } |
| else |
| { |
| bufline[bufpos] = line; |
| bufcolumn[bufpos] = column; |
| } |
| throw e; |
| } |
| } |
| |
| private final byte ReadByte() throws java.io.IOException |
| { |
| if (++nextCharInd >= maxNextCharInd) |
| FillBuff(); |
| |
| return nextCharBuf[nextCharInd]; |
| } |
| |
| public final char BeginToken() throws java.io.IOException |
| { |
| if (inBuf > 0) |
| { |
| --inBuf; |
| return buffer[tokenBegin = (bufpos == bufsize - 1) ? (bufpos = 0) |
| : ++bufpos]; |
| } |
| |
| tokenBegin = 0; |
| bufpos = -1; |
| |
| return readChar(); |
| } |
| |
| private final void AdjustBuffSize() |
| { |
| if (available == bufsize) |
| { |
| if (tokenBegin > 2048) |
| { |
| bufpos = 0; |
| available = tokenBegin; |
| } |
| else |
| ExpandBuff(false); |
| } |
| else if (available > tokenBegin) |
| available = bufsize; |
| else if ((tokenBegin - available) < 2048) |
| ExpandBuff(true); |
| else |
| available = tokenBegin; |
| } |
| |
| private final void UpdateLineColumn(char c) |
| { |
| column++; |
| |
| if (prevCharIsLF) |
| { |
| prevCharIsLF = false; |
| line += (column = 1); |
| } |
| else if (prevCharIsCR) |
| { |
| prevCharIsCR = false; |
| if (c == '\n') |
| { |
| prevCharIsLF = true; |
| } |
| else |
| line += (column = 1); |
| } |
| |
| switch (c) |
| { |
| case '\r' : |
| prevCharIsCR = true; |
| break; |
| case '\n' : |
| prevCharIsLF = true; |
| break; |
| case '\t' : |
| column--; |
| column += (8 - (column & 07)); |
| break; |
| default : |
| break; |
| } |
| |
| bufline[bufpos] = line; |
| bufcolumn[bufpos] = column; |
| } |
| |
| public final char readChar() throws java.io.IOException |
| { |
| if (inBuf > 0) |
| { |
| --inBuf; |
| return buffer[(bufpos == bufsize - 1) ? (bufpos = 0) : ++bufpos]; |
| } |
| |
| char c; |
| |
| if (++bufpos == available) |
| AdjustBuffSize(); |
| |
| if (((buffer[bufpos] = c = (char)((char)0xff & ReadByte())) == '\\')) |
| { |
| UpdateLineColumn(c); |
| |
| int backSlashCnt = 1; |
| |
| for (;;) // Read all the backslashes |
| { |
| if (++bufpos == available) |
| AdjustBuffSize(); |
| |
| try |
| { |
| if ((buffer[bufpos] = c = (char)((char)0xff & ReadByte())) != '\\') |
| { |
| UpdateLineColumn(c); |
| // found a non-backslash char. |
| if ((c == 'u') && ((backSlashCnt & 1) == 1)) |
| { |
| if (--bufpos < 0) |
| bufpos = bufsize - 1; |
| |
| break; |
| } |
| |
| backup(backSlashCnt); |
| return '\\'; |
| } |
| } |
| catch(java.io.IOException e) |
| { |
| if (backSlashCnt > 1) |
| backup(backSlashCnt); |
| |
| return '\\'; |
| } |
| |
| UpdateLineColumn(c); |
| backSlashCnt++; |
| } |
| |
| // Here, we have seen an odd number of backslash's followed by a 'u' |
| try |
| { |
| while ((c = (char)((char)0xff & ReadByte())) == 'u') |
| ++column; |
| |
| buffer[bufpos] = c = (char)(hexval(c) << 12 | |
| hexval((char)((char)0xff & ReadByte())) << 8 | |
| hexval((char)((char)0xff & ReadByte())) << 4 | |
| hexval((char)((char)0xff & ReadByte()))); |
| |
| column += 4; |
| } |
| catch(java.io.IOException e) |
| { |
| throw new Error("Invalid escape character at line " + line + |
| " column " + column + "."); |
| } |
| |
| if (backSlashCnt == 1) |
| return c; |
| else |
| { |
| backup(backSlashCnt - 1); |
| return '\\'; |
| } |
| } |
| else |
| { |
| UpdateLineColumn(c); |
| return (c); |
| } |
| } |
| |
| /** |
| * @deprecated |
| * @see #getEndColumn |
| */ |
| @Deprecated |
| public final int getColumn() { |
| return bufcolumn[bufpos]; |
| } |
| |
| /** |
| * @deprecated |
| * @see #getEndLine |
| */ |
| @Deprecated |
| public final int getLine() { |
| return bufline[bufpos]; |
| } |
| |
| public final int getEndColumn() { |
| return bufcolumn[bufpos]; |
| } |
| |
| public final int getEndLine() { |
| return bufline[bufpos]; |
| } |
| |
| public final int getBeginColumn() { |
| return bufcolumn[tokenBegin]; |
| } |
| |
| public final int getBeginLine() { |
| return bufline[tokenBegin]; |
| } |
| |
| public final void backup(int amount) { |
| |
| inBuf += amount; |
| if ((bufpos -= amount) < 0) |
| bufpos += bufsize; |
| } |
| |
| public ASCII_UCodeESC_CharStream(java.io.InputStream dstream, |
| int startline, int startcolumn, int buffersize) |
| { |
| inputStream = dstream; |
| line = startline; |
| column = startcolumn - 1; |
| |
| available = bufsize = buffersize; |
| buffer = new char[buffersize]; |
| bufline = new int[buffersize]; |
| bufcolumn = new int[buffersize]; |
| nextCharBuf = new byte[4096]; |
| } |
| |
| public ASCII_UCodeESC_CharStream(java.io.InputStream dstream, |
| int startline, int startcolumn) |
| { |
| this(dstream, startline, startcolumn, 4096); |
| } |
| public void ReInit(java.io.InputStream dstream, |
| int startline, int startcolumn, int buffersize) |
| { |
| inputStream = dstream; |
| line = startline; |
| column = startcolumn - 1; |
| |
| if (buffer == null || buffersize != buffer.length) |
| { |
| available = bufsize = buffersize; |
| buffer = new char[buffersize]; |
| bufline = new int[buffersize]; |
| bufcolumn = new int[buffersize]; |
| nextCharBuf = new byte[4096]; |
| } |
| prevCharIsLF = prevCharIsCR = false; |
| tokenBegin = inBuf = maxNextCharInd = 0; |
| nextCharInd = bufpos = -1; |
| } |
| |
| public void ReInit(java.io.InputStream dstream, |
| int startline, int startcolumn) |
| { |
| ReInit(dstream, startline, startcolumn, 4096); |
| } |
| |
| public final String GetImage() |
| { |
| if (bufpos >= tokenBegin) |
| return new String(buffer, tokenBegin, bufpos - tokenBegin + 1); |
| else |
| return new String(buffer, tokenBegin, bufsize - tokenBegin) + |
| new String(buffer, 0, bufpos + 1); |
| } |
| |
| public final char[] GetSuffix(int len) |
| { |
| char[] ret = new char[len]; |
| |
| if ((bufpos + 1) >= len) |
| System.arraycopy(buffer, bufpos - len + 1, ret, 0, len); |
| else |
| { |
| System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0, |
| len - bufpos - 1); |
| System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1); |
| } |
| |
| return ret; |
| } |
| |
| public void Done() |
| { |
| nextCharBuf = null; |
| buffer = null; |
| bufline = null; |
| bufcolumn = null; |
| } |
| |
| /** |
| * Method to adjust line and column numbers for the start of a token.<BR> |
| */ |
| public void adjustBeginLineColumn(int newLine, int newCol) |
| { |
| int start = tokenBegin; |
| int len; |
| |
| if (bufpos >= tokenBegin) |
| { |
| len = bufpos - tokenBegin + inBuf + 1; |
| } |
| else |
| { |
| len = bufsize - tokenBegin + bufpos + 1 + inBuf; |
| } |
| |
| int i = 0, j = 0, k = 0; |
| int nextColDiff = 0, columnDiff = 0; |
| |
| while (i < len && |
| bufline[j = start % bufsize] == bufline[k = ++start % bufsize]) |
| { |
| bufline[j] = newLine; |
| nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j]; |
| bufcolumn[j] = newCol + columnDiff; |
| columnDiff = nextColDiff; |
| i++; |
| } |
| |
| if (i < len) |
| { |
| bufline[j] = newLine++; |
| bufcolumn[j] = newCol + columnDiff; |
| |
| while (i++ < len) |
| { |
| if (bufline[j = start % bufsize] != bufline[++start % bufsize]) |
| bufline[j] = newLine++; |
| else |
| bufline[j] = newLine; |
| } |
| } |
| |
| line = bufline[j]; |
| column = bufcolumn[j]; |
| } |
| |
| } |