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com.sun.tools.rngom.parse.compact.UCode_UCodeESC_CharStream Maven / Gradle / Ivy
/*
* Copyright (C) 2004-2012
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/* Generated By:JavaCC: Do not edit this line. UCode_UCodeESC_CharStream.java Version 0.7pre6 */
/* The previous line keeps JavaCC quiet. In fact, the JavaCC generated file
has been edited to fix some bugs. */
package com.sun.tools.rngom.parse.compact;
import com.sun.tools.rngom.ast.builder.BuildException;
import com.sun.tools.rngom.util.Utf16;
import java.io.IOException;
/**
* An implementation of interface CharStream, where the stream is assumed to
* contain 16-bit unicode characters.
*/
public final class UCode_UCodeESC_CharStream {
public static final boolean staticFlag = false;
static final int hexval(char c) {
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;
}
return -1;
}
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.Reader inputStream;
private boolean closed = false;
private boolean prevCharIsLF = false;
private char[] 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];
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;
}
available = (bufsize += 2048);
tokenBegin = 0;
}
private final void FillBuff() throws EOFException {
int i;
if (maxNextCharInd == 4096) {
maxNextCharInd = nextCharInd = 0;
}
if (closed) {
throw new EOFException();
}
try {
if ((i = inputStream.read(nextCharBuf, maxNextCharInd, 4096 - maxNextCharInd)) == -1) {
closed = true;
inputStream.close();
throw new EOFException();
} else {
maxNextCharInd += i;
}
} catch (IOException e) {
throw new BuildException(e);
}
}
private final char ReadChar() throws EOFException {
if (++nextCharInd >= maxNextCharInd) {
FillBuff();
}
return nextCharBuf[nextCharInd];
}
private final char PeekChar() throws EOFException {
char c = ReadChar();
--nextCharInd;
return c;
}
public final char BeginToken() throws EOFException {
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);
}
switch (c) {
case NEWLINE_MARKER:
prevCharIsLF = true;
break;
case '\t':
column--;
column += (8 - (column & 07));
break;
default:
break;
}
bufline[bufpos] = line;
bufcolumn[bufpos] = column;
}
private static final char NEWLINE_MARKER = '\u0000';
public final char readChar() throws EOFException {
if (inBuf > 0) {
--inBuf;
return buffer[(bufpos == bufsize - 1) ? (bufpos = 0) : ++bufpos];
}
char c;
try {
c = ReadChar();
switch (c) {
case '\r':
c = NEWLINE_MARKER;
try {
if (PeekChar() == '\n') {
ReadChar();
}
} catch (EOFException e) {
}
break;
case '\n':
c = NEWLINE_MARKER;
break;
case '\t':
break;
default:
if (c >= 0x20) {
if (Utf16.isSurrogate(c)) {
if (Utf16.isSurrogate2(c)) {
throw new EscapeSyntaxException("illegal_surrogate_pair", line, column + 1);
}
if (++bufpos == available) {
AdjustBuffSize();
}
buffer[bufpos] = c;
// UpdateLineColumn(c);
try {
c = ReadChar();
} catch (EOFException e) {
throw new EscapeSyntaxException("illegal_surrogate_pair", line, column + 1);
}
if (!Utf16.isSurrogate2(c)) {
throw new EscapeSyntaxException("illegal_surrogate_pair", line, column + 2);
}
}
break;
}
// fall through
case '\uFFFE':
case '\uFFFF':
throw new EscapeSyntaxException("illegal_char_code", line, column + 1);
}
} catch (EOFException e) {
if (bufpos == -1) {
if (++bufpos == available) {
AdjustBuffSize();
}
bufline[bufpos] = line;
bufcolumn[bufpos] = column;
}
throw e;
}
if (++bufpos == available) {
AdjustBuffSize();
}
buffer[bufpos] = c;
UpdateLineColumn(c);
try {
if (c != '\\' || PeekChar() != 'x') {
return c;
}
} catch (EOFException e) {
return c;
}
int xCnt = 1;
for (;;) {
ReadChar();
if (++bufpos == available) {
AdjustBuffSize();
}
buffer[bufpos] = 'x';
UpdateLineColumn('x');
try {
c = PeekChar();
} catch (EOFException e) {
backup(xCnt);
return '\\';
}
if (c == '{') {
ReadChar();
column++;
// backup past the 'x's
bufpos -= xCnt;
if (bufpos < 0) {
bufpos += bufsize;
}
break;
}
if (c != 'x') {
backup(xCnt);
return '\\';
}
xCnt++;
}
try {
int scalarValue = hexval(ReadChar());
column++;
if (scalarValue < 0) {
throw new EscapeSyntaxException("illegal_hex_digit", line, column);
}
while ((c = ReadChar()) != '}') {
column++;
int n = hexval(c);
if (n < 0) {
throw new EscapeSyntaxException("illegal_hex_digit", line, column);
}
scalarValue <<= 4;
scalarValue |= n;
if (scalarValue >= 0x110000) {
throw new EscapeSyntaxException("char_code_too_big", line, column);
}
}
column++; // for the '}'
if (scalarValue <= 0xFFFF) {
c = (char) scalarValue;
switch (c) {
case '\n':
case '\r':
case '\t':
break;
default:
if (c >= 0x20 && !Utf16.isSurrogate(c)) {
break;
}
// fall through
case '\uFFFE':
case '\uFFFF':
throw new EscapeSyntaxException("illegal_char_code_ref", line, column);
}
buffer[bufpos] = c;
return c;
}
c = Utf16.surrogate1(scalarValue);
buffer[bufpos] = c;
int bufpos1 = bufpos;
if (++bufpos == bufsize) {
bufpos = 0;
}
buffer[bufpos] = Utf16.surrogate2(scalarValue);
bufline[bufpos] = bufline[bufpos1];
bufcolumn[bufpos] = bufcolumn[bufpos1];
backup(1);
return c;
} catch (EOFException e) {
throw new EscapeSyntaxException("incomplete_escape", line, column);
}
}
/**
* @deprecated @see #getEndColumn
*/
public final int getColumn() {
return bufcolumn[bufpos];
}
/**
* @deprecated @see #getEndLine
*/
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 UCode_UCodeESC_CharStream(java.io.Reader 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 char[4096];
skipBOM();
}
public UCode_UCodeESC_CharStream(java.io.Reader dstream,
int startline, int startcolumn) {
this(dstream, startline, startcolumn, 4096);
}
public void ReInit(java.io.Reader dstream,
int startline, int startcolumn, int buffersize) {
inputStream = dstream;
closed = false;
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 char[4096];
}
prevCharIsLF = false;
tokenBegin = inBuf = maxNextCharInd = 0;
nextCharInd = bufpos = -1;
skipBOM();
}
public void ReInit(java.io.Reader dstream,
int startline, int startcolumn) {
ReInit(dstream, startline, startcolumn, 4096);
}
public UCode_UCodeESC_CharStream(java.io.InputStream dstream, int startline,
int startcolumn, int buffersize) {
this(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
}
public UCode_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) {
ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
}
public void ReInit(java.io.InputStream dstream, int startline,
int startcolumn) {
ReInit(dstream, startline, startcolumn, 4096);
}
static private final char BOM = '\ufeff';
private void skipBOM() {
try {
if (PeekChar() == BOM) {
ReadChar();
}
} catch (EOFException e) {
}
}
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.
