/* Generated By:JavaCC: Do not edit this line. ASCII_CharStream.java Version 0.7pre6 */
package com.steadystate.css.parser;
/**
* An implementation of interface CharStream, where the stream is assumed to
* contain only ASCII characters (without unicode processing).
*/
public final class ASCII_CharStream implements CharStream
{
public static final boolean staticFlag = false;
int bufsize;
int available;
int tokenBegin;
public int bufpos = -1;
private int bufline[];
private int bufcolumn[];
private int column = 0;
private int line = 1;
private boolean prevCharIsCR = false;
private boolean prevCharIsLF = false;
private java.io.Reader inputStream;
private char[] buffer;
private int maxNextCharInd = 0;
private int inBuf = 0;
private final void ExpandBuff(boolean wrapAround)
{
char[] newbuffer = new char[this.bufsize + 2048];
int newbufline[] = new int[this.bufsize + 2048];
int newbufcolumn[] = new int[this.bufsize + 2048];
try
{
if (wrapAround)
{
System.arraycopy(this.buffer, this.tokenBegin, newbuffer, 0, this.bufsize - this.tokenBegin);
System.arraycopy(this.buffer, 0, newbuffer,
this.bufsize - this.tokenBegin, this.bufpos);
this.buffer = newbuffer;
System.arraycopy(this.bufline, this.tokenBegin, newbufline, 0, this.bufsize - this.tokenBegin);
System.arraycopy(this.bufline, 0, newbufline, this.bufsize - this.tokenBegin, this.bufpos);
this.bufline = newbufline;
System.arraycopy(this.bufcolumn, this.tokenBegin, newbufcolumn, 0, this.bufsize - this.tokenBegin);
System.arraycopy(this.bufcolumn, 0, newbufcolumn, this.bufsize - this.tokenBegin, this.bufpos);
this.bufcolumn = newbufcolumn;
this.maxNextCharInd = (this.bufpos += (this.bufsize - this.tokenBegin));
}
else
{
System.arraycopy(this.buffer, this.tokenBegin, newbuffer, 0, this.bufsize - this.tokenBegin);
this.buffer = newbuffer;
System.arraycopy(this.bufline, this.tokenBegin, newbufline, 0, this.bufsize - this.tokenBegin);
this.bufline = newbufline;
System.arraycopy(this.bufcolumn, this.tokenBegin, newbufcolumn, 0, this.bufsize - this.tokenBegin);
this.bufcolumn = newbufcolumn;
this.maxNextCharInd = (this.bufpos -= this.tokenBegin);
}
}
catch (Throwable t)
{
throw new Error(t.getMessage());
}
this.bufsize += 2048;
this.available = this.bufsize;
this.tokenBegin = 0;
}
private final void FillBuff() throws java.io.IOException
{
if (this.maxNextCharInd == this.available)
{
if (this.available == this.bufsize)
{
if (this.tokenBegin > 2048)
{
this.bufpos = this.maxNextCharInd = 0;
this.available = this.tokenBegin;
}
else if (this.tokenBegin < 0)
this.bufpos = this.maxNextCharInd = 0;
else
ExpandBuff(false);
}
else if (this.available > this.tokenBegin)
this.available = this.bufsize;
else if ((this.tokenBegin - this.available) < 2048)
ExpandBuff(true);
else
this.available = this.tokenBegin;
}
int i;
try {
if ((i = this.inputStream.read(this.buffer, this.maxNextCharInd,
this.available - this.maxNextCharInd)) == -1)
{
this.inputStream.close();
throw new java.io.IOException();
}
this.maxNextCharInd += i;
return;
}
catch(java.io.IOException e) {
--this.bufpos;
backup(0);
if (this.tokenBegin == -1)
this.tokenBegin = this.bufpos;
throw e;
}
}
public final char BeginToken() throws java.io.IOException
{
this.tokenBegin = -1;
char c = readChar();
this.tokenBegin = this.bufpos;
return c;
}
private final void UpdateLineColumn(char c)
{
this.column++;
if (this.prevCharIsLF)
{
this.prevCharIsLF = false;
this.line += (this.column = 1);
}
else if (this.prevCharIsCR)
{
this.prevCharIsCR = false;
if (c == '\n')
{
this.prevCharIsLF = true;
}
else
this.line += (this.column = 1);
}
switch (c)
{
case '\r' :
this.prevCharIsCR = true;
break;
case '\n' :
this.prevCharIsLF = true;
break;
case '\t' :
this.column--;
this.column += (8 - (this.column & 07));
break;
default :
break;
}
this.bufline[this.bufpos] = this.line;
this.bufcolumn[this.bufpos] = this.column;
}
public final char readChar() throws java.io.IOException
{
if (this.inBuf > 0)
{
--this.inBuf;
return (char)((char)0xff & this.buffer[(this.bufpos == this.bufsize - 1) ? (this.bufpos = 0) : ++this.bufpos]);
}
if (++this.bufpos >= this.maxNextCharInd)
FillBuff();
char c = (char)((char)0xff & this.buffer[this.bufpos]);
UpdateLineColumn(c);
return (c);
}
/**
* @deprecated
* @see #getEndColumn
*/
public final int getColumn() {
return this.bufcolumn[this.bufpos];
}
/**
* @deprecated
* @see #getEndLine
*/
public final int getLine() {
return this.bufline[this.bufpos];
}
public final int getEndColumn() {
return this.bufcolumn[this.bufpos];
}
public final int getEndLine() {
return this.bufline[this.bufpos];
}
public final int getBeginColumn() {
return this.bufcolumn[this.tokenBegin];
}
public final int getBeginLine() {
return this.bufline[this.tokenBegin];
}
public final void backup(int amount) {
this.inBuf += amount;
if ((this.bufpos -= amount) < 0)
this.bufpos += this.bufsize;
}
public ASCII_CharStream(java.io.Reader dstream, int startline,
int startcolumn, int buffersize)
{
this.inputStream = dstream;
this.line = startline;
this.column = startcolumn - 1;
this.available = this.bufsize = buffersize;
this.buffer = new char[buffersize];
this.bufline = new int[buffersize];
this.bufcolumn = new int[buffersize];
}
public ASCII_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)
{
this.inputStream = dstream;
this.line = startline;
this.column = startcolumn - 1;
if (this.buffer == null || buffersize != this.buffer.length)
{
this.available = this.bufsize = buffersize;
this.buffer = new char[buffersize];
this.bufline = new int[buffersize];
this.bufcolumn = new int[buffersize];
}
this.prevCharIsLF = this.prevCharIsCR = false;
this.tokenBegin = this.inBuf = this.maxNextCharInd = 0;
this.bufpos = -1;
}
public void ReInit(java.io.Reader dstream, int startline,
int startcolumn)
{
ReInit(dstream, startline, startcolumn, 4096);
}
public ASCII_CharStream(java.io.InputStream dstream, int startline,
int startcolumn, int buffersize)
{
this(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
}
public ASCII_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);
}
public final String GetImage()
{
if (this.bufpos >= this.tokenBegin)
return new String(this.buffer, this.tokenBegin, this.bufpos - this.tokenBegin + 1);
return new String(this.buffer, this.tokenBegin, this.bufsize - this.tokenBegin) +
new String(this.buffer, 0, this.bufpos + 1);
}
public final char[] GetSuffix(int len)
{
char[] ret = new char[len];
if ((this.bufpos + 1) >= len)
System.arraycopy(this.buffer, this.bufpos - len + 1, ret, 0, len);
else
{
System.arraycopy(this.buffer, this.bufsize - (len - this.bufpos - 1), ret, 0,
len - this.bufpos - 1);
System.arraycopy(this.buffer, 0, ret, len - this.bufpos - 1, this.bufpos + 1);
}
return ret;
}
public void Done()
{
this.buffer = null;
this.bufline = null;
this.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 = this.tokenBegin;
int len;
if (this.bufpos >= this.tokenBegin)
{
len = this.bufpos - this.tokenBegin + this.inBuf + 1;
}
else
{
len = this.bufsize - this.tokenBegin + this.bufpos + 1 + this.inBuf;
}
int i = 0, j = 0, k = 0;
int nextColDiff = 0, columnDiff = 0;
while (i < len &&
this.bufline[j = start % this.bufsize] == this.bufline[k = ++start % this.bufsize])
{
this.bufline[j] = newLine;
nextColDiff = columnDiff + this.bufcolumn[k] - this.bufcolumn[j];
this.bufcolumn[j] = newCol + columnDiff;
columnDiff = nextColDiff;
i++;
}
if (i < len)
{
this.bufline[j] = newLine++;
this.bufcolumn[j] = newCol + columnDiff;
while (i++ < len)
{
if (this.bufline[j = start % this.bufsize] != this.bufline[++start % this.bufsize])
this.bufline[j] = newLine++;
else
this.bufline[j] = newLine;
}
}
this.line = this.bufline[j];
this.column = this.bufcolumn[j];
}
}