| /* Generated By:JavaCC: Do not edit this line. SimpleCharStream.java Version 5.0 */ |
| /* JavaCCOptions:STATIC=false,SUPPORT_CLASS_VISIBILITY_PUBLIC=true */ |
| package org.luaj.vm2.parser; |
| |
| /** |
| * An implementation of interface CharStream, where the stream is assumed to |
| * contain only ASCII characters (without unicode processing). |
| */ |
| |
| public class SimpleCharStream |
| { |
| /** Whether parser is static. */ |
| public static final boolean staticFlag = false; |
| int bufsize; |
| int available; |
| int tokenBegin; |
| /** Position in buffer. */ |
| public int bufpos = -1; |
| protected int bufline[]; |
| protected int bufcolumn[]; |
| |
| protected int column = 0; |
| protected int line = 1; |
| |
| protected boolean prevCharIsCR = false; |
| protected boolean prevCharIsLF = false; |
| |
| protected java.io.Reader inputStream; |
| |
| protected char[] buffer; |
| protected int maxNextCharInd = 0; |
| protected int inBuf = 0; |
| protected int tabSize = 1; |
| |
| public void setTabSize(int i) { tabSize = i; } |
| public int getTabSize(int i) { return tabSize; } |
| |
| |
| protected 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; |
| |
| maxNextCharInd = (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; |
| |
| maxNextCharInd = (bufpos -= tokenBegin); |
| } |
| } |
| catch (Throwable t) |
| { |
| throw new Error(t.getMessage()); |
| } |
| |
| |
| bufsize += 2048; |
| available = bufsize; |
| tokenBegin = 0; |
| } |
| |
| protected void FillBuff() throws java.io.IOException |
| { |
| if (maxNextCharInd == available) |
| { |
| if (available == bufsize) |
| { |
| if (tokenBegin > 2048) |
| { |
| bufpos = maxNextCharInd = 0; |
| available = tokenBegin; |
| } |
| else if (tokenBegin < 0) |
| bufpos = maxNextCharInd = 0; |
| else |
| ExpandBuff(false); |
| } |
| else if (available > tokenBegin) |
| available = bufsize; |
| else if ((tokenBegin - available) < 2048) |
| ExpandBuff(true); |
| else |
| available = tokenBegin; |
| } |
| |
| int i; |
| try { |
| if ((i = inputStream.read(buffer, maxNextCharInd, available - maxNextCharInd)) == -1) |
| { |
| inputStream.close(); |
| throw new java.io.IOException(); |
| } |
| else |
| maxNextCharInd += i; |
| return; |
| } |
| catch(java.io.IOException e) { |
| --bufpos; |
| backup(0); |
| if (tokenBegin == -1) |
| tokenBegin = bufpos; |
| throw e; |
| } |
| } |
| |
| /** Start. */ |
| public char BeginToken() throws java.io.IOException |
| { |
| tokenBegin = -1; |
| char c = readChar(); |
| tokenBegin = bufpos; |
| |
| return c; |
| } |
| |
| protected 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 += (tabSize - (column % tabSize)); |
| break; |
| default : |
| break; |
| } |
| |
| bufline[bufpos] = line; |
| bufcolumn[bufpos] = column; |
| } |
| |
| /** Read a character. */ |
| public char readChar() throws java.io.IOException |
| { |
| if (inBuf > 0) |
| { |
| --inBuf; |
| |
| if (++bufpos == bufsize) |
| bufpos = 0; |
| |
| return buffer[bufpos]; |
| } |
| |
| if (++bufpos >= maxNextCharInd) |
| FillBuff(); |
| |
| char c = buffer[bufpos]; |
| |
| UpdateLineColumn(c); |
| return c; |
| } |
| |
| /** |
| * @deprecated |
| * @see #getEndColumn |
| */ |
| |
| public int getColumn() { |
| return bufcolumn[bufpos]; |
| } |
| |
| /** |
| * @deprecated |
| * @see #getEndLine |
| */ |
| |
| public int getLine() { |
| return bufline[bufpos]; |
| } |
| |
| /** Get token end column number. */ |
| public int getEndColumn() { |
| return bufcolumn[bufpos]; |
| } |
| |
| /** Get token end line number. */ |
| public int getEndLine() { |
| return bufline[bufpos]; |
| } |
| |
| /** Get token beginning column number. */ |
| public int getBeginColumn() { |
| return bufcolumn[tokenBegin]; |
| } |
| |
| /** Get token beginning line number. */ |
| public int getBeginLine() { |
| return bufline[tokenBegin]; |
| } |
| |
| /** Backup a number of characters. */ |
| public void backup(int amount) { |
| |
| inBuf += amount; |
| if ((bufpos -= amount) < 0) |
| bufpos += bufsize; |
| } |
| |
| /** Constructor. */ |
| public SimpleCharStream(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]; |
| } |
| |
| /** Constructor. */ |
| public SimpleCharStream(java.io.Reader dstream, int startline, |
| int startcolumn) |
| { |
| this(dstream, startline, startcolumn, 4096); |
| } |
| |
| /** Constructor. */ |
| public SimpleCharStream(java.io.Reader dstream) |
| { |
| this(dstream, 1, 1, 4096); |
| } |
| |
| /** Reinitialise. */ |
| public void ReInit(java.io.Reader 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]; |
| } |
| prevCharIsLF = prevCharIsCR = false; |
| tokenBegin = inBuf = maxNextCharInd = 0; |
| bufpos = -1; |
| } |
| |
| /** Reinitialise. */ |
| public void ReInit(java.io.Reader dstream, int startline, |
| int startcolumn) |
| { |
| ReInit(dstream, startline, startcolumn, 4096); |
| } |
| |
| /** Reinitialise. */ |
| public void ReInit(java.io.Reader dstream) |
| { |
| ReInit(dstream, 1, 1, 4096); |
| } |
| /** Constructor. */ |
| public SimpleCharStream(java.io.InputStream dstream, String encoding, int startline, |
| int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException |
| { |
| this(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize); |
| } |
| |
| /** Constructor. */ |
| public SimpleCharStream(java.io.InputStream dstream, int startline, |
| int startcolumn, int buffersize) |
| { |
| this(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize); |
| } |
| |
| /** Constructor. */ |
| public SimpleCharStream(java.io.InputStream dstream, String encoding, int startline, |
| int startcolumn) throws java.io.UnsupportedEncodingException |
| { |
| this(dstream, encoding, startline, startcolumn, 4096); |
| } |
| |
| /** Constructor. */ |
| public SimpleCharStream(java.io.InputStream dstream, int startline, |
| int startcolumn) |
| { |
| this(dstream, startline, startcolumn, 4096); |
| } |
| |
| /** Constructor. */ |
| public SimpleCharStream(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException |
| { |
| this(dstream, encoding, 1, 1, 4096); |
| } |
| |
| /** Constructor. */ |
| public SimpleCharStream(java.io.InputStream dstream) |
| { |
| this(dstream, 1, 1, 4096); |
| } |
| |
| /** Reinitialise. */ |
| public void ReInit(java.io.InputStream dstream, String encoding, int startline, |
| int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException |
| { |
| ReInit(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize); |
| } |
| |
| /** Reinitialise. */ |
| public void ReInit(java.io.InputStream dstream, int startline, |
| int startcolumn, int buffersize) |
| { |
| ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize); |
| } |
| |
| /** Reinitialise. */ |
| public void ReInit(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException |
| { |
| ReInit(dstream, encoding, 1, 1, 4096); |
| } |
| |
| /** Reinitialise. */ |
| public void ReInit(java.io.InputStream dstream) |
| { |
| ReInit(dstream, 1, 1, 4096); |
| } |
| /** Reinitialise. */ |
| public void ReInit(java.io.InputStream dstream, String encoding, int startline, |
| int startcolumn) throws java.io.UnsupportedEncodingException |
| { |
| ReInit(dstream, encoding, startline, startcolumn, 4096); |
| } |
| /** Reinitialise. */ |
| public void ReInit(java.io.InputStream dstream, int startline, |
| int startcolumn) |
| { |
| ReInit(dstream, startline, startcolumn, 4096); |
| } |
| /** Get token literal value. */ |
| public 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); |
| } |
| |
| /** Get the suffix. */ |
| public 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; |
| } |
| |
| /** Reset buffer when finished. */ |
| public void Done() |
| { |
| buffer = null; |
| bufline = null; |
| bufcolumn = null; |
| } |
| |
| /** |
| * Method to adjust line and column numbers for the start of a token. |
| */ |
| 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]; |
| } |
| |
| } |
| /* JavaCC - OriginalChecksum=ab0c629eabd887d4c88cec51eb5e6477 (do not edit this line) */ |