/* Generated By: CSCC: 4.0 (07/17/2009) Do not edit this line. SimpleCharStream.cs Version 4.0 */ using System; namespace edu.neu.ccs.demeterf.http.classes{ /** * An implementation of interface CharStream, where the stream is assumed to * contain only ASCII characters (without unicode processing). */ public class SimpleCharStream{ public static bool staticFlag = false; int bufsize; int available; int tokenBegin; public int bufpos = -1; protected int[] bufline; protected int[] bufcolumn; protected int column = 0; protected int line = 1; protected bool prevCharIsCR = false; protected bool prevCharIsLF = false; protected System.IO.TextReader inputStream; protected char[] buffer; protected int maxNextCharInd = 0; protected int inBuf = 0; protected int tabSize = 8; protected void setTabSize(int i) { tabSize = i; } protected int getTabSize(int i) { return tabSize; } protected void ExpandBuff(bool wrapAround){ char[] newbuffer = new char[bufsize + 2048]; int[] newbufline = new int[bufsize + 2048]; int[] newbufcolumn = new int[bufsize + 2048]; try{ if (wrapAround){ System.Array.Copy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); System.Array.Copy(buffer, 0, newbuffer, bufsize - tokenBegin, bufpos); buffer = newbuffer; System.Array.Copy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); System.Array.Copy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos); bufline = newbufline; System.Array.Copy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); System.Array.Copy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos); bufcolumn = newbufcolumn; maxNextCharInd = (bufpos += (bufsize - tokenBegin)); }else{ System.Array.Copy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); buffer = newbuffer; System.Array.Copy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); bufline = newbufline; System.Array.Copy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); bufcolumn = newbufcolumn; maxNextCharInd = (bufpos -= tokenBegin); } }catch (System.Exception t){ throw new System.Exception(t.ToString()); } bufsize += 2048; available = bufsize; tokenBegin = 0; } bool stream_closed = false; protected void FillBuff(){ 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 (stream_closed || (i = inputStream.Read(buffer, maxNextCharInd, available - maxNextCharInd)) <= 0){ stream_closed = true; inputStream.Close(); throw new System.IO.IOException(); }else maxNextCharInd += i; return; } catch(System.IO.IOException e) { --bufpos; backup(0); if (tokenBegin == -1) tokenBegin = bufpos; throw e; } } public char BeginToken(){ 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; } public char readChar(){ 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]; } public int getEndColumn() { return bufcolumn[bufpos]; } public int getEndLine() { return bufline[bufpos]; } public int getBeginColumn() { return bufcolumn[tokenBegin]; } public int getBeginLine() { return bufline[tokenBegin]; } public void backup(int amount) { inBuf += amount; if ((bufpos -= amount) < 0) bufpos += bufsize; } public SimpleCharStream(System.IO.TextReader 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]; } public SimpleCharStream(System.IO.TextReader dstream, int startline, int startcolumn) : this(dstream, startline, startcolumn, 4096){} public SimpleCharStream(System.IO.TextReader dstream) : this(dstream, 1, 1, 4096){} public void ReInit(System.IO.TextReader 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; } public void ReInit(System.IO.TextReader dstream, int startline, int startcolumn){ ReInit(dstream, startline, startcolumn, 4096); } public void ReInit(System.IO.TextReader dstream){ ReInit(dstream, 1, 1, 4096); } public SimpleCharStream(System.IO.Stream dstream, int startline, int startcolumn, int buffersize) : this(new System.IO.StreamReader(dstream), startline, startcolumn, buffersize){} public SimpleCharStream(System.IO.Stream dstream, int startline, int startcolumn) : this(dstream, startline, startcolumn, 4096){} public SimpleCharStream(System.IO.Stream dstream) : this(dstream, 1, 1, 4096){} public void ReInit(System.IO.Stream dstream, int startline, int startcolumn, int buffersize){ ReInit(new System.IO.StreamReader(dstream), startline, startcolumn, buffersize); } public void ReInit(System.IO.Stream dstream){ ReInit(dstream, 1, 1, 4096); } public void ReInit(System.IO.Stream dstream, int startline, int startcolumn){ ReInit(dstream, startline, startcolumn, 4096); } 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); } public char[] GetSuffix(int len){ char[] ret = new char[len]; if ((bufpos + 1) >= len) System.Array.Copy(buffer, bufpos - len + 1, ret, 0, len); else{ System.Array.Copy(buffer, bufsize - (len - bufpos - 1), ret, 0, len - bufpos - 1); System.Array.Copy(buffer, 0, ret, len - bufpos - 1, bufpos + 1); } return ret; } 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]; } } }