internal Cons readDelimitedList(LocTextReader t, Int32 delim)
{
Cons ret = null;
Cons tail = null;
Int32 ch = t.Peek();
while (Char.IsWhiteSpace((Char)ch))
{
t.Read();
ch = t.Peek();
}
while (ch != delim)
{
Object o = doRead(t, delim == ')' && ret == null);
if (eof(o))
{
throw new Exception("Read error - eof found before matching: "
+ (Char)delim + "\n File: " + t.file + ", line: " + t.line);
}
EndDelimiter ed = o as EndDelimiter;
if (ed != null)
{
if (ed.delim == delim)
{
return(ret);
}
else
{
throw new Exception("Read error - read unmatched: " + ed.delim
+ "\n File: " + t.file + ", line: " + t.line);
}
}
Cons link = new Cons(o, null);
if (delim == ')' && ret == null && o is CompositeSymbol)
{
ret = ((CompositeSymbol)o).symbolAsList;
tail = ret.rest;
}
else if (ret == null)
{
ret = tail = link;
}
else
{
tail.rest = link;
tail = link;
}
ch = t.Peek();
while (Char.IsWhiteSpace((Char)ch))
{
t.Read();
ch = t.Peek();
}
}
//eat delim
t.Read();
return(ret);
}
internal void eatMultiComment(LocTextReader t)
{
Int32 ch = t.Peek();
while (ch != -1 && ch != '#')
{
t.Read();
ch = t.Peek();
}
if (ch == '#')
{
t.Read();
}
}
internal void eatComment(LocTextReader t)
{
Int32 ch = t.Peek();
while (ch != -1 && ch != '\n' && ch != '\r')
{
t.Read();
ch = t.Peek();
}
if (ch != -1 && ch != '\n' && ch != '\r')
{
t.Read();
}
}
internal Object readSymbolOrNumber(LocTextReader t, Int32 ch, Boolean firstInForm)
{
StringBuilder b = new StringBuilder();
b.Append((Char)ch);
Boolean complete = false;
while (!complete)
{
ch = t.Peek();
if (ch == -1)
{
complete = true;
}
else if (Char.IsWhiteSpace((Char)ch))
{
complete = true;
}
else
{
ReaderMacro rm = (ReaderMacro)macroTable[(Char)ch];
if (rm != null && rm.isTerminating)
{
complete = true;
}
else
{
t.Read();
b.Append((Char)ch);
}
}
}
return(parseSymbolOrNumber(b.ToString(), firstInForm));
}
internal void eatComment(LocTextReader t)
{
Int32 ch = t.Peek();
while (ch != -1 && ch != '\n' && ch != '\r')
{
t.Read();
ch = t.Peek();
}
// MEH: Why? Should never be true, or while would loop.
//if(ch != -1 && ch != '\n' && ch != '\r')
// t.Read();
// MEH: Guessing this was the intention:
while (ch == '\n' || ch == '\r')
{
t.Read();
ch = t.Peek();
}
}
internal Object ReadUnquote(params Object[] args)
{
LocTextReader t = (LocTextReader)args[0];
Int32 line = t.line;
Int32 ch = t.Peek();
Object ret = null;
if (ch == '@')
{
t.Read();
ret = Cons.MakeList(interpreter.UNQUOTE_SPLICING, doRead(t, false));
}
else
{
ret = Cons.MakeList(interpreter.UNQUOTE, doRead(t, false));
}
//record the location
locTable[ret] = new Loc(t.file, line);
return(ret);
}
internal Object readSymbolOrNumber(LocTextReader t,Int32 ch,Boolean firstInForm)
{
StringBuilder b = new StringBuilder();
b.Append((Char)ch);
Boolean complete = false;
while(!complete)
{
ch = t.Peek();
if(ch == -1)
complete = true;
else if(Char.IsWhiteSpace((Char)ch))
complete = true;
else
{
ReaderMacro rm = (ReaderMacro)macroTable[(Char)ch];
if(rm != null && rm.isTerminating)
complete = true;
else
{
t.Read();
b.Append((Char)ch);
}
}
}
return parseSymbolOrNumber(b.ToString(),firstInForm);
}
internal Cons readDelimitedList(LocTextReader t,Int32 delim)
{
Cons ret = null;
Cons tail = null;
Int32 ch = t.Peek();
while(Char.IsWhiteSpace((Char)ch))
{
t.Read();
ch = t.Peek();
}
while(ch != delim)
{
Object o = doRead(t,delim == ')' && ret == null);
if(eof(o))
{
throw new Exception("Read error - eof found before matching: "
+ (Char)delim + "\n File: " + t.file + ", line: " + t.line);
}
EndDelimiter ed = o as EndDelimiter;
if(ed != null)
{
if(ed.delim == delim)
{
return ret;
}
else
throw new Exception("Read error - read unmatched: " + ed.delim
+ "\n File: " + t.file + ", line: " + t.line);
}
Cons link = new Cons(o,null);
if(delim == ')' && ret == null && o is CompositeSymbol)
{
ret = ((CompositeSymbol)o).symbolAsList;
tail = ret.rest;
}
else if(ret == null)
{
ret = tail = link;
}
else
{
tail.rest = link;
tail = link;
}
ch = t.Peek();
while(Char.IsWhiteSpace((Char)ch))
{
t.Read();
ch = t.Peek();
}
}
//eat delim
t.Read();
return ret;
}
internal void eatMultiComment(LocTextReader t)
{
Int32 ch = t.Peek();
while(ch != -1 && ch != '#')
{
t.Read();
ch = t.Peek();
}
if(ch == '#')
t.Read();
}
internal void eatComment(LocTextReader t)
{
Int32 ch = t.Peek();
while(ch != -1 && ch != '\n' && ch != '\r')
{
t.Read();
ch = t.Peek();
}
if(ch != -1 && ch != '\n' && ch != '\r')
t.Read();
}
internal void eatComment(LocTextReader t)
{
Int32 ch = t.Peek();
while(ch != -1 && ch != '\n' && ch != '\r')
{
t.Read();
ch = t.Peek();
}
// MEH: Why? Should never be true, or while would loop.
//if(ch != -1 && ch != '\n' && ch != '\r')
// t.Read();
// MEH: Guessing this was the intention:
while(ch == '\n' || ch == '\r')
{
t.Read();
ch = t.Peek();
}
}