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package org.archphantom.shenanigans.parser;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
public class Tokenizer {
private BufferedReader readme;
private Object lastRead;
private Token lastReadType;
public Tokenizer (String input) throws IOException {
this(new ByteArrayInputStream(input.getBytes()));
}
public Tokenizer (InputStream input) throws IOException {
this.readme = new BufferedReader(new InputStreamReader(input));
read();
}
private void read () throws IOException {
this.lastRead = null;
boolean ident = false;
boolean number = false;
while (true) {
char c = (char) readme.read();
if (ident && ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '.' || c == '_')) {
readme.mark(1);
this.lastRead = ((String) lastRead) + c;
} else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_') {
ident = true;
readme.mark(1);
this.lastRead = c+"";
} else if (c >= '0' && c <= '9' && number) {
readme.mark(1);
this.lastRead = (Integer) (((Integer) lastRead)*10+(c-'0'));
} else if (c >= '0' && c <= '9') {
number = true;
readme.mark(1);
this.lastRead = Integer.valueOf(c-'0');
} else {
if (ident) {
readme.reset();
this.lastReadType = Token.Ident;
return;
} else if (number) {
readme.reset();
this.lastReadType = Token.Number;
return;
}
switch (c) {
case '.':
this.lastReadType = Token.Decimal;
return;
case '$':
this.lastReadType = Token.EOS;
return;
case '+':
this.lastReadType = Token.Plus;
return;
case '-':
this.lastReadType = Token.Minus;
return;
case '*':
this.lastReadType = Token.Times;
return;
case '/':
this.lastReadType = Token.Divide;
return;
case '%':
this.lastReadType = Token.Modulo;
return;
case '(':
this.lastReadType = Token.LParen;
return;
case ')':
this.lastReadType = Token.RParen;
return;
case '[':
this.lastReadType = Token.LBrace;
return;
case ']':
this.lastReadType = Token.RBrace;
return;
case '{':
this.lastReadType = Token.LCBracket;
return;
case '}':
this.lastReadType = Token.RCBracket;
return;
case ';':
this.lastReadType = Token.Semicolon;
return;
case '\'':
this.lastReadType = Token.Quote;
return;
case '\"':
this.lastReadType = Token.DQuote;
return;
case '&':
this.lastReadType = Token.And;
return;
case '|':
this.lastReadType = Token.Or;
return;
case '!':
this.lastReadType = Token.Not;
return;
case '^':
this.lastReadType = Token.XOr;
return;
case '<':
this.lastReadType = Token.Less;
return;
case '>':
this.lastReadType = Token.Greater;
return;
case '=':
this.lastReadType = Token.Equal;
return;
case '@':
this.lastReadType = Token.Count;
return;
case ':':
this.lastReadType = Token.NSCall;
return;
case '#':
readme.readLine();
return;
}
}
}
}
public Token peak () {
return lastReadType;
}
public Object peakVal () {
return lastRead;
}
public Token pop () throws IOException {
Token lrt = lastReadType;
read();
return lrt;
}
}
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