-// Copyright 2005 the Contributors, as shown in the revision logs.
-// Licensed under the Apache Public Source License 2.0 ("the License").
-// You may not use this file except in compliance with the License.
+// Copyright 2006 all rights reserved; see LICENSE file for BSD-style license
package edu.berkeley.sbp.tib;
import edu.berkeley.sbp.*;
import edu.berkeley.sbp.misc.*;
+import edu.berkeley.sbp.chr.*;
import java.util.*;
import java.io.*;
-// TODO: multiple {{ }} for superquotation
-// TODO: strings
-// TODO: comments
-
/**
* A slow, ugly, inefficient, inelegant, ad-hoc parser for TIB files.
*
* experimentation with the TIB spec. Once the spec is finalized it
* should probably be rewritten.
*/
-public class Tib implements Token.Stream<Character> {
+public class Tib implements Input<Character> {
+
+ public String showRegion(Region<Character> r) { return ""; }
public Tib(String s) throws IOException { this(new StringReader(s)); }
public Tib(Reader r) throws IOException { this(new BufferedReader(r)); }
//cur = parse(br);
//System.out.println("\rparsing: \"" + cur.toString(0, -1) + "\"");
}
-
+ public String getName() { return null; }
private String s = "";
int pos = 0;
int spos = 0;
int _row = 1;
int _col = 0;
- public Token.Location getLocation() { return new CartesianInput.Location(_row, _col); }
+ int _scalar = 0;
+ public Input.Location getLocation() { return new Cartesian.Location(_col, _row, _scalar); }
private BufferedReader br;
+ char left = CharAtom.left;
+ char right = CharAtom.right;
+
boolean waiting = false;
char waitingChar = ' ';
boolean indenting = true;
int indentation = 0;
private ArrayList<Integer> istack = new ArrayList<Integer>();
- public Character next(int numstates, int resets, int waits) throws IOException {
- Character ret = nextc(numstates, resets);
- if (ret==CharToken.left) System.out.print("\033[31m{\033[0m");
- else if (ret==CharToken.right) System.out.print("\033[31m}\033[0m");
- else if (ret==null) return null;
- else System.out.print(ret);
+ private static boolean debug = "true".equals(System.getProperty("tib.debug", "false"));
+ public Character next() throws IOException {
+ Character ret = nextc();
+ if (debug) {
+ if (ret==null) return null;
+ else if (ret==left) System.out.print("\033[31m{\033[0m");
+ else if (ret==right) System.out.print("\033[31m}\033[0m");
+ else System.out.print(ret);
+ }
return ret;
}
Character waitingBrace = null;
- public Character nextc(int numstates, int resets) throws IOException {
+ public Character nextc() throws IOException {
char c;
if (waitingBrace != null) {
Character ret = waitingBrace;
if (i==-1) {
if (istack.size() > 1) {
istack.remove(istack.size()-1);
- return CharToken.right;
+ return right;
}
return null;
}
c = (char)i;
+ _scalar++;
+ if (c=='\n') { _row++; _col=0; }
+ else _col++;
}
- if (c=='\n') { _row++; _col=0; }
- else _col++;
if (indenting) {
if (c==' ') { indentation++; return done(c); }
- if (c=='\n') { indentation = 0; if (blank) return nextc(numstates, resets); blank = true; waiting = true; waitingChar='\n'; return '\n'; }
+ if (c=='\n') { indentation = 0; if (blank) return nextc(); blank = true; waiting = true; waitingChar='\n'; return '\n'; }
int last = istack.size()==0 ? -1 : istack.get(istack.size()-1);
if (indentation==last) {
if (blank) {
indenting = false;
waitingChar = c;
waiting = true;
- waitingBrace = CharToken.left;
- return CharToken.right;
+ waitingBrace = left;
+ return right;
//return nextc(numstates);
}
blank = false;
indenting = false;
istack.add(indentation);
//System.out.print("\033[31m+"+indentation+"+\033[0m");
- return CharToken.left;
+ return left;
} else /*if (indentation < last)*/ {
istack.remove(istack.size()-1);
//System.out.print("\033[31m-"+last+"-\033[0m");
blank = true;
- return CharToken.right;
+ return right;
}
} else {
blank = false;
public Character done(char c) {
switch(c) {
- case '{': return CharToken.left;
- case '}': return CharToken.right;
+ case '{': return left;
+ case '}': return right;
default: return c;
}
}
// Grammar //////////////////////////////////////////////////////////////////////////////
- public static class Grammar extends MetaGrammar {
+ /*
+ public static class Grammar extends ReflectiveGrammar {
private int anon = 0;
- private final Element ws = Repeat.maximal0(nonTerminal("w"));
- public Grammar() { dropAll.add(ws); }
+ private final Element ws = Sequence.maximal0(getNonTerminal("w"));
+ public Grammar(Class c) { super(c); dropAll.add(ws); }
public Object walk(Tree<String> tree) {
String head = tree.head();
if (tree.numChildren()==0) return super.walk(tree);
if ("{".equals(head)) {
- String s = "braced"+(anon++);
- Union u = nonTerminal(s);
+ Union u = new Union("???");
Union u2 = ((PreSequence)walk(tree, 0)).sparse(ws).buildUnion();
- u2.add(Sequence.singleton(new Element[] { u }, 0, null, null));
- return nonTerminal(s,
- new PreSequence[][] {
- new PreSequence[] {
- new PreSequence(new Element[] { CharToken.leftBrace,
- ws,
- u2,
- ws,
- CharToken.rightBrace
- })
- }
- },
- false,
- false);
+ u2.add(Sequence.singleton(new Element[] { u }, 0));
+ return anonymousNonTerminal(new Sequence[][] {
+ new Sequence[] {
+ Sequence.singleton(new Element[] { CharAtom.leftBrace,
+ ws,
+ u2,
+ ws,
+ CharAtom.rightBrace
+ }, 2)
+ }
+ });
}
return super.walk(tree);
}
}
+ */
/*
public class Braces extends Union {
- private static final Element left = CharToken.string("{");
- private static final Element right = CharToken.string("}");
+ private static final Element left = string("{");
+ private static final Element right = string("}");
public static String join(Object[] e) {
StringBuffer ret = new StringBuffer();
projects / sbp.git / blobdiff