!636 (modern)

public class main {
  !include #1001496 // Matches
  !include #1001065 // DialogIO
  
  static boolean debug = false;
  
  static new Map<S, S> cache;
  
  public static void main(String[] args) throws IOException {
    L<S> standardFunctions = (L) loadVariableDefinition(
      cacheGet("#761"), "standardFunctions");
    long startTime = now();
    String s = loadMainJava();
    
    Map<String, String> sf = new HashMap();
    for (String x : standardFunctions) {
      String[] f = x.split("/");
      sf.put(f[1], f[0]);
    }
    
    for (int i = 0; ; i++) {
      Set<String> defd = new HashSet(findFunctions(s));
      List<String> tok = javaTok(s);
      
      // changes tok
      Set<String> invocations = findFunctionInvocations(tok, sf);
      s = join(tok);
      
      print("Functions invoked: " + structure(invocations));
      List<String> needed = diff(invocations, defd);
      print("Functions needed: " + structure(needed));
      if (needed.isEmpty())
        break;
        
      new L<S> added;
      new StringBuilder buf;
      for (String x : needed) {
        if (defd.contains(x)) continue;
        
        String id = sf.get(x);
        //print("Adding function: " + x + " (" + id + ")");
         
        S function = cacheGet(id);
        if (("\n" + function).contains("\n!")) print("Warning: " + id + " contains translators.");
        
        buf.append(function).append("\n");
        added.add(x);
        defd.addAll(findFunctions(function));
      }
      s = addFunctions(s, str(buf));
      defd = new HashSet(findFunctions(s));
      print("Functions added: " + structure(added));
      
      for (String x : needed)
        if (!defd.contains(x))
          fail("Function not defined properly: " + x);
      print("Iteration " + (i+2));
      if (i >= 1000) fail("Too many iterations");
    }
    saveMainJava(s);
    print("629: " + (now()-startTime) + " ms");
  }

  static boolean substringIs(String s, int i, String pat) {
    return i >= 0 && i+pat.length() < s.length() && s.substring(i, i+pat.length()).equals(pat);
  }
  
  // OK, this should be fast enough.
  static List<String> findFunctions(String src) {
    int idx = src.indexOf("main {"); // yes it's a hack...
    if (idx >= 0) src = src.substring(idx);

    return findFunctionDefinitions(src);
  }
  
  public static String addFunction(String s, String fID) throws IOException {
    int i = s.lastIndexOf('}');
    S function = cacheGet(fID);
    if (("\n" + function).contains("\n!")) print("Warning: " + fID + " contains translators.");
    return s.substring(0, i) + "\n" + function +"\n" + s.substring(i);
  }
  
  public static String addFunctions(String s, String functions) throws IOException {
    int i = s.lastIndexOf('}');
    return s.substring(0, i) + "\n" + functions + s.substring(i);
  }
  
  public static List<String> toLines(String s) {
    List<String> lines = new ArrayList<String>();
    int start = 0;
    while (true) {
      int i = toLines_nextLineBreak(s, start);
      if (i < 0) {
        if (s.length() > start) lines.add(s.substring(start));
        break;
      }

      lines.add(s.substring(start, i));
      if (s.charAt(i) == '\r' && i+1 < s.length() && s.charAt(i+1) == '\n')
        i += 2;
      else
        ++i;

      start = i;
    }
    return lines;
  }

  private static int toLines_nextLineBreak(String s, int start) {
    for (int i = start; i < s.length(); i++) {
      char c = s.charAt(i);
      if (c == '\r' || c == '\n')
        return i;
    }
    return -1;
  }
  
  static String mainJava;
  
  static String loadMainJava() throws IOException {
    if (mainJava != null) return mainJava;
    return loadTextFile("input/main.java", "");
  }

  static void saveMainJava(String s) throws IOException {
    if (mainJava != null)
      mainJava = s;
    else
      saveTextFile("output/main.java", s);
  }
  
  static void saveMainJava(List<String> tok) throws IOException {
    saveMainJava(join(tok));
  }
  
  public static long parseSnippetID(String snippetID) {
    return Long.parseLong(shortenSnippetID(snippetID));
  }

  private static String shortenSnippetID(String snippetID) {
    if (snippetID.startsWith("#"))
      snippetID = snippetID.substring(1);
    String httpBlaBla = "http://tinybrain.de/";
    if (snippetID.startsWith(httpBlaBla))
      snippetID = snippetID.substring(httpBlaBla.length());
    return snippetID;
  }

  public static boolean isSnippetID(String snippetID) {
    snippetID = shortenSnippetID(snippetID);
    return isInteger(snippetID) && Long.parseLong(snippetID) != 0;
  }

  public static boolean isInteger(String s) {
    return Pattern.matches("\\-?\\d+", s);
  }
  
  private static String loadPage(URL url) throws IOException {
    print("Loading: " + url.toExternalForm());
    URLConnection con = url.openConnection();
    return loadPage(con, url);
  }

  public static String loadPage(URLConnection con, URL url) throws IOException {
    String contentType = con.getContentType();
    if (contentType == null)
      throw new IOException("Page could not be read: " + url);
    //Log.info("Content-Type: " + contentType);
    String charset = guessCharset(contentType);
    Reader r = new InputStreamReader(con.getInputStream(), charset);
    StringBuilder buf = new StringBuilder();
    while (true) {
      int ch = r.read();
      if (ch < 0)
        break;
      //Log.info("Chars read: " + buf.length());
      buf.append((char) ch);
    }
    return buf.toString();
  }

  public static String guessCharset(String contentType) {
    Pattern p = Pattern.compile("text/html;\\s+charset=([^\\s]+)\\s*");
    Matcher m = p.matcher(contentType);
    /* If Content-Type doesn't match this pre-conception, choose default and hope for the best. */
    return m.matches() ? m.group(1) : "ISO-8859-1";
  }
  
  static RuntimeException fail() {
    throw new RuntimeException("fail");
  }
  
  static RuntimeException fail(Object msg) {
    throw new RuntimeException(String.valueOf(msg));
  }
  
// replacement for class JavaTok
// maybe incomplete, might want to add floating point numbers
// todo also: extended multi-line strings

static List<String> javaTok(String s) {
  List<String> tok = new ArrayList<String>();
  int l = s.length();
  
  int i = 0;
  while (i < l) {
    int j = i;
    char c; String cc;
    
    // scan for whitespace
    while (j < l) {
      c = s.charAt(j);
      cc = s.substring(j, Math.min(j+2, l));
      if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
        ++j;
      else if (cc.equals("/*")) {
        do ++j; while (j < l && !s.substring(j, Math.min(j+2, l)).equals("*/"));
        j = Math.min(j+2, l);
      } else if (cc.equals("//")) {
        do ++j; while (j < l && "\r\n".indexOf(s.charAt(j)) < 0);
      } else
        break;
    }
    
    tok.add(s.substring(i, j));
    i = j;
    if (i >= l) break;
    c = s.charAt(i); // cc is not needed in rest of loop body
    cc = s.substring(i, Math.min(i+2, l));

    // scan for non-whitespace
    if (c == '\'' || c == '"') {
      char opener = c;
      ++j;
      while (j < l) {
        if (s.charAt(j) == opener) {
          ++j;
          break;
        } else if (s.charAt(j) == '\\' && j+1 < l)
          j += 2;
        else
          ++j;
      }
    } else if (Character.isJavaIdentifierStart(c))
      do ++j; while (j < l && Character.isJavaIdentifierPart(s.charAt(j)));
    else if (Character.isDigit(c)) {
      do ++j; while (j < l && Character.isDigit(s.charAt(j)));
      if (j < l && s.charAt(j) == 'L') ++j; // Long constants like 1L
    } else if (cc.equals("[[")) {
      do ++j; while (j+1 < l && !s.substring(j, j+2).equals("]]"));
      j = Math.min(j+2, l);
    } else
      ++j;

    tok.add(s.substring(i, j));
    i = j;
  }
  
  if ((tok.size() % 2) == 0) tok.add("");
  return tok;
}

static List<String> javaTok(List<String> tok) {
  return javaTok(join(tok));
}

  public static String join(String glue, Iterable<String> strings) {
    StringBuilder buf = new StringBuilder();
    Iterator<String> i = strings.iterator();
    if (i.hasNext()) {
      buf.append(i.next());
      while (i.hasNext())
        buf.append(glue).append(i.next());
    }
    return buf.toString();
  }
  
  public static String join(String glue, String[] strings) {
    return join(glue, Arrays.asList(strings));
  }
  
  public static String join(Iterable<String> strings) {
    return join("", strings);
  }
  
  public static String join(String[] strings) {
    return join("", strings);
  }  
  
// leaves tok properly tokenized
// returns true iff anything was replaced
static boolean jreplace(List<String> tok, String in, String out) {
  return jreplace(tok, in, out, false, true);
}

static boolean jreplace(List<String> tok, String in, String out, boolean ignoreCase, boolean reTok) {
  List<String> tokin = javaTok(in);
  replaceSublist(tokin, litlist("<", "", "quoted", "", ">"), litlist("<quoted>"));
  replaceSublist(tokin, litlist("<", "", "id", "", ">"), litlist("<id>"));
  
  boolean anyChange = false;
  for (int n = 0; n < 10000; n++) {
    int i = findCodeTokens(tok, ignoreCase, toStringArray(codeTokensOnly(tokin)));
    if (i < 0) {
      if (anyChange && reTok)
        replaceCollection(tok, javaTok(tok));
      return anyChange;
    }
    List<String> subList = tok.subList(i-1, i+l(tokin)-1); // N to N
    String expansion = jreplace_expandRefs(out, subList);
    clearAllTokens(tok.subList(i, i+l(tokin)-2)); // code to code
    tok.set(i, expansion);
    anyChange = true;
  }
  throw fail("woot? 10000!");
}

// "$1" is first code token, "$2" second code token etc.
static String jreplace_expandRefs(String s, List<String> tokref) {
  List<String> tok = javaTok(s);
  for (int i = 1; i < l(tok)-2; i += 2) {
    if (tok.get(i).startsWith("$") && isInteger(tok.get(i).substring(1))) {
      String x = tokref.get(-1+parseInt(tok.get(i).substring(1))*2);
      tok.set(i, x);
    }
  }
  return join(tok);
}

  static void replaceToken(List<String> tok, String in, String out) {
    renameToken(tok, in, out);
  }

static <A> void replaceCollection(Collection<A> dest, Collection<A> src) {
  dest.clear();
  dest.addAll(src);
}

static <A> ArrayList<A> litlist(A... a) {
  return new ArrayList<A>(Arrays.asList(a));
}
 static List<String> codeTokensOnly(List<String> tok) {
    List<String> l = new ArrayList<String>();
    for (int i = 1; i < tok.size(); i += 2)
      l.add(tok.get(i));
    return l;
  }
  
static void replaceSublist(List<String> l, List<String> x, List<String> y) {
  int i = 0;
  while (true) {
    i = indexOfSubList(l, x, i);
    if (i < 0) return;
    
    // It's inefficient :D
    for (int j = 0; j < l(x); j++) l.remove(i);
    l.addAll(i, y);
    i += l(y);
  }
}

static int l(Object[] array) {
  return array == null ? 0 : array.length;
}

static int l(Collection c) {
  return c == null ? 0 : c.size();
}

static int l(Map m) {
  return m == null ? 0 : m.size();
}

static int l(String s) {
  return s == null ? 0 : s.length();
} 


static int parseInt(String s) {
  return Integer.parseInt(s);
}

  static void renameToken(List<String> tok, String in, String out) {
    int renames = 0;
    for (int i = 1; i < tok.size(); i += 2) {
      if (tok.get(i).equals(in)) {
        tok.set(i, out);
        ++renames;
      }
    }
  }
  

static String[] toStringArray(List<String> list) {
  return list.toArray(new String[list.size()]);
}

static String[] toStringArray(Object o) {
  if (o instanceof String[])
    return (String[]) o;
  else if (o instanceof List)
    return toStringArray((List<String>) o);
  else
    throw fail("Not a list or array: " + o);
}

  static int findCodeTokens(List<String> tok, String... tokens) {
    return findCodeTokens(tok, 1, false, tokens);
  }
  
  static int findCodeTokens(List<String> tok, boolean ignoreCase, String... tokens) {
    return findCodeTokens(tok, 1, ignoreCase, tokens);
  }
  
  static int findCodeTokens(List<String> tok, int startIdx, boolean ignoreCase, String... tokens) {
    outer: for (int i = startIdx | 1; i+tokens.length*2-2 < tok.size(); i += 2) {
      for (int j = 0; j < tokens.length; j++) {
        String p = tokens[j], t = tok.get(i+j*2);
        boolean match;
        if (eq(p, "*")) match = true;
        else if (eq(p, "<quoted>")) match = isQuoted(t);
        else if (eq(p, "<id>")) match = isIdentifier(t);
        else match = ignoreCase ? eqic(p, t) : eq(p, t);
        
        if (!match)
          continue outer;
      }
      return i;
    }
    return -1;
  }
  
  
  static void clearAllTokens(List<String> tok) {
    for (int i = 0; i < tok.size(); i++)
      tok.set(i, "");
  }
  
  static void clearAllTokens(List<String> tok, int i, int j) {
    for (; i < j; i++)
      tok.set(i, "");
  }

static boolean isIdentifier(String s) {
  return isJavaIdentifier(s);
}

static boolean eqic(String a, String b) {
  if ((a == null) != (b == null)) return false;
  if (a == null) return true;
  return a.equalsIgnoreCase(b);
}


// supports the usual quotings (', ", variable length double brackets)
static boolean isQuoted(String s) {
  if (s.startsWith("'") || s.startsWith("\"")) return true;
  if (!s.startsWith("[")) return false;
  int i = 1;
  while (i < s.length() && s.charAt(i) == '=') ++i;
  return i < s.length() && s.charAt(i) == '[';
  //return Pattern.compile("^\\[=*\\[").matcher(s).find();
}


static boolean eq(Object a, Object b) {
  if (a == null) return b == null;
  if (a.equals(b)) return true;
  if (a instanceof BigInteger) {
    if (b instanceof Integer) return a.equals(BigInteger.valueOf((Integer) b));
    if (b instanceof Long) return a.equals(BigInteger.valueOf((Long) b));
  }
  return false;
}

static boolean isJavaIdentifier(String s) {
  if (s.length() == 0 || !Character.isJavaIdentifierStart(s.charAt(0)))
    return false;
  for (int i = 1; i < s.length(); i++)
    if (!Character.isJavaIdentifierPart(s.charAt(i)))
      return false;
  return true;
}

static <A> int indexOfSubList(List<A> x, List<A> y, int i) {
  outer: for (; i+l(y) <= l(x); i++) {
    for (int j = 0; j < l(y); j++)
      if (neq(x.get(i+j), y.get(j)))
        continue outer;
    return i;
  }
  return -1;
}

static boolean neq(Object a, Object b) {
  return !eq(a, b);
}

static long now() {
  return System.currentTimeMillis();
}

static List<String> diff(Collection<String> a, Set<String> b) {
  List<String> l = new ArrayList();
  for (String s : a)
    if (!b.contains(s))
      l.add(s);
  return l;
}

static int jfind(List<String> tok, String in) {
  List<String> tokin = javaTok(in);
  replaceSublist(tokin, litlist("<", "", "quoted", "", ">"), litlist("<quoted>"));
  replaceSublist(tokin, litlist("<", "", "id", "", ">"), litlist("<id>"));
  
  return findCodeTokens(tok, false, toStringArray(codeTokensOnly(tokin)));
}
  static S cacheGet(S id) ctex {
    id = formatSnippetID(id);
    S text = cache.get(id);
    if (text != null) {
      //print("Snippet CACHED " + fID);
    } else {
      //print("Snippet LOAD " + fID);
      text = loadSnippet(id, false);
      cache.put(id, text);
    }
    ret text;
  }
}

Began life as a copy of #629