Moved GlueGen out of the JOGL workspace and into its own project.

Restructured JOGL and JOAL build processes to separately invoke
GlueGen's main build.xml before using it to generate their code.
Refactored OS/CPU detection code into gluegen-cpptasks.xml build file
in GlueGen workspace, which is now imported by both the JOGL and JOAL
build processes. Unfortunately it seems to be somewhat difficult to
completely factor out the C compiler configuration into the GlueGen
workspace so this has been left for a later date. Added missed
ALProcAddressLookup file to JOAL workspace. Updated JOGL and JOAL
build documentation. More documentation for the GlueGen workspace is
forthcoming.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/../svn-server-sync/gluegen/trunk@3 a78bb65f-1512-4460-ba86-f6dc96a7bf27

1 files changed, 845 insertions, 0 deletions

diff --git a/src/java/com/sun/gluegen/pcpp/PCPP.java b/src/java/com/sun/gluegen/pcpp/PCPP.java
new file mode 100644
index 0000000..a2d3ab0
--- /dev/null
+++ b/src/java/com/sun/gluegen/pcpp/PCPP.java
@@ -0,0 +1,845 @@
+/*
+ * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * - Redistribution of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ * - Redistribution in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * 
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * This software is provided "AS IS," without a warranty of any kind. ALL
+ * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
+ * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
+ * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
+ * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
+ * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
+ * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ * 
+ * You acknowledge that this software is not designed or intended for use
+ * in the design, construction, operation or maintenance of any nuclear
+ * facility.
+ * 
+ * Sun gratefully acknowledges that this software was originally authored
+ * and developed by Kenneth Bradley Russell and Christopher John Kline.
+ */
+
+package com.sun.gluegen.pcpp;
+
+import java.io.*;
+import java.util.*;
+
+/** A minimal pseudo-C-preprocessor designed in particular to preserve
+    #define statements defining constants so they can be observed by a
+    glue code generator. */
+
+public class PCPP {
+  private static final boolean disableDebugPrint = true;
+
+  public PCPP(List/*<String>*/ includePaths) {
+    this.includePaths = includePaths;
+    setOut(System.out);
+  }
+
+  public OutputStream out()                    { return out;     }
+  public void         setOut(OutputStream out) { this.out = out; writer = new PrintWriter(out); }
+
+  public void run(Reader reader, String filename) throws IOException {
+    StreamTokenizer tok = new StreamTokenizer(reader);
+    tok.resetSyntax();
+    tok.wordChars('a', 'z');
+    tok.wordChars('A', 'Z');
+    tok.wordChars('0', '9');
+    tok.wordChars('_', '_');
+    tok.wordChars('.', '.');
+    tok.wordChars(128 + 32, 255);
+    tok.whitespaceChars(0, ' ');
+    tok.quoteChar('"');
+    tok.quoteChar('\'');
+    tok.eolIsSignificant(true);
+    tok.slashSlashComments(true);
+    tok.slashStarComments(true);
+    ParseState curState = new ParseState(tok, filename);
+    ParseState oldState = state;
+    state = curState;
+    lineDirective();
+    parse();
+    state = oldState;
+    if (state != null) {
+      lineDirective();
+    }
+  }
+
+  public static void main(String[] args) {
+    try {
+      Reader reader = null;
+      String filename = null;
+
+      if (args.length == 0) {
+        usage();
+      }
+
+      List includePaths = new ArrayList();
+      for (int i = 0; i < args.length; i++) {
+        if (i < args.length - 1) {
+          String arg = args[i];
+          if (arg.startsWith("-I")) {
+            String[] paths = arg.substring(2).split(System.getProperty("path.separator"));
+            for (int j = 0; j < paths.length; j++) {
+              includePaths.add(paths[j]);
+            }
+          } else {
+            usage();
+          }
+        } else {
+          String arg = args[i];
+          if (arg.equals("-")) {
+            reader = new InputStreamReader(System.in);
+            filename = "standard input";
+          } else {
+            if (arg.startsWith("-")) {
+              usage();
+            }
+            filename = arg;
+            reader = new BufferedReader(new FileReader(filename));
+          }
+        }
+      }
+
+      new PCPP(includePaths).run(reader, filename);
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+  }
+
+  public String findFile(String filename) {
+    String sep = File.separator;
+    for (Iterator iter = includePaths.iterator(); iter.hasNext(); ) {
+      String inclPath = (String) iter.next();
+      String fullPath = inclPath + sep + filename;
+      File file = new File(fullPath);
+      if (file.exists()) {
+        return fullPath;
+      }
+    }
+    return null;
+  }
+
+  //----------------------------------------------------------------------
+  // Internals only below this point
+  //
+
+  private static void usage() {
+    System.out.println("Usage: java PCPP [filename | -]");
+    System.out.println("Minimal pseudo-C-preprocessor.");
+    System.out.println("Output goes to standard output. Standard input can be used as input");
+    System.out.println("by passing '-' as the argument.");
+    System.exit(1);
+  }
+
+  /** Map containing the results of #define statements. We must
+      evaluate certain very simple definitions (to properly handle
+      OpenGL's gl.h) but preserve the text of definitions evaluating
+      to constants.  Macros and multi-line defines (which typically
+      contain either macro definitions or expressions) are currently
+      not handled. */
+  private Map/*<String, String>*/ defineMap          = new HashMap();
+  private Set/*<String>*/         nonConstantDefines = new HashSet();
+
+  /** List containing the #include paths as Strings */
+  private List/*<String>*/ includePaths;
+
+  // State
+  static class ParseState {
+    private StreamTokenizer tok;
+    private String          filename;
+    private int             lineNumber;
+    private boolean         startOfLine;
+    private boolean         startOfFile;
+
+    ParseState(StreamTokenizer tok, String filename) {
+      this.tok = tok;
+      this.filename = filename;
+      lineNumber = 1;
+      startOfLine = true;
+      startOfFile = true;
+    }
+
+    StreamTokenizer tok()                       { return tok;          }
+    String          filename()                  { return filename;     }
+    int             lineNumber()                { return tok.lineno(); }
+    boolean         startOfLine()               { return startOfLine;  }
+    void            setStartOfLine(boolean val) { startOfLine = val;   }
+    boolean         startOfFile()               { return startOfFile;  }
+    void            setStartOfFile(boolean val) { startOfFile = val;   }
+  }
+
+  private ParseState  state;
+
+  // Accessors
+
+  private void pushBackToken() throws IOException {
+    state.tok().pushBack();
+  }
+
+  /** Equivalent to nextToken(false) */
+  private int nextToken() throws IOException {
+    return nextToken(false);
+  }
+
+  private int nextToken(boolean returnEOLs) throws IOException {
+    int lineno = lineNumber();
+    // Check to see whether the previous call to nextToken() left an
+    // EOL on the stream
+    if (curToken() == StreamTokenizer.TT_EOL) {
+      state.setStartOfLine(true);
+    } else if (!state.startOfFile()) {
+      state.setStartOfLine(false);
+    }
+    state.setStartOfFile(false);
+    int val = state.tok().nextToken();
+    if (!returnEOLs) {
+      if (val == StreamTokenizer.TT_EOL) {
+        do {
+          // Consume and return next token, setting state appropriately
+          val = state.tok().nextToken();
+          state.setStartOfLine(true);
+          println();
+        } while (val == StreamTokenizer.TT_EOL);
+      }
+    }
+    if (lineNumber() > lineno + 1) {
+      // This is a little noisier than it needs to be, but does handle
+      // the case of multi-line comments properly
+      lineDirective();
+    }
+    return val;
+  }
+  
+  /**
+   * Reads the next token and throws an IOException if it is not the specified
+   * token character.
+   */
+  private void nextRequiredToken(int requiredToken) throws IOException {
+    int nextTok = nextToken();
+    if (nextTok != requiredToken) {
+      String msg = "Expected token '" + requiredToken + "' but got ";
+      switch (nextTok) {
+        case StreamTokenizer.TT_EOF: msg += "<EOF>"; break;
+        case StreamTokenizer.TT_EOL: msg += "<EOL>"; break;    
+        default: msg += "'" + curTokenAsString() + "'"; break;    
+      }
+      msg += " at file " + filename() + ", line " + lineNumber();
+      throw new IOException(msg);
+    }
+  }
+
+  private int curToken() {
+    return state.tok().ttype;
+  }
+
+  private String curTokenAsString() {
+    int t = curToken();
+    if (t == StreamTokenizer.TT_WORD) {
+      return curWord();
+    }
+    if (t == StreamTokenizer.TT_EOL) {
+      throw new RuntimeException("Should not be converting EOL characters to strings");
+    }
+    char c = (char) t;
+    if (c == '"' || c == '\'') {
+      StringBuffer buf = new StringBuffer();
+      buf.append(c);
+      buf.append(state.tok().sval);
+      buf.append(c);
+      return buf.toString();
+    }
+    return new String(new char[] { c });
+  }
+
+  private String nextWord() throws IOException {
+    int val = nextToken();
+    if (val != StreamTokenizer.TT_WORD) {
+      throw new RuntimeException("Expected word at file " + filename() +
+                                 ", line " + lineNumber());
+    }
+    return curWord();
+  }
+
+  private String curWord() {
+    return state.tok().sval;
+  }
+
+  private boolean startOfLine() {
+    return state.startOfLine();
+  }
+
+  private String filename() {
+    return state.filename();
+  }
+
+  private int lineNumber() {
+    return state.lineNumber();
+  }
+
+  /////////////
+  // Parsing //
+  /////////////
+
+  private void parse() throws IOException {
+    int tok = 0;
+    while ((tok = nextToken()) != StreamTokenizer.TT_EOF) {
+      // A '#' at the beginning of a line is a preprocessor directive
+      if (startOfLine() && (tok == '#')) {
+        preprocessorDirective();
+      } else {
+        // Output white space plus current token, handling #defines
+        // (though not properly -- only handling #defines to constants and the empty string)
+        print(" ");
+        String s = curTokenAsString();
+        String newS = (String) defineMap.get(s);
+        if (newS == null) {
+          newS = s;
+        }
+        print(newS);
+      }
+    }
+    flush();
+  }
+
+  private void preprocessorDirective() throws IOException {
+    String w = nextWord();
+    boolean shouldPrint = true;
+    if (w.equals("define")) {
+      handleDefine();
+      shouldPrint = false;
+    } else if (w.equals("undef")) {
+      handleUndefine();
+      shouldPrint = false;
+    } else if (w.equals("if") || w.equals("elif")) {
+      handleIf(w.equals("if"));
+      shouldPrint = false;
+    } else if (w.equals("ifdef") || w.equals("ifndef")) {
+      handleIfdef(w.equals("ifdef"));
+      shouldPrint = false;
+    } else if (w.equals("else")) {
+      handleElse();
+      shouldPrint = false;
+    } else if (w.equals("endif")) {
+      handleEndif();
+      shouldPrint = false;
+    } else if (w.equals("include")) {
+      handleInclude();
+      shouldPrint = false;
+    } else {
+      // Unknown preprocessor directive (#pragma?) -- ignore
+    }
+    if (shouldPrint) {
+      print("# ");
+      printToken();
+    }
+  }
+
+  ////////////////////////////////////
+  // Handling of #define directives //
+  ////////////////////////////////////
+
+  private void handleUndefine() throws IOException {
+    // Next token is the name of the #undef
+    String name = nextWord();
+    
+    debugPrint(true, "#undef " + name);
+
+    // there shouldn't be any extra symbols after the name, but just in case...
+    List values = new ArrayList();
+    while (nextToken(true) != StreamTokenizer.TT_EOL) {
+      values.add(curTokenAsString());
+    }
+
+    if (enabled()) {
+      String oldDef = (String)defineMap.remove(name);
+      if (oldDef == null) {
+          System.err.println("WARNING: ignoring redundant \"#undef " +
+            name + "\", at \"" + filename() + "\" line " + lineNumber() +
+            ": \"" + name + "\" was not previously defined");
+      } else {
+        // System.err.println("UNDEFINED: '" + name + "'  (line " + lineNumber() + " file " + filename() + ")");        
+      }      
+      nonConstantDefines.remove(name);
+    }
+    else System.err.println("FAILED TO UNDEFINE: '" + name + "'  (line " + lineNumber() + " file " + filename() + ")"); 
+  }
+  
+  private void handleDefine() throws IOException {
+    // Next token is the name of the #define
+    String name = nextWord();
+    //System.err.println("IN HANDLE_DEFINE: '" + name + "'  (line " + lineNumber() + " file " + filename() + ")");
+    // (Note that this is not actually proper handling for multi-line #defines)
+    List values = new ArrayList();
+    while (nextToken(true) != StreamTokenizer.TT_EOL) {
+      values.add(curTokenAsString());
+    }
+    // if we're not within an active block of code (like inside an "#ifdef
+    // FOO" where FOO isn't defined), then don't actually alter the definition
+    // map.
+    debugPrint(true, "#define " + name);
+    if (enabled())
+    {
+      boolean emitDefine = true;
+     
+      // Handle #definitions to nothing or to a constant value
+      int sz = values.size();
+      if (sz == 0) {
+        // definition to nothing, like "#define FOO"
+        String oldDef = (String)defineMap.put(name, "");
+        if (oldDef != null) {
+          System.err.println("WARNING: \"" + name + "\" redefined from \"" +
+            oldDef + "\" to \"\"");
+        }
+        // We don't want to emit the define, because it would serve no purpose
+        // and cause GlueGen errors (confuse the GnuCParser)
+        emitDefine = false;
+        //System.out.println("//---DEFINED: " + name + "to \"\"");
+      } else if (sz == 1) {        
+        // See whether the value is a constant
+        String value = (String) values.get(0);
+        if (isConstant(value)) {           
+          // Value is numeric constant like "#define FOO 5".
+          // Put it in the #define map
+          String oldDef = (String)defineMap.put(name, value);
+          if (oldDef != null) {
+            System.err.println("WARNING: \"" + name + "\" redefined from \"" +
+              oldDef + "\" to \"" + value + "\"");
+          }
+          //System.out.println("//---DEFINED: " + name + " to \"" + value + "\"");
+        } else {
+          // Value is a symbolic constant like "#define FOO BAR".
+          // Try to look up the symbol's value
+          String newValue = resolveDefine(value, true);
+          if (newValue != null) {
+            // Set the value to the value of the symbol.
+            //
+            // TO DO: Is this correct? Why not output the symbol unchanged?
+            // I think that it's a good thing to see that some symbols are
+            // defined in terms of others. -chris
+            values.set(0, newValue);
+          }
+          else
+          {
+            // Still perform textual replacement
+            defineMap.put(name, value);
+            nonConstantDefines.add(name);
+            emitDefine = false;
+          }
+        }
+      }
+      else
+      {
+        // Non-constant define; try to do reasonable textual substitution anyway
+        // (FIXME: should identify some of these, like (-1), as constants)
+        emitDefine = false;
+        StringBuffer val = new StringBuffer();
+        for (int i = 0; i < sz; i++) {
+          if (i != 0) {
+            val.append(" ");
+          }
+          val.append(resolveDefine((String) values.get(i), false));
+        }
+        if (defineMap.get(name) != null) {
+          // This is probably something the user should investigate.
+          throw new RuntimeException("Cannot redefine symbol \"" + name +
+            " from \"" + defineMap.get(name) + "\" to non-constant " +
+            " definition \"" + val.toString() + "\"");
+        }
+        defineMap.put(name, val.toString());
+        nonConstantDefines.add(name);
+      }        
+      
+      if (emitDefine)
+      {
+        // Print name and value
+        print("# define ");
+        print(name);
+        for (Iterator iter = values.iterator(); iter.hasNext(); ) {
+          print(" ");
+          print((String) iter.next());
+        }
+        println();
+      }
+
+    } // end if (enabled())
+    
+    //System.err.println("OUT HANDLE_DEFINE: " + name);
+  }
+
+  private boolean isConstant(String s) {
+    if (s.startsWith("0x") || s.startsWith("0X")) {
+      return checkHex(s);
+    } else {
+      return checkDecimal(s);
+    }
+  }
+
+  private boolean checkHex(String s) {
+    for (int i = 2; i < s.length(); i++) {
+      char c = s.charAt(i);
+      if (!((c >= '0' && c <= '9') ||
+            (c >= 'a' && c <= 'f') ||
+            (c >= 'A' && c <= 'F'))) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  private boolean checkDecimal(String s) {
+    try {
+      Float.valueOf(s);
+    }
+    catch (NumberFormatException e) {
+      // not parsable as a number
+      return false;
+    }
+    return true;
+  }
+
+  private String resolveDefine(String word, boolean returnNullIfNotFound) {
+    String lastWord = (String) defineMap.get(word);
+    if (lastWord == null) {
+      if (returnNullIfNotFound) {
+        return null;
+      }
+      return word;
+    }
+    String nextWord = null;
+    do {
+      nextWord = (String) defineMap.get(lastWord);
+      if (nextWord != null) {
+        lastWord = nextWord;
+      }
+    } while (nextWord != null);
+    return lastWord;
+  }
+
+  ////////////////////////////////////////////////
+  // Handling of #if/#ifdef/ifndef/endif directives //
+  ////////////////////////////////////////////////
+
+  /**
+   * @param isIfdef if true, we're processing #ifdef; if false, we're
+   * processing #ifndef.
+   */
+  private void handleIfdef(boolean isIfdef) throws IOException {
+    // Next token is the name of the #ifdef
+    String symbolName = nextWord();
+    debugPrint(true, (isIfdef ? "#ifdef " : "#ifndef ") + symbolName);
+    boolean symbolIsDefined = defineMap.get(symbolName) != null;
+    //debugPrint(true, "HANDLE_IFDEF: ifdef(" + symbolName + ") = " + symbolIsDefined );    
+    pushEnableBit(enabled() && symbolIsDefined == isIfdef);    
+  }
+
+  /** Handles #else directives */
+  private void handleElse() throws IOException {
+    boolean enabledStatusBeforeElse = enabled();
+    popEnableBit();
+    pushEnableBit(enabled() && !enabledStatusBeforeElse);
+    debugPrint(true, "#else ");
+  }
+
+  private void handleEndif() {
+    boolean enabledBeforePopping = enabled();
+    popEnableBit();
+
+    // print the endif if we were enabled prior to popEnableBit() (sending
+    // false to debugPrint means "print regardless of current enabled() state).
+    debugPrint(!enabledBeforePopping, "#endif/end-else");
+  }
+
+  /**
+   * @param isIf if true, we're processing #if; if false, we're
+   * processing #elif.
+   */
+  private void handleIf(boolean isIf) throws IOException {
+    //System.out.println("IN HANDLE_" + (isIf ? "IF" : "ELIF") + " file \"" + filename() + " line " + lineNumber());
+    debugPrint(true, (isIf ? "#if" : "#elif"));
+    boolean defineEvaluatedToTrue = handleIfRecursive(true);
+    if (!isIf) {
+      popEnableBit();
+    }
+    pushEnableBit(defineEvaluatedToTrue);
+    //System.out.println("OUT HANDLE_" + (isIf ? "IF" : "ELIF") +" (evaluated to " + defineEvaluatedToTrue + ")");
+  }
+
+  //static int tmp = -1;
+
+  /**
+   * This method is called recursively to process nested sub-expressions such as: 
+   * <pre>
+   *   #if !defined(OPENSTEP) && !(defined(NeXT) || !defined(NeXT_PDO))
+   *</pre>
+   *
+   * @param greedy if true, continue evaluating sub-expressions until EOL is
+   * reached. If false, return as soon as the first sub-expression is
+   * processed.
+   * @return the value of the sub-expression or (if greedy==true)
+   * series of sub-expressions.
+   */
+  private boolean handleIfRecursive(boolean greedy) throws IOException {
+    //System.out.println("IN HANDLE_IF_RECURSIVE (" + ++tmp + ", greedy = " + greedy + ")"); System.out.flush();
+    
+    // ifValue keeps track of the current value of the potentially nested
+    // "defined()" expressions as we process them.
+    boolean ifValue = true; 
+    int openParens = 0;
+    int tok;
+    do {       
+      tok = nextToken(true);          
+      //System.out.println("-- READ: [" + (tok == StreamTokenizer.TT_EOL ? "<EOL>" :curTokenAsString()) + "]"); 
+      switch (tok) {
+        case '(':
+          ++openParens;
+          //System.out.println("OPEN PARENS = " + openParens);
+          ifValue = ifValue && handleIfRecursive(true);
+          break;
+        case ')':
+          --openParens;
+          //System.out.println("OPEN PARENS = " + openParens);
+          break;
+        case '!':
+        {
+          //System.out.println("HANDLE_IF_RECURSIVE HANDLING !");
+          boolean rhs = handleIfRecursive(false);
+          ifValue = !rhs;
+          //System.out.println("HANDLE_IF_RECURSIVE HANDLED OUT !, RHS = " + rhs);
+        }
+        break;
+        case '&':        
+        {
+          nextRequiredToken('&');
+          //System.out.println("HANDLE_IF_RECURSIVE HANDLING &&, LHS = " + ifValue);
+          boolean rhs = handleIfRecursive(true);
+          //System.out.println("HANDLE_IF_RECURSIVE HANDLED &&, RHS = " + rhs);
+          ifValue = ifValue && rhs;
+        }
+        break;
+        case '|':
+        {
+            nextRequiredToken('|');
+            //System.out.println("HANDLE_IF_RECURSIVE HANDLING ||, LHS = " + ifValue);
+            boolean rhs = handleIfRecursive(true);
+            //System.out.println("HANDLE_IF_RECURSIVE HANDLED ||, RHS = " + rhs);
+            ifValue = ifValue || rhs;
+        }
+        break;
+        case StreamTokenizer.TT_WORD: 
+        {
+          String word = curTokenAsString();
+          if (word.equals("defined")) {
+            // Handle things like #if defined(SOMESYMBOL)
+            nextRequiredToken('(');
+            String symbol = nextWord();
+            boolean isDefined = defineMap.get(symbol) != null;
+            //System.out.println("HANDLE_IF_RECURSIVE HANDLING defined(" + symbol + ") = " + isDefined);
+            ifValue = ifValue && isDefined;
+            nextRequiredToken(')');
+          }
+          else {
+            // Handle things like #if SOME_SYMBOL.
+            String symbolValue = (String)defineMap.get(word);
+
+            // See if the statement is "true"; i.e., a non-zero expression
+            if (symbolValue != null) {
+              // The statement is true if the symbol is defined and is a constant expression
+              return (!nonConstantDefines.contains(word));
+            } else {
+              // The statement is true if the symbol evaluates to a non-zero value
+              // 
+              // NOTE: This doesn't yet handle evaluable expressions like "#if
+              // SOME_SYMBOL > 5" or "#if SOME_SYMBOL == 0", both of which are
+              // valid syntax. It only handles numeric symbols like "#if 1"
+
+              try {
+                // see if it's in decimal form
+                return Double.parseDouble(word) != 0;
+              }
+              catch (NumberFormatException nfe1) {
+                try {
+                  // ok, it's not a valid decimal value, try hex/octal value
+                  return Long.parseLong(word) != 0;
+                }
+                catch (NumberFormatException nfe2) {
+                  try {
+                    // ok, it's not a valid hex/octal value, try boolean
+                    return Boolean.valueOf(word) == Boolean.TRUE;
+                  }
+                  catch (NumberFormatException nfe3) {
+                    // give up; the symbol isn't a numeric or boolean value
+                    return false;
+                  }
+                }
+              }
+            }     
+          } 
+        } // end case TT_WORD
+        break;
+        case StreamTokenizer.TT_EOL:
+          //System.out.println("HANDLE_IF_RECURSIVE HIT <EOL>!");
+          pushBackToken(); // so caller hits EOL as well if we're recursing
+          break; 
+        case StreamTokenizer.TT_EOF: 
+          throw new RuntimeException("Unexpected end of file while parsing " +
+            "#if statement at file " + filename() + ", line " + lineNumber());        
+        
+        default:
+          throw new RuntimeException("Unexpected token (" + curTokenAsString() +
+            ") while parsing " + "#if statement at file " + filename() +
+            ", line " + lineNumber());        
+      }
+      //System.out.println("END OF WHILE: greedy = " + greedy + " parens = " +openParens + " not EOL = " + (tok != StreamTokenizer.TT_EOL) + " --> " + ((greedy && openParens >= 0) && tok != StreamTokenizer.TT_EOL));
+    } while ((greedy && openParens >= 0) && tok != StreamTokenizer.TT_EOL);
+    //System.out.println("OUT HANDLE_IF_RECURSIVE (" + tmp-- + ", returning " + ifValue + ")");
+    //System.out.flush();
+    return ifValue;
+  }
+  
+  /////////////////////////////////////
+  // Handling of #include directives //
+  /////////////////////////////////////
+    
+  private void handleInclude() throws IOException {
+    // Two kinds of #includes: one with quoted string for argument,
+    // one with angle brackets surrounding argument
+    int t = nextToken();
+    String filename = null;
+    if (t == '"') {
+      filename = curWord();
+    } else if (t == '<') {
+      // Components of path name are coming in as separate tokens;
+      // concatenate them
+      StringBuffer buf = new StringBuffer();
+      while ((t = nextToken()) != '>' && (t != StreamTokenizer.TT_EOF)) {
+        buf.append(curTokenAsString());
+      }
+      if (t == StreamTokenizer.TT_EOF) {
+        System.err.println("WARNING: unexpected EOF while processing #include directive");
+      }
+      filename = buf.toString();
+    }
+    // if we're not within an active block of code (like inside an "#ifdef
+    // FOO" where FOO isn't defined), then don't actually process the
+    // #included file.
+    debugPrint(true, "#include [" + filename + "]");
+    if (enabled())
+    {
+      // Look up file in known #include path
+      String fullname = findFile(filename);
+      //System.out.println("ACTIVE BLOCK, LOADING " + filename);
+      if (fullname == null) {
+        System.err.println("WARNING: unable to find #include file \"" + filename + "\"");
+        return;
+      }      
+      // Process this file in-line
+      Reader reader = new BufferedReader(new FileReader(fullname));
+      run(reader, fullname);
+    }
+    else
+    {
+      //System.out.println("INACTIVE BLOCK, SKIPPING " + filename);      
+    }
+  }
+
+  ////////////
+  // Output //
+  ////////////
+
+  private OutputStream out;
+  private PrintWriter  writer;
+  private ArrayList    enabledBits = new ArrayList();
+  
+  private static int debugPrintIndentLevel = 0;
+  private void debugPrint(boolean onlyPrintIfEnabled, String msg)
+  {
+    if (disableDebugPrint) {
+      return;
+    }
+    
+    if (!onlyPrintIfEnabled || (onlyPrintIfEnabled && enabled()))
+    {
+      for (int i = debugPrintIndentLevel; --i >0; ) {
+        System.out.print("  ");
+      }
+      System.out.println(msg + "  (line " + lineNumber() + " file " + filename() + ")");
+    }
+  }
+
+  private void pushEnableBit(boolean enabled) {
+    enabledBits.add(new Boolean(enabled));
+    ++debugPrintIndentLevel;
+    //debugPrint(false, "PUSH_ENABLED, NOW: " + enabled());
+  }
+
+  private void popEnableBit() {
+    if (enabledBits.size() == 0) {
+      System.err.println("WARNING: mismatched #ifdef/endif pairs");
+      return;
+    }
+    enabledBits.remove(enabledBits.size() - 1);
+    --debugPrintIndentLevel;
+    //debugPrint(false, "POP_ENABLED, NOW: " + enabled());
+  }
+
+  private boolean enabled() {
+    return (enabledBits.size() == 0 ||
+            ((Boolean) enabledBits.get(enabledBits.size() - 1)).booleanValue());
+  }
+
+  private void print(String s) {
+    if (enabled()) {
+      writer.print(s);
+      //System.out.print(s);//debug
+    }
+  }
+  
+  private void print(char c) {
+    if (enabled()) {
+      writer.print(c);
+      //System.err.print(c); //debug
+    }
+  }
+
+  private void println() {
+    if (enabled()) {
+      writer.println();
+      //System.err.println();//debug
+    }
+  }
+
+  private void printToken() {
+    print(curTokenAsString());
+  }
+
+  private void flush() {
+    if (enabled()) {
+      writer.flush();
+      //System.err.flush(); //debug
+    }
+  }
+
+  private void lineDirective() {
+    print("#line " + lineNumber() + " \"" + filename() + "\"");
+    println();
+  }
+}