diff options
Diffstat (limited to 'src/java/com/sun/gluegen/pcpp')
| -rwxr-xr-x | src/java/com/sun/gluegen/pcpp/ConcatenatingReader.java | 174 | ||||
| -rw-r--r-- | src/java/com/sun/gluegen/pcpp/PCPP.java | 873 |
2 files changed, 0 insertions, 1047 deletions
diff --git a/src/java/com/sun/gluegen/pcpp/ConcatenatingReader.java b/src/java/com/sun/gluegen/pcpp/ConcatenatingReader.java deleted file mode 100755 index 90192d2..0000000 --- a/src/java/com/sun/gluegen/pcpp/ConcatenatingReader.java +++ /dev/null @@ -1,174 +0,0 @@ -/* - * Copyright (c) 2006 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.*; - -/** A Reader implementation which finds lines ending in the backslash - character ('\') and concatenates them with the next line. */ - -public class ConcatenatingReader extends FilterReader { - // Any leftover characters go here - private char[] curBuf; - private int curPos; - private BufferedReader in; - private static String newline = System.getProperty("line.separator"); - - /** This class requires that the input reader be a BufferedReader so - it can do line-oriented operations. */ - public ConcatenatingReader(BufferedReader in) { - super(in); - this.in = in; - } - - public int read() throws IOException { - char[] tmp = new char[1]; - int num = read(tmp, 0, 1); - if (num < 0) - return -1; - return tmp[0]; - } - - // It's easier not to support mark/reset since we don't need it - public boolean markSupported() { - return false; - } - - public void mark(int readAheadLimit) throws IOException { - throw new IOException("mark/reset not supported"); - } - - public void reset() throws IOException { - throw new IOException("mark/reset not supported"); - } - - public boolean ready() throws IOException { - if (curBuf != null || in.ready()) - return true; - return false; - } - - public int read(char[] cbuf, int off, int len) throws IOException { - if (curBuf == null) { - nextLine(); - } - - if (curBuf == null) { - return -1; - } - - int numRead = 0; - - while ((len > 0) && (curBuf != null) && (curPos < curBuf.length)) { - cbuf[off] = curBuf[curPos]; - ++curPos; - ++off; - --len; - ++numRead; - if (curPos == curBuf.length) { - nextLine(); - } - } - - return numRead; - } - - public long skip(long n) throws IOException { - long numSkipped = 0; - - while (n > 0) { - int intN = (int) n; - char[] tmp = new char[intN]; - int numRead = read(tmp, 0, intN); - n -= numRead; - numSkipped += numRead; - if (numRead < intN) - break; - } - return numSkipped; - } - - private void nextLine() throws IOException { - String cur = in.readLine(); - if (cur == null) { - curBuf = null; - return; - } - // The trailing newline was trimmed by the readLine() method. See - // whether we have to put it back or not, depending on whether the - // last character of the line is the concatenation character. - int numChars = cur.length(); - boolean needNewline = true; - if ((numChars > 0) && - (cur.charAt(cur.length() - 1) == '\\')) { - --numChars; - needNewline = false; - } - char[] buf = new char[numChars + (needNewline ? newline.length() : 0)]; - cur.getChars(0, numChars, buf, 0); - if (needNewline) { - newline.getChars(0, newline.length(), buf, numChars); - } - curBuf = buf; - curPos = 0; - } - - // Test harness - /* - public static void main(String[] args) throws IOException { - if (args.length != 1) { - System.out.println("Usage: java ConcatenatingReader [file name]"); - System.exit(1); - } - - ConcatenatingReader reader = new ConcatenatingReader(new BufferedReader(new FileReader(args[0]))); - OutputStreamWriter writer = new OutputStreamWriter(System.out); - char[] buf = new char[8192]; - boolean done = false; - while (!done && reader.ready()) { - int numRead = reader.read(buf, 0, buf.length); - writer.write(buf, 0, numRead); - if (numRead < buf.length) - done = true; - } - writer.flush(); - } - */ -} diff --git a/src/java/com/sun/gluegen/pcpp/PCPP.java b/src/java/com/sun/gluegen/pcpp/PCPP.java deleted file mode 100644 index d5d9604..0000000 --- a/src/java/com/sun/gluegen/pcpp/PCPP.java +++ /dev/null @@ -1,873 +0,0 @@ -/* - * 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 = null; - BufferedReader bufReader = null; - if (reader instanceof BufferedReader) { - bufReader = (BufferedReader) reader; - } else { - bufReader = new BufferedReader(reader); - } - tok = new StreamTokenizer(new ConcatenatingReader(bufReader)); - 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(enabled() && defineEvaluatedToTrue == isIf); - //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 '>': - { - // NOTE: we don't handle expressions like this properly - boolean rhs = handleIfRecursive(true); - ifValue = false; - } - break; - case '<': - { - // NOTE: we don't handle expressions like this properly - boolean rhs = handleIfRecursive(true); - ifValue = false; - } - break; - case '=': - { - // NOTE: we don't handle expressions like this properly - boolean rhs = handleIfRecursive(true); - ifValue = false; - } - 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("# " + lineNumber() + " \"" + filename() + "\""); - println(); - } -} |