summaryrefslogtreecommitdiffstats
path: root/src/java/com/sun/gluegen/pcpp/PCPP.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/java/com/sun/gluegen/pcpp/PCPP.java')
-rw-r--r--src/java/com/sun/gluegen/pcpp/PCPP.java1107
1 files changed, 0 insertions, 1107 deletions
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 cced7a6..0000000
--- a/src/java/com/sun/gluegen/pcpp/PCPP.java
+++ /dev/null
@@ -1,1107 +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.BufferedReader;
-import java.io.File;
-import java.io.FileReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.io.OutputStream;
-import java.io.PrintWriter;
-import java.io.Reader;
-import java.io.StreamTokenizer;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.logging.Logger;
-import static java.util.logging.Level.*;
-
-/** 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 Logger LOG = Logger.getLogger(PCPP.class.getPackage().getName());
-
- /** 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<String, String>(128);
- private Map<String, Macro> macroMap = new HashMap<String, Macro>(128);
- private Set<String> nonConstantDefines = new HashSet<String>(128);
-
- /** List containing the #include paths as Strings */
- private List<String> includePaths;
-
- private ParseState state;
-
- private boolean enableDebugPrint;
-
- public PCPP(List<String> includePaths, boolean debug) {
- this.includePaths = includePaths;
- setOut(System.out);
- enableDebugPrint = debug;
- }
-
- 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));
- initTokenizer(tok);
-
- ParseState curState = new ParseState(tok, filename);
- ParseState oldState = state;
- state = curState;
- lineDirective();
- parse();
- state = oldState;
- if (state != null) {
- lineDirective();
- }
- }
-
- private void initTokenizer(StreamTokenizer tok) {
- tok.resetSyntax();
- tok.wordChars('a', 'z');
- tok.wordChars('A', 'Z');
- tok.wordChars('0', '9');
- tok.wordChars('_', '_');
- tok.wordChars('-', '.');
- tok.wordChars(128, 255);
- tok.whitespaceChars(0, ' ');
- tok.quoteChar('"');
- tok.quoteChar('\'');
- tok.eolIsSignificant(true);
- tok.slashSlashComments(true);
- tok.slashStarComments(true);
- }
-
- public String findFile(String filename) {
- String sep = File.separator;
- for (String inclPath : includePaths) {
- String fullPath = inclPath + sep + filename;
- File file = new File(fullPath);
- if (file.exists()) {
- return fullPath;
- }
- }
- return null;
- }
-
- public OutputStream out() {
- return out;
- }
-
- public void setOut(OutputStream out) {
- this.out = out;
- writer = new PrintWriter(out);
- }
-
- // State
- static class ParseState {
-
- private StreamTokenizer tok;
- private String filename;
- private boolean startOfLine;
- private boolean startOfFile;
-
- ParseState(StreamTokenizer tok, String filename) {
- this.tok = tok;
- this.filename = filename;
- startOfLine = true;
- startOfFile = true;
- }
-
- void pushBackToken() throws IOException {
- tok.pushBack();
- }
-
- int curToken() {
- return tok.ttype;
- }
-
- int nextToken() throws IOException {
- return tok.nextToken();
- }
-
- String curWord() {
- return tok.sval;
- }
-
- 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 static class Macro {
-
- private final List<String> values;
- private final List<String> params;
-
- Macro(List<String> params, List<String> values) {
- this.values = values;
- this.params = params;
- }
-
- @Override
- public String toString() {
- return "params: "+params+" values: "+values;
- }
-
- }
-
- // Accessors
-
- /** 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 (state.curToken() == StreamTokenizer.TT_EOL) {
- state.setStartOfLine(true);
- } else if (!state.startOfFile()) {
- state.setStartOfLine(false);
- }
- state.setStartOfFile(false);
- int val = state.nextToken();
- if (!returnEOLs) {
- if (val == StreamTokenizer.TT_EOL) {
- do {
- // Consume and return next token, setting state appropriately
- val = state.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 String curTokenAsString() {
- int t = state.curToken();
- if (t == StreamTokenizer.TT_WORD) {
- return state.curWord();
- }
- if (t == StreamTokenizer.TT_EOL) {
- throw new RuntimeException("Should not be converting EOL characters to strings");
- }
- char c = (char) t;
- if (c == '"' || c == '\'') {
- StringBuilder sb = new StringBuilder();
- sb.append(c);
- sb.append(state.curWord());
- sb.append(c);
- return sb.toString();
- }
- return new String(new char[] { c });
- }
-
- private String nextWordOrString() throws IOException {
- nextToken();
- return curTokenAsString();
- }
-
- private String nextWord() throws IOException {
- int val = nextToken();
- if (val != StreamTokenizer.TT_WORD) {
- throw new RuntimeException("Expected word at file " + filename() +
- ", line " + lineNumber());
- }
- return state.curWord();
- }
-
- 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)
-
- // !!HACK!! - print space only for word tokens. This way multicharacter
- // operators such as ==, != etc. are property printed.
- if (tok == StreamTokenizer.TT_WORD) {
- print(" ");
- }
- String s = curTokenAsString();
- String newS = defineMap.get(s);
- if (newS == null) {
- newS = s;
- }
-
- Macro macro = macroMap.get(newS);
- if(macro != null) {
- newS = "";
- List<String> args = new ArrayList<String>();
- while (nextToken() != StreamTokenizer.TT_EOL) {
- String token = curTokenAsString();
- if(")".equals(token)) {
- break;
- }else if(!",".equals(token) && !"(".equals(token)) {
- args.add(token);
- }
- }
-
- for (int i = 0; i < macro.values.size(); i++) {
- String value = macro.values.get(i);
-
- for (int j = 0; j < macro.params.size(); j++) {
- String param = macro.params.get(j);
- if(param.equals(value)) {
- value = args.get(j);
- break;
- }
- }
-
- if(isIdentifier(value)) {
- newS +=" ";
- }
-
- newS += value;
-
- }
-
- }
-
- print(newS);
- }
- }
- flush();
- }
-
- private void preprocessorDirective() throws IOException {
- String w = nextWord();
- boolean shouldPrint = true;
- if (w.equals("warning")) {
- handleWarning();
- shouldPrint = false;
- } else if (w.equals("error")) {
- handleError();
- shouldPrint = false;
- } else 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<String> values = new ArrayList<String>();
- while (nextToken(true) != StreamTokenizer.TT_EOL) {
- values.add(curTokenAsString());
- }
-
- if (enabled()) {
- String oldDef = defineMap.remove(name);
- if (oldDef == null) {
- LOG.log(WARNING, "ignoring redundant \"#undef {0}\", at \"{1}\" line {2}: \"{3}\" was not previously defined",
- new Object[]{name, filename(), lineNumber(), name});
- } else {
- // System.err.println("UNDEFINED: '" + name + "' (line " + lineNumber() + " file " + filename() + ")");
- }
- nonConstantDefines.remove(name);
- } else {
- LOG.log(WARNING, "FAILED TO UNDEFINE: ''{0}'' (line {1} file {2})", new Object[]{name, lineNumber(), filename()});
- }
- }
-
- private void handleWarning() throws IOException {
- String msg = nextWordOrString();
- if (enabled()) {
- LOG.log(WARNING, "#warning {0} at \"{1}\" line \"{2}\"", new Object[]{msg, filename(), lineNumber()});
- }
- }
-
- private void handleError() throws IOException {
- String msg = nextWordOrString();
- if (enabled()) {
- LOG.log(WARNING, "#error {0} at \"{1}\" line \"{2}\"", new Object[]{msg, filename(), lineNumber()});
- }
- }
-
- private void handleDefine() throws IOException {
-
- // (workaround for not having a lookahead)
- // macro functions have no space between identifier and '('
- // since whitespace is our delimiter we can't determine wether we are dealing with
- // macros or normal defines starting with a brace.
- // this will glue the brace to the token if there is no whitespace between both
- state.tok.wordChars('(', '(');
-
- // Next token is the name of the #define
- String name = nextWord();
-
- boolean macroDefinition = name.contains("(");
-
- //System.err.println("IN HANDLE_DEFINE: '" + name + "' (line " + lineNumber() + " file " + filename() + ")");
- // (Note that this is not actually proper handling for multi-line #defines)
- List<String> values = new ArrayList<String>();
-
- if(macroDefinition) {
- int index = name.indexOf('(');
- String var = name.substring(index+1);
- name = name.substring(0, index);
-
- values.add("(");
- values.add(var);
- }
-
- // restore normal syntax
- state.tok.ordinaryChar('(');
-
- 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 value = "";
- String oldDef = defineMap.put(name, value);
- if (oldDef != null && !oldDef.equals(value)) {
- LOG.log(WARNING, "\"{0}\" redefined from \"{1}\" to \"\"", new Object[]{name, oldDef});
- }
- // 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 = values.get(0);
-
- if (isConstant(value)) {
- // Value is numeric constant like "#define FOO 5".
- // Put it in the #define map
- String oldDef = defineMap.put(name, value);
- if (oldDef != null && !oldDef.equals(value)) {
- LOG.log(WARNING, "\"{0}\" redefined from \"{1}\" to \"{2}\"", new Object[]{name, oldDef, value});
- }
- debugPrint(true, "#define " + name + " ["+oldDef+" ] -> "+value + " CONST");
- //System.out.println("//---DEFINED: " + name + " to \"" + value + "\"");
- } else {
- debugPrint(true, "#define " + name + " -> "+value + " SYMB");
- // 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 if (macroDefinition) {
-
- // list parameters
- List<String> params = new ArrayList<String>();
- for (int i = 1; i < values.size(); i++) {
- String v = values.get(i);
- if(")".equals(v)) { // end of params
- if(i != values.size()-1) {
- values = values.subList(i+1, values.size());
- }else{
- values = Collections.emptyList();
- }
- break;
- }else if(!",".equals(v)) {
- params.add(v);
- }
- }
-
- Macro macro = new Macro(params, values);
- Macro oldDef = macroMap.put(name, macro);
- if (oldDef != null) {
- LOG.log(WARNING, "\"{0}\" redefined from \"{1}\" to \"{2}\"", new Object[]{name, oldDef, macro});
- }
- emitDefine = false;
-
- }else{
-
- // find constant expressions like (1 << 3)
- // if found just pass them through, they will most likely work in java too
- // expressions containing identifiers are currently ignored (casts too)
-
- boolean containsIdentifier = false;
- for (String value : values) {
- if(isIdentifier(value)) {
- containsIdentifier = true;
- break;
- }
- }
-
- //TODO more work here e.g casts are currently not handled
- if(containsIdentifier) { //skip
-
- // Non-constant define; try to do reasonable textual substitution anyway
- // (FIXME: should identify some of these, like (-1), as constants)
- emitDefine = false;
- StringBuilder val = new StringBuilder();
- for (int i = 0; i < sz; i++) {
- if (i != 0) {
- val.append(" ");
- }
- val.append(resolveDefine(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);
-
- }else{ // constant expression -> pass through
-
- StringBuilder sb = new StringBuilder();
- for (String v : values) {
- sb.append(v);
- }
- String value = sb.toString();
-
- String oldDef = defineMap.put(name, value);
- if (oldDef != null && !oldDef.equals(value)) {
- LOG.log(WARNING, "\"{0}\" redefined from \"{1}\" to \"{2}\"", new Object[]{name, oldDef, value});
- }
- debugPrint(true, "#define " + name + " ["+oldDef+" ] -> "+value + " CONST");
-// System.out.println("#define " + name +" "+value + " CONST EXPRESSION");
- }
-
- }
-
- if (emitDefine) {
- // Print name and value
- print("# define ");
- print(name);
- print(" ");
- for (String v : values) {
- print(v);
- }
- println();
- }
-
- } // end if (enabled())
-
- //System.err.println("OUT HANDLE_DEFINE: " + name);
- }
-
- private boolean isIdentifier(String value) {
-
- boolean identifier = false;
-
- char[] chars = value.toCharArray();
-
- for (int i = 0; i < chars.length; i++) {
- char c = chars[i];
- if (i == 0) {
- if (Character.isJavaIdentifierStart(c)) {
- identifier = true;
- }
- } else {
- if (!Character.isJavaIdentifierPart(c)) {
- identifier = false;
- break;
- }
- }
- }
- return identifier;
- }
-
- private boolean isConstant(String s) {
- if (s.startsWith("0x") || s.startsWith("0X")) {
- return checkHex(s);
- } else {
- return checkDecimal(s);
- }
- }
-
- private boolean checkHex(String s) {
- char c='\0';
- int i;
- for (i = 2; i < s.length(); i++) {
- c = s.charAt(i);
- if (!((c >= '0' && c <= '9') ||
- (c >= 'a' && c <= 'f') ||
- (c >= 'A' && c <= 'F'))) {
- break;
- }
- }
- if(i==s.length()) {
- return true;
- } else if(i==s.length()-1) {
- // Const qualifier ..
- return c == 'l' || c == 'L' ||
- c == 'f' || c == 'F' ||
- c == 'u' || c == 'U' ;
- }
- return false;
- }
-
- 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 = defineMap.get(word);
- if (lastWord == null) {
- if (returnNullIfNotFound) {
- return null;
- }
- return word;
- }
- String nextWord = null;
- do {
- nextWord = 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, (isIfdef ? "#ifdef " : "#ifndef ") + symbolName + "(defined: "+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);
- //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 = 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>!");
- state.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 = state.curWord();
- } else if (t == '<') {
- // Components of path name are coming in as separate tokens;
- // concatenate them
- StringBuilder buf = new StringBuilder();
- while ((t = nextToken()) != '>' && (t != StreamTokenizer.TT_EOF)) {
- buf.append(curTokenAsString());
- }
- if (t == StreamTokenizer.TT_EOF) {
- LOG.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) {
- LOG.log(WARNING, "unable to find #include file \"{0}\"", 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 List<Boolean> enabledBits = new ArrayList<Boolean>();
-
- private static int debugPrintIndentLevel = 0;
-
- private void debugPrint(boolean onlyPrintIfEnabled, String msg) {
- if (!enableDebugPrint) {
- 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(enabled);
- ++debugPrintIndentLevel;
- debugPrint(false, "PUSH_ENABLED, NOW: " + enabled());
- }
-
- private void popEnableBit() {
- if (enabledBits.isEmpty()) {
- LOG.warning("mismatched #ifdef/endif pairs");
- return;
- }
- enabledBits.remove(enabledBits.size() - 1);
- --debugPrintIndentLevel;
- debugPrint(false, "POP_ENABLED, NOW: " + enabled());
- }
-
- private boolean enabled() {
- return (enabledBits.isEmpty() || enabledBits.get(enabledBits.size() - 1));
- }
-
- 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();
- }
-
- 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.out.println(" --debug enables debug mode");
- System.exit(1);
- }
-
- public static void main(String[] args) throws IOException {
- Reader reader = null;
- String filename = null;
- boolean debug = false;
-
- if (args.length == 0) {
- usage();
- }
-
- List<String> includePaths = new ArrayList<String>();
- 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 if (arg.equals("--debug")) {
- debug = true;
- } 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, debug).run(reader, filename);
- }
-
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 20:00:33 +0000