Source Code Cross Referenced for Configurator.java in  » 6.0-JDK-Modules » j2me » config » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » config 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *   
003:         *
004:         * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License version
009:         * 2 only, as published by the Free Software Foundation.
010:         * 
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt).
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA
021:         * 
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions.
025:         */
026:
027:        package config;
028:
029:        import java.io.*;
030:        import java.util.*;
031:        import util.*;
032:
033:        /**
034:         * The Configurator class deals with the creation of jvmconfig.h,
035:         * which controls the build options of the VM (e.g.,
036:         * ENABLE_JAVA_DEBUGGER, ENABLE_CLDC_11, etc).
037:         *
038:         * See src/vm/share/utilities/BuildFlags.hpp about how the content of
039:         * jvmconfig.h is specified.
040:         */
041:        public class Configurator {
042:            Vector flags;
043:            Hashtable platform;
044:            Hashtable product;
045:
046:            public Configurator() {
047:
048:            }
049:
050:            /**
051:             * Read input from platform file, which usually have contents like:
052:             * os_family    = linux
053:             * arch         = i386
054:             * carch        = thumb2
055:             * iarch        = c   
056:             * os_arch      = linux_i386
057:             * compiler     = gcc
058:             * cpu_variant  = 
059:             */
060:            public void readPlatformFile(String infile) throws Exception {
061:                platform = new Hashtable();
062:
063:                readConfigFile(infile, platform);
064:            }
065:
066:            public void readProductFile(String infile) throws Exception {
067:                product = new Hashtable();
068:
069:                readConfigFile(infile, product);
070:            }
071:
072:            private void readConfigFile(String infile, Hashtable properties)
073:                    throws Exception {
074:                FileInputStream in = new FileInputStream(infile);
075:                BufferedReader reader = new BufferedReader(
076:                        new InputStreamReader(in));
077:                String line;
078:
079:                while ((line = reader.readLine()) != null) {
080:                    StringTokenizer st = new StringTokenizer(line, "=");
081:                    String name = null;
082:                    String value = null;
083:
084:                    try {
085:                        name = st.nextToken();
086:                        value = st.nextToken();
087:                    } catch (Throwable t) {
088:                        ;
089:                    }
090:
091:                    if (name == null) {
092:                        continue;
093:                    }
094:                    name = name.trim();
095:                    if (name.equals("")) {
096:                        continue;
097:                    }
098:                    if (value == null) {
099:                        value = "";
100:                    } else {
101:                        value = value.trim();
102:                    }
103:
104:                    properties.put(name, value);
105:                }
106:            }
107:
108:            /**
109:             * Read input from infile (usually BuildFlags.hpp)
110:             */
111:            public void readInputFile(String infile) throws Exception {
112:                FileInputStream in = new FileInputStream(infile);
113:                BufferedReader reader = new BufferedReader(
114:                        new InputStreamReader(in));
115:
116:                String line;
117:                boolean started = false;
118:                EnableFlag currentFlag = null;
119:                flags = new Vector();
120:
121:                while ((line = reader.readLine()) != null) {
122:                    if (line.indexOf("{{ ENABLE_FLAGS_BEGIN") >= 0) {
123:                        started = true;
124:                    } else if (line.indexOf("ENABLE_FLAGS_END }}") >= 0) {
125:                        break;
126:                    } else {
127:                        EnableFlag newFlag = tryStartFlag(line);
128:                        if (newFlag == null) {
129:                            if (currentFlag != null) {
130:                                addComments(currentFlag, line);
131:                            }
132:                        } else {
133:                            flags.addElement(newFlag);
134:                            currentFlag = newFlag;
135:                        }
136:                    }
137:                }
138:            }
139:
140:            /**
141:             * Print a warning if an unknown ENABLE_XXX flag is specified in the
142:             * env. This is probably a typo by the user.
143:             */
144:            void checkSpuriousFlags(Hashtable env) {
145:                boolean warned = false;
146:                Vector names = getFlagNames();
147:                for (Enumeration e = env.keys(); e.hasMoreElements();) {
148:                    String key = (String) e.nextElement();
149:                    if (key.startsWith("ENABLE_") && !key.endsWith("__BY")
150:                            && !key.equals("ENABLE_MAP_FILE")
151:                            && !names.contains(key)) {
152:                        if (!warned) {
153:                            System.out.println("*********");
154:                            warned = true;
155:                        }
156:                        System.out.println("Warning: unknown flag " + key);
157:                    }
158:                }
159:
160:                if (warned) {
161:                    System.out.println("*********");
162:                }
163:            }
164:
165:            /**
166:             * Write the output file. The env hashtable allows the user to specify
167:             * alternative values for the configuration flags.
168:             */
169:            public void write(String outfile, Hashtable env, Vector extra)
170:                    throws Exception {
171:                ByteArrayOutputStream baos = new ByteArrayOutputStream();
172:                PrintWriter writer = new PrintWriter(new OutputStreamWriter(
173:                        baos));
174:                byte data[];
175:
176:                checkSpuriousFlags(env);
177:                writeConfigProlog(writer);
178:                writePlatformFlags(writer);
179:                writeEnableFlags(writer, env);
180:                writeOptionDump(writer);
181:                writeExtraFlags(writer, extra);
182:                writeConfigEpilog(writer);
183:                writer.flush();
184:                data = baos.toByteArray();
185:                writer.close();
186:
187:                writeFileIfNecessary(data, outfile);
188:            }
189:
190:            public void writeFileIfNecessary(byte data[], String outfile)
191:                    throws Exception {
192:                boolean necessary = true;
193:
194:                File f = new File(outfile);
195:                if (f.exists()) {
196:                    FileInputStream in = new FileInputStream(outfile);
197:                    byte savedData[] = new byte[in.available()];
198:                    if (in.read(savedData) == savedData.length) {
199:                        necessary = false;
200:                        for (int i = 0; i < savedData.length; i++) {
201:                            if (data[i] != savedData[i]) {
202:                                necessary = true;
203:                                break;
204:                            }
205:                        }
206:                    }
207:                    in.close();
208:                }
209:
210:                if (necessary) {
211:                    FileOutputStream out = new FileOutputStream(outfile);
212:                    out.write(data);
213:                    out.close();
214:                } else {
215:                    System.out.println("jvmconfig.h has not changed");
216:                }
217:            }
218:
219:            public Vector getFlagNames() {
220:                Vector v = new Vector();
221:                for (int i = 0; i < flags.size(); i++) {
222:                    EnableFlag flag = (EnableFlag) flags.elementAt(i);
223:                    v.addElement(flag.name);
224:                }
225:                return v;
226:            }
227:
228:            public String getDefaultValue(String name) {
229:                Vector v = new Vector();
230:                for (int i = 0; i < flags.size(); i++) {
231:                    EnableFlag flag = (EnableFlag) flags.elementAt(i);
232:                    if (flag.name.equals(name)) {
233:                        if (flag.debug.def != flag.product.def) {
234:                            throw new Error(
235:                                    "Debug and product default values aren't "
236:                                            + "same");
237:                        }
238:                        switch (flag.debug.def) {
239:                        case ALWAYS_DISABLE:
240:                        case DISABLE:
241:                            return "false";
242:                        default:
243:                            return "true";
244:                        }
245:                    }
246:                }
247:                throw new Error("Option \"" + name + "\" not found");
248:            }
249:
250:            public String getProductName() {
251:                return (String) product.get(PRODUCT_NAME_KEY);
252:            }
253:
254:            public String getReleaseVersion() {
255:                return (String) product.get(RELEASE_VERSION_KEY);
256:            }
257:
258:            static final String PRODUCT_NAME_KEY = "PRODUCT_NAME";
259:            static final String RELEASE_VERSION_KEY = "RELEASE_VERSION";
260:
261:            static final int ALWAYS_DISABLE = 1;
262:            static final int DISABLE = 2;
263:            static final int ENABLE = 3;
264:            static final int ALWAYS_ENABLE = 4;
265:
266:            EnableFlag tryStartFlag(String line) {
267:                StringTokenizer st = new StringTokenizer(line, " \t\n\r");
268:                int tokenNumber = 0;
269:                String name = null;
270:                int debugDefault = -1000;
271:                int productDefault = -1000;
272:                String comments = "";
273:
274:                while (st.hasMoreTokens()) {
275:                    String token = st.nextToken();
276:                    switch (tokenNumber) {
277:                    case 0:
278:                        if (token.equals("//")) {
279:                            continue;
280:                        } else if (token.startsWith("ENABLE_")) {
281:                            name = token;
282:                            tokenNumber++;
283:                            continue;
284:                        } else {
285:                            return null;
286:                        }
287:
288:                    case 1:
289:                        if (token.length() != 3) {
290:                            return null;
291:                        }
292:                        if (token.charAt(1) != ',') {
293:                            return null;
294:                        }
295:                        if ((debugDefault = getDefault(token.charAt(0))) < 0) {
296:                            return null;
297:                        }
298:                        if ((productDefault = getDefault(token.charAt(2))) < 0) {
299:                            return null;
300:                        }
301:                        tokenNumber++;
302:                        break;
303:
304:                    default:
305:                        if (token.indexOf("=====") < 0) {
306:                            comments = comments + " " + token;
307:                        }
308:                    }
309:                }
310:
311:                if (tokenNumber <= 1) {
312:                    return null;
313:                }
314:
315:                EnableFlag flag = new EnableFlag();
316:                flag.name = name;
317:                flag.debug.def = debugDefault;
318:                flag.product.def = productDefault;
319:                flag.comments = comments;
320:
321:                return flag;
322:            }
323:
324:            void addComments(EnableFlag flag, String line) {
325:                StringTokenizer st = new StringTokenizer(line, " \t\n\r");
326:                String comments = "";
327:
328:                while (st.hasMoreTokens()) {
329:                    String token = st.nextToken();
330:                    if (token.equals("//") && comments.equals("")) {
331:                        continue;
332:                    } else if (token.indexOf("=====") >= 0) {
333:                        continue;
334:                    } else {
335:                        comments = comments + " " + token;
336:                    }
337:                }
338:                if (comments.length() > 0) {
339:                    flag.comments += " " + comments;
340:                }
341:            }
342:
343:            int getDefault(char c) {
344:                switch (c) {
345:                case '-':
346:                    return ALWAYS_DISABLE;
347:                case '0':
348:                    return DISABLE;
349:                case '1':
350:                    return ENABLE;
351:                case '+':
352:                    return ALWAYS_ENABLE;
353:                default:
354:                    return -1;
355:                }
356:            }
357:
358:            void writeConfigProlog(PrintWriter writer) throws Exception {
359:                InputStream in = Configurator.class
360:                        .getResourceAsStream("config_prolog.txt");
361:                BufferedReader reader = new BufferedReader(
362:                        new InputStreamReader(in));
363:                String line;
364:
365:                while ((line = reader.readLine()) != null) {
366:                    writer.println(line);
367:                }
368:                in.close();
369:            }
370:
371:            void writePlatformFlags(PrintWriter writer) throws Exception {
372:                String arch = (String) platform.get("arch");
373:                String iarch = (String) platform.get("iarch");
374:                String carch = (String) platform.get("carch");
375:                String compiler = (String) platform.get("compiler");
376:
377:                if (iarch == null || iarch.equals("")) {
378:                    iarch = arch;
379:                }
380:                if (carch == null || carch.equals("")) {
381:                    carch = arch;
382:                }
383:
384:                writer.println();
385:                writer
386:                        .println("// BEGIN: Information derived from \"platform\" file");
387:
388:                if (carch.equals("arm") || iarch.equals("arm")) {
389:                    writer.println("#ifndef ARM");
390:                    writer.println("#define ARM 1");
391:                    writer.println("#endif");
392:                } else if (carch.equals("thumb2") || iarch.equals("thumb2")) {
393:                    writer.println("#ifndef ARM");
394:                    writer.println("#define ARM 1");
395:                    writer.println("#endif");
396:                } else if (carch.equals("sh") || iarch.equals("sh")) {
397:                    writer.println("#ifndef HITACHI_SH");
398:                    writer.println("#define HITACHI_SH1");
399:                    writer.println("#endif");
400:                }
401:
402:                writer.println("#define INTERPRETER_ARCH_NAME \"" + iarch
403:                        + "\"");
404:                writer
405:                        .println("// END: Information derived from \"platform\" file");
406:                writer.println();
407:            }
408:
409:            void writeEnableFlags(PrintWriter writer, Hashtable env)
410:                    throws Exception {
411:                for (int i = 0; i < flags.size(); i++) {
412:                    EnableFlag flag = (EnableFlag) flags.elementAt(i);
413:                    writeFlag(writer, env, flag);
414:                }
415:
416:            }
417:
418:            public void writeExtraFlags(PrintWriter writer, Vector extra)
419:                    throws Exception {
420:                for (int i = 0; i < extra.size(); i++) {
421:                    String flag = (String) extra.elementAt(i);
422:                    flag = flag.replace('=', ' ');
423:                    writer.println();
424:                    writer
425:                            .println("/* Extra flag for this build configuration */");
426:                    writer.println("#define " + flag);
427:                }
428:            }
429:
430:            void writeConfigEpilog(PrintWriter writer) throws Exception {
431:                writer.println();
432:                writer.println("#endif /* _JVM_CONFIG_H_ */");
433:                writer.println();
434:            }
435:
436:            void writeFlag(PrintWriter writer, Hashtable env, EnableFlag flag) {
437:                writer.println();
438:                writer.println("/" + "*\n * " + flag.name);
439:                writer.print(" *      ");
440:
441:                int linepos = 0;
442:                StringTokenizer st = new StringTokenizer(flag.comments);
443:                while (st.hasMoreTokens()) {
444:                    String token = st.nextToken();
445:                    if (linepos > 0 && token.length() + linepos > 60) {
446:                        writer.println();
447:                        writer.print(" *      ");
448:                        linepos = 0;
449:                    }
450:                    writer.print(" ");
451:                    writer.print(token);
452:                    linepos += 1 + token.length();
453:                }
454:                writer.println();
455:                writer.println(" *" + "/");
456:                writer.println();
457:
458:                getValue(env, flag.name, flag.debug);
459:                getValue(env, flag.name, flag.product);
460:
461:                if (flag.debug.value == flag.product.value
462:                        && flag.debug.source.equals(flag.product.source)) {
463:                    writeValue(writer, flag.name, flag.debug);
464:                } else {
465:                    writer.println("#ifndef PRODUCT");
466:                    writeValue(writer, flag.name, flag.debug);
467:                    writer.println("#else");
468:                    writeValue(writer, flag.name, flag.product);
469:                    writer.println("#endif");
470:                }
471:            }
472:
473:            void writeValue(PrintWriter writer, String name, FlagValue value) {
474:                int i;
475:                if (name.trim().equals("ENABLE_PCSL")) {
476:                    writer.println("#ifndef " + name);
477:                }
478:                writer.print("#define " + name + " ");
479:                for (i = name.length() + 1; i < 30; i++) {
480:                    writer.print(" ");
481:                }
482:                writer.println((value.value ? "1" : "0") + "  /* "
483:                        + value.source + " */");
484:                if (name.trim().equals("ENABLE_PCSL")) {
485:                    writer.println("#endif");
486:                }
487:            }
488:
489:            void getValue(Hashtable env, String name, FlagValue value) {
490:                String envValue = (String) env.get(name);
491:                String envSource = (String) env.get(name + "__BY");
492:                boolean envDefault = false;
493:
494:                if (envValue != null) {
495:                    if (envValue.equals("true")) {
496:                        envDefault = true;
497:                    } else if (envValue.equals("false")) {
498:                        envDefault = false;
499:                    } else {
500:                        System.out.println("Bad value \"" + envValue
501:                                + "\" for env variable \"" + name + "\"");
502:                        System.out.println("Must be \"true\" or \"false\".\n");
503:                        System.exit(0);
504:                        return;
505:                    }
506:                }
507:
508:                switch (value.def) {
509:                case ALWAYS_DISABLE:
510:                    value.value = false;
511:                    value.source = "Always disabled";
512:                    break;
513:                case ALWAYS_ENABLE:
514:                    value.value = true;
515:                    value.source = "Always enabled";
516:                    break;
517:                default:
518:                    if (envValue == null) {
519:                        value.value = (value.def == ENABLE);
520:                        value.source = "VM default: BuildFlags.hpp";
521:                    } else {
522:                        value.value = envDefault;
523:                        if ("idetool".equals(envSource)) {
524:                            value.source = "User setting in idetool";
525:                        } else if (envSource != null) {
526:                            if (!envSource.startsWith("configurator override:")) {
527:                                value.source = "Platform default: " + envSource;
528:                            } else {
529:                                value.source = envSource;
530:                            }
531:                        } else {
532:                            value.source = "User environment variable";
533:                        }
534:                    }
535:                }
536:            }
537:
538:            /**
539:             * Writes the names and values of the flags into a table, so that
540:             * it's easy for C code to dump the values of the flags (for debugging 
541:             * purposes).
542:             */
543:            void writeOptionDump(PrintWriter writer) {
544:                writer.println();
545:                writer.println("/*");
546:                writer
547:                        .println(" * The following table is for dumping the flags");
548:                writer.println(" * for debugging purposes.");
549:                writer.println(" */");
550:                writer.println();
551:                writer.println("#ifndef PRODUCT");
552:                writeDump(writer, flags, true);
553:                writer.println("#else");
554:                writeDump(writer, flags, false);
555:                writer.println("#endif");
556:            }
557:
558:            void writeDump(PrintWriter writer, Vector flags, boolean isDebug) {
559:                writer.println("#define ENABLE_FLAG_VALUES { \\");
560:                for (int i = 0; i < flags.size(); i++) {
561:                    EnableFlag flag = (EnableFlag) flags.elementAt(i);
562:                    FlagValue value;
563:                    if (isDebug) {
564:                        value = flag.debug;
565:                    } else {
566:                        value = flag.product;
567:                    }
568:                    writer.print("\t\"" + flag.name + "\", ");
569:                    for (int j = flag.name.length(); j < 30; j++) {
570:                        writer.print(" ");
571:                    }
572:                    if (value.value) {
573:                        writer.print("\"enabled\",");
574:                    } else {
575:                        writer.print("\"-\",");
576:                    }
577:                    writer.println(" \\");
578:                }
579:                writer.println("}");
580:            }
581:        }
582:
583:        class EnableFlag {
584:            public String name;
585:            public String comments;
586:            public FlagValue debug;
587:            public FlagValue product;
588:
589:            public EnableFlag() {
590:                debug = new FlagValue();
591:                product = new FlagValue();
592:            }
593:        }
594:
595:        class FlagValue {
596:            public int def;
597:            public String source;
598:            public boolean value;
599:        }
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