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

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » runtime 
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 runtime;
028:
029:        import components.*;
030:        import vm.*;
031:        import jcc.Util;
032:        import jcc.Const;
033:        import jcc.EVMConst;
034:        import util.*;
035:        import java.util.*;
036:        import java.io.OutputStream;
037:
038:        /*
039:         * Generate natives table for VM.
040:         */
041:
042:        public class CLDC_HI_NativesWriter implements  CoreImageWriter, Const,
043:                EVMConst {
044:            /*
045:             * Natives in the VM can be invoked in two ways -- as a "native" or as an 
046:             * "entry". Most methods are of the "native" type, unless specified in the
047:             * following table.
048:             *
049:             * Note [1] that a method can be both "native" and "entry". Example:
050:             *          java.lang.System.arraycopy().
051:             * Note [2] a "entry" method doesn't necessarily have the ACC_NATIVE
052:             *          flag -- the VM may try to execute a simple version of the
053:             *          method in "entry" code. If that fails, it will revert back
054:             *          to the Java implementation. Example: java.lang.String.compareTo
055:             */
056:            static String SYSTEM = "java/lang/System";
057:            static String STRING = "java/lang/String";
058:            static String MATH = "java/lang/Math";
059:            static String VECTOR = "java/util/Vector";
060:            static String STRINGBUFFER = "java/lang/StringBuffer";
061:            static String INTEGER = "java/lang/Integer";
062:            static String JVM = "com/sun/cldchi/jvm/JVM";
063:
064:            static String[][] use_entries = {
065:                    // class     method  signature(null=any)  entry_name
066:                    { SYSTEM, "arraycopy", null,
067:                            "native_system_arraycopy_entry", "also-native" },
068:                    { STRING, "charAt", null, "native_string_charAt_entry" },
069:                    { STRING, "<init>", "(Ljava/lang/StringBuffer;)V",
070:                            "native_string_init_entry" },
071:                    { STRING, "equals", null, "native_string_equals_entry" },
072:                    { STRING, "indexOf", "(Ljava/lang/String;I)I",
073:                            "native_string_indexof_string_entry" },
074:                    { STRING, "indexOf", "(Ljava/lang/String;)I",
075:                            "native_string_indexof0_string_entry" },
076:                    { STRING, "indexOf", "(II)I", "native_string_indexof_entry" },
077:                    { STRING, "indexOf", "(I)I", "native_string_indexof0_entry" },
078:                    { STRING, "startsWith", "(Ljava/lang/String;I)Z",
079:                            "native_string_startsWith_entry" },
080:                    { STRING, "startsWith", "(Ljava/lang/String;)Z",
081:                            "native_string_startsWith0_entry" },
082:                    { STRING, "endsWith", null, "native_string_endsWith_entry" },
083:                    { STRING, "substring", "(I)Ljava/lang/String;",
084:                            "native_string_substringI_entry" },
085:                    { STRING, "substring", "(II)Ljava/lang/String;",
086:                            "native_string_substringII_entry" },
087:                    { STRING, "valueOf", "(I)Ljava/lang/String;",
088:                            "native_integer_toString_entry" },
089:                    { VECTOR, "elementAt", "(I)Ljava/lang/Object;",
090:                            "native_vector_elementAt_entry" },
091:                    { VECTOR, "addElement", "(Ljava/lang/Object;)V",
092:                            "native_vector_addElement_entry" },
093:                    { STRINGBUFFER, "append", "(C)Ljava/lang/StringBuffer;",
094:                            "native_stringbuffer_append_entry" },
095:                    { INTEGER, "toString", "(I)Ljava/lang/String;",
096:                            "native_integer_toString_entry" },
097:                    { MATH, "sin", "(D)D", "native_math_sin_entry" },
098:                    { MATH, "cos", "(D)D", "native_math_cos_entry" },
099:                    { MATH, "tan", "(D)D", "native_math_tan_entry" },
100:                    { MATH, "sqrt", "(D)D", "native_math_sqrt_entry" },
101:                    { MATH, "ceil", "(D)D", "native_math_ceil_entry" },
102:                    { MATH, "floor", "(D)D", "native_math_floor_entry" },
103:                    { JVM, "unchecked_byte_arraycopy", null,
104:                            "native_jvm_unchecked_byte_arraycopy_entry" },
105:                    { JVM, "unchecked_char_arraycopy", null,
106:                            "native_jvm_unchecked_char_arraycopy_entry" },
107:                    { JVM, "unchecked_int_arraycopy", null,
108:                            "native_jvm_unchecked_int_arraycopy_entry" },
109:                    { JVM, "unchecked_long_arraycopy", null,
110:                            "native_jvm_unchecked_long_arraycopy_entry" },
111:                    { JVM, "unchecked_obj_arraycopy", null,
112:                            "native_jvm_unchecked_obj_arraycopy_entry" } };
113:
114:            /* INSTANCE DATA */
115:            protected String outputFileName;
116:            protected Exception failureMode = null; // only interesting on failure
117:
118:            CCodeWriter out;
119:
120:            protected vm.VMClassFactory classMaker = new vm.EVMClassFactory();
121:
122:            boolean formatError;
123:
124:            public CLDC_HI_NativesWriter() {
125:            }
126:
127:            public void init(boolean classDebug,
128:                    ClassnameFilterList nativeTypes, boolean verbose,
129:                    int maxSegmentSize) {
130:            }
131:
132:            public boolean setAttribute(String attribute) {
133:                return false;
134:            }
135:
136:            public boolean open(String filename) {
137:                if (out != null) {
138:                    close();
139:                }
140:                outputFileName = filename;
141:                if (filename == null) {
142:                    out = new CCodeWriter(System.out);
143:                } else {
144:                    try {
145:                        OutputStream os = new java.io.FileOutputStream(filename);
146:                        out = new CCodeWriter(os);
147:                    } catch (java.io.IOException e) {
148:                        failureMode = e;
149:                        return false;
150:                    }
151:                }
152:                return true;
153:            }
154:
155:            public void close() {
156:                if (out != null) {
157:                    out.close();
158:                    outputFileName = null;
159:                    out = null;
160:                }
161:            }
162:
163:            public boolean writeClasses(ConstantPool consts) {
164:                return writeClasses(consts, null);
165:            }
166:
167:            public void printError(java.io.PrintStream o) {
168:                if (failureMode != null) {
169:                    failureMode.printStackTrace(o);
170:                } else {
171:                    if (out != null && out.checkError())
172:                        o.println(outputFileName + ": Output write error");
173:                }
174:            }
175:
176:            public boolean writeClasses(ConstantPool consts,
177:                    ConstantPool sharedconsts) {
178:                ClassClass classes[] = ClassClass.getClassVector(classMaker);
179:                ClassClass.setTypes();
180:
181:                // write out some constant pool stuff here,
182:                writeProlog();
183:
184:                try {
185:                    writeAllNativeTables(classes);
186:                } catch (RuntimeException e) {
187:                    out.flush();
188:                    System.out.println(e);
189:                    e.printStackTrace(System.out);
190:                    formatError = true;
191:                }
192:                writeEpilog();
193:                return (!formatError) && (!out.checkError());
194:            }
195:
196:            int checkEntry(EVMClass cc, MethodInfo mi) {
197:                for (int i = 0; i < use_entries.length; i++) {
198:                    if (cc.ci.className.equals(use_entries[i][0])
199:                            && mi.name.string.equals(use_entries[i][1])) {
200:                        if (use_entries[i][2] == null) {
201:                            return i;
202:                        }
203:                        if (mi.type.string.equals(use_entries[i][2])) {
204:                            return i;
205:                        }
206:                    }
207:                }
208:                return -1;
209:            }
210:
211:            boolean isNativeFunc(EVMClass cc, MethodInfo mi) {
212:                int entry;
213:                entry = checkEntry(cc, mi);
214:                if (entry < 0 || use_entries[entry].length > 4) {
215:                    return true;
216:                } else {
217:                    return false;
218:                }
219:            }
220:
221:            boolean isEntryFunc(EVMClass cc, MethodInfo mi) {
222:                int entry;
223:                entry = checkEntry(cc, mi);
224:                if (entry >= 0) {
225:                    return true;
226:                } else {
227:                    return false;
228:                }
229:            }
230:
231:            boolean isNativeOrEntryFunc(EVMClass cc, MethodInfo mi) {
232:                if ((mi.access & Const.ACC_NATIVE) != 0) {
233:                    return true;
234:                } else {
235:                    return isEntryFunc(cc, mi);
236:                }
237:            }
238:
239:            void sortClasses(ClassClass classes[]) {
240:                ArrayList list = new ArrayList();
241:                for (int i = 0; i < classes.length; i++) {
242:                    list.add(classes[i]);
243:                }
244:                Collections.sort(list, new Comparator() {
245:                    public int compare(Object o1, Object o2) {
246:                        ClassClass c1 = (ClassClass) o1;
247:                        ClassClass c2 = (ClassClass) o2;
248:
249:                        return c1.ci.className.compareTo(c2.ci.className);
250:                    }
251:                });
252:                for (int i = 0; i < list.size(); i++) {
253:                    classes[i] = (ClassClass) list.get(i);
254:                }
255:            }
256:
257:            void sortMethods(EVMMethodInfo methods[]) {
258:                ArrayList list = new ArrayList();
259:                for (int i = 0; i < methods.length; i++) {
260:                    list.add(methods[i]);
261:                }
262:                Collections.sort(list, new Comparator() {
263:                    public int compare(Object o1, Object o2) {
264:                        MethodInfo m1 = ((EVMMethodInfo) o1).method;
265:                        MethodInfo m2 = ((EVMMethodInfo) o2).method;
266:
267:                        int n = m1.name.string.compareTo(m2.name.string);
268:                        if (n != 0) {
269:                            return n;
270:                        } else {
271:                            return m1.type.string.compareTo(m2.type.string);
272:                        }
273:                    }
274:                });
275:                for (int i = 0; i < list.size(); i++) {
276:                    methods[i] = (EVMMethodInfo) list.get(i);
277:                }
278:            }
279:
280:            protected void writeAllNativeTables(ClassClass classes[]) {
281:                sortClasses(classes);
282:                Vector nativeClasses = new Vector();
283:
284:                // (1) Write all the function declarations
285:                for (int i = 0; i < classes.length; i++) {
286:                    boolean classHasNatives = false;
287:                    EVMClass cc = (EVMClass) classes[i];
288:                    if (cc.isPrimitiveClass() || cc.isArrayClass()) {
289:                        continue;
290:                    }
291:                    EVMMethodInfo m[] = cc.methods;
292:                    sortMethods(m);
293:                    int nmethod = (m == null) ? 0 : m.length;
294:                    for (int j = 0; j < nmethod; j++) {
295:                        EVMMethodInfo meth = m[j];
296:                        MethodInfo mi = meth.method;
297:                        if (!isNativeOrEntryFunc(cc, mi)) {
298:                            continue;
299:                        }
300:                        if (!classHasNatives) {
301:                            classHasNatives = true;
302:                            nativeClasses.addElement(cc);
303:                        }
304:                        int entry;
305:                        entry = checkEntry(cc, mi);
306:                        if (entry < 0 || use_entries[entry].length > 4) {
307:                            // This is a "native"
308:                            out.println("extern \"C\" " + mi.getJNIReturnType()
309:                                    + " " + mi.getNativeName(true) + "();");
310:                        }
311:                        if (entry >= 0) {
312:                            // This is an "entry" (could also be a "native")
313:                            out.println("extern \"C\" void "
314:                                    + use_entries[entry][3] + "();");
315:                        }
316:                    }
317:                }
318:                out.println();
319:                out.println();
320:
321:                // (2) Write all the "_natives[]" and "_entries[]" tables for
322:                //     individual classes
323:
324:                for (Enumeration e = nativeClasses.elements(); e
325:                        .hasMoreElements();) {
326:                    EVMClass cc = (EVMClass) e.nextElement();
327:                    EVMMethodInfo m[] = cc.methods;
328:                    int nmethod = (m == null) ? 0 : m.length;
329:                    int num_native_methods = 0;
330:                    int num_entry_methods = 0;
331:
332:                    for (int j = 0; j < nmethod; j++) {
333:                        EVMMethodInfo meth = m[j];
334:                        MethodInfo mi = meth.method;
335:                        if (!isNativeOrEntryFunc(cc, mi)) {
336:                            continue;
337:                        }
338:                        if (isNativeFunc(cc, mi)) {
339:                            num_native_methods++;
340:                        }
341:                        if (isEntryFunc(cc, mi)) {
342:                            num_entry_methods++;
343:                        }
344:                    }
345:
346:                    // Write the "_natives[]" struct
347:                    if (num_native_methods > 0) {
348:                        out.println("static const JvmNativeFunction "
349:                                + cc.getNativeName() + "_natives[] = " + "{");
350:                        for (int j = 0; j < nmethod; j++) {
351:                            EVMMethodInfo meth = m[j];
352:                            MethodInfo mi = meth.method;
353:                            if (!isNativeOrEntryFunc(cc, mi)) {
354:                                continue;
355:                            }
356:                            if (isNativeFunc(cc, mi)) {
357:                                out.print(pad("  JVM_NATIVE(\""
358:                                        + mi.name.string + "\",", 30));
359:                                out.print(pad("\"" + mi.type.string + "\", ",
360:                                        25));
361:                                out.println(mi.getNativeName(true) + "),");
362:                            }
363:                        }
364:                        out.println("  {(char*)0, (char*)0, (void*)0}");
365:                        out.println("};");
366:                        out.println();
367:                    }
368:
369:                    // Write the "_entries[]" struct
370:                    if (num_entry_methods > 0) {
371:                        out.println("static const JvmNativeFunction "
372:                                + cc.getNativeName() + "_entries[] = " + "{");
373:                        for (int j = 0; j < nmethod; j++) {
374:                            EVMMethodInfo meth = m[j];
375:                            MethodInfo mi = meth.method;
376:                            if (!isNativeOrEntryFunc(cc, mi)) {
377:                                continue;
378:                            }
379:                            int entry;
380:                            if ((entry = checkEntry(cc, mi)) >= 0) {
381:                                out.print("  JVM_ENTRY(\"" + mi.name.string
382:                                        + "\","
383:                                        + spaces(20 - mi.name.string.length()));
384:                                out.print("\"" + mi.type.string + "\", ");
385:                                out.println(use_entries[entry][3] + "),");
386:                            }
387:                        }
388:                        out.println("  {(char*)0, (char*)0, (void*)0}");
389:                        out.println("};");
390:                        out.println();
391:                    }
392:                }
393:
394:                // (3) Write the top-level table
395:
396:                out.println("const JvmNativesTable jvm_natives_table[] = {");
397:
398:                for (Enumeration e = nativeClasses.elements(); e
399:                        .hasMoreElements();) {
400:                    EVMClass cc = (EVMClass) e.nextElement();
401:                    String className = cc.ci.className;
402:                    out.println("  JVM_TABLE(\"" + className + "\",");
403:                    EVMMethodInfo m[] = cc.methods;
404:                    int nmethod = (m == null) ? 0 : m.length;
405:
406:                    int num_native_methods = 0;
407:                    int num_entry_methods = 0;
408:
409:                    for (int j = 0; j < nmethod; j++) {
410:                        EVMMethodInfo meth = m[j];
411:                        MethodInfo mi = meth.method;
412:                        if (!isNativeOrEntryFunc(cc, mi)) {
413:                            continue;
414:                        }
415:                        if (isNativeFunc(cc, mi)) {
416:                            num_native_methods++;
417:                        }
418:                        if (isEntryFunc(cc, mi)) {
419:                            num_entry_methods++;
420:                        }
421:                    }
422:
423:                    if (num_native_methods > 0) {
424:                        out.println(spaces(40) + cc.getNativeName()
425:                                + "_natives,");
426:                    } else {
427:                        out.println(spaces(40) + "(JvmNativeFunction*)0,");
428:                    }
429:                    if (num_entry_methods > 0) {
430:                        out.println(spaces(40) + cc.getNativeName()
431:                                + "_entries),");
432:                    } else {
433:                        out.println(spaces(40) + "(JvmNativeFunction*)0),");
434:                    }
435:                }
436:                out.println("  JVM_TABLE((char*)0, (JvmNativeFunction*)0, "
437:                        + "(JvmNativeFunction*)0)");
438:                out.println("};");
439:
440:                // (4) Write the jvm_native_execution_top-level table
441:
442:                out.println("const JvmExecutionEntry jvm_api_entries[] = {");
443:                for (Enumeration e = nativeClasses.elements(); e
444:                        .hasMoreElements();) {
445:                    EVMClass cc = (EVMClass) e.nextElement();
446:                    EVMMethodInfo m[] = cc.methods;
447:                    int nmethod = (m == null) ? 0 : m.length;
448:
449:                    for (int j = 0; j < nmethod; j++) {
450:                        EVMMethodInfo meth = m[j];
451:                        MethodInfo mi = meth.method;
452:                        int index;
453:                        if ((index = checkEntry(cc, mi)) >= 0) {
454:                            String entryName = use_entries[index][3];
455:                            out.println("{(unsigned char*)&" + entryName + ",");
456:                            out.println("(char*)\"" + entryName + "\"},");
457:                        }
458:                    }
459:                }
460:                out.println("{(unsigned char*)0, (char*)0}};");
461:            }
462:
463:            String pad(String str, int width) {
464:                int len = str.length();
465:                if (len < width) {
466:                    return str + spaces(width - len);
467:                } else {
468:                    return str;
469:                }
470:            }
471:
472:            protected void writeProlog() {
473:                out.println("/* This is a generated file.  Do not modify.");
474:                out.println(" * Generated on " + new java.util.Date());
475:                out.println(" */");
476:                out.println();
477:                out.println("/*");
478:                out.println(" *");
479:                out
480:                        .println(" * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.");
481:                out
482:                        .println(" * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER");
483:                out.println(" * ");
484:                out
485:                        .println(" * This program is free software; you can redistribute it and/or");
486:                out
487:                        .println(" * modify it under the terms of the GNU General Public License version");
488:                out
489:                        .println(" * 2 only, as published by the Free Software Foundation.");
490:                out.println(" * ");
491:                out
492:                        .println(" * This program is distributed in the hope that it will be useful, but");
493:                out
494:                        .println(" * WITHOUT ANY WARRANTY; without even the implied warranty of");
495:                out
496:                        .println(" * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU");
497:                out
498:                        .println(" * General Public License version 2 for more details (a copy is");
499:                out.println(" * included at /legal/license.txt).");
500:                out.println(" * ");
501:                out
502:                        .println(" * You should have received a copy of the GNU General Public License");
503:                out
504:                        .println(" * version 2 along with this work; if not, write to the Free Software");
505:                out
506:                        .println(" * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA");
507:                out.println(" * 02110-1301 USA");
508:                out.println(" * ");
509:                out
510:                        .println(" * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa");
511:                out
512:                        .println(" * Clara, CA 95054 or visit www.sun.com if you need additional");
513:                out.println(" * information or have any questions.");
514:                out.println(" */");
515:                out.println();
516:                out.println("#include \"jvmconfig.h\"");
517:                out.println("#if !defined(ROMIZING) || !defined(PRODUCT)");
518:                out.println("#include \"NativesTable.hpp\"");
519:                out.println("#include \"kni.h\"");
520:                out.println();
521:                out.println();
522:            }
523:
524:            protected void writeEpilog() {
525:                out.println();
526:                out.println("#endif");
527:            }
528:
529:            public void printSpaceStats(java.io.PrintStream stream) {
530:            }
531:
532:            private String spaces(int length) {
533:                if (length <= 1) {
534:                    return " ";
535:                }
536:                if (length <= 10) {
537:                    return "          ".substring(0, length);
538:                } else {
539:                    return spaces(10) + spaces(length - 10);
540:                }
541:            }
542:
543:            private boolean isOverloadedNative(MethodInfo mi) {
544:                ClassInfo ci = mi.parent;
545:                int nmethods = ci.methods.length;
546:                for (int j = 0; j < nmethods; j++) {
547:                    MethodInfo m = ci.methods[j];
548:                    if ((m != mi) && ((m.access & Const.ACC_NATIVE) != 0)
549:                            && (m.name.equals(mi.name))) {
550:                        return true;
551:                    }
552:                }
553:                return false;
554:            }
555:
556:        }
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