src/native/native.c

   1 /* native.c - table of native functions
   2
   3    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
   4    R. Grafl, A. Krall, C. Kruegel, C. Oates, R. Obermaisser,
   5    M. Probst, S. Ring, E. Steiner, C. Thalinger, D. Thuernbeck,
   6    P. Tomsich, J. Wenninger
   7
   8    This file is part of CACAO.
   9
  10    This program is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU General Public License as
  12    published by the Free Software Foundation; either version 2, or (at
  13    your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful, but
  16    WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  23    02111-1307, USA.
  24
  25    Contact: cacao@complang.tuwien.ac.at
  26
  27    Authors: Reinhard Grafl
  28             Roman Obermaisser
  29             Andreas Krall
  30
  31    The .hh files created with the header file generator are all
  32    included here as are the C functions implementing these methods.
  33
  34    $Id: native.c 1113 2004-06-02 10:31:09Z twisti $
  35
  36 */
  37
  38
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41 #include <time.h>
  42 #include <math.h>
  43 #include <string.h>
  44 #include <assert.h>
  45 #include <sys/time.h>
  46 #include <utime.h>
  47
  48 #include "config.h"
  49 #include "global.h"
  50 #include "main.h"
  51 #include "jni.h"
  52 #include "native.h"
  53 #include "nativetypes.hh"
  54 #include "builtin.h"
  55 #include "asmpart.h"
  56 #include "tables.h"
  57 #include "loader.h"
  58 #include "jni.h"
  59 #include "jit/jit.h"
  60 #include "toolbox/logging.h"
  61 #include "toolbox/memory.h"
  62 #include "threads/thread.h"
  63 #include "threads/threadio.h"
  64 #include "threads/locks.h"
  65 #include "nat/java_lang_VMClass.h"
  66 #include "nat/java_lang_Throwable.h"
  67
  68 /* Include files for IO functions */
  69
  70 #include <fcntl.h>
  71 #include <dirent.h>
  72 #include <sys/types.h>
  73 #ifdef _OSF_SOURCE
  74 #include <sys/mode.h>
  75 #endif
  76 #include <sys/stat.h>
  77
  78 #include "threads/threadio.h"
  79
  80 /* searchpath for classfiles */
  81 char *classpath;
  82
  83 /* for java-string to char conversion */
  84 #define MAXSTRINGSIZE 1000
  85
  86
  87 /******************** systemclasses required for native methods ***************/
  88
  89 classinfo *class_java_lang_Class;
  90 classinfo *class_java_lang_VMClass;
  91 classinfo *class_java_lang_System;
  92 classinfo *class_java_lang_ClassLoader;
  93 classinfo *class_gnu_java_lang_SystemClassLoader;
  94 classinfo *class_java_lang_SecurityManager;
  95 classinfo *class_java_lang_Double;
  96 classinfo *class_java_lang_Float;
  97 classinfo *class_java_lang_Long;
  98 classinfo *class_java_lang_Byte;
  99 classinfo *class_java_lang_Short;
 100 classinfo *class_java_lang_Boolean;
 101 classinfo *class_java_lang_Void;
 102 classinfo *class_java_lang_Character;
 103 classinfo *class_java_lang_Integer;
 104
 105 methodinfo *method_vmclass_init;
 106
 107
 108 /* system exception classes required while compiling */
 109
 110 classinfo *class_java_lang_Throwable;
 111
 112
 113 /* exception/error super class */
 114
 115 char *string_java_lang_Throwable =
 116     "java/lang/Throwable";
 117
 118 char *string_java_lang_VMThrowable =
 119     "java/lang/VMThrowable";
 120
 121
 122 /* specify some exception strings for code generation */
 123
 124 char *string_java_lang_ArithmeticException =
 125     "java/lang/ArithmeticException";
 126
 127 char *string_java_lang_ArithmeticException_message =
 128     "/ by zero";
 129
 130 char *string_java_lang_ArrayIndexOutOfBoundsException =
 131     "java/lang/ArrayIndexOutOfBoundsException";
 132
 133 char *string_java_lang_ArrayStoreException =
 134     "java/lang/ArrayStoreException";
 135
 136 char *string_java_lang_ClassCastException =
 137     "java/lang/ClassCastException";
 138
 139 char *string_java_lang_ClassNotFoundException =
 140         "java/lang/ClassNotFoundException";
 141
 142 char *string_java_lang_CloneNotSupportedException =
 143     "java/lang/CloneNotSupportedException";
 144
 145 char *string_java_lang_Exception =
 146     "java/lang/Exception";
 147
 148 char *string_java_lang_IllegalArgumentException =
 149     "java/lang/IllegalArgumentException";
 150
 151 char *string_java_lang_IllegalMonitorStateException =
 152     "java/lang/IllegalMonitorStateException";
 153
 154 char *string_java_lang_NegativeArraySizeException =
 155     "java/lang/NegativeArraySizeException";
 156
 157 char *string_java_lang_NoSuchFieldException =
 158         "java/lang/NoSuchFieldException";
 159
 160 char *string_java_lang_NoSuchMethodException =
 161         "java/lang/NoSuchMethodException";
 162
 163 char *string_java_lang_NullPointerException =
 164     "java/lang/NullPointerException";
 165
 166
 167 /* specify some error strings for code generation */
 168
 169 char *string_java_lang_AbstractMethodError =
 170     "java/lang/AbstractMethodError";
 171
 172 char *string_java_lang_ClassCircularityError =
 173     "java/lang/ClassCircularityError";
 174
 175 char *string_java_lang_ClassFormatError =
 176     "java/lang/ClassFormatError";
 177
 178 char *string_java_lang_Error =
 179     "java/lang/Error";
 180
 181 char *string_java_lang_ExceptionInInitializerError =
 182     "java/lang/ExceptionInInitializerError";
 183
 184 char *string_java_lang_IncompatibleClassChangeError =
 185     "java/lang/IncompatibleClassChangeError";
 186
 187 char *string_java_lang_InternalError =
 188     "java/lang/InternalError";
 189
 190 char *string_java_lang_LinkageError =
 191     "java/lang/LinkageError";
 192
 193 char *string_java_lang_NoClassDefFoundError =
 194     "java/lang/NoClassDefFoundError";
 195
 196 char *string_java_lang_NoSuchFieldError =
 197         "java/lang/NoSuchFieldError";
 198
 199 char *string_java_lang_NoSuchMethodError =
 200         "java/lang/NoSuchMethodError";
 201
 202 char *string_java_lang_OutOfMemoryError =
 203     "java/lang/OutOfMemoryError";
 204
 205 char *string_java_lang_VerifyError =
 206     "java/lang/VerifyError";
 207
 208 char *string_java_lang_VirtualMachineError =
 209     "java/lang/VirtualMachineError";
 210
 211
 212 /* the system classloader object */
 213 struct java_lang_ClassLoader *SystemClassLoader = NULL;
 214
 215 /* for raising exceptions from native methods */
 216 #if !defined(USE_THREADS) || !defined(NATIVE_THREADS)
 217 java_objectheader* _exceptionptr = NULL;
 218 #endif
 219
 220 /************* use classinfo structure as java.lang.Class object **************/
 221
 222 void use_class_as_object(classinfo *c)
 223 {
 224 /*      vftbl *vt; */
 225 /*      vftbl *newtbl; */
 226         java_objectheader *vmo;
 227
 228 /*      vt = class_java_lang_Class->vftbl; */
 229
 230         if (!c->classvftbl) {
 231                 c->classvftbl = true;
 232
 233                 /*                copy_vftbl(&newtbl, vt);
 234                                                   newtbl->class = c->header.vftbl->class;
 235                                                   newtbl->baseval = c->header.vftbl->baseval;
 236                                                   newtbl->diffval = c->header.vftbl->diffval;
 237                                                   c->header.vftbl = newtbl;*/
 238
 239                 c->header.vftbl = class_java_lang_Class->vftbl;
 240
 241                 method_vmclass_init =
 242                         class_findmethod(class_java_lang_VMClass,
 243                                                          utf_new_char("<init>"),
 244                                                          utf_new_char("(Lgnu/classpath/RawData;)V"));
 245
 246                 if (method_vmclass_init == 0) {
 247                         class_showmethods(class_java_lang_VMClass);
 248                         panic("Needed class initializer for VMClass could not be found");
 249                 }
 250
 251                 vmo = builtin_new(class_java_lang_VMClass);
 252
 253                 if (!vmo)
 254                         panic("Error while creating instance of java/lang/VMClass");
 255
 256                 asm_calljavafunction(method_vmclass_init, vmo, c, NULL, NULL);
 257
 258                 c->vmClass = (java_lang_VMClass *) vmo;
 259 #if 0
 260                 setfield_critical(class_java_lang_Class,vmo,"vmClass",          "Ljava/lang/VMClass;",  jobject, (jobject) class_java_lang_Class /*this*/);
 261 #endif
 262
 263         }
 264
 265 }
 266
 267
 268 /*************************** include native methods ***************************/
 269
 270 #ifdef USE_GTK
 271 #include "nat/GdkGraphics.c"
 272 #include "nat/GtkComponentPeer.c"
 273 #include "nat/GdkPixbufDecoder.c"
 274 #include "nat/GtkScrollPanePeer.c"
 275 #include "nat/GtkFileDialogPeer.c"
 276 #include "nat/GtkLabelPeer.c"
 277 #endif
 278
 279
 280 /************************** tables for methods ********************************/
 281
 282 #undef JOWENN_DEBUG
 283 #undef JOWENN_DEBUG1
 284
 285 /* table for locating native methods */
 286 static struct nativeref {
 287         char *classname;
 288         char *methodname;
 289         char *descriptor;
 290         bool isstatic;
 291         functionptr func;
 292 } nativetable [] = {
 293
 294 #include "nativetable.hh"
 295
 296 };
 297
 298
 299 #define NATIVETABLESIZE  (sizeof(nativetable)/sizeof(struct nativeref))
 300
 301 /* table for fast string comparison */
 302 static struct nativecompref {
 303         utf *classname;
 304         utf *methodname;
 305         utf *descriptor;
 306         bool isstatic;
 307         functionptr func;
 308 } nativecomptable [NATIVETABLESIZE];
 309
 310 /* string comparsion table initialized */
 311 static bool nativecompdone = false;
 312
 313
 314 /******************************************************************************/
 315 /******************************************************************************/
 316 #include "natcalls.h"
 317
 318 /* string call comparison table initialized */
 319
 320 /******************************************************************************/
 321 /******************************************************************************/
 322
 323 /* init_system_exceptions *****************************************************
 324
 325    load, link and compile exceptions used in the system
 326
 327 *******************************************************************************/
 328
 329 void init_system_exceptions()
 330 {
 331         classinfo *c;
 332
 333         /* java/lang/Throwable */
 334
 335         class_java_lang_Throwable =
 336                 class_new(utf_new_char(string_java_lang_Throwable));
 337         class_load(class_java_lang_Throwable);
 338         class_link(class_java_lang_Throwable);
 339         compile_all_class_methods(class_java_lang_Throwable);
 340
 341         /* java/lang/VMThrowable */
 342
 343         c = class_new(utf_new_char(string_java_lang_VMThrowable));
 344         class_load(c);
 345         class_link(c);
 346         compile_all_class_methods(c);
 347
 348         /* java/lang/ClassFormatError */
 349
 350         c = class_new(utf_new_char(string_java_lang_ClassFormatError));
 351         class_load(c);
 352         class_link(c);
 353         compile_all_class_methods(c);
 354
 355         /* java/lang/Error */
 356
 357         c = class_new(utf_new_char(string_java_lang_Error));
 358         class_load(c);
 359         class_link(c);
 360         compile_all_class_methods(c);
 361
 362         /* java/lang/Exception */
 363
 364         c = class_new(utf_new_char(string_java_lang_Exception));
 365         class_load(c);
 366         class_link(c);
 367         compile_all_class_methods(c);
 368
 369         /* java/lang/IncompatibleClassChangeError */
 370
 371         c = class_new(utf_new_char(string_java_lang_IncompatibleClassChangeError));
 372         class_load(c);
 373         class_link(c);
 374         compile_all_class_methods(c);
 375
 376         /* java/lang/LinkageError */
 377
 378         c = class_new(utf_new_char(string_java_lang_LinkageError));
 379         class_load(c);
 380         class_link(c);
 381         compile_all_class_methods(c);
 382
 383         /* java/lang/NoClassDefFoundError */
 384
 385         c = class_new(utf_new_char(string_java_lang_NoClassDefFoundError));
 386         class_load(c);
 387         class_link(c);
 388         compile_all_class_methods(c);
 389
 390         /* java/lang/NoSuchFieldError */
 391
 392         c = class_new(utf_new_char(string_java_lang_NoSuchFieldError));
 393         class_load(c);
 394         class_link(c);
 395         compile_all_class_methods(c);
 396
 397         /* java/lang/NoSuchMethodError */
 398
 399         c = class_new(utf_new_char(string_java_lang_NoSuchMethodError));
 400         class_load(c);
 401         class_link(c);
 402         compile_all_class_methods(c);
 403
 404         /* java/lang/OutOfMemoryError */
 405
 406         c = class_new(utf_new_char(string_java_lang_OutOfMemoryError));
 407         class_load(c);
 408         class_link(c);
 409         compile_all_class_methods(c);
 410
 411         /* java/lang/VerifyError */
 412
 413         c = class_new(utf_new_char(string_java_lang_VerifyError));
 414         class_load(c);
 415         class_link(c);
 416         compile_all_class_methods(c);
 417
 418         /* java/lang/VirtualMachineError */
 419
 420         c = class_new(utf_new_char(string_java_lang_VirtualMachineError));
 421         class_load(c);
 422         class_link(c);
 423         compile_all_class_methods(c);
 424 }
 425
 426
 427 void compile_all_class_methods(classinfo *c)
 428 {
 429         s4 i;
 430
 431         for (i = 0; i < c->methodscount; i++) {
 432                 (void) jit_compile(&(c->methods[i]));
 433         }
 434 }
 435
 436
 437 void throw_exception_exit()
 438 {
 439         java_objectheader *xptr;
 440         classinfo *c;
 441         methodinfo *pss;
 442
 443         if (*exceptionptr) {
 444                 xptr = *exceptionptr;
 445
 446                 /* clear exception, because we are calling jit code again */
 447                 *exceptionptr = NULL;
 448
 449                 fprintf(stderr, "Exception in thread \"main\" ");
 450                 fflush(stderr);
 451
 452                 c = xptr->vftbl->class;
 453
 454 /*              ts = class_resolveclassmethod(c, */
 455 /*                                                                        utf_new_char("toString"), */
 456 /*                                                                        utf_new_char("()Ljava/lang/String;"), */
 457 /*                                                                        class_java_lang_Object, */
 458 /*                                                                        false); */
 459
 460 /*              if (!ts) { */
 461 /*                      panic("internal error"); */
 462 /*              } */
 463
 464 /*              tostring = asm_calljavafunction(ts, xptr, NULL, NULL, NULL); */
 465
 466 /*              utf_display(javastring_toutf(tostring, false)); */
 467
 468                 pss = class_resolveclassmethod(c,
 469                                                                            utf_new_char("printStackTrace"),
 470                                                                            utf_new_char("()V"),
 471                                                                            class_java_lang_Object,
 472                                                                            false);
 473
 474                 /* print the stacktrace */
 475                 if (pss) {
 476                         asm_calljavafunction(pss, xptr, NULL, NULL, NULL);
 477
 478                         /* this normally means, we are EXTREMLY out of memory, but may be
 479                            any other exception */
 480                         if (*exceptionptr) {
 481                                 utf_fprint_classname(stderr, c->name);
 482                                 fprintf(stderr, "\n");
 483                         }
 484
 485                 } else {
 486                         utf_fprint_classname(stderr, c->name);
 487                         fprintf(stderr, ": printStackTrace()V not found!\n");
 488                 }
 489
 490                 fflush(stderr);
 491
 492                 /* good bye! */
 493                 exit(1);
 494         }
 495 }
 496
 497
 498 void throw_cacao_exception_exit(char *exception, char *message)
 499 {
 500         s4 i;
 501         char *tmp;
 502         s4 len;
 503
 504         len = strlen(exception);
 505         tmp = MNEW(char, len);
 506         strncpy(tmp, exception, len);
 507
 508         /* convert to classname */
 509
 510         for (i = len - 1; i >= 0; i--) {
 511                 if (tmp[i] == '/') tmp[i] = '.';
 512         }
 513
 514         fprintf(stderr, "Exception in thread \"main\" %s", tmp);
 515
 516         MFREE(tmp, char, len);
 517
 518         if (strlen(message) > 0)
 519                 fprintf(stderr, ": %s", message);
 520
 521         fprintf(stderr, "\n");
 522         fflush(stderr);
 523
 524         /* good bye! */
 525         exit(1);
 526 }
 527
 528
 529 #define CREATENEW_EXCEPTION(ex) \
 530         java_objectheader *newEx; \
 531         java_objectheader *oldexception=*exceptionptr;\
 532         *exceptionptr=0;\
 533         newEx=ex;\
 534         *exceptionptr=oldexception;\
 535         return newEx;
 536
 537 java_objectheader *new_exception(char *classname)
 538 {
 539         classinfo *c = class_new(utf_new_char(classname));
 540
 541         CREATENEW_EXCEPTION(native_new_and_init(c));
 542 }
 543
 544 java_objectheader *new_exception_message(char *classname, char *message)
 545 {
 546         classinfo *c = class_new(utf_new_char(classname));
 547
 548         CREATENEW_EXCEPTION(native_new_and_init_string(c, javastring_new_char(message)));
 549 }
 550
 551
 552 java_objectheader *new_exception_throwable(char *classname, java_lang_Throwable *throwable)
 553 {
 554         classinfo *c = class_new(utf_new_char(classname));
 555
 556         CREATENEW_EXCEPTION(native_new_and_init_throwable(c, throwable));
 557 }
 558
 559
 560 java_objectheader *new_exception_utfmessage(char *classname, utf *message)
 561 {
 562         classinfo *c = class_new(utf_new_char(classname));
 563
 564         CREATENEW_EXCEPTION(native_new_and_init_string(c, javastring_new(message)));
 565 }
 566
 567
 568 java_objectheader *new_exception_javastring(char *classname, java_lang_String *message)
 569 {
 570         classinfo *c = class_new(utf_new_char(classname));
 571
 572         CREATENEW_EXCEPTION(native_new_and_init_string(c, message));
 573 }
 574
 575
 576 java_objectheader *new_exception_int(char *classname, s4 i)
 577 {
 578         classinfo *c = class_new(utf_new_char(classname));
 579
 580         CREATENEW_EXCEPTION(native_new_and_init_int(c, i));
 581 }
 582
 583
 584 /*********************** function: native_loadclasses **************************
 585
 586         load classes required for native methods
 587
 588 *******************************************************************************/
 589
 590 void native_loadclasses()
 591 {
 592         static int classesLoaded = 0; /*temporary hack JoWenn*/
 593
 594         if (classesLoaded)
 595                 return;
 596
 597         classesLoaded = 1;
 598
 599         class_java_lang_Cloneable =
 600                 class_new(utf_new_char("java/lang/Cloneable"));
 601         class_load(class_java_lang_Cloneable);
 602         class_link(class_java_lang_Cloneable);
 603
 604         class_java_lang_Class =
 605                 class_new(utf_new_char("java/lang/Class"));
 606         class_load(class_java_lang_Class);
 607         class_link(class_java_lang_Class);
 608
 609         class_java_lang_VMClass =
 610                 class_new(utf_new_char("java/lang/VMClass"));
 611         class_load(class_java_lang_VMClass);
 612         class_link(class_java_lang_VMClass);
 613
 614         class_java_lang_ClassLoader =
 615                 class_new(utf_new_char("java/lang/ClassLoader"));
 616         class_load(class_java_lang_ClassLoader);
 617         class_link(class_java_lang_ClassLoader);
 618
 619         /* load classes for wrapping primitive types */
 620         class_java_lang_Double = class_new(utf_new_char("java/lang/Double"));
 621         class_load(class_java_lang_Double);
 622         class_link(class_java_lang_Double);
 623
 624         class_java_lang_Float = class_new(utf_new_char("java/lang/Float"));
 625         class_load(class_java_lang_Float);
 626         class_link(class_java_lang_Float);
 627
 628         class_java_lang_Character =     class_new(utf_new_char("java/lang/Character"));
 629         class_load(class_java_lang_Character);
 630         class_link(class_java_lang_Character);
 631
 632         class_java_lang_Integer = class_new(utf_new_char("java/lang/Integer"));
 633         class_load(class_java_lang_Integer);
 634         class_link(class_java_lang_Integer);
 635
 636         class_java_lang_Long = class_new(utf_new_char("java/lang/Long"));
 637         class_load(class_java_lang_Long);
 638         class_link(class_java_lang_Long);
 639
 640         class_java_lang_Byte = class_new(utf_new_char("java/lang/Byte"));
 641         class_load(class_java_lang_Byte);
 642         class_link(class_java_lang_Byte);
 643
 644         class_java_lang_Short = class_new(utf_new_char("java/lang/Short"));
 645         class_load(class_java_lang_Short);
 646         class_link(class_java_lang_Short);
 647
 648         class_java_lang_Boolean = class_new(utf_new_char("java/lang/Boolean"));
 649         class_load(class_java_lang_Boolean);
 650         class_link(class_java_lang_Boolean);
 651
 652         class_java_lang_Void = class_new(utf_new_char("java/lang/Void"));
 653         class_load(class_java_lang_Void);
 654         class_link(class_java_lang_Void);
 655 }
 656
 657
 658 /*****************************************************************************
 659
 660         create systemclassloader object and initialize instance fields
 661
 662 ******************************************************************************/
 663
 664 void init_systemclassloader()
 665 {
 666         log_text("init_systemclassloader");
 667         if (!SystemClassLoader) {
 668                 native_loadclasses();
 669                 log_text("Initializing new system class loader");
 670                 /* create object and call initializer */
 671                 SystemClassLoader = (java_lang_ClassLoader *) native_new_and_init(class_new(utf_new_char("gnu/java/lang/SystemClassLoader")));
 672
 673                 /* systemclassloader has no parent */
 674                 SystemClassLoader->parent      = NULL;
 675                 SystemClassLoader->initialized = true;
 676         }
 677         log_text("leaving system class loader");
 678 }
 679
 680
 681 /********************* function: native_setclasspath **************************/
 682
 683 void native_setclasspath(char *path)
 684 {
 685         /* set searchpath for classfiles */
 686         classpath = path;
 687 }
 688
 689
 690 /*********************** Function: native_findfunction *************************
 691
 692         Looks up a method (must have the same class name, method name, descriptor
 693         and 'static'ness) and returns a function pointer to it.
 694         Returns: function pointer or NULL (if there is no such method)
 695
 696         Remark: For faster operation, the names/descriptors are converted from C
 697                 strings to Unicode the first time this function is called.
 698
 699 *******************************************************************************/
 700
 701 functionptr native_findfunction(utf *cname, utf *mname,
 702                                                                 utf *desc, bool isstatic)
 703 {
 704         int i;
 705         /* entry of table for fast string comparison */
 706         struct nativecompref *n;
 707         /* for warning message if no function is found */
 708         char *buffer;
 709         int buffer_len;
 710
 711         isstatic = isstatic ? true : false;
 712
 713         if (!nativecompdone) {
 714                 for (i = 0; i < NATIVETABLESIZE; i++) {
 715                         nativecomptable[i].classname  =
 716                                 utf_new_char(nativetable[i].classname);
 717                         nativecomptable[i].methodname =
 718                                 utf_new_char(nativetable[i].methodname);
 719                         nativecomptable[i].descriptor =
 720                                 utf_new_char(nativetable[i].descriptor);
 721                         nativecomptable[i].isstatic   =
 722                                 nativetable[i].isstatic;
 723                         nativecomptable[i].func       =
 724                                 nativetable[i].func;
 725                 }
 726                 nativecompdone = true;
 727         }
 728
 729 #ifdef JOWENN_DEBUG
 730         buffer_len =
 731                 utf_strlen(cname) + utf_strlen(mname) + utf_strlen(desc) + 64;
 732
 733         buffer = MNEW(char, buffer_len);
 734
 735         strcpy(buffer, "searching matching function in native table:");
 736         utf_sprint(buffer+strlen(buffer), mname);
 737         strcpy(buffer+strlen(buffer), ": ");
 738         utf_sprint(buffer+strlen(buffer), desc);
 739         strcpy(buffer+strlen(buffer), " for class ");
 740         utf_sprint(buffer+strlen(buffer), cname);
 741
 742         log_text(buffer);
 743
 744         MFREE(buffer, char, buffer_len);
 745 #endif
 746
 747         for (i = 0; i < NATIVETABLESIZE; i++) {
 748                 n = &(nativecomptable[i]);
 749
 750                 if (cname == n->classname && mname == n->methodname &&
 751                     desc == n->descriptor && isstatic == n->isstatic)
 752                         return n->func;
 753 #ifdef JOWENN_DEBUG
 754                         else {
 755                                 if (cname == n->classname && mname == n->methodname )  log_text("static and descriptor mismatch");
 756
 757                                 else {
 758                                         buffer_len =
 759                                           utf_strlen(n->classname) + utf_strlen(n->methodname) + utf_strlen(n->descriptor) + 64;
 760
 761                                         buffer = MNEW(char, buffer_len);
 762
 763                                         strcpy(buffer, "comparing with:");
 764                                         utf_sprint(buffer+strlen(buffer), n->methodname);
 765                                         strcpy (buffer+strlen(buffer), ": ");
 766                                         utf_sprint(buffer+strlen(buffer), n->descriptor);
 767                                         strcpy(buffer+strlen(buffer), " for class ");
 768                                         utf_sprint(buffer+strlen(buffer), n->classname);
 769
 770                                         log_text(buffer);
 771
 772                                         MFREE(buffer, char, buffer_len);
 773                                 }
 774                         }
 775 #endif
 776         }
 777
 778
 779         /* no function was found, display warning */
 780
 781         buffer_len =
 782                 utf_strlen(cname) + utf_strlen(mname) + utf_strlen(desc) + 64;
 783
 784         buffer = MNEW(char, buffer_len);
 785
 786         strcpy(buffer, "warning: native function ");
 787         utf_sprint(buffer + strlen(buffer), mname);
 788         strcpy(buffer + strlen(buffer), ": ");
 789         utf_sprint(buffer + strlen(buffer), desc);
 790         strcpy(buffer + strlen(buffer), " not found in class ");
 791         utf_sprint(buffer + strlen(buffer), cname);
 792
 793         log_text(buffer);
 794
 795         MFREE(buffer, char, buffer_len);
 796
 797 /*      exit(1); */
 798
 799         /* keep compiler happy */
 800         return NULL;
 801 }
 802
 803
 804 /********************** function: javastring_new *******************************
 805
 806         creates a new object of type java/lang/String with the text of
 807         the specified utf8-string
 808
 809         return: pointer to the string or NULL if memory is exhausted.
 810
 811 *******************************************************************************/
 812
 813 java_lang_String *javastring_new(utf *u)
 814 {
 815         char *utf_ptr = u->text;        /* current utf character in utf string    */
 816         int utflength = utf_strlen(u);  /* length of utf-string if uncompressed   */
 817         java_lang_String *s;                /* result-string                          */
 818         java_chararray *a;
 819         s4 i;
 820
 821         s = (java_lang_String *) builtin_new(class_java_lang_String);
 822         a = builtin_newarray_char(utflength);
 823
 824         /* javastring or character-array could not be created */
 825         if (!a || !s)
 826                 return NULL;
 827
 828         /* decompress utf-string */
 829         for (i = 0; i < utflength; i++)
 830                 a->data[i] = utf_nextu2(&utf_ptr);
 831
 832         /* set fields of the javastring-object */
 833         s->value  = a;
 834         s->offset = 0;
 835         s->count  = utflength;
 836
 837         return s;
 838 }
 839
 840
 841 /********************** function: javastring_new_char **************************
 842
 843         creates a new java/lang/String object which contains the convertet
 844         C-string passed via text.
 845
 846         return: the object pointer or NULL if memory is exhausted.
 847
 848 *******************************************************************************/
 849
 850 java_lang_String *javastring_new_char(char *text)
 851 {
 852         s4 i;
 853         s4 len = strlen(text); /* length of the string */
 854         java_lang_String *s;   /* result-string */
 855         java_chararray *a;
 856
 857         s = (java_lang_String *) builtin_new(class_java_lang_String);
 858         a = builtin_newarray_char(len);
 859
 860         /* javastring or character-array could not be created */
 861         if (!a || !s)
 862                 return NULL;
 863
 864         /* copy text */
 865         for (i = 0; i < len; i++)
 866                 a->data[i] = text[i];
 867
 868         /* set fields of the javastring-object */
 869         s->value  = a;
 870         s->offset = 0;
 871         s->count  = len;
 872
 873         return s;
 874 }
 875
 876
 877 /************************* function javastring_tochar **************************
 878
 879         converts a Java string into a C string.
 880
 881         return: pointer to C string
 882
 883         Caution: every call of this function overwrites the previous string !!!
 884
 885 *******************************************************************************/
 886
 887 static char stringbuffer[MAXSTRINGSIZE];
 888
 889 char *javastring_tochar(java_objectheader *so)
 890 {
 891         java_lang_String *s = (java_lang_String *) so;
 892         java_chararray *a;
 893         s4 i;
 894
 895         if (!s)
 896                 return "";
 897
 898         a = s->value;
 899
 900         if (!a)
 901                 return "";
 902
 903         if (s->count > MAXSTRINGSIZE)
 904                 return "";
 905
 906         for (i = 0; i < s->count; i++)
 907                 stringbuffer[i] = a->data[s->offset + i];
 908
 909         stringbuffer[i] = '\0';
 910
 911         return stringbuffer;
 912 }
 913
 914
 915 /****************** function class_findfield_approx ****************************
 916
 917         searches in 'classinfo'-structure for a field with the
 918         specified name
 919
 920 *******************************************************************************/
 921
 922 fieldinfo *class_findfield_approx(classinfo *c, utf *name)
 923 {
 924         s4 i;
 925
 926         for (i = 0; i < c->fieldscount; i++) {
 927                 /* compare field names */
 928                 if ((c->fields[i].name == name))
 929                         return &(c->fields[i]);
 930         }
 931
 932         /* field was not found, raise exception */
 933         *exceptionptr = new_exception(string_java_lang_NoSuchFieldException);
 934
 935         return NULL;
 936 }
 937
 938
 939 s4 class_findfield_index_approx(classinfo *c, utf *name)
 940 {
 941         s4 i;
 942
 943         for (i = 0; i < c->fieldscount; i++) {
 944                 /* compare field names */
 945                 if ((c->fields[i].name == name))
 946                         return i;
 947         }
 948
 949         /* field was not found, raise exception */
 950         *exceptionptr = new_exception(string_java_lang_NoSuchFieldException);
 951
 952         return -1;
 953 }
 954
 955
 956 /********************** function: native_new_and_init *************************
 957
 958         Creates a new object on the heap and calls the initializer.
 959         Returns the object pointer or NULL if memory is exhausted.
 960
 961 *******************************************************************************/
 962
 963 java_objectheader *native_new_and_init(classinfo *c)
 964 {
 965         methodinfo *m;
 966         java_objectheader *o;
 967
 968         if (!c)
 969                 return *exceptionptr;
 970
 971         o = builtin_new(c);                 /* create object                      */
 972
 973         if (!o)
 974                 return NULL;
 975
 976         /* find initializer */
 977
 978         m = class_findmethod(c,
 979                                                  utf_new_char("<init>"),
 980                                                  utf_new_char("()V"));
 981
 982         if (!m) {                           /* initializer not found              */
 983                 if (verbose) {
 984                         char logtext[MAXLOGTEXT];
 985                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 986                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 987                         log_text(logtext);
 988                 }
 989                 return o;
 990         }
 991
 992         /* call initializer */
 993
 994         asm_calljavafunction(m, o, NULL, NULL, NULL);
 995
 996         return o;
 997 }
 998
 999
1000 java_objectheader *native_new_and_init_string(classinfo *c, java_lang_String *s)
1001 {
1002         methodinfo *m;
1003         java_objectheader *o;
1004
1005         if (!c)
1006                 return *exceptionptr;
1007
1008         o = builtin_new(c);          /* create object          */
1009
1010         if (!o)
1011                 return NULL;
1012
1013         /* find initializer */
1014
1015         m = class_findmethod(c,
1016                                                  utf_new_char("<init>"),
1017                                                  utf_new_char("(Ljava/lang/String;)V"));
1018
1019         if (!m) {                                       /* initializer not found  */
1020                 if (verbose) {
1021                         char logtext[MAXLOGTEXT];
1022                         sprintf(logtext, "Warning: class has no instance-initializer: ");
1023                         utf_sprint_classname(logtext + strlen(logtext), c->name);
1024                         log_text(logtext);
1025                 }
1026                 return o;
1027         }
1028
1029         /* call initializer */
1030
1031         asm_calljavafunction(m, o, s, NULL, NULL);
1032
1033         return o;
1034 }
1035
1036
1037 java_objectheader *native_new_and_init_int(classinfo *c, s4 i)
1038 {
1039         methodinfo *m;
1040         java_objectheader *o;
1041
1042         if (!c)
1043                 return *exceptionptr;
1044
1045         o = builtin_new(c);          /* create object          */
1046
1047         if (!o) return NULL;
1048
1049         /* find initializer */
1050
1051         m = class_findmethod(c,
1052                                                  utf_new_char("<init>"),
1053                                                  utf_new_char("(I)V"));
1054
1055         if (!m) {                                       /* initializer not found  */
1056                 if (verbose) {
1057                         char logtext[MAXLOGTEXT];
1058                         sprintf(logtext, "Warning: class has no instance-initializer: ");
1059                         utf_sprint_classname(logtext + strlen(logtext), c->name);
1060                         log_text(logtext);
1061                 }
1062                 return o;
1063         }
1064
1065         /* call initializer */
1066
1067 #if defined(__I386__) || defined(__POWERPC__)
1068         asm_calljavafunction(m, o, (void *) i, NULL, NULL);
1069 #else
1070         asm_calljavafunction(m, o, (void *) (s8) i, NULL, NULL);
1071 #endif
1072
1073         return o;
1074 }
1075
1076
1077 java_objectheader *native_new_and_init_throwable(classinfo *c, java_lang_Throwable *t)
1078 {
1079         methodinfo *m;
1080         java_objectheader *o;
1081
1082         if (!c)
1083                 return *exceptionptr;
1084
1085         o = builtin_new(c);          /* create object          */
1086
1087         if (!o) return NULL;
1088
1089         /* find initializer */
1090
1091         m = class_findmethod(c,
1092                                                  utf_new_char("<init>"),
1093                                                  utf_new_char("(Ljava/lang/Throwable;)V"));
1094
1095         if (!m) {                                       /* initializer not found  */
1096                 if (verbose) {
1097                         char logtext[MAXLOGTEXT];
1098                         sprintf(logtext, "Warning: class has no instance-initializer: ");
1099                         utf_sprint_classname(logtext + strlen(logtext), c->name);
1100                         log_text(logtext);
1101                 }
1102                 return o;
1103         }
1104
1105         /* call initializer */
1106
1107         asm_calljavafunction(m, o, t, NULL, NULL);
1108
1109         return o;
1110 }
1111
1112
1113 /******************** function: stringtable_update ****************************
1114
1115         traverses the javastring hashtable and sets the vftbl-entries of
1116         javastrings which were temporarily set to NULL, because
1117         java.lang.Object was not yet loaded
1118
1119 *******************************************************************************/
1120
1121 void stringtable_update ()
1122 {
1123         java_lang_String *js;
1124         java_chararray *a;
1125         literalstring *s;       /* hashtable entry */
1126         int i;
1127
1128         for (i = 0; i < string_hash.size; i++) {
1129                 s = string_hash.ptr[i];
1130                 if (s) {
1131                         while (s) {
1132
1133                                 js = (java_lang_String *) s->string;
1134
1135                                 if (!js || !js->value)
1136                                         /* error in hashtable found */
1137                                         panic("invalid literalstring in hashtable");
1138
1139                                 a = js->value;
1140
1141                                 if (!js->header.vftbl)
1142                                         /* vftbl of javastring is NULL */
1143                                         js->header.vftbl = class_java_lang_String->vftbl;
1144
1145                                 if (!a->header.objheader.vftbl)
1146                                         /* vftbl of character-array is NULL */
1147                                         a->header.objheader.vftbl = primitivetype_table[ARRAYTYPE_CHAR].arrayvftbl;
1148
1149                                 /* follow link in external hash chain */
1150                                 s = s->hashlink;
1151                         }
1152                 }
1153         }
1154 }
1155
1156
1157 /************************* function: u2_utflength ***************************
1158
1159         returns the utf length in bytes of a u2 array
1160
1161 *****************************************************************************/
1162
1163 u4 u2_utflength(u2 *text, u4 u2_length)
1164 {
1165         u4 result_len =  0;  /* utf length in bytes  */
1166         u2 ch;               /* current unicode character */
1167         u4 len;
1168
1169         for (len = 0; len < u2_length; len++) {
1170                 /* next unicode character */
1171                 ch = *text++;
1172
1173                 /* determine bytes required to store unicode character as utf */
1174                 if (ch && (ch < 0x80))
1175                         result_len++;
1176                 else if (ch < 0x800)
1177                         result_len += 2;
1178                 else
1179                         result_len += 3;
1180         }
1181
1182     return result_len;
1183 }
1184
1185
1186 /********************* function: utf_new_u2 ***********************************
1187
1188         make utf symbol from u2 array,
1189         if isclassname is true '.' is replaced by '/'
1190
1191 *******************************************************************************/
1192
1193 utf *utf_new_u2(u2 *unicode_pos, u4 unicode_length, bool isclassname)
1194 {
1195         char *buffer; /* memory buffer for  unicode characters */
1196         char *pos;    /* pointer to current position in buffer */
1197         u4 left;      /* unicode characters left */
1198         u4 buflength; /* utf length in bytes of the u2 array  */
1199         utf *result;  /* resulting utf-string */
1200         int i;
1201
1202         /* determine utf length in bytes and allocate memory */
1203         /* printf("utf_new_u2: unicode_length=%d\n",unicode_length);            */
1204         buflength = u2_utflength(unicode_pos, unicode_length);
1205         buffer    = MNEW(char, buflength);
1206
1207         /* memory allocation failed */
1208         if (!buffer) {
1209                 printf("length: %d\n",buflength);
1210                 log_text("utf_new_u2:buffer==NULL");
1211         }
1212
1213         left = buflength;
1214         pos  = buffer;
1215
1216         for (i = 0; i++ < unicode_length; unicode_pos++) {
1217                 /* next unicode character */
1218                 u2 c = *unicode_pos;
1219
1220                 if ((c != 0) && (c < 0x80)) {
1221                         /* 1 character */
1222                         left--;
1223                 if ((int) left < 0) break;
1224                         /* convert classname */
1225                         if (isclassname && c == '.')
1226                                 *pos++ = '/';
1227                         else
1228                                 *pos++ = (char) c;
1229
1230                 } else if (c < 0x800) {
1231                         /* 2 characters */
1232                 unsigned char high = c >> 6;
1233                 unsigned char low  = c & 0x3F;
1234                         left = left - 2;
1235                 if ((int) left < 0) break;
1236                 *pos++ = high | 0xC0;
1237                 *pos++ = low  | 0x80;
1238
1239                 } else {
1240                 /* 3 characters */
1241                 char low  = c & 0x3f;
1242                 char mid  = (c >> 6) & 0x3F;
1243                 char high = c >> 12;
1244                         left = left - 3;
1245                 if ((int) left < 0) break;
1246                 *pos++ = high | 0xE0;
1247                 *pos++ = mid  | 0x80;
1248                 *pos++ = low  | 0x80;
1249                 }
1250         }
1251
1252         /* insert utf-string into symbol-table */
1253         result = utf_new(buffer,buflength);
1254
1255         MFREE(buffer, char, buflength);
1256
1257         return result;
1258 }
1259
1260
1261 /********************* function: javastring_toutf *****************************
1262
1263         make utf symbol from javastring
1264
1265 *******************************************************************************/
1266
1267 utf *javastring_toutf(java_lang_String *string, bool isclassname)
1268 {
1269         java_lang_String *str = (java_lang_String *) string;
1270
1271 /*      printf("javastring_toutf offset: %d, len %d\n",str->offset, str->count); */
1272 /*      fflush(stdout); */
1273
1274         return utf_new_u2(str->value->data + str->offset, str->count, isclassname);
1275 }
1276
1277
1278 /********************* function: literalstring_u2 *****************************
1279
1280     searches for the javastring with the specified u2-array in
1281     the string hashtable, if there is no such string a new one is
1282     created
1283
1284     if copymode is true a copy of the u2-array is made
1285
1286 *******************************************************************************/
1287
1288 java_objectheader *literalstring_u2(java_chararray *a, u4 length, u4 offset,
1289                                                                         bool copymode)
1290 {
1291     literalstring *s;                /* hashtable element */
1292     java_lang_String *js;            /* u2-array wrapped in javastring */
1293     java_chararray *stringdata;      /* copy of u2-array */
1294     u4 key;
1295     u4 slot;
1296     u2 i;
1297
1298 //#define DEBUG_LITERALSTRING_U2
1299 #ifdef DEBUG_LITERALSTRING_U2
1300     printf("literalstring_u2: length=%d, offset=%d\n", length, offset);
1301         fflush(stdout);
1302 #endif
1303
1304     /* find location in hashtable */
1305     key  = unicode_hashkey(a->data + offset, length);
1306     slot = key & (string_hash.size - 1);
1307     s    = string_hash.ptr[slot];
1308
1309     while (s) {
1310                 js = (java_lang_String *) s->string;
1311
1312                 if (length == js->count) {
1313                         /* compare text */
1314                         for (i = 0; i < length; i++) {
1315                                 if (a->data[offset + i] != js->value->data[i])
1316                                         goto nomatch;
1317                         }
1318
1319                         /* string already in hashtable, free memory */
1320                         if (!copymode)
1321                                 lit_mem_free(a, sizeof(java_chararray) + sizeof(u2) * (length - 1) + 10);
1322
1323 #ifdef DEBUG_LITERALSTRING_U2
1324                         printf("literalstring_u2: foundentry at %p\n", js);
1325                         utf_display(javastring_toutf(js, 0));
1326                         printf("\n\n");
1327                         fflush(stdout);
1328 #endif
1329                         return (java_objectheader *) js;
1330                 }
1331
1332         nomatch:
1333                 /* follow link in external hash chain */
1334                 s = s->hashlink;
1335     }
1336
1337     if (copymode) {
1338                 /* create copy of u2-array for new javastring */
1339                 u4 arraysize = sizeof(java_chararray) + sizeof(u2) * (length - 1) + 10;
1340                 stringdata = lit_mem_alloc(arraysize);
1341 /*              memcpy(stringdata, a, arraysize); */
1342                 memcpy(&(stringdata->header), &(a->header), sizeof(java_arrayheader));
1343                 memcpy(&(stringdata->data), &(a->data) + offset, sizeof(u2) * (length - 1) + 10);
1344
1345     } else {
1346                 stringdata = a;
1347         }
1348
1349     /* location in hashtable found, complete arrayheader */
1350     stringdata->header.objheader.vftbl = primitivetype_table[ARRAYTYPE_CHAR].arrayvftbl;
1351     stringdata->header.size = length;
1352
1353     /* create new javastring */
1354     js = LNEW(java_lang_String);
1355         /* TWISTI */
1356 /*      js->header.vftbl = class_java_lang_String->vftbl; */
1357     js->header.vftbl = class_load(class_new(utf_new_char("java/lang/String")))->vftbl;
1358     js->value  = stringdata;
1359     js->offset = 0;
1360     js->count  = length;
1361
1362     /* create new literalstring */
1363     s = NEW(literalstring);
1364     s->hashlink = string_hash.ptr[slot];
1365     s->string   = (java_objectheader *) js;
1366     string_hash.ptr[slot] = s;
1367
1368     /* update numbe of hashtable entries */
1369     string_hash.entries++;
1370
1371     /* reorganization of hashtable */
1372     if (string_hash.entries > (string_hash.size * 2)) {
1373                 /* reorganization of hashtable, average length of
1374          the external chains is approx. 2                */
1375
1376                 u4 i;
1377                 literalstring *s;
1378                 hashtable newhash; /* the new hashtable */
1379
1380                 /* create new hashtable, double the size */
1381                 init_hashtable(&newhash, string_hash.size * 2);
1382                 newhash.entries = string_hash.entries;
1383
1384                 /* transfer elements to new hashtable */
1385                 for (i = 0; i < string_hash.size; i++) {
1386                         s = string_hash.ptr[i];
1387                         while (s) {
1388                                 literalstring *nexts = s->hashlink;
1389                                 js   = (java_lang_String *) s->string;
1390                                 slot = unicode_hashkey(js->value->data, js->count) & (newhash.size - 1);
1391
1392                                 s->hashlink = newhash.ptr[slot];
1393                                 newhash.ptr[slot] = s;
1394
1395                                 /* follow link in external hash chain */
1396                                 s = nexts;
1397                         }
1398                 }
1399
1400                 /* dispose old table */
1401                 MFREE(string_hash.ptr, void*, string_hash.size);
1402                 string_hash = newhash;
1403     }
1404
1405 #ifdef DEBUG_LITERALSTRING_U2
1406         printf("literalstring_u2: newly created at %p\n", js);
1407         utf_display(javastring_toutf(js, 0));
1408         printf("\n\n");
1409         fflush(stdout);
1410 #endif
1411
1412     return (java_objectheader *) js;
1413 }
1414
1415
1416 /******************** Function: literalstring_new *****************************
1417
1418     creates a new javastring with the text of the utf-symbol
1419     and inserts it into the string hashtable
1420
1421 *******************************************************************************/
1422
1423 java_objectheader *literalstring_new(utf *u)
1424 {
1425     char *utf_ptr = u->text;         /* pointer to current unicode character in utf string */
1426     u4 utflength  = utf_strlen(u);   /* length of utf-string if uncompressed */
1427     java_chararray *a;               /* u2-array constructed from utf string */
1428     u4 i;
1429
1430     /* allocate memory */
1431     a = lit_mem_alloc(sizeof(java_chararray) + sizeof(u2) * (utflength - 1) + 10);
1432
1433     /* convert utf-string to u2-array */
1434     for (i = 0; i < utflength; i++)
1435                 a->data[i] = utf_nextu2(&utf_ptr);
1436
1437     return literalstring_u2(a, utflength, 0, false);
1438 }
1439
1440
1441 /********************** function: literalstring_free **************************
1442
1443         removes a javastring from memory
1444
1445 ******************************************************************************/
1446
1447 void literalstring_free(java_objectheader* sobj)
1448 {
1449         java_lang_String *s = (java_lang_String *) sobj;
1450         java_chararray *a = s->value;
1451
1452         /* dispose memory of java.lang.String object */
1453         LFREE(s, java_lang_String);
1454
1455         /* dispose memory of java-characterarray */
1456         LFREE(a, sizeof(java_chararray) + sizeof(u2) * (a->header.size - 1)); /* +10 ?? */
1457 }
1458
1459
1460 void copy_vftbl(vftbl **dest, vftbl *src)
1461 {
1462     *dest = src;
1463 #if 0
1464     /* XXX this kind of copying does not work (in the general
1465      * case). The interface tables would have to be copied, too. I
1466      * don't see why we should make a copy anyway. -Edwin
1467      */
1468         *dest = mem_alloc(sizeof(vftbl) + sizeof(methodptr)*(src->vftbllength-1));
1469         memcpy(*dest, src, sizeof(vftbl) - sizeof(methodptr));
1470         memcpy(&(*dest)->table, &src->table, src->vftbllength * sizeof(methodptr));
1471 #endif
1472 }
1473
1474
1475 /******************************************************************************************
1476
1477         creates method signature (excluding return type) from array of
1478         class-objects representing the parameters of the method
1479
1480 *******************************************************************************************/
1481
1482
1483 utf *create_methodsig(java_objectarray* types, char *retType)
1484 {
1485     char *buffer;       /* buffer for building the desciptor */
1486     char *pos;          /* current position in buffer */
1487     utf *result;        /* the method signature */
1488     u4 buffer_size = 3; /* minimal size=3: room for parenthesis and returntype */
1489     u4 i, j;
1490
1491     if (!types) return NULL;
1492
1493     /* determine required buffer-size */
1494     for (i = 0; i < types->header.size; i++) {
1495                 classinfo *c = (classinfo *) types->data[i];
1496                 buffer_size  = buffer_size + c->name->blength + 2;
1497     }
1498
1499     if (retType) buffer_size += strlen(retType);
1500
1501     /* allocate buffer */
1502     buffer = MNEW(u1, buffer_size);
1503     pos    = buffer;
1504
1505     /* method-desciptor starts with parenthesis */
1506     *pos++ = '(';
1507
1508     for (i = 0; i < types->header.size; i++) {
1509                 char ch;
1510
1511                 /* current argument */
1512             classinfo *c = (classinfo *) types->data[i];
1513
1514             /* current position in utf-text */
1515             char *utf_ptr = c->name->text;
1516
1517             /* determine type of argument */
1518             if ((ch = utf_nextu2(&utf_ptr)) == '[') {
1519                 /* arrayclass */
1520                 for (utf_ptr--; utf_ptr < utf_end(c->name); utf_ptr++) {
1521                                 *pos++ = *utf_ptr; /* copy text */
1522                         }
1523
1524             } else {
1525                         /* check for primitive types */
1526                         for (j = 0; j < PRIMITIVETYPE_COUNT; j++) {
1527                                 char *utf_pos   = utf_ptr - 1;
1528                                 char *primitive = primitivetype_table[j].wrapname;
1529
1530                                 /* compare text */
1531                                 while (utf_pos < utf_end(c->name)) {
1532                                         if (*utf_pos++ != *primitive++) goto nomatch;
1533                                 }
1534
1535                                 /* primitive type found */
1536                                 *pos++ = primitivetype_table[j].typesig;
1537                                 goto next_type;
1538
1539                         nomatch:
1540                                 ;
1541                         }
1542
1543                         /* no primitive type and no arrayclass, so must be object */
1544                         *pos++ = 'L';
1545
1546                         /* copy text */
1547                         for (utf_ptr--; utf_ptr < utf_end(c->name); utf_ptr++) {
1548                                 *pos++ = *utf_ptr;
1549                         }
1550
1551                         *pos++ = ';';
1552
1553                 next_type:
1554                         ;
1555                 }
1556     }
1557
1558     *pos++ = ')';
1559
1560     if (retType) {
1561                 for (i = 0; i < strlen(retType); i++) {
1562                         *pos++ = retType[i];
1563                 }
1564     }
1565
1566     /* create utf-string */
1567     result = utf_new(buffer, (pos - buffer));
1568     MFREE(buffer, u1, buffer_size);
1569
1570     return result;
1571 }
1572
1573
1574 /******************************************************************************************
1575
1576         retrieve the next argument or returntype from a descriptor
1577         and return the corresponding class
1578
1579 *******************************************************************************************/
1580
1581 classinfo *get_type(char **utf_ptr,char *desc_end, bool skip)
1582 {
1583     classinfo *c = class_from_descriptor(*utf_ptr,desc_end,utf_ptr,
1584                                          (skip) ? CLASSLOAD_SKIP : CLASSLOAD_LOAD);
1585     if (!c)
1586         /* unknown type */
1587         panic("illegal descriptor");
1588
1589     if (skip) return NULL;
1590
1591     use_class_as_object(c);
1592     return c;
1593 }
1594
1595
1596 /******************************************************************************************
1597
1598         use the descriptor of a method to generate a java/lang/Class array
1599         which contains the classes of the parametertypes of the method
1600
1601 *******************************************************************************************/
1602
1603 java_objectarray* get_parametertypes(methodinfo *m)
1604 {
1605     utf  *descr    =  m->descriptor;    /* method-descriptor */
1606     char *utf_ptr  =  descr->text;      /* current position in utf-text */
1607     char *desc_end =  utf_end(descr);   /* points behind utf string     */
1608     java_objectarray* result;
1609     int parametercount = 0;
1610     int i;
1611
1612     /* skip '(' */
1613     utf_nextu2(&utf_ptr);
1614
1615     /* determine number of parameters */
1616     while ( *utf_ptr != ')' ) {
1617         get_type(&utf_ptr,desc_end,true);
1618         parametercount++;
1619     }
1620
1621     /* create class-array */
1622     result = builtin_anewarray(parametercount, class_java_lang_Class);
1623
1624     utf_ptr  =  descr->text;
1625     utf_nextu2(&utf_ptr);
1626
1627     /* get returntype classes */
1628     for (i = 0; i < parametercount; i++)
1629             result->data[i] = (java_objectheader *) get_type(&utf_ptr,desc_end, false);
1630
1631     return result;
1632 }
1633
1634
1635
1636
1637
1638 /******************************************************************************************
1639
1640         get the exceptions which can be thrown by a method
1641
1642 *******************************************************************************************/
1643
1644 java_objectarray* get_exceptiontypes(methodinfo *m) {
1645     u2 exccount=m->thrownexceptionscount;
1646     u2 i;
1647     java_objectarray *result;
1648     /* create class-array */
1649     result = builtin_anewarray(exccount, class_java_lang_Class);
1650     for (i=0;i<exccount;i++) {
1651         java_objectheader *oh=(java_objectheader*)(m->thrownexceptions[i]);
1652         use_class_as_object(oh);
1653         result->data[i]=oh;
1654     }
1655     return result;
1656 }
1657
1658
1659
1660
1661
1662 /******************************************************************************************
1663
1664         get the returntype class of a method
1665
1666 *******************************************************************************************/
1667
1668 classinfo *get_returntype(methodinfo *m)
1669 {
1670         char *utf_ptr;   /* current position in utf-text */
1671         char *desc_end;  /* points behind utf string     */
1672         utf *desc = m->descriptor; /* method-descriptor  */
1673
1674         utf_ptr  = desc->text;
1675         desc_end = utf_end(desc);
1676
1677         /* ignore parametertypes */
1678         while ((utf_ptr<desc_end) && utf_nextu2(&utf_ptr)!=')')
1679                 /* skip */ ;
1680
1681         return get_type(&utf_ptr,desc_end, false);
1682 }
1683
1684
1685 /*****************************************************************************/
1686 /*****************************************************************************/
1687
1688
1689 /*--------------------------------------------------------*/
1690 void printNativeCall(nativeCall nc) {
1691   int i,j;
1692
1693   printf("\n%s's Native Methods call:\n",nc.classname); fflush(stdout);
1694   for (i=0; i<nc.methCnt; i++) {
1695       printf("\tMethod=%s %s\n",nc.methods[i].methodname, nc.methods[i].descriptor);fflush(stdout);
1696
1697     for (j=0; j<nc.callCnt[i]; j++) {
1698         printf("\t\t<%i,%i>aCalled = %s %s %s\n",i,j,
1699         nc.methods[i].methodCalls[j].classname,
1700         nc.methods[i].methodCalls[j].methodname,
1701         nc.methods[i].methodCalls[j].descriptor);fflush(stdout);
1702       }
1703     }
1704   printf("-+++++--------------------\n");fflush(stdout);
1705 }
1706
1707 /*--------------------------------------------------------*/
1708 void printCompNativeCall(nativeCompCall nc) {
1709   int i,j;
1710   printf("printCompNativeCall BEGIN\n");fflush(stdout);
1711   printf("\n%s's Native Comp Methods call:\n",nc.classname->text);fflush(stdout);
1712   utf_display(nc.classname); fflush(stdout);
1713
1714   for (i=0; i<nc.methCnt; i++) {
1715     printf("\tMethod=%s %s\n",nc.methods[i].methodname->text,nc.methods[i].descriptor->text);fflush(stdout);
1716     utf_display(nc.methods[i].methodname); fflush(stdout);
1717     utf_display(nc.methods[i].descriptor);fflush(stdout);
1718     printf("\n");fflush(stdout);
1719
1720     for (j=0; j<nc.callCnt[i]; j++) {
1721       printf("\t\t<%i,%i>bCalled = ",i,j);fflush(stdout);
1722         utf_display(nc.methods[i].methodCalls[j].classname);fflush(stdout);
1723         utf_display(nc.methods[i].methodCalls[j].methodname); fflush(stdout);
1724         utf_display(nc.methods[i].methodCalls[j].descriptor);fflush(stdout);
1725         printf("\n");fflush(stdout);
1726       }
1727     }
1728 printf("---------------------\n");fflush(stdout);
1729 }
1730
1731
1732 /*--------------------------------------------------------*/
1733 classMeth findNativeMethodCalls(utf *c, utf *m, utf *d )
1734 {
1735     int i = 0;
1736     int j = 0;
1737     int cnt = 0;
1738     classMeth mc;
1739     mc.i_class = i;
1740     mc.j_method = j;
1741     mc.methCnt = cnt;
1742
1743     return mc;
1744 }
1745
1746 /*--------------------------------------------------------*/
1747 nativeCall* findNativeClassCalls(char *aclassname ) {
1748 int i;
1749
1750 for (i=0;i<NATIVECALLSSIZE; i++) {
1751    /* convert table to utf later to speed up search */
1752    if (strcmp(nativeCalls[i].classname, aclassname) == 0)
1753         return &nativeCalls[i];
1754    }
1755
1756 return NULL;
1757 }
1758 /*--------------------------------------------------------*/
1759 /*--------------------------------------------------------*/
1760 void utfNativeCall(nativeCall nc, nativeCompCall *ncc) {
1761   int i,j;
1762
1763
1764   ncc->classname = utf_new_char(nc.classname);
1765   ncc->methCnt = nc.methCnt;
1766
1767   for (i=0; i<nc.methCnt; i++) {
1768     ncc->methods[i].methodname = utf_new_char(nc.methods[i].methodname);
1769     ncc->methods[i].descriptor = utf_new_char(nc.methods[i].descriptor);
1770     ncc->callCnt[i] = nc.callCnt[i];
1771
1772     for (j=0; j<nc.callCnt[i]; j++) {
1773
1774         ncc->methods[i].methodCalls[j].classname  = utf_new_char(nc.methods[i].methodCalls[j].classname);
1775
1776         if (strcmp("", nc.methods[i].methodCalls[j].methodname) != 0) {
1777           ncc->methods[i].methodCalls[j].methodname = utf_new_char(nc.methods[i].methodCalls[j].methodname);
1778           ncc->methods[i].methodCalls[j].descriptor = utf_new_char(nc.methods[i].methodCalls[j].descriptor);
1779           }
1780         else {
1781           ncc->methods[i].methodCalls[j].methodname = NULL;
1782           ncc->methods[i].methodCalls[j].descriptor = NULL;
1783           }
1784       }
1785     }
1786 }
1787
1788
1789
1790 /*--------------------------------------------------------*/
1791
1792 bool natcall2utf(bool natcallcompdone) {
1793 int i;
1794
1795 if (natcallcompdone)
1796         return true;
1797
1798 for (i=0;i<NATIVECALLSSIZE; i++) {
1799    utfNativeCall  (nativeCalls[i], &nativeCompCalls[i]);
1800    }
1801
1802 return true;
1803 }
1804
1805 /*--------------------------------------------------------*/
1806
1807
1808 java_objectarray *builtin_asm_createclasscontextarray(classinfo **end,classinfo **start)
1809 {
1810 #if defined(__GNUC__)
1811 #warning platform dependend
1812 #endif
1813         java_objectarray *tmpArray;
1814         int i;
1815         classinfo **current;
1816         classinfo *c;
1817         size_t size=(((size_t)start)-((size_t)end)) / sizeof (classinfo*);
1818 /*      printf("end %p, start %p, size %ld\n",end,start,size);*/
1819         if (!class_java_lang_Class)
1820                 class_java_lang_Class = class_new(utf_new_char ("java/lang/Class"));
1821         if (!class_java_lang_SecurityManager)
1822                 class_java_lang_SecurityManager = class_new(utf_new_char ("java/lang/SecurityManager"));
1823         if (size>0) {
1824                 if (start==class_java_lang_SecurityManager) {
1825                         size--;
1826                         start--;
1827                 }
1828         }
1829         tmpArray=builtin_newarray(size, class_array_of(class_java_lang_Class)->vftbl);
1830
1831         for(i=0,current=start;i<size;i++,current--) {
1832                 c=*current;
1833 /*              printf("%d\n",i);
1834                 utf_display(c->name);*/
1835                 use_class_as_object(c);
1836                 tmpArray->data[i]=c;
1837         }
1838         return tmpArray;
1839
1840 }
1841
1842 java_lang_ClassLoader *builtin_asm_getclassloader(classinfo **end,classinfo **start)
1843 {
1844 #if defined(__GNUC__)
1845 #warning platform dependend
1846 #endif
1847         int i;
1848         classinfo **current;
1849         classinfo *c;
1850         classinfo *privilegedAction;
1851         size_t size=(((size_t)start)-((size_t)end)) / sizeof (classinfo*);
1852 /*      log_text("builtin_asm_getclassloader");
1853         printf("end %p, start %p, size %ld\n",end,start,size);*/
1854
1855         if (!class_java_lang_SecurityManager)
1856                 class_java_lang_SecurityManager = class_new(utf_new_char ("java/lang/SecurityManager"));
1857         if (size>0) {
1858                 if (start==class_java_lang_SecurityManager) {
1859                         size--;
1860                         start--;
1861                 }
1862         }
1863
1864         privilegedAction=class_new(utf_new_char("java/security/PrivilegedAction"));
1865
1866         for(i=0,current=start;i<size;i++,current--) {
1867                 c=*current;
1868                 if (c==privilegedAction) return NULL;
1869                 if (c->classloader) return c->classloader;
1870         }
1871         return NULL;
1872
1873
1874
1875
1876 /*
1877         log_text("Java_java_lang_VMSecurityManager_currentClassLoader");
1878         init_systemclassloader();
1879
1880         return SystemClassLoader;*/
1881 }
1882
1883 /*
1884  * These are local overrides for various environment variables in Emacs.
1885  * Please do not remove this and leave it at the end of the file, where
1886  * Emacs will automagically detect them.
1887  * ---------------------------------------------------------------------
1888  * Local variables:
1889  * mode: c
1890  * indent-tabs-mode: t
1891  * c-basic-offset: 4
1892  * tab-width: 4
1893  * End:
1894  */