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 1444 2004-11-05 13:54:52Z 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 "exceptions.h"
  50 #include "global.h"
  51 #include "options.h"
  52 #include "jni.h"
  53 #include "native.h"
  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 /* include table of native functions */
  81
  82 #include "nativetable.inc"
  83
  84
  85 /* for java-string to char conversion */
  86 #define MAXSTRINGSIZE 1000
  87
  88
  89 /******************** systemclasses required for native methods ***************/
  90
  91 classinfo *class_java_lang_Class;
  92 classinfo *class_java_lang_VMClass;
  93 classinfo *class_java_lang_System;
  94 classinfo *class_java_lang_ClassLoader;
  95 classinfo *class_gnu_java_lang_SystemClassLoader;
  96 classinfo *class_java_lang_SecurityManager;
  97 classinfo *class_java_lang_Double;
  98 classinfo *class_java_lang_Float;
  99 classinfo *class_java_lang_Long;
 100 classinfo *class_java_lang_Byte;
 101 classinfo *class_java_lang_Short;
 102 classinfo *class_java_lang_Boolean;
 103 classinfo *class_java_lang_Void;
 104 classinfo *class_java_lang_Character;
 105 classinfo *class_java_lang_Integer;
 106
 107 methodinfo *method_vmclass_init;
 108
 109
 110 /* the system classloader object */
 111 struct java_lang_ClassLoader *SystemClassLoader = NULL;
 112
 113 /* for raising exceptions from native methods */
 114 #if !defined(USE_THREADS) || !defined(NATIVE_THREADS)
 115 java_objectheader* _exceptionptr = NULL;
 116 #endif
 117
 118 /************* use classinfo structure as java.lang.Class object **************/
 119
 120 void use_class_as_object(classinfo *c)
 121 {
 122         if (!c->classvftbl) {
 123                 c->header.vftbl = class_java_lang_Class->vftbl;
 124                 c->classvftbl = true;
 125         }
 126
 127 }
 128
 129
 130 /*************************** include native methods ***************************/
 131
 132 #ifdef USE_GTK
 133 #include "nat/GdkGraphics.c"
 134 #include "nat/GtkComponentPeer.c"
 135 #include "nat/GdkPixbufDecoder.c"
 136 #include "nat/GtkScrollPanePeer.c"
 137 #include "nat/GtkFileDialogPeer.c"
 138 #endif
 139
 140
 141 /************************** tables for methods ********************************/
 142
 143 #undef JOWENN_DEBUG
 144 #undef JOWENN_DEBUG1
 145
 146 #ifdef STATIC_CLASSPATH
 147 #define NATIVETABLESIZE  (sizeof(nativetable)/sizeof(struct nativeref))
 148
 149 /* table for fast string comparison */
 150 static nativecompref nativecomptable[NATIVETABLESIZE];
 151
 152 /* string comparsion table initialized */
 153 static bool nativecompdone = false;
 154 #endif
 155
 156 /******************************************************************************/
 157
 158 #include "natcalls.h"
 159
 160
 161 /*********************** function: native_loadclasses **************************
 162
 163         load classes required for native methods
 164
 165 *******************************************************************************/
 166
 167 void native_loadclasses()
 168 {
 169         static int classesLoaded = 0; /*temporary hack JoWenn*/
 170
 171         if (classesLoaded)
 172                 return;
 173
 174         classesLoaded = 1;
 175
 176         class_java_lang_Cloneable =
 177                 class_new(utf_new_char("java/lang/Cloneable"));
 178         class_load(class_java_lang_Cloneable);
 179         class_link(class_java_lang_Cloneable);
 180
 181         class_java_lang_Class =
 182                 class_new(utf_new_char("java/lang/Class"));
 183         class_load(class_java_lang_Class);
 184         class_link(class_java_lang_Class);
 185
 186         class_java_lang_VMClass =
 187                 class_new(utf_new_char("java/lang/VMClass"));
 188         class_load(class_java_lang_VMClass);
 189         class_link(class_java_lang_VMClass);
 190
 191         class_java_lang_ClassLoader =
 192                 class_new(utf_new_char("java/lang/ClassLoader"));
 193         class_load(class_java_lang_ClassLoader);
 194         class_link(class_java_lang_ClassLoader);
 195
 196         /* load classes for wrapping primitive types */
 197         class_java_lang_Double = class_new(utf_new_char("java/lang/Double"));
 198         class_load(class_java_lang_Double);
 199         class_link(class_java_lang_Double);
 200
 201         class_java_lang_Float = class_new(utf_new_char("java/lang/Float"));
 202         class_load(class_java_lang_Float);
 203         class_link(class_java_lang_Float);
 204
 205         class_java_lang_Character =     class_new(utf_new_char("java/lang/Character"));
 206         class_load(class_java_lang_Character);
 207         class_link(class_java_lang_Character);
 208
 209         class_java_lang_Integer = class_new(utf_new_char("java/lang/Integer"));
 210         class_load(class_java_lang_Integer);
 211         class_link(class_java_lang_Integer);
 212
 213         class_java_lang_Long = class_new(utf_new_char("java/lang/Long"));
 214         class_load(class_java_lang_Long);
 215         class_link(class_java_lang_Long);
 216
 217         class_java_lang_Byte = class_new(utf_new_char("java/lang/Byte"));
 218         class_load(class_java_lang_Byte);
 219         class_link(class_java_lang_Byte);
 220
 221         class_java_lang_Short = class_new(utf_new_char("java/lang/Short"));
 222         class_load(class_java_lang_Short);
 223         class_link(class_java_lang_Short);
 224
 225         class_java_lang_Boolean = class_new(utf_new_char("java/lang/Boolean"));
 226         class_load(class_java_lang_Boolean);
 227         class_link(class_java_lang_Boolean);
 228
 229         class_java_lang_Void = class_new(utf_new_char("java/lang/Void"));
 230         class_load(class_java_lang_Void);
 231         class_link(class_java_lang_Void);
 232
 233 }
 234
 235
 236 /*****************************************************************************
 237
 238         create systemclassloader object and initialize instance fields
 239
 240 ******************************************************************************/
 241
 242 void init_systemclassloader()
 243 {
 244         log_text("init_systemclassloader");
 245         if (!SystemClassLoader) {
 246                 native_loadclasses();
 247                 log_text("Initializing new system class loader");
 248                 /* create object and call initializer */
 249                 SystemClassLoader = (java_lang_ClassLoader *) native_new_and_init(class_new(utf_new_char("gnu/java/lang/SystemClassLoader")));
 250
 251                 /* systemclassloader has no parent */
 252                 SystemClassLoader->parent      = NULL;
 253                 SystemClassLoader->initialized = true;
 254         }
 255         log_text("leaving system class loader");
 256 }
 257
 258
 259 /*********************** Function: native_findfunction *************************
 260
 261         Looks up a method (must have the same class name, method name, descriptor
 262         and 'static'ness) and returns a function pointer to it.
 263         Returns: function pointer or NULL (if there is no such method)
 264
 265         Remark: For faster operation, the names/descriptors are converted from C
 266                 strings to Unicode the first time this function is called.
 267
 268 *******************************************************************************/
 269
 270 functionptr native_findfunction(utf *cname, utf *mname,
 271                                                                 utf *desc, bool isstatic)
 272 {
 273 #ifdef STATIC_CLASSPATH
 274         int i;
 275         /* entry of table for fast string comparison */
 276         struct nativecompref *n;
 277         /* for warning message if no function is found */
 278         char *buffer;
 279         int buffer_len;
 280
 281         isstatic = isstatic ? true : false;
 282
 283         if (!nativecompdone) {
 284                 for (i = 0; i < NATIVETABLESIZE; i++) {
 285                         nativecomptable[i].classname  =
 286                                 utf_new_char(nativetable[i].classname);
 287                         nativecomptable[i].methodname =
 288                                 utf_new_char(nativetable[i].methodname);
 289                         nativecomptable[i].descriptor =
 290                                 utf_new_char(nativetable[i].descriptor);
 291                         nativecomptable[i].isstatic   =
 292                                 nativetable[i].isstatic;
 293                         nativecomptable[i].func       =
 294                                 nativetable[i].func;
 295                 }
 296                 nativecompdone = true;
 297         }
 298
 299 #ifdef JOWENN_DEBUG
 300         buffer_len =
 301                 utf_strlen(cname) + utf_strlen(mname) + utf_strlen(desc) + 64;
 302
 303         buffer = MNEW(char, buffer_len);
 304
 305         strcpy(buffer, "searching matching function in native table:");
 306         utf_sprint(buffer+strlen(buffer), mname);
 307         strcpy(buffer+strlen(buffer), ": ");
 308         utf_sprint(buffer+strlen(buffer), desc);
 309         strcpy(buffer+strlen(buffer), " for class ");
 310         utf_sprint(buffer+strlen(buffer), cname);
 311
 312         log_text(buffer);
 313
 314         MFREE(buffer, char, buffer_len);
 315 #endif
 316
 317         for (i = 0; i < NATIVETABLESIZE; i++) {
 318                 n = &(nativecomptable[i]);
 319
 320                 if (cname == n->classname && mname == n->methodname &&
 321                     desc == n->descriptor && isstatic == n->isstatic)
 322                         return n->func;
 323 #ifdef JOWENN_DEBUG
 324                         else {
 325                                 if (cname == n->classname && mname == n->methodname )  log_text("static and descriptor mismatch");
 326
 327                                 else {
 328                                         buffer_len =
 329                                           utf_strlen(n->classname) + utf_strlen(n->methodname) + utf_strlen(n->descriptor) + 64;
 330
 331                                         buffer = MNEW(char, buffer_len);
 332
 333                                         strcpy(buffer, "comparing with:");
 334                                         utf_sprint(buffer+strlen(buffer), n->methodname);
 335                                         strcpy (buffer+strlen(buffer), ": ");
 336                                         utf_sprint(buffer+strlen(buffer), n->descriptor);
 337                                         strcpy(buffer+strlen(buffer), " for class ");
 338                                         utf_sprint(buffer+strlen(buffer), n->classname);
 339
 340                                         log_text(buffer);
 341
 342                                         MFREE(buffer, char, buffer_len);
 343                                 }
 344                         }
 345 #endif
 346         }
 347
 348
 349         /* no function was found, display warning */
 350
 351         buffer_len =
 352                 utf_strlen(cname) + utf_strlen(mname) + utf_strlen(desc) + 64;
 353
 354         buffer = MNEW(char, buffer_len);
 355
 356         strcpy(buffer, "warning: native function ");
 357         utf_sprint(buffer + strlen(buffer), mname);
 358         strcpy(buffer + strlen(buffer), ": ");
 359         utf_sprint(buffer + strlen(buffer), desc);
 360         strcpy(buffer + strlen(buffer), " not found in class ");
 361         utf_sprint(buffer + strlen(buffer), cname);
 362
 363         log_text(buffer);
 364
 365         MFREE(buffer, char, buffer_len);
 366
 367 /*      exit(1); */
 368
 369         /* keep compiler happy */
 370         return NULL;
 371 #else
 372 /* dynamic classpath */
 373   return 0;
 374 #endif
 375 }
 376
 377
 378 /********************** function: javastring_new *******************************
 379
 380         creates a new object of type java/lang/String with the text of
 381         the specified utf8-string
 382
 383         return: pointer to the string or NULL if memory is exhausted.
 384
 385 *******************************************************************************/
 386
 387 java_lang_String *javastring_new(utf *u)
 388 {
 389         char *utf_ptr;                  /* current utf character in utf string    */
 390         u4 utflength;                   /* length of utf-string if uncompressed   */
 391         java_lang_String *s;                /* result-string                          */
 392         java_chararray *a;
 393         s4 i;
 394
 395         if (!u) {
 396                 *exceptionptr = new_nullpointerexception();
 397                 return NULL;
 398         }
 399
 400         utf_ptr = u->text;
 401         utflength = utf_strlen(u);
 402
 403         s = (java_lang_String *) builtin_new(class_java_lang_String);
 404         a = builtin_newarray_char(utflength);
 405
 406         /* javastring or character-array could not be created */
 407         if (!a || !s)
 408                 return NULL;
 409
 410         /* decompress utf-string */
 411         for (i = 0; i < utflength; i++)
 412                 a->data[i] = utf_nextu2(&utf_ptr);
 413
 414         /* set fields of the javastring-object */
 415         s->value  = a;
 416         s->offset = 0;
 417         s->count  = utflength;
 418
 419         return s;
 420 }
 421
 422
 423 /********************** function: javastring_new_char **************************
 424
 425         creates a new java/lang/String object which contains the convertet
 426         C-string passed via text.
 427
 428         return: the object pointer or NULL if memory is exhausted.
 429
 430 *******************************************************************************/
 431
 432 java_lang_String *javastring_new_char(char *text)
 433 {
 434         s4 i;
 435         s4 len;                /* length of the string */
 436         java_lang_String *s;   /* result-string */
 437         java_chararray *a;
 438
 439         if (!text) {
 440                 *exceptionptr = new_nullpointerexception();
 441                 return NULL;
 442         }
 443
 444         len = strlen(text);
 445
 446         s = (java_lang_String *) builtin_new(class_java_lang_String);
 447         a = builtin_newarray_char(len);
 448
 449         /* javastring or character-array could not be created */
 450         if (!a || !s)
 451                 return NULL;
 452
 453         /* copy text */
 454         for (i = 0; i < len; i++)
 455                 a->data[i] = text[i];
 456
 457         /* set fields of the javastring-object */
 458         s->value  = a;
 459         s->offset = 0;
 460         s->count  = len;
 461
 462         return s;
 463 }
 464
 465
 466 /************************* function javastring_tochar **************************
 467
 468         converts a Java string into a C string.
 469
 470         return: pointer to C string
 471
 472         Caution: every call of this function overwrites the previous string !!!
 473
 474 *******************************************************************************/
 475
 476 static char stringbuffer[MAXSTRINGSIZE];
 477
 478 char *javastring_tochar(java_objectheader *so)
 479 {
 480         java_lang_String *s = (java_lang_String *) so;
 481         java_chararray *a;
 482         s4 i;
 483
 484         if (!s)
 485                 return "";
 486
 487         a = s->value;
 488
 489         if (!a)
 490                 return "";
 491
 492         if (s->count > MAXSTRINGSIZE)
 493                 return "";
 494
 495         for (i = 0; i < s->count; i++)
 496                 stringbuffer[i] = a->data[s->offset + i];
 497
 498         stringbuffer[i] = '\0';
 499
 500         return stringbuffer;
 501 }
 502
 503
 504 /****************** function class_findfield_approx ****************************
 505
 506         searches in 'classinfo'-structure for a field with the
 507         specified name
 508
 509 *******************************************************************************/
 510
 511 fieldinfo *class_findfield_approx(classinfo *c, utf *name)
 512 {
 513         s4 i;
 514
 515         for (i = 0; i < c->fieldscount; i++) {
 516                 /* compare field names */
 517                 if ((c->fields[i].name == name))
 518                         return &(c->fields[i]);
 519         }
 520
 521         /* field was not found, raise exception */
 522         *exceptionptr = new_exception(string_java_lang_NoSuchFieldException);
 523
 524         return NULL;
 525 }
 526
 527
 528 s4 class_findfield_index_approx(classinfo *c, utf *name)
 529 {
 530         s4 i;
 531
 532         for (i = 0; i < c->fieldscount; i++) {
 533                 /* compare field names */
 534                 if ((c->fields[i].name == name))
 535                         return i;
 536         }
 537
 538         /* field was not found, raise exception */
 539         *exceptionptr = new_exception(string_java_lang_NoSuchFieldException);
 540
 541         return -1;
 542 }
 543
 544
 545 /********************** function: native_new_and_init *************************
 546
 547         Creates a new object on the heap and calls the initializer.
 548         Returns the object pointer or NULL if memory is exhausted.
 549
 550 *******************************************************************************/
 551
 552 java_objectheader *native_new_and_init(classinfo *c)
 553 {
 554         methodinfo *m;
 555         java_objectheader *o;
 556
 557         if (!c)
 558                 return *exceptionptr;
 559
 560         o = builtin_new(c);                 /* create object                      */
 561
 562         if (!o)
 563                 return NULL;
 564
 565         /* find initializer */
 566
 567         m = class_findmethod(c,
 568                                                  utf_new_char("<init>"),
 569                                                  utf_new_char("()V"));
 570
 571         if (!m) {                           /* initializer not found              */
 572                 if (verbose) {
 573                         char logtext[MAXLOGTEXT];
 574                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 575                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 576                         log_text(logtext);
 577                 }
 578                 return o;
 579         }
 580
 581         /* call initializer */
 582
 583         asm_calljavafunction(m, o, NULL, NULL, NULL);
 584
 585         return o;
 586 }
 587
 588
 589 java_objectheader *native_new_and_init_string(classinfo *c, java_lang_String *s)
 590 {
 591         methodinfo *m;
 592         java_objectheader *o;
 593
 594         if (!c)
 595                 return *exceptionptr;
 596
 597         o = builtin_new(c);          /* create object          */
 598
 599         if (!o)
 600                 return NULL;
 601
 602         /* find initializer */
 603
 604         m = class_findmethod(c,
 605                                                  utf_new_char("<init>"),
 606                                                  utf_new_char("(Ljava/lang/String;)V"));
 607
 608         if (!m) {                                       /* initializer not found  */
 609                 if (verbose) {
 610                         char logtext[MAXLOGTEXT];
 611                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 612                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 613                         log_text(logtext);
 614                 }
 615                 return o;
 616         }
 617
 618         /* call initializer */
 619
 620         asm_calljavafunction(m, o, s, NULL, NULL);
 621
 622         return o;
 623 }
 624
 625
 626 java_objectheader *native_new_and_init_int(classinfo *c, s4 i)
 627 {
 628         methodinfo *m;
 629         java_objectheader *o;
 630
 631         if (!c)
 632                 return *exceptionptr;
 633
 634         o = builtin_new(c);          /* create object          */
 635
 636         if (!o) return NULL;
 637
 638         /* find initializer */
 639
 640         m = class_findmethod(c,
 641                                                  utf_new_char("<init>"),
 642                                                  utf_new_char("(I)V"));
 643
 644         if (!m) {                                       /* initializer not found  */
 645                 if (verbose) {
 646                         char logtext[MAXLOGTEXT];
 647                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 648                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 649                         log_text(logtext);
 650                 }
 651                 return o;
 652         }
 653
 654         /* call initializer */
 655
 656 #if defined(__I386__) || defined(__POWERPC__)
 657         asm_calljavafunction(m, o, (void *) i, NULL, NULL);
 658 #else
 659         asm_calljavafunction(m, o, (void *) (s8) i, NULL, NULL);
 660 #endif
 661
 662         return o;
 663 }
 664
 665
 666 java_objectheader *native_new_and_init_throwable(classinfo *c, java_lang_Throwable *t)
 667 {
 668         methodinfo *m;
 669         java_objectheader *o;
 670
 671         if (!c)
 672                 return *exceptionptr;
 673
 674         o = builtin_new(c);          /* create object          */
 675
 676         if (!o) return NULL;
 677
 678         /* find initializer */
 679
 680         m = class_findmethod(c,
 681                                                  utf_new_char("<init>"),
 682                                                  utf_new_char("(Ljava/lang/Throwable;)V"));
 683
 684         if (!m) {                                       /* initializer not found  */
 685                 if (verbose) {
 686                         char logtext[MAXLOGTEXT];
 687                         sprintf(logtext, "Warning: class has no instance-initializer: ");
 688                         utf_sprint_classname(logtext + strlen(logtext), c->name);
 689                         log_text(logtext);
 690                 }
 691                 return o;
 692         }
 693
 694         /* call initializer */
 695
 696         asm_calljavafunction(m, o, t, NULL, NULL);
 697
 698         return o;
 699 }
 700
 701
 702 /******************** function: stringtable_update ****************************
 703
 704         traverses the javastring hashtable and sets the vftbl-entries of
 705         javastrings which were temporarily set to NULL, because
 706         java.lang.Object was not yet loaded
 707
 708 *******************************************************************************/
 709
 710 void stringtable_update ()
 711 {
 712         java_lang_String *js;
 713         java_chararray *a;
 714         literalstring *s;       /* hashtable entry */
 715         int i;
 716
 717         for (i = 0; i < string_hash.size; i++) {
 718                 s = string_hash.ptr[i];
 719                 if (s) {
 720                         while (s) {
 721
 722                                 js = (java_lang_String *) s->string;
 723
 724                                 if (!js || !js->value)
 725                                         /* error in hashtable found */
 726                                         panic("invalid literalstring in hashtable");
 727
 728                                 a = js->value;
 729
 730                                 if (!js->header.vftbl)
 731                                         /* vftbl of javastring is NULL */
 732                                         js->header.vftbl = class_java_lang_String->vftbl;
 733
 734                                 if (!a->header.objheader.vftbl)
 735                                         /* vftbl of character-array is NULL */
 736                                         a->header.objheader.vftbl = primitivetype_table[ARRAYTYPE_CHAR].arrayvftbl;
 737
 738                                 /* follow link in external hash chain */
 739                                 s = s->hashlink;
 740                         }
 741                 }
 742         }
 743 }
 744
 745
 746 /************************* function: u2_utflength ***************************
 747
 748         returns the utf length in bytes of a u2 array
 749
 750 *****************************************************************************/
 751
 752 u4 u2_utflength(u2 *text, u4 u2_length)
 753 {
 754         u4 result_len =  0;  /* utf length in bytes  */
 755         u2 ch;               /* current unicode character */
 756         u4 len;
 757
 758         for (len = 0; len < u2_length; len++) {
 759                 /* next unicode character */
 760                 ch = *text++;
 761
 762                 /* determine bytes required to store unicode character as utf */
 763                 if (ch && (ch < 0x80))
 764                         result_len++;
 765                 else if (ch < 0x800)
 766                         result_len += 2;
 767                 else
 768                         result_len += 3;
 769         }
 770
 771     return result_len;
 772 }
 773
 774
 775 /********************* function: utf_new_u2 ***********************************
 776
 777         make utf symbol from u2 array,
 778         if isclassname is true '.' is replaced by '/'
 779
 780 *******************************************************************************/
 781
 782 utf *utf_new_u2(u2 *unicode_pos, u4 unicode_length, bool isclassname)
 783 {
 784         char *buffer; /* memory buffer for  unicode characters */
 785         char *pos;    /* pointer to current position in buffer */
 786         u4 left;      /* unicode characters left */
 787         u4 buflength; /* utf length in bytes of the u2 array  */
 788         utf *result;  /* resulting utf-string */
 789         int i;
 790
 791         /* determine utf length in bytes and allocate memory */
 792         /* printf("utf_new_u2: unicode_length=%d\n",unicode_length);            */
 793         buflength = u2_utflength(unicode_pos, unicode_length);
 794         buffer    = MNEW(char, buflength);
 795
 796         left = buflength;
 797         pos  = buffer;
 798
 799         for (i = 0; i++ < unicode_length; unicode_pos++) {
 800                 /* next unicode character */
 801                 u2 c = *unicode_pos;
 802
 803                 if ((c != 0) && (c < 0x80)) {
 804                         /* 1 character */
 805                         left--;
 806                 if ((int) left < 0) break;
 807                         /* convert classname */
 808                         if (isclassname && c == '.')
 809                                 *pos++ = '/';
 810                         else
 811                                 *pos++ = (char) c;
 812
 813                 } else if (c < 0x800) {
 814                         /* 2 characters */
 815                 unsigned char high = c >> 6;
 816                 unsigned char low  = c & 0x3F;
 817                         left = left - 2;
 818                 if ((int) left < 0) break;
 819                 *pos++ = high | 0xC0;
 820                 *pos++ = low  | 0x80;
 821
 822                 } else {
 823                 /* 3 characters */
 824                 char low  = c & 0x3f;
 825                 char mid  = (c >> 6) & 0x3F;
 826                 char high = c >> 12;
 827                         left = left - 3;
 828                 if ((int) left < 0) break;
 829                 *pos++ = high | 0xE0;
 830                 *pos++ = mid  | 0x80;
 831                 *pos++ = low  | 0x80;
 832                 }
 833         }
 834
 835         /* insert utf-string into symbol-table */
 836         result = utf_new(buffer,buflength);
 837
 838         MFREE(buffer, char, buflength);
 839
 840         return result;
 841 }
 842
 843
 844 /********************* function: javastring_toutf *****************************
 845
 846         make utf symbol from javastring
 847
 848 *******************************************************************************/
 849
 850 utf *javastring_toutf(java_lang_String *string, bool isclassname)
 851 {
 852         java_lang_String *str = (java_lang_String *) string;
 853
 854 /*      printf("javastring_toutf offset: %d, len %d\n",str->offset, str->count); */
 855 /*      fflush(stdout); */
 856
 857         return utf_new_u2(str->value->data + str->offset, str->count, isclassname);
 858 }
 859
 860
 861 /********************* function: literalstring_u2 *****************************
 862
 863     searches for the javastring with the specified u2-array in
 864     the string hashtable, if there is no such string a new one is
 865     created
 866
 867     if copymode is true a copy of the u2-array is made
 868
 869 *******************************************************************************/
 870
 871 java_objectheader *literalstring_u2(java_chararray *a, u4 length, u4 offset,
 872                                                                         bool copymode)
 873 {
 874     literalstring *s;                /* hashtable element */
 875     java_lang_String *js;            /* u2-array wrapped in javastring */
 876     java_chararray *stringdata;      /* copy of u2-array */
 877         classinfo *c;
 878     u4 key;
 879     u4 slot;
 880     u2 i;
 881
 882 //#define DEBUG_LITERALSTRING_U2
 883 #ifdef DEBUG_LITERALSTRING_U2
 884     printf("literalstring_u2: length=%d, offset=%d\n", length, offset);
 885         fflush(stdout);
 886 #endif
 887
 888     /* find location in hashtable */
 889     key  = unicode_hashkey(a->data + offset, length);
 890     slot = key & (string_hash.size - 1);
 891     s    = string_hash.ptr[slot];
 892
 893     while (s) {
 894                 js = (java_lang_String *) s->string;
 895
 896                 if (length == js->count) {
 897                         /* compare text */
 898                         for (i = 0; i < length; i++) {
 899                                 if (a->data[offset + i] != js->value->data[i])
 900                                         goto nomatch;
 901                         }
 902
 903                         /* string already in hashtable, free memory */
 904                         if (!copymode)
 905                                 mem_free(a, sizeof(java_chararray) + sizeof(u2) * (length - 1) + 10);
 906
 907 #ifdef DEBUG_LITERALSTRING_U2
 908                         printf("literalstring_u2: foundentry at %p\n", js);
 909                         utf_display(javastring_toutf(js, 0));
 910                         printf("\n\n");
 911                         fflush(stdout);
 912 #endif
 913                         return (java_objectheader *) js;
 914                 }
 915
 916         nomatch:
 917                 /* follow link in external hash chain */
 918                 s = s->hashlink;
 919     }
 920
 921     if (copymode) {
 922                 /* create copy of u2-array for new javastring */
 923                 u4 arraysize = sizeof(java_chararray) + sizeof(u2) * (length - 1) + 10;
 924                 stringdata = mem_alloc(arraysize);
 925 /*              memcpy(stringdata, a, arraysize); */
 926                 memcpy(&(stringdata->header), &(a->header), sizeof(java_arrayheader));
 927                 memcpy(&(stringdata->data), &(a->data) + offset, sizeof(u2) * (length - 1) + 10);
 928
 929     } else {
 930                 stringdata = a;
 931         }
 932
 933     /* location in hashtable found, complete arrayheader */
 934     stringdata->header.objheader.vftbl = primitivetype_table[ARRAYTYPE_CHAR].arrayvftbl;
 935     stringdata->header.size = length;
 936
 937         /* if we use eager loading, we have to check loaded String class */
 938         if (opt_eager) {
 939                 class_java_lang_String =
 940                         class_new_intern(utf_new_char("java/lang/String"));
 941
 942                 if (!class_load(class_java_lang_String))
 943                         return NULL;
 944
 945                 list_addfirst(&unlinkedclasses, class_java_lang_String);
 946         }
 947
 948     /* create new javastring */
 949     js = NEW(java_lang_String);
 950 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
 951         initObjectLock(&js->header);
 952 #endif
 953         js->header.vftbl = class_java_lang_String->vftbl;
 954     js->value  = stringdata;
 955     js->offset = 0;
 956     js->count  = length;
 957
 958 #ifdef DEBUG_LITERALSTRING_U2
 959         printf("literalstring_u2: newly created at %p\n", js);
 960         utf_display(javastring_toutf(js, 0));
 961         printf("\n\n");
 962         fflush(stdout);
 963 #endif
 964
 965     /* create new literalstring */
 966     s = NEW(literalstring);
 967     s->hashlink = string_hash.ptr[slot];
 968     s->string   = (java_objectheader *) js;
 969     string_hash.ptr[slot] = s;
 970
 971     /* update number of hashtable entries */
 972     string_hash.entries++;
 973
 974     /* reorganization of hashtable */
 975     if (string_hash.entries > (string_hash.size * 2)) {
 976                 /* reorganization of hashtable, average length of
 977          the external chains is approx. 2                */
 978
 979                 u4 i;
 980                 literalstring *s;
 981                 hashtable newhash; /* the new hashtable */
 982
 983                 /* create new hashtable, double the size */
 984                 init_hashtable(&newhash, string_hash.size * 2);
 985                 newhash.entries = string_hash.entries;
 986
 987                 /* transfer elements to new hashtable */
 988                 for (i = 0; i < string_hash.size; i++) {
 989                         s = string_hash.ptr[i];
 990                         while (s) {
 991                                 literalstring *nexts = s->hashlink;
 992                                 js   = (java_lang_String *) s->string;
 993                                 slot = unicode_hashkey(js->value->data, js->count) & (newhash.size - 1);
 994
 995                                 s->hashlink = newhash.ptr[slot];
 996                                 newhash.ptr[slot] = s;
 997
 998                                 /* follow link in external hash chain */
 999                                 s = nexts;
1000                         }
1001                 }
1002
1003                 /* dispose old table */
1004                 MFREE(string_hash.ptr, void*, string_hash.size);
1005                 string_hash = newhash;
1006     }
1007
1008     return (java_objectheader *) js;
1009 }
1010
1011
1012 /******************** Function: literalstring_new *****************************
1013
1014     creates a new javastring with the text of the utf-symbol
1015     and inserts it into the string hashtable
1016
1017 *******************************************************************************/
1018
1019 java_objectheader *literalstring_new(utf *u)
1020 {
1021     char *utf_ptr = u->text;         /* pointer to current unicode character in utf string */
1022     u4 utflength  = utf_strlen(u);   /* length of utf-string if uncompressed */
1023     java_chararray *a;               /* u2-array constructed from utf string */
1024     u4 i;
1025
1026     /* allocate memory */
1027     a = mem_alloc(sizeof(java_chararray) + sizeof(u2) * (utflength - 1) + 10);
1028
1029     /* convert utf-string to u2-array */
1030     for (i = 0; i < utflength; i++)
1031                 a->data[i] = utf_nextu2(&utf_ptr);
1032
1033     return literalstring_u2(a, utflength, 0, false);
1034 }
1035
1036
1037 /********************** function: literalstring_free **************************
1038
1039         removes a javastring from memory
1040
1041 ******************************************************************************/
1042
1043 void literalstring_free(java_objectheader* sobj)
1044 {
1045         java_lang_String *s = (java_lang_String *) sobj;
1046         java_chararray *a = s->value;
1047
1048         /* dispose memory of java.lang.String object */
1049         FREE(s, java_lang_String);
1050
1051         /* dispose memory of java-characterarray */
1052         FREE(a, sizeof(java_chararray) + sizeof(u2) * (a->header.size - 1)); /* +10 ?? */
1053 }
1054
1055
1056 void copy_vftbl(vftbl_t **dest, vftbl_t *src)
1057 {
1058     *dest = src;
1059 #if 0
1060     /* XXX this kind of copying does not work (in the general
1061      * case). The interface tables would have to be copied, too. I
1062      * don't see why we should make a copy anyway. -Edwin
1063      */
1064         *dest = mem_alloc(sizeof(vftbl) + sizeof(methodptr)*(src->vftbllength-1));
1065         memcpy(*dest, src, sizeof(vftbl) - sizeof(methodptr));
1066         memcpy(&(*dest)->table, &src->table, src->vftbllength * sizeof(methodptr));
1067 #endif
1068 }
1069
1070
1071 /******************************************************************************************
1072
1073         creates method signature (excluding return type) from array of
1074         class-objects representing the parameters of the method
1075
1076 *******************************************************************************************/
1077
1078
1079 utf *create_methodsig(java_objectarray* types, char *retType)
1080 {
1081     char *buffer;       /* buffer for building the desciptor */
1082     char *pos;          /* current position in buffer */
1083     utf *result;        /* the method signature */
1084     u4 buffer_size = 3; /* minimal size=3: room for parenthesis and returntype */
1085     u4 i, j;
1086
1087     if (!types) return NULL;
1088
1089     /* determine required buffer-size */
1090     for (i = 0; i < types->header.size; i++) {
1091                 classinfo *c = (classinfo *) types->data[i];
1092                 buffer_size  = buffer_size + c->name->blength + 2;
1093     }
1094
1095     if (retType) buffer_size += strlen(retType);
1096
1097     /* allocate buffer */
1098     buffer = MNEW(u1, buffer_size);
1099     pos    = buffer;
1100
1101     /* method-desciptor starts with parenthesis */
1102     *pos++ = '(';
1103
1104     for (i = 0; i < types->header.size; i++) {
1105                 char ch;
1106
1107                 /* current argument */
1108             classinfo *c = (classinfo *) types->data[i];
1109
1110             /* current position in utf-text */
1111             char *utf_ptr = c->name->text;
1112
1113             /* determine type of argument */
1114             if ((ch = utf_nextu2(&utf_ptr)) == '[') {
1115                 /* arrayclass */
1116                 for (utf_ptr--; utf_ptr < utf_end(c->name); utf_ptr++) {
1117                                 *pos++ = *utf_ptr; /* copy text */
1118                         }
1119
1120             } else {
1121                         /* check for primitive types */
1122                         for (j = 0; j < PRIMITIVETYPE_COUNT; j++) {
1123                                 char *utf_pos   = utf_ptr - 1;
1124                                 char *primitive = primitivetype_table[j].wrapname;
1125
1126                                 /* compare text */
1127                                 while (utf_pos < utf_end(c->name)) {
1128                                         if (*utf_pos++ != *primitive++) goto nomatch;
1129                                 }
1130
1131                                 /* primitive type found */
1132                                 *pos++ = primitivetype_table[j].typesig;
1133                                 goto next_type;
1134
1135                         nomatch:
1136                                 ;
1137                         }
1138
1139                         /* no primitive type and no arrayclass, so must be object */
1140                         *pos++ = 'L';
1141
1142                         /* copy text */
1143                         for (utf_ptr--; utf_ptr < utf_end(c->name); utf_ptr++) {
1144                                 *pos++ = *utf_ptr;
1145                         }
1146
1147                         *pos++ = ';';
1148
1149                 next_type:
1150                         ;
1151                 }
1152     }
1153
1154     *pos++ = ')';
1155
1156     if (retType) {
1157                 for (i = 0; i < strlen(retType); i++) {
1158                         *pos++ = retType[i];
1159                 }
1160     }
1161
1162     /* create utf-string */
1163     result = utf_new(buffer, (pos - buffer));
1164     MFREE(buffer, u1, buffer_size);
1165
1166     return result;
1167 }
1168
1169
1170 /******************************************************************************************
1171
1172         retrieve the next argument or returntype from a descriptor
1173         and return the corresponding class
1174
1175 *******************************************************************************************/
1176
1177 classinfo *get_type(char **utf_ptr,char *desc_end, bool skip)
1178 {
1179     classinfo *c = class_from_descriptor(*utf_ptr,desc_end,utf_ptr,
1180                                          (skip) ? CLASSLOAD_SKIP : CLASSLOAD_LOAD);
1181     if (!c)
1182         /* unknown type */
1183         panic("illegal descriptor");
1184
1185     if (skip) return NULL;
1186
1187     use_class_as_object(c);
1188     return c;
1189 }
1190
1191
1192 /* get_parametertypes **********************************************************
1193
1194    use the descriptor of a method to generate a java/lang/Class array
1195    which contains the classes of the parametertypes of the method
1196
1197 *******************************************************************************/
1198
1199 java_objectarray* get_parametertypes(methodinfo *m)
1200 {
1201     utf  *descr    =  m->descriptor;    /* method-descriptor */
1202     char *utf_ptr  =  descr->text;      /* current position in utf-text */
1203     char *desc_end =  utf_end(descr);   /* points behind utf string     */
1204     java_objectarray* result;
1205     int parametercount = 0;
1206     int i;
1207
1208     /* skip '(' */
1209     utf_nextu2(&utf_ptr);
1210
1211     /* determine number of parameters */
1212     while (*utf_ptr != ')') {
1213         get_type(&utf_ptr, desc_end, true);
1214                 parametercount++;
1215     }
1216
1217     /* create class-array */
1218     result = builtin_anewarray(parametercount, class_java_lang_Class);
1219
1220     utf_ptr = descr->text;
1221     utf_nextu2(&utf_ptr);
1222
1223     /* get returntype classes */
1224     for (i = 0; i < parametercount; i++)
1225             result->data[i] =
1226                         (java_objectheader *) get_type(&utf_ptr, desc_end, false);
1227
1228     return result;
1229 }
1230
1231
1232 /* get_exceptiontypes **********************************************************
1233
1234    get the exceptions which can be thrown by a method
1235
1236 *******************************************************************************/
1237
1238 java_objectarray* get_exceptiontypes(methodinfo *m) {
1239     u2 exccount=m->thrownexceptionscount;
1240     u2 i;
1241     java_objectarray *result;
1242     /* create class-array */
1243     result = builtin_anewarray(exccount, class_java_lang_Class);
1244     for (i=0;i<exccount;i++) {
1245         java_objectheader *oh=(java_objectheader*)(m->thrownexceptions[i]);
1246         use_class_as_object(oh);
1247         result->data[i]=oh;
1248     }
1249     return result;
1250 }
1251
1252
1253
1254
1255
1256 /******************************************************************************************
1257
1258         get the returntype class of a method
1259
1260 *******************************************************************************************/
1261
1262 classinfo *get_returntype(methodinfo *m)
1263 {
1264         char *utf_ptr;   /* current position in utf-text */
1265         char *desc_end;  /* points behind utf string     */
1266         utf *desc = m->descriptor; /* method-descriptor  */
1267
1268         utf_ptr  = desc->text;
1269         desc_end = utf_end(desc);
1270
1271         /* ignore parametertypes */
1272         while ((utf_ptr<desc_end) && utf_nextu2(&utf_ptr)!=')')
1273                 /* skip */ ;
1274
1275         return get_type(&utf_ptr,desc_end, false);
1276 }
1277
1278
1279 /*****************************************************************************/
1280 /*****************************************************************************/
1281
1282
1283 /*--------------------------------------------------------*/
1284 void printNativeCall(nativeCall nc) {
1285   int i,j;
1286
1287   printf("\n%s's Native Methods call:\n",nc.classname); fflush(stdout);
1288   for (i=0; i<nc.methCnt; i++) {
1289       printf("\tMethod=%s %s\n",nc.methods[i].methodname, nc.methods[i].descriptor);fflush(stdout);
1290
1291     for (j=0; j<nc.callCnt[i]; j++) {
1292         printf("\t\t<%i,%i>aCalled = %s %s %s\n",i,j,
1293         nc.methods[i].methodCalls[j].classname,
1294         nc.methods[i].methodCalls[j].methodname,
1295         nc.methods[i].methodCalls[j].descriptor);fflush(stdout);
1296       }
1297     }
1298   printf("-+++++--------------------\n");fflush(stdout);
1299 }
1300
1301 /*--------------------------------------------------------*/
1302 void printCompNativeCall(nativeCompCall nc) {
1303   int i,j;
1304   printf("printCompNativeCall BEGIN\n");fflush(stdout);
1305   printf("\n%s's Native Comp Methods call:\n",nc.classname->text);fflush(stdout);
1306   utf_display(nc.classname); fflush(stdout);
1307
1308   for (i=0; i<nc.methCnt; i++) {
1309     printf("\tMethod=%s %s\n",nc.methods[i].methodname->text,nc.methods[i].descriptor->text);fflush(stdout);
1310     utf_display(nc.methods[i].methodname); fflush(stdout);
1311     utf_display(nc.methods[i].descriptor);fflush(stdout);
1312     printf("\n");fflush(stdout);
1313
1314     for (j=0; j<nc.callCnt[i]; j++) {
1315       printf("\t\t<%i,%i>bCalled = ",i,j);fflush(stdout);
1316         utf_display(nc.methods[i].methodCalls[j].classname);fflush(stdout);
1317         utf_display(nc.methods[i].methodCalls[j].methodname); fflush(stdout);
1318         utf_display(nc.methods[i].methodCalls[j].descriptor);fflush(stdout);
1319         printf("\n");fflush(stdout);
1320       }
1321     }
1322 printf("---------------------\n");fflush(stdout);
1323 }
1324
1325
1326 /*--------------------------------------------------------*/
1327 classMeth findNativeMethodCalls(utf *c, utf *m, utf *d )
1328 {
1329     int i = 0;
1330     int j = 0;
1331     int cnt = 0;
1332     classMeth mc;
1333     mc.i_class = i;
1334     mc.j_method = j;
1335     mc.methCnt = cnt;
1336
1337     return mc;
1338 }
1339
1340 /*--------------------------------------------------------*/
1341 nativeCall* findNativeClassCalls(char *aclassname ) {
1342 int i;
1343
1344 for (i=0;i<NATIVECALLSSIZE; i++) {
1345    /* convert table to utf later to speed up search */
1346    if (strcmp(nativeCalls[i].classname, aclassname) == 0)
1347         return &nativeCalls[i];
1348    }
1349
1350 return NULL;
1351 }
1352 /*--------------------------------------------------------*/
1353 /*--------------------------------------------------------*/
1354 void utfNativeCall(nativeCall nc, nativeCompCall *ncc) {
1355   int i,j;
1356
1357
1358   ncc->classname = utf_new_char(nc.classname);
1359   ncc->methCnt = nc.methCnt;
1360
1361   for (i=0; i<nc.methCnt; i++) {
1362     ncc->methods[i].methodname = utf_new_char(nc.methods[i].methodname);
1363     ncc->methods[i].descriptor = utf_new_char(nc.methods[i].descriptor);
1364     ncc->callCnt[i] = nc.callCnt[i];
1365
1366     for (j=0; j<nc.callCnt[i]; j++) {
1367
1368         ncc->methods[i].methodCalls[j].classname  = utf_new_char(nc.methods[i].methodCalls[j].classname);
1369
1370         if (strcmp("", nc.methods[i].methodCalls[j].methodname) != 0) {
1371           ncc->methods[i].methodCalls[j].methodname = utf_new_char(nc.methods[i].methodCalls[j].methodname);
1372           ncc->methods[i].methodCalls[j].descriptor = utf_new_char(nc.methods[i].methodCalls[j].descriptor);
1373           }
1374         else {
1375           ncc->methods[i].methodCalls[j].methodname = NULL;
1376           ncc->methods[i].methodCalls[j].descriptor = NULL;
1377           }
1378       }
1379     }
1380 }
1381
1382
1383
1384 /*--------------------------------------------------------*/
1385
1386 bool natcall2utf(bool natcallcompdone) {
1387 int i;
1388
1389 if (natcallcompdone)
1390         return true;
1391
1392 for (i=0;i<NATIVECALLSSIZE; i++) {
1393    utfNativeCall  (nativeCalls[i], &nativeCompCalls[i]);
1394    }
1395
1396 return true;
1397 }
1398
1399 /*--------------------------------------------------------*/
1400
1401
1402 java_objectarray *builtin_asm_createclasscontextarray(classinfo **end,classinfo **start)
1403 {
1404 #if defined(__GNUC__)
1405 #warning platform dependend
1406 #endif
1407         java_objectarray *tmpArray;
1408         int i;
1409         classinfo **current;
1410         classinfo *c;
1411         size_t size=(((size_t)start)-((size_t)end)) / sizeof (classinfo*);
1412         /*printf("end %p, start %p, size %ld\n",end,start,size);*/
1413         if (!class_java_lang_Class)
1414                 class_java_lang_Class = class_new(utf_new_char ("java/lang/Class"));
1415         if (!class_java_lang_SecurityManager)
1416                 class_java_lang_SecurityManager = class_new(utf_new_char ("java/lang/SecurityManager"));
1417         if (size>0) {
1418                 if (start==class_java_lang_SecurityManager) {
1419                         size--;
1420                         start--;
1421                 }
1422         }
1423         tmpArray=builtin_newarray(size, class_array_of(class_java_lang_Class)->vftbl);
1424
1425         for(i=0,current=start;i<size;i++,current--) {
1426                 c=*current;
1427 /*              printf("%d\n",i);
1428                 utf_display(c->name);*/
1429                 use_class_as_object(c);
1430                 tmpArray->data[i]=c;
1431         }
1432         return tmpArray;
1433
1434 }
1435
1436 java_lang_ClassLoader *builtin_asm_getclassloader(classinfo **end,classinfo **start)
1437 {
1438 #if defined(__GNUC__)
1439 #warning platform dependend
1440 #endif
1441         int i;
1442         classinfo **current;
1443         classinfo *c;
1444         classinfo *privilegedAction;
1445         size_t size=(((size_t)start)-((size_t)end)) / sizeof (classinfo*);
1446 /*      log_text("builtin_asm_getclassloader");
1447         printf("end %p, start %p, size %ld\n",end,start,size);*/
1448
1449         if (!class_java_lang_SecurityManager)
1450                 class_java_lang_SecurityManager = class_new(utf_new_char ("java/lang/SecurityManager"));
1451         if (size>0) {
1452                 if (start==class_java_lang_SecurityManager) {
1453                         size--;
1454                         start--;
1455                 }
1456         }
1457
1458         privilegedAction=class_new(utf_new_char("java/security/PrivilegedAction"));
1459
1460         for(i=0,current=start;i<size;i++,current--) {
1461                 c=*current;
1462                 if (c==privilegedAction) return NULL;
1463                 if (c->classloader) return c->classloader;
1464         }
1465         return NULL;
1466
1467
1468
1469
1470 /*
1471         log_text("Java_java_lang_VMSecurityManager_currentClassLoader");
1472         init_systemclassloader();
1473
1474         return SystemClassLoader;*/
1475 }
1476
1477 /*
1478  * These are local overrides for various environment variables in Emacs.
1479  * Please do not remove this and leave it at the end of the file, where
1480  * Emacs will automagically detect them.
1481  * ---------------------------------------------------------------------
1482  * Local variables:
1483  * mode: c
1484  * indent-tabs-mode: t
1485  * c-basic-offset: 4
1486  * tab-width: 4
1487  * End:
1488  */