lib/as3/abc.c

   1 /* abc.c
   2
   3    Routines for handling Flash2 AVM2 ABC Actionscript
   4
   5    Extension module for the rfxswf library.
   6    Part of the swftools package.
   7
   8    Copyright (c) 2008 Matthias Kramm <kramm@quiss.org>
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU 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  02111-1307  USA */
  23
  24 #include <stdarg.h>
  25 #include <assert.h>
  26 #include "../rfxswf.h"
  27 #include "../q.h"
  28 #include "abc.h"
  29 #include "assets.h"
  30
  31 char stringbuffer[2048];
  32
  33 int abc_RegisterNameSpace(abc_file_t*file, const char*name);
  34 int abc_RegisterPackageNameSpace(abc_file_t*file, const char*name);
  35 int abc_RegisterPackageInternalNameSpace(abc_file_t*file, const char*name);
  36 int abc_RegisterProtectedNameSpace(abc_file_t*file, const char*name);
  37 int abc_RegisterExplicitNameSpace(abc_file_t*file, const char*name);
  38 int abc_RegisterStaticProtectedNameSpace(abc_file_t*file, const char*name);
  39 int abc_RegisterPrivateNameSpace(abc_file_t*file, const char*name);
  40
  41 /* TODO: switch to a datastructure with just values */
  42 #define NO_KEY ""
  43
  44 static void params_dump(FILE*fo, multiname_list_t*l, constant_list_t*o)
  45 {
  46     int n = list_length(l);
  47     int no = list_length(o);
  48     int i = 0;
  49
  50     fprintf(fo, "(");
  51     while(l) {
  52         char*s = multiname_tostring(l->multiname);
  53         fprintf(fo, "%s", s);
  54         free(s);
  55         if(i>=n-no) {
  56             s = constant_tostring(o->constant);
  57             fprintf(fo, " = ");
  58             fprintf(fo, "%s", s);
  59             free(s);
  60             o = o->next;
  61         }
  62
  63         if(l->next)
  64             fprintf(fo, ", ");
  65         l = l->next;i++;
  66     }
  67     fprintf(fo, ")");
  68 }
  69
  70 //#define DEBUG
  71 #define DEBUG if(0)
  72
  73 static void parse_metadata(TAG*tag, abc_file_t*file, pool_t*pool)
  74 {
  75     int t;
  76     int num_metadata = swf_GetU30(tag);
  77
  78     DEBUG printf("%d metadata\n", num_metadata);
  79     for(t=0;t<num_metadata;t++) {
  80         const char*entry_name = pool_lookup_string(pool, swf_GetU30(tag));
  81         int num = swf_GetU30(tag);
  82         int s;
  83         DEBUG printf("  %s\n", entry_name);
  84         array_t*items = array_new();
  85         for(s=0;s<num;s++) {
  86             int i1 = swf_GetU30(tag);
  87             int i2 = swf_GetU30(tag);
  88             const char*key = i1?pool_lookup_string(pool, i1):"";
  89             const char*value = i2?pool_lookup_string(pool, i2):"";
  90             DEBUG printf("    %s=%s\n", key, value);
  91             array_append(items, key, strdup(value));
  92         }
  93         array_append(file->metadata, entry_name, items);
  94     }
  95 }
  96
  97 void swf_CopyData(TAG*to, TAG*from, int len)
  98 {
  99     unsigned char*data = malloc(len);
 100     swf_GetBlock(from, data, len);
 101     swf_SetBlock(to, data, len);
 102     free(data);
 103 }
 104
 105 abc_file_t*abc_file_new()
 106 {
 107     abc_file_t*f = malloc(sizeof(abc_file_t));
 108     memset(f, 0, sizeof(abc_file_t));
 109     f->metadata = array_new();
 110
 111     f->methods = array_new();
 112     f->classes = array_new();
 113     f->scripts = array_new();
 114     f->method_bodies = array_new();
 115     f->flags = ABCFILE_LAZY;
 116
 117     return f;
 118 }
 119
 120 abc_class_t* abc_class_new(abc_file_t*file, multiname_t*classname, multiname_t*superclass) {
 121
 122     NEW(abc_class_t,c);
 123     if(file)
 124         array_append(file->classes, NO_KEY, c);
 125
 126     c->file = file;
 127     c->classname = multiname_clone(classname);
 128     c->superclass = multiname_clone(superclass);
 129     c->flags = 0;
 130     c->constructor = 0;
 131     c->static_constructor = 0;
 132     c->traits = list_new();
 133     return c;
 134 }
 135 abc_class_t* abc_class_new2(abc_file_t*pool, char*classname, char*superclass)
 136 {
 137     return abc_class_new(pool, multiname_fromstring(classname), multiname_fromstring(superclass));
 138 }
 139
 140 void abc_class_sealed(abc_class_t*c)
 141 {
 142     c->flags |= CLASS_SEALED;
 143 }
 144 void abc_class_final(abc_class_t*c)
 145 {
 146     c->flags |= CLASS_FINAL;
 147 }
 148 void abc_class_interface(abc_class_t*c)
 149 {
 150     c->flags |= CLASS_INTERFACE;
 151 }
 152 void abc_class_protectedNS(abc_class_t*c, char*namespace)
 153 {
 154     c->protectedNS = namespace_new_protected(namespace);
 155     c->flags |= CLASS_PROTECTED_NS;
 156 }
 157 void abc_class_add_interface(abc_class_t*c, multiname_t*interface)
 158 {
 159     list_append(c->interfaces, multiname_clone(interface));
 160 }
 161 char*abc_class_fullname(abc_class_t*cls)
 162 {
 163     const char*package = cls->classname->ns->name;
 164     const char*name = cls->classname->name;
 165     int l1 = strlen(package);
 166     int l2 = strlen(name);
 167     char*fullname = malloc(l1+l2+2);
 168     if(l1) {
 169         memcpy(fullname, package, l1);
 170         fullname[l1++]='.';
 171     }
 172     memcpy(fullname+l1, name, l2+1);
 173     return fullname;
 174 }
 175
 176 void abc_method_init(abc_method_t*m, abc_file_t*file, multiname_t*returntype, char body)
 177 {
 178     /* construct method object */
 179     m->index = array_length(file->methods);
 180     array_append(file->methods, NO_KEY, m);
 181     m->return_type = returntype;
 182
 183     if(body) {
 184         /* construct code (method body) object */
 185         NEW(abc_method_body_t,c);
 186         array_append(file->method_bodies, NO_KEY, c);
 187         c->index = array_length(file->method_bodies);
 188         c->file = file;
 189         c->traits = list_new();
 190         c->code = 0;
 191
 192         /* crosslink the two objects */
 193         m->body = c;
 194         c->method = m;
 195     }
 196 }
 197 abc_method_t* abc_method_new(abc_file_t*file, multiname_t*returntype, char body)
 198 {
 199     NEW(abc_method_t,m);
 200     abc_method_init(m, file, returntype, body);
 201     return m;
 202 }
 203
 204 abc_method_t* abc_class_getconstructor(abc_class_t*cls, multiname_t*returntype)
 205 {
 206     if(cls->constructor) {
 207         return cls->constructor;
 208     }
 209     abc_method_t* m = abc_method_new(cls->file, returntype, 1);
 210     cls->constructor = m;
 211     return m;
 212 }
 213
 214 abc_method_t* abc_class_getstaticconstructor(abc_class_t*cls, multiname_t*returntype)
 215 {
 216     if(cls->static_constructor) {
 217         return cls->static_constructor;
 218     }
 219     abc_method_t* m = abc_method_new(cls->file, returntype, 1);
 220     cls->static_constructor = m;
 221     return m;
 222 }
 223
 224 trait_t*trait_new(int type, multiname_t*name, int data1, int data2, constant_t*v)
 225 {
 226     trait_t*trait = malloc(sizeof(trait_t));
 227     memset(trait, 0, sizeof(trait_t));
 228     trait->kind = type&0x0f;
 229     trait->attributes = type&0xf0;
 230     trait->name = name;
 231     trait->data1 = data1;
 232     trait->data2 = data2;
 233     trait->value = v;
 234     return trait;
 235 }
 236
 237 trait_t*trait_new_member(trait_list_t**traits, multiname_t*type, multiname_t*name,constant_t*v)
 238 {
 239     int kind = TRAIT_SLOT;
 240     trait_t*trait = malloc(sizeof(trait_t));
 241     memset(trait, 0, sizeof(trait_t));
 242     trait->kind = kind&0x0f;
 243     trait->attributes = kind&0xf0;
 244     trait->name = name;
 245     trait->type_name = type;
 246
 247     trait->slot_id = list_length(*traits)+1;
 248     trait_list_t*l = *traits;
 249     list_append_(traits, trait);
 250     return trait;
 251 }
 252 trait_t*trait_new_method(trait_list_t**traits, multiname_t*name, abc_method_t*m)
 253 {
 254     int type = TRAIT_METHOD;
 255     trait_t*trait = malloc(sizeof(trait_t));
 256     memset(trait, 0, sizeof(trait_t));
 257     trait->kind = type&0x0f;
 258     trait->attributes = type&0xf0;
 259     trait->name = name;
 260     trait->method = m;
 261
 262     /* start assigning traits at position #1.
 263        Weird things happen when assigning slot 0- slot 0 and 1 seem
 264        to be identical */
 265     trait->slot_id = list_length(*traits)+1;
 266     list_append_(traits, trait);
 267     return trait;
 268 }
 269
 270 abc_method_t* abc_class_method(abc_class_t*cls, multiname_t*returntype, multiname_t*name)
 271 {
 272     abc_file_t*file = cls->file;
 273     abc_method_t* m = abc_method_new(cls->file, returntype, !(cls->flags&CLASS_INTERFACE));
 274     m->trait = trait_new_method(&cls->traits, multiname_clone(name), m);
 275     return m;
 276 }
 277 abc_method_t* abc_class_staticmethod(abc_class_t*cls, multiname_t*returntype, multiname_t*name)
 278 {
 279     abc_file_t*file = cls->file;
 280     abc_method_t* m = abc_method_new(cls->file, returntype, !(cls->flags&CLASS_INTERFACE));
 281     m->trait = trait_new_method(&cls->static_traits, multiname_clone(name), m);
 282     return m;
 283 }
 284
 285 trait_t* abc_class_slot(abc_class_t*cls, multiname_t*name, multiname_t*type)
 286 {
 287     abc_file_t*file = cls->file;
 288     multiname_t*m_name = multiname_clone(name);
 289     multiname_t*m_type = multiname_clone(type);
 290     trait_t*t = trait_new_member(&cls->traits, m_type, m_name, 0);
 291     return t;
 292 }
 293 trait_t* abc_class_staticslot(abc_class_t*cls, multiname_t*name, multiname_t*type)
 294 {
 295     abc_file_t*file = cls->file;
 296     multiname_t*m_name = multiname_clone(name);
 297     multiname_t*m_type = multiname_clone(type);
 298     trait_t*t = trait_new_member(&cls->static_traits, m_type, m_name, 0);
 299     return t;
 300 }
 301
 302
 303 trait_t* traits_find_slotid(trait_list_t*traits, int slotid)
 304 {
 305     trait_list_t*l;
 306     trait_t*t=0;
 307     for(l=traits;l;l=l->next) {
 308         if(l->trait->slot_id==slotid) {
 309             t=l->trait;
 310             break;
 311         }
 312     }
 313     return t;
 314 }
 315
 316 void abc_method_body_addClassTrait(abc_method_body_t*code, char*multiname, int slotid, abc_class_t*cls)
 317 {
 318     abc_file_t*file = code->file;
 319     multiname_t*m = multiname_fromstring(multiname);
 320     trait_t*trait = trait_new(TRAIT_CLASS, m, slotid, 0, 0);
 321     trait->cls = cls;
 322     list_append(code->traits, trait);
 323 }
 324
 325 /* notice: traits of a method (body) belonging to an init script
 326    and traits of the init script are *not* the same thing */
 327 trait_t* abc_initscript_addClassTrait(abc_script_t*script, multiname_t*multiname, abc_class_t*cls)
 328 {
 329     abc_file_t*file = script->file;
 330     multiname_t*m = multiname_clone(multiname);
 331     int slotid = list_length(script->traits)+1;
 332     trait_t*trait = trait_new(TRAIT_CLASS, m, slotid, 0, 0);
 333     trait->cls = cls;
 334     list_append(script->traits, trait);
 335     return trait;
 336 }
 337
 338 abc_script_t* abc_initscript(abc_file_t*file)
 339 {
 340     abc_method_t*m = abc_method_new(file, 0, 1);
 341     abc_script_t* s = malloc(sizeof(abc_script_t));
 342     s->method = m;
 343     s->traits = list_new();
 344     s->file = file;
 345     array_append(file->scripts, NO_KEY, s);
 346     return s;
 347 }
 348
 349 static void traits_dump(FILE*fo, const char*prefix, trait_list_t*traits, abc_file_t*file, dict_t*methods_seen);
 350
 351 static void dump_method(FILE*fo, const char*prefix,
 352                                  const char*attr,
 353                                  const char*type,
 354                                  const char*name,
 355                                  abc_method_t*m, abc_file_t*file, dict_t*methods_seen)
 356 {
 357     if(methods_seen)
 358         dict_put(methods_seen, m, 0);
 359
 360     char*return_type = 0;
 361     if(m->return_type)
 362         return_type = multiname_tostring(m->return_type);
 363     else
 364         return_type = strdup("*");
 365
 366     fprintf(fo, "%s", prefix);
 367     fprintf(fo, "%s %s ", attr, type);
 368     fprintf(fo, "%s %s=%s", return_type, name, m->name);
 369     params_dump(fo, m->parameters, m->optional_parameters);
 370     fprintf(fo, "(%d params, %d optional)\n", list_length(m->parameters), list_length(m->optional_parameters));
 371
 372     free(return_type);return_type=0;
 373
 374     abc_method_body_t*c = m->body;
 375     if(!c) {
 376         return;
 377     }
 378
 379     fprintf(fo, "%s[stack:%d locals:%d scope:%d-%d flags:",
 380             prefix, c->old.max_stack, c->old.local_count, c->old.init_scope_depth,
 381             c->old.max_scope_depth);
 382
 383
 384     int flags = c->method->flags;
 385     if(flags&METHOD_NEED_ARGUMENTS) {fprintf(fo, " need_arguments");flags&=~METHOD_NEED_ARGUMENTS;}
 386     if(flags&METHOD_NEED_ACTIVATION) {fprintf(fo, " need_activation");flags&=~METHOD_NEED_ACTIVATION;}
 387     if(flags&METHOD_NEED_REST) {fprintf(fo, " need_rest");flags&=~METHOD_NEED_REST;}
 388     if(flags&METHOD_HAS_OPTIONAL) {fprintf(fo, " has_optional");flags&=~METHOD_HAS_OPTIONAL;}
 389     if(flags&METHOD_SET_DXNS) {fprintf(fo, " set_dxns");flags&=~METHOD_SET_DXNS;}
 390     if(flags&METHOD_HAS_PARAM_NAMES) {fprintf(fo, " has_param_names");flags&=~METHOD_HAS_PARAM_NAMES;}
 391     if(flags) fprintf(fo, " %02x", flags);
 392     fprintf(fo, "]");
 393
 394     if(m->trait) {
 395         fprintf(fo, " slot:%d", m->trait->slot_id);
 396     }
 397     fprintf(fo, "\n");
 398
 399
 400     char prefix2[80];
 401     sprintf(prefix2, "%s    ", prefix);
 402     if(c->traits)
 403         traits_dump(fo, prefix, c->traits, file, methods_seen);
 404     fprintf(fo, "%s{\n", prefix);
 405     code_dump2(c->code, c->exceptions, file, prefix2, fo);
 406     fprintf(fo, "%s}\n\n", prefix);
 407 }
 408
 409 static void traits_free(trait_list_t*traits)
 410 {
 411     trait_list_t*t = traits;
 412     while(t) {
 413         if(t->trait->name) {
 414             multiname_destroy(t->trait->name);t->trait->name = 0;
 415         }
 416         if(t->trait->kind == TRAIT_SLOT || t->trait->kind == TRAIT_CONST) {
 417             multiname_destroy(t->trait->type_name);
 418         }
 419         if(t->trait->value) {
 420             constant_free(t->trait->value);t->trait->value = 0;
 421         }
 422         free(t->trait);t->trait = 0;
 423         t = t->next;
 424     }
 425     list_free(traits);
 426 }
 427
 428 static char trait_is_method(trait_t*trait)
 429 {
 430     return (trait->kind == TRAIT_METHOD || trait->kind == TRAIT_GETTER ||
 431             trait->kind == TRAIT_SETTER || trait->kind == TRAIT_FUNCTION);
 432 }
 433
 434 static trait_list_t* traits_parse(TAG*tag, pool_t*pool, abc_file_t*file)
 435 {
 436     int num_traits = swf_GetU30(tag);
 437     trait_list_t*traits = list_new();
 438     int t;
 439     if(num_traits) {
 440         DEBUG printf("%d traits\n", num_traits);
 441     }
 442
 443     for(t=0;t<num_traits;t++) {
 444         NEW(trait_t,trait);
 445         list_append(traits, trait);
 446
 447         trait->name = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag))); // always a QName (ns,name)
 448
 449         const char*name = 0;
 450         DEBUG name = multiname_tostring(trait->name);
 451         U8 kind = swf_GetU8(tag);
 452         U8 attributes = kind&0xf0;
 453         kind&=0x0f;
 454         trait->kind = kind;
 455         trait->attributes = attributes;
 456         DEBUG printf("  trait %d) %s type=%02x\n", t, name, kind);
 457         if(kind == TRAIT_METHOD || kind == TRAIT_GETTER || kind == TRAIT_SETTER) { // method / getter / setter
 458             trait->disp_id = swf_GetU30(tag);
 459             trait->method = (abc_method_t*)array_getvalue(file->methods, swf_GetU30(tag));
 460             trait->method->trait = trait;
 461             DEBUG printf("  method/getter/setter\n");
 462         } else if(kind == TRAIT_FUNCTION) { // function
 463             trait->slot_id =  swf_GetU30(tag);
 464             trait->method = (abc_method_t*)array_getvalue(file->methods, swf_GetU30(tag));
 465             trait->method->trait = trait;
 466         } else if(kind == TRAIT_CLASS) { // class
 467             trait->slot_id = swf_GetU30(tag);
 468             trait->cls = (abc_class_t*)array_getvalue(file->classes, swf_GetU30(tag));
 469             DEBUG printf("  class %s %d %08x\n", name, trait->slot_id, (int)trait->cls);
 470         } else if(kind == TRAIT_SLOT || kind == TRAIT_CONST) { // slot, const
 471             trait->slot_id = swf_GetU30(tag);
 472             trait->type_name = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
 473             int vindex = swf_GetU30(tag);
 474             if(vindex) {
 475                 int vkind = swf_GetU8(tag);
 476                 trait->value = constant_fromindex(pool, vindex, vkind);
 477             }
 478             DEBUG printf("  slot %s %d %s (%s)\n", name, trait->slot_id, trait->type_name->name, constant_tostring(trait->value));
 479         } else {
 480             fprintf(stderr, "Can't parse trait type %d\n", kind);
 481         }
 482         if(attributes&0x40) {
 483             int num = swf_GetU30(tag);
 484             int s;
 485             for(s=0;s<num;s++) {
 486                 swf_GetU30(tag); //index into metadata array
 487             }
 488         }
 489     }
 490     return traits;
 491 }
 492
 493 void traits_skip(TAG*tag)
 494 {
 495     int num_traits = swf_GetU30(tag);
 496     int t;
 497     for(t=0;t<num_traits;t++) {
 498         swf_GetU30(tag);
 499         U8 kind = swf_GetU8(tag);
 500         U8 attributes = kind&0xf0;
 501         kind&=0x0f;
 502         swf_GetU30(tag);
 503         swf_GetU30(tag);
 504         if(kind == TRAIT_SLOT || kind == TRAIT_CONST) {
 505             if(swf_GetU30(tag)) swf_GetU8(tag);
 506         } else if(kind>TRAIT_CONST) {
 507             fprintf(stderr, "Can't parse trait type %d\n", kind);
 508         }
 509         if(attributes&0x40) {
 510             int s, num = swf_GetU30(tag);
 511             for(s=0;s<num;s++) swf_GetU30(tag);
 512         }
 513     }
 514 }
 515
 516
 517 static void traits_write(pool_t*pool, TAG*tag, trait_list_t*traits)
 518 {
 519     if(!traits) {
 520         swf_SetU30(tag, 0);
 521         return;
 522     }
 523     swf_SetU30(tag, list_length(traits));
 524     int s;
 525
 526     while(traits) {
 527         trait_t*trait = traits->trait;
 528
 529         swf_SetU30(tag, pool_register_multiname(pool, trait->name));
 530         swf_SetU8(tag, trait->kind|trait->attributes);
 531
 532         swf_SetU30(tag, trait->data1);
 533
 534         if(trait->kind == TRAIT_CLASS) {
 535             swf_SetU30(tag, trait->cls->index);
 536         } else if(trait->kind == TRAIT_GETTER ||
 537                   trait->kind == TRAIT_SETTER ||
 538                   trait->kind == TRAIT_METHOD) {
 539             swf_SetU30(tag, trait->method->index);
 540         } else if(trait->kind == TRAIT_SLOT ||
 541                   trait->kind == TRAIT_CONST) {
 542             int index = pool_register_multiname(pool, trait->type_name);
 543             swf_SetU30(tag, index);
 544         } else  {
 545             swf_SetU30(tag, trait->data2);
 546         }
 547
 548         if(trait->kind == TRAIT_SLOT || trait->kind == TRAIT_CONST) {
 549             int vindex = constant_get_index(pool, trait->value);
 550             swf_SetU30(tag, vindex);
 551             if(vindex) {
 552                 swf_SetU8(tag, trait->value->type);
 553             }
 554         }
 555         if(trait->attributes&0x40) {
 556             // metadata
 557             swf_SetU30(tag, 0);
 558         }
 559         traits = traits->next;
 560     }
 561 }
 562
 563
 564 static void traits_dump(FILE*fo, const char*prefix, trait_list_t*traits, abc_file_t*file, dict_t*methods_seen)
 565 {
 566     int t;
 567     while(traits) {
 568         trait_t*trait = traits->trait;
 569         char*name = multiname_tostring(trait->name);
 570         U8 kind = trait->kind;
 571         U8 attributes = trait->attributes;
 572
 573         char a = attributes & (TRAIT_ATTR_OVERRIDE|TRAIT_ATTR_FINAL);
 574         char* type = "";
 575         if(a==TRAIT_ATTR_FINAL)
 576             type = "final ";
 577         else if(a==TRAIT_ATTR_OVERRIDE)
 578             type = "override ";
 579         else if(a==(TRAIT_ATTR_OVERRIDE|TRAIT_ATTR_FINAL))
 580             type = "final override ";
 581
 582         if(attributes&TRAIT_ATTR_METADATA)
 583             fprintf(fo, "<metadata>");
 584
 585         if(kind == TRAIT_METHOD) {
 586             abc_method_t*m = trait->method;
 587             dump_method(fo, prefix, type, "method", name, m, file, methods_seen);
 588         } else if(kind == TRAIT_GETTER) {
 589             abc_method_t*m = trait->method;
 590             dump_method(fo, prefix, type, "getter", name, m, file, methods_seen);
 591         } else if(kind == TRAIT_SETTER) {
 592             abc_method_t*m = trait->method;
 593             dump_method(fo, prefix, type, "setter", name, m, file, methods_seen);
 594         } else if(kind == TRAIT_FUNCTION) { // function
 595             abc_method_t*m = trait->method;
 596             dump_method(fo, prefix, type, "function", name, m, file, methods_seen);
 597         } else if(kind == TRAIT_CLASS) { // class
 598             abc_class_t*cls = trait->cls;
 599             if(!cls) {
 600                 fprintf(fo, "%sslot %d: class %s=00000000\n", prefix, trait->slot_id, name);
 601             } else {
 602                 fprintf(fo, "%sslot %d: class %s=%s\n", prefix, trait->slot_id, name, cls->classname->name);
 603             }
 604         } else if(kind == TRAIT_SLOT || kind == TRAIT_CONST) { // slot, const
 605             int slot_id = trait->slot_id;
 606             char*type_name = multiname_tostring(trait->type_name);
 607             char*value = constant_tostring(trait->value);
 608             fprintf(fo, "%sslot %d: %s %s:%s %s %s\n", prefix, trait->slot_id,
 609                     kind==TRAIT_CONST?"const":"var", name, type_name,
 610                     trait->value?"=":"", trait->value?value:"");
 611             if(value) free(value);
 612             free(type_name);
 613         } else {
 614             fprintf(fo, "%s    can't dump trait type %d\n", prefix, kind);
 615         }
 616         free(name);
 617         traits=traits->next;
 618     }
 619 }
 620
 621 void* swf_DumpABC(FILE*fo, void*code, char*prefix)
 622 {
 623     abc_file_t* file = (abc_file_t*)code;
 624
 625     if(file->name) {
 626         fprintf(fo, "%s#\n", prefix);
 627         fprintf(fo, "%s#name: %s\n", prefix, file->name);
 628         fprintf(fo, "%s#\n", prefix);
 629     }
 630
 631     int t;
 632     for(t=0;t<file->metadata->num;t++) {
 633         const char*entry_name = array_getkey(file->metadata, t);
 634         fprintf(fo, "%s#Metadata \"%s\":\n", prefix, entry_name);
 635         int s;
 636         array_t*items = (array_t*)array_getvalue(file->metadata, t);
 637         for(s=0;s<items->num;s++) {
 638             fprintf(fo, "%s#  %s=%s\n", prefix, (char*)array_getkey(items, s), (char*)array_getvalue(items,s));
 639         }
 640         fprintf(fo, "%s#\n", prefix);
 641     }
 642
 643     dict_t*methods_seen = dict_new2(&ptr_type);
 644     for(t=0;t<file->classes->num;t++) {
 645         abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
 646         char prefix2[80];
 647         sprintf(prefix2, "%s    ", prefix);
 648
 649         fprintf(fo, "%s", prefix);
 650         if(cls->flags&1) fprintf(fo, "sealed ");
 651         if(cls->flags&2) fprintf(fo, "final ");
 652         if(cls->flags&4) fprintf(fo, "interface ");
 653         if(cls->flags&8) {
 654             char*s = namespace_tostring(cls->protectedNS);
 655             fprintf(fo, "protectedNS(%s) ", s);
 656             free(s);
 657         }
 658
 659         char*classname = multiname_tostring(cls->classname);
 660         fprintf(fo, "class %s", classname);
 661         free(classname);
 662         if(cls->superclass) {
 663             char*supername = multiname_tostring(cls->superclass);
 664             fprintf(fo, " extends %s", supername);
 665             free(supername);
 666         }
 667         if(cls->interfaces) {
 668             multiname_list_t*ilist = cls->interfaces;
 669             if(ilist)
 670                 fprintf(fo, " implements");
 671             while(ilist) {
 672                 char*s = multiname_tostring(ilist->multiname);
 673                 fprintf(fo, " %s", s);
 674                 free(s);
 675                 ilist = ilist->next;
 676             }
 677             ilist->next;
 678         }
 679         if(cls->flags&0xf0)
 680             fprintf(fo, "extra flags=%02x\n", cls->flags&0xf0);
 681         fprintf(fo, "%s{\n", prefix);
 682
 683         dict_put(methods_seen, cls->static_constructor, 0);
 684         dict_put(methods_seen, cls->constructor, 0);
 685
 686         if(cls->static_constructor) {
 687             dump_method(fo, prefix2, "", "staticconstructor", "", cls->static_constructor, file, methods_seen);
 688         }
 689         traits_dump(fo, prefix2, cls->static_traits, file, methods_seen);
 690
 691         char*n = multiname_tostring(cls->classname);
 692         if(cls->constructor)
 693             dump_method(fo, prefix2, "", "constructor", n, cls->constructor, file, methods_seen);
 694         free(n);
 695         traits_dump(fo, prefix2,cls->traits, file, methods_seen);
 696
 697         if(cls->asset) {
 698             swf_DumpAsset(fo, cls->asset, prefix2);
 699         }
 700
 701         fprintf(fo, "%s}\n", prefix);
 702     }
 703     fprintf(fo, "%s\n", prefix);
 704
 705     for(t=0;t<file->scripts->num;t++) {
 706         abc_script_t*s = (abc_script_t*)array_getvalue(file->scripts, t);
 707         dump_method(fo, prefix, "", "initmethod", "init", s->method, file, methods_seen);
 708         traits_dump(fo, prefix, s->traits, file, methods_seen);
 709     }
 710
 711     char extra=0;
 712     for(t=0;t<file->methods->num;t++) {
 713         abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, t);
 714         if(!dict_contains(methods_seen, m)) {
 715             if(!extra) {
 716                 extra=1;
 717                 fprintf(fo, "\n");
 718                 fprintf(fo, "%s//internal (non-class non-script) methods:\n", prefix);
 719             }
 720             char name[18];
 721             sprintf(name, "%08x ", m->index);
 722             dump_method(fo, prefix, "", "internalmethod", name, m, file, methods_seen);
 723         }
 724     }
 725     dict_destroy(methods_seen);
 726
 727     return file;
 728 }
 729
 730 void* swf_ReadABC(TAG*tag)
 731 {
 732     abc_file_t* file = abc_file_new();
 733     pool_t*pool = pool_new();
 734
 735     swf_SetTagPos(tag, 0);
 736     int t;
 737     if(tag->id == ST_DOABC) {
 738         U32 abcflags = swf_GetU32(tag);
 739         DEBUG printf("flags=%08x\n", abcflags);
 740         char*name= swf_GetString(tag);
 741         file->name = (name&&name[0])?strdup(name):0;
 742     }
 743     U32 version = swf_GetU32(tag);
 744     if(version!=0x002e0010) {
 745         fprintf(stderr, "Warning: unknown AVM2 version %08x\n", version);
 746     }
 747
 748     pool_read(pool, tag);
 749
 750     int num_methods = swf_GetU30(tag);
 751     DEBUG printf("%d methods\n", num_methods);
 752     for(t=0;t<num_methods;t++) {
 753         NEW(abc_method_t,m);
 754         int param_count = swf_GetU30(tag);
 755         int return_type_index = swf_GetU30(tag);
 756         if(return_type_index)
 757             m->return_type = multiname_clone(pool_lookup_multiname(pool, return_type_index));
 758         else
 759             m->return_type = 0;
 760
 761         int s;
 762         for(s=0;s<param_count;s++) {
 763             int type_index = swf_GetU30(tag);
 764
 765             /* type_index might be 0 ("*") */
 766             multiname_t*param = type_index?multiname_clone(pool_lookup_multiname(pool, type_index)):0;
 767             list_append(m->parameters, param);
 768         }
 769
 770         int namenr = swf_GetU30(tag);
 771         if(namenr)
 772             m->name = strdup(pool_lookup_string(pool, namenr));
 773         else
 774             m->name = strdup("");
 775
 776         m->flags = swf_GetU8(tag);
 777
 778         DEBUG printf("method %d) %s ", t, m->name);
 779         DEBUG params_dump(stdout, m->parameters, m->optional_parameters);
 780         DEBUG printf("flags=%02x\n", t, m->flags);
 781
 782         if(m->flags&0x08) {
 783             m->optional_parameters = list_new();
 784             int num = swf_GetU30(tag);
 785             int s;
 786             for(s=0;s<num;s++) {
 787                 int vindex = swf_GetU30(tag);
 788                 U8 vkind = swf_GetU8(tag); // specifies index type for "val"
 789                 constant_t*c = constant_fromindex(pool, vindex, vkind);
 790                 list_append(m->optional_parameters, c);
 791
 792             }
 793         }
 794         if(m->flags&0x80) {
 795             /* debug information- not used by avm2 */
 796             multiname_list_t*l = m->parameters;
 797             while(l) {
 798                 const char*name = pool_lookup_string(pool, swf_GetU30(tag));
 799                 l = l->next;
 800             }
 801         }
 802         m->index = array_length(file->methods);
 803         array_append(file->methods, NO_KEY, m);
 804     }
 805
 806     parse_metadata(tag, file, pool);
 807
 808     /* skip classes, and scripts for now, and do the real parsing later */
 809     int num_classes = swf_GetU30(tag);
 810     int classes_pos = tag->pos;
 811     DEBUG printf("%d classes\n", num_classes);
 812     for(t=0;t<num_classes;t++) {
 813         abc_class_t*cls = malloc(sizeof(abc_class_t));
 814         memset(cls, 0, sizeof(abc_class_t));
 815
 816         swf_GetU30(tag); //classname
 817         swf_GetU30(tag); //supername
 818
 819         array_append(file->classes, NO_KEY, cls);
 820
 821         cls->flags = swf_GetU8(tag);
 822         DEBUG printf("class %d %02x\n", t, cls->flags);
 823         if(cls->flags&8)
 824             swf_GetU30(tag); //protectedNS
 825         int s;
 826         int inum = swf_GetU30(tag); //interface count
 827         cls->interfaces = 0;
 828         for(s=0;s<inum;s++) {
 829             int interface_index = swf_GetU30(tag);
 830             multiname_t* m = multiname_clone(pool_lookup_multiname(pool, interface_index));
 831             list_append(cls->interfaces, m);
 832             DEBUG printf("  class %d interface: %s\n", t, m->name);
 833         }
 834
 835         int iinit = swf_GetU30(tag); //iinit
 836         DEBUG printf("--iinit-->%d\n", iinit);
 837         traits_skip(tag);
 838     }
 839     for(t=0;t<num_classes;t++) {
 840         abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
 841         int cinit = swf_GetU30(tag);
 842         DEBUG printf("--cinit(%d)-->%d\n", t, cinit);
 843         cls->static_constructor = (abc_method_t*)array_getvalue(file->methods, cinit);
 844         traits_skip(tag);
 845     }
 846     int num_scripts = swf_GetU30(tag);
 847     DEBUG printf("%d scripts\n", num_scripts);
 848     for(t=0;t<num_scripts;t++) {
 849         int init = swf_GetU30(tag);
 850         traits_skip(tag);
 851     }
 852
 853     int num_method_bodies = swf_GetU30(tag);
 854     DEBUG printf("%d method bodies\n", num_method_bodies);
 855     for(t=0;t<num_method_bodies;t++) {
 856         int methodnr = swf_GetU30(tag);
 857         if(methodnr >= file->methods->num) {
 858             printf("Invalid method number: %d\n", methodnr);
 859             return 0;
 860         }
 861         abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, methodnr);
 862         abc_method_body_t*c = malloc(sizeof(abc_method_body_t));
 863         memset(c, 0, sizeof(abc_method_body_t));
 864         c->old.max_stack = swf_GetU30(tag);
 865         c->old.local_count = swf_GetU30(tag);
 866         c->old.init_scope_depth = swf_GetU30(tag);
 867         c->old.max_scope_depth = swf_GetU30(tag);
 868
 869         c->init_scope_depth = c->old.init_scope_depth;
 870         int code_length = swf_GetU30(tag);
 871
 872         c->method = m;
 873         m->body = c;
 874
 875         int pos = tag->pos + code_length;
 876         codelookup_t*codelookup = 0;
 877         c->code = code_parse(tag, code_length, file, pool, &codelookup);
 878         tag->pos = pos;
 879
 880         int exception_count = swf_GetU30(tag);
 881         int s;
 882         c->exceptions = list_new();
 883         for(s=0;s<exception_count;s++) {
 884             abc_exception_t*e = malloc(sizeof(abc_exception_t));
 885
 886             e->from = code_atposition(codelookup, swf_GetU30(tag));
 887             e->to = code_atposition(codelookup, swf_GetU30(tag));
 888             e->target = code_atposition(codelookup, swf_GetU30(tag));
 889
 890             e->exc_type = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
 891             e->var_name = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
 892             //e->var_name = pool_lookup_string(pool, swf_GetU30(tag));
 893             //if(e->var_name) e->var_name = strdup(e->var_name);
 894             list_append(c->exceptions, e);
 895         }
 896         codelookup_free(codelookup);
 897         c->traits = traits_parse(tag, pool, file);
 898
 899         DEBUG printf("method_body %d) (method %d), %d bytes of code\n", t, methodnr, code_length);
 900
 901         array_append(file->method_bodies, NO_KEY, c);
 902     }
 903     if(tag->len - tag->pos) {
 904         fprintf(stderr, "ERROR: %d unparsed bytes remaining in ABC block\n", tag->len - tag->pos);
 905         return 0;
 906     }
 907
 908     swf_SetTagPos(tag, classes_pos);
 909     for(t=0;t<num_classes;t++) {
 910         abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
 911
 912         int classname_index = swf_GetU30(tag);
 913         int superclass_index = swf_GetU30(tag);
 914         cls->classname = multiname_clone(pool_lookup_multiname(pool, classname_index));
 915         cls->superclass = multiname_clone(pool_lookup_multiname(pool, superclass_index));
 916         cls->flags = swf_GetU8(tag);
 917         const char*ns = "";
 918         if(cls->flags&8) {
 919             int ns_index = swf_GetU30(tag);
 920             cls->protectedNS = namespace_clone(pool_lookup_namespace(pool, ns_index));
 921         }
 922
 923         int num_interfaces = swf_GetU30(tag); //interface count
 924         int s;
 925         for(s=0;s<num_interfaces;s++) {
 926             swf_GetU30(tag);
 927         }
 928         int iinit = swf_GetU30(tag);
 929         cls->constructor = (abc_method_t*)array_getvalue(file->methods, iinit);
 930         cls->traits = traits_parse(tag, pool, file);
 931     }
 932     for(t=0;t<num_classes;t++) {
 933         abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
 934         /* SKIP */
 935         swf_GetU30(tag); // cindex
 936         cls->static_traits = traits_parse(tag, pool, file);
 937     }
 938     int num_scripts2 = swf_GetU30(tag);
 939     for(t=0;t<num_scripts2;t++) {
 940         int init = swf_GetU30(tag);
 941         abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, init);
 942
 943         abc_script_t*s = malloc(sizeof(abc_script_t));
 944         memset(s, 0, sizeof(abc_script_t));
 945         s->method = m;
 946         s->traits = traits_parse(tag, pool, file);
 947         array_append(file->scripts, NO_KEY, s);
 948     }
 949
 950     pool_destroy(pool);
 951     return file;
 952 }
 953
 954 static pool_t*writeABC(TAG*abctag, void*code, pool_t*pool)
 955 {
 956     abc_file_t*file = (abc_file_t*)code;
 957     if(!pool)
 958         pool = pool_new();
 959     if(!file)
 960         file = abc_file_new();
 961
 962     TAG*tmp = swf_InsertTag(0,0);
 963     TAG*tag = tmp;
 964     int t;
 965
 966     /* add method bodies where needed */
 967     for(t=0;t<file->classes->num;t++) {
 968         abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
 969         if(!c->constructor) {
 970             if(!(c->flags&CLASS_INTERFACE)) {
 971                 NEW(abc_method_t,m);array_append(file->methods, NO_KEY, m);
 972                 NEW(abc_method_body_t,body);array_append(file->method_bodies, NO_KEY, body);
 973                 // don't bother to set m->index
 974                 body->method = m; m->body = body;
 975                 if(c->superclass && c->superclass->name && strcmp(c->superclass->name,"Object")) {
 976                     body->code = abc_getlocal_0(body->code);
 977                     body->code = abc_constructsuper(body->code, 0);
 978                 }
 979                 body->code = abc_returnvoid(body->code);
 980                 c->constructor = m;
 981             } else {
 982                 NEW(abc_method_t,m);array_append(file->methods, NO_KEY, m);
 983                 c->constructor = m;
 984             }
 985         }
 986         if(!c->static_constructor) {
 987             NEW(abc_method_t,m);array_append(file->methods, NO_KEY, m);
 988             NEW(abc_method_body_t,body);array_append(file->method_bodies, NO_KEY, body);
 989             body->method = m; m->body = body;
 990             body->code = abc_returnvoid(0);
 991             c->static_constructor = m;
 992         }
 993     }
 994
 995
 996     swf_SetU30(tag, file->methods->num);
 997     /* enumerate classes, methods and method bodies */
 998     for(t=0;t<file->methods->num;t++) {
 999         abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, t);
1000         m->index = t;
1001     }
1002     for(t=0;t<file->classes->num;t++) {
1003         abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
1004         c->index = t;
1005     }
1006     for(t=0;t<file->method_bodies->num;t++) {
1007         abc_method_body_t*m = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1008         m->index = t;
1009     }
1010
1011     /* generate code statistics */
1012     for(t=0;t<file->method_bodies->num;t++) {
1013         abc_method_body_t*m = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1014         m->stats = code_get_statistics(m->code, m->exceptions);
1015     }
1016
1017     /* level init scope depths: The init scope depth of a method is
1018        always as least as high as the init scope depth of it's surrounding
1019        class.
1020        A method has it's own init_scope_depth if it's an init method
1021        (then its init scope depth is zero), or if it's used as a closure.
1022
1023        Not sure yet what to do with methods which are used at different
1024        locations- e.g. the nullmethod is used all over the place.
1025        EDIT: flashplayer doesn't allow this anyway- a method can only
1026              be used once
1027
1028        Also, I have the strong suspicion that flash player uses only
1029        the difference between max_scope_stack and init_scope_stack, anyway.
1030      */
1031     for(t=0;t<file->classes->num;t++) {
1032         abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
1033         trait_list_t*traits = c->traits;
1034         if(c->constructor && c->constructor->body &&
1035            c->constructor->body->init_scope_depth < c->init_scope_depth) {
1036            c->constructor->body->init_scope_depth = c->init_scope_depth;
1037         }
1038         if(c->static_constructor && c->static_constructor->body &&
1039            c->static_constructor->body->init_scope_depth < c->init_scope_depth) {
1040            c->static_constructor->body->init_scope_depth = c->init_scope_depth;
1041         }
1042         while(traits) {
1043             trait_t*trait = traits->trait;
1044             if(trait_is_method(trait) && trait->method->body) {
1045                 abc_method_body_t*body = trait->method->body;
1046                 if(body->init_scope_depth < c->init_scope_depth) {
1047                    body->init_scope_depth = c->init_scope_depth;
1048                 }
1049             }
1050             traits = traits->next;
1051         }
1052     }
1053
1054     for(t=0;t<file->methods->num;t++) {
1055         abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, t);
1056         int n = 0;
1057         multiname_list_t*l = m->parameters;
1058         int num_params = list_length(m->parameters);
1059         swf_SetU30(tag, num_params);
1060         if(m->return_type)
1061             swf_SetU30(tag, pool_register_multiname(pool, m->return_type));
1062         else
1063             swf_SetU30(tag, 0);
1064         int s;
1065         while(l) {
1066             swf_SetU30(tag, pool_register_multiname(pool, l->multiname));
1067             l = l->next;
1068         }
1069         if(m->name) {
1070             swf_SetU30(tag, pool_register_string(pool, m->name));
1071         } else {
1072             swf_SetU30(tag, 0);
1073         }
1074
1075         U8 flags = m->flags&(METHOD_NEED_REST|METHOD_NEED_ARGUMENTS);
1076         if(m->optional_parameters)
1077             flags |= METHOD_HAS_OPTIONAL;
1078         if(m->body) {
1079             flags |= m->body->stats->flags;
1080         }
1081
1082         swf_SetU8(tag, flags);
1083         if(flags&METHOD_HAS_OPTIONAL) {
1084             swf_SetU30(tag, list_length(m->optional_parameters));
1085             constant_list_t*l = m->optional_parameters;
1086             while(l) {
1087                 int i = constant_get_index(pool, l->constant);
1088                 swf_SetU30(tag, i);
1089                 if(!i) {
1090                     swf_SetU8(tag, CONSTANT_NULL);
1091                 } else {
1092                     swf_SetU8(tag, l->constant->type);
1093                 }
1094                 l = l->next;
1095             }
1096         }
1097     }
1098
1099     /* write metadata */
1100     swf_SetU30(tag, file->metadata->num);
1101     for(t=0;t<file->metadata->num;t++) {
1102         const char*entry_name = array_getkey(file->metadata, t);
1103         swf_SetU30(tag, pool_register_string(pool, entry_name));
1104         array_t*items = (array_t*)array_getvalue(file->metadata, t);
1105         swf_SetU30(tag, items->num);
1106         int s;
1107         for(s=0;s<items->num;s++) {
1108             int i1 = pool_register_string(pool, array_getkey(items, s));
1109             int i2 = pool_register_string(pool, array_getvalue(items, s));
1110             swf_SetU30(tag, i1);
1111             swf_SetU30(tag, i2);
1112         }
1113     }
1114
1115     swf_SetU30(tag, file->classes->num);
1116     for(t=0;t<file->classes->num;t++) {
1117         abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
1118
1119         int classname_index = pool_register_multiname(pool, c->classname);
1120         int superclass_index = pool_register_multiname(pool, c->superclass);
1121
1122         swf_SetU30(tag, classname_index);
1123         swf_SetU30(tag, superclass_index);
1124
1125         swf_SetU8(tag, c->flags); // flags
1126         if(c->flags&0x08) {
1127             int ns_index = pool_register_namespace(pool, c->protectedNS);
1128             swf_SetU30(tag, ns_index);
1129         }
1130
1131         swf_SetU30(tag, list_length(c->interfaces));
1132         multiname_list_t*interface= c->interfaces;
1133         while(interface) {
1134             swf_SetU30(tag, pool_register_multiname(pool, interface->multiname));
1135             interface = interface->next;
1136         }
1137
1138         assert(c->constructor);
1139         swf_SetU30(tag, c->constructor->index);
1140
1141         traits_write(pool, tag, c->traits);
1142     }
1143     for(t=0;t<file->classes->num;t++) {
1144         abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
1145         assert(c->static_constructor);
1146         swf_SetU30(tag, c->static_constructor->index);
1147
1148         traits_write(pool, tag, c->static_traits);
1149     }
1150
1151     swf_SetU30(tag, file->scripts->num);
1152     for(t=0;t<file->scripts->num;t++) {
1153         abc_script_t*s = (abc_script_t*)array_getvalue(file->scripts, t);
1154         if(!s->method->body || !s->method->body->code) {
1155             fprintf(stderr, "Internal Error: initscript has no body\n");
1156         }
1157         swf_SetU30(tag, s->method->index); //!=t!
1158         traits_write(pool, tag, s->traits);
1159     }
1160
1161     swf_SetU30(tag, file->method_bodies->num);
1162     for(t=0;t<file->method_bodies->num;t++) {
1163         abc_method_body_t*c = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1164         abc_method_t*m = c->method;
1165         swf_SetU30(tag, m->index);
1166
1167         //swf_SetU30(tag, c->old.max_stack);
1168         //swf_SetU30(tag, c->old.local_count);
1169         //swf_SetU30(tag, c->old.init_scope_depth);
1170         //swf_SetU30(tag, c->old.max_scope_depth);
1171
1172         swf_SetU30(tag, c->stats->max_stack);
1173         int param_num = list_length(c->method->parameters)+1;
1174         if(c->method->flags&METHOD_NEED_REST)
1175             param_num++;
1176         if(param_num <= c->stats->local_count)
1177             swf_SetU30(tag, c->stats->local_count);
1178         else
1179             swf_SetU30(tag, param_num);
1180
1181         swf_SetU30(tag, c->init_scope_depth);
1182         swf_SetU30(tag, c->stats->max_scope_depth+
1183                         c->init_scope_depth);
1184
1185         code_write(tag, c->code, pool, file);
1186
1187         swf_SetU30(tag, list_length(c->exceptions));
1188         abc_exception_list_t*l = c->exceptions;
1189         while(l) {
1190             // warning: assumes "pos" in each code_t is up-to-date
1191             swf_SetU30(tag, l->abc_exception->from->pos);
1192             swf_SetU30(tag, l->abc_exception->to->pos);
1193             swf_SetU30(tag, l->abc_exception->target->pos);
1194             swf_SetU30(tag, pool_register_multiname(pool, l->abc_exception->exc_type));
1195             swf_SetU30(tag, pool_register_multiname(pool, l->abc_exception->var_name));
1196             l = l->next;
1197         }
1198
1199         traits_write(pool, tag, c->traits);
1200     }
1201
1202     /* free temporary codestat data again. Notice: If we were to write this
1203        file multiple times, this can also be shifted to abc_file_free() */
1204     for(t=0;t<file->method_bodies->num;t++) {
1205         abc_method_body_t*m = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1206         codestats_free(m->stats);m->stats=0;
1207     }
1208
1209     // --- start to write real tag --
1210
1211     tag = abctag;
1212
1213     if(tag->id == ST_DOABC) {
1214         swf_SetU32(tag, file->flags); // flags
1215         swf_SetString(tag, file->name);
1216     }
1217
1218     swf_SetU16(tag, 0x10); //version
1219     swf_SetU16(tag, 0x2e);
1220
1221     pool_write(pool, tag);
1222
1223     swf_SetBlock(tag, tmp->data, tmp->len);
1224
1225     swf_DeleteTag(0, tmp);
1226     return pool;
1227 }
1228
1229 void swf_WriteABC(TAG*abctag, void*code)
1230 {
1231     pool_t*pool = writeABC(abctag, code, 0);
1232     pool_optimize(pool);
1233     swf_ResetTag(abctag, abctag->id);
1234     writeABC(abctag, code, pool);
1235     pool_destroy(pool);
1236 }
1237
1238 void abc_file_free(abc_file_t*file)
1239 {
1240     if(!file)
1241         return;
1242     int t;
1243     if(file->metadata) {
1244         for(t=0;t<file->metadata->num;t++) {
1245             array_t*items = (array_t*)array_getvalue(file->metadata, t);
1246             int s;
1247             for(s=0;s<items->num;s++) {
1248                 free(array_getvalue(items, s));
1249             }
1250             array_free(items);
1251         }
1252         array_free(file->metadata);file->metadata=0;
1253     }
1254
1255     for(t=0;t<file->methods->num;t++) {
1256         abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, t);
1257
1258         multiname_list_t*param = m->parameters;
1259         while(param) {
1260             multiname_destroy(param->multiname);param->multiname=0;
1261             param = param->next;
1262         }
1263         list_free(m->parameters);m->parameters=0;
1264
1265         constant_list_t*opt = m->optional_parameters;
1266         while(opt) {
1267             constant_free(opt->constant);opt->constant=0;
1268             opt = opt->next;
1269         }
1270         list_free(m->optional_parameters);m->optional_parameters=0;
1271
1272         if(m->name) {
1273             free((void*)m->name);m->name=0;
1274         }
1275         if(m->return_type) {
1276             multiname_destroy(m->return_type);
1277         }
1278         free(m);
1279     }
1280     array_free(file->methods);file->methods=0;
1281
1282     for(t=0;t<file->classes->num;t++) {
1283         abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
1284         traits_free(cls->traits);cls->traits=0;
1285         traits_free(cls->static_traits);cls->static_traits=0;
1286
1287         if(cls->classname) {
1288             multiname_destroy(cls->classname);
1289         }
1290         if(cls->superclass) {
1291             multiname_destroy(cls->superclass);
1292         }
1293
1294         multiname_list_t*i = cls->interfaces;
1295         while(i) {
1296             multiname_destroy(i->multiname);i->multiname=0;
1297             i = i->next;
1298         }
1299         list_free(cls->interfaces);cls->interfaces=0;
1300
1301         if(cls->protectedNS) {
1302             namespace_destroy(cls->protectedNS);
1303         }
1304         free(cls);
1305     }
1306     array_free(file->classes);file->classes=0;
1307
1308     for(t=0;t<file->scripts->num;t++) {
1309         abc_script_t*s = (abc_script_t*)array_getvalue(file->scripts, t);
1310         traits_free(s->traits);s->traits=0;
1311         free(s);
1312     }
1313     array_free(file->scripts);file->scripts=0;
1314
1315     for(t=0;t<file->method_bodies->num;t++) {
1316         abc_method_body_t*body = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1317         code_free(body->code);body->code=0;
1318         traits_free(body->traits);body->traits=0;
1319
1320         abc_exception_list_t*ee = body->exceptions;
1321         while(ee) {
1322             abc_exception_t*e=ee->abc_exception;ee->abc_exception=0;
1323             e->from = e->to = e->target = 0;
1324             multiname_destroy(e->exc_type);e->exc_type=0;
1325             multiname_destroy(e->var_name);e->var_name=0;
1326             free(e);
1327             ee=ee->next;
1328         }
1329         list_free(body->exceptions);body->exceptions=0;
1330
1331         free(body);
1332     }
1333     array_free(file->method_bodies);file->method_bodies=0;
1334
1335     if(file->name) {
1336         free((void*)file->name);file->name=0;
1337     }
1338
1339     free(file);
1340 }
1341
1342 void swf_FreeABC(void*code)
1343 {
1344     abc_file_t*file= (abc_file_t*)code;
1345     abc_file_free(file);
1346 }
1347