3 Routines for handling Flash2 AVM2 ABC Actionscript
5 Extension module for the rfxswf library.
6 Part of the swftools package.
8 Copyright (c) 2008 Matthias Kramm <kramm@quiss.org>
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.
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.
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 */
26 #include "../rfxswf.h"
30 char stringbuffer[2048];
32 int abc_RegisterNameSpace(abc_file_t*file, const char*name);
33 int abc_RegisterPackageNameSpace(abc_file_t*file, const char*name);
34 int abc_RegisterPackageInternalNameSpace(abc_file_t*file, const char*name);
35 int abc_RegisterProtectedNameSpace(abc_file_t*file, const char*name);
36 int abc_RegisterExplicitNameSpace(abc_file_t*file, const char*name);
37 int abc_RegisterStaticProtectedNameSpace(abc_file_t*file, const char*name);
38 int abc_RegisterPrivateNameSpace(abc_file_t*file, const char*name);
40 /* TODO: switch to a datastructure with just values */
43 static char* params_tostring(multiname_list_t*list)
46 int n = list_length(list);
47 char**names = (char**)malloc(sizeof(char*)*n);
53 names[n] = multiname_tostring(l->multiname);
54 size += strlen(names[n]) + 2;
58 char* params = malloc(size+15);
67 strcat(params, names[n]);
75 sprintf(num, "[%d params]", n);
76 strcat(params, num);*/
85 static void parse_metadata(TAG*tag, abc_file_t*file, pool_t*pool)
88 int num_metadata = swf_GetU30(tag);
90 DEBUG printf("%d metadata\n");
91 for(t=0;t<num_metadata;t++) {
92 const char*entry_name = pool_lookup_string(pool, swf_GetU30(tag));
93 int num = swf_GetU30(tag);
95 DEBUG printf(" %s\n", entry_name);
96 array_t*items = array_new();
98 int i1 = swf_GetU30(tag);
99 int i2 = swf_GetU30(tag);
100 const char*key = i1?pool_lookup_string(pool, i1):"";
101 const char*value = i2?pool_lookup_string(pool, i2):"";
102 DEBUG printf(" %s=%s\n", key, value);
103 array_append(items, key, strdup(value));
105 array_append(file->metadata, entry_name, items);
109 void swf_CopyData(TAG*to, TAG*from, int len)
111 unsigned char*data = malloc(len);
112 swf_GetBlock(from, data, len);
113 swf_SetBlock(to, data, len);
117 abc_file_t*abc_file_new()
119 abc_file_t*f = malloc(sizeof(abc_file_t));
120 memset(f, 0, sizeof(abc_file_t));
121 f->metadata = array_new();
123 f->methods = array_new();
124 f->classes = array_new();
125 f->scripts = array_new();
126 f->method_bodies = array_new();
127 f->flags = ABCFILE_LAZY;
132 abc_class_t* abc_class_new(abc_file_t*file, multiname_t*classname, multiname_t*superclass) {
135 array_append(file->classes, NO_KEY, c);
138 c->classname = multiname_clone(classname);
139 c->superclass = multiname_clone(superclass);
142 c->static_constructor = 0;
143 c->traits = list_new();
146 abc_class_t* abc_class_new2(abc_file_t*pool, char*classname, char*superclass)
148 return abc_class_new(pool, multiname_fromstring(classname), multiname_fromstring(superclass));
151 void abc_class_sealed(abc_class_t*c)
153 c->flags |= CLASS_SEALED;
155 void abc_class_final(abc_class_t*c)
157 c->flags |= CLASS_FINAL;
159 void abc_class_interface(abc_class_t*c)
161 c->flags |= CLASS_INTERFACE;
163 void abc_class_protectedNS(abc_class_t*c, char*namespace)
165 c->protectedNS = namespace_new_protected(namespace);
166 c->flags |= CLASS_PROTECTED_NS;
168 void abc_class_add_interface(abc_class_t*c, multiname_t*interface)
170 list_append(c->interfaces, multiname_clone(interface));
173 static abc_method_t* add_method(abc_file_t*file, abc_class_t*cls, multiname_t*returntype, char body, int num_params, va_list va)
175 /* construct method object */
177 m->index = array_length(file->methods);
178 array_append(file->methods, NO_KEY, m);
179 m->return_type = returntype;
182 for(t=0;t<num_params;t++) {
183 const char*param = va_arg(va, const char*);
184 list_append(m->parameters, multiname_fromstring(param));
188 /* construct code (method body) object */
189 NEW(abc_method_body_t,c);
190 array_append(file->method_bodies, NO_KEY, c);
191 c->index = array_length(file->method_bodies);
193 c->traits = list_new();
196 /* crosslink the two objects */
204 abc_method_t* abc_class_constructor(abc_class_t*cls, multiname_t*returntype, int num_params, ...)
207 va_start(va, num_params);
208 abc_method_t* m = add_method(cls->file, cls, returntype, 1, num_params, va);
210 cls->constructor = m;
214 abc_method_t* abc_class_staticconstructor(abc_class_t*cls, multiname_t*returntype, int num_params, ...)
217 va_start(va, num_params);
218 abc_method_t* m = add_method(cls->file, cls, returntype, 1, num_params, va);
220 cls->static_constructor = m;
224 trait_t*trait_new(int type, multiname_t*name, int data1, int data2, constant_t*v)
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;
231 trait->data1 = data1;
232 trait->data2 = data2;
236 trait_t*trait_new_member(multiname_t*type, multiname_t*name,constant_t*v)
238 int kind = TRAIT_SLOT;
239 trait_t*trait = malloc(sizeof(trait_t));
240 memset(trait, 0, sizeof(trait_t));
241 trait->kind = kind&0x0f;
242 trait->attributes = kind&0xf0;
244 trait->type_name = type;
247 trait_t*trait_new_method(multiname_t*name, abc_method_t*m)
249 int type = TRAIT_METHOD;
250 trait_t*trait = malloc(sizeof(trait_t));
251 memset(trait, 0, sizeof(trait_t));
252 trait->kind = type&0x0f;
253 trait->attributes = type&0xf0;
259 abc_method_t* abc_class_method(abc_class_t*cls, multiname_t*returntype, char*name, int num_params, ...)
261 abc_file_t*file = cls->file;
263 va_start(va, num_params);
264 abc_method_t* m = add_method(cls->file, cls, returntype, !(cls->flags&CLASS_INTERFACE), num_params, va);
266 trait_t*t = trait_new_method(multiname_fromstring(name), m);
268 /* start assigning traits at position #1.
269 Weird things happen when assigning slot 0- slot 0 and 1 seem
271 t->slot_id = list_length(cls->traits)+1;
272 list_append(cls->traits, t);
276 trait_t* abc_class_slot(abc_class_t*cls, char*name, multiname_t*type)
278 abc_file_t*file = cls->file;
279 multiname_t*m_name = multiname_fromstring(name);
280 multiname_t*m_type = multiname_clone(type);
281 trait_t*t = trait_new_member(m_type, m_name, 0);
282 t->slot_id = list_length(cls->traits)+1;
283 list_append(cls->traits, t);
287 trait_t* abc_class_find_slotid(abc_class_t*cls, int slotid)
291 for(l=cls->traits;l;l=l->next) {
292 if(l->trait->slot_id==slotid) {
300 void abc_method_body_addClassTrait(abc_method_body_t*code, char*multiname, int slotid, abc_class_t*cls)
302 abc_file_t*file = code->file;
303 multiname_t*m = multiname_fromstring(multiname);
304 trait_t*trait = trait_new(TRAIT_CLASS, m, slotid, 0, 0);
306 list_append(code->traits, trait);
309 /* notice: traits of a method (body) belonging to an init script
310 and traits of the init script are *not* the same thing */
311 int abc_initscript_addClassTrait(abc_script_t*script, multiname_t*multiname, abc_class_t*cls)
313 abc_file_t*file = script->file;
314 multiname_t*m = multiname_clone(multiname);
315 int slotid = list_length(script->traits)+1;
316 trait_t*trait = trait_new(TRAIT_CLASS, m, slotid, 0, 0);
318 list_append(script->traits, trait);
322 abc_script_t* abc_initscript(abc_file_t*file, multiname_t*returntype, int num_params, ...)
325 va_start(va, num_params);
326 abc_method_t*m = add_method(file, 0, returntype, 1, num_params, va);
327 abc_script_t* s = malloc(sizeof(abc_script_t));
329 s->traits = list_new();
331 array_append(file->scripts, NO_KEY, s);
336 static void traits_dump(FILE*fo, const char*prefix, trait_list_t*traits, abc_file_t*file);
338 static void dump_method(FILE*fo, const char*prefix, const char*type, const char*name, abc_method_t*m, abc_file_t*file)
340 char*return_type = 0;
342 return_type = multiname_tostring(m->return_type);
344 return_type = strdup("void");
345 char*paramstr = params_tostring(m->parameters);
346 fprintf(fo, "%s%s %s %s=%s %s (%d params, %d optional)\n", prefix, type, return_type, name, m->name, paramstr,
347 list_length(m->parameters),
348 list_length(m->optional_parameters)
350 free(paramstr);paramstr=0;
351 free(return_type);return_type=0;
353 abc_method_body_t*c = m->body;
358 fprintf(fo, "%s[stack:%d locals:%d scope:%d-%d flags:",
359 prefix, c->old.max_stack, c->old.local_count, c->old.init_scope_depth,
360 c->old.max_scope_depth);
363 int flags = c->method->flags;
364 if(flags&METHOD_NEED_ARGUMENTS) {fprintf(fo, " need_arguments");flags&=~METHOD_NEED_ARGUMENTS;}
365 if(flags&METHOD_NEED_ACTIVATION) {fprintf(fo, " need_activation");flags&=~METHOD_NEED_ACTIVATION;}
366 if(flags&METHOD_NEED_REST) {fprintf(fo, " need_rest");flags&=~METHOD_NEED_REST;}
367 if(flags&METHOD_HAS_OPTIONAL) {fprintf(fo, " has_optional");flags&=~METHOD_HAS_OPTIONAL;}
368 if(flags&METHOD_SET_DXNS) {fprintf(fo, " set_dxns");flags&=~METHOD_SET_DXNS;}
369 if(flags&METHOD_HAS_PARAM_NAMES) {fprintf(fo, " has_param_names");flags&=~METHOD_HAS_PARAM_NAMES;}
370 if(flags) fprintf(fo, " %02x", flags);
374 fprintf(fo, " slot:%d", m->trait->slot_id);
380 sprintf(prefix2, "%s ", prefix);
382 traits_dump(fo, prefix, c->traits, file);
383 fprintf(fo, "%s{\n", prefix);
384 code_dump(c->code, c->exceptions, file, prefix2, fo);
385 fprintf(fo, "%s}\n\n", prefix);
388 static void traits_free(trait_list_t*traits)
390 trait_list_t*t = traits;
393 multiname_destroy(t->trait->name);t->trait->name = 0;
395 if(t->trait->kind == TRAIT_SLOT || t->trait->kind == TRAIT_CONST) {
396 multiname_destroy(t->trait->type_name);
398 if(t->trait->value) {
399 constant_free(t->trait->value);t->trait->value = 0;
401 free(t->trait);t->trait = 0;
407 static char trait_is_method(trait_t*trait)
409 return (trait->kind == TRAIT_METHOD || trait->kind == TRAIT_GETTER ||
410 trait->kind == TRAIT_SETTER || trait->kind == TRAIT_FUNCTION);
413 static trait_list_t* traits_parse(TAG*tag, pool_t*pool, abc_file_t*file)
415 int num_traits = swf_GetU30(tag);
416 trait_list_t*traits = list_new();
419 DEBUG printf("%d traits\n", num_traits);
422 for(t=0;t<num_traits;t++) {
424 list_append(traits, trait);
426 trait->name = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag))); // always a QName (ns,name)
429 DEBUG name = multiname_tostring(trait->name);
430 U8 kind = swf_GetU8(tag);
431 U8 attributes = kind&0xf0;
434 trait->attributes = attributes;
435 DEBUG printf(" trait %d) %s type=%02x\n", t, name, kind);
436 if(kind == TRAIT_METHOD || kind == TRAIT_GETTER || kind == TRAIT_SETTER) { // method / getter / setter
437 trait->disp_id = swf_GetU30(tag);
438 trait->method = (abc_method_t*)array_getvalue(file->methods, swf_GetU30(tag));
439 trait->method->trait = trait;
440 DEBUG printf(" method/getter/setter\n");
441 } else if(kind == TRAIT_FUNCTION) { // function
442 trait->slot_id = swf_GetU30(tag);
443 trait->method = (abc_method_t*)array_getvalue(file->methods, swf_GetU30(tag));
444 trait->method->trait = trait;
445 } else if(kind == TRAIT_CLASS) { // class
446 trait->slot_id = swf_GetU30(tag);
447 trait->cls = (abc_class_t*)array_getvalue(file->classes, swf_GetU30(tag));
448 DEBUG printf(" class %s %d %d\n", name, trait->slot_id, trait->cls);
449 } else if(kind == TRAIT_SLOT || kind == TRAIT_CONST) { // slot, const
450 /* a slot is a variable in a class that is shared amonst all instances
451 of the same type, but which has a unique location in each object
452 (in other words, slots are non-static, traits are static)
454 trait->slot_id = swf_GetU30(tag);
455 trait->type_name = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
456 int vindex = swf_GetU30(tag);
458 int vkind = swf_GetU8(tag);
459 trait->value = constant_fromindex(pool, vindex, vkind);
461 DEBUG printf(" slot %s %d %s (%s)\n", name, trait->slot_id, trait->type_name->name, constant_tostring(trait->value));
463 fprintf(stderr, "Can't parse trait type %d\n", kind);
465 if(attributes&0x40) {
466 int num = swf_GetU30(tag);
469 swf_GetU30(tag); //index into metadata array
476 void traits_skip(TAG*tag)
478 int num_traits = swf_GetU30(tag);
480 for(t=0;t<num_traits;t++) {
482 U8 kind = swf_GetU8(tag);
483 U8 attributes = kind&0xf0;
487 if(kind == TRAIT_SLOT || kind == TRAIT_CONST) {
488 if(swf_GetU30(tag)) swf_GetU8(tag);
489 } else if(kind>TRAIT_CONST) {
490 fprintf(stderr, "Can't parse trait type %d\n", kind);
492 if(attributes&0x40) {
493 int s, num = swf_GetU30(tag);
494 for(s=0;s<num;s++) swf_GetU30(tag);
500 static void traits_write(pool_t*pool, TAG*tag, trait_list_t*traits)
506 swf_SetU30(tag, list_length(traits));
510 trait_t*trait = traits->trait;
512 swf_SetU30(tag, pool_register_multiname(pool, trait->name));
513 swf_SetU8(tag, trait->kind|trait->attributes);
515 swf_SetU30(tag, trait->data1);
517 if(trait->kind == TRAIT_CLASS) {
518 swf_SetU30(tag, trait->cls->index);
519 } else if(trait->kind == TRAIT_GETTER ||
520 trait->kind == TRAIT_SETTER ||
521 trait->kind == TRAIT_METHOD) {
522 swf_SetU30(tag, trait->method->index);
523 } else if(trait->kind == TRAIT_SLOT ||
524 trait->kind == TRAIT_CONST) {
525 int index = pool_register_multiname(pool, trait->type_name);
526 swf_SetU30(tag, index);
528 swf_SetU30(tag, trait->data2);
531 if(trait->kind == TRAIT_SLOT || trait->kind == TRAIT_CONST) {
532 int vindex = constant_get_index(pool, trait->value);
533 swf_SetU30(tag, vindex);
535 swf_SetU8(tag, trait->value->type);
538 if(trait->attributes&0x40) {
542 traits = traits->next;
547 static void traits_dump(FILE*fo, const char*prefix, trait_list_t*traits, abc_file_t*file)
551 trait_t*trait = traits->trait;
552 char*name = multiname_tostring(trait->name);
553 U8 kind = trait->kind;
554 U8 attributes = trait->attributes;
555 if(kind == TRAIT_METHOD) {
556 abc_method_t*m = trait->method;
557 dump_method(fo, prefix, "method", name, m, file);
558 } else if(kind == TRAIT_GETTER) {
559 abc_method_t*m = trait->method;
560 dump_method(fo, prefix, "getter", name, m, file);
561 } else if(kind == TRAIT_SETTER) {
562 abc_method_t*m = trait->method;
563 dump_method(fo, prefix, "setter", name, m, file);
564 } else if(kind == TRAIT_FUNCTION) { // function
565 abc_method_t*m = trait->method;
566 dump_method(fo, prefix, "function", name, m, file);
567 } else if(kind == TRAIT_CLASS) { // class
568 abc_class_t*cls = trait->cls;
570 fprintf(fo, "%sslot %d: class %s=00000000\n", prefix, trait->slot_id, name);
572 fprintf(fo, "%sslot %d: class %s=%s\n", prefix, trait->slot_id, name, cls->classname->name);
574 } else if(kind == TRAIT_SLOT || kind == TRAIT_CONST) { // slot, const
575 int slot_id = trait->slot_id;
576 char*type_name = multiname_tostring(trait->type_name);
577 char*value = constant_tostring(trait->value);
578 fprintf(fo, "%sslot %d: %s%s %s %s %s\n", prefix, trait->slot_id,
579 kind==TRAIT_CONST?"const ":"", type_name, name,
580 value?"=":"", value);
581 if(value) free(value);
584 fprintf(fo, "%s can't dump trait type %d\n", prefix, kind);
591 void* swf_DumpABC(FILE*fo, void*code, char*prefix)
593 abc_file_t* file = (abc_file_t*)code;
596 fprintf(fo, "%s#\n", prefix);
597 fprintf(fo, "%s#name: %s\n", prefix, file->name);
598 fprintf(fo, "%s#\n", prefix);
602 for(t=0;t<file->metadata->num;t++) {
603 const char*entry_name = array_getkey(file->metadata, t);
604 fprintf(fo, "%s#Metadata \"%s\":\n", prefix, entry_name);
606 array_t*items = (array_t*)array_getvalue(file->metadata, t);
607 for(s=0;s<items->num;s++) {
608 fprintf(fo, "%s# %s=%s\n", prefix, array_getkey(items, s), array_getvalue(items,s));
610 fprintf(fo, "%s#\n", prefix);
613 for(t=0;t<file->classes->num;t++) {
614 abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
616 sprintf(prefix2, "%s ", prefix);
618 fprintf(fo, "%s", prefix);
619 if(cls->flags&1) fprintf(fo, "sealed ");
620 if(cls->flags&2) fprintf(fo, "final ");
621 if(cls->flags&4) fprintf(fo, "interface ");
623 char*s = namespace_tostring(cls->protectedNS);
624 fprintf(fo, "protectedNS(%s) ", s);
628 char*classname = multiname_tostring(cls->classname);
629 fprintf(fo, "class %s", classname);
631 if(cls->superclass) {
632 char*supername = multiname_tostring(cls->superclass);
633 fprintf(fo, " extends %s", supername);
635 multiname_list_t*ilist = cls->interfaces;
637 fprintf(fo, " implements");
639 char*s = multiname_tostring(ilist->multiname);
640 fprintf(fo, " %s", s);
647 fprintf(fo, "extra flags=%02x\n", cls->flags&0xf0);
648 fprintf(fo, "%s{\n", prefix);
650 if(cls->static_constructor)
651 dump_method(fo, prefix2,"staticconstructor", "", cls->static_constructor, file);
652 traits_dump(fo, prefix2, cls->static_traits, file);
654 char*n = multiname_tostring(cls->classname);
656 dump_method(fo, prefix2, "constructor", n, cls->constructor, file);
658 traits_dump(fo, prefix2,cls->traits, file);
659 fprintf(fo, "%s}\n", prefix);
662 fprintf(fo, "%s\n", prefix);
664 for(t=0;t<file->scripts->num;t++) {
665 abc_script_t*s = (abc_script_t*)array_getvalue(file->scripts, t);
666 dump_method(fo, prefix,"initmethod", "init", s->method, file);
667 traits_dump(fo, prefix, s->traits, file);
672 void* swf_ReadABC(TAG*tag)
674 abc_file_t* file = abc_file_new();
675 pool_t*pool = pool_new();
677 swf_SetTagPos(tag, 0);
679 if(tag->id == ST_DOABC) {
680 U32 abcflags = swf_GetU32(tag);
681 DEBUG printf("flags=%08x\n", abcflags);
682 char*name= swf_GetString(tag);
683 file->name = (name&&name[0])?strdup(name):0;
685 U32 version = swf_GetU32(tag);
686 if(version!=0x002e0010) {
687 fprintf(stderr, "Warning: unknown AVM2 version %08x\n", version);
690 pool_read(pool, tag);
692 int num_methods = swf_GetU30(tag);
693 DEBUG printf("%d methods\n", num_methods);
694 for(t=0;t<num_methods;t++) {
696 int param_count = swf_GetU30(tag);
697 int return_type_index = swf_GetU30(tag);
698 if(return_type_index)
699 m->return_type = multiname_clone(pool_lookup_multiname(pool, return_type_index));
704 for(s=0;s<param_count;s++) {
705 int type_index = swf_GetU30(tag);
707 /* type_index might be 0, which probably means "..." (varargs) */
708 multiname_t*param = type_index?multiname_clone(pool_lookup_multiname(pool, type_index)):0;
709 list_append(m->parameters, param);
712 int namenr = swf_GetU30(tag);
714 m->name = strdup(pool_lookup_string(pool, namenr));
716 m->name = strdup("");
718 m->flags = swf_GetU8(tag);
720 DEBUG printf("method %d) %s %s flags=%02x\n", t, m->name, params_tostring(m->parameters), m->flags);
723 m->optional_parameters = list_new();
724 int num = swf_GetU30(tag);
727 int vindex = swf_GetU30(tag);
728 U8 vkind = swf_GetU8(tag); // specifies index type for "val"
729 constant_t*c = constant_fromindex(pool, vindex, vkind);
730 list_append(m->optional_parameters, c);
734 /* debug information- not used by avm2 */
735 multiname_list_t*l = m->parameters;
737 const char*name = pool_lookup_string(pool, swf_GetU30(tag));
741 m->index = array_length(file->methods);
742 array_append(file->methods, NO_KEY, m);
745 parse_metadata(tag, file, pool);
747 /* skip classes, and scripts for now, and do the real parsing later */
748 int num_classes = swf_GetU30(tag);
749 int classes_pos = tag->pos;
750 DEBUG printf("%d classes\n", num_classes);
751 for(t=0;t<num_classes;t++) {
752 abc_class_t*cls = malloc(sizeof(abc_class_t));
753 memset(cls, 0, sizeof(abc_class_t));
755 swf_GetU30(tag); //classname
756 swf_GetU30(tag); //supername
758 array_append(file->classes, NO_KEY, cls);
760 cls->flags = swf_GetU8(tag);
761 DEBUG printf("class %d %02x\n", t, cls->flags);
763 swf_GetU30(tag); //protectedNS
765 int inum = swf_GetU30(tag); //interface count
767 for(s=0;s<inum;s++) {
768 int interface_index = swf_GetU30(tag);
769 multiname_t* m = multiname_clone(pool_lookup_multiname(pool, interface_index));
770 list_append(cls->interfaces, m);
771 DEBUG printf(" class %d interface: %s\n", t, m->name);
774 int iinit = swf_GetU30(tag); //iinit
775 DEBUG printf("--iinit-->%d\n", iinit);
778 for(t=0;t<num_classes;t++) {
779 abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
780 int cinit = swf_GetU30(tag);
781 DEBUG printf("--cinit(%d)-->%d\n", t, cinit);
782 cls->static_constructor = (abc_method_t*)array_getvalue(file->methods, cinit);
785 int num_scripts = swf_GetU30(tag);
786 DEBUG printf("%d scripts\n", num_scripts);
787 for(t=0;t<num_scripts;t++) {
788 int init = swf_GetU30(tag);
792 int num_method_bodies = swf_GetU30(tag);
793 DEBUG printf("%d method bodies\n", num_method_bodies);
794 for(t=0;t<num_method_bodies;t++) {
795 int methodnr = swf_GetU30(tag);
796 if(methodnr >= file->methods->num) {
797 printf("Invalid method number: %d\n", methodnr);
800 abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, methodnr);
801 abc_method_body_t*c = malloc(sizeof(abc_method_body_t));
802 memset(c, 0, sizeof(abc_method_body_t));
803 c->old.max_stack = swf_GetU30(tag);
804 c->old.local_count = swf_GetU30(tag);
805 c->old.init_scope_depth = swf_GetU30(tag);
806 c->old.max_scope_depth = swf_GetU30(tag);
808 c->init_scope_depth = c->old.init_scope_depth;
809 int code_length = swf_GetU30(tag);
814 int pos = tag->pos + code_length;
815 codelookup_t*codelookup = 0;
816 c->code = code_parse(tag, code_length, file, pool, &codelookup);
819 int exception_count = swf_GetU30(tag);
821 c->exceptions = list_new();
822 for(s=0;s<exception_count;s++) {
823 abc_exception_t*e = malloc(sizeof(abc_exception_t));
825 e->from = code_atposition(codelookup, swf_GetU30(tag));
826 e->to = code_atposition(codelookup, swf_GetU30(tag));
827 e->target = code_atposition(codelookup, swf_GetU30(tag));
829 e->exc_type = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
830 e->var_name = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
831 //e->var_name = pool_lookup_string(pool, swf_GetU30(tag));
832 //if(e->var_name) e->var_name = strdup(e->var_name);
833 list_append(c->exceptions, e);
835 codelookup_free(codelookup);
836 c->traits = traits_parse(tag, pool, file);
838 DEBUG printf("method_body %d) (method %d), %d bytes of code\n", t, methodnr, code_length);
840 array_append(file->method_bodies, NO_KEY, c);
842 if(tag->len - tag->pos) {
843 fprintf(stderr, "%d unparsed bytes remaining in ABC block\n", tag->len - tag->pos);
847 swf_SetTagPos(tag, classes_pos);
848 for(t=0;t<num_classes;t++) {
849 abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
851 int classname_index = swf_GetU30(tag);
852 int superclass_index = swf_GetU30(tag);
853 cls->classname = multiname_clone(pool_lookup_multiname(pool, classname_index));
854 cls->superclass = multiname_clone(pool_lookup_multiname(pool, superclass_index));
855 cls->flags = swf_GetU8(tag);
858 int ns_index = swf_GetU30(tag);
859 cls->protectedNS = namespace_clone(pool_lookup_namespace(pool, ns_index));
862 int num_interfaces = swf_GetU30(tag); //interface count
864 for(s=0;s<num_interfaces;s++) {
867 int iinit = swf_GetU30(tag);
868 cls->constructor = (abc_method_t*)array_getvalue(file->methods, iinit);
869 cls->traits = traits_parse(tag, pool, file);
871 for(t=0;t<num_classes;t++) {
872 abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
874 swf_GetU30(tag); // cindex
875 cls->static_traits = traits_parse(tag, pool, file);
877 int num_scripts2 = swf_GetU30(tag);
878 for(t=0;t<num_scripts2;t++) {
879 int init = swf_GetU30(tag);
880 abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, init);
882 abc_script_t*s = malloc(sizeof(abc_script_t));
883 memset(s, 0, sizeof(abc_script_t));
885 s->traits = traits_parse(tag, pool, file);
886 array_append(file->scripts, NO_KEY, s);
893 void swf_WriteABC(TAG*abctag, void*code)
895 abc_file_t*file = (abc_file_t*)code;
896 pool_t*pool = pool_new();
898 TAG*tmp = swf_InsertTag(0,0);
902 /* add method bodies where needed */
903 for(t=0;t<file->classes->num;t++) {
904 abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
905 if(!c->constructor) {
906 if(!(c->flags&CLASS_INTERFACE)) {
907 NEW(abc_method_t,m);array_append(file->methods, NO_KEY, m);
908 NEW(abc_method_body_t,body);array_append(file->method_bodies, NO_KEY, body);
909 // don't bother to set m->index
910 body->method = m; m->body = body;
914 NEW(abc_method_t,m);array_append(file->methods, NO_KEY, m);
918 if(!c->static_constructor) {
919 NEW(abc_method_t,m);array_append(file->methods, NO_KEY, m);
920 NEW(abc_method_body_t,body);array_append(file->method_bodies, NO_KEY, body);
921 body->method = m; m->body = body;
923 c->static_constructor = m;
928 swf_SetU30(tag, file->methods->num);
929 /* enumerate classes, methods and method bodies */
930 for(t=0;t<file->methods->num;t++) {
931 abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, t);
934 for(t=0;t<file->classes->num;t++) {
935 abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
938 for(t=0;t<file->method_bodies->num;t++) {
939 abc_method_body_t*m = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
943 /* generate code statistics */
944 for(t=0;t<file->method_bodies->num;t++) {
945 abc_method_body_t*m = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
946 m->stats = code_get_statistics(m->code, m->exceptions);
949 /* level init scope depths: The init scope depth of a method is
950 always as least as high as the init scope depth of it's surrounding
952 A method has it's own init_scope_depth if it's an init method
953 (then its init scope depth is zero), or if it's used as a closure.
955 Not sure yet what to do with methods which are used at different
956 locations- e.g. the nullmethod is used all over the place.
957 EDIT: flashplayer doesn't allow this anyway- a method can only
960 Also, I have the strong suspicion that flash player uses only
961 the difference between max_scope_stack and init_scope_stack, anyway.
963 for(t=0;t<file->classes->num;t++) {
964 abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
965 trait_list_t*traits = c->traits;
966 if(c->constructor && c->constructor->body &&
967 c->constructor->body->init_scope_depth < c->init_scope_depth) {
968 c->constructor->body->init_scope_depth = c->init_scope_depth;
970 if(c->static_constructor && c->static_constructor->body &&
971 c->static_constructor->body->init_scope_depth < c->init_scope_depth) {
972 c->static_constructor->body->init_scope_depth = c->init_scope_depth;
975 trait_t*trait = traits->trait;
976 if(trait_is_method(trait) && trait->method->body) {
977 abc_method_body_t*body = trait->method->body;
978 if(body->init_scope_depth < c->init_scope_depth) {
979 body->init_scope_depth = c->init_scope_depth;
982 traits = traits->next;
986 for(t=0;t<file->methods->num;t++) {
987 abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, t);
989 multiname_list_t*l = m->parameters;
990 int num_params = list_length(m->parameters);
991 swf_SetU30(tag, num_params);
993 swf_SetU30(tag, pool_register_multiname(pool, m->return_type));
998 swf_SetU30(tag, pool_register_multiname(pool, l->multiname));
1002 swf_SetU30(tag, pool_register_string(pool, m->name));
1007 U8 flags = m->flags&(METHOD_NEED_REST|METHOD_NEED_ARGUMENTS);
1008 if(m->optional_parameters)
1009 flags |= METHOD_HAS_OPTIONAL;
1011 flags |= m->body->stats->flags;
1014 swf_SetU8(tag, flags);
1015 if(flags&METHOD_HAS_OPTIONAL) {
1016 swf_SetU30(tag, list_length(m->optional_parameters));
1017 constant_list_t*l = m->optional_parameters;
1019 swf_SetU30(tag, constant_get_index(pool, l->constant));
1020 swf_SetU8(tag, l->constant->type);
1026 /* write metadata */
1027 swf_SetU30(tag, file->metadata->num);
1028 for(t=0;t<file->metadata->num;t++) {
1029 const char*entry_name = array_getkey(file->metadata, t);
1030 swf_SetU30(tag, pool_register_string(pool, entry_name));
1031 array_t*items = (array_t*)array_getvalue(file->metadata, t);
1032 swf_SetU30(tag, items->num);
1034 for(s=0;s<items->num;s++) {
1035 int i1 = pool_register_string(pool, array_getkey(items, s));
1036 int i2 = pool_register_string(pool, array_getvalue(items, s));
1037 swf_SetU30(tag, i1);
1038 swf_SetU30(tag, i2);
1042 swf_SetU30(tag, file->classes->num);
1043 for(t=0;t<file->classes->num;t++) {
1044 abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
1046 int classname_index = pool_register_multiname(pool, c->classname);
1047 int superclass_index = pool_register_multiname(pool, c->superclass);
1049 swf_SetU30(tag, classname_index);
1050 swf_SetU30(tag, superclass_index);
1052 swf_SetU8(tag, c->flags); // flags
1054 int ns_index = pool_register_namespace(pool, c->protectedNS);
1055 swf_SetU30(tag, ns_index);
1058 swf_SetU30(tag, list_length(c->interfaces));
1059 multiname_list_t*interface= c->interfaces;
1061 swf_SetU30(tag, pool_register_multiname(pool, interface->multiname));
1062 interface = interface->next;
1065 assert(c->constructor);
1066 swf_SetU30(tag, c->constructor->index);
1068 traits_write(pool, tag, c->traits);
1070 for(t=0;t<file->classes->num;t++) {
1071 abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
1072 assert(c->static_constructor);
1073 swf_SetU30(tag, c->static_constructor->index);
1075 traits_write(pool, tag, c->static_traits);
1078 swf_SetU30(tag, file->scripts->num);
1079 for(t=0;t<file->scripts->num;t++) {
1080 abc_script_t*s = (abc_script_t*)array_getvalue(file->scripts, t);
1081 swf_SetU30(tag, s->method->index); //!=t!
1082 traits_write(pool, tag, s->traits);
1085 swf_SetU30(tag, file->method_bodies->num);
1086 for(t=0;t<file->method_bodies->num;t++) {
1087 abc_method_body_t*c = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1088 abc_method_t*m = c->method;
1089 swf_SetU30(tag, m->index);
1091 //swf_SetU30(tag, c->old.max_stack);
1092 //swf_SetU30(tag, c->old.local_count);
1093 //swf_SetU30(tag, c->old.init_scope_depth);
1094 //swf_SetU30(tag, c->old.max_scope_depth);
1096 swf_SetU30(tag, c->stats->max_stack);
1098 int param_num = list_length(c->method->parameters)+1;
1099 if(c->method->flags&METHOD_NEED_REST)
1101 if(param_num <= c->stats->local_count)
1102 swf_SetU30(tag, c->stats->local_count);
1104 swf_SetU30(tag, param_num);
1106 swf_SetU30(tag, c->init_scope_depth);
1107 swf_SetU30(tag, c->stats->max_scope_depth+
1108 c->init_scope_depth);
1110 code_write(tag, c->code, pool, file);
1112 swf_SetU30(tag, list_length(c->exceptions));
1113 abc_exception_list_t*l = c->exceptions;
1115 // warning: assumes "pos" in each code_t is up-to-date
1116 swf_SetU30(tag, l->abc_exception->from->pos);
1117 swf_SetU30(tag, l->abc_exception->to->pos);
1118 swf_SetU30(tag, l->abc_exception->target->pos);
1119 swf_SetU30(tag, pool_register_multiname(pool, l->abc_exception->exc_type));
1120 swf_SetU30(tag, pool_register_multiname(pool, l->abc_exception->var_name));
1124 traits_write(pool, tag, c->traits);
1127 /* free temporary codestat data again. Notice: If we were to write this
1128 file multiple times, this can also be shifted to abc_file_free() */
1129 for(t=0;t<file->method_bodies->num;t++) {
1130 abc_method_body_t*m = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1131 codestats_free(m->stats);m->stats=0;
1134 // --- start to write real tag --
1138 if(tag->id == ST_DOABC) {
1139 swf_SetU32(tag, file->flags); // flags
1140 swf_SetString(tag, file->name);
1143 swf_SetU16(tag, 0x10); //version
1144 swf_SetU16(tag, 0x2e);
1146 pool_write(pool, tag);
1148 swf_SetBlock(tag, tmp->data, tmp->len);
1150 swf_DeleteTag(0, tmp);
1154 void abc_file_free(abc_file_t*file)
1157 if(file->metadata) {
1158 for(t=0;t<file->metadata->num;t++) {
1159 array_t*items = (array_t*)array_getvalue(file->metadata, t);
1161 for(s=0;s<items->num;s++) {
1162 free(array_getvalue(items, s));
1166 array_free(file->metadata);file->metadata=0;
1169 for(t=0;t<file->methods->num;t++) {
1170 abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, t);
1172 multiname_list_t*param = m->parameters;
1174 multiname_destroy(param->multiname);param->multiname=0;
1175 param = param->next;
1177 list_free(m->parameters);m->parameters=0;
1179 constant_list_t*opt = m->optional_parameters;
1181 constant_free(opt->constant);opt->constant=0;
1184 list_free(m->optional_parameters);m->optional_parameters=0;
1187 free((void*)m->name);m->name=0;
1189 if(m->return_type) {
1190 multiname_destroy(m->return_type);
1194 array_free(file->methods);file->methods=0;
1196 for(t=0;t<file->classes->num;t++) {
1197 abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
1198 traits_free(cls->traits);cls->traits=0;
1199 traits_free(cls->static_traits);cls->static_traits=0;
1201 if(cls->classname) {
1202 multiname_destroy(cls->classname);
1204 if(cls->superclass) {
1205 multiname_destroy(cls->superclass);
1208 multiname_list_t*i = cls->interfaces;
1210 multiname_destroy(i->multiname);i->multiname=0;
1213 list_free(cls->interfaces);cls->interfaces=0;
1215 if(cls->protectedNS) {
1216 namespace_destroy(cls->protectedNS);
1220 array_free(file->classes);file->classes=0;
1222 for(t=0;t<file->scripts->num;t++) {
1223 abc_script_t*s = (abc_script_t*)array_getvalue(file->scripts, t);
1224 traits_free(s->traits);s->traits=0;
1227 array_free(file->scripts);file->scripts=0;
1229 for(t=0;t<file->method_bodies->num;t++) {
1230 abc_method_body_t*body = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1231 code_free(body->code);body->code=0;
1232 traits_free(body->traits);body->traits=0;
1234 abc_exception_list_t*ee = body->exceptions;
1236 abc_exception_t*e=ee->abc_exception;ee->abc_exception=0;
1237 e->from = e->to = e->target = 0;
1238 multiname_destroy(e->exc_type);e->exc_type=0;
1239 multiname_destroy(e->var_name);e->var_name=0;
1243 list_free(body->exceptions);body->exceptions=0;
1247 array_free(file->method_bodies);file->method_bodies=0;
1250 free((void*)file->name);file->name=0;
1256 void swf_FreeABC(void*code)
1258 abc_file_t*file= (abc_file_t*)code;
1259 abc_file_free(file);
1262 void swf_AddButtonLinks(SWF*swf, char stop_each_frame, char events)
1265 int has_buttons = 0;
1266 TAG*tag=swf->firstTag;
1268 if(tag->id == ST_SHOWFRAME)
1270 if(tag->id == ST_DEFINEBUTTON || tag->id == ST_DEFINEBUTTON2)
1275 abc_file_t*file = abc_file_new();
1276 abc_method_body_t*c = 0;
1278 abc_class_t*cls = abc_class_new2(file, "rfx::MainTimeline", "flash.display::MovieClip");
1279 abc_class_protectedNS(cls, "rfx:MainTimeline");
1281 TAG*abctag = swf_InsertTagBefore(swf, swf->firstTag, ST_DOABC);
1283 tag = swf_InsertTag(abctag, ST_SYMBOLCLASS);
1286 swf_SetString(tag, "rfx.MainTimeline");
1288 c = abc_class_staticconstructor(cls, 0, 0)->body;
1289 c->old.max_stack = 1;
1290 c->old.local_count = 1;
1291 c->old.init_scope_depth = 9;
1292 c->old.max_scope_depth = 10;
1298 c = abc_class_constructor(cls, 0, 0)->body;
1299 c->old.max_stack = 3;
1300 c->old.local_count = 1;
1301 c->old.init_scope_depth = 10;
1302 c->old.max_scope_depth = 11;
1304 debugfile(c, "constructor.as");
1310 __ constructsuper(c,0);
1312 __ getlex(c, "[package]flash.system::Security");
1313 __ pushstring(c, "*");
1314 __ callpropvoid(c, "[package]::allowDomain", 1);
1316 if(stop_each_frame || has_buttons) {
1318 tag = swf->firstTag;
1319 abc_method_body_t*f = 0; //frame script
1320 while(tag && tag->id!=ST_END) {
1322 char needs_framescript=0;
1323 char buttonname[80];
1324 char functionname[80];
1325 sprintf(framename, "[packageinternal]rfx::frame%d", frame);
1327 if(!f && (tag->id == ST_DEFINEBUTTON || tag->id == ST_DEFINEBUTTON2 || stop_each_frame)) {
1328 /* make the contructor add a frame script */
1329 __ findpropstrict(c,"[package]::addFrameScript");
1330 __ pushbyte(c,frame);
1331 __ getlex(c,framename);
1332 __ callpropvoid(c,"[package]::addFrameScript",2);
1334 f = abc_class_method(cls, 0, framename, 0)->body;
1335 f->old.max_stack = 3;
1336 f->old.local_count = 1;
1337 f->old.init_scope_depth = 10;
1338 f->old.max_scope_depth = 11;
1339 __ debugfile(f, "framescript.as");
1343 if(stop_each_frame) {
1344 __ findpropstrict(f, "[package]::stop");
1345 __ callpropvoid(f, "[package]::stop", 0);
1349 if(tag->id == ST_DEFINEBUTTON || tag->id == ST_DEFINEBUTTON2) {
1350 U16 id = swf_GetDefineID(tag);
1351 sprintf(buttonname, "::button%d", swf_GetDefineID(tag));
1352 __ getlex(f,buttonname);
1353 __ getlex(f,"flash.events::MouseEvent");
1354 __ getproperty(f, "::CLICK");
1355 sprintf(functionname, "::clickbutton%d", swf_GetDefineID(tag));
1356 __ getlex(f,functionname);
1357 __ callpropvoid(f, "::addEventListener" ,2);
1359 needs_framescript = 1;
1361 abc_method_body_t*h =
1362 abc_class_method(cls, 0, functionname, 1, "flash.events::MouseEvent")->body;
1363 h->old.max_stack = 6;
1364 h->old.local_count = 2;
1365 h->old.init_scope_depth = 10;
1366 h->old.max_scope_depth = 11;
1370 ActionTAG*oldaction = swf_ButtonGetAction(tag);
1371 if(oldaction && oldaction->op == ACTION__GOTOFRAME) {
1372 int framenr = GET16(oldaction->data);
1374 fprintf(stderr, "Warning: Couldn't translate jump to frame %d to flash 9 actionscript\n", framenr);
1377 __ findpropstrict(h,"[package]::gotoAndStop");
1378 __ pushbyte(h,framenr+1);
1379 __ callpropvoid(h,"[package]::gotoAndStop", 1);
1382 sprintf(framename, "frame%d", framenr);
1383 __ getlocal_0(h); //this
1384 __ findpropstrict(h, "[package]flash.events::TextEvent");
1385 __ pushstring(h, "link");
1388 __ pushstring(h, framename);
1389 __ constructprop(h,"[package]flash.events::TextEvent", 4);
1390 __ callpropvoid(h,"[package]::dispatchEvent", 1);
1392 } else if(oldaction && oldaction->op == ACTION__GETURL) {
1394 __ findpropstrict(h,"flash.net::navigateToURL");
1395 __ findpropstrict(h,"flash.net::URLRequest");
1396 // TODO: target _blank
1397 __ pushstring(h,oldaction->data); //url
1398 __ constructprop(h,"flash.net::URLRequest", 1);
1399 __ callpropvoid(h,"flash.net::navigateToURL", 1);
1401 __ getlocal_0(h); //this
1402 __ findpropstrict(h, "[package]flash.events::TextEvent");
1403 __ pushstring(h, "link");
1406 __ pushstring(h,oldaction->data); //url
1407 __ constructprop(h,"[package]flash.events::TextEvent", 4);
1408 __ callpropvoid(h,"[package]::dispatchEvent", 1);
1410 } else if(oldaction) {
1411 fprintf(stderr, "Warning: Couldn't translate button code of button %d to flash 9 abc action\n", id);
1414 swf_ActionFree(oldaction);
1416 if(tag->id == ST_SHOWFRAME) {
1431 tag = swf->firstTag;
1433 if(tag->id == ST_DEFINEBUTTON || tag->id == ST_DEFINEBUTTON2) {
1434 char buttonname[80];
1435 sprintf(buttonname, "::button%d", swf_GetDefineID(tag));
1436 multiname_t*s = multiname_fromstring(buttonname);
1437 abc_class_slot(cls, buttonname, s);
1443 abc_script_t*s = abc_initscript(file, 0, 0);
1444 c = s->method->body;
1445 c->old.max_stack = 2;
1446 c->old.local_count = 1;
1447 c->old.init_scope_depth = 1;
1448 c->old.max_scope_depth = 9;
1452 __ getscopeobject(c, 0);
1453 __ getlex(c,"::Object");
1455 __ getlex(c,"flash.events::EventDispatcher");
1457 __ getlex(c,"flash.display::DisplayObject");
1459 __ getlex(c,"flash.display::InteractiveObject");
1461 __ getlex(c,"flash.display::DisplayObjectContainer");
1463 __ getlex(c,"flash.display::Sprite");
1465 __ getlex(c,"flash.display::MovieClip");
1467 __ getlex(c,"flash.display::MovieClip");
1476 __ initproperty(c,"rfx::MainTimeline");
1479 //abc_method_body_addClassTrait(c, "rfx:MainTimeline", 1, cls);
1480 multiname_t*classname = multiname_fromstring("rfx::MainTimeline");
1481 abc_initscript_addClassTrait(s, classname, cls);
1482 multiname_destroy(classname);
1484 swf_WriteABC(abctag, file);