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 char*key = i1?pool_lookup_string(pool, i1):"";
101 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 abc_method_body_t* add_method(abc_file_t*file, abc_class_t*cls, multiname_t*returntype, int num_params, va_list va)
175 /* construct code (method body) object */
176 NEW(abc_method_body_t,c);
177 array_append(file->method_bodies, NO_KEY, c);
179 c->traits = list_new();
182 /* construct method object */
184 array_append(file->methods, NO_KEY, m);
186 m->return_type = returntype;
189 for(t=0;t<num_params;t++) {
190 const char*param = va_arg(va, const char*);
191 list_append(m->parameters, multiname_fromstring(param));
194 /* crosslink the two objects */
201 abc_method_body_t* abc_class_constructor(abc_class_t*cls, multiname_t*returntype, int num_params, ...)
204 va_start(va, num_params);
205 abc_method_body_t* c = add_method(cls->file, cls, returntype, num_params, va);
207 cls->constructor = c->method;
211 abc_method_body_t* abc_class_staticconstructor(abc_class_t*cls, multiname_t*returntype, int num_params, ...)
214 va_start(va, num_params);
215 abc_method_body_t* c = add_method(cls->file, cls, returntype, num_params, va);
217 cls->static_constructor = c->method;
221 trait_t*trait_new(int type, multiname_t*name, int data1, int data2, constant_t*v)
223 trait_t*trait = malloc(sizeof(trait_t));
224 memset(trait, 0, sizeof(trait_t));
225 trait->kind = type&0x0f;
226 trait->attributes = type&0xf0;
228 trait->data1 = data1;
229 trait->data2 = data2;
233 trait_t*trait_new_member(multiname_t*type, multiname_t*name,constant_t*v)
235 int kind = TRAIT_SLOT;
236 trait_t*trait = malloc(sizeof(trait_t));
237 memset(trait, 0, sizeof(trait_t));
238 trait->kind = kind&0x0f;
239 trait->attributes = kind&0xf0;
241 trait->type_name = type;
244 trait_t*trait_new_method(multiname_t*name, abc_method_t*m)
246 int type = TRAIT_METHOD;
247 trait_t*trait = malloc(sizeof(trait_t));
248 memset(trait, 0, sizeof(trait_t));
249 trait->kind = type&0x0f;
250 trait->attributes = type&0xf0;
256 abc_method_body_t* abc_class_method(abc_class_t*cls, multiname_t*returntype, char*name, int num_params, ...)
258 abc_file_t*file = cls->file;
260 va_start(va, num_params);
261 abc_method_body_t* c = add_method(cls->file, cls, returntype, num_params, va);
263 list_append(cls->traits, trait_new_method(multiname_fromstring(name), c->method));
267 trait_t* abc_class_slot(abc_class_t*cls, char*name, multiname_t*type)
269 abc_file_t*file = cls->file;
270 multiname_t*m_name = multiname_fromstring(name);
271 multiname_t*m_type = type;
272 trait_t*t = trait_new_member(m_type, m_name, 0);
273 t->slot_id = list_length(cls->traits);
274 list_append(cls->traits, t);
278 void abc_method_body_addClassTrait(abc_method_body_t*code, char*multiname, int slotid, abc_class_t*cls)
280 abc_file_t*file = code->file;
281 multiname_t*m = multiname_fromstring(multiname);
282 trait_t*trait = trait_new(TRAIT_CLASS, m, slotid, 0, 0);
284 list_append(code->traits, trait);
287 /* notice: traits of a method (body) belonging to an init script
288 and traits of the init script are *not* the same thing */
289 int abc_initscript_addClassTrait(abc_script_t*script, multiname_t*multiname, abc_class_t*cls)
291 abc_file_t*file = script->file;
292 multiname_t*m = multiname_clone(multiname);
293 int slotid = list_length(script->traits)+1;
294 trait_t*trait = trait_new(TRAIT_CLASS, m, slotid, 0, 0);
296 list_append(script->traits, trait);
300 abc_script_t* abc_initscript(abc_file_t*file, multiname_t*returntype, int num_params, ...)
303 va_start(va, num_params);
304 abc_method_body_t* c = add_method(file, 0, returntype, num_params, va);
305 abc_script_t* s = malloc(sizeof(abc_script_t));
306 s->method = c->method;
307 s->traits = list_new();
309 array_append(file->scripts, NO_KEY, s);
314 static void traits_dump(FILE*fo, const char*prefix, trait_list_t*traits, abc_file_t*file);
316 static void dump_method(FILE*fo, const char*prefix, const char*type, const char*name, abc_method_t*m, abc_file_t*file)
318 char*return_type = 0;
320 return_type = multiname_tostring(m->return_type);
322 return_type = strdup("void");
323 char*paramstr = params_tostring(m->parameters);
324 fprintf(fo, "%s%s %s %s=%s %s (%d params)\n", prefix, type, return_type, name, m->name, paramstr, list_length(m->parameters));
325 free(paramstr);paramstr=0;
326 free(return_type);return_type=0;
328 abc_method_body_t*c = m->body;
333 fprintf(fo, "%s[stack:%d locals:%d scope:%d-%d flags:",
334 prefix, c->old.max_stack, c->old.local_count, c->old.init_scope_depth,
335 c->old.max_scope_depth);
338 int flags = c->method->flags;
339 if(flags&METHOD_NEED_ARGUMENTS) {fprintf(fo, " need_arguments");flags&=~METHOD_NEED_ARGUMENTS;}
340 if(flags&METHOD_NEED_ACTIVATION) {fprintf(fo, " need_activation");flags&=~METHOD_NEED_ACTIVATION;}
341 if(flags&METHOD_NEED_REST) {fprintf(fo, " need_rest");flags&=~METHOD_NEED_REST;}
342 if(flags&METHOD_HAS_OPTIONAL) {fprintf(fo, " has_optional");flags&=~METHOD_HAS_OPTIONAL;}
343 if(flags&METHOD_SET_DXNS) {fprintf(fo, " set_dxns");flags&=~METHOD_SET_DXNS;}
344 if(flags&METHOD_HAS_PARAM_NAMES) {fprintf(fo, " has_param_names");flags&=~METHOD_HAS_PARAM_NAMES;}
345 if(flags) fprintf(fo, " %02x", flags);
350 sprintf(prefix2, "%s ", prefix);
352 traits_dump(fo, prefix, c->traits, file);
353 fprintf(fo, "%s{\n", prefix);
354 code_dump(c->code, c->exceptions, file, prefix2, fo);
355 fprintf(fo, "%s}\n\n", prefix);
358 static void traits_free(trait_list_t*traits)
360 trait_list_t*t = traits;
363 multiname_destroy(t->trait->name);t->trait->name = 0;
365 if(t->trait->kind == TRAIT_SLOT || t->trait->kind == TRAIT_CONST) {
366 multiname_destroy(t->trait->type_name);
368 if(t->trait->value) {
369 constant_free(t->trait->value);t->trait->value = 0;
371 free(t->trait);t->trait = 0;
377 static char trait_is_method(trait_t*trait)
379 return (trait->kind == TRAIT_METHOD || trait->kind == TRAIT_GETTER ||
380 trait->kind == TRAIT_SETTER || trait->kind == TRAIT_FUNCTION);
383 static trait_list_t* traits_parse(TAG*tag, pool_t*pool, abc_file_t*file)
385 int num_traits = swf_GetU30(tag);
386 trait_list_t*traits = list_new();
389 DEBUG printf("%d traits\n", num_traits);
392 for(t=0;t<num_traits;t++) {
394 list_append(traits, trait);
396 trait->name = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag))); // always a QName (ns,name)
399 DEBUG name = multiname_tostring(trait->name);
400 U8 kind = swf_GetU8(tag);
401 U8 attributes = kind&0xf0;
404 trait->attributes = attributes;
405 DEBUG printf(" trait %d) %s type=%02x\n", t, name, kind);
406 if(kind == TRAIT_METHOD || kind == TRAIT_GETTER || kind == TRAIT_SETTER) { // method / getter / setter
407 trait->disp_id = swf_GetU30(tag);
408 trait->method = (abc_method_t*)array_getvalue(file->methods, swf_GetU30(tag));
409 DEBUG printf(" method/getter/setter\n");
410 } else if(kind == TRAIT_FUNCTION) { // function
411 trait->slot_id = swf_GetU30(tag);
412 trait->method = (abc_method_t*)array_getvalue(file->methods, swf_GetU30(tag));
413 } else if(kind == TRAIT_CLASS) { // class
414 trait->slot_id = swf_GetU30(tag);
415 trait->cls = (abc_class_t*)array_getvalue(file->classes, swf_GetU30(tag));
416 DEBUG printf(" class %s %d %d\n", name, trait->slot_id, trait->cls);
417 } else if(kind == TRAIT_SLOT || kind == TRAIT_CONST) { // slot, const
418 /* a slot is a variable in a class that is shared amonst all instances
419 of the same type, but which has a unique location in each object
420 (in other words, slots are non-static, traits are static)
422 trait->slot_id = swf_GetU30(tag);
423 trait->type_name = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
424 int vindex = swf_GetU30(tag);
426 int vkind = swf_GetU8(tag);
427 trait->value = constant_fromindex(pool, vindex, vkind);
429 DEBUG printf(" slot %s %d %s (%s)\n", name, trait->slot_id, trait->type_name->name, constant_tostring(trait->value));
431 fprintf(stderr, "Can't parse trait type %d\n", kind);
433 if(attributes&0x40) {
434 int num = swf_GetU30(tag);
437 swf_GetU30(tag); //index into metadata array
444 void traits_skip(TAG*tag)
446 int num_traits = swf_GetU30(tag);
448 for(t=0;t<num_traits;t++) {
450 U8 kind = swf_GetU8(tag);
451 U8 attributes = kind&0xf0;
455 if(kind == TRAIT_SLOT || kind == TRAIT_CONST) {
456 if(swf_GetU30(tag)) swf_GetU8(tag);
457 } else if(kind>TRAIT_CONST) {
458 fprintf(stderr, "Can't parse trait type %d\n", kind);
460 if(attributes&0x40) {
461 int s, num = swf_GetU30(tag);
462 for(s=0;s<num;s++) swf_GetU30(tag);
468 static void traits_write(pool_t*pool, TAG*tag, trait_list_t*traits)
474 swf_SetU30(tag, list_length(traits));
478 trait_t*trait = traits->trait;
480 swf_SetU30(tag, pool_register_multiname(pool, trait->name));
481 swf_SetU8(tag, trait->kind|trait->attributes);
483 swf_SetU30(tag, trait->data1);
485 if(trait->kind == TRAIT_CLASS) {
486 swf_SetU30(tag, trait->cls->index);
487 } else if(trait->kind == TRAIT_GETTER ||
488 trait->kind == TRAIT_SETTER ||
489 trait->kind == TRAIT_METHOD) {
490 swf_SetU30(tag, trait->method->index);
491 } else if(trait->kind == TRAIT_SLOT ||
492 trait->kind == TRAIT_CONST) {
493 int index = pool_register_multiname(pool, trait->type_name);
494 swf_SetU30(tag, index);
496 swf_SetU30(tag, trait->data2);
499 if(trait->kind == TRAIT_SLOT || trait->kind == TRAIT_CONST) {
500 int vindex = constant_get_index(pool, trait->value);
501 swf_SetU30(tag, vindex);
503 swf_SetU8(tag, trait->value->type);
506 if(trait->attributes&0x40) {
510 traits = traits->next;
515 static void traits_dump(FILE*fo, const char*prefix, trait_list_t*traits, abc_file_t*file)
519 trait_t*trait = traits->trait;
520 char*name = multiname_tostring(trait->name);
521 U8 kind = trait->kind;
522 U8 attributes = trait->attributes;
523 if(kind == TRAIT_METHOD) {
524 abc_method_t*m = trait->method;
525 dump_method(fo, prefix, "method", name, m, file);
526 } else if(kind == TRAIT_GETTER) {
527 abc_method_t*m = trait->method;
528 dump_method(fo, prefix, "getter", name, m, file);
529 } else if(kind == TRAIT_SETTER) {
530 abc_method_t*m = trait->method;
531 dump_method(fo, prefix, "setter", name, m, file);
532 } else if(kind == TRAIT_FUNCTION) { // function
533 abc_method_t*m = trait->method;
534 dump_method(fo, prefix, "function", name, m, file);
535 } else if(kind == TRAIT_CLASS) { // class
536 abc_class_t*cls = trait->cls;
538 fprintf(fo, "%sslot %d: class %s=00000000\n", prefix, trait->slot_id, name);
540 fprintf(fo, "%sslot %d: class %s=%s\n", prefix, trait->slot_id, name, cls->classname->name);
542 } else if(kind == TRAIT_SLOT || kind == TRAIT_CONST) { // slot, const
543 int slot_id = trait->slot_id;
544 char*type_name = multiname_tostring(trait->type_name);
545 char*value = constant_tostring(trait->value);
546 fprintf(fo, "%sslot %d: %s%s %s %s %s\n", prefix, trait->slot_id,
547 kind==TRAIT_CONST?"const ":"", type_name, name,
548 value?"=":"", value);
549 if(value) free(value);
552 fprintf(fo, "%s can't dump trait type %d\n", prefix, kind);
559 void* swf_DumpABC(FILE*fo, void*code, char*prefix)
561 abc_file_t* file = (abc_file_t*)code;
564 fprintf(fo, "%s#\n", prefix);
565 fprintf(fo, "%s#name: %s\n", prefix, file->name);
566 fprintf(fo, "%s#\n", prefix);
570 for(t=0;t<file->metadata->num;t++) {
571 const char*entry_name = array_getkey(file->metadata, t);
572 fprintf(fo, "%s#Metadata \"%s\":\n", prefix, entry_name);
574 array_t*items = (array_t*)array_getvalue(file->metadata, t);
575 for(s=0;s<items->num;s++) {
576 fprintf(fo, "%s# %s=%s\n", prefix, array_getkey(items, s), array_getvalue(items,s));
578 fprintf(fo, "%s#\n", prefix);
581 for(t=0;t<file->classes->num;t++) {
582 abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
584 sprintf(prefix2, "%s ", prefix);
586 fprintf(fo, "%s", prefix);
587 if(cls->flags&1) fprintf(fo, "sealed ");
588 if(cls->flags&2) fprintf(fo, "final ");
589 if(cls->flags&4) fprintf(fo, "interface ");
591 char*s = namespace_tostring(cls->protectedNS);
592 fprintf(fo, "protectedNS(%s) ", s);
596 char*classname = multiname_tostring(cls->classname);
597 fprintf(fo, "class %s", classname);
599 if(cls->superclass) {
600 char*supername = multiname_tostring(cls->superclass);
601 fprintf(fo, " extends %s", supername);
603 multiname_list_t*ilist = cls->interfaces;
605 fprintf(fo, " implements");
607 char*s = multiname_tostring(ilist->multiname);
608 fprintf(fo, " %s", s);
615 fprintf(fo, "extra flags=%02x\n", cls->flags&0xf0);
616 fprintf(fo, "%s{\n", prefix);
618 if(cls->static_constructor)
619 dump_method(fo, prefix2,"staticconstructor", "", cls->static_constructor, file);
620 traits_dump(fo, prefix2, cls->static_traits, file);
622 char*n = multiname_tostring(cls->classname);
624 dump_method(fo, prefix2, "constructor", n, cls->constructor, file);
626 traits_dump(fo, prefix2,cls->traits, file);
627 fprintf(fo, "%s}\n", prefix);
630 fprintf(fo, "%s\n", prefix);
632 for(t=0;t<file->scripts->num;t++) {
633 abc_script_t*s = (abc_script_t*)array_getvalue(file->scripts, t);
634 dump_method(fo, prefix,"initmethod", "init", s->method, file);
635 traits_dump(fo, prefix, s->traits, file);
640 void* swf_ReadABC(TAG*tag)
642 abc_file_t* file = abc_file_new();
643 pool_t*pool = pool_new();
645 swf_SetTagPos(tag, 0);
647 if(tag->id == ST_DOABC) {
648 U32 abcflags = swf_GetU32(tag);
649 DEBUG printf("flags=%08x\n", abcflags);
650 char*name= swf_GetString(tag);
651 file->name = (name&&name[0])?strdup(name):0;
653 U32 version = swf_GetU32(tag);
654 if(version!=0x002e0010) {
655 fprintf(stderr, "Warning: unknown AVM2 version %08x\n", version);
658 pool_read(pool, tag);
660 int num_methods = swf_GetU30(tag);
661 DEBUG printf("%d methods\n", num_methods);
662 for(t=0;t<num_methods;t++) {
664 int param_count = swf_GetU30(tag);
665 int return_type_index = swf_GetU30(tag);
666 if(return_type_index)
667 m->return_type = multiname_clone(pool_lookup_multiname(pool, return_type_index));
672 for(s=0;s<param_count;s++) {
673 int type_index = swf_GetU30(tag);
675 /* type_index might be 0, which probably means "..." (varargs) */
676 multiname_t*param = type_index?multiname_clone(pool_lookup_multiname(pool, type_index)):0;
677 list_append(m->parameters, param);
680 int namenr = swf_GetU30(tag);
682 m->name = strdup(pool_lookup_string(pool, namenr));
684 m->name = strdup("");
686 m->flags = swf_GetU8(tag);
688 DEBUG printf("method %d) %s %s flags=%02x\n", t, m->name, params_tostring(m->parameters), m->flags);
691 /* TODO optional parameters */
692 m->optional_parameters = list_new();
693 int num = swf_GetU30(tag);
696 int vindex = swf_GetU30(tag);
697 U8 vkind = swf_GetU8(tag); // specifies index type for "val"
698 constant_t*c = constant_fromindex(pool, vindex, vkind);
699 list_append(m->optional_parameters, c);
703 /* debug information- not used by avm2 */
704 multiname_list_t*l = m->parameters;
706 char*name = pool_lookup_string(pool, swf_GetU30(tag));
710 array_append(file->methods, NO_KEY, m);
713 parse_metadata(tag, file, pool);
715 /* skip classes, and scripts for now, and do the real parsing later */
716 int num_classes = swf_GetU30(tag);
717 int classes_pos = tag->pos;
718 DEBUG printf("%d classes\n", num_classes);
719 for(t=0;t<num_classes;t++) {
720 abc_class_t*cls = malloc(sizeof(abc_class_t));
721 memset(cls, 0, sizeof(abc_class_t));
723 swf_GetU30(tag); //classname
724 swf_GetU30(tag); //supername
726 array_append(file->classes, NO_KEY, cls);
728 cls->flags = swf_GetU8(tag);
729 DEBUG printf("class %d %02x\n", t, cls->flags);
731 swf_GetU30(tag); //protectedNS
733 int inum = swf_GetU30(tag); //interface count
735 for(s=0;s<inum;s++) {
736 int interface_index = swf_GetU30(tag);
737 multiname_t* m = multiname_clone(pool_lookup_multiname(pool, interface_index));
738 list_append(cls->interfaces, m);
739 DEBUG printf(" class %d interface: %s\n", t, m->name);
742 int iinit = swf_GetU30(tag); //iinit
743 DEBUG printf("--iinit-->%d\n", iinit);
746 for(t=0;t<num_classes;t++) {
747 abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
748 int cinit = swf_GetU30(tag);
749 DEBUG printf("--cinit(%d)-->%d\n", t, cinit);
750 cls->static_constructor = (abc_method_t*)array_getvalue(file->methods, cinit);
753 int num_scripts = swf_GetU30(tag);
754 DEBUG printf("%d scripts\n", num_scripts);
755 for(t=0;t<num_scripts;t++) {
756 int init = swf_GetU30(tag);
760 int num_method_bodies = swf_GetU30(tag);
761 DEBUG printf("%d method bodies\n", num_method_bodies);
762 for(t=0;t<num_method_bodies;t++) {
763 int methodnr = swf_GetU30(tag);
764 if(methodnr >= file->methods->num) {
765 printf("Invalid method number: %d\n", methodnr);
768 abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, methodnr);
769 abc_method_body_t*c = malloc(sizeof(abc_method_body_t));
770 memset(c, 0, sizeof(abc_method_body_t));
771 c->old.max_stack = swf_GetU30(tag);
772 c->old.local_count = swf_GetU30(tag);
773 c->old.init_scope_depth = swf_GetU30(tag);
774 c->old.max_scope_depth = swf_GetU30(tag);
776 c->init_scope_depth = c->old.init_scope_depth;
777 int code_length = swf_GetU30(tag);
782 int pos = tag->pos + code_length;
783 codelookup_t*codelookup = 0;
784 c->code = code_parse(tag, code_length, file, pool, &codelookup);
787 int exception_count = swf_GetU30(tag);
789 c->exceptions = list_new();
790 for(s=0;s<exception_count;s++) {
791 abc_exception_t*e = malloc(sizeof(abc_exception_t));
793 e->from = code_atposition(codelookup, swf_GetU30(tag));
794 e->to = code_atposition(codelookup, swf_GetU30(tag));
795 e->target = code_atposition(codelookup, swf_GetU30(tag));
797 e->exc_type = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
798 e->var_name = multiname_clone(pool_lookup_multiname(pool, swf_GetU30(tag)));
799 //e->var_name = pool_lookup_string(pool, swf_GetU30(tag));
800 //if(e->var_name) e->var_name = strdup(e->var_name);
801 list_append(c->exceptions, e);
803 codelookup_free(codelookup);
804 c->traits = traits_parse(tag, pool, file);
806 DEBUG printf("method_body %d) (method %d), %d bytes of code\n", t, methodnr, code_length);
808 array_append(file->method_bodies, NO_KEY, c);
810 if(tag->len - tag->pos) {
811 fprintf(stderr, "%d unparsed bytes remaining in ABC block\n", tag->len - tag->pos);
815 swf_SetTagPos(tag, classes_pos);
816 for(t=0;t<num_classes;t++) {
817 abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
819 int classname_index = swf_GetU30(tag);
820 int superclass_index = swf_GetU30(tag);
821 cls->classname = multiname_clone(pool_lookup_multiname(pool, classname_index));
822 cls->superclass = multiname_clone(pool_lookup_multiname(pool, superclass_index));
823 cls->flags = swf_GetU8(tag);
826 int ns_index = swf_GetU30(tag);
827 cls->protectedNS = namespace_clone(pool_lookup_namespace(pool, ns_index));
830 int num_interfaces = swf_GetU30(tag); //interface count
832 for(s=0;s<num_interfaces;s++) {
835 int iinit = swf_GetU30(tag);
836 cls->constructor = (abc_method_t*)array_getvalue(file->methods, iinit);
837 cls->traits = traits_parse(tag, pool, file);
839 for(t=0;t<num_classes;t++) {
840 abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
842 swf_GetU30(tag); // cindex
843 cls->static_traits = traits_parse(tag, pool, file);
845 int num_scripts2 = swf_GetU30(tag);
846 for(t=0;t<num_scripts2;t++) {
847 int init = swf_GetU30(tag);
848 abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, init);
850 abc_script_t*s = malloc(sizeof(abc_script_t));
851 memset(s, 0, sizeof(abc_script_t));
853 s->traits = traits_parse(tag, pool, file);
854 array_append(file->scripts, NO_KEY, s);
861 void swf_WriteABC(TAG*abctag, void*code)
863 abc_file_t*file = (abc_file_t*)code;
864 pool_t*pool = pool_new();
866 TAG*tmp = swf_InsertTag(0,0);
870 /* add method bodies where needed */
871 for(t=0;t<file->classes->num;t++) {
872 abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
873 if(!c->constructor) {
874 if(!(c->flags&CLASS_INTERFACE)) {
875 NEW(abc_method_t,m);array_append(file->methods, NO_KEY, m);
876 NEW(abc_method_body_t,body);array_append(file->method_bodies, NO_KEY, body);
877 body->method = m; m->body = body;
881 NEW(abc_method_t,m);array_append(file->methods, NO_KEY, m);
885 if(!c->static_constructor) {
886 NEW(abc_method_t,m);array_append(file->methods, NO_KEY, m);
887 NEW(abc_method_body_t,body);array_append(file->method_bodies, NO_KEY, body);
888 body->method = m; m->body = body;
890 c->static_constructor = m;
895 swf_SetU30(tag, file->methods->num);
896 /* enumerate classes, methods and method bodies */
897 for(t=0;t<file->methods->num;t++) {
898 abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, t);
901 for(t=0;t<file->classes->num;t++) {
902 abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
905 for(t=0;t<file->method_bodies->num;t++) {
906 abc_method_body_t*m = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
910 /* generate code statistics */
911 for(t=0;t<file->method_bodies->num;t++) {
912 abc_method_body_t*m = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
913 m->stats = code_get_statistics(m->code, m->exceptions);
916 /* level init scope depths: The init scope depth of a method is
917 always as least as high as the init scope depth of it's surrounding
919 A method has it's own init_scope_depth if it's an init method
920 (then its init scope depth is zero), or if it's used as a closure.
922 Not sure yet what to do with methods which are used at different
923 locations- e.g. the nullmethod is used all over the place.
924 EDIT: flashplayer doesn't allow this anyway- a method can only
927 Also, I have the strong suspicion that flash player uses only
928 the difference between max_scope_stack and init_scope_stack, anyway.
930 for(t=0;t<file->classes->num;t++) {
931 abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
932 trait_list_t*traits = c->traits;
933 if(c->constructor && c->constructor->body &&
934 c->constructor->body->init_scope_depth < c->init_scope_depth) {
935 c->constructor->body->init_scope_depth = c->init_scope_depth;
937 if(c->static_constructor && c->static_constructor->body &&
938 c->static_constructor->body->init_scope_depth < c->init_scope_depth) {
939 c->static_constructor->body->init_scope_depth = c->init_scope_depth;
942 trait_t*trait = traits->trait;
943 if(trait_is_method(trait) && trait->method->body) {
944 abc_method_body_t*body = trait->method->body;
945 if(body->init_scope_depth < c->init_scope_depth) {
946 body->init_scope_depth = c->init_scope_depth;
949 traits = traits->next;
953 for(t=0;t<file->methods->num;t++) {
954 abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, t);
956 multiname_list_t*l = m->parameters;
957 int num_params = list_length(m->parameters);
958 swf_SetU30(tag, num_params);
960 swf_SetU30(tag, pool_register_multiname(pool, m->return_type));
965 swf_SetU30(tag, pool_register_multiname(pool, l->multiname));
969 swf_SetU30(tag, pool_register_string(pool, m->name));
974 U8 flags = m->flags&(METHOD_NEED_REST|METHOD_NEED_ARGUMENTS);
975 if(m->optional_parameters)
976 flags |= METHOD_HAS_OPTIONAL;
978 flags |= m->body->stats->flags;
981 swf_SetU8(tag, flags);
982 if(flags&METHOD_HAS_OPTIONAL) {
983 swf_SetU30(tag, list_length(m->optional_parameters));
984 constant_list_t*l = m->optional_parameters;
986 swf_SetU30(tag, constant_get_index(pool, l->constant));
987 swf_SetU8(tag, l->constant->type);
994 swf_SetU30(tag, file->metadata->num);
995 for(t=0;t<file->metadata->num;t++) {
996 const char*entry_name = array_getkey(file->metadata, t);
997 swf_SetU30(tag, pool_register_string(pool, entry_name));
998 array_t*items = (array_t*)array_getvalue(file->metadata, t);
999 swf_SetU30(tag, items->num);
1001 for(s=0;s<items->num;s++) {
1002 int i1 = pool_register_string(pool, array_getkey(items, s));
1003 int i2 = pool_register_string(pool, array_getvalue(items, s));
1004 swf_SetU30(tag, i1);
1005 swf_SetU30(tag, i2);
1009 swf_SetU30(tag, file->classes->num);
1010 for(t=0;t<file->classes->num;t++) {
1011 abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
1013 int classname_index = pool_register_multiname(pool, c->classname);
1014 int superclass_index = pool_register_multiname(pool, c->superclass);
1016 swf_SetU30(tag, classname_index);
1017 swf_SetU30(tag, superclass_index);
1019 swf_SetU8(tag, c->flags); // flags
1021 int ns_index = pool_register_namespace(pool, c->protectedNS);
1022 swf_SetU30(tag, ns_index);
1025 swf_SetU30(tag, list_length(c->interfaces));
1026 multiname_list_t*interface= c->interfaces;
1028 swf_SetU30(tag, pool_register_multiname(pool, interface->multiname));
1029 interface = interface->next;
1032 assert(c->constructor);
1033 swf_SetU30(tag, c->constructor->index);
1035 traits_write(pool, tag, c->traits);
1037 for(t=0;t<file->classes->num;t++) {
1038 abc_class_t*c = (abc_class_t*)array_getvalue(file->classes, t);
1039 assert(c->static_constructor);
1040 swf_SetU30(tag, c->static_constructor->index);
1042 traits_write(pool, tag, c->static_traits);
1045 swf_SetU30(tag, file->scripts->num);
1046 for(t=0;t<file->scripts->num;t++) {
1047 abc_script_t*s = (abc_script_t*)array_getvalue(file->scripts, t);
1048 swf_SetU30(tag, s->method->index); //!=t!
1049 traits_write(pool, tag, s->traits);
1052 swf_SetU30(tag, file->method_bodies->num);
1053 for(t=0;t<file->method_bodies->num;t++) {
1054 abc_method_body_t*c = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1055 abc_method_t*m = c->method;
1056 swf_SetU30(tag, m->index);
1058 //swf_SetU30(tag, c->old.max_stack);
1059 //swf_SetU30(tag, c->old.local_count);
1060 //swf_SetU30(tag, c->old.init_scope_depth);
1061 //swf_SetU30(tag, c->old.max_scope_depth);
1063 swf_SetU30(tag, c->stats->max_stack);
1064 if(list_length(c->method->parameters)+1 <= c->stats->local_count)
1065 swf_SetU30(tag, c->stats->local_count);
1067 swf_SetU30(tag, list_length(c->method->parameters)+1);
1068 swf_SetU30(tag, c->init_scope_depth);
1069 swf_SetU30(tag, c->stats->max_scope_depth+
1070 c->init_scope_depth);
1072 code_write(tag, c->code, pool, file);
1074 swf_SetU30(tag, list_length(c->exceptions));
1075 abc_exception_list_t*l = c->exceptions;
1077 // warning: assumes "pos" in each code_t is up-to-date
1078 swf_SetU30(tag, l->abc_exception->from->pos);
1079 swf_SetU30(tag, l->abc_exception->to->pos);
1080 swf_SetU30(tag, l->abc_exception->target->pos);
1081 swf_SetU30(tag, pool_register_multiname(pool, l->abc_exception->exc_type));
1082 swf_SetU30(tag, pool_register_multiname(pool, l->abc_exception->var_name));
1086 traits_write(pool, tag, c->traits);
1089 /* free temporary codestat data again. Notice: If we were to write this
1090 file multiple times, this can also be shifted to abc_file_free() */
1091 for(t=0;t<file->method_bodies->num;t++) {
1092 abc_method_body_t*m = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1093 codestats_free(m->stats);m->stats=0;
1096 // --- start to write real tag --
1100 if(tag->id == ST_DOABC) {
1101 swf_SetU32(tag, file->flags); // flags
1102 swf_SetString(tag, file->name);
1105 swf_SetU16(tag, 0x10); //version
1106 swf_SetU16(tag, 0x2e);
1108 pool_write(pool, tag);
1110 swf_SetBlock(tag, tmp->data, tmp->len);
1112 swf_DeleteTag(0, tmp);
1116 void abc_file_free(abc_file_t*file)
1119 if(file->metadata) {
1120 for(t=0;t<file->metadata->num;t++) {
1121 array_t*items = (array_t*)array_getvalue(file->metadata, t);
1123 for(s=0;s<items->num;s++) {
1124 free(array_getvalue(items, s));
1128 array_free(file->metadata);file->metadata=0;
1131 for(t=0;t<file->methods->num;t++) {
1132 abc_method_t*m = (abc_method_t*)array_getvalue(file->methods, t);
1134 multiname_list_t*param = m->parameters;
1136 multiname_destroy(param->multiname);param->multiname=0;
1137 param = param->next;
1139 list_free(m->parameters);m->parameters=0;
1141 constant_list_t*opt = m->optional_parameters;
1143 constant_free(opt->constant);opt->constant=0;
1146 list_free(m->optional_parameters);m->optional_parameters=0;
1149 free((void*)m->name);m->name=0;
1151 if(m->return_type) {
1152 multiname_destroy(m->return_type);
1156 array_free(file->methods);file->methods=0;
1158 for(t=0;t<file->classes->num;t++) {
1159 abc_class_t*cls = (abc_class_t*)array_getvalue(file->classes, t);
1160 traits_free(cls->traits);cls->traits=0;
1161 traits_free(cls->static_traits);cls->static_traits=0;
1163 if(cls->classname) {
1164 multiname_destroy(cls->classname);
1166 if(cls->superclass) {
1167 multiname_destroy(cls->superclass);
1170 multiname_list_t*i = cls->interfaces;
1172 multiname_destroy(i->multiname);i->multiname=0;
1175 list_free(cls->interfaces);cls->interfaces=0;
1177 if(cls->protectedNS) {
1178 namespace_destroy(cls->protectedNS);
1182 array_free(file->classes);file->classes=0;
1184 for(t=0;t<file->scripts->num;t++) {
1185 abc_script_t*s = (abc_script_t*)array_getvalue(file->scripts, t);
1186 traits_free(s->traits);s->traits=0;
1189 array_free(file->scripts);file->scripts=0;
1191 for(t=0;t<file->method_bodies->num;t++) {
1192 abc_method_body_t*body = (abc_method_body_t*)array_getvalue(file->method_bodies, t);
1193 code_free(body->code);body->code=0;
1194 traits_free(body->traits);body->traits=0;
1196 abc_exception_list_t*ee = body->exceptions;
1198 abc_exception_t*e=ee->abc_exception;ee->abc_exception=0;
1199 e->from = e->to = e->target = 0;
1200 multiname_destroy(e->exc_type);e->exc_type=0;
1201 multiname_destroy(e->var_name);e->var_name=0;
1205 list_free(body->exceptions);body->exceptions=0;
1209 array_free(file->method_bodies);file->method_bodies=0;
1212 free((void*)file->name);file->name=0;
1218 void swf_FreeABC(void*code)
1220 abc_file_t*file= (abc_file_t*)code;
1221 abc_file_free(file);
1224 void swf_AddButtonLinks(SWF*swf, char stop_each_frame, char events)
1227 int has_buttons = 0;
1228 TAG*tag=swf->firstTag;
1230 if(tag->id == ST_SHOWFRAME)
1232 if(tag->id == ST_DEFINEBUTTON || tag->id == ST_DEFINEBUTTON2)
1237 abc_file_t*file = abc_file_new();
1238 abc_method_body_t*c = 0;
1240 abc_class_t*cls = abc_class_new2(file, "rfx::MainTimeline", "flash.display::MovieClip");
1241 abc_class_protectedNS(cls, "rfx:MainTimeline");
1243 TAG*abctag = swf_InsertTagBefore(swf, swf->firstTag, ST_DOABC);
1245 tag = swf_InsertTag(abctag, ST_SYMBOLCLASS);
1248 swf_SetString(tag, "rfx.MainTimeline");
1250 c = abc_class_staticconstructor(cls, 0, 0);
1251 c->old.max_stack = 1;
1252 c->old.local_count = 1;
1253 c->old.init_scope_depth = 9;
1254 c->old.max_scope_depth = 10;
1260 c = abc_class_constructor(cls, 0, 0);
1261 c->old.max_stack = 3;
1262 c->old.local_count = 1;
1263 c->old.init_scope_depth = 10;
1264 c->old.max_scope_depth = 11;
1266 debugfile(c, "constructor.as");
1272 __ constructsuper(c,0);
1274 __ getlex(c, "[package]flash.system::Security");
1275 __ pushstring(c, "*");
1276 __ callpropvoid(c, "[package]::allowDomain", 1);
1278 if(stop_each_frame || has_buttons) {
1280 tag = swf->firstTag;
1281 abc_method_body_t*f = 0; //frame script
1282 while(tag && tag->id!=ST_END) {
1284 char needs_framescript=0;
1285 char buttonname[80];
1286 char functionname[80];
1287 sprintf(framename, "[packageinternal]rfx::frame%d", frame);
1289 if(!f && (tag->id == ST_DEFINEBUTTON || tag->id == ST_DEFINEBUTTON2 || stop_each_frame)) {
1290 /* make the contructor add a frame script */
1291 __ findpropstrict(c,"[package]::addFrameScript");
1292 __ pushbyte(c,frame);
1293 __ getlex(c,framename);
1294 __ callpropvoid(c,"[package]::addFrameScript",2);
1296 f = abc_class_method(cls, 0, framename, 0);
1297 f->old.max_stack = 3;
1298 f->old.local_count = 1;
1299 f->old.init_scope_depth = 10;
1300 f->old.max_scope_depth = 11;
1301 __ debugfile(f, "framescript.as");
1305 if(stop_each_frame) {
1306 __ findpropstrict(f, "[package]::stop");
1307 __ callpropvoid(f, "[package]::stop", 0);
1311 if(tag->id == ST_DEFINEBUTTON || tag->id == ST_DEFINEBUTTON2) {
1312 U16 id = swf_GetDefineID(tag);
1313 sprintf(buttonname, "::button%d", swf_GetDefineID(tag));
1314 __ getlex(f,buttonname);
1315 __ getlex(f,"flash.events::MouseEvent");
1316 __ getproperty(f, "::CLICK");
1317 sprintf(functionname, "::clickbutton%d", swf_GetDefineID(tag));
1318 __ getlex(f,functionname);
1319 __ callpropvoid(f, "::addEventListener" ,2);
1321 needs_framescript = 1;
1323 abc_method_body_t*h =
1324 abc_class_method(cls, 0, functionname, 1, "flash.events::MouseEvent");
1325 h->old.max_stack = 6;
1326 h->old.local_count = 2;
1327 h->old.init_scope_depth = 10;
1328 h->old.max_scope_depth = 11;
1332 ActionTAG*oldaction = swf_ButtonGetAction(tag);
1333 if(oldaction && oldaction->op == ACTION__GOTOFRAME) {
1334 int framenr = GET16(oldaction->data);
1336 fprintf(stderr, "Warning: Couldn't translate jump to frame %d to flash 9 actionscript\n", framenr);
1339 __ findpropstrict(h,"[package]::gotoAndStop");
1340 __ pushbyte(h,framenr+1);
1341 __ callpropvoid(h,"[package]::gotoAndStop", 1);
1344 sprintf(framename, "frame%d", framenr);
1345 __ getlocal_0(h); //this
1346 __ findpropstrict(h, "[package]flash.events::TextEvent");
1347 __ pushstring(h, "link");
1350 __ pushstring(h, framename);
1351 __ constructprop(h,"[package]flash.events::TextEvent", 4);
1352 __ callpropvoid(h,"[package]::dispatchEvent", 1);
1354 } else if(oldaction && oldaction->op == ACTION__GETURL) {
1356 __ findpropstrict(h,"flash.net::navigateToURL");
1357 __ findpropstrict(h,"flash.net::URLRequest");
1358 // TODO: target _blank
1359 __ pushstring(h,oldaction->data); //url
1360 __ constructprop(h,"flash.net::URLRequest", 1);
1361 __ callpropvoid(h,"flash.net::navigateToURL", 1);
1363 __ getlocal_0(h); //this
1364 __ findpropstrict(h, "[package]flash.events::TextEvent");
1365 __ pushstring(h, "link");
1368 __ pushstring(h,oldaction->data); //url
1369 __ constructprop(h,"[package]flash.events::TextEvent", 4);
1370 __ callpropvoid(h,"[package]::dispatchEvent", 1);
1372 } else if(oldaction) {
1373 fprintf(stderr, "Warning: Couldn't translate button code of button %d to flash 9 abc action\n", id);
1376 swf_ActionFree(oldaction);
1378 if(tag->id == ST_SHOWFRAME) {
1393 tag = swf->firstTag;
1395 if(tag->id == ST_DEFINEBUTTON || tag->id == ST_DEFINEBUTTON2) {
1396 char buttonname[80];
1397 sprintf(buttonname, "::button%d", swf_GetDefineID(tag));
1398 multiname_t*s = multiname_fromstring(buttonname);
1399 abc_class_slot(cls, buttonname, s);
1405 abc_script_t*s = abc_initscript(file, 0, 0);
1406 c = s->method->body;
1407 c->old.max_stack = 2;
1408 c->old.local_count = 1;
1409 c->old.init_scope_depth = 1;
1410 c->old.max_scope_depth = 9;
1414 __ getscopeobject(c, 0);
1415 __ getlex(c,"::Object");
1417 __ getlex(c,"flash.events::EventDispatcher");
1419 __ getlex(c,"flash.display::DisplayObject");
1421 __ getlex(c,"flash.display::InteractiveObject");
1423 __ getlex(c,"flash.display::DisplayObjectContainer");
1425 __ getlex(c,"flash.display::Sprite");
1427 __ getlex(c,"flash.display::MovieClip");
1429 __ getlex(c,"flash.display::MovieClip");
1438 __ initproperty(c,"rfx::MainTimeline");
1441 //abc_method_body_addClassTrait(c, "rfx:MainTimeline", 1, cls);
1442 multiname_t*classname = multiname_fromstring("rfx::MainTimeline");
1443 abc_initscript_addClassTrait(s, classname, cls);
1444 multiname_destroy(classname);
1446 swf_WriteABC(abctag, file);