lib/as3/import.c

   1 /* import.c
   2
   3    Extension module for the rfxswf library.
   4    Part of the swftools package.
   5
   6    Copyright (c) 2009 Matthias Kramm <kramm@quiss.org>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  21
  22 #include "import.h"
  23 #include "abc.h"
  24 #include "registry.h"
  25 #include "common.h"
  26 #include "tokenizer.h"
  27 #include "assets.h"
  28 #include "../os.h"
  29
  30 static void import_code(void*_abc, char*filename, int pass, asset_bundle_t*a);
  31
  32 void as3_import_abc(char*filename)
  33 {
  34     TAG*tag = swf_InsertTag(0, ST_RAWABC);
  35     memfile_t*file = memfile_open(filename);
  36     tag->data = file->data;
  37     tag->len = file->len;
  38     abc_file_t*abc = swf_ReadABC(tag);
  39     import_code(abc, filename, 0, 0);
  40     import_code(abc, filename, 1, 0);
  41     swf_FreeABC(abc);
  42     memfile_close(file);
  43     free(tag);
  44 }
  45
  46 void as3_import_swf(char*filename)
  47 {
  48     SWF* swf = swf_OpenSWF(filename);
  49     if(!swf)
  50         return;
  51     swf_FoldAll(swf);
  52
  53     TAG*tag = swf->firstTag;
  54
  55     asset_resolver_t* assets =  swf_ParseAssets(swf);
  56
  57     /* pass 1 */
  58     while(tag) {
  59         if(tag->id == ST_DOABC || tag->id == ST_RAWABC) {
  60             abc_file_t*abc = swf_ReadABC(tag);
  61             import_code(abc, filename, 0, 0);
  62             swf_FreeABC(abc);
  63         }
  64         tag = tag->next;
  65     }
  66
  67     tag = swf->firstTag;
  68     /* pass 2 */
  69     while(tag) {
  70         if(tag->id == ST_DOABC || tag->id == ST_RAWABC) {
  71             abc_file_t*abc = swf_ReadABC(tag); //FIXME: mem leak
  72             swf_ResolveAssets(assets, abc);
  73             NEW(asset_bundle_t, a);
  74             a->file = abc;
  75             registry_add_asset(a);
  76             import_code(abc, filename, 1, a);
  77         }
  78         tag = tag->next;
  79     }
  80
  81     //swf_FreeTags(swf); // FIXME: mem leak
  82     free(swf);
  83
  84 }
  85
  86 void as3_import_file(char*filename)
  87 {
  88     FILE*fi = fopen(filename, "rb");
  89     if(!fi) return;
  90     char head[3];
  91     fread(head, 3, 1, fi);
  92     fclose(fi);
  93     if(!strncmp(head, "FWS", 3) ||
  94        !strncmp(head, "CWS", 3)) {
  95         as3_import_swf(filename);
  96     } else {
  97         as3_import_abc(filename);
  98     }
  99 }
 100
 101 static int compare_traits(const void*v1, const void*v2)
 102 {
 103     trait_t* x1 = *(trait_t**)v1;
 104     trait_t* x2 = *(trait_t**)v2;
 105     int i = strcmp(x1->name->ns->name, x2->name->ns->name);
 106     if(i)
 107         return i;
 108     return strcmp(x1->name->name, x2->name->name);
 109 }
 110
 111 static classinfo_t*resolve_class(char*filename, char*what, multiname_t*n)
 112 {
 113     if(!n) return 0;
 114     if(!n->name[0]) return 0;
 115     if(!strcmp(n->name, "void"))
 116         return &voidclass;
 117
 118     classinfo_t*c = 0;
 119     if(n->ns && n->ns->name) {
 120         c = (classinfo_t*)registry_find(n->ns->name, n->name);
 121     } else if(n->namespace_set) {
 122         namespace_list_t*s = n->namespace_set->namespaces;
 123         while(s) {
 124             c = (classinfo_t*)registry_find(s->namespace->name, n->name);
 125             if(c)
 126                 break;
 127             s = s->next;
 128         }
 129     }
 130
 131     if(!c) {
 132         as3_warning("import %s: couldn't resolve %s %s.%s", filename, what, n->ns->name, n->name);
 133         return 0;
 134     }
 135     if(c->kind != INFOTYPE_CLASS)
 136         as3_warning("import %s: %s %s resolves to something that's not a class", filename, what, n->name);
 137     return c;
 138 }
 139
 140 static void import_code(void*_abc, char*filename, int pass, asset_bundle_t*asset_bundle)
 141 {
 142     abc_file_t*abc = _abc;
 143     int t;
 144     if(pass==0) {
 145         for(t=0;t<abc->classes->num;t++) {
 146             abc_class_t*cls = array_getvalue(abc->classes, t);
 147             U8 access = cls->classname->ns->access;
 148             if(access==ACCESS_PRIVATE ||
 149                access==ACCESS_PACKAGEINTERNAL)
 150                 continue;
 151             //if(!strncmp(cls->classname->ns->name, "__AS3", 5))
 152             //    continue;
 153
 154             const char*package = strdup(cls->classname->ns->name);
 155             const char*name = strdup(cls->classname->name);
 156
 157             multiname_list_t*i=cls->interfaces;
 158             classinfo_t*c = classinfo_register(access, package, name, list_length(i));
 159             c->flags|=FLAG_ASSET;
 160
 161             if(cls->flags & CLASS_FINAL)
 162                 c->flags |= FLAG_FINAL;
 163             if(cls->flags & CLASS_INTERFACE)
 164                 c->flags |= FLAG_INTERFACE;
 165             if(!(cls->flags & CLASS_SEALED))
 166                 c->flags |= FLAG_DYNAMIC;
 167         }
 168         return;
 169     }
 170
 171     for(t=0;t<abc->classes->num;t++) {
 172         abc_class_t*cls = array_getvalue(abc->classes, t);
 173         const char*package = strdup(cls->classname->ns->name);
 174         const char*name = strdup(cls->classname->name);
 175         classinfo_t*c = (classinfo_t*)registry_find(package, name);
 176         if(!c) continue;
 177
 178         if(cls->asset) {
 179             c->assets = asset_bundle;
 180         }
 181
 182         int nr = 0;
 183         multiname_list_t*i = cls->interfaces;
 184         while(i) {
 185             c->interfaces[nr++] = resolve_class(filename, "interface", i->multiname);
 186             i = i->next;
 187         }
 188         c->superclass = resolve_class(filename, "superclass", cls->superclass);
 189
 190         trait_list_t*l=0;
 191         char is_static = 0;
 192         l = cls->traits;
 193         if(!l) {
 194             l = cls->static_traits;
 195             is_static = 1;
 196         }
 197         dict_t*names = dict_new();
 198         while(l) {
 199             trait_t*trait = l->trait;
 200             U8 access = trait->name->ns->access;
 201
 202             if(access==ACCESS_PRIVATE)
 203                 goto cont;
 204             const char*name = trait->name->name;
 205             char* ns = access==ACCESS_NAMESPACE?strdup(trait->name->ns->name):"";
 206
 207             if(registry_findmember(c, ns, name, 0, is_static))
 208                 goto cont;
 209
 210             name = strdup(name);
 211
 212             memberinfo_t*s = 0;
 213             if(trait->kind == TRAIT_METHOD) {
 214                 s = (memberinfo_t*)methodinfo_register_onclass(c, access, ns, name, is_static);
 215                 s->return_type = resolve_class(filename, "return type", trait->method->return_type);
 216                 dict_put(names, name, 0);
 217             } else if(trait->kind == TRAIT_SLOT) {
 218                 s = (memberinfo_t*)varinfo_register_onclass(c, access, ns, name, is_static);
 219                 s->type = resolve_class(filename, "type", trait->type_name);
 220                 dict_put(names, name, 0);
 221             } else if(trait->kind == TRAIT_GETTER) {
 222                 s = (memberinfo_t*)varinfo_register_onclass(c, access, ns, name, is_static);
 223                 s->type = resolve_class(filename, "type", trait->method->return_type);
 224                 dict_put(names, name, 0);
 225             } else if(trait->kind == TRAIT_CONST) {
 226                 /* some variables (e.g. XML.length) are apparently both a method and a slot.
 227                    needs split of static/non-static first */
 228                 if(!dict_contains(names, name)) {
 229                     varinfo_t*v = (varinfo_t*)varinfo_register_onclass(c, access, ns, name, is_static);
 230                     v->type = resolve_class(filename, "type", trait->type_name);
 231                     v->flags |= FLAG_CONST;
 232                     /* leave this alone for now- it blows up the file too much
 233                     v->value = constant_clone(trait->value);*/
 234                     s = (memberinfo_t*)v;
 235                     dict_put(names, name, 0);
 236                 } else
 237                     goto cont;
 238
 239             } else {
 240                 goto cont;
 241             }
 242
 243             s->flags = is_static?FLAG_STATIC:0;
 244             s->flags |= FLAG_BUILTIN;
 245             s->parent = c;
 246
 247             cont:
 248             l = l->next;
 249             if(!l && !is_static) {
 250                 l = cls->static_traits;
 251                 is_static = 1;
 252             }
 253         }
 254         dict_destroy(names);
 255     }
 256
 257 #   define IS_PUBLIC_MEMBER(trait) ((trait)->kind != TRAIT_CLASS && (trait)->name->ns->access != ACCESS_PRIVATE)
 258
 259     /* count public functions */
 260     int num_methods=0;
 261     for(t=0;t<abc->scripts->num;t++) {
 262         trait_list_t*l = ((abc_script_t*)array_getvalue(abc->scripts, t))->traits;
 263         for(;l;l=l->next) {
 264             num_methods += IS_PUBLIC_MEMBER(l->trait);
 265         }
 266     }
 267     trait_t**traits = (trait_t**)malloc(num_methods*sizeof(trait_t*));
 268     num_methods=0;
 269     for(t=0;t<abc->scripts->num;t++) {
 270         trait_list_t*l = ((abc_script_t*)array_getvalue(abc->scripts, t))->traits;
 271         for(;l;l=l->next) {
 272             if(IS_PUBLIC_MEMBER(l->trait)) {
 273                 traits[num_methods++] = l->trait;
 274             }
 275         }
 276     }
 277     qsort(traits, num_methods, sizeof(trait_t*), compare_traits);
 278     for(t=0;t<num_methods;t++) {
 279         trait_t*trait = traits[t];
 280         if(IS_PUBLIC_MEMBER(trait)) {
 281             U8 access = trait->name->ns->access;
 282             const char*package = strdup(trait->name->ns->name);
 283             const char*name = strdup(trait->name->name);
 284             char np = 0;
 285             memberinfo_t*m = 0;
 286             if(trait->kind == TRAIT_METHOD) {
 287                 m = (memberinfo_t*)methodinfo_register_global(access, package, name);
 288                 m->return_type = resolve_class(filename, "return type", trait->method->return_type);
 289             } else {
 290                 varinfo_t*v = varinfo_register_global(access, package, name);
 291                 v->type = resolve_class(filename, "type", trait->type_name);
 292                 v->value = constant_clone(trait->value);
 293                 v->flags |= trait->kind==TRAIT_CONST?FLAG_CONST:0;
 294                 m = (memberinfo_t*)v;
 295             }
 296             m->flags |= FLAG_ASSET;
 297             m->parent = 0;
 298         }
 299     }
 300 }
 301
 302 void as3_import_code(void*_abc)
 303 {
 304     import_code(_abc, "", 0, 0);
 305     import_code(_abc, "", 1, 0);
 306 }