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 "common.h"
  27 #include "tokenizer.h"
  28 #include "../os.h"
  29
  30 static void import_code(void*_abc, char*filename, int pass);
  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);
  40     import_code(abc, filename, 1);
  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     TAG*tag = swf->firstTag;
  52
  53     /* pass 1 */
  54     while(tag) {
  55         if(tag->id == ST_DOABC || tag->id == ST_RAWABC) {
  56             abc_file_t*abc = swf_ReadABC(tag);
  57             import_code(abc, filename, 0);
  58             swf_FreeABC(abc);
  59         }
  60         tag = tag->next;
  61     }
  62
  63     tag = swf->firstTag;
  64     /* pass 2 */
  65     while(tag) {
  66         if(tag->id == ST_DOABC || tag->id == ST_RAWABC) {
  67             abc_file_t*abc = swf_ReadABC(tag);
  68             import_code(abc, filename, 1);
  69             swf_FreeABC(abc);
  70         }
  71         tag = tag->next;
  72     }
  73
  74     swf_FreeTags(swf);
  75     free(swf);
  76 }
  77
  78 void as3_import_file(char*filename)
  79 {
  80     FILE*fi = fopen(filename, "rb");
  81     if(!fi) return;
  82     char head[3];
  83     fread(head, 3, 1, fi);
  84     fclose(fi);
  85     if(!strncmp(head, "FWS", 3) ||
  86        !strncmp(head, "CWS", 3)) {
  87         as3_import_swf(filename);
  88     } else {
  89         as3_import_abc(filename);
  90     }
  91 }
  92
  93 static int compare_traits(const void*v1, const void*v2)
  94 {
  95     trait_t* x1 = *(trait_t**)v1;
  96     trait_t* x2 = *(trait_t**)v2;
  97     int i = strcmp(x1->name->ns->name, x2->name->ns->name);
  98     if(i)
  99         return i;
 100     return strcmp(x1->name->name, x2->name->name);
 101 }
 102
 103 static classinfo_t*resolve_class(char*filename, char*what, multiname_t*n)
 104 {
 105     if(!n) return 0;
 106     if(!n->name[0] || !strcmp(n->name, "void")) return 0;
 107
 108     classinfo_t*c = 0;
 109     if(n->ns && n->ns->name) {
 110         c = (classinfo_t*)registry_find(n->ns->name, n->name);
 111     } else if(n->namespace_set) {
 112         namespace_list_t*s = n->namespace_set->namespaces;
 113         while(s) {
 114             c = (classinfo_t*)registry_find(s->namespace->name, n->name);
 115             if(c)
 116                 break;
 117             s = s->next;
 118         }
 119     }
 120
 121     if(!c) {
 122         as3_warning("import %s: couldn't resolve %s %s.%s", filename, what, n->ns->name, n->name);
 123         return 0;
 124     }
 125     if(c->kind != INFOTYPE_CLASS)
 126         as3_warning("import %s: %s %s resolves to something that's not a class", filename, what, n->name);
 127     return c;
 128 }
 129
 130 static void import_code(void*_abc, char*filename, int pass)
 131 {
 132     abc_file_t*abc = _abc;
 133     int t;
 134     if(pass==0) {
 135         for(t=0;t<abc->classes->num;t++) {
 136             abc_class_t*cls = array_getvalue(abc->classes, t);
 137             U8 access = cls->classname->ns->access;
 138             if(access==ACCESS_PRIVATE ||
 139                access==ACCESS_PACKAGEINTERNAL)
 140                 continue;
 141             //if(!strncmp(cls->classname->ns->name, "__AS3", 5))
 142             //    continue;
 143
 144             const char*package = strdup(cls->classname->ns->name);
 145             const char*name = strdup(cls->classname->name);
 146
 147             multiname_list_t*i=cls->interfaces;
 148             classinfo_t*c = classinfo_register(access, package, name, list_length(i));
 149             c->flags|=FLAG_BUILTIN;
 150
 151             if(cls->flags & CLASS_FINAL)
 152                 c->flags |= FLAG_FINAL;
 153             if(cls->flags & CLASS_INTERFACE)
 154                 c->flags |= FLAG_INTERFACE;
 155             if(!(cls->flags & CLASS_SEALED))
 156                 c->flags |= FLAG_DYNAMIC;
 157         }
 158         return;
 159     }
 160
 161     for(t=0;t<abc->classes->num;t++) {
 162         abc_class_t*cls = array_getvalue(abc->classes, t);
 163         const char*package = strdup(cls->classname->ns->name);
 164         const char*name = strdup(cls->classname->name);
 165         classinfo_t*c = (classinfo_t*)registry_find(package, name);
 166         if(!c) continue;
 167
 168         int nr = 0;
 169         multiname_list_t*i = cls->interfaces;
 170         while(i) {
 171             c->interfaces[nr++] = resolve_class(filename, "interface", i->multiname);
 172             i = i->next;
 173         }
 174         c->superclass = resolve_class(filename, "superclass", cls->superclass);
 175
 176         trait_list_t*l=0;
 177         char is_static = 0;
 178         l = cls->traits;
 179         if(!l) {
 180             l = cls->static_traits;
 181             is_static = 1;
 182         }
 183         dict_t*names = dict_new();
 184         while(l) {
 185             trait_t*trait = l->trait;
 186             U8 access = trait->name->ns->access;
 187
 188             if(access==ACCESS_PRIVATE)
 189                 goto cont;
 190             const char*name = trait->name->name;
 191             char* ns= ACCESS_NAMESPACE?strdup(trait->name->ns->name):"";
 192             if(registry_findmember(c, ns, name, 0))
 193                 goto cont;
 194             name = strdup(name);
 195
 196             memberinfo_t*s = 0;
 197             if(trait->kind == TRAIT_METHOD) {
 198                 s = (memberinfo_t*)methodinfo_register_onclass(c, access, ns, name);
 199                 s->return_type = resolve_class(filename, "return type", trait->method->return_type);
 200                 dict_put(names, name, 0);
 201             } else if(trait->kind == TRAIT_SLOT) {
 202                 s = (memberinfo_t*)varinfo_register_onclass(c, access, ns, name);
 203                 s->type = resolve_class(filename, "type", trait->type_name);
 204                 dict_put(names, name, 0);
 205             } else if(trait->kind == TRAIT_GETTER) {
 206                 s = (memberinfo_t*)varinfo_register_onclass(c, access, ns, name);
 207                 s->type = resolve_class(filename, "type", trait->method->return_type);
 208                 dict_put(names, name, 0);
 209             } else if(trait->kind == TRAIT_CONST) {
 210                 /* some variables (e.g. XML.length) are apparently both a method and a slot.
 211                    needs split of static/non-static first */
 212                 if(!dict_contains(names, name)) {
 213                     varinfo_t*v = (varinfo_t*)varinfo_register_onclass(c, access, ns, name);
 214                     v->type = resolve_class(filename, "type", trait->type_name);
 215                     v->flags |= FLAG_CONST;
 216                     /* leave this alone for now- it blows up the file too much
 217                     v->value = constant_clone(trait->value);*/
 218                     s = (memberinfo_t*)v;
 219                     dict_put(names, name, 0);
 220                 } else
 221                     goto cont;
 222
 223             } else {
 224                 goto cont;
 225             }
 226
 227             s->flags = is_static?FLAG_STATIC:0;
 228             s->flags |= FLAG_BUILTIN;
 229             s->parent = c;
 230
 231             cont:
 232             l = l->next;
 233             if(!l && !is_static) {
 234                 l = cls->static_traits;
 235                 is_static = 1;
 236             }
 237         }
 238         dict_destroy(names);
 239     }
 240
 241 #   define IS_PUBLIC_MEMBER(trait) ((trait)->kind != TRAIT_CLASS && (trait)->name->ns->access != ACCESS_PRIVATE)
 242
 243     /* count public functions */
 244     int num_methods=0;
 245     for(t=0;t<abc->scripts->num;t++) {
 246         trait_list_t*l = ((abc_script_t*)array_getvalue(abc->scripts, t))->traits;
 247         for(;l;l=l->next) {
 248             num_methods += IS_PUBLIC_MEMBER(l->trait);
 249         }
 250     }
 251     trait_t**traits = (trait_t**)malloc(num_methods*sizeof(trait_t*));
 252     num_methods=0;
 253     for(t=0;t<abc->scripts->num;t++) {
 254         trait_list_t*l = ((abc_script_t*)array_getvalue(abc->scripts, t))->traits;
 255         for(;l;l=l->next) {
 256             if(IS_PUBLIC_MEMBER(l->trait)) {
 257                 traits[num_methods++] = l->trait;
 258             }
 259         }
 260     }
 261     qsort(traits, num_methods, sizeof(trait_t*), compare_traits);
 262     for(t=0;t<num_methods;t++) {
 263         trait_t*trait = traits[t];
 264         if(IS_PUBLIC_MEMBER(trait)) {
 265             U8 access = trait->name->ns->access;
 266             const char*package = strdup(trait->name->ns->name);
 267             const char*name = strdup(trait->name->name);
 268             char np = 0;
 269             memberinfo_t*m = 0;
 270             if(trait->kind == TRAIT_METHOD) {
 271                 m = (memberinfo_t*)methodinfo_register_global(access, package, name);
 272                 m->return_type = resolve_class(filename, "return type", trait->method->return_type);
 273             } else {
 274                 varinfo_t*v = varinfo_register_global(access, package, name);
 275                 v->type = resolve_class(filename, "type", trait->type_name);
 276                 v->value = constant_clone(trait->value);
 277                 v->flags |= trait->kind==TRAIT_CONST?FLAG_CONST:0;
 278                 m = (memberinfo_t*)v;
 279             }
 280             m->flags |= FLAG_BUILTIN;
 281             m->parent = 0;
 282         }
 283     }
 284 }
 285
 286 void as3_import_code(void*_abc)
 287 {
 288     import_code(_abc, "", 0);
 289     import_code(_abc, "", 1);
 290 }