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 "tokenizer.h"
  26 #include "../os.h"
  27
  28 void as3_import_abc(char*filename)
  29 {
  30     TAG*tag = swf_InsertTag(0, ST_RAWABC);
  31     memfile_t*file = memfile_open(filename);
  32     tag->data = file->data;
  33     tag->len = file->len;
  34     abc_file_t*abc = swf_ReadABC(tag);
  35     as3_import_code(abc);
  36     swf_FreeABC(abc);
  37     memfile_close(file);
  38     free(tag);
  39 }
  40
  41 void as3_import_swf(char*filename)
  42 {
  43     SWF* swf = swf_OpenSWF(filename);
  44     if(!swf)
  45         return;
  46     TAG*tag = swf->firstTag;
  47     while(tag) {
  48         if(tag->id == ST_DOABC || tag->id == ST_RAWABC) {
  49             abc_file_t*abc = swf_ReadABC(tag);
  50             as3_import_code(abc);
  51             swf_FreeABC(abc);
  52         }
  53         tag = tag->next;
  54     }
  55     swf_FreeTags(swf);
  56     free(swf);
  57 }
  58
  59 void as3_import_file(char*filename)
  60 {
  61     FILE*fi = fopen(filename, "rb");
  62     if(!fi) return;
  63     char head[3];
  64     fread(head, 3, 1, fi);
  65     fclose(fi);
  66     if(!strncmp(head, "FWS", 3) ||
  67        !strncmp(head, "CWS", 3)) {
  68         as3_import_swf(filename);
  69     } else {
  70         as3_import_abc(filename);
  71     }
  72 }
  73
  74 static int compare_traits(const void*v1, const void*v2)
  75 {
  76     trait_t* x1 = *(trait_t**)v1;
  77     trait_t* x2 = *(trait_t**)v2;
  78     int i = strcmp(x1->name->ns->name, x2->name->ns->name);
  79     if(i)
  80         return i;
  81     return strcmp(x1->name->name, x2->name->name);
  82 }
  83
  84 static classinfo_t*resolve_class(char*what, multiname_t*n)
  85 {
  86     if(!n) return 0;
  87     if(!n->name[0] || !strcmp(n->name, "void")) return 0;
  88
  89     classinfo_t*c = 0;
  90     if(n->ns && n->ns->name) {
  91         c = (classinfo_t*)registry_find(n->ns->name, n->name);
  92     } else if(n->namespace_set) {
  93         namespace_list_t*s = n->namespace_set->namespaces;
  94         while(s) {
  95             c = (classinfo_t*)registry_find(s->namespace->name, n->name);
  96             if(c)
  97                 break;
  98             s = s->next;
  99         }
 100     }
 101
 102     if(!c) {
 103         as3_warning("import: couldn't resolve %s %s", what, n->name);
 104         return 0;
 105     }
 106     if(c->kind != INFOTYPE_CLASS)
 107         as3_warning("import: %s %s resolves to something that's not a class", what, n->name);
 108     return c;
 109 }
 110
 111 void as3_import_code(abc_file_t*abc)
 112 {
 113     int t;
 114     for(t=0;t<abc->classes->num;t++) {
 115         abc_class_t*cls = array_getvalue(abc->classes, t);
 116         U8 access = cls->classname->ns->access;
 117         if(access==ACCESS_PRIVATE ||
 118            access==ACCESS_PACKAGEINTERNAL)
 119             continue;
 120         //if(!strncmp(cls->classname->ns->name, "__AS3", 5))
 121         //    continue;
 122
 123         const char*package = strdup(cls->classname->ns->name);
 124         const char*name = strdup(cls->classname->name);
 125
 126         multiname_list_t*i=cls->interfaces;
 127         classinfo_t*c = classinfo_register(access, package, name, list_length(i));
 128         c->flags|=FLAG_BUILTIN;
 129
 130         if(cls->flags & CLASS_FINAL)
 131             c->flags |= FLAG_FINAL;
 132         if(cls->flags & CLASS_INTERFACE)
 133             c->flags |= FLAG_INTERFACE;
 134         if(!(cls->flags & CLASS_SEALED))
 135             c->flags |= FLAG_DYNAMIC;
 136     }
 137
 138     for(t=0;t<abc->classes->num;t++) {
 139         abc_class_t*cls = array_getvalue(abc->classes, t);
 140         const char*package = strdup(cls->classname->ns->name);
 141         const char*name = strdup(cls->classname->name);
 142         classinfo_t*c = (classinfo_t*)registry_find(package, name);
 143         if(!c) continue;
 144
 145         int nr = 0;
 146         multiname_list_t*i = cls->interfaces;
 147         while(i) {
 148             c->interfaces[nr++] = resolve_class("interface", i->multiname);
 149             i = i->next;
 150         }
 151         c->superclass = resolve_class("superclass", cls->superclass);
 152
 153         trait_list_t*l=0;
 154         char is_static = 0;
 155         l = cls->traits;
 156         while(l) {
 157             trait_t*trait = l->trait;
 158             U8 access = trait->name->ns->access;
 159             if(access==ACCESS_PRIVATE)
 160                 goto cont;
 161             const char*name = trait->name->name;
 162             char* ns= ACCESS_NAMESPACE?strdup(trait->name->ns->name):"";
 163             if(registry_findmember(c, ns, name, 0))
 164                 goto cont;
 165             name = strdup(name);
 166
 167             memberinfo_t*s = 0;
 168             if(trait->kind == TRAIT_METHOD) {
 169                 s = (memberinfo_t*)methodinfo_register_onclass(c, access, ns, name);
 170                 s->return_type = resolve_class("return type", trait->method->return_type);
 171             } else if(trait->kind == TRAIT_SLOT ||
 172                       trait->kind == TRAIT_GETTER) {
 173                 s = (memberinfo_t*)varinfo_register_onclass(c, access, ns, name);
 174                 s->type = resolve_class("type", trait->type_name);
 175             } else {
 176                 goto cont;
 177             }
 178
 179             s->flags = is_static?FLAG_STATIC:0;
 180             s->flags |= FLAG_BUILTIN;
 181             s->parent = c;
 182
 183             cont:
 184             l = l->next;
 185             if(!l && !is_static) {
 186                 l = cls->static_traits;
 187                 is_static = 1;
 188             }
 189         }
 190     }
 191
 192 #   define IS_PUBLIC_MEMBER(trait) ((trait)->kind != TRAIT_CLASS && (trait)->name->ns->access != ACCESS_PRIVATE)
 193
 194     /* count public functions */
 195     int num_methods=0;
 196     for(t=0;t<abc->scripts->num;t++) {
 197         trait_list_t*l = ((abc_script_t*)array_getvalue(abc->scripts, t))->traits;
 198         for(;l;l=l->next) {
 199             num_methods += IS_PUBLIC_MEMBER(l->trait);
 200         }
 201     }
 202     trait_t**traits = (trait_t**)malloc(num_methods*sizeof(trait_t*));
 203     num_methods=0;
 204     for(t=0;t<abc->scripts->num;t++) {
 205         trait_list_t*l = ((abc_script_t*)array_getvalue(abc->scripts, t))->traits;
 206         for(;l;l=l->next) {
 207             if(IS_PUBLIC_MEMBER(l->trait)) {
 208                 traits[num_methods++] = l->trait;
 209             }
 210         }
 211     }
 212     qsort(traits, num_methods, sizeof(trait_t*), compare_traits);
 213     for(t=0;t<num_methods;t++) {
 214         trait_t*trait = traits[t];
 215         if(IS_PUBLIC_MEMBER(trait)) {
 216             U8 access = trait->name->ns->access;
 217             const char*package = strdup(trait->name->ns->name);
 218             const char*name = strdup(trait->name->name);
 219             char np = 0;
 220             memberinfo_t*m = 0;
 221             if(trait->kind == TRAIT_METHOD) {
 222                 m = (memberinfo_t*)methodinfo_register_global(access, package, name);
 223                 m->return_type = resolve_class("return type", trait->method->return_type);
 224             } else {
 225                 m = (memberinfo_t*)varinfo_register_global(access, package, name);
 226                 m->type = resolve_class("type", trait->type_name);
 227             }
 228             m->flags |= FLAG_BUILTIN;
 229             m->parent = 0;
 230         }
 231     }
 232 }