lib/modules/swfaction.c

   1 /* swfaction.c
   2
   3    Actionscript generation and parsing routines
   4
   5    Extension module for the rfxswf library.
   6    Part of the swftools package.
   7
   8    Copyright (c) 2001 Matthias Kramm <kramm@quiss.org>
   9
  10    This file is distributed under the GPL, see file COPYING for details
  11
  12 */
  13
  14 #include "../rfxswf.h"
  15
  16 struct Action
  17 {
  18     int version;
  19     char*name;
  20     U8 op;
  21     char*flags;
  22 } static actions[] =
  23 {
  24 /*
  25 f: frame (word)
  26 u: url (string)
  27 t: target (string)
  28 l: label (string)
  29 c: constant pool (string)
  30 s: skip (byte) (number of actions)
  31 m: method (byte) url:(0=none, 1=get, 2=post)/gf2:(1=play)
  32 b: branch (word) (number of bytes)
  33 p: type(byte), type=0:string, type=1:double
  34 {: define function (name (string), num (word), params (num strings), codesize (word)
  35 o: object (string)
  36 r: register (byte)
  37  */
  38 {3,"End", 0x00, ""},
  39 {3,"GotoFrame", 0x81, "f"},
  40 {4,"GotoFrame2", 0x9f, "m"}, // -1 (/Movieclip:3)
  41 {3,"GetUrl", 0x83, "ul"},
  42 {4,"GetUrl2", 0x9a, "m"}, //-2
  43 {3,"NextFrame", 0x04, ""},
  44 {3,"PreviousFrame", 0x05, ""},
  45 {3,"Play", 0x06, ""},
  46 {3,"Stop", 0x07, ""},
  47 {3,"ToggleQuality", 0x08, ""},
  48 {3,"StopSounds", 0x09, ""},
  49 {3,"WaitForFrame", 0x8a, "fs"},
  50 {4,"WaitForFrame2", 0x8d, "s"}, // -1
  51 {3,"SetTarget", 0x8b, "t"},
  52 {4,"SetTarget2", 0x20, ""}, //-1
  53 {3,"GotoLabel", 0x8c, "l"},
  54 {4,"Add", 0x0a, ""}, //  -2, +1
  55 {4,"Multiply", 0x0c, ""}, //  -2, +1
  56 {4,"Divide", 0x0d, ""}, //  -2, +1
  57 {4,"Subtract", 0x0b, ""}, //  -2, +1
  58 {4,"Less", 0x0f, ""}, //  -2, +1
  59 {4,"Equals", 0x0e, ""}, //  -2, +1
  60 {4,"And", 0x10, ""}, //  -2, +1
  61 {4,"Or", 0x11, ""}, //  -2, +1
  62 {4,"Not", 0x12, ""}, //  -1, +1
  63 {4,"StringAdd", 0x21, ""}, // -2,+1
  64 {4,"StringLength", 0x14, ""}, // -1, +1
  65 {4,"MBStringLength", 0x31}, // -1, +1
  66 {4,"StringEquals", 0x13, ""}, // -2, +1
  67 {4,"StringLess", 0x29, ""}, //-2, +1
  68 {4,"StringExtract", 0x15, ""}, // -3, +1
  69 {4,"MBStringExtract", 0x35, ""}, //-3 +1
  70 {4,"Push", 0x96, "p"}, //  +1
  71 {4,"Pop", 0x17, ""}, //  -1
  72 {4,"ToInteger", 0x18, ""}, // -1, +1
  73 {4,"CharToAscii", 0x32, ""}, // -1, +1
  74 {4,"AsciiToChar", 0x33, ""}, // -1, +1
  75 {4,"MBCharToAscii", 0x36, ""}, // -1, +1
  76 {4,"MBAsciiToChar", 0x37, ""}, // -1, +1
  77 {4,"Jump", 0x99, "b"},
  78 {4,"If", 0x9d, "b"}, // -1
  79 {4,"Call", 0x9e, ""}, //-1 (frame label/number)
  80 {4,"GetVariable", 0x1c,""}, // -1, +1
  81 {4,"SetVariable", 0x1d,""}, // -2
  82 {4,"GetProperty", 0x22,""}, //-2, +1
  83 {4,"SetProperty", 0x23, ""}, // -3
  84 {4,"RemoveSprite", 0x25, ""}, //-1
  85 {4,"StartDrag", 0x27, ""}, // -2, -1, (-4)
  86 {4,"EndDrag", 0x28, ""},
  87 {4,"CloneSprite", 0x24, ""}, // -3
  88 {4,"Trace", 0x26, ""}, //-1
  89 {4,"GetTime", 0x34, ""}, //+1
  90 {4,"RandomNumber", 0x30, ""}, //-1,+1
  91 {5,"Modulo", 0x3f,""},
  92 {5,"BitAnd", 0x60,""},
  93 {5,"BitLShift", 0x63,""},
  94 {5,"BitOr", 0x61,""},
  95 {5,"BitRShift", 0x64,""},
  96 {5,"BitURShift", 0x65,""},
  97 {5,"BitXor", 0x62,""},//66?
  98 {5,"Decrement", 0x51,""},
  99 {5,"Increment", 0x50,""},
 100 {5,"PushDuplicate", 0x4c,""},
 101 {5,"StackSwap", 0x4d,""}, //?
 102 {5,"StoreRegister", 0x87,"r"},
 103 {5,"CallFunction", 0x3d,""},
 104 {5,"DefineFunction", 0x9b, "{"},
 105 {5,"Return", 0x3e,""},
 106 {5,"GetMember", 0x4e,""},
 107 {5,"SetMember", 0x4f,""},
 108 {5,"CallMethod", 0x52,""},
 109 {5,"Constantpool", 0x88, "c"},
 110 {5,"DefineLocal", 0x3c,""},
 111 {5,"DefineLocal2", 0x41,""},
 112 {5,"Makehash", 0x43, ""}, //??
 113 {5,"Delete", 0x3a,""}, //?
 114 {5,"Delete2", 0x3b,""},
 115 {5,"Enumerate", 0x46,""},
 116 {5,"Equals2", 0x49,""},
 117 {5,"InitArray", 0x42,""}, // InitObject?
 118 {5,"NewMethod", 0x53,""}, //?
 119 {5,"NewObject", 0x40,""},
 120 {5,"TargetPath", 0x45,""}, //?
 121 {5,"With", 0x94, "o"},
 122 {5,"ToNumber", 0x4a,""}, //?
 123 {5,"ToString", 0x4b,""}, //?
 124 {5,"TypeOf", 0x44,""},
 125 {5,"Add2", 0x47,""},
 126 {5,"Less2", 0x48,""}
 127 };
 128 static int definedactions = sizeof(actions)/sizeof(struct Action);
 129
 130 ActionTAG* GetActions(TAG*tag)
 131 {
 132     U8 op = 1;
 133     int length;
 134     ActionTAG tmp;
 135     ActionTAG*action = &tmp;
 136     U8*data;
 137     while(op)
 138     {
 139         int pos;
 140         action->next = (ActionTAG*)malloc(sizeof(ActionTAG));
 141         action->next->prev = action;
 142         action->next->next = 0;
 143         action = action->next;
 144
 145         op = GetU8(tag);
 146         if(op<0x80)
 147             length = 0;
 148         else
 149             length = GetU16(tag);
 150
 151         if(length) {
 152             int t;
 153             data = malloc(length);
 154             for(t=0;t<length;t++)
 155                 data[t] = GetU8(tag);
 156         } else {
 157           data = 0;
 158         }
 159         action->op = op;
 160         action->len = length;
 161         action->data = data;
 162         action->parent = tag;
 163     }
 164     return tmp.next;
 165 }
 166
 167 void SetActions(TAG*tag, ActionTAG*action)
 168 {
 169     while(action)
 170     {
 171         SetU8(tag, action->op);
 172         if(action->op & 128)
 173           SetU16(tag, action->len);
 174
 175         SetBlock(tag, action->data, action->len);
 176
 177         action = action->next;
 178     }
 179 }
 180
 181 /* TODO: this should be in swfdump.c */
 182 void DumpActions(ActionTAG*atag, char*prefix)
 183 {
 184     U8 op;
 185     int t;
 186     U8*data;
 187     char* cp;
 188     if(!prefix)
 189         prefix="";
 190     while(atag)
 191     {
 192         for(t=0;t<definedactions;t++)
 193             if(actions[t].op == atag->op)
 194                 break;
 195
 196         if(t==definedactions) {
 197             printf("%s (%5d bytes) action: %02x\n", prefix, atag->len, op);
 198             atag = atag->next;
 199             continue;
 200         }
 201         printf("%s (%5d bytes) action: %s", prefix, atag->len, actions[t].name);
 202         cp = actions[t].flags;
 203         data = atag->data;
 204         if(atag->len) //TODO: check for consistency: should we have a length?
 205         while(*cp)
 206         {
 207             switch(*cp)
 208             {
 209                 case 'f': {
 210                     printf(" %d", *(U16*)data);data+=2; //FIXME: le/be
 211                 } break;
 212                 case 'u': {
 213                     printf(" URL:\"%s\"", data);data+=strlen(data)+1;
 214                 } break;
 215                 case 't': {
 216                     printf(" Target:\"%s\"", data);data+=strlen(data)+1;
 217                 } break;
 218                 case 'l': {
 219                     printf(" Label:\"%s\"", data);data+=strlen(data)+1;
 220                 } break;
 221                 case 'c': {
 222                     printf(" Constant Pool:\"%s\"", data);data+=strlen(data)+1;
 223                 } break;
 224                 case 's': {
 225                     printf(" +%d", data);data++;
 226                 } break;
 227                 case 'm': {
 228 //m: method (byte) url:(0=none, 1=get, 2=datat)/gf2:(1=play)
 229                     printf(" %d", data);data++;
 230                 } break;
 231                 case 'b': {
 232                     printf(" %d", *(U16*)data);data+=2;
 233                 } break;
 234                 case 'p': {
 235                     U8 type = *data++;
 236                     if(type == 0) {
 237                         printf(" String:\"%s\"", data);data+=strlen(data)+1;
 238                     } else if (type == 1) {
 239                         printf(" Double:\"%f\"", *(float*)data);data+=4;
 240                     } else if (type == 2) {
 241                         printf(" NULL");
 242                     } else if (type == 4) {
 243                         printf(" register:%d", data++);
 244                     } else if (type == 5) {
 245                         printf(" %s", data++?"true":"false");
 246                     } else if (type == 6) {
 247                         printf(" %f", *(double*)data);  data+=8;
 248                     } else if (type == 7) {
 249                         printf(" %d", *(int*)data); data+=4;
 250                     } else if (type == 8) {
 251                         printf(" Lookup:%d", data++);
 252                     }
 253                 } break;
 254
 255             }
 256             cp++;
 257         }
 258
 259         if(data < atag->data + atag->len)
 260         {
 261             int nl = ((atag->data+atag->len)-data);
 262             int t;
 263             printf(" remainder of %d bytes:\"", nl);
 264             for(t=0;t<nl;t++) {
 265                 if(data[t]<32)
 266                     printf("\\%d",data[t]);
 267                 else
 268                     printf("%c", data[t]);
 269             }
 270             printf("\"");
 271         }
 272         printf("\n");
 273         atag = atag->next;
 274     }
 275 }
 276