vpk.h

   1 // VPK
   2 //=======================================================================================================================
   3
   4 #pragma pack(push, 1)
   5 typedef struct
   6 {
   7         u32 Signature;
   8         u32 Version;
   9         u32 TreeSize;
  10         u32 FileDataSectionSize;
  11         u32 ArchiveMD5SectionSize;
  12         u32 OtherMD5SectionSize;
  13         u32 SignatureSectionSize;
  14 }
  15 VPKHeader;
  16
  17 typedef struct
  18 {
  19         u32 CRC;
  20         u16 PreloadBytes;
  21         u16 ArchiveIndex;
  22         u32 EntryOffset;
  23         u32 EntryLength;
  24         u16 Terminator;
  25 }
  26 VPKDirectoryEntry;
  27 #pragma pack(pop)
  28
  29 void vpk_free( VPKHeader *self )
  30 {
  31         free( self );
  32 }
  33
  34 VPKDirectoryEntry *vpk_find( VPKHeader *self, const char *asset )
  35 {
  36         if( !self )
  37                 return NULL;
  38
  39         char wbuf[ 512 ];
  40         strcpy( wbuf, asset );
  41
  42         char *ext = csr_findext( wbuf, '.' );
  43         *(ext-1) = 0x00;
  44         char *fn = csr_findext( wbuf, '/' );
  45         *(fn-1) = 0x00;
  46         char *dir = wbuf;
  47
  48         char *pCur = ((char *)self) + sizeof( VPKHeader );
  49
  50         while( 1 )
  51         {
  52                 if( !*pCur ) break;
  53
  54                 int bExt = !strcmp( ext, pCur );
  55
  56                 while( *( pCur ++ ) ) {};
  57                 while( 1 )
  58                 {
  59                         if( !*pCur ) { pCur ++; break; }
  60
  61                         int bDir = !strcmp( dir, pCur );
  62
  63                         while( *( pCur ++ ) ) {};
  64                         while( 1 )
  65                         {
  66                                 if( !*pCur ) { pCur ++; break; }
  67
  68                                 const char *vpk_fn = pCur;
  69
  70                                 while( *( pCur ++ ) ) {};
  71                                 VPKDirectoryEntry *entry = (VPKDirectoryEntry *)pCur;
  72
  73                                 if( !strcmp( vpk_fn, fn ) && bExt && bDir )
  74                                 {
  75                                         return entry;
  76                                 }
  77
  78                                 pCur += entry->PreloadBytes + sizeof( VPKDirectoryEntry );
  79                         }
  80
  81                         if( bDir && bExt ) return NULL;
  82                 }
  83
  84                 if( bExt ) return NULL;
  85         }
  86
  87         return NULL;
  88 }