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Код

typedef unsigned char      bitu8;   // 8-bit,  unsigned
typedef unsigned short int bitu16;  // 16-bit, unsigned
typedef unsigned long int  bitu32;  // 32-bit, unsigned

if (Level->EngineVersion == TombRaider_4) {
#ifdef INCLUDE_TR4_SUPPORT
      bitu16 tmp16;
      bitu32 CompressedSize,
             UncompressedSize;
      bitu8  *CompressedData;
      int    zerr;

      // Allow TR2fread() to really read the file
      LevelVersion = TombRaider_2;

      // read three unknown bitu16s
      TR2fread(&tmp16, sizeof(tmp16), 1, fp);
      TR2fread(&tmp16, sizeof(tmp16), 1, fp);
      TR2fread(&tmp16, sizeof(tmp16), 1, fp);

      // read the sizes of the 32-bit textures
      TR2fread(&UncompressedSize, sizeof(UncompressedSize), 1, fp);
      TR2fread(&CompressedSize, sizeof(CompressedSize), 1, fp);
      // skip the 32-bit textures
      fseek(fp, CompressedSize, SEEK_CUR);

      // read in the 16-bit textures, set NumTextiles
      TR2fread(&UncompressedSize, sizeof(UncompressedSize), 1, fp);
      TR2fread(&CompressedSize, sizeof(CompressedSize), 1, fp);
      Level->NumTextiles = UncompressedSize / sizeof(tr2_textile16);
      Level->Textile16 = (struct tr2_textile16_struct *)TR2alloc(sizeof(tr2_textile16) * Level->NumTextiles);
      // allocate a temporary buffer for decompression
      CompressedData = (bitu8 *)TR2alloc(CompressedSize);
      TR2fread(CompressedData, CompressedSize, 1, fp);
      // decompress the textures
      zerr = uncompress((bitu8 *)Level->Textile16, &UncompressedSize, CompressedData, CompressedSize);
      // free the temporary buffer
      free((char *)CompressedData);

      // read the sizes of the remaining textures
      TR2fread(&UncompressedSize, sizeof(UncompressedSize), 1, fp);
      TR2fread(&CompressedSize, sizeof(CompressedSize), 1, fp);
      // skip the remaining textures
      fseek(fp, CompressedSize, SEEK_CUR);

      // read the sizes of the level data
      TR2fread(&UncompressedSize, sizeof(UncompressedSize), 1, fp);
      TR2fread(&CompressedSize, sizeof(CompressedSize), 1, fp);
      // allocate a temporary buffer for decompression
      CompressedData = (bitu8 *)TR2alloc(CompressedSize);
      TR2fread(CompressedData, CompressedSize, 1, fp);
      TR4_LevelData = (bitu8 *)TR2alloc(UncompressedSize);
      // decompress the level data
      zerr = uncompress(TR4_LevelData, &UncompressedSize, CompressedData, CompressedSize);
      TR4_LevelDataOffset = 0;
      TR4_LevelDataSize = UncompressedSize;

      // Force TR2fread() to read the decompressed data
      LevelVersion = TombRaider_4;
#else    // !INCLUDE_TR4_SUPPORT
      fprintf(stderr, "Sorry, TR4 support was not compiled into this viewer.\n");
      return(NULL);
#endif   // INCLUDE_TR4_SUPPORT
      }