////////////////////////////////////////////////////////////////////////////////
//
//  Risen PAK file format specs.
//  (all values are little-endian)
//  Copyright (c) 2011 Nico Bendlin <nicode@gmx.net>
//
//  +---------------+
//  |  file header  |
//  +---------------+
//  |   file data   |
//  +---------------+
//  |  entry table  |
//  +---------------+
//
//  All offsets are absolute (relative to the start of the header).
//  All timestamps represent the number of 100-nanosecond intervals
//  since January 1, 1601 (a Microsoft Windows FILETIME structure).
//
////////////////////////////////////////////////////////////////////////////////

enum RisenPakEncryption : uint32_t {
  RisenPakEncryption_None = 0x00000000
};

enum RisenPakCompression : uint32_t {
  RisenPakCompression_None = 0x00000000,
  RisenPakCompression_Auto = 0x00000001,
  RisenPakCompression_ZLib = 0x00000002
};

enum RisenPakAttributes : uint32_t {
  RisenPakAttribute_ReadOnly   = 0x00000001,  // FILE_ATTRIBUTE_READONLY
  RisenPakAttribute_Hidden     = 0x00000002,  // FILE_ATTRIBUTE_HIDDEN
  RisenPakAttribute_System     = 0x00000004,  // FILE_ATTRIBUTE_SYSTEM
  RisenPakAttribute_Directory  = 0x00000010,  // FILE_ATTRIBUTE_DIRECTORY
  RisenPakAttribute_Archive    = 0x00000020,  // FILE_ATTRIBUTE_ARCHIVE
  RisenPakAttribute_Normal     = 0x00000080,  // FILE_ATTRIBUTE_NORMAL
  RisenPakAttribute_Temporary  = 0x00000100,  // FILE_ATTRIBUTE_TEMPORARY
  RisenPakAttribute_Compressed = 0x00000800,  // FILE_ATTRIBUTE_COMPRESSED
  RisenPakAttribute_NotIndexed = 0x00002000,  // FILE_ATTRIBUTE_NOT_CONTENT_INDEXED
  RisenPakAttribute_Encrypted  = 0x00004000,  // FILE_ATTRIBUTE_ENCRYPTED
  RisenPakAttribute_Deleted    = 0x00008000,  // Not used in Risen PAKs
  RisenPakAttribute_Virtual    = 0x00010000,  // FILE_ATTRIBUTE_VIRTUAL
  RisenPakAttribute_Packed     = 0x00020000,  // Stored in a PAK volume
  RisenPakAttribute_Cached     = 0x00040000   // Not used in Risen PAKs
};

struct RisenPakHeader {
  uint32_t                 Version;      // 0x00000001
  uint32_t                 Product;      // 0x30563347 ("G3V0")
  uint32_t                 Revision;     // 0x00000000
  enum RisenPakEncryption  Encryption;
  enum RisenPakCompression Compression;
  uint32_t                 Reserved;     // 0x00000000
  uint64_t                 DataOffset;   // sizeof(struct RisenPakHeader)
  uint64_t                 RootOffset;   // class RisenPakDirectory
  uint64_t                 VolumeSize;
};

class RisenPakFile {
  uint32_t                 NameLength;
  char8_t                  NameString[NameLength + (NameLength != 0)];
  uint64_t                 DataOffset;
  uint64_t                 TimeCreated;       // FILETIME
  uint64_t                 TimeLastAccessed;  // FILETIME
  uint64_t                 TimeLastModified;  // FILETIME
  uint32_t                 FileAttributes;    // FILE_ATTRIBUTE_* | 0x00020000
  enum RisenPakEncryption  Encryption;
  enum RisenPakCompression Compression;
  uint32_t                 DataSize;
  uint32_t                 FileSize;
}

class RisenPakDirectory {
  uint32_t NameLength;
  char8_t  NameString[NameLength + (NameLength != 0)];
  uint64_t TimeCreated;       // FILETIME
  uint64_t TimeLastAccessed;  // FILETIME
  uint64_t TimeLastModified;  // FILETIME
  uint32_t FileAttributes;    // FILE_ATTRIBUTE_* | 0x00020000
  uint32_t Count;
  for( Count ) {
    enum RisenPakAttributes Attributes;
    if( RisenPakAttribute_Directory & Attributes ) {
      class RisenPakDirectory Directory;
    } else {
      class RisenPakFile File;
    }
  }
}