DLTemplate.bt

#include <basics.h>

          enum {
            download_version_1 = 1,
            download_version_2 = 2,                        //  Legion (7.3.0.???)
            download_version_3 = 3,
          };
struct {
/*0x00*/  char signature[2];                                  // "DL"
/*0x02*/  uint8_BE_t version;
/*0x03*/  uint8_BE_t hash_size_ekey;
/*0x04*/  uint8_BE_t _unknown_04;
/*0x05*/  uint32_BE_t entry_count;
/*0x09*/  uint16_BE_t tag_count;
/*0x0b*/

if (version >= download_version_2) {
/*0x0b*/  uint8_BE_t number_of_flag_bytes;                // defaults to 0, up to 4
/*0x0c*/

if (version >= download_version_3) {
/*0x0c*/  uint8_BE_t base_priority;                       // defaults to 0
/*0x0d*/  char _unknown_0d[3];                             // four extra bytes are read in v3 but only one is used
/*0x10*/
}
}
} header;

struct {
/*0x00*/  char ekey[header.hash_size_ekey];
/*0x10*/  uint40_BE_t file_size;
/*0x15*/  uint8_BE_t priority;                             // header.base_priority is subtracted on parse
/*0x16*/

if (header._unknown_04) {
/*0x16*/  uint32_BE_t _unknown_16;
/*0x1a*/
}

if (header.version >= download_version_2) {
          uint8_BE_t flags[header.number_of_flag_bytes];   // defaults to 0 if no flag bytes present
}

} entries[header.entry_count._];

uint divru (uint lhs, uint rhs) { return (lhs + rhs - 1) / rhs; }
#define CHAR_BIT 8

struct {
         string name;                                // this string is zero terminated, no fixed size
                                                           // thus for readability we start offset at 0 here.
/*0x00*/ uint16_BE_t type;                    
/*0x02*/ char mask[divru (header.entry_count._, CHAR_BIT)];             
} tags[header.tag_count._]<optimize=false>;