Talk:IMG archive

SA - Streaming size/archive size

Why is it thought that there are two sizes in each directory entry? To me, the fact that the second size is always zero suggests that the two 2-byte size values are actually just one 4-byte value. If you read a 4-byte value there, you always get the same number as you would get by reading the first 2-byte value (by virtue of the fact that the second 2 bytes are always 0). Additionally, it would make sense for Rockstar to have used a uint32_t for the size, because they used one for the offset. All my tools use a uint32_t here and it has never caused any issues. – Squ1dd13 (talk) 20:37, 29 October 2020 (UTC)

Game reads this as uint16.

.text:005B61E6 058                 movzx   eax, word ptr [esp+60]                                  ; streaming size
.text:005B61EB 058                 mov     ecx, CStreaming__ms_streamingBufferSize
.text:005B61F1 058                 add     esp, 0Ch
.text:005B61F4 04C                 cmp     eax, ecx
.text:005B61F6 04C                 jle     short loc_5B61FD
.text:005B61F8 04C                 mov     CStreaming__ms_streamingBufferSize, eax

Seemann (talk) 18:55, 31 October 2020 (UTC)