#11143: Feature request: Add index/read/write primops with byte offset for ByteArray# -------------------------------------+------------------------------------- Reporter: vagarenko | Owner: sjakobi Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Resolution: | Keywords: newcomers Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4433 Wiki Page: | -------------------------------------+------------------------------------- Comment (by vagarenko): Replying to [comment:10 sjakobi]:
Replying to [comment:9 vagarenko]:
Replying to [comment:8 sjakobi]:
* They relieve the user from doing the byte offset computation. Then what does that `Int# {-byte offset-}` parameter mean?
What I meant is that the user doesn't need to compute the total offset. While a user may use the API you proposed like {{{#!hs indexByteInt16Array# ba (byte_offset + type_offset * int16_size)
}}} I still don't understand. What is total offset? What are `byte_offset` and `type_offset`?
By `byte_offset` you mean number of bytes from the start of the array `ba` to the sought value of type `Int#`, correct? Then what is `type_offset`? Number of `Int16` elements before the sought element? But my motivation for this ticket was to be able to store values of different types in a `ByteArray#`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11143#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler