Makes it possible to construct persistent German Strings from data with 'static
lifetime. This doesn't leak any additional data.
Change-Id: Ifb3a36ff72b106724883302e4c2195ac54acd352
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12263
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: tazjin <tazjin@tvl.su>
Adds a StorageClassPtr type that is set up to be able to steal bits from an
aligned pointer to encode the storage class of a German String.
Change-Id: I64591174eac1ebcb73e624a59bd107ba1e02c69d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12262
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Makes it possible to construct a GermanString from an owned byte vector, without
having to clone the data.
This is done by "disowning" the vector using ManuallyDrop to access its internal
pointer. For transient strings, this memory is then owned (and freed) by the
GermanString instance.
Small strings are copied out of the heap and stored inline as before, to avoid
any dereferencing operations.
Change-Id: I754736099f71d646d430aed73e558a5a7626c394
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12249
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
This can short-circuit two large string comparisons.
Change-Id: If45e7cf33921fe571482dc710c27ef8cc7c70885
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12245
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
This is where one of the advantages of this string representation starts to
shine: For small strings there's no derefencing any heap memory at all, and for
the long representation we can compare the prefix before moving on.
Change-Id: Iac333a52e8d7c9dd09e33dbcf51754e321c880e6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12238
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
All of these strings are currently transient (the storage class is not yet
represented anywhere), and the ones that are heap allocated need to be
deallocated when the transient string dies.
Change-Id: Iba0ca926df5db7594f304c5d5318db9d69c6f42c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12235
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
This adds an initial implementation of the so-called "German Strings" in Rust.
https://cedardb.com/blog/german_strings/
This implementation is *far from* complete, the only thing that can be done
right now is construct a string, and even that I'm not fully happy with.
Change-Id: I2697932a0ef373be76ffd14d59677493a5783b58
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12234
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
