Commit Graph

7 Commits

Author SHA1 Message Date
kleines Filmröllchen
9a026fc8d5 AK: Implement SipHash as the default hash algorithm for most use cases
SipHash is highly HashDoS-resistent, initialized with a random seed at
startup (i.e. non-deterministic) and usable for security-critical use
cases with large enough parameters. We just use it because it's
reasonably secure with parameters 1-3 while having excellent properties
and not being significantly slower than before.
2023-10-01 11:06:36 +03:30
Sam Atkins
067d0689c5 AK: Replace C-style casts 2023-03-09 21:43:54 +01:00
Andreas Kling
ae3ffdd521 AK: Make it possible to not using AK classes into the global namespace
This patch adds the `USING_AK_GLOBALLY` macro which is enabled by
default, but can be overridden by build flags.

This is a step towards integrating Jakt and AK types.
2022-11-26 15:51:34 +01:00
Timothy Flynn
3dccaa39d8 AK: Define a traits helper for case-insensitive StringView hashing
Currently, we define a CaseInsensitiveStringTraits structure for String.
Using this structure for StringView involves allocating a String from
that view, and a second string to convert that intermediate string to
lowercase.

This defines CaseInsensitiveStringViewTraits (and the underlying helper
case_insensitive_string_hash) to avoid allocations.
2022-01-11 00:36:45 +01:00
Leandro Pereira
368e74fdf8 AK: Allow seed value to be specified in string_hash()
For some algorithms, such as bloom filters, it's possible to reuse a
hash function (rather than having different hashing functions) if the
seed is different each time the hash function is used.

Modify AK::string_hash() to take a seed parameter, which defaults to 0
(the value the hash value was originally initialized to).
2021-10-25 23:37:18 +02:00
Ben Wiederhake
f8d7b4daea AK: Add missing headers
Example failure:

IDAllocator.h only pulls in AK/Hashtable.h, so any compilation unit that
includes AK/IDAllocator.h without including AK/Traits.h before it used
to be doomed to fail with the cryptic error message "In instantiation of
'AK::HashTable<T, TraitsForT, IsOrdered>::Iterator AK::HashTable<T,
TraitsForT, IsOrdered>::find(const T&) [with T = int; TraitsForT =
AK::Traits: incomplete type 'AK::Traits<int>' used in nested name
specifier".
2021-10-06 23:52:40 +01:00
Andreas Kling
3e603b2f32 AK: Make StringView::hash() constexpr
This required moving string_hash() to its own header so that everyone
can see it.
2021-05-14 15:24:32 +02:00