Added Adler32 to System.IO.Hashing.#123601

Merged

stephentoub merged 19 commits intodotnet:mainfrom

AraHaan:add-adler32-to-system-io-hashing

Feb 13, 2026

Commits on Feb 12, 2026

Added Adler32 to System.IO.Hashing.

AraHaan
authored and
stephentoub
committed
Update Adler32.cs

authored and
stephentoub
committed
Removed Residue test cases from Adler32Tests.

AraHaan
authored and
stephentoub
committed
Fixed empty hash value tests.

AraHaan
authored and
stephentoub
committed
Optimized away needless bounds checking in each access to buf.

AraHaan
authored and
stephentoub
committed
Moved Adler32 up in the ref source.

AraHaan
authored and
stephentoub
committed
Fix Adler32.Update to return current adler when empty

AraHaan
authored and
stephentoub
committed
Moved Base and NMax into locals inside of Update().

AraHaan
authored and
stephentoub
committed
Update src/libraries/System.IO.Hashing/src/System/IO/Hashing/Adler32.cs

authored and
stephentoub
committed
Fixed writing LittleEndian -> BigEndian

AraHaan
authored and
stephentoub
committed
Fixed tests.

AraHaan
authored and
stephentoub
committed
Added method for vectorized adler32, and moved the normal adler32 calc to UpdateScalar(). Also added optional spot where ARM intrinsics can be used in UpdateScalar if vectorization is not possible.

AraHaan
authored and
stephentoub
committed
Added functions for Avx2 and Sse Scalar implementations.

AraHaan
authored and
stephentoub
committed
Commented out the optimization paths until they are properly implemented.

AraHaan
authored and
stephentoub
committed
Removed commented out code.

AraHaan
authored and
stephentoub
committed
Removed Adler32.Vectorized.cs as it is not used at the moment.

AraHaan
authored and
stephentoub
committed
Apply suggestion from @stephentoub
stephentoub
committed
Apply suggestion from @stephentoub
stephentoub
committed
Add additional tests for larger inputs
stephentoub
committed

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Added Adler32 to System.IO.Hashing.#123601

Added Adler32 to System.IO.Hashing.#123601
stephentoub merged 19 commits intodotnet:mainfrom
AraHaan:add-adler32-to-system-io-hashing

Commits on Feb 12, 2026

Added Adler32 to System.IO.Hashing.

Update Adler32.cs

Removed Residue test cases from Adler32Tests.

Fixed empty hash value tests.

Optimized away needless bounds checking in each access to buf.

Moved Adler32 up in the ref source.

Fix Adler32.Update to return current adler when empty

Moved Base and NMax into locals inside of Update().

Update src/libraries/System.IO.Hashing/src/System/IO/Hashing/Adler32.cs

Fixed writing LittleEndian -> BigEndian

Fixed tests.

Added method for vectorized adler32, and moved the normal adler32 calc to UpdateScalar(). Also added optional spot where ARM intrinsics can be used in UpdateScalar if vectorization is not possible.

Added functions for Avx2 and Sse Scalar implementations.

Commented out the optimization paths until they are properly implemented.

Removed commented out code.

Removed Adler32.Vectorized.cs as it is not used at the moment.

Apply suggestion from @stephentoub

Apply suggestion from @stephentoub

Add additional tests for larger inputs