Merge branch 'barry/2026-01-13/ftn-generation-for-context-functions' into 'main'

Fortran generation of interface definitions for functions that take and return context variables (void *ctx and PetC

Merge branch 'barry/2026-01-13/ftn-generation-for-context-functions' into 'main'

Fortran generation of interface definitions for functions that take and return context variables (void *ctx and PetCtx ctx)

See merge request petsc/petsc!8956

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Add automatic generated fortran support for setting and returning contexts

Major cleanup of the code for setting and returning application (previously called user) contexts
- PetscCtx ctx is now t

Add automatic generated fortran support for setting and returning contexts

Major cleanup of the code for setting and returning application (previously called user) contexts
- PetscCtx ctx is now the standard for passing in contexts
- PetscCtxRt ctx is the standard for passing out contexts, including context destroy routines based on PetscCtxDestroyFn

Both of these are typedef to void*

Also removed most use of user and userctx for context arguments now consistently named ctx

Improved documentation on PetscCtx and PetscCtxRt and on how to use contexts (including getting them) from Fortran

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Merge remote-tracking branch 'origin/release'

Merge branch 'stefanozampini/fix-firedrake' into 'release'

MatCreateSubMatrix_Nest: need to increase the state of the object

See merge request petsc/petsc!8860

MatCreateSubMatrix_Nest: need to increase the state of the object

Merge branch 'barry/2025-10-18/optimize-aij-ops' into 'main'

Refactor handling of diagonal marking in *AIJ and SELL matrices

See merge request petsc/petsc!8797

- Replace MatMissingDiagonal() and MatMarkDiagonals_SeqXXX() with MatGetDiagonalMarkers_SeqXXX()

- Mat_SeqXXX->diag is not automatically created during MatAssemblyEnd() saving memory and time

- Replace MatMissingDiagonal() and MatMarkDiagonals_SeqXXX() with MatGetDiagonalMarkers_SeqXXX()

- Mat_SeqXXX->diag is not automatically created during MatAssemblyEnd() saving memory and time

- Accessing Mat_SeqXXX->diag now requires the use of MatGetDiagonalMarkers_SeqXXX() except when the current values are known to be correct; for example during numerical factorizations and solves

- Mat_SeqXXX->diag is now never shared among matrices; hence the free_diag flag is gone. That was always a risky proposition since any of the owning matrices could chang the values thus making them incorrect for other owners.

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Merge branch 'barry/2025-10-24/fix-dmshellsetdestroyctx' into 'main'

Finish converting the function prototypes of destroy for contexts to use PetscCtxDestroyFn

See merge request petsc/petsc!8810

Merge branch 'barry/2025-11-04/fix-matview-nest-ascii' into 'main'

Fix outdated output of MatView() for nest matrix with ASCII

See merge request petsc/petsc!8827

Fix outdated output of MatView() for nest matrix with ASCII

Now matches VecNest version and does not have outdated reprinting of Mat Object and type

Change names of Mat_XXX product contexts to MatProductCtx_XXX for code maintainability

Update destroy callback of all MatProductCtx and MatShellSetMatProductOperation() to use PetscCtxDestroyFn

Merge branch 'jolivet/clang-format-21' into 'main'

clang-format-21

See merge request petsc/petsc!8202

Remove unnecessary braces around one-liners

git grep -lE "[ ]*(if|for|while) \(.*\) {[^;]*;[^;]*}$" -- '*.c' '*.cxx' '*.cu' '*.h' '*.hpp' '*.cpp' | xargs sed -i '' -E 's#([ ]*)(if|for|while) \((.*)\

Remove unnecessary braces around one-liners

git grep -lE "[ ]*(if|for|while) \(.*\) {[^;]*;[^;]*}$" -- '*.c' '*.cxx' '*.cu' '*.h' '*.hpp' '*.cpp' | xargs sed -i '' -E 's#([ ]*)(if|for|while) \((.*)\) {([^;]*);([^;]*)}$#\1\2 \(\3\)\4;\5#'

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Merge branch 'barry/2025-07-04/improve-fortran-error-check-matcreatenest' into 'main'

Add clearer error check for Fortran MatCreateNest() and proper Fortran stub...

See merge request petsc/petsc!85

Merge branch 'barry/2025-07-04/improve-fortran-error-check-matcreatenest' into 'main'

Add clearer error check for Fortran MatCreateNest() and proper Fortran stub...

See merge request petsc/petsc!8526

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Add clearer error check for Fortran MatCreateNest() and proper Fortran stub for MatNestSetSubMats().

Reported-by: Randall Mackie

Merge branch 'stefanozampini/nest-view' into 'main'

MATNEST: add support for MatView for ascii matlab

See merge request petsc/petsc!8475

MATNEST: add support for MatView for ascii matlab

Merge remote-tracking branch 'origin/release'

Merge branch 'jose/release/fix-matcopy-nest2' into 'release'

Mat: another fix to MatCopy_Nest() in case of empty blocks

See merge request petsc/petsc!8387

Mat: another fix to MatCopy_Nest() in case of empty blocks

Complements !8375 for when either A and B has an empty block, which
exists in the other matrix

Merge remote-tracking branch 'origin/release'

Merge branch 'jose/release/fix-matcopy-nest' into 'release'

Mat: fix MatCopy_Nest() in case of empty blocks

See merge request petsc/petsc!8375

Mat: fix MatCopy_Nest() in case of empty blocks

Merge remote-tracking branch 'origin/release'

Merge branch 'jose/ftn-penss' into 'release'

Fortran bindings: add PeNSS for mixed automatic-custom interfaces

See merge request petsc/petsc!8312