diff options
Diffstat (limited to 'fortran/src/H5_ff.f90')
| -rw-r--r-- | fortran/src/H5_ff.f90 | 46 |
1 files changed, 38 insertions, 8 deletions
diff --git a/fortran/src/H5_ff.f90 b/fortran/src/H5_ff.f90 index 49e64a3..3ca3979 100644 --- a/fortran/src/H5_ff.f90 +++ b/fortran/src/H5_ff.f90 @@ -6,11 +6,6 @@ ! PURPOSE ! This module provides fortran specific helper functions for the HDF library ! -! USES -! H5LIB_PROVISIONAL - This module provides helper functions for Fortran 2003 -! only features. If Fortran 2003 functions are enabled then -! H5_ff_F03.f90 is compiled, else H5_ff_F90.f90, -! which is just a place holder blank module, is compiled. ! COPYRIGHT ! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ! Copyright by The HDF Group. * @@ -37,9 +32,6 @@ MODULE H5LIB - USE H5LIB_PROVISIONAL ! helper functions for Fortran 2003 features: - ! pre-Fortran 2003 - empty module - ! Forttran 2003 - contains functions USE H5GLOBAL CONTAINS @@ -406,4 +398,42 @@ CONTAINS END FUNCTION h5kind_to_type +!****f* H5LIB_PROVISIONAL/h5offsetof +! +! NAME +! h5offsetof +! +! PURPOSE +! Computes the offset in memory +! +! Inputs: +! start - starting pointer address +! end - ending pointer address +! +! Outputs: +! offset - offset of a member within the derived type +! +! AUTHOR +! M. Scot Breitenfeld +! Augest 25, 2008 +! +! ACKNOWLEDGEMENTS +! Joe Krahn +! +! Fortran2003 Interface: + FUNCTION h5offsetof(start,end) RESULT(offset) + USE, INTRINSIC :: ISO_C_BINDING + USE H5GLOBAL + IMPLICIT NONE + INTEGER(SIZE_T) :: offset + TYPE(C_PTR), VALUE, INTENT(IN) :: start, end +!***** + INTEGER(C_INTPTR_T) :: int_address_start, int_address_end + int_address_start = TRANSFER(start, int_address_start) + int_address_end = TRANSFER(end , int_address_end ) + + offset = int_address_end - int_address_start + + END FUNCTION h5offsetof + END MODULE H5LIB |