c_bpack_wrapper Module Reference

Functions/Subroutines
subroutine	c_matvec_user_c (trans, M, N, num_vect, Vin, Vout, ker)
	****** Fortran interface for the matvec function required by c_BPACK_construction_Matvec, inside which a c++ function pointer kerC_FuncHMatVec is called ******! It is assumed the kerC_FuncHMatVec interfaces with local input and output vectors, which assume an already ordered hierarchical matrix More...
subroutine	c_matvec_user_c_md (Ndim, trans, M, N, num_vect, Vin, Vout, ker)
	****** Fortran interface for the matvec function required by c_BPACK_construction_Matvec, inside which a c++ function pointer kerC_FuncHMatVec is called ******! It is assumed the kerC_FuncHMatVec interfaces with local input and output vectors, which assume an already ordered hierarchical matrix More...
subroutine	c_bmatvec_user_c (ker, block_o, trans, M, N, num_vect, Vin, ldi, Vout, ldo, a, b, ptree, stats, operand1)
	****** Fortran interface for the matvec function required by c_BF_randomized, inside which a c++ function pointer kerC_FuncBMatVec is called ******! It is assumed the kerC_FuncBMatVec does not need ldi and ldo! ******! It is assumed the kerC_FuncBMatVec interfaces with local input and output vectors, which assume already ordered rows/columns More...
subroutine	c_c_bpack_createptree (nmpi, groupmembers, MPIcomm, ptree_Cptr)
	**** C interface of process tree construction More...
subroutine	c_c_bpack_createstats (stats_Cptr)
	**** C interface of initializing statistics More...
subroutine	c_c_bpack_getstats (stats_Cptr, nam, val_d)
	**** C interface of getting one entry in stats More...
subroutine	c_c_bpack_printstats (stats_Cptr, ptree_Cptr)
	**** C interface of printing statistics More...
subroutine	c_c_bpack_createoption (option_Cptr)
	**** C interface of initializing option More...
subroutine	c_c_bpack_copyoption (option_Cptr, option_Cptr1)
	**** C interface of copy option More...
subroutine	c_c_bpack_printoption (option_Cptr, ptree_Cptr)
	**** C interface of printing option More...
subroutine	c_c_bpack_getoption (option_Cptr, nam, val_d)
	**** C interface of getting one entry in option, always returning double More...
subroutine	c_c_bpack_setoption (option_Cptr, nam, val_Cptr)
	**** C interface of set one entry in option More...
subroutine	c_c_bpack_construct_element_compute (bmat_Cptr, option_Cptr, stats_Cptr, msh_Cptr, ker_Cptr, ptree_Cptr, C_FuncZmn, C_FuncZmnBlock, C_QuantApp)
	**** C interface of matrix construction More...
subroutine	c_c_bpack_md_construct_element_compute (Ndim, bmat_Cptr, option_Cptr, stats_Cptr, msh_Cptr, ker_Cptr, ptree_Cptr, C_FuncZmn_MD, C_QuantApp)
	**** C interface of tensor construction More...
subroutine	c_c_bpack_construct_init (N, Ndim, Locations, nns, nlevel, tree, Permutation, N_loc, bmat_Cptr, option_Cptr, stats_Cptr, msh_Cptr, ker_Cptr, ptree_Cptr, C_FuncDistmn, C_FuncNearFar, C_QuantApp)
	**** C interface of matrix construction via entry evaluation More...
subroutine	c_c_bpack_md_construct_init (Ns, Nmax, Ndim, Locations, Permutation, N_loc, bmat_Cptr, option_Cptr, stats_Cptr, msh_Cptr, ker_Cptr, ptree_Cptr, C_FuncNearFar_MD, C_QuantApp)
	**** C interface of multi-dimensional BF construction via entry evaluation More...
subroutine	c_c_bpack_new2old (msh_Cptr, newidx_loc, oldidx)
	**** C interface of converting from new,local index to old, global index, the indexs start from 1 More...
subroutine	c_c_bpack_md_new2old (Ndim, msh_Cptr, newidx_loc, oldidx)
	**** C interface of converting from new,local index to old, global index, the indexs start from 1. Both newidx_loc and oldidx are Ndim dimensional. More...
subroutine	c_c_singleindextomultiindex (Ndim, dims, single_index_in, multi_index)
	**** C interface of Fortran subroutine c_SingleIndexToMultiIndex for converting single index to multi-index More...
subroutine	c_c_multiindextosingleindex (Ndim, dims, single_index_in, multi_index)
	**** C interface of Fortran subroutine c_MultiIndexToSingleIndex for converting multi-index to single index More...
subroutine	c_c_bf_new2old_row (mshr_Cptr, newidx_loc, oldidx)
	**** C interface of converting from new,local index to old, global index, the indexs start from 1 More...
subroutine	c_c_bf_new2old_col (mshc_Cptr, newidx_loc, oldidx)
	**** C interface of converting from new,local index to old, global index, the indexs start from 1 More...
subroutine	c_c_bpack_construct_init_gram (N, Ndim, Locations, nns, nlevel, tree, Permutation, N_loc, bmat_Cptr, option_Cptr, stats_Cptr, msh_Cptr, ker_Cptr, ptree_Cptr, C_FuncZmn, C_FuncZmnBlock, C_QuantApp)
	**** C interface of matrix construction via entry evaluation and using it for gram distance More...
subroutine	c_c_bpack_construct_matvec_compute (bmat_Cptr, option_Cptr, stats_Cptr, msh_Cptr, ker_Cptr, ptree_Cptr, C_FuncHMatVec, C_QuantApp)
	**** C interface of matrix construction via blackbox matvec More...
subroutine	c_c_bf_construct_init (M, N, M_loc, N_loc, nnsr, nnsc, mshr_Cptr, mshc_Cptr, bf_Cptr, option_Cptr, stats_Cptr, msh_Cptr, ker_Cptr, ptree_Cptr, C_FuncDistmn, C_FuncNearFar, C_QuantApp)
	**** C interface of BF construction via blackbox matvec or entry extraction More...
subroutine	c_c_bf_construct_matvec_compute (bf_Cptr, option_Cptr, stats_Cptr, msh_Cptr, ker_Cptr, ptree_Cptr, C_FuncBMatVec, C_QuantApp)
	**** C interface of BF construction via blackbox matvec More...
subroutine	c_c_bf_construct_element_compute (bf_Cptr, option_Cptr, stats_Cptr, msh_Cptr, ker_Cptr, ptree_Cptr, C_FuncZmn, C_FuncZmnBlock, C_QuantApp)
	**** C interface of BF construction via entry extraction More...
subroutine	c_c_bpack_factor (bmat_Cptr, option_Cptr, stats_Cptr, ptree_Cptr, msh_Cptr)
	**** C interface of BPACK factorization More...
subroutine	c_c_bpack_solve (x, b, Nloc, Nrhs, bmat_Cptr, option_Cptr, stats_Cptr, ptree_Cptr)
	**** C interface of BPACK solve More...
subroutine	c_c_bpack_md_solve (Ndim, x, b, Nloc, Nrhs, bmat_Cptr, option_Cptr, stats_Cptr, ptree_Cptr, msh_Cptr)
	**** C interface of H-tensor solve More...
subroutine	c_c_bpack_tfqmr_noprecon (x, b, Nloc, Nrhs, option_Cptr, stats_Cptr, ptree_Cptr, ker_Cptr, C_FuncHMatVec, C_QuantApp)
	**** C interface of a blackbox tfqmr without preconditioner, or assuming preconditioner is applied in the blackbox matvec More...
subroutine	c_c_bpack_md_tfqmr_noprecon (Ndim, x, b, Nloc, Nrhs, option_Cptr, stats_Cptr, ptree_Cptr, ker_Cptr, C_FuncHMatVec_MD, C_QuantApp)
	**** C interface of a blackbox tfqmr without preconditioner, or assuming preconditioner is applied in the blackbox matvec (tensor) More...
subroutine	c_c_bf_mult (trans, xin, xout, Ninloc, Noutloc, Ncol, bf_for_Cptr, option_Cptr, stats_Cptr, ptree_Cptr)
	**** C interface of butterfly-vector multiplication More...
subroutine	c_c_bf_extractelement (block_Cptr, option_Cptr, msh_Cptr, stats_Cptr, ptree_Cptr, Ninter, Nallrows, Nallcols, Nalldat_loc, allrows, allcols, alldat_loc, rowidx, colidx, pgidx, Npmap, pmaps)
	**** C interface of parallel extraction of a c_list of intersections from a block More...
subroutine	c_c_bpack_extractelement (bmat_Cptr, option_Cptr, msh_Cptr, stats_Cptr, ptree_Cptr, Ninter, Nallrows, Nallcols, Nalldat_loc, allrows, allcols, alldat_loc, rowidx, colidx, pgidx, Npmap, pmaps)
	**** C interface of parallel extraction of a c_list of intersections from a Bmat matrix More...
subroutine	c_c_bpack_mult (trans, xin, xout, Ninloc, Noutloc, Ncol, bmat_Cptr, option_Cptr, stats_Cptr, ptree_Cptr)
	**** C interface of BPACK-vector multiplication More...
subroutine	c_c_bpack_md_mult (Ndim, trans, xin, xout, Ninloc, Noutloc, Ncol, bmat_Cptr, option_Cptr, stats_Cptr, ptree_Cptr, msh_Cptr)
	**** C interface of c_BPACK_MD_Mult for BPACK_MD-vector multiply More...
subroutine	c_c_bpack_inv_mult (trans, xin, xout, Ninloc, Noutloc, Ncol, bmat_Cptr, option_Cptr, stats_Cptr, ptree_Cptr)
	**** C interface of BPACK(inverse)-vector multiplication More...
subroutine	c_c_bpack_deletestats (stats_Cptr)
	**** C interface of deleting statistics More...
subroutine	c_c_bpack_deleteproctree (ptree_Cptr)
	**** C interface of deleting process tree More...
subroutine	c_c_bpack_deletemesh (msh_Cptr)
	**** C interface of deleting c_mesh More...
subroutine	c_c_bpack_deletekernelquant (ker_Cptr)
	**** C interface of deleting c_kernelquant More...
subroutine	c_c_bpack_delete (bmat_Cptr)
	**** C interface of deleting HOBF More...
subroutine	c_c_bf_deletebf (bf_Cptr)
	**** C interface of deleting a BF More...
subroutine	c_c_bpack_deleteoption (option_Cptr)
	**** C interface of deleting c_Hoption More...
subroutine	c_c_bpack_getversionnumber (v_major, v_minor, v_bugfix)
	**** C interface of getting the version number of ButterflyPACK More...
subroutine	c_c_bpack_treeindex_merged2child (idx_merge, idx_child)
	**** C interface of converting the tree index to the index in one of its two child trees More...

Function/Subroutine Documentation

c_bmatvec_user_c()

subroutine c_bpack_wrapper::c_bmatvec_user_c	(	class(*)	ker,
		type(c_matrixblock)	block_o,
		character	trans,
		integer	M,
		integer	N,
		integer	num_vect,
		complex(kind=4), dimension(ldi, *)	Vin,
		integer	ldi,
		complex(kind=4), dimension(ldo, *)	Vout,
		integer	ldo,
		complex(kind=4)	a,
		complex(kind=4)	b,
		type(c_proctree)	ptree,
		type(c_hstat)	stats,
		class(*), optional	operand1
	)

****** Fortran interface for the matvec function required by c_BF_randomized, inside which a c++ function pointer kerC_FuncBMatVec is called
******! It is assumed the kerC_FuncBMatVec does not need ldi and ldo!
******! It is assumed the kerC_FuncBMatVec interfaces with local input and output vectors, which assume already ordered rows/columns

Parameters

ker	the structure containing kernel quantities
block_o	not referenced
trans	'N', 'C' or 'T'
M	(local) row dimension of the block
N	(local) column dimension of the block
num_vect	number of vectors
Vin	input vector
ldi	leading dimension of Vin, needs to be M or N depending on trans
Vout	output vector
ldo	leading dimension of Vout, needs to be M or N depending on trans
a	Vout = a*A*Vin + b*Vout
b	Vout = a*A*Vin + b*Vout
ptree	the structure containing process tree
stats	the structure containing statistics
operand1	not referenced

c_c_bf_construct_element_compute()

subroutine c_bpack_wrapper::c_c_bf_construct_element_compute	(	type(c_ptr)	bf_Cptr,
		type(c_ptr)	option_Cptr,
		type(c_ptr)	stats_Cptr,
		type(c_ptr)	msh_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_ptr)	ptree_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncZmn,
		type(c_funptr), intent(in), target, value	C_FuncZmnBlock,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of BF construction via entry extraction

Parameters

bf_Cptr	the structure containing the block (inout)
option_Cptr	the structure containing option (in)
stats_Cptr	the structure containing statistics (inout)
msh_Cptr	the structure containing points and ordering information (in)
ker_Cptr	the structure containing kernel quantities (inout)
ptree_Cptr	the structure containing process tree (in)
C_FuncZmn	the C_pointer to user-provided function to sample mn^th entry of a block (in)
C_FuncZmnBlock	the C_pointer to user-provided function to extract a c_list of intersections from a block (in)
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)

**** allocate BPACK solver structures

**** delete neighours in msh

**** return the C address of BPACK structures to C caller

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c_c_bf_construct_init()

subroutine c_bpack_wrapper::c_c_bf_construct_init	(	integer	M,
		integer	N,
		integer	M_loc,
		integer	N_loc,
		integer, dimension(*)	nnsr,
		integer, dimension(*)	nnsc,
		type(c_ptr)	mshr_Cptr,
		type(c_ptr)	mshc_Cptr,
		type(c_ptr)	bf_Cptr,
		type(c_ptr)	option_Cptr,
		type(c_ptr)	stats_Cptr,
		type(c_ptr)	msh_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_ptr)	ptree_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncDistmn,
		type(c_funptr), intent(in), target, value	C_FuncNearFar,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of BF construction via blackbox matvec or entry extraction

Parameters

M,N	matrix size (in)
M_loc,N_loc	number of local row/column indices (out)
nnsr	(DIM knn*M) nearest neighbours(indexed from 1 to N) for each row (from 1 to M) provided by user (referenced if nogeo=3 or 4)
nnsc	(DIM knn*N) nearest neighbours(indexed from 1 to M) for each column (from 1 to N) provided by user (referenced if nogeo=3 or 4)
bf_Cptr	the structure containing the block (out)
option_Cptr	the structure containing option (in)
stats_Cptr	the structure containing statistics (inout)
msh_Cptr	the structure containing points and ordering information combined from mshr_Cptr and mshc_Cptr (out)
mshr_Cptr	the structure containing points and ordering information for the row dimension (in)
mshc_Cptr	the structure containing points and ordering information for the column dimension (in)
ker_Cptr	the structure containing kernel quantities (out)
ptree_Cptr	the structure containing process tree (in)
C_FuncDistmn	the C_pointer to user-provided function to compute distance between any row and column of the matrix
C_FuncNearFar	the C_pointer to user-provided function to determine whether a block (in permuted order) is compressible or not
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)

**** allocate BPACK solver structures

**** create a random seed

**** register the user-defined function and type in ker

**** generate mshxyz(1:Dimn,-N:M), needed in KNN

**** construct a c_list of k-nearest neighbours for each point

**** return the C address of BPACK structures to C caller

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c_c_bf_construct_matvec_compute()

subroutine c_bpack_wrapper::c_c_bf_construct_matvec_compute	(	type(c_ptr)	bf_Cptr,
		type(c_ptr)	option_Cptr,
		type(c_ptr)	stats_Cptr,
		type(c_ptr)	msh_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_ptr)	ptree_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncBMatVec,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of BF construction via blackbox matvec

Parameters

bf_Cptr	the structure containing the block (inout)
option_Cptr	the structure containing option (in)
stats_Cptr	the structure containing statistics (inout)
msh_Cptr	the structure containing points and ordering information (in)
ker_Cptr	the structure containing kernel quantities (inout)
ptree_Cptr	the structure containing process tree (in)
C_FuncBMatVec	the C_pointer to user-provided function to multiply A and A* with vectors (in)
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)

**** allocate BPACK solver structures

**** return the C address of BPACK structures to C caller

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c_c_bf_deletebf()

subroutine c_bpack_wrapper::c_c_bf_deletebf

(

type(c_ptr), intent(inout)

bf_Cptr

)

**** C interface of deleting a BF

Parameters

bf_Cptr

the structure containing BF

c_c_bf_extractelement()

subroutine c_bpack_wrapper::c_c_bf_extractelement	(	type(c_ptr), intent(in)	block_Cptr,
		type(c_ptr), intent(in)	option_Cptr,
		type(c_ptr), intent(in)	msh_Cptr,
		type(c_ptr), intent(in)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr,
		integer	Ninter,
		integer	Nallrows,
		integer	Nallcols,
		integer*8	Nalldat_loc,
		integer, dimension(nallrows)	allrows,
		integer, dimension(nallcols)	allcols,
		complex(kind=4), dimension(nalldat_loc), target	alldat_loc,
		integer, dimension(ninter)	rowidx,
		integer, dimension(ninter)	colidx,
		integer, dimension(ninter)	pgidx,
		integer	Npmap,
		integer, dimension(npmap, 3)	pmaps
	)

**** C interface of parallel extraction of a c_list of intersections from a block

Parameters

block_Cptr	the structure containing the block
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree
msh_Cptr	the structure containing points and ordering information
pgidx	1D array containing the process group number of each intersection, the number starts from 0
Npmap	number of process groups
pmaps	2D array (Npmapx3) containing number of process rows, number of process columns, and starting process ID in each intersection
Ninter	number of intersections
allrows	1D array containing the global row indices (in original order starting from 1 to M) stacked together
allcols	1D array containing the global column indices (in original order starting from 1 to N) stacked together
alldat_loc	1D array containing the local entry values defined by pmaps (in column major) stacked together
rowidx	1D array containing sizes of rows of each intersection
colidx	1D array containing sizes of columns of each intersection
Nallrows	total number of rows
Nallcols	total number of columns
Nalldat_loc	total number of local entries

c_c_bf_mult()

subroutine c_bpack_wrapper::c_c_bf_mult	(	character(kind=c_char, len=1), dimension(*)	trans,
		complex(kind=4), dimension(ninloc, ncol)	xin,
		complex(kind=4), dimension(noutloc, ncol)	xout,
		integer	Ninloc,
		integer	Noutloc,
		integer	Ncol,
		type(c_ptr), intent(in)	bf_for_Cptr,
		type(c_ptr), intent(in)	option_Cptr,
		type(c_ptr), intent(in)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr
	)

**** C interface of butterfly-vector multiplication

Parameters

xin	input vector
Ninloc	size of local input vectors
xout	output vector
Noutloc	size of local output vectors
Ncol	number of vectors
bf_for_Cptr	the structure containing butterfly
option_Cptr	the structure containing options
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree
trans	'N', 'C' or 'T'

c_c_bf_new2old_col()

subroutine c_bpack_wrapper::c_c_bf_new2old_col	(	type(c_ptr)	mshc_Cptr,
		integer	newidx_loc,
		integer	oldidx
	)

**** C interface of converting from new,local index to old, global index, the indexs start from 1

Parameters

newidx_loc	new, local index, from 1 to Nloc (in)
oldidx	old, global index, from 1 to N (out)
mshr_Cptr	the structure containing points and ordering information for the column dimension (in)

c_c_bf_new2old_row()

subroutine c_bpack_wrapper::c_c_bf_new2old_row	(	type(c_ptr)	mshr_Cptr,
		integer	newidx_loc,
		integer	oldidx
	)

**** C interface of converting from new,local index to old, global index, the indexs start from 1

Parameters

newidx_loc	new, local index, from 1 to Nloc (in)
oldidx	old, global index, from 1 to N (out)
mshr_Cptr	the structure containing points and ordering information for the row dimension (in)

c_c_bpack_construct_element_compute()

subroutine c_bpack_wrapper::c_c_bpack_construct_element_compute	(	type(c_ptr)	bmat_Cptr,
		type(c_ptr)	option_Cptr,
		type(c_ptr)	stats_Cptr,
		type(c_ptr)	msh_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_ptr)	ptree_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncZmn,
		type(c_funptr), intent(in), target, value	C_FuncZmnBlock,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of matrix construction

Parameters

bmat_Cptr	the structure containing BPACK
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
msh_Cptr	the structure containing points and ordering information
ker_Cptr	the structure containing kernel quantities
ptree_Cptr	the structure containing process tree
C_FuncZmn	the C_pointer to user-provided function to sample mn^th entry of the matrix
C_FuncZmnBlock	the C_pointer to user-provided function to sample a c_list of intersections of entries of the matrix
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)

**** allocate BPACK solver structures

**** register the user-defined function and type in ker

**** computation of the construction phase

**** delete neighours in msh

**** return the C address of BPACK structures to C caller

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c_c_bpack_construct_init()

subroutine c_bpack_wrapper::c_c_bpack_construct_init	(	integer	N,
		integer	Ndim,
		real(kind=8), dimension(*)	Locations,
		integer, dimension(*)	nns,
		integer	nlevel,
		integer, dimension(*)	tree,
		integer, dimension(n)	Permutation,
		integer	N_loc,
		type(c_ptr)	bmat_Cptr,
		type(c_ptr)	option_Cptr,
		type(c_ptr)	stats_Cptr,
		type(c_ptr)	msh_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_ptr)	ptree_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncDistmn,
		type(c_funptr), intent(in), target, value	C_FuncNearFar,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of matrix construction via entry evaluation

Parameters

N	matrix size (in)
Ndim	data set dimensionality (not used if nogeo=1)
Locations	coordinates used for clustering (not used if nogeo=1)
nns	nearest neighbours provided by user (referenced if nogeo=3 or 4)
nlevel	the number of top levels that have been ordered (in)
tree	the order tree provided by the caller, if incomplete, the init routine will make it complete (inout)
Permutation	return the permutation vector new2old (indexed from 1) (out)
N_loc	number of local row/column indices (out)
bmat_Cptr	the structure containing BPACK (out)
option_Cptr	the structure containing option (in)
stats_Cptr	the structure containing statistics (inout)
msh_Cptr	the structure containing points and ordering information (out)
ker_Cptr	the structure containing kernel quantities (out)
ptree_Cptr	the structure containing process tree (in)
C_FuncDistmn	the C_pointer to user-provided function to compute distance between any row and column of the matrix
C_FuncNearFar	the C_pointer to user-provided function to determine whether a block (in permuted order) is compressible or not
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)

**** allocate BPACK solver structures

**** create a random seed

**** register the user-defined function and type in ker

**** make 0-element node a 1-element node

**** the geometry points are provided by user

**** return the permutation vector

**** return the C address of BPACK structures to C caller

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c_c_bpack_construct_init_gram()

subroutine c_bpack_wrapper::c_c_bpack_construct_init_gram	(	integer	N,
		integer	Ndim,
		real(kind=8), dimension(*)	Locations,
		integer, dimension(*)	nns,
		integer	nlevel,
		integer, dimension(*)	tree,
		integer, dimension(n)	Permutation,
		integer	N_loc,
		type(c_ptr)	bmat_Cptr,
		type(c_ptr)	option_Cptr,
		type(c_ptr)	stats_Cptr,
		type(c_ptr)	msh_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_ptr)	ptree_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncZmn,
		type(c_funptr), intent(in), target, value	C_FuncZmnBlock,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of matrix construction via entry evaluation and using it for gram distance

Parameters

N	matrix size (in)
Ndim	data set dimensionality (not used if nogeo=1)
Locations	coordinates used for clustering (not used if nogeo=1)
nns	nearest neighbours provided by user (referenced if nogeo=3 or 4)
nlevel	the number of top levels that have been ordered (in)
tree	the order tree provided by the caller, if incomplete, the init routine will make it complete (inout)
Permutation	return the permutation vector new2old (indexed from 1) (out)
N_loc	number of local row/column indices (out)
bmat_Cptr	the structure containing BPACK (out)
option_Cptr	the structure containing option (in)
stats_Cptr	the structure containing statistics (inout)
msh_Cptr	the structure containing points and ordering information (out)
ker_Cptr	the structure containing kernel quantities (out)
ptree_Cptr	the structure containing process tree (in)
C_FuncZmn	the C_pointer to user-provided function to sample mn^th entry of the matrix
C_FuncZmnBlock	the C_pointer to user-provided function to sample a c_list of intersections of entries of the matrix
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)

**** allocate BPACK solver structures

**** create a random seed

**** register the user-defined function and type in ker

**** make 0-element node a 1-element node

**** the geometry points are provided by user

**** return the permutation vector

**** return the C address of BPACK structures to C caller

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c_c_bpack_construct_matvec_compute()

subroutine c_bpack_wrapper::c_c_bpack_construct_matvec_compute	(	type(c_ptr)	bmat_Cptr,
		type(c_ptr)	option_Cptr,
		type(c_ptr)	stats_Cptr,
		type(c_ptr)	msh_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_ptr)	ptree_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncHMatVec,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of matrix construction via blackbox matvec

Parameters

bmat_Cptr	the structure containing BPACK (inout)
option_Cptr	the structure containing option (in)
stats_Cptr	the structure containing statistics (inout)
msh_Cptr	the structure containing points and ordering information (in)
ker_Cptr	the structure containing kernel quantities (inout)
ptree_Cptr	the structure containing process tree (in)
C_FuncHMatVec	the C_pointer to user-provided function to multiply A and A* with vectors (in)
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)

**** register the user-defined function and type in ker

**** computation of the construction phase

**** return the C address of BPACK structures to C caller

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c_c_bpack_copyoption()

subroutine c_bpack_wrapper::c_c_bpack_copyoption	(	type(c_ptr)	option_Cptr,
		type(c_ptr)	option_Cptr1
	)

**** C interface of copy option

Parameters

option_Cptr	the structure containing option
option_Cptr1	the structure containing option

****copy BPACK options

c_c_bpack_createoption()

subroutine c_bpack_wrapper::c_c_bpack_createoption

(

type(c_ptr)

option_Cptr

)

**** C interface of initializing option

Parameters

option_Cptr

the structure containing option

**** set default BPACK options

c_c_bpack_createptree()

subroutine c_bpack_wrapper::c_c_bpack_createptree	(	integer	nmpi,
		integer, dimension(*)	groupmembers,
		integer	MPIcomm,
		type(c_ptr)	ptree_Cptr
	)

**** C interface of process tree construction

Parameters

nmpi	number of MPIs for one BPACK
MPIcomm	MPI communicator from C caller
groupmembers	MPI ranks in MPIcomm for one BPACK
ptree_Cptr	the structure containing process tree

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c_c_bpack_createstats()

subroutine c_bpack_wrapper::c_c_bpack_createstats

(

type(c_ptr), intent(out)

stats_Cptr

)

**** C interface of initializing statistics

Parameters

stats_Cptr

the structure containing statistics

**** initialize statistics variables

c_c_bpack_delete()

subroutine c_bpack_wrapper::c_c_bpack_delete

(

type(c_ptr), intent(inout)

bmat_Cptr

)

**** C interface of deleting HOBF

Parameters

bmat_Cptr

the structure containing HOBF

c_c_bpack_deletekernelquant()

subroutine c_bpack_wrapper::c_c_bpack_deletekernelquant

(

type(c_ptr), intent(inout)

ker_Cptr

)

**** C interface of deleting c_kernelquant

Parameters

ker_Cptr

the structure containing c_kernelquant

c_c_bpack_deletemesh()

subroutine c_bpack_wrapper::c_c_bpack_deletemesh

(

type(c_ptr), intent(inout)

msh_Cptr

)

**** C interface of deleting c_mesh

Parameters

msh_Cptr

the structure containing c_mesh

c_c_bpack_deleteoption()

subroutine c_bpack_wrapper::c_c_bpack_deleteoption

(

type(c_ptr), intent(inout)

option_Cptr

)

**** C interface of deleting c_Hoption

Parameters

option_Cptr

the structure containing c_Hoption

c_c_bpack_deleteproctree()

subroutine c_bpack_wrapper::c_c_bpack_deleteproctree

(

type(c_ptr), intent(inout)

ptree_Cptr

)

**** C interface of deleting process tree

Parameters

ptree_Cptr

the structure containing process tree

c_c_bpack_deletestats()

subroutine c_bpack_wrapper::c_c_bpack_deletestats

(

type(c_ptr), intent(inout)

stats_Cptr

)

**** C interface of deleting statistics

Parameters

stats_Cptr

the structure containing statistics

c_c_bpack_extractelement()

subroutine c_bpack_wrapper::c_c_bpack_extractelement	(	type(c_ptr), intent(in)	bmat_Cptr,
		type(c_ptr), intent(in)	option_Cptr,
		type(c_ptr), intent(in)	msh_Cptr,
		type(c_ptr), intent(in)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr,
		integer	Ninter,
		integer	Nallrows,
		integer	Nallcols,
		integer*8	Nalldat_loc,
		integer, dimension(nallrows)	allrows,
		integer, dimension(nallcols)	allcols,
		complex(kind=4), dimension(nalldat_loc), target	alldat_loc,
		integer, dimension(ninter)	rowidx,
		integer, dimension(ninter)	colidx,
		integer, dimension(ninter)	pgidx,
		integer	Npmap,
		integer, dimension(npmap, 3)	pmaps
	)

**** C interface of parallel extraction of a c_list of intersections from a Bmat matrix

Parameters

Ninter	number of intersections
allrows	1D array containing the global row indices (in original order starting from 0) stacked together
allcols	1D array containing the global column indices (in original order starting from 0) stacked together
alldat_loc	1D array containing the local entry values defined by pmaps (in column major) stacked together
rowidx	1D array containing sizes of rows of each intersection
colidx	1D array containing sizes of columns of each intersection
pgidx	1D array containing the process group number of each intersection, the number starts from 0
Npmap	number of process groups
pmaps	2D array (Npmapx3) containing number of process rows, number of process columns, and starting process ID in each intersection
bmat_Cptr	the structure containing BPACK
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree
msh_Cptr	the structure containing points and ordering information
Nallrows	total number of rows
Nallcols	total number of columns
Nalldat_loc	total number of local entries

c_c_bpack_factor()

subroutine c_bpack_wrapper::c_c_bpack_factor	(	type(c_ptr), intent(inout)	bmat_Cptr,
		type(c_ptr)	option_Cptr,
		type(c_ptr), intent(inout)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr,
		type(c_ptr), intent(in)	msh_Cptr
	)

**** C interface of BPACK factorization

Parameters

bmat_Cptr	the structure containing BPACK
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree
msh_Cptr	the structure containing points and ordering information (in)

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c_c_bpack_getoption()

subroutine c_bpack_wrapper::c_c_bpack_getoption	(	type(c_ptr)	option_Cptr,
		character(kind=c_char, len=1), dimension(*)	nam,
		real(kind=8)	val_d
	)

**** C interface of getting one entry in option, always returning double

Parameters

option_Cptr	the structure containing option
nam	name of the option
val_d	value of the option

c_c_bpack_getstats()

subroutine c_bpack_wrapper::c_c_bpack_getstats	(	type(c_ptr)	stats_Cptr,
		character(kind=c_char, len=1), dimension(*)	nam,
		real(kind=8)	val_d
	)

**** C interface of getting one entry in stats

Parameters

stats_Cptr	the structure containing stats
nam	name of the stats
val_d	value of the stats

c_c_bpack_getversionnumber()

subroutine c_bpack_wrapper::c_c_bpack_getversionnumber	(	integer	v_major,
		integer	v_minor,
		integer	v_bugfix
	)

**** C interface of getting the version number of ButterflyPACK

Parameters

v_major	major version number
v_minor	minor version number
v_bugfix	bugfix version number

c_c_bpack_inv_mult()

subroutine c_bpack_wrapper::c_c_bpack_inv_mult	(	character(kind=c_char, len=1), dimension(*)	trans,
		complex(kind=4), dimension(ninloc, ncol)	xin,
		complex(kind=4), dimension(noutloc, ncol)	xout,
		integer	Ninloc,
		integer	Noutloc,
		integer	Ncol,
		type(c_ptr), intent(in)	bmat_Cptr,
		type(c_ptr), intent(in)	option_Cptr,
		type(c_ptr), intent(in)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr
	)

**** C interface of BPACK(inverse)-vector multiplication

Parameters

xin	input vector
Ninloc	size of local input vectors
xout	output vector
Noutloc	size of local output vectors
Ncol	number of vectors
bmat_Cptr	the structure containing BPACK
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree
trans	'C', 'T' or 'N'

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c_c_bpack_md_construct_element_compute()

subroutine c_bpack_wrapper::c_c_bpack_md_construct_element_compute	(	integer	Ndim,
		type(c_ptr)	bmat_Cptr,
		type(c_ptr)	option_Cptr,
		type(c_ptr)	stats_Cptr,
		type(c_ptr)	msh_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_ptr)	ptree_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncZmn_MD,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of tensor construction

Parameters

Ndim	data dimensionality (in)
bmat_Cptr	the structure containing the hierarchical tensors
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
msh_Cptr	the structure containing points and ordering information
ker_Cptr	the structure containing kernel quantities
ptree_Cptr	the structure containing process tree
C_FuncZmn_MD	the C_pointer to user-provided function to sample mn^th entry of the tensor
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)

**** allocate BPACK solver structures

**** register the user-defined function and type in ker

**** computation of the construction phase

**** delete neighours in msh

**** return the C address of BPACK structures to C caller

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c_c_bpack_md_construct_init()

subroutine c_bpack_wrapper::c_c_bpack_md_construct_init	(	integer, dimension(ndim)	Ns,
		integer	Nmax,
		integer	Ndim,
		real(kind=8), dimension(*)	Locations,
		integer, dimension(nmax*ndim)	Permutation,
		integer, dimension(ndim)	N_loc,
		type(c_ptr)	bmat_Cptr,
		type(c_ptr)	option_Cptr,
		type(c_ptr)	stats_Cptr,
		type(c_ptr)	msh_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_ptr)	ptree_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncNearFar_MD,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of multi-dimensional BF construction via entry evaluation

Parameters

Ns	size for each dimension (in)
Nmax	maximum size among all dimensions (in)
Ndim	data set dimensionality (in)
Locations	coordinates (1D coordinates per dimension) used for clustering (in)
Permutation	return the permutation vector (per dimension) new2old (indexed from 1) (out)
N_loc	number of local row/column indices (per dimension) (out)
bmat_Cptr	the structure containing the compressed operator (out)
option_Cptr	the structure containing option (in)
stats_Cptr	the structure containing statistics (inout)
msh_Cptr	the structure containing points and ordering information per dimension (out)
ker_Cptr	the structure containing kernel quantities (out)
ptree_Cptr	the structure containing process tree (in)
C_FuncNearFar_MD	the C_pointer to user-provided function to determine whether a block (in permuted order) is compressible or not
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)

**** allocate BPACK solver structures

**** create a random seed

**** register the user-defined function and type in ker

**** the geometry points are provided by user

**** return the permutation vector

**** return the C address of BPACK structures to C caller

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c_c_bpack_md_mult()

subroutine c_bpack_wrapper::c_c_bpack_md_mult	(	integer	Ndim,
		character(kind=c_char, len=1), dimension(*)	trans,
		complex(kind=4), dimension(product(ninloc), ncol)	xin,
		complex(kind=4), dimension(product(noutloc), ncol)	xout,
		integer, dimension(ndim)	Ninloc,
		integer, dimension(ndim)	Noutloc,
		integer	Ncol,
		type(c_ptr), intent(in)	bmat_Cptr,
		type(c_ptr), intent(in)	option_Cptr,
		type(c_ptr), intent(in)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr,
		type(c_ptr)	msh_Cptr
	)

**** C interface of c_BPACK_MD_Mult for BPACK_MD-vector multiply

Parameters

Ndim	dimensionality of the kernel
xin	input vector
Ninloc	size of local input vectors
xout	output vector
Noutloc	size of local output vectors
Ncol	number of vectors
bmat_Cptr	the structure containing BPACK
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree
msh_Cptr	the structure containing points and ordering information
trans	'N', 'C' or 'T'

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c_c_bpack_md_new2old()

subroutine c_bpack_wrapper::c_c_bpack_md_new2old	(	integer	Ndim,
		type(c_ptr)	msh_Cptr,
		integer, dimension(ndim)	newidx_loc,
		integer, dimension(ndim)	oldidx
	)

**** C interface of converting from new,local index to old, global index, the indexs start from 1. Both newidx_loc and oldidx are Ndim dimensional.

Parameters

newidx_loc	new, local index, from 1 to Nloc
oldidx	old, global index, from 1 to N (out)
msh_Cptr	the structure containing points and ordering information

c_c_bpack_md_solve()

subroutine c_bpack_wrapper::c_c_bpack_md_solve	(	integer	Ndim,
		complex(kind=4), dimension(product(nloc), nrhs)	x,
		complex(kind=4), dimension(product(nloc), nrhs)	b,
		integer, dimension(ndim)	Nloc,
		integer	Nrhs,
		type(c_ptr), intent(in)	bmat_Cptr,
		type(c_ptr), intent(in)	option_Cptr,
		type(c_ptr), intent(in)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr,
		type(c_ptr), intent(in)	msh_Cptr
	)

**** C interface of H-tensor solve

Parameters

Ndim	dimensionality
x	local solution vector
b	local RHS
Nloc	size of local RHS
Nrhs	number of RHSs
bmat_Cptr	the structure containing H-tensor
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree
msh_Cptr	the structure containing points and ordering information

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c_c_bpack_md_tfqmr_noprecon()

subroutine c_bpack_wrapper::c_c_bpack_md_tfqmr_noprecon	(	integer	Ndim,
		complex(kind=4), dimension(product(nloc), nrhs)	x,
		complex(kind=4), dimension(product(nloc), nrhs)	b,
		integer, dimension(ndim)	Nloc,
		integer	Nrhs,
		type(c_ptr), intent(in)	option_Cptr,
		type(c_ptr), intent(in)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncHMatVec_MD,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of a blackbox tfqmr without preconditioner, or assuming preconditioner is applied in the blackbox matvec (tensor)

Parameters

x	local solution vector
b	local RHS
Nloc	size of local RHS
Nrhs	number of RHSs
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)
ker_Cptr	the structure containing kernel quantities
C_FuncHMatVec_MD	the C_pointer to user-provided function to multiply A and A* with vectors (in)

**** register the user-defined function and type in ker

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c_c_bpack_mult()

subroutine c_bpack_wrapper::c_c_bpack_mult	(	character(kind=c_char, len=1), dimension(*)	trans,
		complex(kind=4), dimension(ninloc, ncol)	xin,
		complex(kind=4), dimension(noutloc, ncol)	xout,
		integer	Ninloc,
		integer	Noutloc,
		integer	Ncol,
		type(c_ptr), intent(in)	bmat_Cptr,
		type(c_ptr), intent(in)	option_Cptr,
		type(c_ptr), intent(in)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr
	)

**** C interface of BPACK-vector multiplication

Parameters

xin	input vector
Ninloc	size of local input vectors
xout	output vector
Noutloc	size of local output vectors
Ncol	number of vectors
bmat_Cptr	the structure containing BPACK
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree
trans	'N', 'C' or 'T'

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c_c_bpack_new2old()

subroutine c_bpack_wrapper::c_c_bpack_new2old	(	type(c_ptr)	msh_Cptr,
		integer	newidx_loc,
		integer	oldidx
	)

**** C interface of converting from new,local index to old, global index, the indexs start from 1

Parameters

newidx_loc	new, local index, from 1 to Nloc
oldidx	old, global index, from 1 to N (out)
msh_Cptr	the structure containing points and ordering information

c_c_bpack_printoption()

subroutine c_bpack_wrapper::c_c_bpack_printoption	(	type(c_ptr)	option_Cptr,
		type(c_ptr)	ptree_Cptr
	)

**** C interface of printing option

Parameters

option_Cptr	the structure containing option
ptree_Cptr	the structure containing process tree

c_c_bpack_printstats()

subroutine c_bpack_wrapper::c_c_bpack_printstats	(	type(c_ptr)	stats_Cptr,
		type(c_ptr)	ptree_Cptr
	)

**** C interface of printing statistics

Parameters

stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree

**** print statistics variables

c_c_bpack_setoption()

subroutine c_bpack_wrapper::c_c_bpack_setoption	(	type(c_ptr)	option_Cptr,
		character(kind=c_char, len=1), dimension(*)	nam,
		type(c_ptr), value	val_Cptr
	)

**** C interface of set one entry in option

Parameters

option_Cptr	the structure containing option
nam	name of the option
val_Cptr	value of the option

**** integer parameters

**** double parameters

c_c_bpack_solve()

subroutine c_bpack_wrapper::c_c_bpack_solve	(	complex(kind=4), dimension(nloc, nrhs)	x,
		complex(kind=4), dimension(nloc, nrhs)	b,
		integer	Nloc,
		integer	Nrhs,
		type(c_ptr), intent(in)	bmat_Cptr,
		type(c_ptr), intent(in)	option_Cptr,
		type(c_ptr), intent(in)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr
	)

**** C interface of BPACK solve

Parameters

x	local solution vector
b	local RHS
Nloc	size of local RHS
Nrhs	number of RHSs
bmat_Cptr	the structure containing BPACK
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree

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c_c_bpack_tfqmr_noprecon()

subroutine c_bpack_wrapper::c_c_bpack_tfqmr_noprecon	(	complex(kind=4), dimension(nloc, nrhs)	x,
		complex(kind=4), dimension(nloc, nrhs)	b,
		integer	Nloc,
		integer	Nrhs,
		type(c_ptr), intent(in)	option_Cptr,
		type(c_ptr), intent(in)	stats_Cptr,
		type(c_ptr), intent(in)	ptree_Cptr,
		type(c_ptr)	ker_Cptr,
		type(c_funptr), intent(in), target, value	C_FuncHMatVec,
		type(c_ptr), intent(in), target	C_QuantApp
	)

**** C interface of a blackbox tfqmr without preconditioner, or assuming preconditioner is applied in the blackbox matvec

Parameters

x	local solution vector
b	local RHS
Nloc	size of local RHS
Nrhs	number of RHSs
option_Cptr	the structure containing option
stats_Cptr	the structure containing statistics
ptree_Cptr	the structure containing process tree
C_QuantApp	the C_pointer to user-defined quantities required to for entry evaluation,sampling,distance and compressibility test (in)
ker_Cptr	the structure containing kernel quantities
C_FuncHMatVec	the C_pointer to user-provided function to multiply A and A* with vectors (in)

**** register the user-defined function and type in ker

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c_c_bpack_treeindex_merged2child()

subroutine c_bpack_wrapper::c_c_bpack_treeindex_merged2child	(	integer	idx_merge,
		integer	idx_child
	)

**** C interface of converting the tree index to the index in one of its two child trees

Parameters

idx_merge	node number in the parent tree
idx_child	node number in one of the two child trees

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c_c_multiindextosingleindex()

subroutine c_bpack_wrapper::c_c_multiindextosingleindex	(	integer	Ndim,
		integer, dimension(ndim)	dims,
		integer	single_index_in,
		integer, dimension(ndim)	multi_index
	)

**** C interface of Fortran subroutine c_MultiIndexToSingleIndex for converting multi-index to single index

Parameters

Ndim	dimensionality
dims(Ndim)	size of each dimension
single_index_in	single index
multi_index(Ndim)	multi_index **** convert single index to multi-index, assuming first index is the fastest

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c_c_singleindextomultiindex()

subroutine c_bpack_wrapper::c_c_singleindextomultiindex	(	integer	Ndim,
		integer, dimension(ndim)	dims,
		integer	single_index_in,
		integer, dimension(ndim)	multi_index
	)

**** C interface of Fortran subroutine c_SingleIndexToMultiIndex for converting single index to multi-index

Parameters

Ndim	dimensionality
dims(Ndim)	size of each dimension
single_index_in	single index
multi_index(Ndim)	multi_index **** convert single index to multi-index, assuming first index is the fastest

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c_matvec_user_c()

subroutine c_bpack_wrapper::c_matvec_user_c	(	character	trans,
		integer, intent(in)	M,
		integer, intent(in)	N,
		integer, intent(in)	num_vect,
		complex(kind=4), dimension(:, :)	Vin,
		complex(kind=4), dimension(:, :)	Vout,
		type(c_kernelquant)	ker
	)

****** Fortran interface for the matvec function required by c_BPACK_construction_Matvec, inside which a c++ function pointer kerC_FuncHMatVec is called
******! It is assumed the kerC_FuncHMatVec interfaces with local input and output vectors, which assume an already ordered hierarchical matrix

Parameters

ker	the structure containing kernel quantities
Vin	input vector
Vout	output vector
M	(local) row dimension of the matrix
N	(local) column dimension of the matrix
trans	'N', 'C' or 'T'
num_vect	number of vectors

c_matvec_user_c_md()

subroutine c_bpack_wrapper::c_matvec_user_c_md	(	integer	Ndim,
		character	trans,
		integer, dimension(ndim), intent(in)	M,
		integer, dimension(ndim), intent(in)	N,
		integer, intent(in)	num_vect,
		complex(kind=4), dimension(:, :)	Vin,
		complex(kind=4), dimension(:, :)	Vout,
		type(c_kernelquant)	ker
	)

****** Fortran interface for the matvec function required by c_BPACK_construction_Matvec, inside which a c++ function pointer kerC_FuncHMatVec is called
******! It is assumed the kerC_FuncHMatVec interfaces with local input and output vectors, which assume an already ordered hierarchical matrix

Parameters

ker	the structure containing kernel quantities
Vin	input vector
Vout	output vector
M	(local) row dimension of the matrix
N	(local) column dimension of the matrix
trans	'N', 'C' or 'T'
num_vect	number of vectors