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psblas3/base/internals/psi_exist_ovr_elem.f90

74 lines
2.9 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006, 2010, 2015, 2017
! Salvatore Filippone Cranfield University
! Alfredo Buttari CNRS-IRIT, Toulouse
!
! Redistribution and use in source and binary forms, with or without
! modification, are permitted provided that the following conditions
! are met:
! 1. Redistributions of source code must retain the above copyright
! notice, this list of conditions and the following disclaimer.
! 2. Redistributions in binary form must reproduce the above copyright
! notice, this list of conditions, and the following disclaimer in the
! documentation and/or other materials provided with the distribution.
! 3. The name of the PSBLAS group or the names of its contributors may
! not be used to endorse or promote products derived from this
! software without specific written permission.
!
! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
! ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! POSSIBILITY OF SUCH DAMAGE.
!
!
integer function psi_exist_ovr_elem(ovr_elem, dim_list,elem_searched)
use psb_const_mod
! PURPOSE:
! == = ====
!
! If ELEM_SEARCHED exist in the list OVR_ELEM returns its position in
! the list, else returns -1
!
!
! INPUT
! == = ===
! OVRLAP_ELEMENT_D.: Contains for all overlap points belonging to
! the current process:
! 1. overlap point index
! 2. Number of domains sharing that overlap point
! the end is marked by a -1...............................
!
! DIM_LIST..........: Dimension of list OVRLAP_ELEMENT_D
!
! ELEM_SEARCHED.....:point's Local index identifier to be searched.
implicit none
! ....Scalars parameters....
integer(psb_ipk_) :: dim_list,elem_searched
! ...array parameters....
integer(psb_ipk_) :: ovr_elem(dim_list,*)
! ...local scalars....
integer(psb_ipk_) :: i
i=1
do while ((i.le.dim_list).and.(ovr_elem(i,1).ne.elem_searched))
i=i+1
enddo
if ((i.le.dim_list).and.(ovr_elem(i,1).eq.elem_searched)) then
psi_exist_ovr_elem=i
else
psi_exist_ovr_elem=-1
endif
end function psi_exist_ovr_elem