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psblas3/base/internals/psi_exist_ovr_elem.f

75 lines
2.9 KiB
Fortran

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