!!$ 
!!$              Parallel Sparse BLAS  v2.0
!!$    (C) Copyright 2006 Salvatore Filippone    University of Rome Tor Vergata
!!$                       Alfredo Buttari        University of Rome Tor Vergata
!!$ 
!!$  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
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!!$ 
!!$  
! File:  psb_dcsmv.f90 
! Subroutine: 
! Parameters:

subroutine psb_dcsmv(alpha,a,b,beta,c,info,trans)
  use psb_spmat_type
  implicit none 

  type(psb_dspmat_type) :: a
  real(kind(1.d0))      :: alpha, beta, b(:), c(:)
  integer               :: info
  character, optional   :: trans
  
  real(kind(1.d0)), allocatable :: work(:)
  character :: trans_
  integer   :: iwsz,m,n,k,lb,lc, err_act
  character(len=20) :: name

  name='psb_dcsmv'
  info  = 0
  call psb_erractionsave(err_act)
  
  if (present(trans)) then 
    trans_ = trans
  else
    trans_ = 'N'
  endif

  if (trans_=='N') then 
    m = a%m
    k = a%k
  else
    k = a%m
    m = a%k
  end if
  n  = 1
  lb = size(b,1)
  lc = size(c,1)
  iwsz = 2*m*n
  allocate(work(iwsz))
  
  call dcsmm(trans_,m,n,k,alpha,&
       & a%pl,a%fida,a%descra,a%aspk,a%ia1,a%ia2,a%infoa,a%pr,&
       & b,lb,beta,c,lc,work,iwsz,info)
  
  deallocate(work)
  call psb_erractionrestore(err_act)

  if(info.ne.0) then
     if (err_act.eq.act_abort) then
        call psb_error()
        return
     end if
  end if
     
  return

end subroutine psb_dcsmv