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psblas3/base/modules/aux/psb_string_mod.f90

133 lines
3.9 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.
!
!
module psb_string_mod
use psb_const_mod, only : psb_ipk_
public psb_tolower, psb_toupper, psb_touppers
interface psb_tolower
module procedure psb_tolowerc
end interface
interface psb_toupper
module procedure psb_toupperc
end interface
interface psb_touppers
module procedure psb_sub_toupperc
end interface
private
character(len=*), parameter :: lcase='abcdefghijklmnopqrstuvwxyz'
character(len=*), parameter :: ucase='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
contains
function idx_bsrch(key,v) result(ipos)
implicit none
integer(psb_ipk_) :: ipos
character key
character(len=*) v
integer(psb_ipk_) :: lb, ub, m
lb = 1
ub = len(v)
ipos = 0
do
if (lb > ub) exit
m = (lb+ub)/2
if (key.eq.v(m:m)) then
ipos = m
exit
else if (key.lt.v(m:m)) then
ub = m-1
else
lb = m + 1
end if
enddo
return
end function idx_bsrch
function psb_tolowerc(string)
character(len=*), intent(in) :: string
character(len=len(string)) :: psb_tolowerc
integer(psb_ipk_) :: i,k
do i=1,len(string)
k = idx_bsrch(string(i:i),ucase)
if (k /= 0) then
psb_tolowerc(i:i) = lcase(k:k)
else
psb_tolowerc(i:i) = string(i:i)
end if
enddo
end function psb_tolowerc
function psb_toupperc(string)
character(len=*), intent(in) :: string
character(len=len(string)) :: psb_toupperc
integer(psb_ipk_) :: i,k
do i=1,len(string)
k = idx_bsrch(string(i:i),lcase)
if (k /= 0) then
psb_toupperc(i:i) = ucase(k:k)
else
psb_toupperc(i:i) = string(i:i)
end if
enddo
end function psb_toupperc
subroutine psb_sub_toupperc(string,strout)
character(len=*), intent(in) :: string
character(len=*), intent(out) :: strout
integer(psb_ipk_) :: i,k
do i=1,len(string)
k = idx_bsrch(string(i:i),lcase)
if (k /= 0) then
strout(i:i) = ucase(k:k)
else
strout(i:i) = string(i:i)
end if
enddo
end subroutine psb_sub_toupperc
end module psb_string_mod