convert_case.F90
4.11 KB
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!
! This file is part of SACAMOS, State of the Art CAble MOdels for Spice.
! It was developed by the University of Nottingham and the Netherlands Aerospace
! Centre (NLR) for ESA under contract number 4000112765/14/NL/HK.
!
! Copyright (C) 2016-2018 University of Nottingham
!
! SACAMOS is free software: you can redistribute it and/or modify it under the
! terms of the GNU General Public License as published by the Free Software
! Foundation, either version 3 of the License, or (at your option) any later
! version.
!
! SACAMOS is distributed in the hope that it will be useful, but
! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! for more details.
!
! A copy of the GNU General Public License version 3 can be found in the
! file GNU_GPL_v3 in the root or at <http://www.gnu.org/licenses/>.
!
! SACAMOS uses the EISPACK library (in /SRC/EISPACK). EISPACK is subject to
! the GNU Lesser General Public License. A copy of the GNU Lesser General Public
! License version can be found in the file GNU_LGPL in the root of EISPACK
! (/SRC/EISPACK ) or at <http://www.gnu.org/licenses/>.
!
! The University of Nottingham can be contacted at: ggiemr@nottingham.ac.uk
!
!
! NAME
! convert_to_lower_case
!
! DESCRIPTION
! returns the input string with all characters converted to lower case
!
! HISTORY
!
! started 10/02/09 CJS
!
! COMMENTS
!
SUBROUTINE convert_to_lower_case(input_string,input_string_length)
IMPLICIT NONE
! variables passed to subroutine
integer,intent(IN) :: input_string_length
character(LEN=input_string_length),intent(INOUT) :: input_string
! local variables
character(LEN=input_string_length) :: output_string ! local output string
integer :: i ! loop variable
integer :: na,nCA,nz,nCZ,diff ! character numbers of lower case a, upper case A, lower case z, upper case Z
integer :: c ! character number
! START
na=IACHAR('a')
nCA=IACHAR('A')
nz=IACHAR('z')
nCZ=IACHAR('Z')
diff=na-nCA ! diff is the difference in character number between lower case and upper case i.e. what has to be added to convert to lower case
do i=1,input_string_length
c=IACHAR(input_string(i:i))
if ((c.ge.nCA).AND.(c.le.nCZ)) then ! this is an upper case character which needs conversions
c=c+diff
output_string(i:i)=ACHAR(c)
else
output_string(i:i)=input_string(i:i) ! this is not an upper case so leave this alone
end if
end do
! copy the output string to the input string
input_string=output_string
RETURN
END SUBROUTINE convert_to_lower_case
!
! NAME
! convert_to_upper_case
!
! DESCRIPTION
! returns the input string with all characters converted to upper case
!
! HISTORY
!
! started 26/02/09 CJS
!
! COMMENTS
!
SUBROUTINE convert_to_upper_case(input_string,input_string_length)
IMPLICIT NONE
! variables passed to subroutine
integer,intent(IN) :: input_string_length
character(LEN=input_string_length),intent(INOUT) :: input_string
! local variables
character(LEN=input_string_length) :: output_string ! local output string
integer :: i ! loop variable
integer :: na,nCA,nz,nCZ,diff ! character numbers of lower case a, upper case A, lower case z, upper case Z
integer :: c ! character number
! START
na=IACHAR('a')
nCA=IACHAR('A')
nz=IACHAR('z')
nCZ=IACHAR('Z')
diff=nCA-na ! diff is the difference in character number between lower case and upper case i.e. what has to be added to convert to upper case
do i=1,input_string_length
c=IACHAR(input_string(i:i))
if ((c.ge.na).AND.(c.le.nz)) then ! this is a lower case character which needs conversions
c=c+diff
output_string(i:i)=ACHAR(c)
else
output_string(i:i)=input_string(i:i) ! this is not a lower case so leave this alone
end if
end do
! copy the output string to the input string
input_string=output_string
RETURN
END SUBROUTINE convert_to_upper_case