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!
! Copyright (C) 2002-2004 Quantum ESPRESSO group
! This file is distributed under the terms of the
! GNU General Public License. See the file `License'
! in the root directory of the present distribution,
! or http://www.gnu.org/copyleft/gpl.txt .
!
!------------------------------------------------------------------------------!
MODULE kinds
!------------------------------------------------------------------------------!
!
IMPLICIT NONE
SAVE
! ... kind definitions
INTEGER, PARAMETER :: DP = selected_real_kind(14,200)
INTEGER, PARAMETER :: sgl = selected_real_kind(6,30)
INTEGER, PARAMETER :: i4b = selected_int_kind(9)
INTEGER, PARAMETER :: i8b = selected_int_kind(18)
PRIVATE
PUBLIC :: i4b, i8b, sgl, DP, print_kind_info
!
!------------------------------------------------------------------------------!
CONTAINS
!------------------------------------------------------------------------------!
!
!! Print information about the used data types.
!
SUBROUTINE print_kind_info (stdout)
!--------------------------------------------------------------------------!
!
IMPLICIT NONE
INTEGER, INTENT(IN) :: stdout
!
WRITE(stdout,'(/,T2,A)') 'DATA TYPE INFORMATION:'
!
WRITE(stdout,'(/,T2,A,T78,A,2(/,T2,A,T75,I6),3(/,T2,A,T67,E14.8))') &
'REAL: Data type name:', 'DP', ' Kind value:', kind(0.0_DP), &
' Precision:', precision(0.0_DP), &
' Smallest nonnegligible quantity relative to 1:', &
epsilon(0.0_DP), ' Smallest positive number:', tiny(0.0_DP), &
' Largest representable number:', huge(0.0_DP)
WRITE(stdout,'(/,T2,A,T78,A,2(/,T2,A,T75,I6),3(/,T2,A,T67,E14.8))') &
' Data type name:', 'sgl', ' Kind value:', kind(0.0_sgl), &
' Precision:', precision(0.0_sgl), &
' Smallest nonnegligible quantity relative to 1:', &
epsilon(0.0_sgl), ' Smallest positive number:', tiny(0.0_sgl), &
' Largest representable number:', huge(0.0_sgl)
WRITE(stdout,'(/,T2,A,T72,A,4(/,T2,A,T61,I20))') &
'INTEGER: Data type name:', '(default)', ' Kind value:', &
kind(0), ' Bit size:', bit_size(0), &
' Largest representable number:', huge(0)
WRITE(stdout,'(/,T2,A,T72,A,/,T2,A,T75,I6,/)') 'LOGICAL: Data type name:', &
'(default)', ' Kind value:', kind(.TRUE.)
WRITE(stdout,'(/,T2,A,T72,A,/,T2,A,T75,I6,/)') &
'CHARACTER: Data type name:', '(default)', ' Kind value:', &
kind('C')
!
END SUBROUTINE print_kind_info
!------------------------------------------------------------------------------!
END MODULE kinds
!------------------------------------------------------------------------------!
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