Provides kind type parameter values. More...

Variables
integer, parameter, public	sp = C_FLOAT
	Single Precision Real number.
real(sp), parameter, public	sp_eps = EPSILON(0.0e0)
	Machine epsilon for single precision real number.
integer, parameter, public	dp = C_DOUBLE
	Double Precision Real number
real(dp), parameter, public	dp_eps = EPSILON(0.0d0)
	Machine epsilon for dobule precision real number.
integer, parameter, public	i4 = C_INT
	Single Precision Ineger, same as 'integer'
integer, parameter, public	i8 = C_LONG_LONG
	Double Precision Ineger, same as 'integer(8)'
integer, parameter, public	stdin = INPUT_UNIT
	Unit number for Standard INPUT
integer, parameter, public	stdout = OUTPUT_UNIT
	Unit number for Standard OUTPUT
integer, parameter, public	stderr = ERROR_UNIT
	Unit number for Standard ERROR
integer, parameter, public	token = 32
	Character length for word, token
integer, parameter, public	string = 256
	Character length for string

Detailed Description

Provides kind type parameter values.

Author: Youhei SASAKI, Yasuhiro MORIKAWA, Eizi TOYODA

Copyright: Copyright (C) GFD Dennou Club, 2000-2026. All rights reserved.
License is BSD-2-Clause. see COPYRIGHT in detail

This module using F2003 feature, especially ISO_C_BINDING, ISO_FORTRAN_ENV.

dc_types	intrinsic modules	types
SP	ISO_C_BINDING	C_FLOAT
DP	ISO_C_BINDING	C_DOUBLE
I4	ISO_C_BINDING	C_INT
I8	ISO_C_BINDING	C_LONG_LONG
STDIN	ISO_FORTRAN_ENV	INPUT_UNIT
STDOUT	ISO_FORTRAN_ENV	OUTPUT_UNIT
STRERR	ISO_FORTRAN_ENV	ERROR_UNIT

Warning: If you want to try mixed-language programing (e.g., Fortran calling C function), Please check type of variables before use this module.

Note: When supporting F2008, it is planned to change from I4 → int32, I8 → int64

Variable Documentation

◆ dp

integer, parameter, public dc_types::dp = C_DOUBLE

Double Precision Real number

Definition at line 92 of file dc_types.f90.

92 integer, parameter :: DP = c_double

◆ dp_eps

real(dp), parameter, public dc_types::dp_eps = EPSILON(0.0d0)

Machine epsilon for dobule precision real number.

Definition at line 97 of file dc_types.f90.

97 real(DP), parameter :: DP_EPS = epsilon(0.0d0)

◆ i4

integer, parameter, public dc_types::i4 = C_INT

Single Precision Ineger, same as 'integer'

Definition at line 102 of file dc_types.f90.

102 integer, parameter :: I4 = c_int

◆ i8

integer, parameter, public dc_types::i8 = C_LONG_LONG

Double Precision Ineger, same as 'integer(8)'

Definition at line 107 of file dc_types.f90.

107 integer, parameter :: I8 = c_long_long

◆ sp

integer, parameter, public dc_types::sp = C_FLOAT

Single Precision Real number.

Definition at line 82 of file dc_types.f90.

82 integer, parameter :: SP = c_float

◆ sp_eps

real(sp), parameter, public dc_types::sp_eps = EPSILON(0.0e0)

Machine epsilon for single precision real number.

Definition at line 87 of file dc_types.f90.

87 real(SP), parameter :: SP_EPS = epsilon(0.0e0)

◆ stderr

integer, parameter, public dc_types::stderr = ERROR_UNIT

Unit number for Standard ERROR

Definition at line 122 of file dc_types.f90.

122 integer, parameter :: STDERR = error_unit

◆ stdin

integer, parameter, public dc_types::stdin = INPUT_UNIT

Unit number for Standard INPUT

Definition at line 112 of file dc_types.f90.

112 integer, parameter :: STDIN = input_unit

◆ stdout

integer, parameter, public dc_types::stdout = OUTPUT_UNIT

Unit number for Standard OUTPUT

Definition at line 117 of file dc_types.f90.

117 integer, parameter :: STDOUT = output_unit

◆ string

integer, parameter, public dc_types::string = 256

Character length for string

Definition at line 137 of file dc_types.f90.

137 integer, parameter :: STRING = 256

◆ token

integer, parameter, public dc_types::token = 32

Character length for word, token

Definition at line 128 of file dc_types.f90.

128 integer, parameter :: TOKEN = 32

Variables