libsim Versione 7.2.6

◆ int_b

integer, parameter int_b = SELECTED_INT_KIND(1)

1-byte integer (byte)

Definizione alla linea 248 del file kinds.F90.

248! Copyright (C) 2010 ARPA-SIM <urpsim@smr.arpa.emr.it>
249! authors:
250! Davide Cesari <dcesari@arpa.emr.it>
251! Paolo Patruno <ppatruno@arpa.emr.it>
252
253! This program is free software; you can redistribute it and/or
254! modify it under the terms of the GNU General Public License as
255! published by the Free Software Foundation; either version 2 of
256! the License, or (at your option) any later version.
257
258! This program is distributed in the hope that it will be useful,
259! but WITHOUT ANY WARRANTY; without even the implied warranty of
260! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
261! GNU General Public License for more details.
262
263! You should have received a copy of the GNU General Public License
264! along with this program. If not, see <http://www.gnu.org/licenses/>.
265#include "config.h"
266!> \defgroup base Libsim package, base library.
267!! The libsim base library defines modules and classes of general
268!! use for scientifical applications in Fortran 90. In order to
269!! compile and link programs using this library, you have to insert
270!! the required \c USE statements in the program units involved,
271!! specify the location of module files when compiling (tipically \c
272!! -I/usr/lib/gfortran/modules or \c -I/usr/lib64/gfortran/modules or
273!! \c -I/usr/include) and indicate the library name \c -lsim_base when
274!! linking, assuming that the library has been installed in a default
275!! location.
276
277!> Definition of constants to be used for declaring variables of a
278!! desired type. This module defines constants that can be portably
279!! used when declaring variables (through the \c KIND attribute) and
280!! when defining constants (through the underscore character \c _ ) in
281!! order to be sure that the desired type is used.
282!!
283!! There is a subtle difference between platform-default single and
284!! double precision real, obtained by declaring a variable of type \c
285!! REAL or \c DOUBLE \c PRECISION respectively, and single and double
286!! precision IEEE (4 and 8 bytes respectively) which are the standard
287!! IEEE data types and which are declared through \c REAL(kind=fp_s)
288!! and \c REAL(kind=fp_d) respectively: these two pairs of types
289!! usually coincide, but it may be not the case on some platforms, so
290!! you should choose one or the other approach depending on situation.
291!!
292!! Example of typical use:
293!! \code
294!! USE kinds
295!! ...
296!! INTEGER(kind=int_b) :: ab, bb
297!! REAL(kind=fp_d) :: dd
298!!
299!! ab = 13_int_b
300!! dd = REAL(ab, kind=fp_d)
301!! ...
302!! \endcode
303!! \ingroup base
304MODULE kinds
305IMPLICIT NONE
306
307INTEGER, PARAMETER :: int_b = selected_int_kind(1) !< 1-byte integer (byte)
308INTEGER, PARAMETER :: int_s = selected_int_kind(4) !< 2-byte integer (short)
309INTEGER, PARAMETER :: int_l = selected_int_kind(8) !< 4-byte integer (long)
310INTEGER, PARAMETER, PRIVATE :: &
311 int_ll_t = selected_int_kind(16)
312!> 8-byte integer (long long) if supported, otherwise 4-byte integer
313INTEGER, PARAMETER :: int_ll = &
314 ( ( ( 1 + sign( 1, int_ll_t ) ) / 2 ) * int_ll_t ) + &
315 ( ( ( 1 - sign( 1, int_ll_t ) ) / 2 ) * int_l )
316
317INTEGER, PARAMETER :: fp_s = selected_real_kind(6) !< single precision floating point (4 byte IEEE)
318INTEGER, PARAMETER :: fp_d = selected_real_kind(15) !< double precision floating point (8 byte IEEE)
319INTEGER, PARAMETER, PRIVATE :: fp_q_t = selected_real_kind(20)
320!> quad precision floating point (16 byte IEEE) if supported, otherwise double precision floating point
321INTEGER, PARAMETER :: fp_q = &
322 ( ( ( 1 + sign( 1, fp_q_t ) ) / 2 ) * fp_q_t ) + &
323 ( ( ( 1 - sign( 1, fp_q_t ) ) / 2 ) * fp_d )
324
325INTEGER, PARAMETER :: ptr_c = sizeof_ptr_c !< kind for an integer having the same size of a C pointer
326
327END MODULE kinds
Definition of constants to be used for declaring variables of a desired type.
Definition kinds.F90:245

Generated with Doxygen.