7 Intrinsic Modules

7.1 ISO_FORTRAN_ENV

Standard:

Fortran 2003

The ISO_FORTRAN_ENV module provides the following scalar default-integer named constants:

CHARACTER_STORAGE_SIZE:

Size in bits of the character storage unit.

ERROR_UNIT:

Indentifies the preconnected unit used for error reporting.

FILE_STORAGE_SIZE:

Size in bits of the file-storage unit.

INPUT_UNIT:

Indentifies the preconnected unit indentified by the asterisk (*) in READ statement.

IOSTAT_END:

The value assigned to the variable passed to the IOSTAT= specifier of an input/output statement if an end-of-file condition occurred.

IOSTAT_EOR:

The value assigned to the variable passed to the IOSTAT= specifier of an input/output statement if an end-of-record condition occurred.

NUMERIC_STORAGE_SIZE:

The size in bits of the numeric storage unit.

OUTPUT_UNIT:

Indentifies the preconnected unit indentified by the asterisk (*) in WRITE statement.

7.2 ISO_C_BINDING

Standard:

Fortran 2003

The following intrinsic procedures are provided by the module; their definition can be found in the section Intrinsic Procedures of this manual.

C_ASSOCIATED

C_F_POINTER

C_F_PROCPOINTER

C_FUNLOC

C_LOC

The ISO_C_BINDING module provides the following named constants of the type integer, which can be used as KIND type parameter. Note that GNU Fortran currently does not support the C_INT_FAST... KIND type parameters (marked by an asterix (*) in the list below). The C_INT_FAST... parameters have therefore the value -2 and cannot be used as KIND type parameter of the INTEGER type.

Fortran Type	Named constant	C type
INTEGER	C_INT	int
INTEGER	C_SHORT	short int
INTEGER	C_LONG	long int
INTEGER	C_LONG_LONG	long long int
INTEGER	C_SIGNED_CHAR	signed char/unsigned char
INTEGER	C_SIZE_T	size_t
INTEGER	C_INT8_T	int8_t
INTEGER	C_INT16_T	int16_t
INTEGER	C_INT32_T	int32_t
INTEGER	C_INT64_T	int64_t
INTEGER	C_INT_LEAST8_T	int_least8_t
INTEGER	C_INT_LEAST16_T	int_least16_t
INTEGER	C_INT_LEAST32_T	int_least32_t
INTEGER	C_INT_LEAST64_T	int_least64_t
INTEGER	C_INT_FAST8_T*	int_fast8_t
INTEGER	C_INT_FAST16_T*	int_fast16_t
INTEGER	C_INT_FAST32_T*	int_fast32_t
INTEGER	C_INT_FAST64_T*	int_fast64_t
INTEGER	C_INTMAX_T	intmax_t
INTEGER	C_INTPTR_T	intptr_t
REAL	C_FLOAT	float
REAL	C_DOUBLE	double
REAL	C_LONG_DOUBLE	long double
COMPLEX	C_FLOAT_COMPLEX	float _Complex
COMPLEX	C_DOUBLE_COMPLEX	double _Complex
COMPLEX	C_LONG_DOUBLE_COMPLEX	long double _Complex
LOGICAL	C_BOOL	_Bool
CHARACTER	C_CHAR	char

Additionally, the following (CHARACTER(KIND=C_CHAR) are defined.

Name	C definition	Value
C_NULL_CHAR	null character	'\0'
C_ALERT	alert	'\a'
C_BACKSPACE	backspace	'\b'
C_FORM_FEED	form feed	'\f'
C_NEW_LINE	new line	'\n'
C_CARRIAGE_RETURN	carriage return	'\r'
C_HORIZONTAL_TAB	horizontal tab	'\t'
C_VERTICAL_TAB	vertical tab	'\v'

7.3 OpenMP Modules OMP_LIB and OMP_LIB_KINDS

Standard:

OpenMP Application Program Interface v2.5

The OpenMP Fortran runtime library routines are provided both in a form of two Fortran 90 modules, named OMP_LIB and OMP_LIB_KINDS, and in a form of a Fortran include file named omp_lib.h. The procedures provided by OMP_LIB can be found in the Introduction manual, the named constants defined in the OMP_LIB_KINDS module are listed below.

For details refer to the actual OpenMP Application Program Interface v2.5.

OMP_LIB_KINDS provides the following scalar default-integer named constants:

omp_integer_kind

omp_logical_kind

omp_lock_kind

omp_nest_lock_kind