pm_sysPath::isExtant Interface Reference

Generate and return .true. if the input path (whether a file or a directory) exists and .false. otherwise.
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Detailed Description

Generate and return .true. if the input path (whether a file or a directory) exists and .false. otherwise.

This generic functional interface is a simple convenience wrapper around the generic interfaces isFile() and isDir() and returns the short-circuited result of isFile() .or. isDir().
As such, its behavior is fully dictated by these generic interfaces.

Parameters

[in]	path	: The input scalar, or array of arbitrary rank, of type character of default kind SK representing the path whose existence is to be checked.
[out]	iostat	: The optional output scalar integer of default kind IK. If present and no error occurs, it is set to 0 on output. If present and an error occurs, it is set to a positive non-zero value. If missing and an error occurs, then the program halts by calling error stop followed by the relevant error message. (optional.)
[in,out]	iomsg	: The input/output scalar character of default kind SK containing the error message, if any error occurs. A length type parameter value of LEN_IOMSG is generally sufficient for iomsg to contain the output error messages. (optional. It can be present only if the iostat output argument is also present.)

Returns

extant : The output scalar, or array of same rank, shape, and size as the input array-like argument, of type logical of default kind LK.
It is .true. if and only if the input path (whether a file or a directory) exists.
Otherwise, it is .false..

Possible calling interfaces ⛓

use pm_kind, only: LK
use pm_sysPath, only: isExtant
integer(IK) :: iostat
logical(LK) :: extant
 
extant = isExtant(path)
extant = isExtant(path, iostat, iomsg = iomsg)

Remarks

The procedures under discussion are impure.

The procedures under discussion are elemental.

See also

isOpen
isDir
isFile
isExtant
isPreconnected

Example usage ⛓

program example
 
    use iso_fortran_env, only: output_unit, input_unit, error_unit
    use pm_kind, only: SK, IK, LK
    use pm_sysPath, only: isExtant
    use pm_io, only: display_type
 
    implicit none
 
    integer(IK) :: unit
    type(display_type) :: disp
 
    disp = display_type(file = "main.out.F90")
 
    call disp%skip
    call disp%show("isExtant('temp.tmp')")
    call disp%show( isExtant('temp.tmp') )
    call disp%skip
 
    call disp%skip
    call disp%show("open(newunit = unit, file = 'temp.tmp')")
                    open(newunit = unit, file = 'temp.tmp')
    call disp%show("isExtant('temp.tmp')")
    call disp%show( isExtant('temp.tmp') )
    call disp%show("close(unit)")
                    close(unit)
    call disp%show("isExtant('temp.tmp')")
    call disp%show( isExtant('temp.tmp') )
    call disp%skip
 
    call disp%skip
    call disp%show("isExtant('main.F90')")
    call disp%show( isExtant('main.F90') )
    call disp%skip
 
    call disp%skip
    call disp%show("isExtant('.') ! Current directory.")
    call disp%show( isExtant('.') )
    call disp%skip
 
    call disp%skip
    call disp%show("isExtant('./') ! Current directory.")
    call disp%show( isExtant('./') )
    call disp%skip
 
    call disp%skip
    call disp%show("isExtant('..') ! Parent directory.")
    call disp%show( isExtant('..') )
    call disp%skip
 
    call disp%skip
    call disp%show("isExtant('../') ! Parent directory.")
    call disp%show( isExtant('../') )
    call disp%skip
 
end program example

Example Unix compile command via Intel ifort compiler ⛓

#!/usr/bin/env sh
rm main.exe
ifort -fpp -standard-semantics -O3 -Wl,-rpath,../../../lib -I../../../inc main.F90 ../../../lib/libparamonte* -o main.exe
./main.exe

Example Windows Batch compile command via Intel ifort compiler ⛓

del main.exe
set PATH=..\..\..\lib;%PATH%
ifort /fpp /standard-semantics /O3 /I:..\..\..\include main.F90 ..\..\..\lib\libparamonte*.lib /exe:main.exe
main.exe

Example Unix / MinGW compile command via GNU gfortran compiler ⛓

#!/usr/bin/env sh
rm main.exe
gfortran -cpp -ffree-line-length-none -O3 -Wl,-rpath,../../../lib -I../../../inc main.F90 ../../../lib/libparamonte* -o main.exe
./main.exe

Example output ⛓

 
isExtant('temp.tmp')
F
 
 
open(newunit = unit, file = 'temp.tmp')
isExtant('temp.tmp')
T
close(unit)
isExtant('temp.tmp')
T
 
 
isExtant('main.F90')
T
 
 
isExtant('.') ! Current directory.
T
 
 
isExtant('./') ! Current directory.
T
 
 
isExtant('..') ! Parent directory.
T
 
 
isExtant('../') ! Parent directory.
T
 
 

Test:

test_pm_sysPath

Final Remarks ⛓

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For details on the naming abbreviations, see this page.
For details on the naming conventions, see this page.
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Help us justify its continued development and maintenance by acknowledging its benefit to society, distributing it, and contributing to it.

Copyright

Computational Data Science Lab

Author:

Amir Shahmoradi, Tuesday March 7, 2017, 3:50 AM, Institute for Computational Engineering and Sciences (ICES), The University of Texas Austin

Definition at line 4859 of file pm_sysPath.F90.

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The documentation for this interface was generated from the following file:

• src/fortran/main/pm_sysPath.F90