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/* Part of SWI-Prolog
Author: Roy Ratcliffe
WWW: http://www.swi-prolog.org
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
:- module(iri_scheme_file, []).
:- register_iri_scheme(file, file_iri_hook, []).
:- public file_iri_hook/3.
%! file_iri_hook(+Action, +IRI, -Result) is semidet.
%
% Hooks IRI-style file system access using the "file" scheme. Useful
% when dragging files in macOS, for example, where Finder drops the
% file reference using a file://some-file atom. Maps file-scheme hooks
% directly to their corresponding built-in file-oriented predicates.
%
% Has potential self-recursion since the delegated predicates
% themselves re-invoke the registered IRI hooks if they receive an IRI
% scheme. The implementation therefore relies on file_name_to_url/2
% for translating file-IRI references to non-IRI file references, and
% thereby avoids re-invoking the hooks.
%
% @see register_iri_scheme/3
% @see open/4
file_iri_hook(open(Mode, Options), IRI, Stream) :-
file_name_to_url(File, IRI),
open(File, Mode, Stream, Options).
file_iri_hook(access(Mode), IRI, Bool) :-
file_name_to_url(File, IRI),
( ( Mode == directory
-> exists_directory(File)
; access_file(File, Mode)
)
-> Bool = true
; Bool = false
).
file_iri_hook(time, IRI, Time) :-
file_name_to_url(File, IRI),
time_file(File, Time).
file_iri_hook(size, IRI, Size) :-
file_name_to_url(File, IRI),
size_file(File, Size).
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