| paul@93 | 1 | /* |
| paul@93 | 2 | * An opener for a "host" file provided via the C library. |
| paul@93 | 3 | * |
| paul@236 | 4 | * Copyright (C) 2021, 2022 Paul Boddie <paul@boddie.org.uk> |
| paul@93 | 5 | * |
| paul@93 | 6 | * This program is free software; you can redistribute it and/or |
| paul@93 | 7 | * modify it under the terms of the GNU General Public License as |
| paul@93 | 8 | * published by the Free Software Foundation; either version 2 of |
| paul@93 | 9 | * the License, or (at your option) any later version. |
| paul@93 | 10 | * |
| paul@93 | 11 | * This program is distributed in the hope that it will be useful, |
| paul@93 | 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| paul@93 | 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| paul@93 | 14 | * GNU General Public License for more details. |
| paul@93 | 15 | * |
| paul@93 | 16 | * You should have received a copy of the GNU General Public License |
| paul@93 | 17 | * along with this program; if not, write to the Free Software |
| paul@93 | 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| paul@93 | 19 | * Boston, MA 02110-1301, USA |
| paul@93 | 20 | */ |
| paul@93 | 21 | |
| paul@12 | 22 | #pragma once |
| paul@12 | 23 | |
| paul@12 | 24 | #include <map> |
| paul@139 | 25 | #include <mutex> |
| paul@139 | 26 | #include <string> |
| paul@12 | 27 | |
| paul@94 | 28 | #include <fsserver/opener_resource.h> |
| paul@12 | 29 | |
| paul@12 | 30 | |
| paul@12 | 31 | |
| paul@139 | 32 | /* Collection data types. */ |
| paul@139 | 33 | |
| paul@139 | 34 | typedef std::map<std::string, fileid_t> HostFileIdentifiers; |
| paul@240 | 35 | typedef std::map<fileid_t, std::string> HostFilePaths; |
| paul@139 | 36 | |
| paul@139 | 37 | |
| paul@139 | 38 | |
| paul@12 | 39 | /* Support for providing access to files. */ |
| paul@12 | 40 | |
| paul@12 | 41 | class HostFileOpener : public OpenerResource |
| paul@12 | 42 | { |
| paul@12 | 43 | protected: |
| paul@139 | 44 | std::mutex _lock; |
| paul@139 | 45 | |
| paul@139 | 46 | /* File identifier register. */ |
| paul@139 | 47 | |
| paul@139 | 48 | HostFileIdentifiers _fileids; |
| paul@240 | 49 | HostFilePaths _paths; |
| paul@12 | 50 | |
| paul@143 | 51 | virtual fileid_t _get_fileid(const char *path, bool create); |
| paul@143 | 52 | |
| paul@240 | 53 | virtual const char *_get_path(fileid_t fileid); |
| paul@240 | 54 | |
| paul@156 | 55 | /* Convenience methods determining different object types. */ |
| paul@156 | 56 | |
| paul@240 | 57 | virtual bool accessing_directory(flags_t flags, fileid_t fileid); |
| paul@156 | 58 | |
| paul@240 | 59 | virtual bool accessing_file(flags_t flags, fileid_t fileid); |
| paul@156 | 60 | |
| paul@144 | 61 | public: |
| paul@224 | 62 | explicit HostFileOpener(ResourceRegistry *registry) |
| paul@209 | 63 | : OpenerResource(registry) |
| paul@144 | 64 | { |
| paul@144 | 65 | } |
| paul@144 | 66 | |
| paul@156 | 67 | virtual ~HostFileOpener(); |
| paul@156 | 68 | |
| paul@202 | 69 | /* File opening methods. */ |
| paul@12 | 70 | |
| paul@146 | 71 | virtual long get_fileid(const char *path, flags_t flags, fileid_t *fileid); |
| paul@12 | 72 | |
| paul@240 | 73 | virtual long make_accessor(flags_t flags, fileid_t fileid, |
| paul@202 | 74 | Accessor **accessor); |
| paul@202 | 75 | |
| paul@240 | 76 | virtual long make_directory_accessor(flags_t flags, fileid_t fileid, |
| paul@202 | 77 | DirectoryAccessor **accessor); |
| paul@232 | 78 | |
| paul@240 | 79 | virtual long remove_object(fileid_t fileid); |
| paul@232 | 80 | |
| paul@240 | 81 | virtual long rename_object(const char *source, const char *target); |
| paul@236 | 82 | |
| paul@240 | 83 | virtual long unlink_object(fileid_t parent_fileid, fileid_t fileid); |
| paul@12 | 84 | }; |
| paul@12 | 85 | |
| paul@12 | 86 | // vim: tabstop=4 expandtab shiftwidth=4 |
