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1 /*
2  * This file is part of the PulseView project.
3  *
4  * Copyright (C) 2015 Daniel Elstner <daniel.kitta@gmail.com>
5  *
6  * This program is free software: you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation, either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
18  */
19
20 #include "assetreader.hpp"
21 #include <libsigrok/libsigrok.h>
22 #include <memory>
23 #include <QtCore/QDebug>
24 #include <QtCore/QFile>
25 #include <QtCore/QStandardPaths>
26
27 using namespace pv;
28
29 AndroidAssetReader::~AndroidAssetReader()
30 {}
31
32 void AndroidAssetReader::open(struct sr_resource *res, std::string name)
33 {
34         if (res->type == SR_RESOURCE_FIRMWARE) {
35                 auto path = QStandardPaths::locate(QStandardPaths::GenericDataLocation,
36                                                    QString::fromStdString("sigrok-firmware/" + name));
37                 if (path.isEmpty())
38                         path = QString::fromStdString("assets:/sigrok-firmware/" + name);
39
40                 std::unique_ptr<QFile> file {new QFile{path}};
41
42                 if (!file->open(QIODevice::ReadOnly))
43                         throw sigrok::Error{SR_ERR};
44
45                 const auto size = file->size();
46                 if (size < 0)
47                         throw sigrok::Error{SR_ERR};
48
49                 res->size = size;
50                 res->handle = file.release();
51         } else {
52                 qWarning() << "AndroidAssetReader: Unknown resource type" << res->type;
53                 throw sigrok::Error{SR_ERR};
54         }
55 }
56
57 void AndroidAssetReader::close(struct sr_resource *res)
58 {
59         if (!res->handle) {
60                 qCritical("AndroidAssetReader: Invalid handle");
61                 throw sigrok::Error{SR_ERR_ARG};
62         }
63         const std::unique_ptr<QFile> file {static_cast<QFile*>(res->handle)};
64         res->handle = nullptr;
65
66         file->close();
67 }
68
69 size_t AndroidAssetReader::read(const struct sr_resource *res, void *buf, size_t count)
70 {
71         if (!res->handle) {
72                 qCritical("AndroidAssetReader: Invalid handle");
73                 throw sigrok::Error{SR_ERR_ARG};
74         }
75         auto *const file = static_cast<QFile*>(res->handle);
76
77         const auto n_read = file->read(static_cast<char*>(buf), count);
78         if (n_read < 0)
79                 throw sigrok::Error{SR_ERR};
80
81         return n_read;
82 }