From dddff2e7c658aa84f67186ade0a4845b5fb0b43f Mon Sep 17 00:00:00 2001
From: Daniel Elstner <daniel.kitta@gmail.com>
Date: Sun, 27 Sep 2015 01:14:11 +0200
Subject: [PATCH] android: Read firmware resources from assets

Set up a resource reader to load firmware resources as assets
bundled with the APK.
---
 CMakeLists.txt          |  5 ++-
 android/assetreader.cpp | 77 +++++++++++++++++++++++++++++++++++++++++
 android/assetreader.hpp | 41 ++++++++++++++++++++++
 main.cpp                |  6 +++-
 4 files changed, 127 insertions(+), 2 deletions(-)
 create mode 100644 android/assetreader.cpp
 create mode 100644 android/assetreader.hpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ce4139d9..be2cd14e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -324,7 +324,10 @@ if(WIN32)
 endif()
 
 if(ANDROID)
-	list(APPEND pulseview_SOURCES android/loghandler.cpp)
+	list(APPEND pulseview_SOURCES
+		android/assetreader.cpp
+		android/loghandler.cpp
+	)
 endif()
 
 if(Qt5Core_FOUND)
diff --git a/android/assetreader.cpp b/android/assetreader.cpp
new file mode 100644
index 00000000..bf76704a
--- /dev/null
+++ b/android/assetreader.cpp
@@ -0,0 +1,77 @@
+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2015 Daniel Elstner <daniel.kitta@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "assetreader.hpp"
+#include <libsigrok/libsigrok.h>
+#include <memory>
+#include <QtCore/QDebug>
+#include <QtCore/QFile>
+
+using namespace pv;
+
+AndroidAssetReader::~AndroidAssetReader()
+{}
+
+void AndroidAssetReader::open(struct sr_resource *res, std::string name)
+{
+	if (res->type == SR_RESOURCE_FIRMWARE) {
+		const auto path = QString::fromStdString("assets:/sigrok-firmware/" + name);
+		std::unique_ptr<QFile> file {new QFile{path}};
+
+		if (!file->open(QIODevice::ReadOnly))
+			throw sigrok::Error{SR_ERR};
+
+		const auto size = file->size();
+		if (size < 0)
+			throw sigrok::Error{SR_ERR};
+
+		res->size = size;
+		res->handle = file.release();
+	} else {
+		qWarning() << "AndroidAssetReader: Unknown resource type" << res->type;
+		throw sigrok::Error{SR_ERR};
+	}
+}
+
+void AndroidAssetReader::close(struct sr_resource *res)
+{
+	if (!res->handle) {
+		qCritical("AndroidAssetReader: Invalid handle");
+		throw sigrok::Error{SR_ERR_ARG};
+	}
+	const std::unique_ptr<QFile> file {static_cast<QFile*>(res->handle)};
+	res->handle = nullptr;
+
+	file->close();
+}
+
+size_t AndroidAssetReader::read(const struct sr_resource *res, void *buf, size_t count)
+{
+	if (!res->handle) {
+		qCritical("AndroidAssetReader: Invalid handle");
+		throw sigrok::Error{SR_ERR_ARG};
+	}
+	auto *const file = static_cast<QFile*>(res->handle);
+
+	const auto n_read = file->read(static_cast<char*>(buf), count);
+	if (n_read < 0)
+		throw sigrok::Error{SR_ERR};
+
+	return n_read;
+}
diff --git a/android/assetreader.hpp b/android/assetreader.hpp
new file mode 100644
index 00000000..74d49991
--- /dev/null
+++ b/android/assetreader.hpp
@@ -0,0 +1,41 @@
+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2015 Daniel Elstner <daniel.kitta@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PULSEVIEW_ANDROID_ASSETREADER_HPP
+#define PULSEVIEW_ANDROID_ASSETREADER_HPP
+
+#include <libsigrokcxx/libsigrokcxx.hpp>
+
+namespace pv {
+
+class AndroidAssetReader : public sigrok::ResourceReader
+{
+public:
+	AndroidAssetReader() {}
+	virtual ~AndroidAssetReader();
+
+private:
+	void open(struct sr_resource *res, std::string name) override;
+	void close(struct sr_resource *res) override;
+	size_t read(const struct sr_resource *res, void *buf, size_t count) override;
+};
+
+} // namespace pv
+
+#endif // !PULSEVIEW_ANDROID_ASSETREADER_HPP
diff --git a/main.cpp b/main.cpp
index 97a61280..daec62d2 100644
--- a/main.cpp
+++ b/main.cpp
@@ -38,6 +38,7 @@
 #include "pv/mainwindow.hpp"
 #ifdef ANDROID
 #include <libsigrokandroidutils/libsigrokandroidutils.h>
+#include "android/assetreader.hpp"
 #include "android/loghandler.hpp"
 #endif
 
@@ -77,6 +78,7 @@ int main(int argc, char *argv[])
 #ifdef ANDROID
 	srau_init_environment();
 	pv::AndroidLogHandler::install_callbacks();
+	pv::AndroidAssetReader asset_reader;
 #endif
 
 	// Parse arguments
@@ -137,7 +139,9 @@ int main(int argc, char *argv[])
 
 	// Initialise libsigrok
 	context = sigrok::Context::create();
-
+#ifdef ANDROID
+	context->set_resource_reader(&asset_reader);
+#endif
 	do {
 
 #ifdef ENABLE_DECODE
-- 
2.30.2