libpbd: new threader Inflater and Downlaoder classes

libs/pbd/pbd/downloader.h

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2022 Paul Davis <paul@linuxaudiosystems.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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __libpbd_downloader_h__
+#define __libpbd_downloader_h__
+
+#include <atomic>
+#include <string>
+#include <thread>
+
+#include <curl/curl.h>
+
+#include "pbd/libpbd_visibility.h"
+
+namespace PBD {
+
+class LIBPBD_API Downloader {
+  public:
+	Downloader (std::string const & url, std::string const & destdir);
+	~Downloader ();
+
+	int start ();
+	void cleanup ();
+	void cancel ();
+	double progress() const;
+
+	uint64_t download_size() const { return _download_size; }
+	uint64_t downloaded () const { return _downloaded; }
+
+	/* public so it can be called from a static C function */
+	size_t write (void *contents, size_t size, size_t nmemb);
+
+	int status() const { return _status; }
+	std::string download_path() const;
+
+  private:
+	std::string url;
+	std::string destdir;
+	std::string file_path;
+	FILE* file;
+	CURL* curl;
+	bool _cancel;
+	std::atomic<uint64_t> _download_size; /* read-only from requestor thread */
+	std::atomic<uint64_t> _downloaded; /* read-only from requestor thread */
+	std::atomic<int> _status;
+	std::thread thr;
+
+	void download ();
+};
+
+} /* namespace */
+
+#endif

libs/pbd/pbd/inflater.h

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2022 Paul Davis <paul@linuxaudiosystems.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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __libpbd_inflater_h__
+#define __libpbd_inflater_h__
+
+#include <string>
+
+#include "pbd/file_archive.h"
+#include "pbd/libpbd_visibility.h"
+
+namespace PBD {
+	class Thread;
+}
+
+namespace PBD {
+
+class LIBPBD_API Inflater : public PBD::FileArchive
+{
+  public:
+	Inflater (std::string const & archive_path, std::string const & destdir);
+	~Inflater ();
+
+	int start ();
+	bool running() const { return thread != 0; }
+	int  status() const { return _status; }
+
+  private:
+	PBD::Thread* thread;
+	int _status;
+	std::string archive_path;
+	std::string destdir;
+
+	void threaded_inflate ();
+};
+
+} /* namespace */
+
+#endif