1 files changed, 138 insertions, 0 deletions
diff --git a/src/input/plugins/FileInputPlugin.cxx b/src/input/plugins/FileInputPlugin.cxx
new file mode 100644
index 000000000..867b5722d
--- /dev/null
+++ b/src/input/plugins/FileInputPlugin.cxx
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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.
+ */
+
+#include "config.h" /* must be first for large file support */
+#include "FileInputPlugin.hxx"
+#include "../InputStream.hxx"
+#include "../InputPlugin.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "fs/FileSystem.hxx"
+#include "fs/Path.hxx"
+#include "system/fd_util.h"
+#include "open.h"
+
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+
+static constexpr Domain file_domain("file");
+
+class FileInputStream final : public InputStream {
+	const int fd;
+
+public:
+	FileInputStream(const char *path, int _fd, off_t _size,
+			Mutex &_mutex, Cond &_cond)
+		:InputStream(path, _mutex, _cond),
+		 fd(_fd) {
+		size = _size;
+		seekable = true;
+		SetReady();
+	}
+
+	~FileInputStream() {
+		close(fd);
+	}
+
+	/* virtual methods from InputStream */
+
+	bool IsEOF() override {
+		return GetOffset() >= GetSize();
+	}
+
+	size_t Read(void *ptr, size_t size, Error &error) override;
+	bool Seek(offset_type offset, Error &error) override;
+};
+
+InputStream *
+OpenFileInputStream(Path path,
+		    Mutex &mutex, Cond &cond,
+		    Error &error)
+{
+	const int fd = OpenFile(path, O_RDONLY|O_BINARY, 0);
+	if (fd < 0) {
+		error.FormatErrno("Failed to open \"%s\"",
+				  path.c_str());
+		return nullptr;
+	}
+
+	struct stat st;
+	if (fstat(fd, &st) < 0) {
+		error.FormatErrno("Failed to stat \"%s\"", path.c_str());
+		close(fd);
+		return nullptr;
+	}
+
+	if (!S_ISREG(st.st_mode)) {
+		error.Format(file_domain, "Not a regular file: %s",
+			     path.c_str());
+		close(fd);
+		return nullptr;
+	}
+
+#ifdef POSIX_FADV_SEQUENTIAL
+	posix_fadvise(fd, (off_t)0, st.st_size, POSIX_FADV_SEQUENTIAL);
+#endif
+
+	return new FileInputStream(path.c_str(), fd, st.st_size, mutex, cond);
+}
+
+static InputStream *
+input_file_open(gcc_unused const char *filename,
+		gcc_unused Mutex &mutex, gcc_unused Cond &cond,
+		gcc_unused Error &error)
+{
+	/* dummy method; use OpenFileInputStream() instead */
+
+	return nullptr;
+}
+
+bool
+FileInputStream::Seek(offset_type new_offset, Error &error)
+{
+	auto result = lseek(fd, (off_t)new_offset, SEEK_SET);
+	if (result < 0) {
+		error.SetErrno("Failed to seek");
+		return false;
+	}
+
+	offset = (offset_type)result;
+	return true;
+}
+
+size_t
+FileInputStream::Read(void *ptr, size_t read_size, Error &error)
+{
+	ssize_t nbytes = read(fd, ptr, read_size);
+	if (nbytes < 0) {
+		error.SetErrno("Failed to read");
+		return 0;
+	}
+
+	offset += nbytes;
+	return (size_t)nbytes;
+}
+
+const InputPlugin input_plugin_file = {
+	"file",
+	nullptr,
+	nullptr,
+	input_file_open,
+};