1 files changed, 164 insertions, 0 deletions
diff --git a/src/input/FileInputPlugin.cxx b/src/input/FileInputPlugin.cxx
new file mode 100644
index 00000000..2eecf32b
--- /dev/null
+++ b/src/input/FileInputPlugin.cxx
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2003-2013 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 "InputInternal.hxx"
+#include "InputStream.hxx"
+#include "InputPlugin.hxx"
+#include "fd_util.h"
+#include "open.h"
+#include "io_error.h"
+
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <glib.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "input_file"
+
+struct FileInputStream {
+	struct input_stream base;
+
+	int fd;
+
+	FileInputStream(const char *path, int _fd, off_t size,
+			Mutex &mutex, Cond &cond)
+		:base(input_plugin_file, path, mutex, cond),
+		 fd(_fd) {
+		base.size = size;
+		base.seekable = true;
+		base.ready = true;
+	}
+
+	~FileInputStream() {
+		close(fd);
+	}
+};
+
+static struct input_stream *
+input_file_open(const char *filename,
+		Mutex &mutex, Cond &cond,
+		GError **error_r)
+{
+	int fd, ret;
+	struct stat st;
+
+	if (!g_path_is_absolute(filename))
+		return nullptr;
+
+	fd = open_cloexec(filename, O_RDONLY|O_BINARY, 0);
+	if (fd < 0) {
+		if (errno != ENOENT && errno != ENOTDIR)
+			g_set_error(error_r, errno_quark(), errno,
+				    "Failed to open \"%s\": %s",
+				    filename, g_strerror(errno));
+		return nullptr;
+	}
+
+	ret = fstat(fd, &st);
+	if (ret < 0) {
+		g_set_error(error_r, errno_quark(), errno,
+			    "Failed to stat \"%s\": %s",
+			    filename, g_strerror(errno));
+		close(fd);
+		return nullptr;
+	}
+
+	if (!S_ISREG(st.st_mode)) {
+		g_set_error(error_r, errno_quark(), 0,
+			    "Not a regular file: %s", filename);
+		close(fd);
+		return nullptr;
+	}
+
+#ifdef POSIX_FADV_SEQUENTIAL
+	posix_fadvise(fd, (off_t)0, st.st_size, POSIX_FADV_SEQUENTIAL);
+#endif
+
+	FileInputStream *fis = new FileInputStream(filename, fd, st.st_size,
+						   mutex, cond);
+	return &fis->base;
+}
+
+static bool
+input_file_seek(struct input_stream *is, goffset offset, int whence,
+		GError **error_r)
+{
+	FileInputStream *fis = (FileInputStream *)is;
+
+	offset = (goffset)lseek(fis->fd, (off_t)offset, whence);
+	if (offset < 0) {
+		g_set_error(error_r, errno_quark(), errno,
+			    "Failed to seek: %s", g_strerror(errno));
+		return false;
+	}
+
+	is->offset = offset;
+	return true;
+}
+
+static size_t
+input_file_read(struct input_stream *is, void *ptr, size_t size,
+		GError **error_r)
+{
+	FileInputStream *fis = (FileInputStream *)is;
+	ssize_t nbytes;
+
+	nbytes = read(fis->fd, ptr, size);
+	if (nbytes < 0) {
+		g_set_error(error_r, errno_quark(), errno,
+			    "Failed to read: %s", g_strerror(errno));
+		return 0;
+	}
+
+	is->offset += nbytes;
+	return (size_t)nbytes;
+}
+
+static void
+input_file_close(struct input_stream *is)
+{
+	FileInputStream *fis = (FileInputStream *)is;
+
+	delete fis;
+}
+
+static bool
+input_file_eof(struct input_stream *is)
+{
+	return is->offset >= is->size;
+}
+
+const struct input_plugin input_plugin_file = {
+	"file",
+	nullptr,
+	nullptr,
+	input_file_open,
+	input_file_close,
+	nullptr,
+	nullptr,
+	nullptr,
+	nullptr,
+	input_file_read,
+	input_file_eof,
+	input_file_seek,
+};