input: moved plugins to ./src/input/

Create a sub directory for input plugins.

src/input/file_input_plugin.c

@@ -0,0 +1,129 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
+ * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "input/file_input_plugin.h"
+#include "input_plugin.h"
+
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <glib.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "input_file"
+
+static bool
+input_file_open(struct input_stream *is, const char *filename)
+{
+	int fd, ret;
+	struct stat st;
+
+	if (filename[0] != '/')
+		return false;
+
+	fd = open(filename, O_RDONLY);
+	if (fd < 0) {
+		is->error = errno;
+		return false;
+	}
+
+	is->seekable = true;
+
+	ret = fstat(fd, &st);
+	if (ret < 0) {
+		is->error = errno;
+		close(fd);
+		return false;
+	}
+
+	if (!S_ISREG(st.st_mode)) {
+		g_debug("Not a regular file: %s\n", filename);
+		is->error = EINVAL;
+		close(fd);
+		return false;
+	}
+
+	is->size = st.st_size;
+
+#ifdef POSIX_FADV_SEQUENTIAL
+	posix_fadvise(fd, (off_t)0, is->size, POSIX_FADV_SEQUENTIAL);
+#endif
+
+	is->plugin = &input_plugin_file;
+	is->data = GINT_TO_POINTER(fd);
+	is->ready = true;
+
+	return true;
+}
+
+static bool
+input_file_seek(struct input_stream *is, off_t offset, int whence)
+{
+	int fd = GPOINTER_TO_INT(is->data);
+
+	offset = lseek(fd, offset, whence);
+	if (offset < 0) {
+		is->error = errno;
+		return false;
+	}
+
+	is->offset = offset;
+	return true;
+}
+
+static size_t
+input_file_read(struct input_stream *is, void *ptr, size_t size)
+{
+	int fd = GPOINTER_TO_INT(is->data);
+	ssize_t nbytes;
+
+	nbytes = read(fd, ptr, size);
+	if (nbytes < 0) {
+		is->error = errno;
+		g_debug("input_file_read: error reading: %s\n",
+			strerror(is->error));
+		return 0;
+	}
+
+	is->offset += nbytes;
+	return (size_t)nbytes;
+}
+
+static void
+input_file_close(struct input_stream *is)
+{
+	int fd = GPOINTER_TO_INT(is->data);
+
+	close(fd);
+}
+
+static bool
+input_file_eof(struct input_stream *is)
+{
+	return is->offset >= is->size;
+}
+
+const struct input_plugin input_plugin_file = {
+	.open = input_file_open,
+	.close = input_file_close,
+	.read = input_file_read,
+	.eof = input_file_eof,
+	.seek = input_file_seek,
+};