Input*: move to input/

src/input/plugins/FileInputPlugin.cxx

@@ -0,0 +1,157 @@
+/*
+ * 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/Traits.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");
+
+struct FileInputStream {
+	InputStream 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 InputStream *
+input_file_open(const char *filename,
+		Mutex &mutex, Cond &cond,
+		Error &error)
+{
+	int fd, ret;
+	struct stat st;
+
+	if (!PathTraitsFS::IsAbsolute(filename))
+		return nullptr;
+
+	fd = open_cloexec(filename, O_RDONLY|O_BINARY, 0);
+	if (fd < 0) {
+		if (errno != ENOENT && errno != ENOTDIR)
+			error.FormatErrno("Failed to open \"%s\"",
+					  filename);
+		return nullptr;
+	}
+
+	ret = fstat(fd, &st);
+	if (ret < 0) {
+		error.FormatErrno("Failed to stat \"%s\"", filename);
+		close(fd);
+		return nullptr;
+	}
+
+	if (!S_ISREG(st.st_mode)) {
+		error.Format(file_domain, "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(InputStream *is, InputPlugin::offset_type offset,
+		int whence,
+		Error &error)
+{
+	FileInputStream *fis = (FileInputStream *)is;
+
+	offset = (InputPlugin::offset_type)lseek(fis->fd, (off_t)offset, whence);
+	if (offset < 0) {
+		error.SetErrno("Failed to seek");
+		return false;
+	}
+
+	is->offset = offset;
+	return true;
+}
+
+static size_t
+input_file_read(InputStream *is, void *ptr, size_t size,
+		Error &error)
+{
+	FileInputStream *fis = (FileInputStream *)is;
+	ssize_t nbytes;
+
+	nbytes = read(fis->fd, ptr, size);
+	if (nbytes < 0) {
+		error.SetErrno("Failed to read");
+		return 0;
+	}
+
+	is->offset += nbytes;
+	return (size_t)nbytes;
+}
+
+static void
+input_file_close(InputStream *is)
+{
+	FileInputStream *fis = (FileInputStream *)is;
+
+	delete fis;
+}
+
+static bool
+input_file_eof(InputStream *is)
+{
+	return is->offset >= is->size;
+}
+
+const InputPlugin 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,
+};