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-rw-r--r--src/fs/io/FileOutputStream.cxx135
1 files changed, 135 insertions, 0 deletions
diff --git a/src/fs/io/FileOutputStream.cxx b/src/fs/io/FileOutputStream.cxx
new file mode 100644
index 000000000..dc4456d1f
--- /dev/null
+++ b/src/fs/io/FileOutputStream.cxx
@@ -0,0 +1,135 @@
+/*
+ * 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"
+#include "FileOutputStream.hxx"
+#include "fs/FileSystem.hxx"
+#include "system/fd_util.h"
+#include "util/Error.hxx"
+
+#ifdef WIN32
+
+FileOutputStream::FileOutputStream(Path _path, Error &error)
+ :path(_path),
+ handle(CreateFile(path.c_str(), GENERIC_WRITE, 0, nullptr,
+ TRUNCATE_EXISTING,
+ FILE_ATTRIBUTE_NORMAL|FILE_FLAG_WRITE_THROUGH,
+ nullptr))
+{
+ if (handle == INVALID_HANDLE_VALUE)
+ error.FormatLastError("Failed to create %s", path.c_str());
+}
+
+bool
+FileOutputStream::Write(const void *data, size_t size, Error &error)
+{
+ assert(IsDefined());
+
+ DWORD nbytes;
+ if (!WriteFile(handle, data, size, &nbytes, nullptr)) {
+ error.FormatLastError("Failed to write to %s", path.c_str());
+ return false;
+ }
+
+ if (size_t(nbytes) != size) {
+ error.FormatLastError(ERROR_DISK_FULL,
+ "Failed to write to %s", path.c_str());
+ return false;
+ }
+
+ return true;
+}
+
+bool
+FileOutputStream::Commit(gcc_unused Error &error)
+{
+ assert(IsDefined());
+
+ CloseHandle(handle);
+ return true;
+}
+
+void
+FileOutputStream::Cancel()
+{
+ assert(IsDefined());
+
+ CloseHandle(handle);
+ RemoveFile(path);
+}
+
+#else
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+
+FileOutputStream::FileOutputStream(Path _path, Error &error)
+ :path(_path),
+ fd(open_cloexec(path.c_str(),
+ O_WRONLY|O_CREAT|O_TRUNC,
+ 0666))
+{
+ if (fd < 0)
+ error.FormatErrno("Failed to create %s", path.c_str());
+}
+
+bool
+FileOutputStream::Write(const void *data, size_t size, Error &error)
+{
+ assert(IsDefined());
+
+ ssize_t nbytes = write(fd, data, size);
+ if (nbytes < 0) {
+ error.FormatErrno("Failed to write to %s", path.c_str());
+ return false;
+ } else if ((size_t)nbytes < size) {
+ error.FormatErrno(ENOSPC,
+ "Failed to write to %s", path.c_str());
+ return false;
+ }
+
+ return true;
+}
+
+bool
+FileOutputStream::Commit(Error &error)
+{
+ assert(IsDefined());
+
+ bool success = close(fd) == 0;
+ fd = -1;
+ if (!success)
+ error.FormatErrno("Failed to commit %s", path.c_str());
+
+ return success;
+}
+
+void
+FileOutputStream::Cancel()
+{
+ assert(IsDefined());
+
+ close(fd);
+ fd = -1;
+
+ RemoveFile(path);
+}
+
+#endif