X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fio%2Funix%2Fseekable.cpp;fp=source%2Fio%2Funix%2Fseekable.cpp;h=2c17114df3d617a1037e3ee6167cff051249fc88;hp=0000000000000000000000000000000000000000;hb=609c9a508cfdc7b42c46c4f21d17639204165a00;hpb=b4806214e905752617691f851717033fd3f266c2

diff --git a/source/io/unix/seekable.cpp b/source/io/unix/seekable.cpp
new file mode 100644
index 0000000..2c17114
--- /dev/null
+++ b/source/io/unix/seekable.cpp
@@ -0,0 +1,47 @@
+#define _LARGEFILE64_SOURCE
+#include <cerrno>
+#include <unistd.h>
+#include <msp/core/systemerror.h>
+#include "handle.h"
+#include "handle_private.h"
+#include "seekable.h"
+
+using namespace std;
+
+namespace {
+
+using namespace Msp::IO;
+
+int sys_seek_type(SeekType st)
+{
+	if(st==S_BEG)
+		return SEEK_SET;
+	else if(st==S_CUR)
+		return SEEK_CUR;
+	else if(st==S_END)
+		return SEEK_END;
+
+	throw invalid_argument("sys_seek_type");
+}
+
+}
+
+namespace Msp {
+namespace IO {
+
+SeekOffset sys_seek(Handle &handle, SeekOffset offset, SeekType type)
+{
+	off64_t ret = lseek64(*handle, offset, sys_seek_type(type));
+	if(ret==(off64_t)-1)
+	{
+		if(errno==EINVAL)
+			throw bad_seek(offset, type);
+		else
+			throw system_error("lseek64");
+	}
+
+	return ret;
+}
+
+} // namespace IO
+} // namespace Msp