#ifndef WIN32
#define _LARGEFILE64_SOURCE
+#include <cerrno>
+#include <unistd.h>
#else
#include <windows.h>
#endif
-#include <stdexcept>
#include <msp/core/systemerror.h>
+#include <msp/strings/format.h>
#include "handle.h"
#include "handle_private.h"
#include "seekable.h"
namespace Msp {
namespace IO {
+bad_seek::bad_seek(SeekOffset offset, SeekType type):
+ runtime_error(type==S_BEG ? lexical_cast<string>(offset) :
+ type==S_CUR ? format("CUR%+d", offset) :
+ type==S_END ? format("END%+d", offset) :
+ format("SeekType(%d)", type))
+{ }
+
+
SeekOffset sys_seek(Handle &handle, SeekOffset offset, SeekType type)
{
#ifdef WIN32
#else
off64_t ret = lseek64(*handle, offset, sys_seek_type(type));
if(ret==(off64_t)-1)
- throw system_error("lseek64");
+ {
+ if(errno==EINVAL)
+ throw bad_seek(offset, type);
+ else
+ throw system_error("lseek64");
+ }
return ret;
#endif