Wrap seek in a helper function and make it compatible with 64-bit offsets

[libs/core.git] / source / io / file.cpp

diff --git a/source/io/file.cpp b/source/io/file.cpp
index 1b207a25971f960ef99fa5f4481a0be23239e38d..0f5652ad9484cf460a2e266f666470c00b67dd02 100644 (file)
--- a/source/io/file.cpp
+++ b/source/io/file.cpp
@@ -156,43 +156,22 @@ void File::sync()
 #endif
 }
 
-unsigned File::seek(int off, SeekType st)
+SeekOffset File::seek(SeekOffset off, SeekType type)
 {
        check_access(M_NONE);
 
        signal_flush_required.emit();
-
-       int type = sys_seek_type(st);
-#ifdef WIN32
-       DWORD ret = SetFilePointer(*handle, off, 0, type);
-       if(ret==INVALID_SET_FILE_POINTER)
-               throw system_error("SetFilePointer");
-#else
-       off_t ret = lseek(*handle, off, type);
-       if(ret==(off_t)-1)
-               throw system_error("lseek");
-#endif
-
+       off = sys_seek(handle, off, type);
        eof_flag = false;
 
-       return ret;
+       return off;
 }
 
-unsigned File::tell() const
+SeekOffset File::tell() const
 {
        check_access(M_NONE);
 
-#ifdef WIN32
-       DWORD ret = SetFilePointer(*handle, 0, 0, FILE_CURRENT);
-       if(ret==INVALID_SET_FILE_POINTER)
-               throw system_error("SetFilePointer");
-#else
-       off_t ret = lseek(*handle, 0, SEEK_CUR);
-       if(ret==(off_t)-1)
-               throw system_error("lseek");
-#endif
-
-       return ret;
+       return sys_seek(const_cast<Handle &>(handle), 0, S_CUR);
 }
 
 void File::check_access(Mode m) const