T_U32 Fwl_FileLongSeek(T_hFILE hFile, T_U32 offset, T_U16 origin)
{
T_U32 ret;
switch (origin)
{
case FS_SEEK_SET:
if(0x7FFFFFFF >= offset)
{
return File_SetFilePtr(hFile , (T_S32)offset , FS_SEEK_SET);
}
else
{
ret = File_SetFilePtr(hFile , (T_S32)0x7FFFFFFF , FS_SEEK_SET);
ret += File_SetFilePtr(hFile , (T_S32)(offset - 0x7FFFFFFF), FS_SEEK_CUR);
return ret;
}
break;
case FS_SEEK_CUR:
return File_SetFilePtr(hFile , (T_S32)offset, FS_SEEK_CUR);
break;
case FS_SEEK_END:
return File_SetFilePtr(hFile , (T_S32)offset , FS_SEEK_END);
break;
default:
return (T_U32)(-1);
break;
}
}
//偏移
T_U32 Fwl_FileSeek(T_hFILE hFile, T_S32 offset, T_U16 origin)
{
//判断句柄是否有效
if (hFile == FS_INVALID_HANDLE )
{
return FS_INVALID_SEEK;
}
return File_SetFilePtr((T_hFILE)hFile, offset, origin);
}
T_U32 Fwl_FileSeek(T_hFILE hFile, T_S32 offset, T_U16 origin)
{
return File_SetFilePtr(hFile, offset, origin);
}