Re: [ros-dev] gcc/msvc int64 suffix/LARGE_INTEGER portability macros

[Magnus Olsen]

Hi
long long are working as 64 bits in MS visualstuido 7.1 
I do not have older version of vc, but I think it work same there


----- Original Message ----- 
From: "Gunnar Dalsnes" <hardon(a)online.no>
To: "ReactOS Development List" <ros-dev(a)reactos.com>
Sent: Tuesday, February 01, 2005 1:18 PM
Subject: [ros-dev] gcc/msvc int64 suffix/LARGE_INTEGER portability macros


>   Suggested gcc/msvc portability macros:
>  
>  #if defined(_MSC_VER)
>   
>     #define MK_INT64(a) (a)
>     #define MK_UINT64(a) (a)
>   
>     __inline LARGE_INTEGER MK_LARGE_INTEGER(__int64 i)
>     {
>        LARGE_INTEGER li;
>        li.QuadPart = i;
>        return li;
>     }
>   
>     #define LARGE_INTEGER_NULL MK_LARGE_INTEGER(0)
>  
>  #elif defined (__GNUC__)
>   
>     #define MK_INT64(a) (a##LL)
>     #define MK_UINT64(a) (a##ULL)
>   
>     #define MK_LARGE_INTEGER(a) ((LARGE_INTEGER)(LONGLONG)a)
>   
>     #define LARGE_INTEGER_NULL ((LARGE_INTEGER)(LONGLONG)0LL)
>   
>  #else
>     #error Unknown compiler for LARGE_INTEGER/int64 macros
>  #endif
>  
>  
>  example:
>  
>  LARGE_INTEGER test1(LARGE_INTEGER arg)
>  {
>   return MK_LARGE_INTEGER(arg.QuadPart+3);
>  }
>  
>  LARGE_INTEGER test2()
>  {
>   LARGE_INTEGER a = LARGE_INTEGER_NULL;
>   a.QuadPart += test1(LARGE_INTEGER_NULL).QuadPart;
>   a.QuadPart += MK_INT64(1152921504606846975);
>   return LARGE_INTEGER_NULL;
>  }
>  
>  What do you think?
>  
>  Gunnar
>  
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