[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 at online.no>
To: "ReactOS Development List" <ros-dev at 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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