Re: [Boost-users] [serialization] compare two archives?

Subject: Re: [Boost-users] [serialization] compare two archives?
From: Brian Budge (brian.budge_at_[hidden])
Date: 2010-11-19 15:25:51

If you know the length, you could run a crc if you don't need 100%
guarantee they're the same, but only reasonable assurance.

  Brian

On Fri, Nov 19, 2010 at 12:19 PM, James C. Sutherland
<James.Sutherland_at_[hidden]> wrote:
>
> On Fri, Nov 19, 2010 at 12:55 PM, Jeff Flinn <TriumphSprint2000_at_[hidden]>
> wrote:
>>
>> James C. Sutherland wrote:
>>>
>>> It appears that the operator == is not supported on an archive.
>>>
>>> Is there a way to compare two archives for equality without instantiating
>>> all objects in the archive and looking at equality of the objects?
>>
>> Wouldn't you just compare the underlying storage of the archived data?
>> Such as the resulting file, or string from a ostringstream.
>>
>> Not sure what your are trying to accomplish.
>>
>
> Really I just want to compare two archives that I have read in for equality.
>
>       ifstream file1( tname1.c_str(), std::ios_base::in );
>       InputArchive ar1(file1);
>       ar1 >> BOOST_SERIALIZATION_NVP(tbl1);
>
>       ifstream file2( tname2.c_str(), std::ios_base::in );
>       InputArchive ar2(file2);
>       ar2 >> BOOST_SERIALIZATION_NVP(tbl2);
>
> So at this point I could compare file1 and file2 or ar1 ar2 or tbl1 and
> tbl2.
> Comparing equality on tbl1 and tbl2 is a bit tedious, so if I could directly
> compare either the files or the archives that would help.
>
> Hopefully that clarifies my question.
>
> James
>
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