From: Ara.T.Howard@...
Date: 2005-04-26T10:04:31+09:00
Subject: Re: long conversion ...

On Tue, 26 Apr 2005, Zach Dennis wrote:

> The data is being written from another application to a binary file. I have
> isolated and confirmed that 4 bytes correspond to a certain number input (a
> maximum folder size is what the number means). I am reading the file and
> parsing it's information. I have every field working except for this max
> folder size.
>
> It appears that my numbers for 50 were wrong in my original post, although
> with the logic you applied Ara my wishful thinking was still way off base.
>
> Here is a sample of the first 50 rows of data. Each row signifies the # of
> Megabytes defined for max storage. Each column signifies a byte in the
> position they are in the file. The first column and the first row are labels
> in this email.
>
> This is another numbers/patterns/algorithms things similar to what I posted
> a few weeks ago, but this time it appears slighly more difficult.
>
> If anyone has the time, the patience and the know-how to make sense of this,
> any help would greatly be appreciated. If not then I will keep thinking
> about ways to attack this problem. Thanks in advance,

network ordered longs?

   harp:~ > cat a.rb
   rows = [
     %w[ 0       0       0       0   ] ,
     %w[ 0       15      66      64  ] ,
     %w[ 0       30      132     128 ] ,
     %w[ 0       45      198     192 ] ,
     %w[ 0       61      9       0   ] ,
     %w[ 0       76      75      64  ] ,
     %w[ 0       91      141     128 ] ,
     %w[ 0       106     207     192 ] ,
     %w[ 0       122     18      0   ] ,
     %w[ 0       137     84      64  ] ,
     %w[ 0       152     150     128 ] ,
     %w[ 0       167     216     192 ] ,
     %w[ 0       183     27      0   ] ,
     %w[ 0       198     93      64  ] ,
     %w[ 0       213     159     128 ] ,
     %w[ 0       228     225     192 ] ,
     %w[ 0       244     36      0   ] ,
     %w[ 1       3       102     64  ] ,
     %w[ 1       18      168     128 ] ,
     %w[ 1       33      234     192 ] ,
     %w[ 1       49      45      0   ] ,
     %w[ 1       64      111     64  ] ,
     %w[ 1       79      177     128 ] ,
     %w[ 1       94      243     192 ] ,
     %w[ 1       109     54      0   ] ,
     %w[ 1       125     120     64  ] ,
     %w[ 1       140     186     128 ] ,
     %w[ 1       155     252     192 ] ,
     %w[ 1       171     63      0   ] ,
     %w[ 1       186     129     64  ] ,
     %w[ 1       202     195     128 ] ,
     %w[ 1       217     5       192 ] ,
     %w[ 1       232     72      0   ] ,
     %w[ 1       247     138     64  ] ,
     %w[ 2       6       204     128 ] ,
     %w[ 2       22      14      192 ] ,
     %w[ 2       37      81      0   ] ,
     %w[ 2       52      147     64  ] ,
     %w[ 2       67      213     128 ] ,
     %w[ 2       83      23      192 ] ,
     %w[ 2       98      90      0   ] ,
     %w[ 2       113     156     64  ] ,
     %w[ 2       128     222     128 ] ,
     %w[ 2       144     32      192 ] ,
     %w[ 2       159     99      0   ] ,
     %w[ 2       174     165     64  ] ,
     %w[ 2       189     231     128 ] ,
     %w[ 2       205     41      192 ] ,
     %w[ 2       220     108     0   ] ,
     %w[ 2       235     174     64  ] ,
     %w[ 2       250     240     128 ] ,
   ]


   rows.each do |row|
     bytes = row.map{|value| value.to_i}
     word = bytes.inject(''){|s,byte| s << byte.chr}
     p word.unpack('N')
   end

   harp:~ > ruby a.rb
   [0]
   [1000000]
   [2000000]
   [3000000]
   [4000000]
   [5000000]
   [6000000]
   [7000000]
   [8000000]
   [9000000]
   [10000000]
   [11000000]
   [12000000]
   [13000000]
   [14000000]
   [15000000]
   [16000000]
   [17000000]
   [18000000]
   [19000000]
   [20000000]
   [21000000]
   [22000000]
   [23000000]
   [23934464]
   [25000000]
   [26000000]
   [27000000]
   [28000000]
   [29000000]
   [30065536]
   [31000000]
   [32000000]
   [33000000]
   [34000000]
   [35000000]
   [36000000]
   [37000000]
   [38000000]
   [39000000]
   [40000000]
   [41000000]
   [42000000]
   [43000000]
   [44000000]
   [45000000]
   [46000000]
   [47000000]
   [48000000]
   [49000000]
   [50000000]


look reasonable no?

cheers.

-a
-- 
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| phone   :: 303.497.6469
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