OpenEuphoria

Re: how get "number" in disk text file read into integer variable?

• Posted by Dan B Moyer <DANMOYER at PRODIGY.NET> Jan 30, 2000
• 537 views

A belated thanks to M.Kollenaar for code to write & read integers from a
disk file; turns out I did need it after all, for a different part of my
structured variable than what I was originally asking about.

Dan Moyer


-----Original Message-----
From: M.Kollenaar <M.Kollenaar at SLO.NL>
To: EUPHORIA at LISTSERV.MUOHIO.EDU <EUPHORIA at LISTSERV.MUOHIO.EDU>
Date: Sunday, January 23, 2000 1:51 PM
Subject: Re: how get "number" in disk text file read into integer variable?


>Hi Dan,
>
>I use this code to write and read integers to and from a disk file. fn is a
file
>handle.
>
>global procedure PutDWord(integer fn, integer dw)
>--  Writes a double word (4 bytes) to an open file.
>    puts(fn,int_to_bytes(dw))
>end procedure
>
>global function GetDWord(integer fn)
>-- Reads an 32-bits integer from disk.
>-- Speeding up thanks to Lucius L. Hilley III.
>    sequence w
>
>    w = repeat(0,4)
>    for i = 1 to 4 do
> w[i] = getc(fn)
>    end for
>    return bytes_to_int(w)
>end function
>
>-- end code
>
>Dan B Moyer wrote:
>
>> Ok gang, here's my problem now <sigh!>:
>>
>> How do I get a "number" I have saved into a (text) disk file back as an
>> integer?
>>
>> I'm trying to save a structured variable to a disk file & then be able to
>> read it from the file & put it back  into the structured variable.  I'm
>> using the
>> "newex06d.exw" database example by Ad Rienks from the Tutorial as a
starting
>> point, & proceeding tiny steps at a time.
>>
>> My first step was to make a text file that would LOOK like the saved file
>> should look like, and then just READ that file into my structured
variable.
>> Since part of my structured variable is of variable length, I put that
>> length into a disk file (using a text editor), so it can be read out &
used
>> to count lines in the file to know what to put where in the structured
>> variable.
>>
>> So if my first variant length is "3", I put the number 3 into the disk
>> file on a line; but I can't seem to get that "3" back as an integer when
I
>> read it (I get 51, which is ASCII for 3).  I'm guessing this is
>> pathetically simple, but I can't get it.
>>
>> Dan Moyer