Nagging Question (OpenInsight Specific) [Revelation On-Line Wiki]

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==== Nagging Question (OpenInsight Specific) ====
=== At 01 OCT 1999 10:27:37AM Don Miller - C3 Inc. wrote: ===
 
{{tag>"OpenInsight Specific"}}
 
<QUOTE>
In AREV (and GREV, for that matter), we've always had to use a code snippet like the following to solve an RTP57 run-time error problem on OSBREAD / OSBWRITE:

The problem manifests itself with the modulo of the byte offset for read/write operations (65536) is 21930.



FOOBAR=MOD(BYTE.POS,65536)

IF FOOBAR=21930 THEN

     BYTE.POS-=1                           ;* decrement by one

     OSBREAD BYTE FROM FVAR AT BYTE.POS LENGTH 1  ;* read a byte

     OUTPUT.REC=BYTE:OUTPUT.REC           ;* tack it to the head 

END

OSBWRITE OUTPUT.REC ON FVAR AT BYTE.POS

BYTE.POS+=LEN(OUTPUT.REC)

Is this still required in OI??

Don Miller



 
</QUOTE>
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=== At 02 OCT 1999 01:06AM Steve Smith wrote:  ===

<QUOTE>Don,



Wouldn't be surprised if the 21930 bug is still there. 

Can you write program to check?



Steve

</QUOTE>

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=== At 04 OCT 1999 10:54AM Don Miller - C3 Inc. wrote:  ===

<QUOTE>Steve .. will do and report back.



Don M.

</QUOTE>

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=== At 05 OCT 1999 04:12PM Don Miller - C3 Inc. wrote:  ===

<QUOTE>The bug is dead!!  Long live OI.  This used to be a genuine headache when writing import/export programs.  The offset I used was 87466 which MOD(65536) is 21930.  No longer is the following needed:

FOOBAR=MOD(BYTE.POS1,65536)

IF FOOBAR=21930 THEN

     BYTE.POS1-=1

     OSBREAD BYTE FROM FVAR AT BYTE.POS1 LENGTH 1

     OUTPUT.REC1=BYTE:OUTPUT.REC1

END

Don M.

</QUOTE>


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