[sword-devel] Fastest way of counting verses

[Manfred Bergmann]

> However that's for your snippets, I could speed up some things here.

That should have read "thanks" instead of "that's".


No problem, Troy. I appreciate your fast replies for questions.
It works for me, so don't stress yourself.



Manfred


Am 12.03.2009 um 16:30 schrieb Troy A. Griffitts:

> Thanks Manfred,
>
> I have your previous posts on this one in my inbox still to debug.   
> I really appreciated the feedback even if I don't always reply right  
> away.  Please don't stop reminding me though.
>
> 	-Troy.
>
>
>
> Manfred Bergmann wrote:
>> Hi Troy.
>> The speed of the library is good but we're producing some overhead  
>> for display like adding markers to the text in order to synchronize  
>> between views and such.
>> The overall speed is still ok but if the user pulls more books like  
>> 1-5Mose then it can take 7 - 10 secs.
>> However that's for your snippets, I could speed up some things here.
>> Here is something interesting:
>> (a not existing key is used in the examples).
>> ---------------------------
>> sword::VerseKey    vk;
>> sword::ListKey lk = vk.ParseVerseList("Par.1.1", vk, true);
>> lk.Persist(true);
>> swModule->setKey(lk);
>> for ((*swModule) = sword::TOP; !swModule->Error(); (*swModule)++) {
>>    // do something
>>    ...
>> }
>> --------------------------
>> The above crashes at (*swModule) = sword::TOP.
>> ---------------------------
>> sword::VerseKey    vk;
>> sword::ListKey lk = vk.ParseVerseList("Par.1.1", vk, true);
>> //lk.Persist(true);
>> swModule->setKey(lk);
>> for ((*swModule) = sword::TOP; !swModule->Error(); (*swModule)++) {
>>    // do something
>>    ...
>> }
>> --------------------------
>> This doesn't crash but iteration starts at Gen 1.
>> Note, Persist() is commented.
>> --------------------------
>> sword::VerseKey    vk;
>> sword::ListKey lk = vk.ParseVerseList("Par.1.1", vk, true);
>> for (lk = sword::TOP; !lk.Error(); lk++) {
>>    swModule->setKey(lk);
>>    // do something
>> }
>> --------------------------
>> This produces the correct output - nothing, loop is not entered.
>> Regards,
>> Manfred
>> Am 12.03.2009 um 13:19 schrieb Troy A. Griffitts:
>>> Manfred,
>>>
>>> Are you specifically asking about how to obtain the ordinal count  
>>> of a traversable SWKey?
>>>
>>> If so, the official answer is, "you can't without counting  
>>> yourself". SWKey's which return true for isTraversible() don't  
>>> contractually offer their set count.  This is fairly common with  
>>> optimized object containers who's set count is not easily derived  
>>> (think of linked lists).
>>>
>>> Having said this, SWKey offers a bookmarking facility with long  
>>> SWKey::Index(), SWKey::Index(long).
>>>
>>> The longs can _usually_ be used to practically bound a 'range'.
>>>
>>> e.g.
>>>
>>> VerseKey *parser = (VerseKey *)kjv->getKey();
>>> ListKey keySet = parser->ParseVerseList("matt-jn", parser, true);
>>>
>>> keySet = TOP;
>>> long start = keySet.Index();
>>> keySet = BOTTOM;
>>> long end = keySet.Index();
>>>
>>> progressBar.setStart(start);
>>> progressBar.setEnd(end);
>>>
>>>
>>> for (keySet = TOP; !keySet.Error(); keySet++) {
>>>    progressBar.setValue(keySet.Index());
>>>    // process text here...
>>> }
>>>
>>>
>>> // Having said this, a few points:
>>>
>>> obvious fail case: "gen; rev22:21"
>>>
>>> true ordinal count:
>>> long i = 0; for (keySet = TOP; !keySet.Error(); keySet++) i++;
>>>
>>> finally, processing a set of display data should really not take  
>>> humanly noticeable times on even old desktop computers (or even  
>>> reasonably recent mobile devices).  We've actually, recently been  
>>> trying to optimize things on mobile devices for SwordReader and as  
>>> we continue to make improvements for these devices you should see  
>>> improvements on all platforms.  Please let us know with a snippet  
>>> of code which demonstrates an iteration which takes any noticeable  
>>> time to complete.
>>>
>>>    -Troy.
>>>
>>>
>>>
>>>
>>>
>>> Manfred Bergmann wrote:
>>>> Hi.
>>>> Another APi question:
>>>> In order to show a progress indicator to not bore the user when  
>>>> the cursor ball spins and a text pull takes a little longer I  
>>>> want to know how many verses need to be pulled before actually  
>>>> doing it.
>>>> This can be for any reference the user enters, "gen" or "gen  
>>>> 1,6,9" or anything like that.
>>>> What is the fastest way to do that?
>>>> Regards,
>>>> Manfred
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