[Lazarus] Does Lazarus support a complete Unicode Component Library?
José Mejuto
joshyfun at gmail.com
Mon Feb 14 21:28:49 CET 2011
Hello Lazarus-List,
Monday, February 14, 2011, 8:52:27 PM, you wrote:
>> Many people are concerned about "speed" due hidden conversions, so can
>> anybody tell me why ? Maybe I'm blind and I can not see something that
>> is absolutly a problem (except some pieces of RTL).
MvdV> Typical example is you mix two codebases which have a different opinion
MvdV> about the string type. Then for every transition between those two codebases
MvdV> you have a fair chance that a conversion is needed. It is throughout
MvdV> possible that if you do an Tstringlist.indexof() that you do as many
MvdV> conversions as elements in the stringlist (if your passed stringtype is
MvdV> different from the tstringlist one).
But you are in the same trouble if you use any other approach, or you
use your data in the same unicode format as the other codebase or you
update the codebase to use your "new" unicode format.
There isn't a solution for such situation. I'm currently working with
GeckoPort which uses WideString in every place and other special
strings. I know that conversions must happend so when I need to scan
for a string first convert my data to the "native" format and them
perform the scan.
I think expecting a TStringList in ansi encode to work transparently
and optimal using unicodestrings is just a dream, programmers should
update their codebase, but at least only for speed (reduce
autoconversions) and do not need to decide constantly which encoding
format is needed to call this or that function.
Using a different RTL for each encoding is even worst IMHO. But this
is just a simple opinion.
--
Best regards,
José
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