Double-Value Unicode?

Richmond richmondmathewson at gmail.com
Sat May 17 14:55:01 EDT 2014


On 17/05/14 20:54, Scott Rossi wrote:
> Maybe unnecessary for LC7, but for my work in LC6 (and anybody that's
> interested), I put together the following functions for converting a
> unicode surrogate pair to a single value and vice versa:
>
> function unicodePairToNum pNum1,pNum2
>      return (pNum1 - 55296) * 1024 + (pNum2 - 56320) + 65536
> end unicodePairToNum
>
> function numToUnicodePair pNum
>     put trunc((pNum - 65536)/1024 + 55296) into num1
>     put (pNum - 65536) mod 1024 + 56320 into num2
>     return num1,num2
> end numToUnicodePair
>
>
>
> Thanks to Richmond for the link to unicode character calculations:
> http://www.russellcottrell.com/greek/utilities/SurrogatePairCalculator.htm
>

http://forums.runrev.com/viewtopic.php?f=6&t=20433

Love, Richmond.

>
> One item that would be helpful to know is at what value does a unicode
> character start being represented as pairs?  Is 65536 the upper limit for
> single value characters?
>
>
> Thanks & Regards,
>
> Scott Rossi
> Creative Director
> Tactile Media, UX/UI Design
>
>
>
>
> On 5/16/14 4:58 PM, "Scott Rossi" <scott at tactilemedia.com> wrote:
>
>> Hi All:
>>
>> I thought I had figured out the display of Unicode glyphs in LC 6.6, and
>> then ran up against a threshold where the value of a character is
>> displayed as two values.  I'm guessing this is related to a "double-byte"
>> something or other.  How does one retrieve the value of a character as a
>> single value?
>>
>> For example, I can set the htmlText of a field to 📞 and get the
>> correct unicode character to display.  But when retrieving the value for
>> the character, I get: ��
>>
>> Can I encode/decode/jumpcode/flipcode something here to get a single
>> value
>> representation of the character?
>>
>> (Also, I'm unable set the value of the by setting the unicodeText to
>> numToChar(128222) -- only using the htmlText property seems to work).
>>
>>
>> Thanks for helping out this uniclueless dude.
>>
>> Regards,
>>
>> Scott Rossi
>> Creative Director
>> Tactile Media, UX/UI Design
>>
>
>
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