middleUTF()

UTF and HTML/OS

I decided to roll my own UTF-8 string compatability.

So if you have a string of text that you know is UTF-8 encoded you can get its length and also parse it just like regular text.

Step 1.	Step 2.	Step 3.
Prepare: temp=asUTF(text)	Perform string manipulations using the alternative tags length_(temp), middle_(temp) etc (notice the underscore)...	Convert back to string text=asText(temp)

For Example this page...

<!doctype html>
<html lang="en">
 <head>
  <meta charset="utf-8">
  <title>UTF8 Demo</title>
 </head>
 <body>
  <<
   msg="Everybody is using emoticons (😊😋😨😆) These days"
   display "msg="+msg+'<br>' /display
   display "Length(msg)="+length(msg)+'<br>' /display
   msg2=asUTF(msg)
   display "Length_(msg2)="+length_(msg2)+'<br>' /display
   msg_middle=middle_(msg2,31,31)
   display '31st character is "'+asText(msg_middle)+'"' /display
  >>
 </body>
</html>

Would display this output...

msg=Everybody is using emoticons (😊😋😨😆) These days
Length(msg)=58
Length_(msg2)=46
31st character is "😊"

Here are the Functions

function asUTF(text) locals x,s,st,i,a do
 x=1
 st='ERROR'
 while x<length(text)+1 do
  i=getascii(middle(text,x,x))
    if i<192 then s=1
  elif i<224 then s=2
  elif i<240 then s=3
  elif i<248 then s=4
  elif i<252 then s=5
  elif i<254 then s=6
  /if
  a='ERROR'
  a=middle(text,x,x+(s-1))
  if st='ERROR' then st=a else st=merge(st,a) /if
  x=x+s
 /while
 return st /return
/function


function middle_(text_UTF,s,e) do
 return gettable(text_UTF,s,e,1,1) /return
/function


function length_(text_UTF) do
 return cols(text_UTF) /return
/function


function left_(text_UTF,i) do
 return gettable(text_UTF,1,i,1,1) /return
/function


function right_(text_UTF,i) locals l do
 l=cols(text_utf)
 return gettable(text_UTF,l-i+1,l,1,1) /return
/function


function reverse_(text_UTF,i) do
 return reversecols(text_UTF) /return
/function


function concat_(text1_UTF,text2_UTF) do
 return merge(text1_UTF,text2_UTF) /return
/function



function asText(text_UTF) locals text,x do
 text=''
 for name=x value=1 to cols(text_UTF) do
  text=text+text_UTF[x,1]
 /for
 return text /return
/function

middleUTF() (Permalink)