OpenEuphoria

Re: Tsunami wrappers

• Posted by jiri babor <jbabor at paradise.net.nz> Jan 19, 2004
• 484 views

Euman,

for a number of years I have been pushing the following alternatives, only
slightly faster, but much more elegant:


global function ltrim(sequence s)
    integer n

    n = length(s)
    for i = 1 to n do
        if s[i] != 32 then return s[i..n] end if
    end for
    return {}
end function

global function rtrim(sequence s)
    for i = length(s) to 1 by -1 do
        if s[i] != 32 then return s[1..i] end if
    end for
    return {}
end function

global function trim(sequence s)
    integer m,n

    m = 0
    n = length(s)
    for i = 1 to n do
        if s[i] != 32 then
            m = i
            exit
        end if
    end for
    if m then
        for i = n to m by -1 do
            if s[i] != 32 then return s[m..i] end if
        end for
    end if
    return {}
end function


----- Original Message ----- 
From: "Euman" <euman at bellsouth.net>
To: <EUforum at topica.com>
Sent: 20 January 2004 6:56 AM
Subject: Tsunami wrappers


>
>
> Hello all,
>
> 'Basic language coders may be interested too!'
>
> If you use Tsunami for Euphoria wrappers I have good news, thanks to
> Tommy Carlier for taking his time to tweak (for speed) most of the
> following routines that are located near the bottom of trm_eu.ew.
>
> These routines are really fast and allow you to use padded or delimited
> record data.
>
> Please make sure your version of the wrapper is current before update
>
> -- Current Version: 3.5.6.9
> -- January 11, 2004
>
> Simply copy over the old routines. There are two new routines here,
> they are trm_left and trm_right. 'code to follow below'
>
> btw, complete documentation for the wrappers use of tsunami will be free
> and finished this week. Registration of tsunami's trmpro version will
allow
> you access to the tsunami technical support, there I or Ron Austin can
help
> answer any questions regarding the record manager.
>
> register tsunami at www.trm-ug.com
>
>
> code:
>
> global function trm_ltrim(sequence s)
>     -- left trim 'white space'
>     integer i,len
>     len=length(s)
>     i=1
>     while i<=len and s[i]=32 do
>        i+=1
>     end while
>     return s[i..len]
> end function
>
> global function trm_rtrim(sequence s)
>   -- right trim 'white space'
>   integer i
>   i=length(s)
>   while i and s[i]=32 do
>      i-= 1
>   end while
>   return s[1..i]
> end function
>
> global function trm_trim(sequence s)
>   -- trim 'white space' from both ends of string s
>   integer i,j,len
>   len=length(s)
>   i=1
>   while i<=len and s[i]=32 do
>      i+=1
>   end while
>   j=len
>   while j>=i and s[j]=32 do
>      j-= 1
>   end while
>     return s[i..j]
> end function
>
> global function trm_mid(sequence s, integer start, integer len)
>    return s[start..start+len]
> end function
>
> global function trm_left(sequence s, integer len)
>     return s[1..len]
> end function
>
> global function trm_right(sequence s, integer len)
>  integer slen
>     slen = length(s)
>     return s[slen-len..slen]
> end function
>
> global function trm_abs(atom a)
>    if a < 0 then
>        return -a
>    else
>        return a
>    end if
> end function
>
> -- rpad returns string s with a spaces appended to right
> global function trm_rPad(object s, integer a)
>   integer len
>   len=length(s)
>   if len >= a then
>      return s
>   end if
>   return s & repeat(32, a - len)
> end function
>
> -- lpad returns string s with a spaces prepended on the left
> global function trm_lPad(object s, integer a)
>   integer len
>   len=length(s)
>   if len >= a then
>      return s
>   end if
>   return repeat(32, a - len) & s
> end function
>
> global function trm_Pack(sequence s, integer x)
>   integer len, index
>   sequence str, substr
>   len = length(s[1]) + 1
>   for i = 2 to length(s) do
>       len += length(s[i]) + 1
>   end for
>   str = repeat(x, len)
>   index = 1
>   for i = 1 to length(s) do
>       substr = s[i]
>       len = length(substr)
>       str[index..index + len - 1] = substr
>       index += len + 1
>   end for
<snip>

>
>