macro/command/strscan.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
  "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
  <title>strscan</title>
  <meta http-equiv="Content-Style-Type" content="text/css">
  <link rel="stylesheet" href="../../style.css" type="text/css">
</head>

<body>


<h1>strscan</h1>

<p>
Searches for substring in string.
</p>

<h2>Format</h2>

<pre class="macro-syntax">
strscan &lt;string&gt; &lt;substring&gt;
</pre>

<h2>Remarks</h2>

<p>
Searches for &lt;substring&gt; in &lt;string&gt;.<br>
If &lt;substring&gt; is found, its position(1-origin) is returned in the system variable "result".<br>
If &lt;string&gt; contains more than one occurrence of &lt;substring&gt;, the position of the first one is returned. If &lt;substring&gt; is not found, "result" is set to zero.
</p>

<h2>Example</h2>

<pre class="macro-example">
strscan 'tera term' 'term'
; result = 6
int2str valstr result
messagebox valstr 'result'
</pre>

<pre class="macro-example">
; Converts a hex string to a hexadecimal and binary value
basenum='0060E3da'
base=16
call base2dec
int2str sdec decnum
messagebox sdec 'decnum'
base=2
call dec2base
messagebox basenum 'basenum'
end

:dec2base
basenum=''
tmp=decnum      ;modified so not destructive of decnum
while tmp &gt; 0
   strcopy '0123456789ABCDEF' (tmp%base)+1 1 basedig
   strconcat basedig basenum
   basenum=basedig
   tmp=tmp/base
endwhile
return

:base2dec
decnum=0
strlen basenum
len=result
for i 1 len
   strcopy basenum i 1 basedig
   decnum=decnum*base
   strscan '0123456789ABCDEFabcdef' basedig
   if result&gt;16 result=result-6      ;take care of lower case
   decnum=decnum+result-1
next
return
</pre>


<pre class="macro-example">
; Network IP calculation from IP and Subnet mask
ip='192.168.1.189'
sn='255.255.255.248'
bits=0          ;calculate bits &amp; first address in sn
bitstr='000 128 192 224 240 248 252 254 255'    ;lookup table for # bits
do
    str2int isn sn
    int2str stmp isn
    strscan bitstr stmp     ;use lookup table to find bits
    bits=bits+(result-1)/4
    str2int tmp ip      ;find net by bitwise AND of ip and mask
    sprintf2 net '%s%d' net tmp&amp;isn
    strscan sn '.'
    strcopy sn result+1 999 sn
    strscan ip '.'
    strcopy ip result+1 999 ip
    if result&gt;0 strconcat net '.'
loop while result&gt;0
messagebox bits 'bits'
messagebox net 'net'
</pre>


</body>
</html>