# strscan

Searches for substring in string.

## Format

    strscan <string> <substring>

## Remarks

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

## Example

    strscan 'tera term' 'term'
    ; result = 6
    int2str valstr result
    messagebox valstr 'result'

    ; 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>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>16 result=result-6      ;take care of lower case
       decnum=decnum+result-1
    next
    return

    ; Network IP calculation from IP and Subnet mask
    ip='192.168.1.189'
    sn='255.255.255.248'
    bits=0          ;calculate bits & 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&isn
        strscan sn '.'
        strcopy sn result+1 999 sn
        strscan ip '.'
        strcopy ip result+1 999 ip
        if result>0 strconcat net '.'
    loop while result>0
    messagebox bits 'bits'
    messagebox net 'net'