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Ingy döt Net 2026-02-01 16:33:20 -08:00
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Task/Canonicalize-CIDR/Phix/canonicalize-cidr.phix
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(phixonline)-->
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span> <span style="color: #000080;font-style:italic;">-- (not likely useful)</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">canonicalize_cidr</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">cidr</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">cidr</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">substitute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cidr</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"."</span><span style="color: #0000FF;">,</span><span style="color: #008000;">" "</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- (else %d eats 0.0 etc)</span>
<span style="color: #008080;">if</span> <span style="color: #008080;">not</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #008000;">'/'</span><span style="color: #0000FF;">,</span><span style="color: #000000;">cidr</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span> <span style="color: #000000;">cidr</span> <span style="color: #0000FF;">&=</span> <span style="color: #008000;">"/32"</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">res</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">scanf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cidr</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%d %d %d %d/%d"</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">res</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">1</span> <span style="color: #008080;">then</span>
<span style="color: #004080;">integer</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">a</span><span style="color: #0000FF;">,</span><span style="color: #000000;">b</span><span style="color: #0000FF;">,</span><span style="color: #000000;">c</span><span style="color: #0000FF;">,</span><span style="color: #000000;">d</span><span style="color: #0000FF;">,</span><span style="color: #000000;">m</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">res</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">a</span><span style="color: #0000FF;">>=</span><span style="color: #000000;">0</span> <span style="color: #008080;">and</span> <span style="color: #000000;">a</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">255</span>
<span style="color: #008080;">and</span> <span style="color: #000000;">b</span><span style="color: #0000FF;">>=</span><span style="color: #000000;">0</span> <span style="color: #008080;">and</span> <span style="color: #000000;">b</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">255</span>
<span style="color: #008080;">and</span> <span style="color: #000000;">c</span><span style="color: #0000FF;">>=</span><span style="color: #000000;">0</span> <span style="color: #008080;">and</span> <span style="color: #000000;">c</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">255</span>
<span style="color: #008080;">and</span> <span style="color: #000000;">d</span><span style="color: #0000FF;">>=</span><span style="color: #000000;">0</span> <span style="color: #008080;">and</span> <span style="color: #000000;">d</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">255</span>
<span style="color: #008080;">and</span> <span style="color: #000000;">m</span><span style="color: #0000FF;">>=</span><span style="color: #000000;">1</span> <span style="color: #008080;">and</span> <span style="color: #000000;">m</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">32</span> <span style="color: #008080;">then</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">mask</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">power</span><span style="color: #0000FF;">(</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,</span><span style="color: #000000;">32</span><span style="color: #0000FF;">-</span><span style="color: #000000;">m</span><span style="color: #0000FF;">)-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span>
<span style="color: #000000;">addr</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">bytes_to_int</span><span style="color: #0000FF;">({</span><span style="color: #000000;">d</span><span style="color: #0000FF;">,</span><span style="color: #000000;">c</span><span style="color: #0000FF;">,</span><span style="color: #000000;">b</span><span style="color: #0000FF;">,</span><span style="color: #000000;">a</span><span style="color: #0000FF;">})</span>
<span style="color: #000000;">addr</span> <span style="color: #0000FF;">-=</span> <span style="color: #7060A8;">and_bits</span><span style="color: #0000FF;">(</span><span style="color: #000000;">addr</span><span style="color: #0000FF;">,</span><span style="color: #000000;">mask</span><span style="color: #0000FF;">)</span>
<span style="color: #0000FF;">{</span><span style="color: #000000;">d</span><span style="color: #0000FF;">,</span><span style="color: #000000;">c</span><span style="color: #0000FF;">,</span><span style="color: #000000;">b</span><span style="color: #0000FF;">,</span><span style="color: #000000;">a</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">int_to_bytes</span><span style="color: #0000FF;">(</span><span style="color: #000000;">addr</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">return</span> <span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"%d.%d.%d.%d/%d"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">a</span><span style="color: #0000FF;">,</span><span style="color: #000000;">b</span><span style="color: #0000FF;">,</span><span style="color: #000000;">c</span><span style="color: #0000FF;">,</span><span style="color: #000000;">d</span><span style="color: #0000FF;">,</span><span style="color: #000000;">m</span><span style="color: #0000FF;">})</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">return</span> <span style="color: #008000;">"???"</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
with javascript_semantics
function canonicalize_cidr(string cidr)
cidr = substitute(cidr,"."," ") -- (else %d eats 0.0 etc)
if not find('/',cidr) then cidr &= "/32" end if
sequence res = scanf(cidr,"%d %d %d %d/%d")
if length(res)=1 then
integer {a,b,c,d,m} = res[1]
if a>=0 and a<=255
and b>=0 and b<=255
and c>=0 and c<=255
and d>=0 and d<=255
and m>=1 and m<=32 then
atom mask = power(2,32-m)-1,
addr = bytes_to_int({d,c,b,a})
addr -= and_bits(addr,mask)
{d,c,b,a} = int_to_bytes(addr)
return sprintf("%d.%d.%d.%d/%d",{a,b,c,d,m})
end if
end if
return "???"
end function
<span style="color: #008080;">constant</span> <span style="color: #000000;">tests</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">"87.70.141.1/22"</span><span style="color: #0000FF;">,</span>
<span style="color: #008000;">"36.18.154.103/12"</span><span style="color: #0000FF;">,</span>
<span style="color: #008000;">"62.62.197.11/29"</span><span style="color: #0000FF;">,</span>
<span style="color: #008000;">"67.137.119.181/4"</span><span style="color: #0000FF;">,</span>
<span style="color: #008000;">"161.214.74.21/24"</span><span style="color: #0000FF;">,</span>
<span style="color: #008000;">"184.232.176.184/18"</span><span style="color: #0000FF;">}</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tests</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">ti</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">tests</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span>
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%-18s -&gt; %s\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">ti</span><span style="color: #0000FF;">,</span><span style="color: #000000;">canonicalize_cidr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">ti</span><span style="color: #0000FF;">)})</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
<!--
constant tests = {"87.70.141.1/22",
"36.18.154.103/12",
"62.62.197.11/29",
"67.137.119.181/4",
"161.214.74.21/24",
"184.232.176.184/18"}
for t in tests do
printf(1,"%-18s -> %s\n",{t,canonicalize_cidr(t)})
end for