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Validate International Securities Identification Number: Difference between revisions

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Validate International Securities Identification Number (view source)

Revision as of 22:24, 18 April 2022

9,004 bytes added ,  2 years ago
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→‎{{header|Phix}}: syntax coloured
m (→‎{{header|Phix}}: syntax coloured)
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=={{header|Phix}}==
Note this (slightly better) version of Luhn() has the reverse() inside it, whereas the original did not.
<!--<lang Phix>function Luhn(string stphixonline)-->
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
integer s=0, d
<span style="color: #008080;">function</span> <span style="color: #000000;">Luhn</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">st</span><span style="color: #0000FF;">)</span>
st = reverse(st)
<span style="color: #004080;">integer</span> <span style="color: #000000;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">d</span>
for i=1 to length(st) do
<span style="color: #000000;">st</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">reverse</span><span style="color: #0000FF;">(</span><span style="color: #000000;">st</span><span style="color: #0000FF;">)</span>
d = st[i]-'0'
<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;">st</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
s += iff(mod(i,2)?d,d*2-(d>4)*9)
<span style="color: #000000;">d</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">st</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]-</span><span style="color: #008000;">'0'</span>
end for
<span style="color: #000000;">s</span> <span style="color: #0000FF;">+=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">mod</span><span style="color: #0000FF;">(</span><span style="color: #000000;">i</span><span style="color: #0000FF;">,</span><span style="color: #000000;">2</span><span style="color: #0000FF;">)?</span><span style="color: #000000;">d</span><span style="color: #0000FF;">,</span><span style="color: #000000;">d</span><span style="color: #0000FF;">*</span><span style="color: #000000;">2</span><span style="color: #0000FF;">-(</span><span style="color: #000000;">d</span><span style="color: #0000FF;">></span><span style="color: #000000;">4</span><span style="color: #0000FF;">)*</span><span style="color: #000000;">9</span><span style="color: #0000FF;">)</span>
return remainder(s,10)=0
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
end function
<span style="color: #008080;">return</span> <span style="color: #7060A8;">remainder</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">,</span><span style="color: #000000;">10</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">0</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function valid_ISIN(string st)
-- returns 1 if valid, else 0/2/3/4.▼
<span style="color: #008080;">function</span> <span style="color: #000000;">valid_ISIN</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">st</span><span style="color: #0000FF;">)</span>
-- (feel free to return 0 instead of 2/3/4)▼
▲ <span style="color: #000080;font-style:italic;">-- returns 1 if valid, else 0/2/3/4.
if length(st)!=12 then return 2 end if
▲ -- (feel free to return 0 instead of 2/3/4)</span>
for i=length(st) to 1 by -1 do
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">st</span><span style="color: #0000FF;">)!=</span><span style="color: #000000;">12</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #000000;">2</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
integer ch = st[i]
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">st</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">to</span> <span style="color: #000000;">1</span> <span style="color: #008080;">by</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span> <span style="color: #008080;">do</span>
if ch>='A' then
<span style="color: #004080;">integer</span> <span style="color: #000000;">ch</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">st</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span>
if ch>'Z' then return 3 end if
<span style="color: #008080;">if</span> <span style="color: #000000;">ch</span><span style="color: #0000FF;">>=</span><span style="color: #008000;">'A'</span> <span style="color: #008080;">then</span>
st[i..i] = sprintf("%d",ch-55)
<span style="color: #008080;">if</span> <span style="color: #000000;">ch</span><span style="color: #0000FF;">></span><span style="color: #008000;">'Z'</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #000000;">3</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
elsif i<=2 then
<span style="color: #000000;">st</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">..</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"%d"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">ch</span><span style="color: #0000FF;">-</span><span style="color: #000000;">55</span><span style="color: #0000FF;">)</span>
return 4
<span style="color: #008080;">elsif</span> <span style="color: #000000;">i</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">2</span> <span style="color: #008080;">then</span>
elsif ch<'0' or ch>'9' then
<span style="color: #008080;">return</span> <span style="color: #000000;">4</span>
return 3
<span style="color: #008080;">elsif</span> <span style="color: #000000;">ch</span><span style="color: #0000FF;"><</span><span style="color: #008000;">'0'</span> <span style="color: #008080;">or</span> <span style="color: #000000;">ch</span><span style="color: #0000FF;">></span><span style="color: #008000;">'9'</span> <span style="color: #008080;">then</span>
end if
<span style="color: #008080;">return</span> <span style="color: #000000;">3</span>
end for
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
return Luhn(st)
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
end function
<span style="color: #008080;">return</span> <span style="color: #000000;">Luhn</span><span style="color: #0000FF;">(</span><span style="color: #000000;">st</span><span style="color: #0000FF;">)</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
sequence tests = {"US0378331005", -- valid
"US0373831005", -- not valid The transposition typo is caught by the checksum constraint.
<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;">"US0378331005"</span><span style="color: #0000FF;">,</span> <span style="color: #000080;font-style:italic;">-- valid </span>
"U50378331005", -- not valid The substitution typo is caught by the format constraint.▼
<span style="US03378331005color: #008000;">"US0373831005"</span><span style="color: #0000FF;">,</span> <span style="color: #000080;font-style:italic;">-- not valid The duplicationtransposition typo is caught by the formatchecksum constraint.</span>
▲ <span style="color: #008000;">"U50378331005"</span><span style="color: #0000FF;">,</span> <span style="color: #000080;font-style:italic;">-- not valid The substitution typo is caught by the format constraint.</span>
"AU0000XVGZA3", -- valid
<span style="AU0000VXGZA3color: #008000;">"US03378331005"</span><span style="color: #0000FF;">,</span> <span style="color: #000080;font-style:italic;">-- not valid Unfortunately, not all transposition typosThe duplication typo areis caught by the checksumformat constraint.</span>
<span style="color: #008000;">"AU0000XVGZA3"</span><span style="color: #0000FF;">,</span> <span style="color: #000080;font-style:italic;">-- valid </span>
"FR0000988040"} -- valid
<span style="color: #008000;">"AU0000VXGZA3"</span><span style="color: #0000FF;">,</span> <span style="color: #000080;font-style:italic;">-- valid Unfortunately, not all transposition typos are caught by the checksum constraint.</span>
 
<span style="color: #008000;">"FR0000988040"</span><span style="color: #0000FF;">},</span> <span style="color: #000080;font-style:italic;">-- valid</span>
constant reasons = {"wrong checksum","valid","wrong length","bad char","wrong country"}
 
<span style="color: #000000;">reasons</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">"wrong checksum"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"valid"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"wrong length"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"bad char"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"wrong country"</span><span style="color: #0000FF;">}</span>
for i=1 to length(tests) do
string ti = tests[i]
<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>
printf(1,"%s : %s\n",{ti,reasons[valid_ISIN(ti)+1]})
<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;">"%s : %s\n"</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: #000000;">reasons</span><span style="color: #0000FF;">[</span><span style="color: #000000;">valid_ISIN</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: #000000;">1</span><span style="color: #0000FF;">]})</span>
end for</lang>▼
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
▲end for<!--</lang>-->
{{out}}
<pre>
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