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File extension is in extensions list: Difference between revisions

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File extension is in extensions list (view source)

Revision as of 17:40, 16 January 2022

5,412 bytes added ,  2 years ago
m
→‎{{header|Phix}}: added syntax colouring, marked p2js compatible
(File extension is in extensions list in various BASIC dialents)
m (→‎{{header|Phix}}: added syntax colouring, marked p2js compatible)
Line 1,774:
=={{header|Phix}}==
Note there is builtin, however get_file_extension("MyData_v1.0.tar.bz2") yields "bz2", since it scans right-to-left for the '.', and also it also yields "so" for "libglfw.so.3.1" (it saves the "1", and the "3", but when they are all-number it carries on scanning left and replaces if it finds another '.'). So to match the task requirements more precisely we shall write a custom version.
<!--<lang Phix>(phixonline)-->
<lang Phix>constant extensions = lower({"zip","rar","7z","gz","archive","A##","tar.bz2"})
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
 
<span style="color: #008080;">constant</span> <span style="color: #000000;">extensions</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">lower</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"zip"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"rar"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"7z"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"gz"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"archive"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"A##"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"tar.bz2"</span><span style="color: #0000FF;">})</span>
global function get_known_extension(string filename)
filename = get_file_name(filename)
<span style="color: #008080;">global</span> <span style="color: #008080;">function</span> <span style="color: #000000;">get_known_extension</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">filename</span><span style="color: #0000FF;">)</span>
for i=1 to length(filename) do
<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;">filename</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
if filename[i]='.' then
<span style="color: #008080;">if</span> <span style="color: #000000;">filename</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]=</span><span style="color: #008000;">'.'</span> <span style="color: #008080;">then</span>
string extension = lower(filename[i+1..$])
<span style="color: #004080;">string</span> <span style="color: #000000;">extension</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">lower</span><span style="color: #0000FF;">(</span><span style="color: #000000;">filename</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">..$])</span>
if find(extension,extensions) then
<span style="color: #008080;">if</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #000000;">extension</span><span style="color: #0000FF;">,</span><span style="color: #000000;">extensions</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span>
return extension
<span style="color: #008080;">return</span> <span style="color: #000000;">extension</span>
end if
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end if
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end for
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
return ""
<span style="color: #008080;">return</span> <span style="color: #008000;">""</span>
end function
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
 
constant tests = {"MyData.a##",
<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;">"MyData.a##"</span><span style="color: #0000FF;">,</span>
"MyData.tar.Gz",
<span style="color: #008000;">"MyData.gziptar.Gz"</span><span style="color: #0000FF;">,</span>
<span style="color: #008000;">"MyData.7z.backupgzip"</span><span style="color: #0000FF;">,</span>
<span style="color: #008000;">"MyData.7z..backup"</span><span style="color: #0000FF;">,</span>
<span style="color: #008000;">"MyData..."</span><span style="color: #0000FF;">,</span>
<span style="color: #008000;">"MyData"</span><span style="color: #0000FF;">,</span>
"MyData_v1.0.tar.bz2",
<span style="color: #008000;">"MyData_v1.0.tar.bz2"}</span><span style="color: #0000FF;">,</span>
<span style="color: #008000;">"MyData_v1.0.bz2"</span><span style="color: #0000FF;">}</span>
 
for i=1 to length(tests) do
<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>
string ti = tests[i],
<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>
ext = get_known_extension(ti)
<span style="color: #000000;">ext</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_known_extension</span><span style="color: #0000FF;">(</span><span style="color: #000000;">ti</span><span style="color: #0000FF;">)</span>
printf(1,"%-20s %-10s %s\n",{ti,ext,{"true","false"}[2-(find(ext,extensions)!=0)]})
<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;">"%-20s %-10s %s\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">ti</span><span style="color: #0000FF;">,</span><span style="color: #000000;">ext</span><span style="color: #0000FF;">,{</span><span style="color: #008000;">"true"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"false"</span><span style="color: #0000FF;">}[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">-(</span><span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #000000;">ext</span><span style="color: #0000FF;">,</span><span style="color: #000000;">extensions</span><span style="color: #0000FF;">)!=</span><span style="color: #000000;">0</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>
Petelomax
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