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VList (view source)

Revision as of 21:49, 19 April 2022

19,430 bytes added ,  2 years ago
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→‎{{header|Phix}}: syntax coloured
m (→‎{{header|Phix}}: syntax coloured)
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=={{header|Phix}}==
<!--<lang Phix>enum OFFSET, (phixonline)-- (first spare slot [0=none])>
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
SEGMENTS
<span style="color: #008080;">enum</span> <span style="color: #000000;">OFFSET</span><span style="color: #0000FF;">,</span> <span style="color: #000080;font-style:italic;">-- (first spare slot [0=none])</span>
 
<span style="color: #000000;">SEGMENTS</span>
function new_vlist()
return {0,{}} -- offset of 0, no segments
<span style="color: #008080;">function</span> <span style="color: #000000;">new_vlist</span><span style="color: #0000FF;">()</span>
end function
<span style="color: #008080;">return</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,{}}</span> <span style="color: #000080;font-style:italic;">-- offset of 0, no segments</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function get_vlist(sequence v, integer k)
-- locate kth element
<span style="color: #008080;">function</span> <span style="color: #000000;">get_vlist</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">k</span><span style="color: #0000FF;">)</span>
if k>0 then
<span style="color: #000080;font-style:italic;">-- locate kth element</span>
k += v[OFFSET]
<span style="color: #008080;">if</span> <span style="color: #000000;">k</span><span style="color: #0000FF;">></span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
integer sg = 1
<span style="color: #000000;">k</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">OFFSET</span><span style="color: #0000FF;">]</span>
while sg<=length(v[SEGMENTS]) do
<span style="color: #004080;">integer</span> <span style="color: #000000;">sg</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span>
sequence vsg = v[SEGMENTS][sg]
<span style="color: #008080;">while</span> <span style="color: #000000;">sg</span><span style="color: #0000FF;"><=</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">])</span> <span style="color: #008080;">do</span>
if k<= length(vsg) then return vsg[k] end if
<span style="color: #004080;">sequence</span> <span style="color: #000000;">vsg</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">][</span><span style="color: #000000;">sg</span><span style="color: #0000FF;">]</span>
k -= length(vsg)
<span style="color: #008080;">if</span> <span style="color: #000000;">k</span><span style="color: #0000FF;"><=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">vsg</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #000000;">vsg</span><span style="color: #0000FF;">[</span><span style="color: #000000;">k</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
sg += 1
<span style="color: #000000;">k</span> <span style="color: #0000FF;">-=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">vsg</span><span style="color: #0000FF;">)</span>
end while
<span style="color: #000000;">sg</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
end if
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
throw("index out of range")
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end function
<span style="color: #008080;">throw</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"index out of range"</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function cons(sequence v, object a)
-- add an element to the front of v
<span style="color: #008080;">function</span> <span style="color: #000000;">cons</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">object</span> <span style="color: #000000;">a</span><span style="color: #0000FF;">)</span>
if length(v[SEGMENTS])=0 then
<span style="color: #000080;font-style:italic;">-- add an element to the front of v</span>
return {0,{{a}}}
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">])=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
end if
<span style="color: #008080;">return</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,{{</span><span style="color: #000000;">a</span><span style="color: #0000FF;">}}}</span>
integer offset = v[OFFSET]
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
if offset=0 then
<span style="color: #004080;">integer</span> <span style="color: #000000;">offset</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">OFFSET</span><span style="color: #0000FF;">]</span>
offset = length(v[SEGMENTS][1])*2
<span style="color: #008080;">if</span> <span style="color: #000000;">offset</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
v[SEGMENTS] = prepend(v[SEGMENTS],repeat(0,offset))
<span style="color: #000000;">offset</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">][</span><span style="color: #000000;">1</span><span style="color: #0000FF;">])*</span><span style="color: #000000;">2</span>
end if
<span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">prepend</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">],</span><span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">offset</span><span style="color: #0000FF;">))</span>
v[SEGMENTS][1][offset] = a
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
v[OFFSET] = offset-1
<span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">][</span><span style="color: #000000;">1</span><span style="color: #0000FF;">][</span><span style="color: #000000;">offset</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a</span>
return v
<span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">OFFSET</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">offset</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span>
end function
<span style="color: #008080;">return</span> <span style="color: #000000;">v</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function cdr(sequence v)
-- remove first element of v
<span style="color: #008080;">function</span> <span style="color: #000000;">cdr</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">)</span>
if length(v[SEGMENTS])=0 then
<span style="color: #000080;font-style:italic;">-- remove first element of v</span>
throw("cdr invoked on empty VList")
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">])=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
end if
<span style="color: #008080;">throw</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"cdr invoked on empty VList"</span><span style="color: #0000FF;">)</span>
integer offset = v[OFFSET]+1
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
if offset>length(v[SEGMENTS][1]) then
<span style="color: #004080;">integer</span> <span style="color: #000000;">offset</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">OFFSET</span><span style="color: #0000FF;">]+</span><span style="color: #000000;">1</span>
v[SEGMENTS] = v[SEGMENTS][2..$]
<span style="color: #008080;">if</span> <span style="color: #000000;">offset</span><span style="color: #0000FF;">></span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">][</span><span style="color: #000000;">1</span><span style="color: #0000FF;">])</span> <span style="color: #008080;">then</span>
v[OFFSET] = 1
<span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">][</span><span style="color: #000000;">2</span><span style="color: #0000FF;">..$]</span>
else
<span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">OFFSET</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span>
v[OFFSET] = offset
<span style="color: #008080;">else</span>
end if
<span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">OFFSET</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">offset</span>
return v
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end function
<span style="color: #008080;">return</span> <span style="color: #000000;">v</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function vlist_size(sequence v)
-- compute the size of v
<span style="color: #008080;">function</span> <span style="color: #000000;">vlist_size</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">)</span>
if length(v[SEGMENTS])=0 then return 0 end if
<span style="color: #000080;font-style:italic;">-- compute the size of v</span>
return length(v[SEGMENTS][1])*2 -v[OFFSET] -1
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">])=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> <span style="color: #008080;">return</span> <span style="color: #000000;">0</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end function
<span style="color: #008080;">return</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">][</span><span style="color: #000000;">1</span><span style="color: #0000FF;">])*</span><span style="color: #000000;">2</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">OFFSET</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function sprint_vlist(sequence v)
return sprint(flatten(v[SEGMENTS])[v[OFFSET]+1..$])
<span style="color: #008080;">function</span> <span style="color: #000000;">sprint_vlist</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">)</span>
end function
<span style="color: #008080;">return</span> <span style="color: #7060A8;">sprint</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">flatten</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">])[</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">OFFSET</span><span style="color: #0000FF;">]+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">..$])</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
procedure print_vlist_structure(sequence v)
printf(1,"Offset: %d\n",v[OFFSET])
<span style="color: #008080;">procedure</span> <span style="color: #000000;">print_vlist_structure</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">)</span>
pp(v[SEGMENTS],{pp_Nest,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;">"Offset: %d\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">OFFSET</span><span style="color: #0000FF;">])</span>
end procedure
<span style="color: #7060A8;">pp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">[</span><span style="color: #000000;">SEGMENTS</span><span style="color: #0000FF;">],{</span><span style="color: #004600;">pp_Nest</span><span style="color: #0000FF;">,</span><span style="color: #000000;">1</span><span style="color: #0000FF;">})</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
procedure main()
sequence v = new_vlist()
<span style="color: #008080;">procedure</span> <span style="color: #000000;">main</span><span style="color: #0000FF;">()</span>
printf(1,"Before adding any elements, empty VList: %s\n",{sprint_vlist(v)})
<span style="color: #004080;">sequence</span> <span style="color: #000000;">v</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">new_vlist</span><span style="color: #0000FF;">()</span>
print_vlist_structure(v)
<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;">"Before adding any elements, empty VList: %s\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">sprint_vlist</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)})</span>
<span style="color: #000000;">print_vlist_structure</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)</span>
for a=6 to 1 by -1 do v = cons(v,a) end for
printf(1,"Demonstrating cons method, 6 elements added: %s\n",{sprint_vlist(v)})
<span style="color: #008080;">for</span> <span style="color: #000000;">a</span><span style="color: #0000FF;">=</span><span style="color: #000000;">6</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> <span style="color: #000000;">v</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">cons</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">,</span><span style="color: #000000;">a</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
print_vlist_structure(v)
<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;">"Demonstrating cons method, 6 elements added: %s\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">sprint_vlist</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)})</span>
<span style="color: #000000;">print_vlist_structure</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)</span>
v = cdr(v)
printf(1,"Demonstrating cdr method, 1 element removed: %s\n",{sprint_vlist(v)})
<span style="color: #000000;">v</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">cdr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)</span>
print_vlist_structure(v)
<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;">"Demonstrating cdr method, 1 element removed: %s\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">sprint_vlist</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)})</span>
<span style="color: #000000;">print_vlist_structure</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)</span>
printf(1,"Demonstrating size property, size = %d\n",vlist_size(v))
-- (note this is 1-based indexing)
<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;">"Demonstrating size property, size = %d\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">vlist_size</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">))</span>
printf(1,"Demonstrating element access, v[3] = %d\n",get_vlist(v,3))
<span style="color: #000080;font-style:italic;">-- (note this is 1-based indexing)</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;">"Demonstrating element access, v[3] = %d\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">get_vlist</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">,</span><span style="color: #000000;">3</span><span style="color: #0000FF;">))</span>
v = cdr(cdr(cdr(v)))
printf(1,"Demonstrating cdr method again, 3 more elements removed: %s, size = %d\n",
<span style="color: #000000;">v</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">cdr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cdr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cdr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)))</span>
{sprint_vlist(v),vlist_size(v)})
<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;">"Demonstrating cdr method again, 3 more elements removed: %s, size = %d\n"</span><span style="color: #0000FF;">,</span>
print_vlist_structure(v)
<span style="color: #0000FF;">{</span><span style="color: #000000;">sprint_vlist</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">),</span><span style="color: #000000;">vlist_size</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)})</span>
 
<span style="color: #000000;">print_vlist_structure</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)</span>
for a=7 to 9 do v = cons(v,a) end for -- (this time not by -1; {9 8 7 5 6} is expected)
printf(1,"Demonstrating cons method, 3 more elements added: %s, size = %d\n",
<span style="color: #008080;">for</span> <span style="color: #000000;">a</span><span style="color: #0000FF;">=</span><span style="color: #000000;">7</span> <span style="color: #008080;">to</span> <span style="color: #000000;">9</span> <span style="color: #008080;">do</span> <span style="color: #000000;">v</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">cons</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">,</span><span style="color: #000000;">a</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">for</span> <span style="color: #000080;font-style:italic;">-- (this time not by -1; {9 8 7 5 6} is expected)</span>
{sprint_vlist(v),vlist_size(v)})
<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;">"Demonstrating cons method, 3 more elements added: %s, size = %d\n"</span><span style="color: #0000FF;">,</span>
print_vlist_structure(v)
<span style="color: #0000FF;">{</span><span style="color: #000000;">sprint_vlist</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">),</span><span style="color: #000000;">vlist_size</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)})</span>
 
<span style="color: #000000;">print_vlist_structure</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">)</span>
end procedure
main()</lang>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #000000;">main</span><span style="color: #0000FF;">()</span>
<!--</lang>-->
{{out}}
<pre>
Petelomax
7,795

edits

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