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| author | Kartik K. Agaram <vc@akkartik.com> | 2016-07-27 22:51:11 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2016-07-27 22:51:11 -0700 |
| commit | c842d90bbc5ab8f4fb88fb89ebb02c0c12051396 (patch) | |
| tree | 12f5b94028df14b2927299271c16c3aa5e1b1e93 /html/065duplex_list.mu.html | |
| parent | 0c44f591f4370ce7c06ef4b8ccbee513f3552b05 (diff) | |
| download | mu-c842d90bbc5ab8f4fb88fb89ebb02c0c12051396.tar.gz | |
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Diffstat (limited to 'html/065duplex_list.mu.html')
| -rw-r--r-- | html/065duplex_list.mu.html | 597 |
1 files changed, 597 insertions, 0 deletions
diff --git a/html/065duplex_list.mu.html b/html/065duplex_list.mu.html new file mode 100644 index 00000000..8dad9fc4 --- /dev/null +++ b/html/065duplex_list.mu.html @@ -0,0 +1,597 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> +<html> +<head> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<title>Mu - 065duplex_list.mu</title> +<meta name="Generator" content="Vim/7.4"> +<meta name="plugin-version" content="vim7.4_v2"> +<meta name="syntax" content="none"> +<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy="> +<meta name="colorscheme" content="minimal"> +<style type="text/css"> +<!-- +pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; } +body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color: #080808; } +* { font-size: 12pt; font-size: 1em; } +.muRecipe { color: #ff8700; } +.muData { color: #ffff00; } +.muScenario { color: #00af00; } +.Delimiter { color: #800080; } +.Comment { color: #9090ff; } +.Constant { color: #00a0a0; } +.Special { color: #c00000; } +.muControl { color: #c0a020; } +--> +</style> + +<script type='text/javascript'> +<!-- + +--> +</script> +</head> +<body> +<pre id='vimCodeElement'> +<span class="Comment"># A doubly linked list permits bidirectional traversal.</span> + +<span class="muData">container</span> duplex-list:_elem [ + value:_elem + next:address:duplex-list:_elem + prev:address:duplex-list:_elem +] + +<span class="Comment"># should I say in/contained-in:result, allow ingredients to refer to products?</span> +<span class="muRecipe">def</span> push x:_elem, in:address:duplex-list:_elem<span class="muRecipe"> -> </span>in:address:duplex-list:_elem [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + result:address:duplex-list:_elem<span class="Special"> <- </span>new <span class="Delimiter">{</span>(duplex-list _elem): type<span class="Delimiter">}</span> + *result<span class="Special"> <- </span>merge x, in, <span class="Constant">0</span> + <span class="Delimiter">{</span> + <span class="muControl">break-unless</span> in + *in<span class="Special"> <- </span>put *in, <span class="Constant">prev:offset</span>, result + <span class="Delimiter">}</span> + <span class="muControl">return</span> result <span class="Comment"># needed explicitly because we need to replace 'in' with 'result'</span> +] + +<span class="muRecipe">def</span> first in:address:duplex-list:_elem<span class="muRecipe"> -> </span>result:_elem [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + <span class="muControl">return-unless</span> in, <span class="Constant">0</span> + result<span class="Special"> <- </span>get *in, <span class="Constant">value:offset</span> +] + +<span class="muRecipe">def</span> next in:address:duplex-list:_elem<span class="muRecipe"> -> </span>result:address:duplex-list:_elem/contained-in:in [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + <span class="muControl">return-unless</span> in, <span class="Constant">0</span> + result<span class="Special"> <- </span>get *in, <span class="Constant">next:offset</span> +] + +<span class="muRecipe">def</span> prev in:address:duplex-list:_elem<span class="muRecipe"> -> </span>result:address:duplex-list:_elem/contained-in:in [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + <span class="muControl">return-unless</span> in, <span class="Constant">0</span> + result<span class="Special"> <- </span>get *in, <span class="Constant">prev:offset</span> + <span class="muControl">return</span> result +] + +<span class="muScenario">scenario</span> duplex-list-handling [ + run [ + <span class="Constant">local-scope</span> + <span class="Comment"># reserve locations 0-9 to check for missing null check</span> + <span class="Constant">10</span>:number/<span class="Special">raw <- </span>copy <span class="Constant">34</span> + <span class="Constant">11</span>:number/<span class="Special">raw <- </span>copy <span class="Constant">35</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">3</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">4</span>, list + list<span class="Special"> <- </span>push <span class="Constant">5</span>, list + list2:address:duplex-list:character<span class="Special"> <- </span>copy list + <span class="Constant">20</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">21</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">22</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">30</span>:address:duplex-list:character/<span class="Special">raw <- </span>next list2 + <span class="Constant">31</span>:character/<span class="Special">raw <- </span>first <span class="Constant">30</span>:address:duplex-list:character/<span class="Special">raw</span> + <span class="Constant">32</span>:address:duplex-list:character/<span class="Special">raw <- </span>next <span class="Constant">30</span>:address:duplex-list:character/<span class="Special">raw</span> + <span class="Constant">33</span>:address:duplex-list:character/<span class="Special">raw <- </span>prev <span class="Constant">30</span>:address:duplex-list:character/<span class="Special">raw</span> + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">40</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">41</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">50</span>:boolean/<span class="Special">raw <- </span>equal list, list2 + ] + memory-should-contain [ + <span class="Constant">0</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># no modifications to null pointers</span> + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">34</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">35</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">5</span> <span class="Comment"># scanning next</span> + <span class="Constant">21</span><span class="Special"> <- </span><span class="Constant">4</span> + <span class="Constant">22</span><span class="Special"> <- </span><span class="Constant">3</span> + <span class="Constant">30</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># null</span> + <span class="Constant">31</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># first of null</span> + <span class="Constant">32</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># next of null</span> + <span class="Constant">33</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># prev of null</span> + <span class="Constant">40</span><span class="Special"> <- </span><span class="Constant">4</span> <span class="Comment"># then start scanning prev</span> + <span class="Constant">41</span><span class="Special"> <- </span><span class="Constant">5</span> + <span class="Constant">50</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># list back at start</span> + ] +] + +<span class="Comment"># insert 'x' after 'in'</span> +<span class="muRecipe">def</span> insert x:_elem, in:address:duplex-list:_elem<span class="muRecipe"> -> </span>in:address:duplex-list:_elem [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + new-node:address:duplex-list:_elem<span class="Special"> <- </span>new <span class="Delimiter">{</span>(duplex-list _elem): type<span class="Delimiter">}</span> + *new-node<span class="Special"> <- </span>put *new-node, <span class="Constant">value:offset</span>, x + <span class="Comment"># save old next before changing it</span> + next-node:address:duplex-list:_elem<span class="Special"> <- </span>get *in, <span class="Constant">next:offset</span> + *in<span class="Special"> <- </span>put *in, <span class="Constant">next:offset</span>, new-node + *new-node<span class="Special"> <- </span>put *new-node, <span class="Constant">prev:offset</span>, in + *new-node<span class="Special"> <- </span>put *new-node, <span class="Constant">next:offset</span>, next-node + <span class="muControl">return-unless</span> next-node + *next-node<span class="Special"> <- </span>put *next-node, <span class="Constant">prev:offset</span>, new-node +] + +<span class="muScenario">scenario</span> inserting-into-duplex-list [ + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">3</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">4</span>, list + list<span class="Special"> <- </span>push <span class="Constant">5</span>, list + list2:address:duplex-list:character<span class="Special"> <- </span>next list <span class="Comment"># inside list</span> + list2<span class="Special"> <- </span>insert <span class="Constant">6</span>, list2 + <span class="Comment"># check structure like before</span> + list2<span class="Special"> <- </span>copy list + <span class="Constant">10</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">11</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">12</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">13</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">20</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">21</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">22</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">30</span>:boolean/<span class="Special">raw <- </span>equal list, list2 + ] + memory-should-contain [ + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">5</span> <span class="Comment"># scanning next</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">4</span> + <span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">6</span> <span class="Comment"># inserted element</span> + <span class="Constant">13</span><span class="Special"> <- </span><span class="Constant">3</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">6</span> <span class="Comment"># then prev</span> + <span class="Constant">21</span><span class="Special"> <- </span><span class="Constant">4</span> + <span class="Constant">22</span><span class="Special"> <- </span><span class="Constant">5</span> + <span class="Constant">30</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># list back at start</span> + ] +] + +<span class="muScenario">scenario</span> inserting-at-end-of-duplex-list [ + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">3</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">4</span>, list + list<span class="Special"> <- </span>push <span class="Constant">5</span>, list + list2:address:duplex-list:character<span class="Special"> <- </span>next list <span class="Comment"># inside list</span> + list2<span class="Special"> <- </span>next list2 <span class="Comment"># now at end of list</span> + list2<span class="Special"> <- </span>insert <span class="Constant">6</span>, list2 + <span class="Comment"># check structure like before</span> + list2<span class="Special"> <- </span>copy list + <span class="Constant">10</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">11</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">12</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">13</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">20</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">21</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">22</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">30</span>:boolean/<span class="Special">raw <- </span>equal list, list2 + ] + memory-should-contain [ + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">5</span> <span class="Comment"># scanning next</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">4</span> + <span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">3</span> + <span class="Constant">13</span><span class="Special"> <- </span><span class="Constant">6</span> <span class="Comment"># inserted element</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">3</span> <span class="Comment"># then prev</span> + <span class="Constant">21</span><span class="Special"> <- </span><span class="Constant">4</span> + <span class="Constant">22</span><span class="Special"> <- </span><span class="Constant">5</span> + <span class="Constant">30</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># list back at start</span> + ] +] + +<span class="muScenario">scenario</span> inserting-after-start-of-duplex-list [ + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">3</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">4</span>, list + list<span class="Special"> <- </span>push <span class="Constant">5</span>, list + list<span class="Special"> <- </span>insert <span class="Constant">6</span>, list + <span class="Comment"># check structure like before</span> + list2:address:duplex-list:character<span class="Special"> <- </span>copy list + <span class="Constant">10</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">11</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">12</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">13</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">20</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">21</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">22</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">30</span>:boolean/<span class="Special">raw <- </span>equal list, list2 + ] + memory-should-contain [ + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">5</span> <span class="Comment"># scanning next</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">6</span> <span class="Comment"># inserted element</span> + <span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">4</span> + <span class="Constant">13</span><span class="Special"> <- </span><span class="Constant">3</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">4</span> <span class="Comment"># then prev</span> + <span class="Constant">21</span><span class="Special"> <- </span><span class="Constant">6</span> + <span class="Constant">22</span><span class="Special"> <- </span><span class="Constant">5</span> + <span class="Constant">30</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># list back at start</span> + ] +] + +<span class="Comment"># remove 'x' from its surrounding list 'in'</span> +<span class="Comment">#</span> +<span class="Comment"># Returns null if and only if list is empty. Beware: in that case any other</span> +<span class="Comment"># pointers to the head are now invalid.</span> +<span class="muRecipe">def</span> remove x:address:duplex-list:_elem/contained-in:in, in:address:duplex-list:_elem<span class="muRecipe"> -> </span>in:address:duplex-list:_elem [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + <span class="Comment"># if 'x' is null, return</span> + <span class="muControl">return-unless</span> x + next-node:address:duplex-list:_elem<span class="Special"> <- </span>get *x, <span class="Constant">next:offset</span> + prev-node:address:duplex-list:_elem<span class="Special"> <- </span>get *x, <span class="Constant">prev:offset</span> + <span class="Comment"># null x's pointers</span> + *x<span class="Special"> <- </span>put *x, <span class="Constant">next:offset</span>, <span class="Constant">0</span> + *x<span class="Special"> <- </span>put *x, <span class="Constant">prev:offset</span>, <span class="Constant">0</span> + <span class="Comment"># if next-node is not null, set its prev pointer</span> + <span class="Delimiter">{</span> + <span class="muControl">break-unless</span> next-node + *next-node<span class="Special"> <- </span>put *next-node, <span class="Constant">prev:offset</span>, prev-node + <span class="Delimiter">}</span> + <span class="Comment"># if prev-node is not null, set its next pointer and return</span> + <span class="Delimiter">{</span> + <span class="muControl">break-unless</span> prev-node + *prev-node<span class="Special"> <- </span>put *prev-node, <span class="Constant">next:offset</span>, next-node + <span class="muControl">return</span> + <span class="Delimiter">}</span> + <span class="Comment"># if prev-node is null, then we removed the head node at 'in'</span> + <span class="Comment"># return the new head rather than the old 'in'</span> + <span class="muControl">return</span> next-node +] + +<span class="muScenario">scenario</span> removing-from-duplex-list [ + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">3</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">4</span>, list + list<span class="Special"> <- </span>push <span class="Constant">5</span>, list + list2:address:duplex-list:character<span class="Special"> <- </span>next list <span class="Comment"># second element</span> + list<span class="Special"> <- </span>remove list2, list + <span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>equal list2, <span class="Constant">0</span> + <span class="Comment"># check structure like before</span> + list2<span class="Special"> <- </span>copy list + <span class="Constant">11</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">12</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">20</span>:address:duplex-list:character/<span class="Special">raw <- </span>next list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">30</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">40</span>:boolean/<span class="Special">raw <- </span>equal list, list2 + ] + memory-should-contain [ + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># remove returned non-null</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">5</span> <span class="Comment"># scanning next, skipping deleted element</span> + <span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">3</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># no more elements</span> + <span class="Constant">30</span><span class="Special"> <- </span><span class="Constant">5</span> <span class="Comment"># prev of final element</span> + <span class="Constant">40</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># list back at start</span> + ] +] + +<span class="muScenario">scenario</span> removing-from-start-of-duplex-list [ + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">3</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">4</span>, list + list<span class="Special"> <- </span>push <span class="Constant">5</span>, list + list<span class="Special"> <- </span>remove list, list + <span class="Comment"># check structure like before</span> + list2:address:duplex-list:character<span class="Special"> <- </span>copy list + <span class="Constant">10</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">11</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">20</span>:address:duplex-list:character/<span class="Special">raw <- </span>next list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">30</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">40</span>:boolean/<span class="Special">raw <- </span>equal list, list2 + ] + memory-should-contain [ + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">4</span> <span class="Comment"># scanning next, skipping deleted element</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">3</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># no more elements</span> + <span class="Constant">30</span><span class="Special"> <- </span><span class="Constant">4</span> <span class="Comment"># prev of final element</span> + <span class="Constant">40</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># list back at start</span> + ] +] + +<span class="muScenario">scenario</span> removing-from-end-of-duplex-list [ + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">3</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">4</span>, list + list<span class="Special"> <- </span>push <span class="Constant">5</span>, list + <span class="Comment"># delete last element</span> + list2:address:duplex-list:character<span class="Special"> <- </span>next list + list2<span class="Special"> <- </span>next list2 + list<span class="Special"> <- </span>remove list2, list + <span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>equal list2, <span class="Constant">0</span> + <span class="Comment"># check structure like before</span> + list2<span class="Special"> <- </span>copy list + <span class="Constant">11</span>:character/<span class="Special">raw <- </span>first list2 + list2<span class="Special"> <- </span>next list2 + <span class="Constant">12</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">20</span>:address:duplex-list:character/<span class="Special">raw <- </span>next list2 + list2<span class="Special"> <- </span>prev list2 + <span class="Constant">30</span>:character/<span class="Special">raw <- </span>first list2 + <span class="Constant">40</span>:boolean/<span class="Special">raw <- </span>equal list, list2 + ] + memory-should-contain [ + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># remove returned non-null</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">5</span> <span class="Comment"># scanning next, skipping deleted element</span> + <span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">4</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># no more elements</span> + <span class="Constant">30</span><span class="Special"> <- </span><span class="Constant">5</span> <span class="Comment"># prev of final element</span> + <span class="Constant">40</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># list back at start</span> + ] +] + +<span class="muScenario">scenario</span> removing-from-singleton-duplex-list [ + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">3</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>remove list, list + <span class="Constant">1</span>:number/<span class="Special">raw <- </span>copy list + ] + memory-should-contain [ + <span class="Constant">1</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># back to an empty list</span> + ] +] + +<span class="Comment"># remove values between 'start' and 'end' (both exclusive).</span> +<span class="Comment"># also clear pointers back out from start/end for hygiene.</span> +<span class="Comment"># set end to 0 to delete everything past start.</span> +<span class="Comment"># can't set start to 0 to delete everything before end, because there's no</span> +<span class="Comment"># clean way to return the new head pointer.</span> +<span class="muRecipe">def</span> remove-between start:address:duplex-list:_elem, end:address:duplex-list:_elem/contained-in:start<span class="muRecipe"> -> </span>start:address:duplex-list:_elem [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + next:address:duplex-list:_elem<span class="Special"> <- </span>get *start, <span class="Constant">next:offset</span> + nothing-to-delete?:boolean<span class="Special"> <- </span>equal next, end + <span class="muControl">return-if</span> nothing-to-delete? + assert next, <span class="Constant">[malformed duplex list]</span> + <span class="Comment"># start->next->prev = 0</span> + <span class="Comment"># start->next = end</span> + *next<span class="Special"> <- </span>put *next, <span class="Constant">prev:offset</span>, <span class="Constant">0</span> + *start<span class="Special"> <- </span>put *start, <span class="Constant">next:offset</span>, end + <span class="muControl">return-unless</span> end + <span class="Comment"># end->prev->next = 0</span> + <span class="Comment"># end->prev = start</span> + prev:address:duplex-list:_elem<span class="Special"> <- </span>get *end, <span class="Constant">prev:offset</span> + assert prev, <span class="Constant">[malformed duplex list - 2]</span> + *prev<span class="Special"> <- </span>put *prev, <span class="Constant">next:offset</span>, <span class="Constant">0</span> + *end<span class="Special"> <- </span>put *end, <span class="Constant">prev:offset</span>, start +] + +<span class="muScenario">scenario</span> remove-range [ + <span class="Comment"># construct a duplex list with six elements [13, 14, 15, 16, 17, 18]</span> + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">18</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">17</span>, list + list<span class="Special"> <- </span>push <span class="Constant">16</span>, list + list<span class="Special"> <- </span>push <span class="Constant">15</span>, list + list<span class="Special"> <- </span>push <span class="Constant">14</span>, list + list<span class="Special"> <- </span>push <span class="Constant">13</span>, list + <span class="Constant">1</span>:address:duplex-list:character/<span class="Special">raw <- </span>copy list <span class="Comment"># save list</span> + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>copy <span class="Constant">1</span>:address:duplex-list:character/<span class="Special">raw</span> <span class="Comment"># restore list</span> + <span class="Comment"># delete 16 onwards</span> + <span class="Comment"># first pointer: to the third element</span> + list2:address:duplex-list:character<span class="Special"> <- </span>next list + list2<span class="Special"> <- </span>next list2 + list2<span class="Special"> <- </span>remove-between list2, <span class="Constant">0</span> + <span class="Comment"># now check the list</span> + <span class="Constant">10</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + list<span class="Special"> <- </span>next list + <span class="Constant">11</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + list<span class="Special"> <- </span>next list + <span class="Constant">12</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + <span class="Constant">20</span>:address:duplex-list:character/<span class="Special">raw <- </span>next list + ] + memory-should-contain [ + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">13</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">14</span> + <span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">15</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">0</span> + ] +] + +<span class="muScenario">scenario</span> remove-range-to-final [ + <span class="Constant">local-scope</span> + <span class="Comment"># construct a duplex list with six elements [13, 14, 15, 16, 17, 18]</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">18</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">17</span>, list + list<span class="Special"> <- </span>push <span class="Constant">16</span>, list + list<span class="Special"> <- </span>push <span class="Constant">15</span>, list + list<span class="Special"> <- </span>push <span class="Constant">14</span>, list + list<span class="Special"> <- </span>push <span class="Constant">13</span>, list + <span class="Constant">1</span>:address:duplex-list:character/<span class="Special">raw <- </span>copy list <span class="Comment"># save list</span> + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>copy <span class="Constant">1</span>:address:duplex-list:character/<span class="Special">raw</span> <span class="Comment"># restore list</span> + <span class="Comment"># delete 15, 16 and 17</span> + <span class="Comment"># start pointer: to the second element</span> + list2:address:duplex-list:character<span class="Special"> <- </span>next list + <span class="Comment"># end pointer: to the last (sixth) element</span> + end:address:duplex-list:character<span class="Special"> <- </span>next list2 + end<span class="Special"> <- </span>next end + end<span class="Special"> <- </span>next end + end<span class="Special"> <- </span>next end + remove-between list2, end + <span class="Comment"># now check the list</span> + <span class="Constant">10</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + list<span class="Special"> <- </span>next list + <span class="Constant">11</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + list<span class="Special"> <- </span>next list + <span class="Constant">12</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + <span class="Constant">20</span>:address:duplex-list:character/<span class="Special">raw <- </span>next list + ] + memory-should-contain [ + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">13</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">14</span> + <span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">18</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># no more elements</span> + ] +] + +<span class="muScenario">scenario</span> remove-range-empty [ + <span class="Constant">local-scope</span> + <span class="Comment"># construct a duplex list with three elements [13, 14, 15]</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">15</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">14</span>, list + list<span class="Special"> <- </span>push <span class="Constant">13</span>, list + <span class="Constant">1</span>:address:duplex-list:character/<span class="Special">raw <- </span>copy list <span class="Comment"># save list</span> + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>copy <span class="Constant">1</span>:address:duplex-list:character/<span class="Special">raw</span> <span class="Comment"># restore list</span> + <span class="Comment"># delete between first and second element (i.e. nothing)</span> + list2:address:duplex-list:character<span class="Special"> <- </span>next list + remove-between list, list2 + <span class="Comment"># now check the list</span> + <span class="Constant">10</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + list<span class="Special"> <- </span>next list + <span class="Constant">11</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + list<span class="Special"> <- </span>next list + <span class="Constant">12</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + <span class="Constant">20</span>:address:duplex-list:character/<span class="Special">raw <- </span>next list + ] + <span class="Comment"># no change</span> + memory-should-contain [ + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">13</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">14</span> + <span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">15</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">0</span> + ] +] + +<span class="muScenario">scenario</span> remove-range-to-end [ + <span class="Constant">local-scope</span> + <span class="Comment"># construct a duplex list with six elements [13, 14, 15, 16, 17, 18]</span> + list:address:duplex-list:character<span class="Special"> <- </span>push <span class="Constant">18</span>, <span class="Constant">0</span> + list<span class="Special"> <- </span>push <span class="Constant">17</span>, list + list<span class="Special"> <- </span>push <span class="Constant">16</span>, list + list<span class="Special"> <- </span>push <span class="Constant">15</span>, list + list<span class="Special"> <- </span>push <span class="Constant">14</span>, list + list<span class="Special"> <- </span>push <span class="Constant">13</span>, list + <span class="Constant">1</span>:address:duplex-list:character/<span class="Special">raw <- </span>copy list <span class="Comment"># save list</span> + run [ + <span class="Constant">local-scope</span> + list:address:duplex-list:character<span class="Special"> <- </span>copy <span class="Constant">1</span>:address:duplex-list:character/<span class="Special">raw</span> <span class="Comment"># restore list</span> + <span class="Comment"># remove the third element and beyond</span> + list2:address:duplex-list:character<span class="Special"> <- </span>next list + remove-between list2, <span class="Constant">0</span> + <span class="Comment"># now check the list</span> + <span class="Constant">10</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + list<span class="Special"> <- </span>next list + <span class="Constant">11</span>:character/<span class="Special">raw <- </span>get *list, <span class="Constant">value:offset</span> + <span class="Constant">20</span>:address:duplex-list:character/<span class="Special">raw <- </span>next list + ] + memory-should-contain [ + <span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">13</span> + <span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">14</span> + <span class="Constant">20</span><span class="Special"> <- </span><span class="Constant">0</span> + ] +] + +<span class="Comment"># insert list beginning at 'new' after 'in'</span> +<span class="muRecipe">def</span> insert-range in:address:duplex-list:_elem, start:address:duplex-list:_elem/contained-in:in<span class="muRecipe"> -> </span>in:address:duplex-list:_elem [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + <span class="muControl">return-unless</span> in + <span class="muControl">return-unless</span> start + end:address:duplex-list:_elem<span class="Special"> <- </span>copy start + <span class="Delimiter">{</span> + next:address:duplex-list:_elem<span class="Special"> <- </span>next end/insert-range + <span class="muControl">break-unless</span> next + end<span class="Special"> <- </span>copy next + <span class="muControl">loop</span> + <span class="Delimiter">}</span> + next:address:duplex-list:_elem<span class="Special"> <- </span>next in + *end<span class="Special"> <- </span>put *end, <span class="Constant">next:offset</span>, next + <span class="Delimiter">{</span> + <span class="muControl">break-unless</span> next + *next<span class="Special"> <- </span>put *next, <span class="Constant">prev:offset</span>, end + <span class="Delimiter">}</span> + *in<span class="Special"> <- </span>put *in, <span class="Constant">next:offset</span>, start + *start<span class="Special"> <- </span>put *start, <span class="Constant">prev:offset</span>, in +] + +<span class="muRecipe">def</span> append in:address:duplex-list:_elem, new:address:duplex-list:_elem/contained-in:in<span class="muRecipe"> -> </span>in:address:duplex-list:_elem [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + last:address:duplex-list:_elem<span class="Special"> <- </span>last in + *last<span class="Special"> <- </span>put *last, <span class="Constant">next:offset</span>, new + <span class="muControl">return-unless</span> new + *new<span class="Special"> <- </span>put *new, <span class="Constant">prev:offset</span>, last +] + +<span class="muRecipe">def</span> last in:address:duplex-list:_elem<span class="muRecipe"> -> </span>result:address:duplex-list:_elem [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + result<span class="Special"> <- </span>copy in + <span class="Delimiter">{</span> + next:address:duplex-list:_elem<span class="Special"> <- </span>next result + <span class="muControl">break-unless</span> next + result<span class="Special"> <- </span>copy next + <span class="muControl">loop</span> + <span class="Delimiter">}</span> +] + +<span class="Comment"># helper for debugging</span> +<span class="muRecipe">def</span> dump-from x:address:duplex-list:_elem [ + <span class="Constant">local-scope</span> + <span class="Constant">load-ingredients</span> + $print x, <span class="Constant">[: ]</span> + <span class="Delimiter">{</span> + <span class="muControl">break-unless</span> x + c:_elem<span class="Special"> <- </span>get *x, <span class="Constant">value:offset</span> + $print c, <span class="Constant">[ ]</span> + x<span class="Special"> <- </span>next x + <span class="Delimiter">{</span> + is-newline?:boolean<span class="Special"> <- </span>equal c, <span class="Constant">10/newline</span> + <span class="muControl">break-unless</span> is-newline? + $print <span class="Constant">10/newline</span> + $print x, <span class="Constant">[: ]</span> + <span class="Delimiter">}</span> + <span class="muControl">loop</span> + <span class="Delimiter">}</span> + $print <span class="Constant">10/newline</span>, <span class="Constant">[---]</span>, <span class="Constant">10/newline</span> +] +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |