diff options
| author | Kartik K. Agaram <vc@akkartik.com> | 2015-07-13 20:53:41 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2015-07-13 20:53:41 -0700 |
| commit | 83fcebf3210b638d9f8248e0007e9f0c9804980a (patch) | |
| tree | 95c4855bef341e1d46eb4725b54a3eaaf6858f08 /html/043new.cc.html | |
| parent | 8b9f1750c74c7d3cca99d6949a90cd61eb8e0218 (diff) | |
| download | mu-83fcebf3210b638d9f8248e0007e9f0c9804980a.tar.gz | |
1778
Diffstat (limited to 'html/043new.cc.html')
| -rw-r--r-- | html/043new.cc.html | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/html/043new.cc.html b/html/043new.cc.html new file mode 100644 index 00000000..a34f46fc --- /dev/null +++ b/html/043new.cc.html @@ -0,0 +1,296 @@ +<!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 - 043new.cc</title> +<meta name="Generator" content="Vim/7.4"> +<meta name="plugin-version" content="vim7.4_v1"> +<meta name="syntax" content="cpp"> +<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-family: monospace; color: #eeeeee; background-color: #080808; } +* { font-size: 1.05em; } +.traceContains { color: #008000; } +.cSpecial { color: #008000; } +.Constant { color: #00a0a0; } +.SalientComment { color: #00ffff; } +.Comment { color: #9090ff; } +.Delimiter { color: #a04060; } +.Special { color: #ff6060; } +.CommentedCode { color: #6c6c6c; } +.Identifier { color: #804000; } +--> +</style> + +<script type='text/javascript'> +<!-- + +--> +</script> +</head> +<body> +<pre id='vimCodeElement'> +<span class="Comment">//: A simple memory allocator to create space for new variables at runtime.</span> + +<span class="Delimiter">:(scenarios run)</span> +<span class="Delimiter">:(scenario new)</span> +<span class="Comment"># call new two times with identical arguments; you should get back different results</span> +recipe main [ + <span class="Constant">1</span>:address:number/<span class="Special">raw <- </span>new number:type + <span class="Constant">2</span>:address:number/<span class="Special">raw <- </span>new number:type + <span class="Constant">3</span>:boolean/<span class="Special">raw <- </span>equal <span class="Constant">1</span>:address:number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">2</span>:address:number/<span class="Special">raw</span> +] +<span class="traceContains">+mem: storing 0 in location 3</span> + +<span class="Delimiter">:(before "End Globals")</span> +long long int Reserved_for_tests = <span class="Constant">1000</span><span class="Delimiter">;</span> +long long int Memory_allocated_until = Reserved_for_tests<span class="Delimiter">;</span> +long long int Initial_memory_per_routine = <span class="Constant">100000</span><span class="Delimiter">;</span> +<span class="Delimiter">:(before "End Setup")</span> +Memory_allocated_until = Reserved_for_tests<span class="Delimiter">;</span> +Initial_memory_per_routine = <span class="Constant">100000</span><span class="Delimiter">;</span> +<span class="Delimiter">:(before "End routine Fields")</span> +long long int alloc<span class="Delimiter">,</span> alloc_max<span class="Delimiter">;</span> +<span class="Delimiter">:(before "End routine Constructor")</span> +alloc = Memory_allocated_until<span class="Delimiter">;</span> +Memory_allocated_until += Initial_memory_per_routine<span class="Delimiter">;</span> +alloc_max = Memory_allocated_until<span class="Delimiter">;</span> +trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">"new"</span><span class="Delimiter">)</span> << <span class="Constant">"routine allocated memory from "</span> << alloc << <span class="Constant">" to "</span> << alloc_max<span class="Delimiter">;</span> + +<span class="SalientComment">//:: First handle 'type' operands.</span> + +<span class="Delimiter">:(before "End Mu Types Initialization")</span> +Type_ordinal[<span class="Constant">"type"</span>] = <span class="Constant">0</span><span class="Delimiter">;</span> +<span class="Delimiter">:(after "Per-recipe Transforms")</span> +<span class="Comment">// replace type names with type_ordinals</span> +if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">"new"</span>]<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Comment">// End NEW Transform Special-cases</span> + <span class="Comment">// first arg must be of type 'type'</span> + assert<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> >= <span class="Constant">1</span><span class="Delimiter">);</span> + if <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> + raise << <span class="Constant">"expected literal, got "</span> << inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>to_string<span class="Delimiter">()</span> << <span class="cSpecial">'\n'</span> << die<span class="Delimiter">();</span> + if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> != <span class="Constant">"type"</span><span class="Delimiter">)</span> + raise << <span class="Constant">"tried to allocate non-type "</span> << inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>to_string<span class="Delimiter">()</span> << <span class="Constant">" in recipe "</span> << Recipe[r]<span class="Delimiter">.</span>name << <span class="cSpecial">'\n'</span> << die<span class="Delimiter">();</span> + if <span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">.</span>find<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">)</span> == Type_ordinal<span class="Delimiter">.</span>end<span class="Delimiter">())</span> + raise << <span class="Constant">"unknown type "</span> << inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name << <span class="Constant">" in recipe "</span> << Recipe[r]<span class="Delimiter">.</span>name << <span class="cSpecial">'\n'</span> << die<span class="Delimiter">();</span> +<span class="CommentedCode">//? cerr << "type " << inst.ingredients.at(0).name << " => " << Type_ordinal[inst.ingredients.at(0).name] << '\n'; //? 1</span> + inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>set_value<span class="Delimiter">(</span>Type_ordinal[inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name]<span class="Delimiter">);</span> + trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">"new"</span><span class="Delimiter">)</span> << inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name << <span class="Constant">" -> "</span> << inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">;</span> + end_new_transform:<span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="SalientComment">//:: Now implement the primitive recipe.</span> +<span class="Comment">//: todo: build 'new' in mu itself</span> + +<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span> +NEW<span class="Delimiter">,</span> +<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span> +Recipe_ordinal[<span class="Constant">"new"</span>] = NEW<span class="Delimiter">;</span> +<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span> +case NEW: <span class="Delimiter">{</span> + <span class="Comment">// compute the space we need</span> + long long int size = <span class="Constant">0</span><span class="Delimiter">;</span> + long long int array_length = <span class="Constant">0</span><span class="Delimiter">;</span> + <span class="Delimiter">{</span> + vector<type_ordinal> type<span class="Delimiter">;</span> + assert<span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span> + type<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>value<span class="Delimiter">);</span> +<span class="CommentedCode">//? trace(Primitive_recipe_depth, "mem") << "type " << current_instruction().ingredients.at(0).to_string() << ' ' << type.size() << ' ' << type.back() << " has size " << size_of(type); //? 1</span> + if <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">)</span> > <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Comment">// array</span> + array_length = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span> + trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"array size is "</span> << array_length<span class="Delimiter">;</span> + size = array_length*size_of<span class="Delimiter">(</span>type<span class="Delimiter">)</span> + <span class="Comment">/*</span><span class="Comment">space for length</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + else <span class="Delimiter">{</span> + <span class="Comment">// scalar</span> + size = size_of<span class="Delimiter">(</span>type<span class="Delimiter">);</span> + <span class="Delimiter">}</span> + <span class="Delimiter">}</span> + <span class="Comment">// compute the region of memory to return</span> + <span class="Comment">// really crappy at the moment</span> + ensure_space<span class="Delimiter">(</span>size<span class="Delimiter">);</span> + const long long int result = Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">;</span> + trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"new alloc: "</span> << result<span class="Delimiter">;</span> +<span class="CommentedCode">//? trace(Primitive_recipe_depth, "mem") << "size: " << size << " locations"; //? 1</span> + <span class="Comment">// save result</span> + products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span> + products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>result<span class="Delimiter">);</span> + <span class="Comment">// initialize allocated space</span> + for <span class="Delimiter">(</span>long long int address = result<span class="Delimiter">;</span> address < result+size<span class="Delimiter">;</span> ++address<span class="Delimiter">)</span> <span class="Delimiter">{</span> + Memory[address] = <span class="Constant">0</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + if <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">)</span> > <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> + Memory[result] = array_length<span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Comment">// bump</span> + Current_routine<span class="Delimiter">-></span>alloc += size<span class="Delimiter">;</span> + <span class="Comment">// no support for reclaiming memory</span> + assert<span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>alloc <= Current_routine<span class="Delimiter">-></span>alloc_max<span class="Delimiter">);</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(code)</span> +void ensure_space<span class="Delimiter">(</span>long long int size<span class="Delimiter">)</span> <span class="Delimiter">{</span> + assert<span class="Delimiter">(</span>size <= Initial_memory_per_routine<span class="Delimiter">);</span> +<span class="CommentedCode">//? cout << Current_routine->alloc << " " << Current_routine->alloc_max << " " << size << '\n'; //? 1</span> + if <span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>alloc + size > Current_routine<span class="Delimiter">-></span>alloc_max<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Comment">// waste the remaining space and create a new chunk</span> + Current_routine<span class="Delimiter">-></span>alloc = Memory_allocated_until<span class="Delimiter">;</span> + Memory_allocated_until += Initial_memory_per_routine<span class="Delimiter">;</span> + Current_routine<span class="Delimiter">-></span>alloc_max = Memory_allocated_until<span class="Delimiter">;</span> + trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">"new"</span><span class="Delimiter">)</span> << <span class="Constant">"routine allocated memory from "</span> << Current_routine<span class="Delimiter">-></span>alloc << <span class="Constant">" to "</span> << Current_routine<span class="Delimiter">-></span>alloc_max<span class="Delimiter">;</span> + <span class="Delimiter">}</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(scenario new_initializes)</span> +<span class="Special">% Memory_allocated_until = 10;</span> +<span class="Special">% Memory[Memory_allocated_until] = 1;</span> +recipe main [ + <span class="Constant">1</span>:address:number<span class="Special"> <- </span>new number:type + <span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">1</span>:address:number/deref +] +<span class="traceContains">+mem: storing 0 in location 2</span> + +<span class="Delimiter">:(scenario new_array)</span> +recipe main [ + <span class="Constant">1</span>:address:array:number/<span class="Special">raw <- </span>new number:type<span class="Delimiter">,</span> <span class="Constant">5</span>:literal + <span class="Constant">2</span>:address:number/<span class="Special">raw <- </span>new number:type + <span class="Constant">3</span>:number/<span class="Special">raw <- </span>subtract <span class="Constant">2</span>:address:number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1</span>:address:array:number/<span class="Special">raw</span> +] +<span class="traceContains">+run: 1:address:array:number/raw <- new number:type, 5:literal</span> +<span class="traceContains">+mem: array size is 5</span> +<span class="Comment"># don't forget the extra location for array size</span> +<span class="traceContains">+mem: storing 6 in location 3</span> + +<span class="Delimiter">:(scenario new_empty_array)</span> +recipe main [ + <span class="Constant">1</span>:address:array:number/<span class="Special">raw <- </span>new number:type<span class="Delimiter">,</span> <span class="Constant">0</span>:literal + <span class="Constant">2</span>:address:number/<span class="Special">raw <- </span>new number:type + <span class="Constant">3</span>:number/<span class="Special">raw <- </span>subtract <span class="Constant">2</span>:address:number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1</span>:address:array:number/<span class="Special">raw</span> +] +<span class="traceContains">+run: 1:address:array:number/raw <- new number:type, 0:literal</span> +<span class="traceContains">+mem: array size is 0</span> +<span class="traceContains">+mem: storing 1 in location 3</span> + +<span class="Comment">//: Make sure that each routine gets a different alloc to start.</span> +<span class="Delimiter">:(scenario new_concurrent)</span> +recipe f1 [ + start-running f2:recipe + <span class="Constant">1</span>:address:number/<span class="Special">raw <- </span>new number:type + <span class="Comment"># wait for f2 to complete</span> + <span class="Delimiter">{</span> + loop-unless <span class="Constant">4</span>:number/<span class="Special">raw</span> + <span class="Delimiter">}</span> +] +recipe f2 [ + <span class="Constant">2</span>:address:number/<span class="Special">raw <- </span>new number:type + <span class="Comment"># hack: assumes scheduler implementation</span> + <span class="Constant">3</span>:boolean/<span class="Special">raw <- </span>equal <span class="Constant">1</span>:address:number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">2</span>:address:number/<span class="Special">raw</span> + <span class="Comment"># signal f2 complete</span> + <span class="Constant">4</span>:number/<span class="Special">raw <- </span>copy <span class="Constant">1</span>:literal +] +<span class="traceContains">+mem: storing 0 in location 3</span> + +<span class="Comment">//: If a routine runs out of its initial allocation, it should allocate more.</span> +<span class="Delimiter">:(scenario new_overflow)</span> +<span class="Special">% Initial_memory_per_routine = 2;</span> +recipe main [ + <span class="Constant">1</span>:address:number/<span class="Special">raw <- </span>new number:type + <span class="Constant">2</span>:address:point/<span class="Special">raw <- </span>new point:type <span class="Comment"># not enough room in initial page</span> +] +<span class="traceContains">+new: routine allocated memory from 1000 to 1002</span> +<span class="traceContains">+new: routine allocated memory from 1002 to 1004</span> + +<span class="SalientComment">//:: Next, extend 'new' to handle a unicode string literal argument.</span> + +<span class="Delimiter">:(scenario new_string)</span> +recipe main [ + <span class="Constant">1</span>:address:array:character<span class="Special"> <- </span>new [abc def] + <span class="Constant">2</span>:character<span class="Special"> <- </span>index <span class="Constant">1</span>:address:array:character/deref<span class="Delimiter">,</span> <span class="Constant">5</span>:literal +] +<span class="Comment"># number code for 'e'</span> +<span class="traceContains">+mem: storing 101 in location 2</span> + +<span class="Delimiter">:(scenario new_string_handles_unicode)</span> +recipe main [ + <span class="Constant">1</span>:address:array:character<span class="Special"> <- </span>new [a«c] + <span class="Constant">2</span>:number<span class="Special"> <- </span>length <span class="Constant">1</span>:address:array:character/deref + <span class="Constant">3</span>:character<span class="Special"> <- </span>index <span class="Constant">1</span>:address:array:character/deref<span class="Delimiter">,</span> <span class="Constant">1</span>:literal +] +<span class="traceContains">+mem: storing 3 in location 2</span> +<span class="Comment"># unicode for '«'</span> +<span class="traceContains">+mem: storing 171 in location 3</span> + +<span class="Delimiter">:(before "End NEW Transform Special-cases")</span> + if <span class="Delimiter">(</span>!inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">()</span> + && !inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>properties<span class="Delimiter">.</span>empty<span class="Delimiter">()</span> + && !inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>empty<span class="Delimiter">()</span> + && inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> == <span class="Constant">"literal-string"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Comment">// skip transform</span> + inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>initialized = <span class="Constant">true</span><span class="Delimiter">;</span> + <span class="Identifier">goto</span> end_new_transform<span class="Delimiter">;</span> + <span class="Delimiter">}</span> + +<span class="Delimiter">:(after "case NEW" following "Primitive Recipe Implementations")</span> +if <span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">))</span> + && current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> == <span class="Constant">"literal-string"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> + products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span> + products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>new_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">));</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(code)</span> +long long int new_string<span class="Delimiter">(</span>const string& contents<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Comment">// allocate an array just large enough for it</span> + long long int string_length = unicode_length<span class="Delimiter">(</span>contents<span class="Delimiter">);</span> +<span class="CommentedCode">//? cout << "string_length is " << string_length << '\n'; //? 1</span> + ensure_space<span class="Delimiter">(</span>string_length+<span class="Constant">1</span><span class="Delimiter">);</span> <span class="Comment">// don't forget the extra location for array size</span> + <span class="Comment">// initialize string</span> +<span class="CommentedCode">//? cout << "new string literal: " << current_instruction().ingredients.at(0).name << '\n'; //? 1</span> + long long int result = Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">;</span> + Memory[Current_routine<span class="Delimiter">-></span>alloc++] = string_length<span class="Delimiter">;</span> + long long int curr = <span class="Constant">0</span><span class="Delimiter">;</span> + const char* raw_contents = contents<span class="Delimiter">.</span>c_str<span class="Delimiter">();</span> + for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i < string_length<span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> + uint32_t curr_character<span class="Delimiter">;</span> + assert<span class="Delimiter">(</span>curr < SIZE<span class="Delimiter">(</span>contents<span class="Delimiter">));</span> + tb_utf8_char_to_unicode<span class="Delimiter">(</span>&curr_character<span class="Delimiter">,</span> &raw_contents[curr]<span class="Delimiter">);</span> + Memory[Current_routine<span class="Delimiter">-></span>alloc] = curr_character<span class="Delimiter">;</span> + curr += tb_utf8_char_length<span class="Delimiter">(</span>raw_contents[curr]<span class="Delimiter">);</span> + ++Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Comment">// mu strings are not null-terminated in memory</span> + <span class="Identifier">return</span> result<span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Comment">//: Allocate more to routine when initializing a literal string</span> +<span class="Delimiter">:(scenario new_string_overflow)</span> +<span class="Special">% Initial_memory_per_routine = 2;</span> +recipe main [ + <span class="Constant">1</span>:address:number/<span class="Special">raw <- </span>new number:type + <span class="Constant">2</span>:address:array:character/<span class="Special">raw <- </span>new [a] <span class="Comment"># not enough room in initial page, if you take the array size into account</span> +] +<span class="traceContains">+new: routine allocated memory from 1000 to 1002</span> +<span class="traceContains">+new: routine allocated memory from 1002 to 1004</span> + +<span class="Comment">//: helpers</span> +<span class="Delimiter">:(code)</span> +long long int unicode_length<span class="Delimiter">(</span>const string& s<span class="Delimiter">)</span> <span class="Delimiter">{</span> + const char* in = s<span class="Delimiter">.</span>c_str<span class="Delimiter">();</span> + long long int result = <span class="Constant">0</span><span class="Delimiter">;</span> + long long int curr = <span class="Constant">0</span><span class="Delimiter">;</span> + while <span class="Delimiter">(</span>curr < SIZE<span class="Delimiter">(</span>s<span class="Delimiter">))</span> <span class="Delimiter">{</span> <span class="Comment">// carefully bounds-check on the string</span> + <span class="Comment">// before accessing its raw pointer</span> + ++result<span class="Delimiter">;</span> + curr += tb_utf8_char_length<span class="Delimiter">(</span>in[curr]<span class="Delimiter">);</span> + <span class="Delimiter">}</span> + <span class="Identifier">return</span> result<span class="Delimiter">;</span> +<span class="Delimiter">}</span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |