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<pre id='vimCodeElement'>
<span class="Comment">//: Extend 'new' to handle a unicode string literal argument.</span>
<span class="Delimiter">:(scenario new_string)</span>
def main [
<span class="Constant">1</span>:address:array:character<span class="Special"> <- </span><span class="Normal">new</span> [abc def]
<span class="Constant">2</span>:character<span class="Special"> <- </span>index *<span class="Constant">1</span>:address:array:character<span class="Delimiter">,</span> <span class="Constant">5</span>
]
<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>
def main [
<span class="Constant">1</span>:address:array:character<span class="Special"> <- </span><span class="Normal">new</span> [a«c]
<span class="Constant">2</span>:number<span class="Special"> <- </span>length *<span class="Constant">1</span>:address:array:character
<span class="Constant">3</span>:character<span class="Special"> <- </span>index *<span class="Constant">1</span>:address:array:character<span class="Delimiter">,</span> <span class="Constant">1</span>
]
<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 Check Special-cases")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_literal_string<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> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "Convert 'new' To 'allocate'")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">"new"</span> && is_literal_string<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> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">:(after "case NEW" following "Primitive Recipe Implementations")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_literal_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> <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_mu_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>
trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"new string alloc: "</span> << products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">int</span> new_mu_string<span class="Delimiter">(</span><span class="Normal">const</span> string& contents<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// allocate an array just large enough for it</span>
<span class="Normal">int</span> string_length = unicode_length<span class="Delimiter">(</span>contents<span class="Delimiter">);</span>
<span class="CommentedCode">//? Total_alloc += string_length+1;</span>
<span class="CommentedCode">//? Num_alloc++;</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="Normal">int</span> result = Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">;</span>
<span class="Comment">// initialize refcount</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> Current_routine<span class="Delimiter">-></span>alloc++<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span>
<span class="Comment">// store length</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> Current_routine<span class="Delimiter">-></span>alloc++<span class="Delimiter">,</span> string_length<span class="Delimiter">);</span>
<span class="Normal">int</span> curr = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">const</span> <span class="Normal">char</span>* raw_contents = contents<span class="Delimiter">.</span>c_str<span class="Delimiter">();</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> 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>
<span class="Normal">uint32_t</span> 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>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">,</span> 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">//: stash recognizes strings</span>
<span class="Delimiter">:(scenario stash_string)</span>
def main [
<span class="Constant">1</span>:address:array:character<span class="Special"> <- </span><span class="Normal">new</span> [abc]
stash [foo:]<span class="Delimiter">,</span> <span class="Constant">1</span>:address:array:character
]
<span class="traceContains">+app: foo: abc</span>
<span class="Delimiter">:(before "End print Special-cases(r, data)")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_mu_string<span class="Delimiter">(</span>r<span class="Delimiter">))</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>data<span class="Delimiter">));</span>
<span class="Identifier">return</span> read_mu_string<span class="Delimiter">(</span>data<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario unicode_string)</span>
def main [
<span class="Constant">1</span>:address:array:character<span class="Special"> <- </span><span class="Normal">new</span> [♠]
stash [foo:]<span class="Delimiter">,</span> <span class="Constant">1</span>:address:array:character
]
<span class="traceContains">+app: foo: ♠</span>
<span class="Delimiter">:(scenario stash_space_after_string)</span>
def main [
<span class="Constant">1</span>:address:array:character<span class="Special"> <- </span><span class="Normal">new</span> [abc]
stash <span class="Constant">1</span>:address:array:character<span class="Delimiter">,</span> [foo]
]
<span class="traceContains">+app: abc foo</span>
<span class="Delimiter">:(scenario stash_string_as_array)</span>
def main [
<span class="Constant">1</span>:address:array:character<span class="Special"> <- </span><span class="Normal">new</span> [abc]
stash *<span class="Constant">1</span>:address:array:character
]
<span class="traceContains">+app: 3 97 98 99</span>
<span class="Comment">//: fixes way more than just stash</span>
<span class="Delimiter">:(before "End Preprocess is_mu_string(reagent x)")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!canonize_type<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</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>
def main [
<span class="Constant">1</span>:address:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type
<span class="Constant">2</span>:address:array:character/<span class="Special">raw <- </span><span class="Normal">new</span> [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>
<span class="Normal">int</span> unicode_length<span class="Delimiter">(</span><span class="Normal">const</span> string& s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">const</span> <span class="Normal">char</span>* in = s<span class="Delimiter">.</span>c_str<span class="Delimiter">();</span>
<span class="Normal">int</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">int</span> curr = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">while</span> <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>
string read_mu_string<span class="Delimiter">(</span><span class="Normal">int</span> address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">""</span><span class="Delimiter">;</span>
address++<span class="Delimiter">;</span> <span class="Comment">// skip refcount</span>
<span class="Normal">int</span> size = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> address<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>size == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">""</span><span class="Delimiter">;</span>
ostringstream tmp<span class="Delimiter">;</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> curr = address+<span class="Constant">1</span><span class="Delimiter">;</span> curr <= address+size<span class="Delimiter">;</span> ++curr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
tmp << to_unicode<span class="Delimiter">(</span><span class="Normal">static_cast</span><<span class="Normal">uint32_t</span>><span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">)));</span>
<span class="Delimiter">}</span>
<span class="Identifier">return</span> tmp<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
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