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<span class="Comment">//: Clean syntax to manipulate and check the file system in scenarios.</span>
<span class="Comment">//: Instructions 'assume-filesystem' and 'filesystem-should-contain' implicitly create</span>
<span class="Comment">//: a variable called 'filesystem' that is accessible to later instructions in</span>
<span class="Comment">//: the scenario. 'filesystem-should-contain' can check unicode characters in</span>
<span class="Comment">//: the fake filesystem</span>
<span class="Delimiter">:(scenarios run_mu_scenario)</span>
<span class="Delimiter">:(scenario simple_filesystem)</span>
scenario assume-filesystem [
local-scope
assume-filesystem [
<span class="Comment"># file 'a' containing two lines of data</span>
[a]<span class="Special"> <- </span>[
|a bc|
|de f|
]
<span class="Comment"># directory 'b' containing two files, 'c' and 'd'</span>
[b/c]<span class="Special"> <- </span>[]
[b/d]<span class="Special"> <- </span>[
|xyz|
]
]
<span class="Normal">data</span>:address:array:file-mapping<span class="Special"> <- </span>get *filesystem:address:filesystem<span class="Delimiter">,</span> data:offset
<span class="Normal">file1</span>:file-mapping<span class="Special"> <- </span>index *data<span class="Delimiter">,</span> <span class="Constant">0</span>
file1-name:address:array:character<span class="Special"> <- </span>get file1<span class="Delimiter">,</span> name:offset
<span class="Constant">10</span>:array:character/<span class="Special">raw <- </span>copy *file1-name
file1-contents:address:array:character<span class="Special"> <- </span>get file1<span class="Delimiter">,</span> contents:offset
<span class="Constant">100</span>:array:character/<span class="Special">raw <- </span>copy *file1-contents
<span class="Normal">file2</span>:file-mapping<span class="Special"> <- </span>index *data<span class="Delimiter">,</span> <span class="Constant">1</span>
file2-name:address:array:character<span class="Special"> <- </span>get file2<span class="Delimiter">,</span> name:offset
<span class="Constant">30</span>:array:character/<span class="Special">raw <- </span>copy *file2-name
file2-contents:address:array:character<span class="Special"> <- </span>get file2<span class="Delimiter">,</span> contents:offset
<span class="Constant">40</span>:array:character/<span class="Special">raw <- </span>copy *file2-contents
<span class="Normal">file3</span>:file-mapping<span class="Special"> <- </span>index *data<span class="Delimiter">,</span> <span class="Constant">2</span>
file3-name:address:array:character<span class="Special"> <- </span>get file3<span class="Delimiter">,</span> name:offset
<span class="Constant">50</span>:array:character/<span class="Special">raw <- </span>copy *file3-name
file3-contents:address:array:character<span class="Special"> <- </span>get file3<span class="Delimiter">,</span> contents:offset
<span class="Constant">60</span>:array:character/<span class="Special">raw <- </span>copy *file3-contents
memory-should-contain [
<span class="Constant">10</span>:array:character<span class="Special"> <- </span>[a]
<span class="Constant">100</span>:array:character<span class="Special"> <- </span>[a bc
de f
]
<span class="Constant">30</span>:array:character<span class="Special"> <- </span>[b/c]
<span class="Constant">40</span>:array:character<span class="Special"> <- </span>[]
<span class="Constant">50</span>:array:character<span class="Special"> <- </span>[b/d]
<span class="Constant">60</span>:array:character<span class="Special"> <- </span>[xyz
]
]
]
<span class="Delimiter">:(scenario escaping_file_contents)</span>
scenario assume-filesystem [
local-scope
assume-filesystem [
<span class="Comment"># file 'a' containing a '|'</span>
<span class="Comment"># need to escape '\' once for each block</span>
[a]<span class="Special"> <- </span>[
|x\\\\|yz|
]
]
<span class="Normal">data</span>:address:array:file-mapping<span class="Special"> <- </span>get *filesystem:address:filesystem<span class="Delimiter">,</span> data:offset
<span class="Normal">file1</span>:file-mapping<span class="Special"> <- </span>index *data<span class="Delimiter">,</span> <span class="Constant">0</span>
file1-name:address:array:character<span class="Special"> <- </span>get file1<span class="Delimiter">,</span> name:offset
<span class="Constant">10</span>:array:character/<span class="Special">raw <- </span>copy *file1-name
file1-contents:address:array:character<span class="Special"> <- </span>get file1<span class="Delimiter">,</span> contents:offset
<span class="Constant">20</span>:array:character/<span class="Special">raw <- </span>copy *file1-contents
memory-should-contain [
<span class="Constant">10</span>:array:character<span class="Special"> <- </span>[a]
<span class="Constant">20</span>:array:character<span class="Special"> <- </span>[x|yz
]
]
]
<span class="Delimiter">:(before "End Globals")</span>
<span class="Normal">extern</span> <span class="Normal">const</span> <span class="Normal">int</span> FILESYSTEM = Next_predefined_global_for_scenarios++<span class="Delimiter">;</span>
<span class="Comment">//: give 'filesystem' a fixed location in scenarios</span>
<span class="Delimiter">:(before "End Special Scenario Variable Names(r)")</span>
Name[r][<span class="Constant">"filesystem"</span>] = FILESYSTEM<span class="Delimiter">;</span>
<span class="Comment">//: make 'filesystem' always a raw location in scenarios</span>
<span class="Delimiter">:(before "End is_special_name Cases")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>s == <span class="Constant">"filesystem"</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End initialize_transform_rewrite_literal_string_to_text()")</span>
recipes_taking_literal_strings<span class="Delimiter">.</span>insert<span class="Delimiter">(</span><span class="Constant">"assume-filesystem"</span><span class="Delimiter">);</span>
<span class="Comment">//: screen-should-contain is a regular instruction</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
ASSUME_FILESYSTEM<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"assume-filesystem"</span><span class="Delimiter">,</span> ASSUME_FILESYSTEM<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
<span class="Normal">case</span> ASSUME_FILESYSTEM: <span class="Delimiter">{</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span class="Normal">case</span> ASSUME_FILESYSTEM: <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
assume_filesystem<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> current_recipe_name<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">void</span> assume_filesystem<span class="Delimiter">(</span><span class="Normal">const</span> string& data<span class="Delimiter">,</span> <span class="Normal">const</span> string& caller<span class="Delimiter">)</span> <span class="Delimiter">{</span>
map<string<span class="Delimiter">,</span> string> contents<span class="Delimiter">;</span>
parse_filesystem<span class="Delimiter">(</span>data<span class="Delimiter">,</span> contents<span class="Delimiter">,</span> caller<span class="Delimiter">);</span>
construct_filesystem_object<span class="Delimiter">(</span>contents<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Normal">void</span> parse_filesystem<span class="Delimiter">(</span><span class="Normal">const</span> string& data<span class="Delimiter">,</span> map<string<span class="Delimiter">,</span> string>& out<span class="Delimiter">,</span> <span class="Normal">const</span> string& caller<span class="Delimiter">)</span> <span class="Delimiter">{</span>
istringstream in<span class="Delimiter">(</span>data<span class="Delimiter">);</span>
in >> std::noskipws<span class="Delimiter">;</span>
<span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
string filename = next_filesystem_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>*filename<span class="Delimiter">.</span>begin<span class="Delimiter">()</span> != <span class="Constant">'['</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << caller << <span class="Constant">": assume-filesystem: filename '"</span> << filename << <span class="Constant">"' must begin with a '['</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>*filename<span class="Delimiter">.</span>rbegin<span class="Delimiter">()</span> != <span class="Constant">']'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << caller << <span class="Constant">": assume-filesystem: filename '"</span> << filename << <span class="Constant">"' must end with a ']'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
filename<span class="Delimiter">.</span>erase<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span>
filename<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>filename<span class="Delimiter">)</span>-<span class="Constant">1</span><span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << caller << <span class="Constant">": assume-filesystem: no data for filename '"</span> << filename << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
string arrow = next_filesystem_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>arrow != <span class="Constant">"<-"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << caller << <span class="Constant">": assume-filesystem: expected '<-' after filename '"</span> << filename << <span class="Constant">"' but got '"</span> << arrow << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << caller << <span class="Constant">": assume-filesystem: no data for filename '"</span> << filename << <span class="Constant">"' after '<-'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
string contents = next_filesystem_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>*contents<span class="Delimiter">.</span>begin<span class="Delimiter">()</span> != <span class="Constant">'['</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << caller << <span class="Constant">": assume-filesystem: file contents '"</span> << contents << <span class="Constant">"' for filename '"</span> << filename << <span class="Constant">"' must begin with a '['</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>*contents<span class="Delimiter">.</span>rbegin<span class="Delimiter">()</span> != <span class="Constant">']'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << caller << <span class="Constant">": assume-filesystem: file contents '"</span> << contents << <span class="Constant">"' for filename '"</span> << filename << <span class="Constant">"' must end with a ']'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
contents<span class="Delimiter">.</span>erase<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span>
contents<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>contents<span class="Delimiter">)</span>-<span class="Constant">1</span><span class="Delimiter">);</span>
put<span class="Delimiter">(</span>out<span class="Delimiter">,</span> filename<span class="Delimiter">,</span> munge_filesystem_contents<span class="Delimiter">(</span>contents<span class="Delimiter">,</span> filename<span class="Delimiter">,</span> caller<span class="Delimiter">));</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
string munge_filesystem_contents<span class="Delimiter">(</span><span class="Normal">const</span> string& data<span class="Delimiter">,</span> <span class="Normal">const</span> string& filename<span class="Delimiter">,</span> <span class="Normal">const</span> string& caller<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>data<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">""</span><span class="Delimiter">;</span>
istringstream in<span class="Delimiter">(</span>data<span class="Delimiter">);</span>
in >> std::noskipws<span class="Delimiter">;</span>
skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
ostringstream out<span class="Delimiter">;</span>
<span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
skip_whitespace<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="Constant">'|'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << caller << <span class="Constant">": assume-filesystem: file contents for filename '"</span> << filename << <span class="Constant">"' must be delimited in '|'s</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
in<span class="Delimiter">.</span>get<span class="Delimiter">();</span> <span class="Comment">// skip leading '|'</span>
string line<span class="Delimiter">;</span>
getline<span class="Delimiter">(</span>in<span class="Delimiter">,</span> line<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 < SIZE<span class="Delimiter">(</span>line<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>line<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == <span class="Constant">'|'</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>line<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == <span class="cSpecial">'\\'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
++i<span class="Delimiter">;</span> <span class="Comment">// skip</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>i == SIZE<span class="Delimiter">(</span>line<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise << caller << <span class="Constant">": assume-filesystem: file contents can't end a line with '</span><span class="cSpecial">\\</span><span class="Constant">'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
out << line<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Comment">// todo: some way to represent a file without a final newline</span>
out << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Normal">void</span> construct_filesystem_object<span class="Delimiter">(</span><span class="Normal">const</span> map<string<span class="Delimiter">,</span> string>& contents<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">int</span> filesystem_data_address = allocate<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>contents<span class="Delimiter">)</span>*<span class="Constant">2</span> + <span class="Comment">/*</span><span class="Comment">array length</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span class="Normal">int</span> curr = filesystem_data_address + <span class="Comment">/*</span><span class="Comment">skip refcount and length</span><span class="Comment">*/</span><span class="Constant">2</span><span class="Delimiter">;</span>
<span class="Normal">for</span> <span class="Delimiter">(</span>map<string<span class="Delimiter">,</span> string>::const_iterator p = contents<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != contents<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> new_mu_string<span class="Delimiter">(</span>p<span class="Delimiter">-></span>first<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">"storing file name "</span> << get<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">)</span> << <span class="Constant">" in location "</span> << curr << end<span class="Delimiter">();</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">),</span> <span class="Constant">1</span><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">"storing refcount 1 in location "</span> << get<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">)</span> << end<span class="Delimiter">();</span>
++curr<span class="Delimiter">;</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> new_mu_string<span class="Delimiter">(</span>p<span class="Delimiter">-></span>second<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">"storing file contents "</span> << get<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">)</span> << <span class="Constant">" in location "</span> << curr << end<span class="Delimiter">();</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">),</span> <span class="Constant">1</span><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">"storing refcount 1 in location "</span> << get<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">)</span> << end<span class="Delimiter">();</span>
++curr<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
curr = filesystem_data_address+<span class="Comment">/*</span><span class="Comment">skip refcount</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> SIZE<span class="Delimiter">(</span>contents<span class="Delimiter">));</span> <span class="Comment">// size of array</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">"storing filesystem size "</span> << get<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">)</span> << <span class="Constant">" in location "</span> << curr << end<span class="Delimiter">();</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> filesystem_data_address<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span> <span class="Comment">// initialize refcount</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">"storing refcount 1 in location "</span> << filesystem_data_address << end<span class="Delimiter">();</span>
<span class="Comment">// wrap the filesystem data in a filesystem object</span>
<span class="Normal">int</span> filesystem_address = allocate<span class="Delimiter">(</span>size_of_filesystem<span class="Delimiter">());</span>
curr = filesystem_address+<span class="Comment">/*</span><span class="Comment">skip refcount</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> filesystem_data_address<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">"storing filesystem data address "</span> << filesystem_data_address << <span class="Constant">" in location "</span> << curr << end<span class="Delimiter">();</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> filesystem_address<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span> <span class="Comment">// initialize refcount</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">"storing refcount 1 in location "</span> << filesystem_address << end<span class="Delimiter">();</span>
<span class="Comment">// save in product</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> FILESYSTEM<span class="Delimiter">,</span> filesystem_address<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">"storing filesystem address "</span> << filesystem_address << <span class="Constant">" in location "</span> << FILESYSTEM << end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Normal">int</span> size_of_filesystem<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span class="Comment">// memoize result if already computed</span>
<span class="Normal">static</span> <span class="Normal">int</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>result<span class="Delimiter">)</span> <span class="Identifier">return</span> result<span class="Delimiter">;</span>
assert<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"filesystem"</span><span class="Delimiter">));</span>
type_tree* type = <span class="Normal">new</span> type_tree<span class="Delimiter">(</span><span class="Constant">"filesystem"</span><span class="Delimiter">);</span>
result = size_of<span class="Delimiter">(</span>type<span class="Delimiter">)</span>+<span class="Comment">/*</span><span class="Comment">refcount</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Normal">delete</span> type<span class="Delimiter">;</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
string next_filesystem_word<span class="Delimiter">(</span>istream& in<span class="Delimiter">)</span> <span class="Delimiter">{</span>
skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> == <span class="Constant">'['</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
string result = slurp_quoted<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
skip_whitespace_and_comments_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
ostringstream out<span class="Delimiter">;</span>
slurp_word<span class="Delimiter">(</span>in<span class="Delimiter">,</span> out<span class="Delimiter">);</span>
skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
<span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Normal">void</span> skip_whitespace<span class="Delimiter">(</span>istream& in<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>isspace<span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()))</span> in<span class="Delimiter">.</span>get<span class="Delimiter">();</span>
<span class="Normal">else</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
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