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<span class="Comment">//: Clean syntax to manipulate and check the screen in scenarios.</span>
<span class="Comment">//: Instructions 'assume-screen' and 'screen-should-contain' implicitly create</span>
<span class="Comment">//: a variable called 'screen' that is accessible inside other 'run'</span>
<span class="Comment">//: instructions in the scenario.</span>
<span class="Delimiter">:(scenarios run_mu_scenario)</span>
<span class="Delimiter">:(scenario screen_in_scenario)</span>
scenario screen-in-scenario [
<span class="CommentedCode">#? $start-tracing</span>
assume-screen <span class="Constant">5</span>:literal/width<span class="Delimiter">,</span> <span class="Constant">3</span>:literal/height
run [
screen:address<span class="Special"> <- </span>print-character screen:address<span class="Delimiter">,</span> <span class="Constant">97</span>:literal <span class="Comment"># 'a'</span>
]
screen-should-contain [
<span class="Comment"># 01234</span>
<span class="Delimiter">.</span>a <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
]
<span class="CommentedCode">#? $exit</span>
]
<span class="Delimiter">:(scenario screen_in_scenario_unicode)</span>
<span class="Comment"># screen-should-contain can check unicode characters in the fake screen</span>
scenario screen-in-scenario [
assume-screen <span class="Constant">5</span>:literal/width<span class="Delimiter">,</span> <span class="Constant">3</span>:literal/height
run [
screen:address<span class="Special"> <- </span>print-character screen:address<span class="Delimiter">,</span> <span class="Constant">955</span>:literal <span class="Comment"># 'λ'</span>
]
screen-should-contain [
<span class="Comment"># 01234</span>
<span class="Delimiter">.</span>λ <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
]
<span class="CommentedCode">#? $exit</span>
]
<span class="Delimiter">:(scenario screen_in_scenario_error)</span>
<span class="CommentedCode">#? % cerr << "AAA\n";</span>
<span class="Special">% Hide_warnings = true;</span>
scenario screen-in-scenario-error [
assume-screen <span class="Constant">5</span>:literal/width<span class="Delimiter">,</span> <span class="Constant">3</span>:literal/height
run [
screen:address<span class="Special"> <- </span>print-character screen:address<span class="Delimiter">,</span> <span class="Constant">97</span>:literal <span class="Comment"># 'a'</span>
]
screen-should-contain [
<span class="Comment"># 01234</span>
<span class="Delimiter">.</span>b <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
<span class="Delimiter">.</span> <span class="Delimiter">.</span>
]
]
<span class="traceContains">+warn: expected screen location (0, 0) to contain 98 ('b') instead of 97 ('a')</span>
<span class="Comment">//: allow naming just for 'screen'</span>
<span class="Delimiter">:(before "End is_special_name Cases")</span>
if <span class="Delimiter">(</span>s == <span class="Constant">"screen"</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Globals")</span>
<span class="Comment">// Scenarios may not define default-space, so they should fit within the</span>
<span class="Comment">// initial area of memory reserved for tests. We'll put the predefined</span>
<span class="Comment">// variables available to them at the end of that region.</span>
const long long int Max_variables_in_scenarios = Reserved_for_tests-<span class="Constant">100</span><span class="Delimiter">;</span>
long long int Next_predefined_global_for_scenarios = Max_variables_in_scenarios<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Setup")</span>
assert<span class="Delimiter">(</span>Next_predefined_global_for_scenarios < Reserved_for_tests<span class="Delimiter">);</span>
<span class="Delimiter">:(after "transform_all()" following "case RUN:")</span>
<span class="Comment">// There's a restriction on the number of variables 'run' can use, so that</span>
<span class="Comment">// it can avoid colliding with the dynamic allocator in case it doesn't</span>
<span class="Comment">// initialize a default-space.</span>
assert<span class="Delimiter">(</span>Name[tmp_recipe<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span>][<span class="Constant">""</span>] < Max_variables_in_scenarios<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Globals")</span>
<span class="Comment">// Scenario Globals.</span>
const long long int SCREEN = Next_predefined_global_for_scenarios++<span class="Delimiter">;</span>
<span class="Comment">// End Scenario Globals.</span>
<span class="Delimiter">:(before "End Predefined Scenario Locals In Run")</span>
Name[tmp_recipe<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span>][<span class="Constant">"screen"</span>] = SCREEN<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Rewrite Instruction(curr)")</span>
<span class="Comment">// rewrite `assume-screen width, height` to</span>
<span class="Comment">// `screen:address <- init-fake-screen width, height`</span>
<span class="CommentedCode">//? cout << "before: " << curr.to_string() << '\n'; //? 1</span>
if <span class="Delimiter">(</span>curr<span class="Delimiter">.</span>name == <span class="Constant">"assume-screen"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
curr<span class="Delimiter">.</span>operation = Recipe_number[<span class="Constant">"init-fake-screen"</span>]<span class="Delimiter">;</span>
assert<span class="Delimiter">(</span>curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">"screen:address"</span><span class="Delimiter">));</span>
curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>set_value<span class="Delimiter">(</span>SCREEN<span class="Delimiter">);</span>
<span class="CommentedCode">//? cout << "after: " << curr.to_string() << '\n'; //? 1</span>
<span class="CommentedCode">//? cout << "AAA " << Recipe_number["init-fake-screen"] << '\n'; //? 1</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>
SCREEN_SHOULD_CONTAIN<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
Recipe_number[<span class="Constant">"screen-should-contain"</span>] = SCREEN_SHOULD_CONTAIN<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
case SCREEN_SHOULD_CONTAIN: <span class="Delimiter">{</span>
<span class="CommentedCode">//? cout << "AAA\n"; //? 1</span>
check_screen<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">:(before "End Types")</span>
<span class="Comment">// scan an array of characters in a unicode-aware, bounds-checked manner</span>
struct raw_string_stream <span class="Delimiter">{</span>
long long int index<span class="Delimiter">;</span>
const long long int max<span class="Delimiter">;</span>
const char* buf<span class="Delimiter">;</span>
raw_string_stream<span class="Delimiter">(</span>const string&<span class="Delimiter">);</span>
uint32_t get<span class="Delimiter">();</span> <span class="Comment">// unicode codepoint</span>
uint32_t peek<span class="Delimiter">();</span> <span class="Comment">// unicode codepoint</span>
bool at_end<span class="Delimiter">()</span> const<span class="Delimiter">;</span>
void skip_whitespace_and_comments<span class="Delimiter">();</span>
<span class="Delimiter">};</span>
<span class="Delimiter">:(code)</span>
void check_screen<span class="Delimiter">(</span>const string& expected_contents<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="CommentedCode">//? cerr << "Checking screen\n"; //? 1</span>
assert<span class="Delimiter">(</span>!Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>front<span class="Delimiter">().</span>default_space<span class="Delimiter">);</span> <span class="Comment">// not supported</span>
long long int screen_location = Memory[SCREEN]<span class="Delimiter">;</span>
int data_offset = find_element_name<span class="Delimiter">(</span>Type_number[<span class="Constant">"screen"</span>]<span class="Delimiter">,</span> <span class="Constant">"data"</span><span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>data_offset >= <span class="Constant">0</span><span class="Delimiter">);</span>
long long int screen_data_location = screen_location+data_offset<span class="Delimiter">;</span> <span class="Comment">// type: address:array:character</span>
long long int screen_data_start = Memory[screen_data_location]<span class="Delimiter">;</span> <span class="Comment">// type: array:character</span>
int width_offset = find_element_name<span class="Delimiter">(</span>Type_number[<span class="Constant">"screen"</span>]<span class="Delimiter">,</span> <span class="Constant">"num-columns"</span><span class="Delimiter">);</span>
long long int screen_width = Memory[screen_location+width_offset]<span class="Delimiter">;</span>
int height_offset = find_element_name<span class="Delimiter">(</span>Type_number[<span class="Constant">"screen"</span>]<span class="Delimiter">,</span> <span class="Constant">"num-rows"</span><span class="Delimiter">);</span>
long long int screen_height = Memory[screen_location+height_offset]<span class="Delimiter">;</span>
raw_string_stream cursor<span class="Delimiter">(</span>expected_contents<span class="Delimiter">);</span>
<span class="Comment">// todo: too-long expected_contents should fail</span>
long long int addr = screen_data_start+<span class="Constant">1</span><span class="Delimiter">;</span> <span class="Comment">// skip length</span>
for <span class="Delimiter">(</span>long long int row = <span class="Constant">0</span><span class="Delimiter">;</span> row < screen_height<span class="Delimiter">;</span> ++row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
cursor<span class="Delimiter">.</span>skip_whitespace_and_comments<span class="Delimiter">();</span>
if <span class="Delimiter">(</span>cursor<span class="Delimiter">.</span>at_end<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
assert<span class="Delimiter">(</span>cursor<span class="Delimiter">.</span>get<span class="Delimiter">()</span> == <span class="Constant">'.'</span><span class="Delimiter">);</span>
for <span class="Delimiter">(</span>long long int column = <span class="Constant">0</span><span class="Delimiter">;</span> column < screen_width<span class="Delimiter">;</span> ++column<span class="Delimiter">,</span> ++addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
uint32_t curr = cursor<span class="Delimiter">.</span>get<span class="Delimiter">();</span>
if <span class="Delimiter">(</span>Memory[addr] == <span class="Constant">0</span> && isspace<span class="Delimiter">(</span>curr<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
if <span class="Delimiter">(</span>Memory[addr] != <span class="Constant">0</span> && Memory[addr] == curr<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Comment">// mismatch</span>
<span class="Comment">// can't print multi-byte unicode characters in warnings just yet. not very useful for debugging anyway.</span>
char expected_pretty[<span class="Constant">10</span>] = <span class="Delimiter">{</span><span class="Constant">0</span><span class="Delimiter">};</span>
if <span class="Delimiter">(</span>curr < <span class="Constant">256</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// " ('<curr>')"</span>
expected_pretty[<span class="Constant">0</span>] = <span class="Constant">' '</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">1</span>] = <span class="Constant">'('</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">2</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">3</span>] = static_cast<unsigned char><span class="Delimiter">(</span>curr<span class="Delimiter">),</span> expected_pretty[<span class="Constant">4</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">5</span>] = <span class="Constant">')'</span><span class="Delimiter">,</span> expected_pretty[<span class="Constant">6</span>] = <span class="cSpecial">'\0'</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
char actual_pretty[<span class="Constant">10</span>] = <span class="Delimiter">{</span><span class="Constant">0</span><span class="Delimiter">};</span>
if <span class="Delimiter">(</span>Memory[addr] < <span class="Constant">256</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// " ('<curr>')"</span>
actual_pretty[<span class="Constant">0</span>] = <span class="Constant">' '</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">1</span>] = <span class="Constant">'('</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">2</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">3</span>] = static_cast<unsigned char><span class="Delimiter">(</span>Memory[addr]<span class="Delimiter">),</span> actual_pretty[<span class="Constant">4</span>] = <span class="cSpecial">'\''</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">5</span>] = <span class="Constant">')'</span><span class="Delimiter">,</span> actual_pretty[<span class="Constant">6</span>] = <span class="cSpecial">'\0'</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
if <span class="Delimiter">(</span>Current_scenario && !Hide_warnings<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// genuine test in a mu file</span>
raise << <span class="Constant">"</span><span class="cSpecial">\n</span><span class="Constant">F - "</span> << Current_scenario<span class="Delimiter">-></span>name << <span class="Constant">": expected screen location ("</span> << row << <span class="Constant">", "</span> << column << <span class="Constant">") to contain "</span> << curr << expected_pretty << <span class="Constant">" instead of "</span> << Memory[addr] << actual_pretty << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span><span class="Delimiter">;</span>
dump_screen<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
else <span class="Delimiter">{</span>
<span class="Comment">// just testing check_screen</span>
raise << <span class="Constant">"expected screen location ("</span> << row << <span class="Constant">", "</span> << column << <span class="Constant">") to contain "</span> << curr << expected_pretty << <span class="Constant">" instead of "</span> << Memory[addr] << actual_pretty << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
if <span class="Delimiter">(</span>!Hide_warnings<span class="Delimiter">)</span> <span class="Delimiter">{</span>
Passed = <span class="Constant">false</span><span class="Delimiter">;</span>
++Num_failures<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">return</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
assert<span class="Delimiter">(</span>cursor<span class="Delimiter">.</span>get<span class="Delimiter">()</span> == <span class="Constant">'.'</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>
cursor<span class="Delimiter">.</span>skip_whitespace_and_comments<span class="Delimiter">();</span>
assert<span class="Delimiter">(</span>cursor<span class="Delimiter">.</span>at_end<span class="Delimiter">());</span>
<span class="Delimiter">}</span>
raw_string_stream::raw_string_stream<span class="Delimiter">(</span>const string& backing<span class="Delimiter">)</span> :index<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">),</span> max<span class="Delimiter">(</span>backing<span class="Delimiter">.</span>size<span class="Delimiter">()),</span> buf<span class="Delimiter">(</span>backing<span class="Delimiter">.</span>c_str<span class="Delimiter">())</span> <span class="Delimiter">{}</span>
bool raw_string_stream::at_end<span class="Delimiter">()</span> const <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>index >= max<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
if <span class="Delimiter">(</span>tb_utf8_char_length<span class="Delimiter">(</span>buf[index]<span class="Delimiter">)</span> > max-index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << <span class="Constant">"unicode string seems corrupted at index "</span><< index << <span class="Constant">" character "</span> << static_cast<int><span class="Delimiter">(</span>buf[index]<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
uint32_t raw_string_stream::get<span class="Delimiter">()</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>index < max<span class="Delimiter">);</span> <span class="Comment">// caller must check bounds before calling 'get'</span>
uint32_t result = <span class="Constant">0</span><span class="Delimiter">;</span>
int length = tb_utf8_char_to_unicode<span class="Delimiter">(</span>&result<span class="Delimiter">,</span> &buf[index]<span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>length != TB_EOF<span class="Delimiter">);</span>
index += length<span class="Delimiter">;</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
uint32_t raw_string_stream::peek<span class="Delimiter">()</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>index < max<span class="Delimiter">);</span> <span class="Comment">// caller must check bounds before calling 'get'</span>
uint32_t result = <span class="Constant">0</span><span class="Delimiter">;</span>
int length = tb_utf8_char_to_unicode<span class="Delimiter">(</span>&result<span class="Delimiter">,</span> &buf[index]<span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>length != TB_EOF<span class="Delimiter">);</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
void raw_string_stream::skip_whitespace_and_comments<span class="Delimiter">()</span> <span class="Delimiter">{</span>
while <span class="Delimiter">(</span>!at_end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>isspace<span class="Delimiter">(</span>peek<span class="Delimiter">()))</span> get<span class="Delimiter">();</span>
else if <span class="Delimiter">(</span>peek<span class="Delimiter">()</span> == <span class="Constant">'#'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// skip comment</span>
get<span class="Delimiter">();</span>
while <span class="Delimiter">(</span>peek<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> get<span class="Delimiter">();</span> <span class="Comment">// implicitly also handles CRLF</span>
<span class="Delimiter">}</span>
else <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
_DUMP_SCREEN<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
Recipe_number[<span class="Constant">"$dump-screen"</span>] = _DUMP_SCREEN<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
case _DUMP_SCREEN: <span class="Delimiter">{</span>
dump_screen<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
void dump_screen<span class="Delimiter">()</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>!Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>front<span class="Delimiter">().</span>default_space<span class="Delimiter">);</span> <span class="Comment">// not supported</span>
long long int screen_location = Memory[SCREEN]<span class="Delimiter">;</span>
int width_offset = find_element_name<span class="Delimiter">(</span>Type_number[<span class="Constant">"screen"</span>]<span class="Delimiter">,</span> <span class="Constant">"num-columns"</span><span class="Delimiter">);</span>
long long int screen_width = Memory[screen_location+width_offset]<span class="Delimiter">;</span>
int height_offset = find_element_name<span class="Delimiter">(</span>Type_number[<span class="Constant">"screen"</span>]<span class="Delimiter">,</span> <span class="Constant">"num-rows"</span><span class="Delimiter">);</span>
long long int screen_height = Memory[screen_location+height_offset]<span class="Delimiter">;</span>
int data_offset = find_element_name<span class="Delimiter">(</span>Type_number[<span class="Constant">"screen"</span>]<span class="Delimiter">,</span> <span class="Constant">"data"</span><span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>data_offset >= <span class="Constant">0</span><span class="Delimiter">);</span>
long long int screen_data_location = screen_location+data_offset<span class="Delimiter">;</span> <span class="Comment">// type: address:array:character</span>
long long int screen_data_start = Memory[screen_data_location]<span class="Delimiter">;</span> <span class="Comment">// type: array:character</span>
<span class="CommentedCode">//? cerr << "data start: " << screen_data_start << '\n'; //? 1</span>
assert<span class="Delimiter">(</span>Memory[screen_data_start] == screen_width*screen_height<span class="Delimiter">);</span>
long long int curr = screen_data_start+<span class="Constant">1</span><span class="Delimiter">;</span> <span class="Comment">// skip length</span>
for <span class="Delimiter">(</span>long long int row = <span class="Constant">0</span><span class="Delimiter">;</span> row < screen_height<span class="Delimiter">;</span> ++row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="CommentedCode">//? cerr << curr << ":\n"; //? 1</span>
for <span class="Delimiter">(</span>long long int col = <span class="Constant">0</span><span class="Delimiter">;</span> col < screen_width<span class="Delimiter">;</span> ++col<span class="Delimiter">)</span> <span class="Delimiter">{</span>
cerr << static_cast<char><span class="Delimiter">(</span>Memory[curr]<span class="Delimiter">);</span>
++curr<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
cerr << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
</pre>
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