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<!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 - 082scenario_screen.cc</title> <meta name="Generator" content="Vim/7.4"> <meta name="plugin-version" content="vim7.4_v2"> <meta name="syntax" content="cpp"> <meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> <meta name="colorscheme" content="minimal"> <style type="text/css">  </style> <script type='text/javascript'>  </script> </head> <body onload='JumpToLine();'> <pre id='vimCodeElement'> 1 //: Clean syntax to manipulate and check the screen in scenarios. 2 //: Instructions 'assume-screen' and 'screen-should-contain' implicitly create 3 //: a variable called 'screen' that is accessible to later instructions in the 4 //: scenario. 'screen-should-contain' can check unicode characters in the fake 5 //: screen 6 7 //: first make sure we don't mangle these instructions in other transforms 8 :(before "End initialize_transform_rewrite_literal_string_to_text()") 9 recipes_taking_literal_strings.insert("screen-should-contain"); 10 recipes_taking_literal_strings.insert("screen-should-contain-in-color"); 11 12 :(scenarios run_mu_scenario) 13 :(scenario screen_in_scenario) 14 <a href='050scenario.cc.html#L57'>scenario</a> screen-in-scenario [ 15 local-scope 16 assume-screen 5/width, 3/height 17 run [ 18 ¦ a:char <- copy 97/a 19 ¦ screen:&:screen <- print screen:&:screen, a 20 ] 21 screen-should-contain [ 22 # 01234 23 ¦ .a . 24 ¦ . . 25 ¦ . . 26 ] 27 ] 28 # checks are inside scenario 29 30 :(scenario screen_in_scenario_unicode) 31 # screen-should-contain can check unicode characters in the fake screen 32 <a href='050scenario.cc.html#L57'>scenario</a> screen-in-scenario-unicode [ 33 local-scope 34 assume-screen 5/width, 3/height 35 run [ 36 ¦ lambda:char <- copy 955/greek-small-lambda 37 ¦ screen:&:screen <- print screen:&:screen, lambda 38 ¦ a:char <- copy 97/a 39 ¦ screen:&:screen <- print screen:&:screen, a 40 ] 41 screen-should-contain [ 42 # 01234 43 ¦ .λa . 44 ¦ . . 45 ¦ . . 46 ] 47 ] 48 # checks are inside scenario 49 50 :(scenario screen_in_scenario_color) 51 <a href='050scenario.cc.html#L57'>scenario</a> screen-in-scenario-color [ 52 local-scope 53 assume-screen 5/width, 3/height 54 run [ 55 ¦ lambda:char <- copy 955/greek-small-lambda 56 ¦ screen:&:screen <- print screen:&:screen, lambda, 1/red 57 ¦ a:char <- copy 97/a 58 ¦ screen:&:screen <- print screen:&:screen, a, 7/white 59 ] 60 # screen-should-contain shows everything 61 screen-should-contain [ 62 # 01234 63 ¦ .λa . 64 ¦ . . 65 ¦ . . 66 ] 67 # screen-should-contain-in-color filters out everything except the given 68 # color, all you see is the 'a' in white. 69 screen-should-contain-in-color 7/white, [ 70 # 01234 71 ¦ . a . 72 ¦ . . 73 ¦ . . 74 ] 75 # ..and the λ in red. 76 screen-should-contain-in-color 1/red, [ 77 # 01234 78 ¦ .λ . 79 ¦ . . 80 ¦ . . 81 ] 82 ] 83 # checks are inside scenario 84 85 :(scenario screen_in_scenario_error) 86 % Scenario_testing_scenario = true; 87 % Hide_errors = true; 88 <a href='050scenario.cc.html#L57'>scenario</a> screen-in-scenario-error [ 89 local-scope 90 assume-screen 5/width, 3/height 91 run [ 92 ¦ a:char <- copy 97/a 93 ¦ screen:&:screen <- print screen:&:screen, a 94 ] 95 screen-should-contain [ 96 # 01234 97 ¦ .b . 98 ¦ . . 99 ¦ . . 100 ] 101 ] 102 +error: F - screen-in-scenario-error: expected screen location (0, 0) to contain 98 ('b') instead of 97 ('a') 103 104 :(scenario screen_in_scenario_color_error) 105 % Scenario_testing_scenario = true; 106 % Hide_errors = true; 107 # screen-should-contain can check unicode characters in the fake screen 108 <a href='050scenario.cc.html#L57'>scenario</a> screen-in-scenario-color-error [ 109 local-scope 110 assume-screen 5/width, 3/height 111 run [ 112 ¦ a:char <- copy 97/a 113 ¦ screen:&:screen <- print screen:&:screen, a, 1/red 114 ] 115 screen-should-contain-in-color 2/green, [ 116 # 01234 117 ¦ .a . 118 ¦ . . 119 ¦ . . 120 ] 121 ] 122 +error: F - screen-in-scenario-color-error: expected screen location (0, 0) to contain 'a' in color 2 instead of 1 123 124 :(scenarios run) 125 :(scenario convert_names_does_not_fail_when_mixing_special_names_and_numeric_locations) 126 % Scenario_testing_scenario = true; 127 def <a href='000organization.cc.html#L113'>main</a> [ 128 screen:num <- copy 1:num 129 ] 130 -error: mixing variable names and numeric addresses in <a href='000organization.cc.html#L113'>main</a> 131 $error: 0 132 :(scenarios run_mu_scenario) 133 134 //: It's easier to implement assume-screen and other similar scenario-only 135 //: primitives if they always write to a fixed location. So we'll assign a 136 //: single fixed location for the per-scenario screen, keyboard, file system, 137 //: etc. Carve space for these fixed locations out of the reserved-for-test 138 //: locations. 139 140 :(before "End Globals") 141 extern const int Max_variables_in_scenarios = Reserved_for_tests-100; 142 int Next_predefined_global_for_scenarios = Max_variables_in_scenarios; 143 :(before "End Reset") 144 assert(Next_predefined_global_for_scenarios < Reserved_for_tests); 145 146 :(before "End Globals") 147 // Scenario Globals. 148 extern const int SCREEN = Next_predefined_global_for_scenarios++; 149 // End Scenario Globals. 150 151 //: give 'screen' a fixed location in scenarios 152 :(before "End Special Scenario Variable Names(r)") 153 Name[r]["screen"] = SCREEN; 154 //: make 'screen' always a raw location in scenarios 155 :(before "End <a href='042name.cc.html#L163'>is_special_name</a> Special-cases") 156 if (s == "screen") return true; 157 158 :(before "End Rewrite Instruction(curr, <a href='010vm.cc.html#L19'>recipe</a> result)") 159 // rewrite 'assume-screen width, height' to 160 // 'screen:&:screen <- new-fake-screen width, height' 161 if (curr.name == "assume-screen") { 162 curr.name = "new-fake-screen"; 163 if (!curr.products.empty()) { 164 ¦ <a href='003trace.cc.html#L168'>raise</a> << result.name << ": 'assume-screen' has no products\n" << <a href='003trace.cc.html#L197'>end</a>(); 165 } 166 else if (!starts_with(result.name, "scenario_")) { 167 ¦ <a href='003trace.cc.html#L168'>raise</a> << result.name << ": 'assume-screen' can't be called here, only in scenarios\n" << end(); 168 } 169 else { 170 ¦ assert(curr.products.empty()); 171 ¦ curr.products.push_back(reagent("screen:&:screen/raw")); 172 ¦ curr.products.at(0).<a href='010vm.cc.html#L65'>set_value</a>(SCREEN); 173 } 174 } 175 176 :(scenario assume_screen_shows_up_in_errors) 177 % Hide_errors = true; 178 <a href='050scenario.cc.html#L57'>scenario</a> assume-screen-shows-up-in-errors [ 179 assume-screen width, 5 180 ] 181 +error: assume-screen-shows-up-in-errors: missing type for 'width' in 'assume-screen width, 5' 182 183 //: screen-should-contain is a regular instruction 184 :(before "End Primitive Recipe Declarations") 185 SCREEN_SHOULD_CONTAIN, 186 :(before "End Primitive Recipe Numbers") 187 <a href='001help.cc.html#L221'>put</a>(Recipe_ordinal, "screen-should-contain", SCREEN_SHOULD_CONTAIN); 188 :(before "End Primitive Recipe Checks") 189 case SCREEN_SHOULD_CONTAIN: { 190 if (<a href='001help.cc.html#L141'>SIZE</a>(inst.ingredients) != 1) { 191 ¦ <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a>(get(Recipe, r).name) << "'screen-should-contain' requires exactly one ingredient, but got '" << to_original_string(inst) << "'\n" << <a href='003trace.cc.html#L197'>end</a>(); 192 ¦ break; 193 } 194 if (!is_literal_text(inst.ingredients.at(0))) { 195 ¦ <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a>(get(Recipe, r).name) << "first ingredient of 'screen-should-contain' should be a literal string, but got '" << inst.ingredients.at(0).original_string << "'\n" << <a href='003trace.cc.html#L197'>end</a>(); 196 ¦ break; 197 } 198 break; 199 } 200 :(before "End Primitive Recipe Implementations") 201 case SCREEN_SHOULD_CONTAIN: { 202 if (!Passed) break; 203 assert(scalar(ingredients.at(0))); 204 check_screen(<a href='026call.cc.html#L87'>current_instruction</a>().ingredients.at(0).name, -1); 205 break; 206 } 207 208 :(before "End Primitive Recipe Declarations") 209 SCREEN_SHOULD_CONTAIN_IN_COLOR, 210 :(before "End Primitive Recipe Numbers") 211 <a href='001help.cc.html#L221'>put</a>(Recipe_ordinal, "screen-should-contain-in-color", SCREEN_SHOULD_CONTAIN_IN_COLOR); 212 :(before "End Primitive Recipe Checks") 213 case SCREEN_SHOULD_CONTAIN_IN_COLOR: { 214 if (<a href='001help.cc.html#L141'>SIZE</a>(inst.ingredients) != 2) { 215 ¦ <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a>(get(Recipe, r).name) << "'screen-should-contain-in-color' requires exactly two ingredients, but got '" << to_original_string(inst) << "'\n" << <a href='003trace.cc.html#L197'>end</a>(); 216 ¦ break; 217 } 218 if (!is_mu_number(inst.ingredients.at(0))) { 219 ¦ <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a>(get(Recipe, r).name) << "first ingredient of 'screen-should-contain-in-color' should be a number (color code), but got '" << inst.ingredients.at(0).original_string << "'\n" << <a href='003trace.cc.html#L197'>end</a>(); 220 ¦ break; 221 } 222 if (!is_literal_text(inst.ingredients.at(1))) { 223 ¦ <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a>(get(Recipe, r).name) << "second ingredient of 'screen-should-contain-in-color' should be a literal string, but got '" << inst.ingredients.at(1).original_string << "'\n" << <a href='003trace.cc.html#L197'>end</a>(); 224 ¦ break; 225 } 226 break; 227 } 228 :(before "End Primitive Recipe Implementations") 229 case SCREEN_SHOULD_CONTAIN_IN_COLOR: { 230 if (!Passed) break; 231 assert(scalar(ingredients.at(0))); 232 assert(scalar(ingredients.at(1))); 233 check_screen(<a href='026call.cc.html#L87'>current_instruction</a>().ingredients.at(1).name, ingredients.at(0).at(0)); 234 break; 235 } 236 237 :(before "End Types") 238 // scan an array of characters in a unicode-aware, bounds-checked manner 239 struct raw_string_stream { 240 int index; 241 const int max; 242 const char* buf; 243 244 raw_string_stream(const string&); 245 uint32_t get(); // unicode codepoint 246 uint32_t peek(); // unicode codepoint 247 bool at_end() const; 248 void <a href='011load.cc.html#L209'>skip_whitespace_and_comments</a>(); 249 }; 250 251 :(code) 252 void check_screen(const string& expected_contents, const int color) { 253 int screen_location = <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, SCREEN)+/*skip refcount*/1; 254 int data_offset = <a href='042name.cc.html#L140'>find_element_name</a>(get(Type_ordinal, "screen"), "data", ""); 255 assert(data_offset >= 0); 256 int screen_data_location = screen_location+data_offset; // type: address:array:character 257 int screen_data_start = <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, screen_data_location) + /*skip refcount*/1; // type: array:character 258 int width_offset = <a href='042name.cc.html#L140'>find_element_name</a>(get(Type_ordinal, "screen"), "num-columns", ""); 259 int screen_width = <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, screen_location+width_offset); 260 int height_offset = <a href='042name.cc.html#L140'>find_element_name</a>(get(Type_ordinal, "screen"), "num-rows", ""); 261 int screen_height = <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, screen_location+height_offset); 262 raw_string_stream cursor(expected_contents); 263 // todo: too-long expected_contents should fail 264 int top_index_offset = <a href='042name.cc.html#L140'>find_element_name</a>(get(Type_ordinal, "screen"), "top-idx", ""); 265 int top_index = <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, screen_location+top_index_offset); 266 for (int i=0, row=top_index/screen_width; i < screen_height; ++i, row=(row+1)%screen_height) { 267 ¦ cursor.<a href='011load.cc.html#L209'>skip_whitespace_and_comments</a>(); 268 ¦ if (cursor.at_end()) break; 269 ¦ if (cursor.get() != '.') { 270 ¦ ¦ <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a>(<a href='026call.cc.html#L85'>current_recipe_name</a>()) << "each row of the expected screen should start with a '.'\n" << <a href='003trace.cc.html#L197'>end</a>(); 271 ¦ ¦ if (!Scenario_testing_scenario) Passed = false; 272 ¦ ¦ return; 273 ¦ } 274 ¦ int addr = screen_data_start+/*length*/1+row*screen_width* /*size of screen-cell*/2; 275 ¦ for (int column = 0; column < screen_width; ++column, addr+= /*size of screen-cell*/2) { 276 ¦ ¦ const int cell_color_offset = 1; 277 ¦ ¦ uint32_t curr = cursor.get(); 278 ¦ ¦ if (<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr) == 0 && isspace(curr)) continue; 279 ¦ ¦ if (curr == ' ' && color != -1 && color != <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr+cell_color_offset)) { 280 ¦ ¦ ¦ // filter out other colors 281 ¦ ¦ ¦ continue; 282 ¦ ¦ } 283 ¦ ¦ if (<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr) != 0 && <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr) == curr) { 284 ¦ ¦ ¦ if (color == -1 || color == <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr+cell_color_offset)) continue; 285 ¦ ¦ ¦ // contents match but color is off 286 ¦ ¦ ¦ if (!Hide_errors) cerr << '\n'; 287 ¦ ¦ ¦ <a href='003trace.cc.html#L168'>raise</a> << "F - " << <a href='013update_operation.cc.html#L25'>maybe</a>(<a href='026call.cc.html#L85'>current_recipe_name</a>()) << "expected screen location (" << row << ", " << column << ") to contain '" << unicode_character_at(addr) << "' in color " << color << " instead of " << no_scientific(<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr+cell_color_offset)) << "\n" << <a href='003trace.cc.html#L197'>end</a>(); 288 ¦ ¦ ¦ if (!Hide_errors) dump_screen(); 289 ¦ ¦ ¦ if (!Scenario_testing_scenario) Passed = false; 290 ¦ ¦ ¦ return; 291 ¦ ¦ } 292 293 ¦ ¦ // really a mismatch 294 ¦ ¦ // can't print multi-byte unicode characters in errors just yet. not very useful for debugging anyway. 295 ¦ ¦ char expected_pretty[10] = {0}; 296 ¦ ¦ if (curr < 256 && !iscntrl(curr)) { 297 ¦ ¦ ¦ // " ('<curr>')" 298 ¦ ¦ ¦ expected_pretty[0] = ' ', expected_pretty[1] = '(', expected_pretty[2] = '\'', expected_pretty[3] = static_cast<unsigned char>(curr), expected_pretty[4] = '\'', expected_pretty[5] = ')', expected_pretty[6] = '\0'; 299 ¦ ¦ } 300 ¦ ¦ char actual_pretty[10] = {0}; 301 ¦ ¦ if (<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr) < 256 && !iscntrl(<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr))) { 302 ¦ ¦ ¦ // " ('<curr>')" 303 ¦ ¦ ¦ actual_pretty[0] = ' ', actual_pretty[1] = '(', actual_pretty[2] = '\'', actual_pretty[3] = static_cast<unsigned char>(<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr)), actual_pretty[4] = '\'', actual_pretty[5] = ')', actual_pretty[6] = '\0'; 304 ¦ ¦ } 305 306 ¦ ¦ ostringstream color_phrase; 307 ¦ ¦ if (color != -1) color_phrase << " in color " << color; 308 ¦ ¦ if (!Hide_errors) cerr << '\n'; 309 ¦ ¦ <a href='003trace.cc.html#L168'>raise</a> << "F - " << <a href='013update_operation.cc.html#L25'>maybe</a>(<a href='026call.cc.html#L85'>current_recipe_name</a>()) << "expected screen location (" << row << ", " << column << ") to contain " << curr << expected_pretty << color_phrase.str() << " instead of " << no_scientific(<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr)) << actual_pretty << '\n' << <a href='003trace.cc.html#L197'>end</a>(); 310 ¦ ¦ if (!Hide_errors) dump_screen(); 311 ¦ ¦ if (!Scenario_testing_scenario) Passed = false; 312 ¦ ¦ return; 313 ¦ } 314 ¦ if (cursor.get() != '.') { 315 ¦ ¦ <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a>(<a href='026call.cc.html#L85'>current_recipe_name</a>()) << "row " << row << " of the expected screen is too long\n" << <a href='003trace.cc.html#L197'>end</a>(); 316 ¦ ¦ if (!Scenario_testing_scenario) Passed = false; 317 ¦ ¦ return; 318 ¦ } 319 } 320 cursor.<a href='011load.cc.html#L209'>skip_whitespace_and_comments</a>(); 321 if (!cursor.at_end()) { 322 ¦ <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a>(<a href='026call.cc.html#L85'>current_recipe_name</a>()) << "expected screen has too many rows\n" << <a href='003trace.cc.html#L197'>end</a>(); 323 ¦ Passed = false; 324 } 325 } 326 327 const char* unicode_character_at(int addr) { 328 int unicode_code_point = static_cast<int>(<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, addr)); 329 return to_unicode(unicode_code_point); 330 } 331 332 raw_string_stream::raw_string_stream(const string& backing) :index(0), max(<a href='001help.cc.html#L141'>SIZE</a>(backing)), buf(backing.c_str()) {} 333 334 bool raw_string_stream::at_end() const { 335 if (index >= max) return true; 336 if (tb_utf8_char_length(buf[index]) > max-index) { 337 ¦ <a href='003trace.cc.html#L168'>raise</a> << "unicode string seems corrupted at index "<< index << " character " << static_cast<int>(buf[index]) << '\n' << <a href='003trace.cc.html#L197'>end</a>(); 338 ¦ return true; 339 } 340 return false; 341 } 342 343 uint32_t raw_string_stream::get() { 344 assert(index < max); // caller must check bounds before calling 'get' 345 uint32_t result = 0; 346 int length = tb_utf8_char_to_unicode(&result, &buf[index]); 347 assert(length != TB_EOF); 348 index += length; 349 return result; 350 } 351 352 uint32_t raw_string_stream::peek() { 353 assert(index < max); // caller must check bounds before calling 'get' 354 uint32_t result = 0; 355 int length = tb_utf8_char_to_unicode(&result, &buf[index]); 356 assert(length != TB_EOF); 357 return result; 358 } 359 360 void raw_string_stream::<a href='011load.cc.html#L209'>skip_whitespace_and_comments</a>() { 361 while (!at_end()) { 362 ¦ if (isspace(peek())) get(); 363 ¦ else if (peek() == '#') { 364 ¦ ¦ // skip comment 365 ¦ ¦ get(); 366 ¦ ¦ while (peek() != '\n') get(); // implicitly also handles CRLF 367 ¦ } 368 ¦ else break; 369 } 370 } 371 372 :(before "End Primitive Recipe Declarations") 373 _DUMP_SCREEN, 374 :(before "End Primitive Recipe Numbers") 375 <a href='001help.cc.html#L221'>put</a>(Recipe_ordinal, "$dump-screen", _DUMP_SCREEN); 376 :(before "End Primitive Recipe Checks") 377 case _DUMP_SCREEN: { 378 break; 379 } 380 :(before "End Primitive Recipe Implementations") 381 case _DUMP_SCREEN: { 382 dump_screen(); 383 break; 384 } 385 386 :(code) 387 void dump_screen() { 388 int screen_location = <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, SCREEN) + /*skip refcount*/1; 389 int width_offset = <a href='042name.cc.html#L140'>find_element_name</a>(get(Type_ordinal, "screen"), "num-columns", ""); 390 int screen_width = <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, screen_location+width_offset); 391 int height_offset = <a href='042name.cc.html#L140'>find_element_name</a>(get(Type_ordinal, "screen"), "num-rows", ""); 392 int screen_height = <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, screen_location+height_offset); 393 int data_offset = <a href='042name.cc.html#L140'>find_element_name</a>(get(Type_ordinal, "screen"), "data", ""); 394 assert(data_offset >= 0); 395 int screen_data_location = screen_location+data_offset; // type: address:array:character 396 int screen_data_start = <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, screen_data_location) + /*skip refcount*/1; // type: array:character 397 assert(<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, screen_data_start) == screen_width*screen_height); 398 int top_index_offset = <a href='042name.cc.html#L140'>find_element_name</a>(get(Type_ordinal, "screen"), "top-idx", ""); 399 int top_index = <a href='001help.cc.html#L229'>get_or_insert</a>(Memory, screen_location+top_index_offset); 400 for (int i=0, row=top_index/screen_width; i < screen_height; ++i, row=(row+1)%screen_height) { 401 ¦ cerr << '.'; 402 ¦ int curr = screen_data_start+/*length*/1+row*screen_width* /*size of screen-cell*/2; 403 ¦ for (int col = 0; col < screen_width; ++col) { 404 ¦ ¦ if (<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, curr)) 405 ¦ ¦ ¦ cerr << to_unicode(static_cast<uint32_t>(<a href='001help.cc.html#L229'>get_or_insert</a>(Memory, curr))); 406 ¦ ¦ else 407 ¦ ¦ ¦ cerr << ' '; 408 ¦ ¦ curr += /*size of screen-cell*/2; 409 ¦ } 410 ¦ cerr << ".\n"; 411 } 412 } </pre> </body> </html>


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