about summary refs log tree commit diff stats
path: root/030container.cc
blob: 8505f475932679d19fa7cfe0963172f8db178f4b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
//: Containers contain a fixed number of elements of different types.

:(before "End Mu Types Initialization")
//: We'll use this container as a running example, with two number elements.
type_ordinal point = Type_ordinal["point"] = Next_type_ordinal++;
Type[point].size = 2;
Type[point].kind = container;
Type[point].name = "point";
vector<type_ordinal> i;
i.push_back(number);
Type[point].elements.push_back(i);
Type[point].elements.push_back(i);

//: Containers can be copied around with a single instruction just like
//: numbers, no matter how large they are.

//: Tests in this layer often explicitly setup memory before reading it as a
//: container. Don't do this in general. I'm tagging exceptions with /raw to
//: avoid warnings.
:(scenario copy_multiple_locations)
recipe main [
  1:number <- copy 34
  2:number <- copy 35
  3:point <- copy 1:point/raw  # unsafe
]
+mem: storing 34 in location 3
+mem: storing 35 in location 4

//: trying to copy to a differently-sized destination will fail
:(scenario copy_checks_size)
% Hide_warnings = true;
recipe main [
  2:point <- copy 1:number
]
+warn: main: size mismatch in storing to 2:point (2 vs 1) at '2:point <- copy 1:number'

:(before "End Mu Types Initialization")
// A more complex container, containing another container as one of its
// elements.
type_ordinal point_number = Type_ordinal["point-number"] = Next_type_ordinal++;
Type[point_number].size = 2;
Type[point_number].kind = container;
Type[point_number].name = "point-number";
vector<type_ordinal> p2;
p2.push_back(point);
Type[point_number].elements.push_back(p2);
vector<type_ordinal> i2;
i2.push_back(number);
Type[point_number].elements.push_back(i2);

:(scenario copy_handles_nested_container_elements)
recipe main [
  12:number <- copy 34
  13:number <- copy 35
  14:number <- copy 36
  15:point-number <- copy 12:point-number/raw  # unsafe
]
+mem: storing 36 in location 17

//: Containers can be checked for equality with a single instruction just like
//: numbers, no matter how large they are.

:(scenario compare_multiple_locations)
recipe main [
  1:number <- copy 34  # first
  2:number <- copy 35
  3:number <- copy 36
  4:number <- copy 34  # second
  5:number <- copy 35
  6:number <- copy 36
  7:boolean <- equal 1:point-number/raw, 4:point-number/raw  # unsafe
]
+mem: storing 1 in location 7

:(scenario compare_multiple_locations_2)
recipe main [
  1:number <- copy 34  # first
  2:number <- copy 35
  3:number <- copy 36
  4:number <- copy 34  # second
  5:number <- copy 35
  6:number <- copy 37  # different
  7:boolean <- equal 1:point-number/raw, 4:point-number/raw  # unsafe
]
+mem: storing 0 in location 7

:(before "End size_of(types) Cases")
type_info t = Type[types.at(0)];
if (t.kind == container) {
  // size of a container is the sum of the sizes of its elements
  long long int result = 0;
  for (long long int i = 0; i < SIZE(t.elements); ++i) {
    // todo: strengthen assertion to disallow mutual type recursion
    if (types.at(0) == t.elements.at(i).at(0)) {
      raise << "container " << t.name << " can't include itself as a member\n" << end();
      return 0;
    }
    result += size_of(t.elements.at(i));
  }
  return result;
}

:(scenario stash_container)
recipe main [
  1:number <- copy 34  # first
  2:number <- copy 35
  3:number <- copy 36
  stash [foo:], 1:point-number/raw
]
+app: foo: 34 35 36

//:: To access elements of a container, use 'get'
:(scenario get)
recipe main [
  12:number <- copy 34
  13:number <- copy 35
  15:number <- get 12:point/raw, 1:offset  # unsafe
]
+mem: storing 35 in location 15

:(before "End Primitive Recipe Declarations")
GET,
:(before "End Primitive Recipe Numbers")
Recipe_ordinal["get"] = GET;
:(before "End Primitive Recipe Implementations")
case GET: {
  if (SIZE(ingredients) != 2) {
    raise << current_recipe_name() << ": 'get' expects exactly 2 ingredients in '" << current_instruction().to_string() << "'\n" << end();
    break;
  }
  reagent base = current_instruction().ingredients.at(0);
  long long int base_address = base.value;
  if (base_address == 0) {
    raise << current_recipe_name() << ": tried to access location 0 in '" << current_instruction().to_string() << "'\n" << end();
    break;
  }
  if (base.types.empty() || Type[base.types.at(0)].kind != container) {
    raise << current_recipe_name () << ": first ingredient of 'get' should be a container, but got " << current_instruction().ingredients.at(0).original_string << '\n' << end();
    break;
  }
  type_ordinal base_type = base.types.at(0);
  if (!is_literal(current_instruction().ingredients.at(1))) {
    raise << current_recipe_name() << ": second ingredient of 'get' should have type 'offset', but got " << current_instruction().ingredients.at(1).original_string << '\n' << end();
    break;
  }
  assert(scalar(ingredients.at(1)));
  long long int offset = ingredients.at(1).at(0);
  long long int src = base_address;
  for (long long int i = 0; i < offset; ++i) {
    src += size_of(Type[base_type].elements.at(i));
  }
  trace(Primitive_recipe_depth, "run") << "address to copy is " << src << end();
  if (offset < 0 || offset >= SIZE(Type[base_type].elements)) {
    raise << current_recipe_name() << ": invalid offset " << offset << " for " << Type[base_type].name << '\n' << end();
    break;
  }
  type_ordinal src_type = Type[base_type].elements.at(offset).at(0);
  trace(Primitive_recipe_depth, "run") << "its type is " << Type[src_type].name << end();
  reagent tmp;
  tmp.set_value(src);
  tmp.types.push_back(src_type);
  products.push_back(read_memory(tmp));
  break;
}

:(scenario get_handles_nested_container_elements)
recipe main [
  12:number <- copy 34
  13:number <- copy 35
  14:number <- copy 36
  15:number <- get 12:point-number/raw, 1:offset  # unsafe
]
+mem: storing 36 in location 15

//:: To write to elements of containers, you need their address.

:(scenario get_address)
recipe main [
  12:number <- copy 34
  13:number <- copy 35
  15:address:number <- get-address 12:point/raw, 1:offset  # unsafe
]
+mem: storing 13 in location 15

:(scenario get_out_of_bounds)
% Hide_warnings = true;
recipe main [
  12:number <- copy 34
  13:number <- copy 35
  14:number <- copy 36
  get 12:point-number/raw, 2:offset  # point-number occupies 3 locations but has only 2 fields; out of bounds
]
+warn: main: invalid offset 2 for point-number

:(scenario get_out_of_bounds_2)
% Hide_warnings = true;
recipe main [
  12:number <- copy 34
  13:number <- copy 35
  14:number <- copy 36
  get 12:point-number/raw, -1:offset
]
+warn: main: invalid offset -1 for point-number

:(before "End Primitive Recipe Declarations")
GET_ADDRESS,
:(before "End Primitive Recipe Numbers")
Recipe_ordinal["get-address"] = GET_ADDRESS;
:(before "End Primitive Recipe Implementations")
case GET_ADDRESS: {
  reagent base = current_instruction().ingredients.at(0);
  long long int base_address = base.value;
  if (base_address == 0) {
    raise << current_recipe_name() << ": tried to access location 0 in '" << current_instruction().to_string() << "'\n" << end();
    break;
  }
  if (base.types.empty() || Type[base.types.at(0)].kind != container) {
    raise << current_recipe_name () << ": first ingredient of 'get-address' should be a container, but got " << current_instruction().ingredients.at(0).original_string << '\n' << end();
    break;
  }
  type_ordinal base_type = base.types.at(0);
  if (!is_literal(current_instruction().ingredients.at(1))) {
    raise << current_recipe_name() << ": second ingredient of 'get-address' should have type 'offset', but got " << current_instruction().ingredients.at(1).original_string << '\n' << end();
    break;
  }
  assert(scalar(ingredients.at(1)));
  long long int offset = ingredients.at(1).at(0);
  if (offset < 0 || offset >= SIZE(Type[base_type].elements)) {
    raise << "invalid offset " << offset << " for " << Type[base_type].name << '\n' << end();
    break;
  }
  long long int result = base_address;
  for (long long int i = 0; i < offset; ++i) {
    result += size_of(Type[base_type].elements.at(i));
  }
  trace(Primitive_recipe_depth, "run") << "address to copy is " << result << end();
  products.resize(1);
  products.at(0).push_back(result);
  break;
}

:(scenario get_address_out_of_bounds)
% Hide_warnings = true;
recipe main [
  12:number <- copy 34
  13:number <- copy 35
  14:number <- copy 36
  get-address 12:point-number/raw, 2:offset  # point-number occupies 3 locations but has only 2 fields; out of bounds
]
+warn: invalid offset 2 for point-number

:(scenario get_address_out_of_bounds_2)
% Hide_warnings = true;
recipe main [
  12:number <- copy 34
  13:number <- copy 35
  14:number <- copy 36
  get-address 12:point-number/raw, -1:offset
]
+warn: invalid offset -1 for point-number

//:: Allow containers to be defined in mu code.

:(scenarios load)
:(scenario container)
container foo [
  x:number
  y:number
]
+parse: reading container foo
+parse:   element name: x
+parse:   type: 1
+parse:   element name: y
+parse:   type: 1

:(scenario container_use_before_definition)
container foo [
  x:number
  y:bar
]

container bar [
  x:number
  y:number
]
+parse: reading container foo
+parse: type number: 1000
+parse:   element name: x
+parse:   type: 1
+parse:   element name: y
+parse:   type: 1001
+parse: reading container bar
+parse: type number: 1001

:(before "End Command Handlers")
else if (command == "container") {
  insert_container(command, container, in);
}

:(code)
void insert_container(const string& command, kind_of_type kind, istream& in) {
  skip_whitespace(in);
  string name = next_word(in);
  trace("parse") << "reading " << command << ' ' << name << end();
  if (Type_ordinal.find(name) == Type_ordinal.end()
      || Type_ordinal[name] == 0) {
    Type_ordinal[name] = Next_type_ordinal++;
  }
  trace("parse") << "type number: " << Type_ordinal[name] << end();
  skip_bracket(in, "'container' must begin with '['");
  type_info& t = Type[Type_ordinal[name]];
  recently_added_types.push_back(Type_ordinal[name]);
  t.name = name;
  t.kind = kind;
  while (!in.eof()) {
    skip_whitespace_and_comments(in);
    string element = next_word(in);
    if (element == "]") break;
    istringstream inner(element);
    t.element_names.push_back(slurp_until(inner, ':'));
    trace("parse") << "  element name: " << t.element_names.back() << end();
    vector<type_ordinal> types;
    while (!inner.eof()) {
      string type_name = slurp_until(inner, ':');
      if (Type_ordinal.find(type_name) == Type_ordinal.end()
          // types can contain integers, like for array sizes
          && !is_integer(type_name)) {
        Type_ordinal[type_name] = Next_type_ordinal++;
      }
      types.push_back(Type_ordinal[type_name]);
      trace("parse") << "  type: " << types.back() << end();
    }
    t.elements.push_back(types);
  }
  assert(SIZE(t.elements) == SIZE(t.element_names));
  t.size = SIZE(t.elements);
}

:(scenarios run)
:(scenario container_define_twice)
container foo [
  x:number
]

container foo [
  y:number
]

recipe main [
  1:number <- copy 34
  2:number <- copy 35
  3:number <- get 1:foo, 0:offset
  4:number <- get 1:foo, 1:offset
]
+mem: storing 34 in location 3
+mem: storing 35 in location 4

//: ensure types created in one scenario don't leak outside it.
:(before "End Globals")
vector<type_ordinal> recently_added_types;
:(before "End load_permanently")  //: for non-tests
recently_added_types.clear();
:(before "End Setup")  //: for tests
for (long long int i = 0; i < SIZE(recently_added_types); ++i) {
  Type_ordinal.erase(Type[recently_added_types.at(i)].name);
  Type.erase(recently_added_types.at(i));
}
recently_added_types.clear();
// delete recent type references
// can't rely on recently_added_types to cleanup Type_ordinal, because of deliberately misbehaving tests with references to undefined types
map<string, type_ordinal>::iterator p = Type_ordinal.begin();
while(p != Type_ordinal.end()) {
  // save current item
  string name = p->first;
  type_ordinal t = p->second;
  // increment iterator
  ++p;
  // now delete current item if necessary
  if (t >= 1000) {
    Type_ordinal.erase(name);
  }
}
//: lastly, ensure scenarios are consistent by always starting them at the
//: same type number.
Next_type_ordinal = 1000;
:(before "End Test Run Initialization")
assert(Next_type_ordinal < 1000);
:(before "End Setup")
Next_type_ordinal = 1000;

//:: Allow container definitions anywhere in the codebase, but warn if you
//:: can't find a definition.

:(scenario run_warns_on_unknown_types)
% Hide_warnings = true;
recipe main [
  # integer is not a type
  1:integer <- copy 0
]
+warn: unknown type: integer

:(scenario run_allows_type_definition_after_use)
% Hide_warnings = true;
recipe main [
  1:bar <- copy 0
]

container bar [
  x:number
]
-warn: unknown type: bar
$warn: 0

:(after "int main")
  Transform.push_back(check_invalid_types);

:(code)
void check_invalid_types(const recipe_ordinal r) {
  for (long long int index = 0; index < SIZE(Recipe[r].steps); ++index) {
    const instruction& inst = Recipe[r].steps.at(index);
    for (long long int i = 0; i < SIZE(inst.ingredients); ++i) {
      check_invalid_types(inst.ingredients.at(i));
    }
    for (long long int i = 0; i < SIZE(inst.products); ++i) {
      check_invalid_types(inst.products.at(i));
    }
  }
}

void check_invalid_types(const reagent& r) {
  for (long long int i = 0; i < SIZE(r.types); ++i) {
    if (r.types.at(i) == 0) continue;
    if (Type.find(r.types.at(i)) == Type.end())
      raise << "unknown type: " << r.properties.at(0).second.at(i) << '\n' << end();
  }
}

:(scenario container_unknown_field)
% Hide_warnings = true;
container foo [
  x:number
  y:bar
]
+warn: unknown type for field y in foo

:(scenario read_container_with_bracket_in_comment)
container foo [
  x:number
  # ']' in comment
  y:number
]
+parse: reading container foo
+parse:   element name: x
+parse:   type: 1
+parse:   element name: y
+parse:   type: 1

:(before "End Transform")
check_container_field_types();

:(code)
void check_container_field_types() {
  for (map<type_ordinal, type_info>::iterator p = Type.begin(); p != Type.end(); ++p) {
    const type_info& info = p->second;
    for (long long int i = 0; i < SIZE(info.elements); ++i) {
      for (long long int j = 0; j < SIZE(info.elements.at(i)); ++j) {
        if (info.elements.at(i).at(j) == 0) continue;
        if (Type.find(info.elements.at(i).at(j)) == Type.end())
          raise << "unknown type for field " << info.element_names.at(i) << " in " << info.name << '\n' << end();
      }
    }
  }
}

//:: Construct types out of their constituent fields. Doesn't currently do
//:: type-checking but *does* match sizes.
:(before "End Primitive Recipe Declarations")
MERGE,
:(before "End Primitive Recipe Numbers")
Recipe_ordinal["merge"] = MERGE;
:(before "End Primitive Recipe Implementations")
case MERGE: {
  products.resize(1);
  for (long long int i = 0; i < SIZE(ingredients); ++i)
    for (long long int j = 0; j < SIZE(ingredients.at(i)); ++j)
      products.at(0).push_back(ingredients.at(i).at(j));
  break;
}

:(scenario merge)
container foo [
  x:number
  y:number
]

recipe main [
  1:foo <- merge 3, 4
]
+mem: storing 3 in location 1
+mem: storing 4 in location 2

//:: helpers

:(code)
void skip_bracket(istream& in, string message) {
  skip_whitespace_and_comments(in);
  if (in.get() != '[')
    raise << message << '\n' << end();
}