circom/src/exec.js
src/exec.jsRaw
1/*
2 Copyright 2018 0KIMS association.
3
4 This file is part of circom (Zero Knowledge Circuit Compiler).
5
6 circom is a free software: you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
10
11 circom is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with circom. If not, see <https://www.gnu.org/licenses/>.
18*/
19
20const path = require("path");
21const fs = require("fs");
22
23const bigInt = require("big-integer");
24const __P__ = new bigInt("21888242871839275222246405745257275088548364400416034343698204186575808495617");
25const __MASK__ = new bigInt(2).pow(253).minus(1);
26
27const lc = require("./lcalgebra");
28const parser = require("../parser/jaz.js").parser;
29
30/* TODO: Add lines information
31
32function setLines(dst, first, last) {
33 last = last || first;
34 dst.first_line = first.first_line;
35 dst.first_column = first.first_column;
36 dst.last_line = last.last_line;
37 dst.last_column = last.last_column;
38}
39*/
40
41module.exports = exec;
42
43
44function exec(ctx, ast) {
45 if (!ast) {
46 return error(ctx, ast, "Null AST");
47 }
48 if ((ast.type == "NUMBER") || (ast.type == "LINEARCOMBINATION") || (ast.type =="SIGNAL") || (ast.type == "QEQ")) {
49 return ast;
50 } else if (ast.type == "VARIABLE") {
51 return execVariable(ctx, ast);
52 } else if (ast.type == "PIN") {
53 return execPin(ctx, ast);
54 } else if (ast.type == "OP") {
55 if (ast.op == "=") {
56 return execVarAssignement(ctx, ast);
57 } else if (ast.op == "<--") {
58 return execSignalAssign(ctx, ast);
59 } else if (ast.op == "<==") {
60 return execSignalAssignConstrain(ctx, ast);
61 } else if (ast.op == "===") {
62 return execConstrain(ctx, ast);
63 } else if (ast.op == "+=") {
64 return execVarAddAssignement(ctx, ast);
65 } else if (ast.op == "*=") {
66 return execVarMulAssignement(ctx, ast);
67 } else if (ast.op == "+") {
68 return execAdd(ctx, ast);
69 } else if (ast.op == "-") {
70 return execSub(ctx, ast);
71 } else if (ast.op == "UMINUS") {
72 return execUMinus(ctx, ast);
73 } else if (ast.op == "*") {
74 return execMul(ctx, ast);
75 } else if (ast.op == "%") {
76 return execMod(ctx, ast);
77 } else if (ast.op == "PLUSPLUSRIGHT") {
78 return execPlusPlusRight(ctx, ast);
79 } else if (ast.op == "PLUSPLUSLEFT") {
80 return execPlusPlusLeft(ctx, ast);
81 } else if (ast.op == "/") {
82 return execDiv(ctx, ast);
83 } else if (ast.op == "**") {
84 return execExp(ctx, ast);
85 } else if (ast.op == "&") {
86 return execBAnd(ctx, ast);
87 } else if (ast.op == "<<") {
88 return execShl(ctx, ast);
89 } else if (ast.op == ">>") {
90 return execShr(ctx, ast);
91 } else if (ast.op == "<") {
92 return execLt(ctx, ast);
93 } else if (ast.op == ">") {
94 return execGt(ctx, ast);
95 } else if (ast.op == "<=") {
96 return execLte(ctx, ast);
97 } else if (ast.op == ">=") {
98 return execGte(ctx, ast);
99 } else if (ast.op == "==") {
100 return execEq(ctx, ast);
101 } else if (ast.op == "?") {
102 return execTerCon(ctx, ast);
103 } else {
104 error(ctx, ast, "Invalid operation: " + ast.op);
105 }
106 } else if (ast.type == "DECLARE") {
107 if (ast.declareType == "COMPONENT") {
108 return execDeclareComponent(ctx, ast);
109 } else if ((ast.declareType == "SIGNALIN")||
110 (ast.declareType == "SIGNALOUT")||
111 (ast.declareType == "SIGNAL")) {
112 return execDeclareSignal(ctx, ast);
113 } else if (ast.declareType == "VARIABLE") {
114 return execDeclareVariable(ctx, ast);
115 } else {
116 error(ctx, ast, "Invalid declaration: " + ast.declareType);
117 }
118 } else if (ast.type == "FUNCTIONCALL") {
119 return execFunctionCall(ctx, ast);
120 } else if (ast.type == "BLOCK") {
121 return execBlock(ctx, ast);
122 } else if (ast.type == "FOR") {
123 return execFor(ctx, ast);
124 } else if (ast.type == "WHILE") {
125 return execWhile(ctx, ast);
126 } else if (ast.type == "IF") {
127 return execIf(ctx, ast);
128 } else if (ast.type == "RETURN") {
129 return execReturn(ctx, ast);
130 } else if (ast.type == "TEMPLATEDEF") {
131 return execTemplateDef(ctx, ast);
132 } else if (ast.type == "FUNCTIONDEF") {
133 return execFunctionDef(ctx, ast);
134 } else if (ast.type == "INCLUDE") {
135 return execInclude(ctx, ast);
136 } else if (ast.type == "ARRAY") {
137 return execArray(ctx, ast);
138 } else {
139 error(ctx, ast, "Invalid AST node type: " + ast.type);
140 }
141}
142
143function error(ctx, ast, errStr) {
144 ctx.error = {
145 pos: {
146 first_line: ast.first_line,
147 first_column: ast.first_column,
148 last_line: ast.last_line,
149 last_column: ast.last_column
150 },
151 errStr: errStr,
152 errFile: ctx.fileName,
153 ast: ast
154 };
155}
156
157function iterateSelectors(ctx, sizes, baseName, fn) {
158 if (sizes.length == 0) {
159 return fn(baseName);
160 }
161 const res = [];
162 for (let i=0; i<sizes[0]; i++) {
163 res.push(iterateSelectors(ctx, sizes.slice(1), baseName+"["+i+"]", fn));
164 if (ctx.error) return null;
165 }
166 return res;
167}
168
169function setScope(ctx, name, selectors, value) {
170 let l = getScopeLevel(ctx, name);
171 if (l==-1) l= ctx.scopes.length-1;
172
173 if (selectors.length == 0) {
174 ctx.scopes[l][name] = value;
175 } else {
176 setScopeArray(ctx.scopes[l][name], selectors);
177 }
178
179 function setScopeArray(a, sels) {
180 if (sels.length == 1) {
181 a[sels[0].value] = value;
182 } else {
183 setScopeArray(a[sels[0]], sels.slice(1));
184 }
185 }
186}
187
188function getScope(ctx, name, selectors) {
189
190 const sels = [];
191 if (selectors) {
192 for (let i=0; i< selectors.length; i++) {
193 const idx = exec(ctx, selectors[i]);
194 if (ctx.error) return;
195
196 if (idx.type != "NUMBER") return error(ctx, selectors[i], "expected a number");
197 sels.push( idx.value.toJSNumber() );
198 }
199 }
200
201
202 function select(v, s) {
203 s = s || [];
204 if (s.length == 0) return v;
205 return select(v[s[0]], s.slice(1));
206 }
207
208 for (let i=ctx.scopes.length-1; i>=0; i--) {
209 if (ctx.scopes[i][name]) return select(ctx.scopes[i][name], sels);
210 }
211 return null;
212}
213
214function getScopeLevel(ctx, name) {
215 for (let i=ctx.scopes.length-1; i>=0; i--) {
216 if (ctx.scopes[i][name]) return i;
217 }
218 return -1;
219}
220
221function execBlock(ctx, ast) {
222 for (let i=0; i<ast.statements.length; i++) {
223 exec(ctx, ast.statements[i]);
224 if (ctx.returnValue) return;
225 if (ctx.error) return;
226 }
227}
228
229function execTemplateDef(ctx, ast) {
230 const scope = ctx.scopes[0]; // Lets put templates always in top scope.
231 // const scope = ctx.scopes[ctx.scopes.length-1];
232 if (getScope(ctx, ast.name)) {
233 return error(ctx, ast, "Name already exists: "+ast.name);
234 }
235 scope[ast.name] = {
236 type: "TEMPLATE",
237 params: ast.params,
238 block: ast.block,
239 fileName: ctx.fileName,
240 filePath: ctx.filePath,
241 scopes: copyScope(ctx.scopes)
242 };
243}
244
245function execFunctionDef(ctx, ast) {
246 const scope = ctx.scopes[0]; // Lets put functions always in top scope.
247 // const scope = ctx.scopes[ctx.scopes.length-1];
248 if (getScope(ctx, ast.name)) {
249 return error(ctx, ast, "Name already exists: "+ast.name);
250 }
251 ctx.functionParams[ast.name] = ast.params;
252 scope[ast.name] = {
253 type: "FUNCTION",
254 params: ast.params,
255 block: ast.block,
256 fileName: ctx.fileName,
257 filePath: ctx.filePath,
258 scopes: copyScope(ctx.scopes)
259 };
260}
261
262
263function execDeclareComponent(ctx, ast) {
264 const scope = ctx.scopes[ctx.scopes.length-1];
265
266 if (ast.name.type != "VARIABLE") return error(ctx, ast, "Invalid component name");
267 if (getScope(ctx, ast.name.name)) return error(ctx, ast, "Name already exists: "+ast.name.name);
268
269 const baseName = ctx.currentComponent ? ctx.currentComponent + "." + ast.name.name : ast.name.name;
270
271 const sizes=[];
272 for (let i=0; i< ast.name.selectors.length; i++) {
273 const size = exec(ctx, ast.name.selectors[i]);
274 if (ctx.error) return;
275
276 if (size.type != "NUMBER") return error(ctx, ast.name.selectors[i], "expected a number");
277
278 sizes.push( size.value.toJSNumber() );
279 }
280
281
282 scope[ast.name.name] = iterateSelectors(ctx, sizes, baseName, function(fullName) {
283
284 ctx.components[fullName] = "UNINSTANTIATED";
285
286 return {
287 type: "COMPONENT",
288 fullName: fullName
289 };
290 });
291
292 return {
293 type: "VARIABLE",
294 name: ast.name.name,
295 selectors: []
296 };
297}
298
299function execInstantiateComponet(ctx, vr, fn) {
300
301 if (vr.type != "VARIABLE") return error(ctx, fn, "Left hand instatiate component must be a variable");
302 if (fn.type != "FUNCTIONCALL") return error(ctx, fn, "Right type of instantiate component must be a function call");
303
304 const componentName = vr.name;
305 const templateName = fn.name;
306
307 const scopeLevel = getScopeLevel(ctx, templateName);
308 if (scopeLevel == -1) return error(ctx,fn, "Invalid Template");
309 const template = getScope(ctx, templateName);
310
311 if (template.type != "TEMPLATE") return error(ctx, fn, "Invalid Template");
312
313
314 const paramValues = [];
315 for (let i=0; i< fn.params.length; i++) {
316 const v = exec(ctx, fn.params[i]);
317 if (ctx.error) return;
318
319 if (v.type != "NUMBER") return error(ctx, fn.params[i], "expected a number");
320 paramValues.push( v.value);
321 }
322 if (template.params.length != paramValues.length) error(ctx, fn, "Invalid Number of parameters");
323
324 const vv = getScope(ctx, componentName, vr.selectors);
325
326 if (!vv) return error(ctx, vr, "Component not defined"+ componentName);
327
328 instantiateComponent(vv);
329
330 function instantiateComponent(varVal) {
331 if (Array.isArray(varVal)) {
332 for (let i =0; i<varVal.length; i++) {
333 instantiateComponent(varVal[i]);
334 }
335 return;
336 }
337
338 if (ctx.components[varVal.fullName] != "UNINSTANTIATED") error(ctx, fn, "Component already instantiated");
339
340 const oldComponent = ctx.currentComponent;
341 const oldFileName = ctx.fileName;
342 const oldFilePath = ctx.filePath;
343 ctx.currentComponent = varVal.fullName;
344
345 ctx.components[ctx.currentComponent] = {
346 signals: [],
347 params: {}
348 };
349
350 const oldScopes = ctx.scopes;
351
352 ctx.scopes = oldScopes.slice(0, scopeLevel+1);
353
354 const scope = {};
355 for (let i=0; i< template.params.length; i++) {
356 scope[template.params[i]] = {
357 type: "NUMBER",
358 value: paramValues[i]
359 };
360 ctx.components[ctx.currentComponent].params[template.params[i]] = paramValues[i];
361 }
362
363 ctx.components[ctx.currentComponent].template = templateName;
364 ctx.fileName = template.fileName;
365 ctx.filePath = template.filePath;
366 ctx.scopes = copyScope( template.scopes );
367 ctx.scopes.push(scope);
368
369 execBlock(ctx, template.block);
370
371 ctx.fileName = oldFileName;
372 ctx.filePath = oldFilePath;
373 ctx.currentComponent = oldComponent;
374 ctx.scopes = oldScopes;
375 }
376}
377
378function execFunctionCall(ctx, ast) {
379
380 const scopeLevel = getScopeLevel(ctx, ast.name);
381 if (scopeLevel == -1) return error(ctx, ast, "Function not defined: " + ast.name);
382 const fnc = getScope(ctx, ast.name);
383
384 if (fnc.type != "FUNCTION") return error(ctx, ast, "Not a function: " + ast.name);
385
386 const paramValues = [];
387 for (let i=0; i< ast.params.length; i++) {
388 const v = exec(ctx, ast.params[i]);
389 if (ctx.error) return;
390
391 paramValues.push(v);
392 }
393
394 if (ast.params.length != paramValues.length) error(ctx, ast, "Invalid Number of parameters");
395
396 const oldFileName = ctx.fileName;
397 const oldFilePath = ctx.filePath;
398
399 const oldScopes = ctx.scopes;
400
401 ctx.scopes = oldScopes.slice(0, scopeLevel+1);
402
403 const scope = {};
404 for (let i=0; i< fnc.params.length; i++) {
405 scope[fnc.params[i]] = paramValues[i];
406 }
407
408 ctx.fileName = fnc.fileName;
409 ctx.filePath = fnc.filePath;
410 ctx.scopes = copyScope( fnc.scopes );
411 ctx.scopes.push(scope);
412
413 execBlock(ctx, fnc.block);
414
415 const res = ctx.returnValue;
416 ctx.returnValue = null;
417
418 ctx.fileName = oldFileName;
419 ctx.filePath = oldFilePath;
420 ctx.scopes = oldScopes;
421
422 return res;
423}
424
425function execReturn(ctx, ast) {
426 ctx.returnValue = exec(ctx, ast.value);
427 return;
428}
429
430function execDeclareSignal(ctx, ast) {
431 const scope = ctx.scopes[ctx.scopes.length-1];
432
433 if (ast.name.type != "VARIABLE") return error(ctx, ast, "Invalid component name");
434 if (getScope(ctx, ast.name.name)) return error(ctx, ast, "Name already exists: "+ast.name.name);
435
436 const baseName = ctx.currentComponent ? ctx.currentComponent + "." + ast.name.name : ast.name.name;
437
438 const sizes=[];
439 for (let i=0; i< ast.name.selectors.length; i++) {
440 const size = exec(ctx, ast.name.selectors[i]);
441 if (ctx.error) return;
442
443 if (size.type != "NUMBER") return error(ctx, ast.name.selectors[i], "expected a number");
444 sizes.push( size.value.toJSNumber() );
445 }
446
447 scope[ast.name.name] = iterateSelectors(ctx, sizes, baseName, function(fullName) {
448 ctx.signals[fullName] = {
449 fullName: fullName,
450 direction: ast.declareType == "SIGNALIN" ? "IN" : (ast.declareType == "SIGNALOUT" ? "OUT" : ""),
451 private: ast.private,
452 component: ctx.currentComponent,
453 equivalence: "",
454 alias: [fullName]
455 };
456 ctx.components[ctx.currentComponent].signals.push(fullName);
457 return {
458 type: "SIGNAL",
459 fullName: fullName,
460 };
461 });
462 return {
463 type: "VARIABLE",
464 name: ast.name.name,
465 selectors: []
466 };
467}
468
469function execDeclareVariable(ctx, ast) {
470 const scope = ctx.scopes[ctx.scopes.length-1];
471
472 if (ast.name.type != "VARIABLE") return error(ctx, ast, "Invalid linear combination name");
473 if (getScope(ctx, ast.name.name)) return error(ctx, ast, "Name already exists: "+ast.name.name);
474
475 const sizes=[];
476 for (let i=0; i< ast.name.selectors.length; i++) {
477 const size = exec(ctx, ast.name.selectors[i]);
478 if (ctx.error) return;
479
480 if (size.type != "NUMBER") return error(ctx, ast.name.selectors[i], "expected a number");
481 sizes.push( size.value.toJSNumber() );
482 }
483
484 scope[ast.name.name] = iterateSelectors(ctx, sizes, "", function() {
485 return {
486 type: "NUMBER",
487 value: bigInt(0)
488 };
489 });
490
491 return {
492 type: "VARIABLE",
493 name: ast.name.name,
494 selectors: []
495 };
496}
497
498function execVariable(ctx, ast) {
499 let v;
500 try {
501 v = getScope(ctx, ast.name, ast.selectors);
502 } catch(err) {
503 console.log(JSON.stringify(ast, null,1));
504 }
505 if (ctx.error) return;
506
507 if (!v) return error(ctx, ast, "Variable not defined");
508
509 // If the signal has an assigned value (constant) just return the constant
510 if ((v.type == "SIGNAL") && (ctx.signals[v.fullName].value)) {
511 return {
512 type: "NUMBER",
513 value: ctx.signals[v.fullName].value
514 };
515 }
516 let res;
517 res=v;
518 return res;
519}
520
521function execPin(ctx, ast) {
522 const component = getScope(ctx, ast.component.name, ast.component.selectors);
523 if (!component) return error(ctx, ast.component, "Component does not exists: "+ast.component.name);
524 if (ctx.error) return;
525 let signalFullName = component.fullName + "." + ast.pin.name;
526 for (let i=0; i< ast.pin.selectors.length; i++) {
527 const sel = exec(ctx, ast.pin.selectors[i]);
528 if (ctx.error) return;
529
530 if (sel.type != "NUMBER") return error(ctx, ast.pin.selectors[i], "expected a number");
531
532 signalFullName += "[" + sel.value.toJSNumber() + "]";
533 }
534 if (!ctx.signals[signalFullName]) error(ctx, ast, "Signal not defined:" + signalFullName);
535 return {
536 type: "SIGNAL",
537 fullName: signalFullName
538 };
539}
540
541function execFor(ctx, ast) {
542 exec(ctx, ast.init);
543 if (ctx.error) return;
544
545 let v = exec(ctx, ast.condition);
546 if (ctx.error) return;
547
548 while ((v.value.neq(0))&&(!ctx.returnValue)) {
549 exec(ctx, ast.body);
550 if (ctx.error) return;
551
552 exec(ctx, ast.step);
553 if (ctx.error) return;
554
555 v = exec(ctx, ast.condition);
556 if (ctx.error) return;
557 }
558}
559
560function execWhile(ctx, ast) {
561 let v = exec(ctx, ast.condition);
562 if (ctx.error) return;
563
564 while ((v.value.neq(0))&&(!ctx.returnValue)) {
565 exec(ctx, ast.body);
566 if (ctx.error) return;
567
568 v = exec(ctx, ast.condition);
569 if (ctx.error) return;
570 }
571}
572
573function execIf(ctx, ast) {
574 let v = exec(ctx, ast.condition);
575 if (ctx.error) return;
576
577 if ((v.value.neq(0))&&(!ctx.returnValue)) {
578 exec(ctx, ast.then);
579 if (ctx.error) return;
580 } else {
581 exec(ctx, ast.else);
582 if (ctx.error) return;
583 }
584}
585
586
587function execVarAssignement(ctx, ast) {
588 let v;
589 if (ast.values[0].type == "DECLARE") {
590 v = exec(ctx, ast.values[0]);
591 if (ctx.error) return;
592 } else {
593 v = ast.values[0];
594 }
595 const num = getScope(ctx, v.name, v.selectors);
596 if (ctx.error) return;
597
598 if ((typeof(num) != "object")||(num == null)) return error(ctx, ast, "Variable not defined");
599
600 if (num.type == "COMPONENT") return execInstantiateComponet(ctx, v, ast.values[1]);
601
602 const res = exec(ctx, ast.values[1]);
603 if (ctx.error) return;
604
605 setScope(ctx, v.name, v.selectors, res);
606
607 return v;
608}
609
610function execLt(ctx, ast) {
611 const a = exec(ctx, ast.values[0]);
612 if (ctx.error) return;
613 if (a.type != "NUMBER") return { type: "NUMBER" };
614 const b = exec(ctx, ast.values[1]);
615 if (ctx.error) return;
616 if (b.type != "NUMBER") return { type: "NUMBER" };
617 if (!a.value || !b.value) return { type: "NUMBER" };
618 return {
619 type: "NUMBER",
620 value: a.value.lt(b.value) ? bigInt(1) : bigInt(0)
621 };
622}
623
624function execGt(ctx, ast) {
625 const a = exec(ctx, ast.values[0]);
626 if (ctx.error) return;
627 if (a.type != "NUMBER") return { type: "NUMBER" };
628 const b = exec(ctx, ast.values[1]);
629 if (ctx.error) return;
630 if (b.type != "NUMBER") return { type: "NUMBER" };
631 if (!a.value || !b.value) return { type: "NUMBER" };
632 return {
633 type: "NUMBER",
634 value: a.value.gt(b.value) ? bigInt(1) : bigInt(0)
635 };
636}
637
638function execLte(ctx, ast) {
639 const a = exec(ctx, ast.values[0]);
640 if (ctx.error) return;
641 if (a.type != "NUMBER") return { type: "NUMBER" };
642 const b = exec(ctx, ast.values[1]);
643 if (ctx.error) return;
644 if (b.type != "NUMBER") return { type: "NUMBER" };
645 if (!a.value || !b.value) return { type: "NUMBER" };
646 return {
647 type: "NUMBER",
648 value: a.value.lesserOrEquals(b.value) ? bigInt(1) : bigInt(0)
649 };
650}
651
652function execGte(ctx, ast) {
653 const a = exec(ctx, ast.values[0]);
654 if (ctx.error) return;
655 if (a.type != "NUMBER") return { type: "NUMBER" };
656 const b = exec(ctx, ast.values[1]);
657 if (ctx.error) return;
658 if (b.type != "NUMBER") return { type: "NUMBER" };
659 if (!a.value || !b.value) return { type: "NUMBER" };
660 return {
661 type: "NUMBER",
662 value: a.value.greaterOrEquals(b.value) ? bigInt(1) : bigInt(0)
663 };
664}
665
666
667function execEq(ctx, ast) {
668 const a = exec(ctx, ast.values[0]);
669 if (ctx.error) return;
670 if (a.type != "NUMBER") return { type: "NUMBER" };
671 const b = exec(ctx, ast.values[1]);
672 if (ctx.error) return;
673 if (b.type != "NUMBER") return { type: "NUMBER" };
674 if (!a.value || !b.value) return { type: "NUMBER" };
675 return {
676 type: "NUMBER",
677 value: a.value.eq(b.value) ? bigInt(1) : bigInt(0)
678 };
679}
680
681
682function execBAnd(ctx, ast) {
683 const a = exec(ctx, ast.values[0]);
684 if (ctx.error) return;
685 if (a.type != "NUMBER") return { type: "NUMBER" };
686 const b = exec(ctx, ast.values[1]);
687 if (ctx.error) return;
688 if (b.type != "NUMBER") return { type: "NUMBER" };
689 if (!a.value || !b.value) return { type: "NUMBER" };
690 return {
691 type: "NUMBER",
692 value: a.value.and(b.value).and(__MASK__)
693 };
694}
695
696function execShl(ctx, ast) {
697 const a = exec(ctx, ast.values[0]);
698 if (ctx.error) return;
699 if (a.type != "NUMBER") return { type: "NUMBER" };
700 const b = exec(ctx, ast.values[1]);
701 if (ctx.error) return;
702 if (b.type != "NUMBER") return { type: "NUMBER" };
703 if (!a.value || !b.value) return { type: "NUMBER" };
704 const v = b.value.greater(256) ? 256 : b.value.value;
705 return {
706 type: "NUMBER",
707 value: a.value.shiftLeft(v).and(__MASK__)
708 };
709}
710
711function execShr(ctx, ast) {
712 const a = exec(ctx, ast.values[0]);
713 if (ctx.error) return;
714 if (a.type != "NUMBER") return { type: "NUMBER" };
715 const b = exec(ctx, ast.values[1]);
716 if (ctx.error) return;
717 if (b.type != "NUMBER") return { type: "NUMBER" };
718 if (!a.value || !b.value) return { type: "NUMBER" };
719 const v = b.value.greater(256) ? 256 : b.value.value;
720 return {
721 type: "NUMBER",
722 value: a.value.shiftRight(v).and(__MASK__)
723 };
724}
725
726function execMod(ctx, ast) {
727 const a = exec(ctx, ast.values[0]);
728 if (ctx.error) return;
729 if (a.type != "NUMBER") return { type: "NUMBER" };
730 const b = exec(ctx, ast.values[1]);
731 if (ctx.error) return;
732 if (b.type != "NUMBER") return { type: "NUMBER" };
733 if (!a.value || !b.value) return { type: "NUMBER" };
734 return {
735 type: "NUMBER",
736 value: a.value.mod(b.value)
737 };
738}
739
740
741function execExp(ctx, ast) {
742 const a = exec(ctx, ast.values[0]);
743 if (ctx.error) return;
744 if (a.type != "NUMBER") return { type: "NUMBER" };
745 const b = exec(ctx, ast.values[1]);
746 if (ctx.error) return;
747 if (b.type != "NUMBER") return { type: "NUMBER" };
748 if (!a.value || !b.value) return { type: "NUMBER" };
749 return {
750 type: "NUMBER",
751 value: a.value.modPow(b.value, __P__)
752 };
753}
754
755function execDiv(ctx, ast) {
756 const a = exec(ctx, ast.values[0]);
757 if (ctx.error) return;
758 if (a.type != "NUMBER") return { type: "NUMBER" };
759 const b = exec(ctx, ast.values[1]);
760 if (ctx.error) return;
761 if (b.type != "NUMBER") return { type: "NUMBER" };
762 if (!a.value || !b.value) return { type: "NUMBER" };
763 if (b.value.isZero()) return error(ctx, ast, "Division by zero");
764 return {
765 type: "NUMBER",
766 value: a.value.times(b.value.modInv(__P__)).mod(__P__)
767 };
768}
769
770function execAdd(ctx, ast) {
771 const a = exec(ctx, ast.values[0]);
772 if (ctx.error) return;
773 const b = exec(ctx, ast.values[1]);
774 if (ctx.error) return;
775
776 const res = lc.add(a,b);
777 if (res.type == "ERROR") return error(ctx, ast, res.errStr);
778
779 return res;
780}
781
782function execSub(ctx, ast) {
783 const a = exec(ctx, ast.values[0]);
784 if (ctx.error) return;
785 const b = exec(ctx, ast.values[1]);
786 if (ctx.error) return;
787
788 const res = lc.sub(a,b);
789 if (res.type == "ERROR") return error(ctx, ast, res.errStr);
790
791 return res;
792}
793
794function execUMinus(ctx, ast) {
795 const a = exec(ctx, ast.values[0]);
796 if (ctx.error) return;
797
798 const res = lc.negate(a);
799 if (res.type == "ERROR") return error(ctx, ast, res.errStr);
800
801 return res;
802}
803
804function execMul(ctx, ast) {
805 const a = exec(ctx, ast.values[0]);
806 if (ctx.error) return;
807 const b = exec(ctx, ast.values[1]);
808 if (ctx.error) return;
809
810 const res = lc.mul(a,b);
811 if (res.type == "ERROR") return error(ctx, ast, res.errStr);
812
813 return res;
814}
815
816
817function execVarAddAssignement(ctx, ast) {
818 const res = execAdd(ctx,{ values: [ast.values[0], ast.values[1]] } );
819 if (ctx.error) return;
820 return execVarAssignement(ctx, { values: [ast.values[0], res] });
821}
822
823function execVarMulAssignement(ctx, ast) {
824 const res = execMul(ctx,{ values: [ast.values[0], ast.values[1]] } );
825 if (ctx.error) return;
826 return execVarAssignement(ctx, { values: [ast.values[0], res] });
827}
828
829function execPlusPlusRight(ctx, ast) {
830 const resBefore = exec(ctx, ast.values[0]);
831 if (ctx.error) return;
832 const resAfter = execAdd(ctx,{ values: [ast.values[0], {type: "NUMBER", value: bigInt(1)}] } );
833 if (ctx.error) return;
834 execVarAssignement(ctx, { values: [ast.values[0], resAfter] });
835 return resBefore;
836}
837
838function execPlusPlusLeft(ctx, ast) {
839 if (ctx.error) return;
840 const resAfter = execAdd(ctx,{ values: [ast.values[0], {type: "NUMBER", value: bigInt(1)}] } );
841 if (ctx.error) return;
842 execVarAssignement(ctx, { values: [ast.values[0], resAfter] });
843 return resAfter;
844}
845
846function execTerCon(ctx, ast) {
847 const cond = exec(ctx, ast.values[0]);
848 if (ctx.error) return;
849
850 if (!cond.value) return { type: "NUMBER" };
851
852 if (cond.value.neq(0)) {
853 return exec(ctx, ast.values[1]);
854 } else {
855 return exec(ctx, ast.values[2]);
856 }
857}
858
859function execSignalAssign(ctx, ast) {
860 let vDest;
861 if (ast.values[0].type == "DECLARE") {
862 vDest = exec(ctx, ast.values[0]);
863 if (ctx.error) return;
864 } else {
865 vDest = ast.values[0];
866 }
867
868 let dst;
869 if (vDest.type == "VARIABLE") {
870 dst = getScope(ctx, vDest.name, vDest.selectors);
871 if (ctx.error) return;
872 } else if (vDest.type == "PIN") {
873 dst = execPin(ctx, vDest);
874 if (ctx.error) return;
875 } else {
876 error(ctx, ast, "Bad assignement");
877 }
878
879 if (!dst) return error(ctx, ast, "Signal not defined");
880 if (dst.type != "SIGNAL") return error(ctx, ast, "Signal assigned to a non signal");
881
882 let sDest=ctx.signals[dst.fullName];
883 if (!sDest) return error(ctx, ast, "Invalid signal: "+dst.fullName);
884 while (sDest.equivalence) sDest=ctx.signals[sDest.equivalence];
885
886 if (sDest.value) return error(ctx, ast, "Signals cannot be assigned twice");
887
888 let src = exec(ctx, ast.values[1]);
889 if (ctx.error) return;
890
891
892 /*
893 let vSrc;
894 if (ast.values[1].type == "DECLARE") {
895 vSrc = exec(ctx, ast.values[1]);
896 if (ctx.error) return;
897 } else {
898 vSrc = ast.values[1];
899 }
900
901 if (vSrc.type == "VARIABLE") {
902 src = getScope(ctx, vSrc.name, vSrc.selectors);
903 if (!src) error(ctx, ast, "Variable not defined: " + vSrc.name);
904 if (ctx.error) return;
905 } else if (vSrc.type == "PIN") {
906 src = execPin(ctx, vSrc);
907 }
908 */
909
910 let assignValue = true;
911 if (src.type == "SIGNAL") {
912 sDest.equivalence = src.fullName;
913 sDest.alias = sDest.alias.concat(src.alias);
914 while (sDest.equivalence) sDest=ctx.signals[sDest.equivalence];
915 assignValue = false;
916 }
917
918 if (assignValue) {
919 // const resLC = exec(ctx, vSrc);
920 if (ctx.error) return;
921
922 // const v = lc.evaluate(ctx, resLC);
923 const v = lc.evaluate(ctx, src);
924
925 if (v.value) {
926 sDest.value = v.value;
927 }
928 }
929
930 return vDest;
931}
932
933function execConstrain(ctx, ast) {
934 const a = exec(ctx, ast.values[0]);
935 if (ctx.error) return;
936 const b = exec(ctx, ast.values[1]);
937 if (ctx.error) return;
938
939 const res = lc.sub(a,b);
940 if (res.type == "ERROR") return error(ctx, ast, res.errStr);
941
942 if (!lc.isZero(res)) {
943 ctx.constraints.push(lc.toQEQ(res));
944 }
945
946 return res;
947}
948
949function execSignalAssignConstrain(ctx, ast) {
950 const v = execSignalAssign(ctx,ast);
951 if (ctx.error) return;
952 execConstrain(ctx, ast);
953 if (ctx.error) return;
954 return v;
955}
956
957function execInclude(ctx, ast) {
958 const incFileName = path.resolve(ctx.filePath, ast.file);
959 const incFilePath = path.dirname(incFileName);
960
961 ctx.includedFiles = ctx.includedFiles || [];
962 if (ctx.includedFiles[incFileName]) return;
963
964 ctx.includedFiles[incFileName] = true;
965
966 const src = fs.readFileSync(incFileName, "utf8");
967
968 if (!src) return error(ctx, ast, "Include file not found: "+incFileName);
969
970 const incAst = parser.parse(src);
971
972 const oldFilePath = ctx.filePath;
973 const oldFileName = ctx.fileName;
974 ctx.filePath = incFilePath;
975 ctx.fileName = incFileName;
976
977 exec(ctx, incAst);
978
979 ast.block = incAst;
980
981 ctx.filePath = oldFilePath;
982 ctx.fileName = oldFileName;
983}
984
985function execArray(ctx, ast) {
986 const res = [];
987
988 for (let i=0; i<ast.values.length; i++) {
989 res.push(exec(ctx, ast.values[i]));
990 }
991
992 return res;
993}
994
995function copyScope(scope) {
996 var scopesClone = [];
997 for (let i=0; i<scope.length; i++) {
998 scopesClone.push(scope[i]);
999 }
1000 return scopesClone;
1001}
1002