]>
Commit | Line | Data |
---|---|---|
404f611f | 1 | from collections.abc import MutableMapping |
825abb81 | 2 | import json |
9e3f1991 | 3 | import operator |
2b25cb5d PH |
4 | import re |
5 | ||
6 | from .utils import ( | |
7 | ExtractorError, | |
7769f837 | 8 | remove_quotes, |
2b25cb5d PH |
9 | ) |
10 | ||
9e3f1991 PH |
11 | _OPERATORS = [ |
12 | ('|', operator.or_), | |
13 | ('^', operator.xor), | |
14 | ('&', operator.and_), | |
15 | ('>>', operator.rshift), | |
16 | ('<<', operator.lshift), | |
17 | ('-', operator.sub), | |
18 | ('+', operator.add), | |
19 | ('%', operator.mod), | |
8cfb6efe | 20 | ('/', operator.truediv), |
9e3f1991 PH |
21 | ('*', operator.mul), |
22 | ] | |
23 | _ASSIGN_OPERATORS = [(op + '=', opfunc) for op, opfunc in _OPERATORS] | |
404f611f | 24 | _ASSIGN_OPERATORS.append(('=', (lambda cur, right: right))) |
9e3f1991 PH |
25 | |
26 | _NAME_RE = r'[a-zA-Z_$][a-zA-Z_$0-9]*' | |
27 | ||
2b25cb5d | 28 | |
404f611f | 29 | class JS_Break(ExtractorError): |
30 | def __init__(self): | |
31 | ExtractorError.__init__(self, 'Invalid break') | |
32 | ||
33 | ||
34 | class JS_Continue(ExtractorError): | |
35 | def __init__(self): | |
36 | ExtractorError.__init__(self, 'Invalid continue') | |
37 | ||
38 | ||
39 | class LocalNameSpace(MutableMapping): | |
40 | def __init__(self, *stack): | |
41 | self.stack = tuple(stack) | |
42 | ||
43 | def __getitem__(self, key): | |
44 | for scope in self.stack: | |
45 | if key in scope: | |
46 | return scope[key] | |
47 | raise KeyError(key) | |
48 | ||
49 | def __setitem__(self, key, value): | |
50 | for scope in self.stack: | |
51 | if key in scope: | |
52 | scope[key] = value | |
53 | break | |
54 | else: | |
55 | self.stack[0][key] = value | |
56 | return value | |
57 | ||
58 | def __delitem__(self, key): | |
59 | raise NotImplementedError('Deleting is not supported') | |
60 | ||
61 | def __iter__(self): | |
62 | for scope in self.stack: | |
63 | yield from scope | |
64 | ||
65 | def __len__(self, key): | |
66 | return len(iter(self)) | |
67 | ||
68 | def __repr__(self): | |
69 | return f'LocalNameSpace{self.stack}' | |
70 | ||
71 | ||
2b25cb5d | 72 | class JSInterpreter(object): |
9e3f1991 PH |
73 | def __init__(self, code, objects=None): |
74 | if objects is None: | |
75 | objects = {} | |
3eff81fb | 76 | self.code = code |
2b25cb5d | 77 | self._functions = {} |
9e3f1991 | 78 | self._objects = objects |
404f611f | 79 | self.__named_object_counter = 0 |
80 | ||
81 | def _named_object(self, namespace, obj): | |
82 | self.__named_object_counter += 1 | |
83 | name = f'__yt_dlp_jsinterp_obj{self.__named_object_counter}' | |
84 | namespace[name] = obj | |
85 | return name | |
86 | ||
87 | @staticmethod | |
88 | def _seperate(expr, delim=',', max_split=None): | |
89 | if not expr: | |
90 | return | |
91 | parens = {'(': 0, '{': 0, '[': 0, ']': 0, '}': 0, ')': 0} | |
92 | start, splits, pos, max_pos = 0, 0, 0, len(delim) - 1 | |
93 | for idx, char in enumerate(expr): | |
94 | if char in parens: | |
95 | parens[char] += 1 | |
96 | is_in_parens = (parens['['] - parens[']'] | |
97 | or parens['('] - parens[')'] | |
98 | or parens['{'] - parens['}']) | |
99 | if char == delim[pos] and not is_in_parens: | |
100 | if pos == max_pos: | |
101 | pos = 0 | |
102 | yield expr[start: idx - max_pos] | |
103 | start = idx + 1 | |
104 | splits += 1 | |
105 | if max_split and splits >= max_split: | |
106 | break | |
107 | else: | |
108 | pos += 1 | |
109 | else: | |
110 | pos = 0 | |
111 | yield expr[start:] | |
112 | ||
113 | @staticmethod | |
114 | def _seperate_at_paren(expr, delim): | |
115 | seperated = list(JSInterpreter._seperate(expr, delim, 1)) | |
116 | if len(seperated) < 2: | |
117 | raise ExtractorError(f'No terminating paren {delim} in {expr}') | |
118 | return seperated[0][1:].strip(), seperated[1].strip() | |
9e3f1991 | 119 | |
9e3f1991 | 120 | def interpret_statement(self, stmt, local_vars, allow_recursion=100): |
2b25cb5d PH |
121 | if allow_recursion < 0: |
122 | raise ExtractorError('Recursion limit reached') | |
123 | ||
404f611f | 124 | sub_statements = list(self._seperate(stmt, ';')) |
125 | stmt = (sub_statements or ['']).pop() | |
126 | for sub_stmt in sub_statements: | |
127 | ret, should_abort = self.interpret_statement(sub_stmt, local_vars, allow_recursion - 1) | |
128 | if should_abort: | |
129 | return ret | |
130 | ||
9e3f1991 PH |
131 | should_abort = False |
132 | stmt = stmt.lstrip() | |
133 | stmt_m = re.match(r'var\s', stmt) | |
134 | if stmt_m: | |
135 | expr = stmt[len(stmt_m.group(0)):] | |
2b25cb5d | 136 | else: |
9e3f1991 PH |
137 | return_m = re.match(r'return(?:\s+|$)', stmt) |
138 | if return_m: | |
139 | expr = stmt[len(return_m.group(0)):] | |
140 | should_abort = True | |
141 | else: | |
142 | # Try interpreting it as an expression | |
143 | expr = stmt | |
2b25cb5d PH |
144 | |
145 | v = self.interpret_expression(expr, local_vars, allow_recursion) | |
9e3f1991 | 146 | return v, should_abort |
2b25cb5d PH |
147 | |
148 | def interpret_expression(self, expr, local_vars, allow_recursion): | |
9e3f1991 | 149 | expr = expr.strip() |
9e3f1991 PH |
150 | if expr == '': # Empty expression |
151 | return None | |
152 | ||
404f611f | 153 | if expr.startswith('{'): |
154 | inner, outer = self._seperate_at_paren(expr, '}') | |
155 | inner, should_abort = self.interpret_statement(inner, local_vars, allow_recursion - 1) | |
156 | if not outer or should_abort: | |
157 | return inner | |
158 | else: | |
159 | expr = json.dumps(inner) + outer | |
160 | ||
9e3f1991 | 161 | if expr.startswith('('): |
404f611f | 162 | inner, outer = self._seperate_at_paren(expr, ')') |
163 | inner = self.interpret_expression(inner, local_vars, allow_recursion) | |
164 | if not outer: | |
165 | return inner | |
166 | else: | |
167 | expr = json.dumps(inner) + outer | |
168 | ||
169 | if expr.startswith('['): | |
170 | inner, outer = self._seperate_at_paren(expr, ']') | |
171 | name = self._named_object(local_vars, [ | |
172 | self.interpret_expression(item, local_vars, allow_recursion) | |
173 | for item in self._seperate(inner)]) | |
174 | expr = name + outer | |
175 | ||
176 | m = re.match(r'try\s*', expr) | |
177 | if m: | |
178 | if expr[m.end()] == '{': | |
179 | try_expr, expr = self._seperate_at_paren(expr[m.end():], '}') | |
180 | else: | |
181 | try_expr, expr = expr[m.end() - 1:], '' | |
182 | ret, should_abort = self.interpret_statement(try_expr, local_vars, allow_recursion - 1) | |
183 | if should_abort: | |
184 | return ret | |
185 | return self.interpret_statement(expr, local_vars, allow_recursion - 1)[0] | |
186 | ||
187 | m = re.match(r'catch\s*\(', expr) | |
188 | if m: | |
189 | # We ignore the catch block | |
190 | _, expr = self._seperate_at_paren(expr, '}') | |
191 | return self.interpret_statement(expr, local_vars, allow_recursion - 1)[0] | |
192 | ||
193 | m = re.match(r'for\s*\(', expr) | |
194 | if m: | |
195 | constructor, remaining = self._seperate_at_paren(expr[m.end() - 1:], ')') | |
196 | if remaining.startswith('{'): | |
197 | body, expr = self._seperate_at_paren(remaining, '}') | |
198 | else: | |
199 | m = re.match(r'switch\s*\(', remaining) # FIXME | |
200 | if m: | |
201 | switch_val, remaining = self._seperate_at_paren(remaining[m.end() - 1:], ')') | |
202 | body, expr = self._seperate_at_paren(remaining, '}') | |
203 | body = 'switch(%s){%s}' % (switch_val, body) | |
9e3f1991 | 204 | else: |
404f611f | 205 | body, expr = remaining, '' |
206 | start, cndn, increment = self._seperate(constructor, ';') | |
207 | if self.interpret_statement(start, local_vars, allow_recursion - 1)[1]: | |
208 | raise ExtractorError( | |
209 | f'Premature return in the initialization of a for loop in {constructor!r}') | |
210 | while True: | |
211 | if not self.interpret_expression(cndn, local_vars, allow_recursion): | |
212 | break | |
213 | try: | |
214 | ret, should_abort = self.interpret_statement(body, local_vars, allow_recursion - 1) | |
215 | if should_abort: | |
216 | return ret | |
217 | except JS_Break: | |
218 | break | |
219 | except JS_Continue: | |
220 | pass | |
221 | if self.interpret_statement(increment, local_vars, allow_recursion - 1)[1]: | |
222 | raise ExtractorError( | |
223 | f'Premature return in the initialization of a for loop in {constructor!r}') | |
224 | return self.interpret_statement(expr, local_vars, allow_recursion - 1)[0] | |
225 | ||
226 | m = re.match(r'switch\s*\(', expr) | |
227 | if m: | |
228 | switch_val, remaining = self._seperate_at_paren(expr[m.end() - 1:], ')') | |
229 | switch_val = self.interpret_expression(switch_val, local_vars, allow_recursion) | |
230 | body, expr = self._seperate_at_paren(remaining, '}') | |
231 | body, default = body.split('default:') if 'default:' in body else (body, None) | |
232 | items = body.split('case ')[1:] | |
233 | if default: | |
234 | items.append(f'default:{default}') | |
235 | matched = False | |
236 | for item in items: | |
237 | case, stmt = [i.strip() for i in self._seperate(item, ':', 1)] | |
238 | matched = matched or case == 'default' or switch_val == self.interpret_expression(case, local_vars, allow_recursion) | |
239 | if matched: | |
240 | try: | |
241 | ret, should_abort = self.interpret_statement(stmt, local_vars, allow_recursion - 1) | |
242 | if should_abort: | |
243 | return ret | |
244 | except JS_Break: | |
9e3f1991 | 245 | break |
404f611f | 246 | return self.interpret_statement(expr, local_vars, allow_recursion - 1)[0] |
247 | ||
248 | # Comma seperated statements | |
249 | sub_expressions = list(self._seperate(expr)) | |
250 | expr = sub_expressions.pop().strip() if sub_expressions else '' | |
251 | for sub_expr in sub_expressions: | |
252 | self.interpret_expression(sub_expr, local_vars, allow_recursion) | |
253 | ||
254 | for m in re.finditer(rf'''(?x) | |
255 | (?P<pre_sign>\+\+|--)(?P<var1>{_NAME_RE})| | |
256 | (?P<var2>{_NAME_RE})(?P<post_sign>\+\+|--)''', expr): | |
257 | var = m.group('var1') or m.group('var2') | |
258 | start, end = m.span() | |
259 | sign = m.group('pre_sign') or m.group('post_sign') | |
260 | ret = local_vars[var] | |
261 | local_vars[var] += 1 if sign[0] == '+' else -1 | |
262 | if m.group('pre_sign'): | |
263 | ret = local_vars[var] | |
264 | expr = expr[:start] + json.dumps(ret) + expr[end:] | |
9e3f1991 PH |
265 | |
266 | for op, opfunc in _ASSIGN_OPERATORS: | |
267 | m = re.match(r'''(?x) | |
268 | (?P<out>%s)(?:\[(?P<index>[^\]]+?)\])? | |
269 | \s*%s | |
270 | (?P<expr>.*)$''' % (_NAME_RE, re.escape(op)), expr) | |
271 | if not m: | |
272 | continue | |
404f611f | 273 | right_val = self.interpret_expression(m.group('expr'), local_vars, allow_recursion) |
9e3f1991 PH |
274 | |
275 | if m.groupdict().get('index'): | |
276 | lvar = local_vars[m.group('out')] | |
404f611f | 277 | idx = self.interpret_expression(m.group('index'), local_vars, allow_recursion) |
278 | if not isinstance(idx, int): | |
279 | raise ExtractorError(f'List indices must be integers: {idx}') | |
9e3f1991 PH |
280 | cur = lvar[idx] |
281 | val = opfunc(cur, right_val) | |
282 | lvar[idx] = val | |
283 | return val | |
284 | else: | |
285 | cur = local_vars.get(m.group('out')) | |
286 | val = opfunc(cur, right_val) | |
287 | local_vars[m.group('out')] = val | |
288 | return val | |
289 | ||
2b25cb5d PH |
290 | if expr.isdigit(): |
291 | return int(expr) | |
292 | ||
404f611f | 293 | if expr == 'break': |
294 | raise JS_Break() | |
295 | elif expr == 'continue': | |
296 | raise JS_Continue() | |
297 | ||
9e3f1991 | 298 | var_m = re.match( |
404f611f | 299 | r'(?!if|return|true|false|null)(?P<name>%s)$' % _NAME_RE, |
9e3f1991 PH |
300 | expr) |
301 | if var_m: | |
302 | return local_vars[var_m.group('name')] | |
2b25cb5d | 303 | |
825abb81 PH |
304 | try: |
305 | return json.loads(expr) | |
306 | except ValueError: | |
307 | pass | |
308 | ||
309 | m = re.match( | |
7769f837 S |
310 | r'(?P<in>%s)\[(?P<idx>.+)\]$' % _NAME_RE, expr) |
311 | if m: | |
312 | val = local_vars[m.group('in')] | |
404f611f | 313 | idx = self.interpret_expression(m.group('idx'), local_vars, allow_recursion) |
7769f837 S |
314 | return val[idx] |
315 | ||
404f611f | 316 | for op, opfunc in _OPERATORS: |
317 | seperated = list(self._seperate(expr, op)) | |
318 | if len(seperated) < 2: | |
319 | continue | |
320 | right_val = seperated.pop() | |
321 | left_val = op.join(seperated) | |
322 | left_val, should_abort = self.interpret_statement( | |
323 | left_val, local_vars, allow_recursion - 1) | |
324 | if should_abort: | |
325 | raise ExtractorError(f'Premature left-side return of {op} in {expr!r}') | |
326 | right_val, should_abort = self.interpret_statement( | |
327 | right_val, local_vars, allow_recursion - 1) | |
328 | if should_abort: | |
329 | raise ExtractorError(f'Premature right-side return of {op} in {expr!r}') | |
330 | return opfunc(left_val or 0, right_val) | |
331 | ||
7769f837 | 332 | m = re.match( |
404f611f | 333 | r'(?P<var>%s)(?:\.(?P<member>[^(]+)|\[(?P<member2>[^]]+)\])\s*' % _NAME_RE, |
825abb81 | 334 | expr) |
2b25cb5d | 335 | if m: |
825abb81 | 336 | variable = m.group('var') |
7769f837 | 337 | member = remove_quotes(m.group('member') or m.group('member2')) |
404f611f | 338 | arg_str = expr[m.end():] |
339 | if arg_str.startswith('('): | |
340 | arg_str, remaining = self._seperate_at_paren(arg_str, ')') | |
825abb81 | 341 | else: |
404f611f | 342 | arg_str, remaining = None, arg_str |
343 | ||
344 | def assertion(cndn, msg): | |
345 | """ assert, but without risk of getting optimized out """ | |
346 | if not cndn: | |
347 | raise ExtractorError(f'{member} {msg}: {expr}') | |
348 | ||
349 | def eval_method(): | |
350 | nonlocal member | |
351 | if variable == 'String': | |
352 | obj = str | |
353 | elif variable in local_vars: | |
354 | obj = local_vars[variable] | |
355 | else: | |
356 | if variable not in self._objects: | |
357 | self._objects[variable] = self.extract_object(variable) | |
358 | obj = self._objects[variable] | |
359 | ||
360 | if arg_str is None: | |
361 | # Member access | |
362 | if member == 'length': | |
363 | return len(obj) | |
364 | return obj[member] | |
365 | ||
366 | # Function call | |
367 | argvals = [ | |
825abb81 | 368 | self.interpret_expression(v, local_vars, allow_recursion) |
404f611f | 369 | for v in self._seperate(arg_str)] |
370 | ||
371 | if obj == str: | |
372 | if member == 'fromCharCode': | |
373 | assertion(argvals, 'takes one or more arguments') | |
374 | return ''.join(map(chr, argvals)) | |
375 | raise ExtractorError(f'Unsupported string method {member}') | |
376 | ||
377 | if member == 'split': | |
378 | assertion(argvals, 'takes one or more arguments') | |
379 | assertion(argvals == [''], 'with arguments is not implemented') | |
380 | return list(obj) | |
381 | elif member == 'join': | |
382 | assertion(isinstance(obj, list), 'must be applied on a list') | |
383 | assertion(len(argvals) == 1, 'takes exactly one argument') | |
384 | return argvals[0].join(obj) | |
385 | elif member == 'reverse': | |
386 | assertion(not argvals, 'does not take any arguments') | |
387 | obj.reverse() | |
388 | return obj | |
389 | elif member == 'slice': | |
390 | assertion(isinstance(obj, list), 'must be applied on a list') | |
391 | assertion(len(argvals) == 1, 'takes exactly one argument') | |
392 | return obj[argvals[0]:] | |
393 | elif member == 'splice': | |
394 | assertion(isinstance(obj, list), 'must be applied on a list') | |
395 | assertion(argvals, 'takes one or more arguments') | |
396 | index, howMany = (argvals + [len(obj)])[:2] | |
397 | if index < 0: | |
398 | index += len(obj) | |
399 | add_items = argvals[2:] | |
400 | res = [] | |
401 | for i in range(index, min(index + howMany, len(obj))): | |
402 | res.append(obj.pop(index)) | |
403 | for i, item in enumerate(add_items): | |
404 | obj.insert(index + i, item) | |
405 | return res | |
406 | elif member == 'unshift': | |
407 | assertion(isinstance(obj, list), 'must be applied on a list') | |
408 | assertion(argvals, 'takes one or more arguments') | |
409 | for item in reversed(argvals): | |
410 | obj.insert(0, item) | |
411 | return obj | |
412 | elif member == 'pop': | |
413 | assertion(isinstance(obj, list), 'must be applied on a list') | |
414 | assertion(not argvals, 'does not take any arguments') | |
415 | if not obj: | |
416 | return | |
417 | return obj.pop() | |
418 | elif member == 'push': | |
419 | assertion(argvals, 'takes one or more arguments') | |
420 | obj.extend(argvals) | |
421 | return obj | |
422 | elif member == 'forEach': | |
423 | assertion(argvals, 'takes one or more arguments') | |
424 | assertion(len(argvals) <= 2, 'takes at-most 2 arguments') | |
425 | f, this = (argvals + [''])[:2] | |
426 | return [f((item, idx, obj), this=this) for idx, item in enumerate(obj)] | |
427 | elif member == 'indexOf': | |
428 | assertion(argvals, 'takes one or more arguments') | |
429 | assertion(len(argvals) <= 2, 'takes at-most 2 arguments') | |
430 | idx, start = (argvals + [0])[:2] | |
431 | try: | |
432 | return obj.index(idx, start) | |
433 | except ValueError: | |
434 | return -1 | |
435 | ||
436 | if isinstance(obj, list): | |
437 | member = int(member) | |
438 | return obj[member](argvals) | |
439 | ||
440 | if remaining: | |
441 | return self.interpret_expression( | |
442 | self._named_object(local_vars, eval_method()) + remaining, | |
443 | local_vars, allow_recursion) | |
444 | else: | |
445 | return eval_method() | |
2b25cb5d | 446 | |
404f611f | 447 | m = re.match(r'^(?P<func>%s)\((?P<args>[a-zA-Z0-9_$,]*)\)$' % _NAME_RE, expr) |
2b25cb5d PH |
448 | if m: |
449 | fname = m.group('func') | |
825abb81 PH |
450 | argvals = tuple([ |
451 | int(v) if v.isdigit() else local_vars[v] | |
404f611f | 452 | for v in self._seperate(m.group('args'))]) |
453 | if fname in local_vars: | |
454 | return local_vars[fname](argvals) | |
455 | elif fname not in self._functions: | |
1f749b66 | 456 | self._functions[fname] = self.extract_function(fname) |
2b25cb5d | 457 | return self._functions[fname](argvals) |
9e3f1991 | 458 | |
404f611f | 459 | if expr: |
460 | raise ExtractorError('Unsupported JS expression %r' % expr) | |
2b25cb5d | 461 | |
ad25aee2 | 462 | def extract_object(self, objname): |
7769f837 | 463 | _FUNC_NAME_RE = r'''(?:[a-zA-Z$0-9]+|"[a-zA-Z$0-9]+"|'[a-zA-Z$0-9]+')''' |
ad25aee2 JMF |
464 | obj = {} |
465 | obj_m = re.search( | |
0e2d626d S |
466 | r'''(?x) |
467 | (?<!this\.)%s\s*=\s*{\s* | |
468 | (?P<fields>(%s\s*:\s*function\s*\(.*?\)\s*{.*?}(?:,\s*)?)*) | |
469 | }\s*; | |
470 | ''' % (re.escape(objname), _FUNC_NAME_RE), | |
ad25aee2 JMF |
471 | self.code) |
472 | fields = obj_m.group('fields') | |
473 | # Currently, it only supports function definitions | |
474 | fields_m = re.finditer( | |
0e2d626d S |
475 | r'''(?x) |
476 | (?P<key>%s)\s*:\s*function\s*\((?P<args>[a-z,]+)\){(?P<code>[^}]+)} | |
477 | ''' % _FUNC_NAME_RE, | |
ad25aee2 JMF |
478 | fields) |
479 | for f in fields_m: | |
480 | argnames = f.group('args').split(',') | |
7769f837 | 481 | obj[remove_quotes(f.group('key'))] = self.build_function(argnames, f.group('code')) |
ad25aee2 JMF |
482 | |
483 | return obj | |
484 | ||
404f611f | 485 | def extract_function_code(self, funcname): |
486 | """ @returns argnames, code """ | |
2b25cb5d | 487 | func_m = re.search( |
9e3f1991 | 488 | r'''(?x) |
b46eabec | 489 | (?:function\s+%s|[{;,]\s*%s\s*=\s*function|var\s+%s\s*=\s*function)\s* |
9e3f1991 | 490 | \((?P<args>[^)]*)\)\s* |
404f611f | 491 | (?P<code>\{(?:(?!};)[^"]|"([^"]|\\")*")+\})''' % ( |
ff29bf81 | 492 | re.escape(funcname), re.escape(funcname), re.escape(funcname)), |
2b25cb5d | 493 | self.code) |
404f611f | 494 | code, _ = self._seperate_at_paren(func_m.group('code'), '}') # refine the match |
77ffa957 PH |
495 | if func_m is None: |
496 | raise ExtractorError('Could not find JS function %r' % funcname) | |
404f611f | 497 | return func_m.group('args').split(','), code |
2b25cb5d | 498 | |
404f611f | 499 | def extract_function(self, funcname): |
500 | return self.extract_function_from_code(*self.extract_function_code(funcname)) | |
501 | ||
502 | def extract_function_from_code(self, argnames, code, *global_stack): | |
503 | local_vars = {} | |
504 | while True: | |
505 | mobj = re.search(r'function\((?P<args>[^)]*)\)\s*{', code) | |
506 | if mobj is None: | |
507 | break | |
508 | start, body_start = mobj.span() | |
509 | body, remaining = self._seperate_at_paren(code[body_start - 1:], '}') | |
510 | name = self._named_object( | |
511 | local_vars, | |
512 | self.extract_function_from_code( | |
513 | [str.strip(x) for x in mobj.group('args').split(',')], | |
514 | body, local_vars, *global_stack)) | |
515 | code = code[:start] + name + remaining | |
516 | return self.build_function(argnames, code, local_vars, *global_stack) | |
ad25aee2 | 517 | |
9e3f1991 | 518 | def call_function(self, funcname, *args): |
404f611f | 519 | return self.extract_function(funcname)(args) |
520 | ||
521 | def build_function(self, argnames, code, *global_stack): | |
522 | global_stack = list(global_stack) or [{}] | |
523 | local_vars = global_stack.pop(0) | |
524 | ||
525 | def resf(args, **kwargs): | |
526 | local_vars.update({ | |
527 | **dict(zip(argnames, args)), | |
528 | **kwargs | |
529 | }) | |
530 | var_stack = LocalNameSpace(local_vars, *global_stack) | |
531 | for stmt in self._seperate(code.replace('\n', ''), ';'): | |
532 | ret, should_abort = self.interpret_statement(stmt, var_stack) | |
533 | if should_abort: | |
9e3f1991 | 534 | break |
404f611f | 535 | return ret |
2b25cb5d | 536 | return resf |