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39 | |
40 | #include "qv4globalobject_p.h" |
41 | #include <private/qv4mm_p.h> |
42 | #include "qv4value_p.h" |
43 | #include "qv4context_p.h" |
44 | #include "qv4function_p.h" |
45 | #include "qv4debugging_p.h" |
46 | #include "qv4profiling_p.h" |
47 | #include "qv4script_p.h" |
48 | #include "qv4scopedvalue_p.h" |
49 | #include "qv4string_p.h" |
50 | #include "qv4jscall_p.h" |
51 | |
52 | #include <private/qv4codegen_p.h> |
53 | #include <private/qv4alloca_p.h> |
54 | #include "private/qlocale_tools_p.h" |
55 | #include "private/qtools_p.h" |
56 | |
57 | #include <QtCore/QDebug> |
58 | #include <QtCore/QString> |
59 | #include <iostream> |
60 | |
61 | #include <wtf/MathExtras.h> |
62 | |
63 | using namespace QV4; |
64 | using QtMiscUtils::toHexUpper; |
65 | using QtMiscUtils::fromHex; |
66 | |
67 | static QString escape(const QString &input) |
68 | { |
69 | QString output; |
70 | output.reserve(asize: input.size() * 3); |
71 | const int length = input.length(); |
72 | for (int i = 0; i < length; ++i) { |
73 | ushort uc = input.at(i).unicode(); |
74 | if (uc < 0x100) { |
75 | if ( (uc > 0x60 && uc < 0x7B) |
76 | || (uc > 0x3F && uc < 0x5B) |
77 | || (uc > 0x2C && uc < 0x3A) |
78 | || (uc == 0x2A) |
79 | || (uc == 0x2B) |
80 | || (uc == 0x5F)) { |
81 | output.append(c: QChar(uc)); |
82 | } else { |
83 | output.append(c: '%'); |
84 | output.append(c: QLatin1Char(toHexUpper(value: uc >> 4))); |
85 | output.append(c: QLatin1Char(toHexUpper(value: uc))); |
86 | } |
87 | } else { |
88 | output.append(c: '%'); |
89 | output.append(c: 'u'); |
90 | output.append(c: QLatin1Char(toHexUpper(value: uc >> 12))); |
91 | output.append(c: QLatin1Char(toHexUpper(value: uc >> 8))); |
92 | output.append(c: QLatin1Char(toHexUpper(value: uc >> 4))); |
93 | output.append(c: QLatin1Char(toHexUpper(value: uc))); |
94 | } |
95 | } |
96 | return output; |
97 | } |
98 | |
99 | static QString unescape(const QString &input) |
100 | { |
101 | QString result; |
102 | result.reserve(asize: input.length()); |
103 | int i = 0; |
104 | const int length = input.length(); |
105 | while (i < length) { |
106 | QChar c = input.at(i: i++); |
107 | if ((c == '%') && (i + 1 < length)) { |
108 | QChar a = input.at(i); |
109 | if ((a == 'u') && (i + 4 < length)) { |
110 | int d3 = fromHex(c: input.at(i: i+1).unicode()); |
111 | int d2 = fromHex(c: input.at(i: i+2).unicode()); |
112 | int d1 = fromHex(c: input.at(i: i+3).unicode()); |
113 | int d0 = fromHex(c: input.at(i: i+4).unicode()); |
114 | if ((d3 != -1) && (d2 != -1) && (d1 != -1) && (d0 != -1)) { |
115 | ushort uc = ushort((d3 << 12) | (d2 << 8) | (d1 << 4) | d0); |
116 | result.append(c: QChar(uc)); |
117 | i += 5; |
118 | } else { |
119 | result.append(c); |
120 | } |
121 | } else { |
122 | int d1 = fromHex(c: a.unicode()); |
123 | int d0 = fromHex(c: input.at(i: i+1).unicode()); |
124 | if ((d1 != -1) && (d0 != -1)) { |
125 | c = (d1 << 4) | d0; |
126 | i += 2; |
127 | } |
128 | result.append(c); |
129 | } |
130 | } else { |
131 | result.append(c); |
132 | } |
133 | } |
134 | return result; |
135 | } |
136 | |
137 | static const char uriReserved[] = ";/?:@&=+$,#" ; |
138 | static const char uriUnescaped[] = "-_.!~*'()" ; |
139 | static const char uriUnescapedReserved[] = "-_.!~*'();/?:@&=+$,#" ; |
140 | |
141 | static void addEscapeSequence(QString &output, uchar ch) |
142 | { |
143 | output.append(c: QLatin1Char('%')); |
144 | output.append(c: QLatin1Char(toHexUpper(value: ch >> 4))); |
145 | output.append(c: QLatin1Char(toHexUpper(value: ch & 0xf))); |
146 | } |
147 | |
148 | static QString encode(const QString &input, const char *unescapedSet, bool *ok) |
149 | { |
150 | *ok = true; |
151 | QString output; |
152 | const int length = input.length(); |
153 | int i = 0; |
154 | while (i < length) { |
155 | const QChar c = input.at(i); |
156 | bool escape = true; |
157 | if ((c.unicode() >= 'a' && c.unicode() <= 'z') || |
158 | (c.unicode() >= 'A' && c.unicode() <= 'Z') || |
159 | (c.unicode() >= '0' && c.unicode() <= '9')) { |
160 | escape = false; |
161 | } else { |
162 | const char *r = unescapedSet; |
163 | while (*r) { |
164 | if (*r == c.unicode()) { |
165 | escape = false; |
166 | break; |
167 | } |
168 | ++r; |
169 | } |
170 | } |
171 | if (escape) { |
172 | uint uc = c.unicode(); |
173 | if ((uc >= 0xDC00) && (uc <= 0xDFFF)) { |
174 | *ok = false; |
175 | break; |
176 | } |
177 | if (!((uc < 0xD800) || (uc > 0xDBFF))) { |
178 | ++i; |
179 | if (i == length) { |
180 | *ok = false; |
181 | break; |
182 | } |
183 | const uint uc2 = input.at(i).unicode(); |
184 | if ((uc2 < 0xDC00) || (uc2 > 0xDFFF)) { |
185 | *ok = false; |
186 | break; |
187 | } |
188 | uc = ((uc - 0xD800) * 0x400) + (uc2 - 0xDC00) + 0x10000; |
189 | } |
190 | if (uc < 0x80) { |
191 | addEscapeSequence(output, ch: (uchar)uc); |
192 | } else { |
193 | if (uc < 0x0800) { |
194 | addEscapeSequence(output, ch: 0xc0 | ((uchar) (uc >> 6))); |
195 | } else { |
196 | |
197 | if (QChar::requiresSurrogates(ucs4: uc)) { |
198 | addEscapeSequence(output, ch: 0xf0 | ((uchar) (uc >> 18))); |
199 | addEscapeSequence(output, ch: 0x80 | (((uchar) (uc >> 12)) & 0x3f)); |
200 | } else { |
201 | addEscapeSequence(output, ch: 0xe0 | (((uchar) (uc >> 12)) & 0x3f)); |
202 | } |
203 | addEscapeSequence(output, ch: 0x80 | (((uchar) (uc >> 6)) & 0x3f)); |
204 | } |
205 | addEscapeSequence(output, ch: 0x80 | ((uchar) (uc&0x3f))); |
206 | } |
207 | } else { |
208 | output.append(c); |
209 | } |
210 | ++i; |
211 | } |
212 | if (i != length) |
213 | *ok = false; |
214 | return output; |
215 | } |
216 | |
217 | enum DecodeMode { |
218 | DecodeAll, |
219 | DecodeNonReserved |
220 | }; |
221 | |
222 | static QString decode(const QString &input, DecodeMode decodeMode, bool *ok) |
223 | { |
224 | *ok = true; |
225 | QString output; |
226 | output.reserve(asize: input.length()); |
227 | const int length = input.length(); |
228 | int i = 0; |
229 | const QChar percent = QLatin1Char('%'); |
230 | while (i < length) { |
231 | const QChar ch = input.at(i); |
232 | if (ch == percent) { |
233 | int start = i; |
234 | if (i + 2 >= length) |
235 | goto error; |
236 | |
237 | int d1 = fromHex(c: input.at(i: i+1).unicode()); |
238 | int d0 = fromHex(c: input.at(i: i+2).unicode()); |
239 | if ((d1 == -1) || (d0 == -1)) |
240 | goto error; |
241 | |
242 | int b = (d1 << 4) | d0; |
243 | i += 2; |
244 | if (b & 0x80) { |
245 | int uc; |
246 | int min_uc; |
247 | int need; |
248 | if ((b & 0xe0) == 0xc0) { |
249 | uc = b & 0x1f; |
250 | need = 1; |
251 | min_uc = 0x80; |
252 | } else if ((b & 0xf0) == 0xe0) { |
253 | uc = b & 0x0f; |
254 | need = 2; |
255 | min_uc = 0x800; |
256 | } else if ((b & 0xf8) == 0xf0) { |
257 | uc = b & 0x07; |
258 | need = 3; |
259 | min_uc = 0x10000; |
260 | } else { |
261 | goto error; |
262 | } |
263 | |
264 | if (i + (3 * need) >= length) |
265 | goto error; |
266 | |
267 | for (int j = 0; j < need; ++j) { |
268 | ++i; |
269 | if (input.at(i) != percent) |
270 | goto error; |
271 | |
272 | d1 = fromHex(c: input.at(i: i+1).unicode()); |
273 | d0 = fromHex(c: input.at(i: i+2).unicode()); |
274 | if ((d1 == -1) || (d0 == -1)) |
275 | goto error; |
276 | |
277 | b = (d1 << 4) | d0; |
278 | if ((b & 0xC0) != 0x80) |
279 | goto error; |
280 | |
281 | i += 2; |
282 | uc = (uc << 6) + (b & 0x3f); |
283 | } |
284 | if (uc < min_uc) |
285 | goto error; |
286 | |
287 | if (uc < 0x10000) { |
288 | output.append(c: QChar(uc)); |
289 | } else { |
290 | if (uc > 0x10FFFF) |
291 | goto error; |
292 | |
293 | ushort l = ushort(((uc - 0x10000) & 0x3FF) + 0xDC00); |
294 | ushort h = ushort((((uc - 0x10000) >> 10) & 0x3FF) + 0xD800); |
295 | output.append(c: QChar(h)); |
296 | output.append(c: QChar(l)); |
297 | } |
298 | } else { |
299 | if (decodeMode == DecodeNonReserved && b <= 0x40) { |
300 | const char *r = uriReserved; |
301 | while (*r) { |
302 | if (*r == b) |
303 | break; |
304 | ++r; |
305 | } |
306 | if (*r) |
307 | output.append(s: input.midRef(position: start, n: i - start + 1)); |
308 | else |
309 | output.append(c: QChar(b)); |
310 | } else { |
311 | output.append(c: QChar(b)); |
312 | } |
313 | } |
314 | } else { |
315 | output.append(c: ch); |
316 | } |
317 | ++i; |
318 | } |
319 | if (i != length) |
320 | *ok = false; |
321 | return output; |
322 | error: |
323 | *ok = false; |
324 | return QString(); |
325 | } |
326 | |
327 | DEFINE_OBJECT_VTABLE(EvalFunction); |
328 | |
329 | void Heap::EvalFunction::init(QV4::ExecutionContext *scope) |
330 | { |
331 | Scope s(scope); |
332 | Heap::FunctionObject::init(scope, name: s.engine->id_eval()); |
333 | ScopedFunctionObject f(s, this); |
334 | f->defineReadonlyConfigurableProperty(name: s.engine->id_length(), value: Value::fromInt32(i: 1)); |
335 | } |
336 | |
337 | ReturnedValue EvalFunction::evalCall(const Value *, const Value *argv, int argc, bool directCall) const |
338 | { |
339 | if (argc < 1) |
340 | return Encode::undefined(); |
341 | |
342 | ExecutionEngine *v4 = engine(); |
343 | bool isStrict = v4->currentStackFrame->v4Function->isStrict(); |
344 | |
345 | Scope scope(v4); |
346 | ScopedContext ctx(scope, v4->currentContext()); |
347 | |
348 | if (!directCall) { |
349 | // the context for eval should be the global scope |
350 | ctx = v4->scriptContext(); |
351 | } |
352 | |
353 | String *scode = argv[0].stringValue(); |
354 | if (!scode) |
355 | return argv[0].asReturnedValue(); |
356 | |
357 | const QString code = scode->toQString(); |
358 | bool inheritContext = !isStrict; |
359 | |
360 | Script script(ctx, QV4::Compiler::ContextType::Eval, code, QStringLiteral("eval code" )); |
361 | script.strictMode = (directCall && isStrict); |
362 | script.inheritContext = inheritContext; |
363 | script.parse(); |
364 | if (v4->hasException) |
365 | return Encode::undefined(); |
366 | |
367 | Function *function = script.function(); |
368 | if (!function) |
369 | return Encode::undefined(); |
370 | function->isEval = true; |
371 | |
372 | if (function->isStrict() || isStrict) { |
373 | ScopedFunctionObject e(scope, FunctionObject::createScriptFunction(scope: ctx, function)); |
374 | ScopedValue thisObject(scope, directCall ? scope.engine->currentStackFrame->thisObject() : scope.engine->globalObject->asReturnedValue()); |
375 | return checkedResult(v4, result: e->call(thisObject, argv: nullptr, argc: 0)); |
376 | } |
377 | |
378 | ScopedValue thisObject(scope, scope.engine->currentStackFrame->thisObject()); |
379 | |
380 | return checkedResult(v4, result: function->call(thisObject, argv: nullptr, argc: 0, context: ctx)); |
381 | } |
382 | |
383 | |
384 | ReturnedValue EvalFunction::virtualCall(const FunctionObject *f, const Value *thisObject, const Value *argv, int argc) |
385 | { |
386 | // indirect call |
387 | return static_cast<const EvalFunction *>(f)->evalCall(thisObject, argv, argc, directCall: false); |
388 | } |
389 | |
390 | |
391 | static inline int toInt(const QChar &qc, int R) |
392 | { |
393 | ushort c = qc.unicode(); |
394 | int v = -1; |
395 | if (c >= '0' && c <= '9') |
396 | v = c - '0'; |
397 | else if (c >= 'A' && c <= 'Z') |
398 | v = c - 'A' + 10; |
399 | else if (c >= 'a' && c <= 'z') |
400 | v = c - 'a' + 10; |
401 | if (v >= 0 && v < R) |
402 | return v; |
403 | else |
404 | return -1; |
405 | } |
406 | |
407 | // parseInt [15.1.2.2] |
408 | ReturnedValue GlobalFunctions::method_parseInt(const FunctionObject *b, const Value *, const Value *argv, int argc) |
409 | { |
410 | Scope scope(b); |
411 | ScopedValue inputString(scope, argc ? argv[0] : Value::undefinedValue()); |
412 | ScopedValue radix(scope, argc > 1 ? argv[1] : Value::undefinedValue()); |
413 | int R = radix->isUndefined() ? 0 : radix->toInt32(); |
414 | |
415 | // [15.1.2.2] step by step: |
416 | QString trimmed = inputString->toQString().trimmed(); // 1 + 2 |
417 | CHECK_EXCEPTION(); |
418 | |
419 | const QChar *pos = trimmed.constData(); |
420 | const QChar *end = pos + trimmed.length(); |
421 | |
422 | int sign = 1; // 3 |
423 | if (pos != end) { |
424 | if (*pos == QLatin1Char('-')) |
425 | sign = -1; // 4 |
426 | if (*pos == QLatin1Char('-') || *pos == QLatin1Char('+')) |
427 | ++pos; // 5 |
428 | } |
429 | bool stripPrefix = true; // 7 |
430 | if (R) { // 8 |
431 | if (R < 2 || R > 36) |
432 | RETURN_RESULT(Encode(std::numeric_limits<double>::quiet_NaN())); // 8a |
433 | if (R != 16) |
434 | stripPrefix = false; // 8b |
435 | } else { // 9 |
436 | R = 10; // 9a |
437 | } |
438 | if (stripPrefix) { // 10 |
439 | if ((end - pos >= 2) |
440 | && (pos[0] == QLatin1Char('0')) |
441 | && (pos[1] == QLatin1Char('x') || pos[1] == QLatin1Char('X'))) { // 10a |
442 | pos += 2; |
443 | R = 16; |
444 | } |
445 | } |
446 | // 11: Z is progressively built below |
447 | // 13: this is handled by the toInt function |
448 | if (pos == end) // 12 |
449 | RETURN_RESULT(Encode(std::numeric_limits<double>::quiet_NaN())); |
450 | bool overflow = false; |
451 | qint64 v_overflow = 0; |
452 | unsigned overflow_digit_count = 0; |
453 | int d = toInt(qc: *pos++, R); |
454 | if (d == -1) |
455 | RETURN_RESULT(Encode(std::numeric_limits<double>::quiet_NaN())); |
456 | qint64 v = d; |
457 | while (pos != end) { |
458 | d = toInt(qc: *pos++, R); |
459 | if (d == -1) |
460 | break; |
461 | if (overflow) { |
462 | if (overflow_digit_count == 0) { |
463 | v_overflow = v; |
464 | v = 0; |
465 | } |
466 | ++overflow_digit_count; |
467 | v = v * R + d; |
468 | } else { |
469 | qint64 vNew = v * R + d; |
470 | if (vNew < v) { |
471 | overflow = true; |
472 | --pos; |
473 | } else { |
474 | v = vNew; |
475 | } |
476 | } |
477 | } |
478 | |
479 | if (overflow) { |
480 | double result = (double) v_overflow * pow(x: static_cast<double>(R), y: static_cast<double>(overflow_digit_count)); |
481 | result += v; |
482 | RETURN_RESULT(Encode(sign * result)); |
483 | } else { |
484 | RETURN_RESULT(Encode(sign * (double) v)); // 15 |
485 | } |
486 | } |
487 | |
488 | // parseFloat [15.1.2.3] |
489 | ReturnedValue GlobalFunctions::method_parseFloat(const FunctionObject *b, const Value *, const Value *argv, int argc) |
490 | { |
491 | Scope scope(b); |
492 | // [15.1.2.3] step by step: |
493 | ScopedString inputString(scope, argc ? argv[0] : Value::undefinedValue(), ScopedString::Convert); |
494 | CHECK_EXCEPTION(); |
495 | |
496 | QString trimmed = inputString->toQString().trimmed(); // 2 |
497 | |
498 | // 4: |
499 | if (trimmed.startsWith(s: QLatin1String("Infinity" )) |
500 | || trimmed.startsWith(s: QLatin1String("+Infinity" ))) |
501 | RETURN_RESULT(Encode(Q_INFINITY)); |
502 | if (trimmed.startsWith(s: QLatin1String("-Infinity" ))) |
503 | RETURN_RESULT(Encode(-Q_INFINITY)); |
504 | QByteArray ba = trimmed.toLatin1(); |
505 | bool ok; |
506 | const char *begin = ba.constData(); |
507 | const char *end = nullptr; |
508 | double d = qstrtod(s00: begin, se: &end, ok: &ok); |
509 | if (end - begin == 0) |
510 | RETURN_RESULT(Encode(std::numeric_limits<double>::quiet_NaN())); // 3 |
511 | else |
512 | RETURN_RESULT(Encode(d)); |
513 | } |
514 | |
515 | /// isNaN [15.1.2.4] |
516 | ReturnedValue GlobalFunctions::method_isNaN(const FunctionObject *, const Value *, const Value *argv, int argc) |
517 | { |
518 | if (!argc) |
519 | // undefined gets converted to NaN |
520 | RETURN_RESULT(Encode(true)); |
521 | |
522 | if (argv[0].integerCompatible()) |
523 | RETURN_RESULT(Encode(false)); |
524 | |
525 | double d = argv[0].toNumber(); |
526 | RETURN_RESULT(Encode((bool)std::isnan(d))); |
527 | } |
528 | |
529 | /// isFinite [15.1.2.5] |
530 | ReturnedValue GlobalFunctions::method_isFinite(const FunctionObject *, const Value *, const Value *argv, int argc) |
531 | { |
532 | if (!argc) |
533 | // undefined gets converted to NaN |
534 | RETURN_RESULT(Encode(false)); |
535 | |
536 | if (argv[0].integerCompatible()) |
537 | RETURN_RESULT(Encode(true)); |
538 | |
539 | double d = argv[0].toNumber(); |
540 | RETURN_RESULT(Encode((bool)std::isfinite(d))); |
541 | } |
542 | |
543 | /// decodeURI [15.1.3.1] |
544 | ReturnedValue GlobalFunctions::method_decodeURI(const FunctionObject *b, const Value *, const Value *argv, int argc) |
545 | { |
546 | if (argc == 0) |
547 | RETURN_UNDEFINED(); |
548 | |
549 | ExecutionEngine *v4 = b->engine(); |
550 | QString uriString = argv[0].toQString(); |
551 | bool ok; |
552 | QString out = decode(input: uriString, decodeMode: DecodeNonReserved, ok: &ok); |
553 | if (!ok) { |
554 | Scope scope(v4); |
555 | ScopedString s(scope, scope.engine->newString(QStringLiteral("malformed URI sequence" ))); |
556 | RETURN_RESULT(scope.engine->throwURIError(s)); |
557 | } |
558 | |
559 | RETURN_RESULT(v4->newString(out)); |
560 | } |
561 | |
562 | /// decodeURIComponent [15.1.3.2] |
563 | ReturnedValue GlobalFunctions::method_decodeURIComponent(const FunctionObject *b, const Value *, const Value *argv, int argc) |
564 | { |
565 | if (argc == 0) |
566 | RETURN_UNDEFINED(); |
567 | |
568 | ExecutionEngine *v4 = b->engine(); |
569 | QString uriString = argv[0].toQString(); |
570 | bool ok; |
571 | QString out = decode(input: uriString, decodeMode: DecodeAll, ok: &ok); |
572 | if (!ok) { |
573 | Scope scope(v4); |
574 | ScopedString s(scope, scope.engine->newString(QStringLiteral("malformed URI sequence" ))); |
575 | RETURN_RESULT(scope.engine->throwURIError(s)); |
576 | } |
577 | |
578 | RETURN_RESULT(v4->newString(out)); |
579 | } |
580 | |
581 | /// encodeURI [15.1.3.3] |
582 | ReturnedValue GlobalFunctions::method_encodeURI(const FunctionObject *b, const Value *, const Value *argv, int argc) |
583 | { |
584 | if (argc == 0) |
585 | RETURN_UNDEFINED(); |
586 | |
587 | ExecutionEngine *v4 = b->engine(); |
588 | QString uriString = argv[0].toQString(); |
589 | bool ok; |
590 | QString out = encode(input: uriString, unescapedSet: uriUnescapedReserved, ok: &ok); |
591 | if (!ok) { |
592 | Scope scope(v4); |
593 | ScopedString s(scope, scope.engine->newString(QStringLiteral("malformed URI sequence" ))); |
594 | RETURN_RESULT(scope.engine->throwURIError(s)); |
595 | } |
596 | |
597 | RETURN_RESULT(v4->newString(out)); |
598 | } |
599 | |
600 | /// encodeURIComponent [15.1.3.4] |
601 | ReturnedValue GlobalFunctions::method_encodeURIComponent(const FunctionObject *b, const Value *, const Value *argv, int argc) |
602 | { |
603 | if (argc == 0) |
604 | RETURN_UNDEFINED(); |
605 | |
606 | ExecutionEngine *v4 = b->engine(); |
607 | QString uriString = argv[0].toQString(); |
608 | bool ok; |
609 | QString out = encode(input: uriString, unescapedSet: uriUnescaped, ok: &ok); |
610 | if (!ok) { |
611 | Scope scope(v4); |
612 | ScopedString s(scope, scope.engine->newString(QStringLiteral("malformed URI sequence" ))); |
613 | RETURN_RESULT(scope.engine->throwURIError(s)); |
614 | } |
615 | |
616 | RETURN_RESULT(v4->newString(out)); |
617 | } |
618 | |
619 | ReturnedValue GlobalFunctions::method_escape(const FunctionObject *b, const Value *, const Value *argv, int argc) |
620 | { |
621 | ExecutionEngine *v4 = b->engine(); |
622 | if (!argc) |
623 | RETURN_RESULT(v4->newString(QStringLiteral("undefined" ))); |
624 | |
625 | QString str = argv[0].toQString(); |
626 | RETURN_RESULT(v4->newString(escape(str))); |
627 | } |
628 | |
629 | ReturnedValue GlobalFunctions::method_unescape(const FunctionObject *b, const Value *, const Value *argv, int argc) |
630 | { |
631 | ExecutionEngine *v4 = b->engine(); |
632 | if (!argc) |
633 | RETURN_RESULT(v4->newString(QStringLiteral("undefined" ))); |
634 | |
635 | QString str = argv[0].toQString(); |
636 | RETURN_RESULT(v4->newString(unescape(str))); |
637 | } |
638 | |