The Tor Browser / file comparison
comparison: js/src/vm/StringBuffer.cpp
js/src/vm/StringBuffer.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:6b265fb3d5a1 |
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "vm/StringBuffer.h" | |
| 8 | |
| 9 #include "jsobjinlines.h" | |
| 10 | |
| 11 #include "vm/String-inl.h" | |
| 12 | |
| 13 using namespace js; | |
| 14 | |
| 15 jschar * | |
| 16 StringBuffer::extractWellSized() | |
| 17 { | |
| 18 size_t capacity = cb.capacity(); | |
| 19 size_t length = cb.length(); | |
| 20 | |
| 21 jschar *buf = cb.extractRawBuffer(); | |
| 22 if (!buf) | |
| 23 return nullptr; | |
| 24 | |
| 25 /* For medium/big buffers, avoid wasting more than 1/4 of the memory. */ | |
| 26 JS_ASSERT(capacity >= length); | |
| 27 if (length > CharBuffer::sMaxInlineStorage && capacity - length > length / 4) { | |
| 28 size_t bytes = sizeof(jschar) * (length + 1); | |
| 29 ExclusiveContext *cx = context(); | |
| 30 jschar *tmp = (jschar *)cx->realloc_(buf, bytes); | |
| 31 if (!tmp) { | |
| 32 js_free(buf); | |
| 33 return nullptr; | |
| 34 } | |
| 35 buf = tmp; | |
| 36 } | |
| 37 | |
| 38 return buf; | |
| 39 } | |
| 40 | |
| 41 JSFlatString * | |
| 42 StringBuffer::finishString() | |
| 43 { | |
| 44 ExclusiveContext *cx = context(); | |
| 45 if (cb.empty()) | |
| 46 return cx->names().empty; | |
| 47 | |
| 48 size_t length = cb.length(); | |
| 49 if (!JSString::validateLength(cx, length)) | |
| 50 return nullptr; | |
| 51 | |
| 52 JS_STATIC_ASSERT(JSFatInlineString::MAX_FAT_INLINE_LENGTH < CharBuffer::InlineLength); | |
| 53 if (JSFatInlineString::lengthFits(length)) | |
| 54 return NewFatInlineString<CanGC>(cx, TwoByteChars(cb.begin(), length)); | |
| 55 | |
| 56 if (!cb.append('\0')) | |
| 57 return nullptr; | |
| 58 | |
| 59 jschar *buf = extractWellSized(); | |
| 60 if (!buf) | |
| 61 return nullptr; | |
| 62 | |
| 63 JSFlatString *str = js_NewString<CanGC>(cx, buf, length); | |
| 64 if (!str) | |
| 65 js_free(buf); | |
| 66 return str; | |
| 67 } | |
| 68 | |
| 69 JSAtom * | |
| 70 StringBuffer::finishAtom() | |
| 71 { | |
| 72 ExclusiveContext *cx = context(); | |
| 73 | |
| 74 size_t length = cb.length(); | |
| 75 if (length == 0) | |
| 76 return cx->names().empty; | |
| 77 | |
| 78 JSAtom *atom = AtomizeChars(cx, cb.begin(), length); | |
| 79 cb.clear(); | |
| 80 return atom; | |
| 81 } | |
| 82 | |
| 83 bool | |
| 84 js::ValueToStringBufferSlow(JSContext *cx, const Value &arg, StringBuffer &sb) | |
| 85 { | |
| 86 RootedValue v(cx, arg); | |
| 87 if (!ToPrimitive(cx, JSTYPE_STRING, &v)) | |
| 88 return false; | |
| 89 | |
| 90 if (v.isString()) | |
| 91 return sb.append(v.toString()); | |
| 92 if (v.isNumber()) | |
| 93 return NumberValueToStringBuffer(cx, v, sb); | |
| 94 if (v.isBoolean()) | |
| 95 return BooleanToStringBuffer(v.toBoolean(), sb); | |
| 96 if (v.isNull()) | |
| 97 return sb.append(cx->names().null); | |
| 98 JS_ASSERT(v.isUndefined()); | |
| 99 return sb.append(cx->names().undefined); | |
| 100 } |
