The Tor Browser / file comparison
comparison: js/src/jsatominlines.h
js/src/jsatominlines.h
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| -1:000000000000 | 0:8eca5ee69e85 |
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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 #ifndef jsatominlines_h | |
| 8 #define jsatominlines_h | |
| 9 | |
| 10 #include "jsatom.h" | |
| 11 | |
| 12 #include "mozilla/PodOperations.h" | |
| 13 #include "mozilla/RangedPtr.h" | |
| 14 | |
| 15 #include "jscntxt.h" | |
| 16 #include "jsnum.h" | |
| 17 | |
| 18 #include "vm/String.h" | |
| 19 | |
| 20 inline JSAtom * | |
| 21 js::AtomStateEntry::asPtr() const | |
| 22 { | |
| 23 JS_ASSERT(bits != 0); | |
| 24 JSAtom *atom = reinterpret_cast<JSAtom *>(bits & NO_TAG_MASK); | |
| 25 JSString::readBarrier(atom); | |
| 26 return atom; | |
| 27 } | |
| 28 | |
| 29 namespace js { | |
| 30 | |
| 31 inline jsid | |
| 32 AtomToId(JSAtom *atom) | |
| 33 { | |
| 34 JS_STATIC_ASSERT(JSID_INT_MIN == 0); | |
| 35 | |
| 36 uint32_t index; | |
| 37 if (atom->isIndex(&index) && index <= JSID_INT_MAX) | |
| 38 return INT_TO_JSID(int32_t(index)); | |
| 39 | |
| 40 return JSID_FROM_BITS(size_t(atom)); | |
| 41 } | |
| 42 | |
| 43 inline bool | |
| 44 ValueToIdPure(const Value &v, jsid *id) | |
| 45 { | |
| 46 int32_t i; | |
| 47 if (ValueFitsInInt32(v, &i) && INT_FITS_IN_JSID(i)) { | |
| 48 *id = INT_TO_JSID(i); | |
| 49 return true; | |
| 50 } | |
| 51 | |
| 52 if (!v.isString() || !v.toString()->isAtom()) | |
| 53 return false; | |
| 54 | |
| 55 *id = AtomToId(&v.toString()->asAtom()); | |
| 56 return true; | |
| 57 } | |
| 58 | |
| 59 template <AllowGC allowGC> | |
| 60 inline bool | |
| 61 ValueToId(JSContext* cx, typename MaybeRooted<Value, allowGC>::HandleType v, | |
| 62 typename MaybeRooted<jsid, allowGC>::MutableHandleType idp) | |
| 63 { | |
| 64 int32_t i; | |
| 65 if (ValueFitsInInt32(v, &i) && INT_FITS_IN_JSID(i)) { | |
| 66 idp.set(INT_TO_JSID(i)); | |
| 67 return true; | |
| 68 } | |
| 69 | |
| 70 JSAtom *atom = ToAtom<allowGC>(cx, v); | |
| 71 if (!atom) | |
| 72 return false; | |
| 73 | |
| 74 idp.set(AtomToId(atom)); | |
| 75 return true; | |
| 76 } | |
| 77 | |
| 78 /* | |
| 79 * Write out character representing |index| to the memory just before |end|. | |
| 80 * Thus |*end| is not touched, but |end[-1]| and earlier are modified as | |
| 81 * appropriate. There must be at least js::UINT32_CHAR_BUFFER_LENGTH elements | |
| 82 * before |end| to avoid buffer underflow. The start of the characters written | |
| 83 * is returned and is necessarily before |end|. | |
| 84 */ | |
| 85 template <typename T> | |
| 86 inline mozilla::RangedPtr<T> | |
| 87 BackfillIndexInCharBuffer(uint32_t index, mozilla::RangedPtr<T> end) | |
| 88 { | |
| 89 #ifdef DEBUG | |
| 90 /* | |
| 91 * Assert that the buffer we're filling will hold as many characters as we | |
| 92 * could write out, by dereferencing the index that would hold the most | |
| 93 * significant digit. | |
| 94 */ | |
| 95 (void) *(end - UINT32_CHAR_BUFFER_LENGTH); | |
| 96 #endif | |
| 97 | |
| 98 do { | |
| 99 uint32_t next = index / 10, digit = index % 10; | |
| 100 *--end = '0' + digit; | |
| 101 index = next; | |
| 102 } while (index > 0); | |
| 103 | |
| 104 return end; | |
| 105 } | |
| 106 | |
| 107 bool | |
| 108 IndexToIdSlow(ExclusiveContext *cx, uint32_t index, MutableHandleId idp); | |
| 109 | |
| 110 inline bool | |
| 111 IndexToId(ExclusiveContext *cx, uint32_t index, MutableHandleId idp) | |
| 112 { | |
| 113 if (index <= JSID_INT_MAX) { | |
| 114 idp.set(INT_TO_JSID(index)); | |
| 115 return true; | |
| 116 } | |
| 117 | |
| 118 return IndexToIdSlow(cx, index, idp); | |
| 119 } | |
| 120 | |
| 121 static MOZ_ALWAYS_INLINE JSFlatString * | |
| 122 IdToString(JSContext *cx, jsid id) | |
| 123 { | |
| 124 if (JSID_IS_STRING(id)) | |
| 125 return JSID_TO_ATOM(id); | |
| 126 | |
| 127 if (MOZ_LIKELY(JSID_IS_INT(id))) | |
| 128 return Int32ToString<CanGC>(cx, JSID_TO_INT(id)); | |
| 129 | |
| 130 RootedValue idv(cx, IdToValue(id)); | |
| 131 JSString *str = ToStringSlow<CanGC>(cx, idv); | |
| 132 if (!str) | |
| 133 return nullptr; | |
| 134 | |
| 135 return str->ensureFlat(cx); | |
| 136 } | |
| 137 | |
| 138 inline | |
| 139 AtomHasher::Lookup::Lookup(const JSAtom *atom) | |
| 140 : chars(atom->chars()), length(atom->length()), atom(atom) | |
| 141 { | |
| 142 hash = mozilla::HashString(chars, length); | |
| 143 } | |
| 144 | |
| 145 inline bool | |
| 146 AtomHasher::match(const AtomStateEntry &entry, const Lookup &lookup) | |
| 147 { | |
| 148 JSAtom *key = entry.asPtr(); | |
| 149 if (lookup.atom) | |
| 150 return lookup.atom == key; | |
| 151 if (key->length() != lookup.length) | |
| 152 return false; | |
| 153 return mozilla::PodEqual(key->chars(), lookup.chars, lookup.length); | |
| 154 } | |
| 155 | |
| 156 inline Handle<PropertyName*> | |
| 157 TypeName(JSType type, const JSAtomState &names) | |
| 158 { | |
| 159 JS_ASSERT(type < JSTYPE_LIMIT); | |
| 160 JS_STATIC_ASSERT(offsetof(JSAtomState, undefined) + | |
| 161 JSTYPE_LIMIT * sizeof(FixedHeapPtr<PropertyName>) <= | |
| 162 sizeof(JSAtomState)); | |
| 163 JS_STATIC_ASSERT(JSTYPE_VOID == 0); | |
| 164 return (&names.undefined)[type]; | |
| 165 } | |
| 166 | |
| 167 inline Handle<PropertyName*> | |
| 168 ClassName(JSProtoKey key, JSAtomState &atomState) | |
| 169 { | |
| 170 JS_ASSERT(key < JSProto_LIMIT); | |
| 171 JS_STATIC_ASSERT(offsetof(JSAtomState, Null) + | |
| 172 JSProto_LIMIT * sizeof(FixedHeapPtr<PropertyName>) <= | |
| 173 sizeof(JSAtomState)); | |
| 174 JS_STATIC_ASSERT(JSProto_Null == 0); | |
| 175 return (&atomState.Null)[key]; | |
| 176 } | |
| 177 | |
| 178 inline Handle<PropertyName*> | |
| 179 ClassName(JSProtoKey key, JSRuntime *rt) | |
| 180 { | |
| 181 return ClassName(key, *rt->commonNames); | |
| 182 } | |
| 183 | |
| 184 inline Handle<PropertyName*> | |
| 185 ClassName(JSProtoKey key, ExclusiveContext *cx) | |
| 186 { | |
| 187 return ClassName(key, cx->names()); | |
| 188 } | |
| 189 | |
| 190 } // namespace js | |
| 191 | |
| 192 #endif /* jsatominlines_h */ |
