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js/src/jsarray.h@a63d609f5ebe (annotated)

js/src/jsarray.h

Thu, 15 Jan 2015 15:55:04 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Thu, 15 Jan 2015 15:55:04 +0100
branch
TOR_BUG_9701
changeset 9
a63d609f5ebe
permissions
-rw-r--r--

Back out 97036ab72558 which inappropriately compared turds to third parties.

michael@0 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0 2 * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0 3 * This Source Code Form is subject to the terms of the Mozilla Public
michael@0 4 * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0 6
michael@0 7 /* JS Array interface. */
michael@0 8
michael@0 9 #ifndef jsarray_h
michael@0 10 #define jsarray_h
michael@0 11
michael@0 12 #include "jsobj.h"
michael@0 13 #include "jspubtd.h"
michael@0 14
michael@0 15 namespace js {
michael@0 16 /* 2^32-2, inclusive */
michael@0 17 const uint32_t MAX_ARRAY_INDEX = 4294967294u;
michael@0 18 }
michael@0 19
michael@0 20 inline bool
michael@0 21 js_IdIsIndex(jsid id, uint32_t *indexp)
michael@0 22 {
michael@0 23 if (JSID_IS_INT(id)) {
michael@0 24 int32_t i = JSID_TO_INT(id);
michael@0 25 JS_ASSERT(i >= 0);
michael@0 26 *indexp = (uint32_t)i;
michael@0 27 return true;
michael@0 28 }
michael@0 29
michael@0 30 if (MOZ_UNLIKELY(!JSID_IS_STRING(id)))
michael@0 31 return false;
michael@0 32
michael@0 33 return js::StringIsArrayIndex(JSID_TO_ATOM(id), indexp);
michael@0 34 }
michael@0 35
michael@0 36 extern JSObject *
michael@0 37 js_InitArrayClass(JSContext *cx, js::HandleObject obj);
michael@0 38
michael@0 39 extern bool
michael@0 40 js_InitContextBusyArrayTable(JSContext *cx);
michael@0 41
michael@0 42 namespace js {
michael@0 43
michael@0 44 class ArrayObject;
michael@0 45
michael@0 46 /* Create a dense array with no capacity allocated, length set to 0. */
michael@0 47 extern ArrayObject * JS_FASTCALL
michael@0 48 NewDenseEmptyArray(JSContext *cx, JSObject *proto = nullptr,
michael@0 49 NewObjectKind newKind = GenericObject);
michael@0 50
michael@0 51 /* Create a dense array with length and capacity == 'length', initialized length set to 0. */
michael@0 52 extern ArrayObject * JS_FASTCALL
michael@0 53 NewDenseAllocatedArray(ExclusiveContext *cx, uint32_t length, JSObject *proto = nullptr,
michael@0 54 NewObjectKind newKind = GenericObject);
michael@0 55
michael@0 56 /*
michael@0 57 * Create a dense array with a set length, but without allocating space for the
michael@0 58 * contents. This is useful, e.g., when accepting length from the user.
michael@0 59 */
michael@0 60 extern ArrayObject * JS_FASTCALL
michael@0 61 NewDenseUnallocatedArray(ExclusiveContext *cx, uint32_t length, JSObject *proto = nullptr,
michael@0 62 NewObjectKind newKind = GenericObject);
michael@0 63
michael@0 64 /* Create a dense array with a copy of the dense array elements in src. */
michael@0 65 extern ArrayObject *
michael@0 66 NewDenseCopiedArray(JSContext *cx, uint32_t length, HandleObject src, uint32_t elementOffset, JSObject *proto = nullptr);
michael@0 67
michael@0 68 /* Create a dense array from the given array values, which must be rooted */
michael@0 69 extern ArrayObject *
michael@0 70 NewDenseCopiedArray(JSContext *cx, uint32_t length, const Value *values, JSObject *proto = nullptr,
michael@0 71 NewObjectKind newKind = GenericObject);
michael@0 72
michael@0 73 /* Create a dense array based on templateObject with the given length. */
michael@0 74 extern ArrayObject *
michael@0 75 NewDenseAllocatedArrayWithTemplate(JSContext *cx, uint32_t length, JSObject *templateObject);
michael@0 76
michael@0 77 /*
michael@0 78 * Determines whether a write to the given element on |obj| should fail because
michael@0 79 * |obj| is an Array with a non-writable length, and writing that element would
michael@0 80 * increase the length of the array.
michael@0 81 */
michael@0 82 extern bool
michael@0 83 WouldDefinePastNonwritableLength(ThreadSafeContext *cx,
michael@0 84 HandleObject obj, uint32_t index, bool strict,
michael@0 85 bool *definesPast);
michael@0 86
michael@0 87 /*
michael@0 88 * Canonicalize |vp| to a uint32_t value potentially suitable for use as an
michael@0 89 * array length.
michael@0 90 *
michael@0 91 * For parallel execution we can only canonicalize non-object values.
michael@0 92 */
michael@0 93 template <ExecutionMode mode>
michael@0 94 extern bool
michael@0 95 CanonicalizeArrayLengthValue(typename ExecutionModeTraits<mode>::ContextType cx,
michael@0 96 HandleValue v, uint32_t *canonicalized);
michael@0 97
michael@0 98 extern bool
michael@0 99 GetLengthProperty(JSContext *cx, HandleObject obj, uint32_t *lengthp);
michael@0 100
michael@0 101 extern bool
michael@0 102 SetLengthProperty(JSContext *cx, HandleObject obj, double length);
michael@0 103
michael@0 104 extern bool
michael@0 105 ObjectMayHaveExtraIndexedProperties(JSObject *obj);
michael@0 106
michael@0 107 /*
michael@0 108 * Copy 'length' elements from aobj to vp.
michael@0 109 *
michael@0 110 * This function assumes 'length' is effectively the result of calling
michael@0 111 * js_GetLengthProperty on aobj. vp must point to rooted memory.
michael@0 112 */
michael@0 113 extern bool
michael@0 114 GetElements(JSContext *cx, HandleObject aobj, uint32_t length, js::Value *vp);
michael@0 115
michael@0 116 /* Natives exposed for optimization by the interpreter and JITs. */
michael@0 117
michael@0 118 extern bool
michael@0 119 array_sort(JSContext *cx, unsigned argc, js::Value *vp);
michael@0 120
michael@0 121 extern bool
michael@0 122 array_push(JSContext *cx, unsigned argc, js::Value *vp);
michael@0 123
michael@0 124 extern bool
michael@0 125 array_pop(JSContext *cx, unsigned argc, js::Value *vp);
michael@0 126
michael@0 127 extern bool
michael@0 128 array_splice(JSContext *cx, unsigned argc, js::Value *vp);
michael@0 129
michael@0 130 extern bool
michael@0 131 array_splice_impl(JSContext *cx, unsigned argc, js::Value *vp, bool pop);
michael@0 132
michael@0 133 extern bool
michael@0 134 array_concat(JSContext *cx, unsigned argc, js::Value *vp);
michael@0 135
michael@0 136 extern bool
michael@0 137 array_concat_dense(JSContext *cx, Handle<ArrayObject*> arr1, Handle<ArrayObject*> arr2,
michael@0 138 Handle<ArrayObject*> result);
michael@0 139
michael@0 140 extern void
michael@0 141 ArrayShiftMoveElements(JSObject *obj);
michael@0 142
michael@0 143 extern bool
michael@0 144 array_shift(JSContext *cx, unsigned argc, js::Value *vp);
michael@0 145
michael@0 146 /*
michael@0 147 * Append the given (non-hole) value to the end of an array. The array must be
michael@0 148 * a newborn array -- that is, one which has not been exposed to script for
michael@0 149 * arbitrary manipulation. (This method optimizes on the assumption that
michael@0 150 * extending the array to accommodate the element will never make the array
michael@0 151 * sparse, which requires that the array be completely filled.)
michael@0 152 */
michael@0 153 extern bool
michael@0 154 NewbornArrayPush(JSContext *cx, HandleObject obj, const Value &v);
michael@0 155
michael@0 156 } /* namespace js */
michael@0 157
michael@0 158 #ifdef DEBUG
michael@0 159 extern bool
michael@0 160 js_ArrayInfo(JSContext *cx, unsigned argc, js::Value *vp);
michael@0 161 #endif
michael@0 162
michael@0 163 /* Array constructor native. Exposed only so the JIT can know its address. */
michael@0 164 bool
michael@0 165 js_Array(JSContext *cx, unsigned argc, js::Value *vp);
michael@0 166
michael@0 167 #endif /* jsarray_h */

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