1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Mozilla Communicator client code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Original Author: David W. Hyatt (hyatt@netscape.com)
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either of the GNU General Public License Version 2 or later (the "GPL"),
27 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
31 : * use your version of this file under the terms of the MPL, indicate your
32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #include "nsRuleData.h"
40 : #include "nsCSSProps.h"
41 : #include "nsPresArena.h"
42 :
43 : inline size_t
44 0 : nsRuleData::GetPoisonOffset()
45 : {
46 : // Fill in mValueOffsets such that mValueStorage + mValueOffsets[i]
47 : // will yield the frame poison value for all uninitialized value
48 : // offsets.
49 : MOZ_STATIC_ASSERT(sizeof(PRUword) == sizeof(size_t),
50 : "expect PRUword and size_t to be the same size");
51 : MOZ_STATIC_ASSERT(PRUword(-1) > PRUword(0),
52 : "expect PRUword to be unsigned");
53 : MOZ_STATIC_ASSERT(size_t(-1) > size_t(0),
54 : "expect size_t to be unsigned");
55 0 : PRUword framePoisonValue = nsPresArena::GetPoisonValue();
56 : return size_t(framePoisonValue - PRUword(mValueStorage)) /
57 0 : sizeof(nsCSSValue);
58 : }
59 :
60 0 : nsRuleData::nsRuleData(PRUint32 aSIDs, nsCSSValue* aValueStorage,
61 : nsPresContext* aContext, nsStyleContext* aStyleContext)
62 : : mSIDs(aSIDs),
63 : mCanStoreInRuleTree(true),
64 : mPresContext(aContext),
65 : mStyleContext(aStyleContext),
66 : mPostResolveCallback(nsnull),
67 0 : mValueStorage(aValueStorage)
68 : {
69 : #ifndef MOZ_VALGRIND
70 0 : size_t framePoisonOffset = GetPoisonOffset();
71 0 : for (size_t i = 0; i < nsStyleStructID_Length; ++i) {
72 0 : mValueOffsets[i] = framePoisonOffset;
73 : }
74 : #endif
75 0 : }
76 :
77 : #ifdef DEBUG
78 0 : nsRuleData::~nsRuleData()
79 : {
80 : #ifndef MOZ_VALGRIND
81 : // assert nothing in mSIDs has poison value
82 0 : size_t framePoisonOffset = GetPoisonOffset();
83 0 : for (size_t i = 0; i < nsStyleStructID_Length; ++i) {
84 0 : NS_ABORT_IF_FALSE(!(mSIDs & (1 << i)) ||
85 : mValueOffsets[i] != framePoisonOffset,
86 : "value in SIDs was left with poison offset");
87 : }
88 : #endif
89 0 : }
90 : #endif
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