other-licenses/7zstub/src/7zip/Archive/Common/CoderMixer2.cpp@97036ab72558 (annotated)
other-licenses/7zstub/src/7zip/Archive/Common/CoderMixer2.cpp
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | // CoderMixer2.cpp |
| michael@0 | 2 | |
| michael@0 | 3 | #include "StdAfx.h" |
| michael@0 | 4 | |
| michael@0 | 5 | #include "CoderMixer2.h" |
| michael@0 | 6 | |
| michael@0 | 7 | namespace NCoderMixer2 { |
| michael@0 | 8 | |
| michael@0 | 9 | CBindReverseConverter::CBindReverseConverter(const CBindInfo &srcBindInfo): |
| michael@0 | 10 | _srcBindInfo(srcBindInfo) |
| michael@0 | 11 | { |
| michael@0 | 12 | srcBindInfo.GetNumStreams(NumSrcInStreams, _numSrcOutStreams); |
| michael@0 | 13 | |
| michael@0 | 14 | UInt32 j; |
| michael@0 | 15 | for (j = 0; j < NumSrcInStreams; j++) |
| michael@0 | 16 | { |
| michael@0 | 17 | _srcInToDestOutMap.Add(0); |
| michael@0 | 18 | DestOutToSrcInMap.Add(0); |
| michael@0 | 19 | } |
| michael@0 | 20 | for (j = 0; j < _numSrcOutStreams; j++) |
| michael@0 | 21 | { |
| michael@0 | 22 | _srcOutToDestInMap.Add(0); |
| michael@0 | 23 | _destInToSrcOutMap.Add(0); |
| michael@0 | 24 | } |
| michael@0 | 25 | |
| michael@0 | 26 | UInt32 destInOffset = 0; |
| michael@0 | 27 | UInt32 destOutOffset = 0; |
| michael@0 | 28 | UInt32 srcInOffset = NumSrcInStreams; |
| michael@0 | 29 | UInt32 srcOutOffset = _numSrcOutStreams; |
| michael@0 | 30 | |
| michael@0 | 31 | for (int i = srcBindInfo.Coders.Size() - 1; i >= 0; i--) |
| michael@0 | 32 | { |
| michael@0 | 33 | const CCoderStreamsInfo &srcCoderInfo = srcBindInfo.Coders[i]; |
| michael@0 | 34 | |
| michael@0 | 35 | srcInOffset -= srcCoderInfo.NumInStreams; |
| michael@0 | 36 | srcOutOffset -= srcCoderInfo.NumOutStreams; |
| michael@0 | 37 | |
| michael@0 | 38 | UInt32 j; |
| michael@0 | 39 | for (j = 0; j < srcCoderInfo.NumInStreams; j++, destOutOffset++) |
| michael@0 | 40 | { |
| michael@0 | 41 | UInt32 index = srcInOffset + j; |
| michael@0 | 42 | _srcInToDestOutMap[index] = destOutOffset; |
| michael@0 | 43 | DestOutToSrcInMap[destOutOffset] = index; |
| michael@0 | 44 | } |
| michael@0 | 45 | for (j = 0; j < srcCoderInfo.NumOutStreams; j++, destInOffset++) |
| michael@0 | 46 | { |
| michael@0 | 47 | UInt32 index = srcOutOffset + j; |
| michael@0 | 48 | _srcOutToDestInMap[index] = destInOffset; |
| michael@0 | 49 | _destInToSrcOutMap[destInOffset] = index; |
| michael@0 | 50 | } |
| michael@0 | 51 | } |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | void CBindReverseConverter::CreateReverseBindInfo(CBindInfo &destBindInfo) |
| michael@0 | 55 | { |
| michael@0 | 56 | destBindInfo.Coders.Clear(); |
| michael@0 | 57 | destBindInfo.BindPairs.Clear(); |
| michael@0 | 58 | destBindInfo.InStreams.Clear(); |
| michael@0 | 59 | destBindInfo.OutStreams.Clear(); |
| michael@0 | 60 | |
| michael@0 | 61 | int i; |
| michael@0 | 62 | for (i = _srcBindInfo.Coders.Size() - 1; i >= 0; i--) |
| michael@0 | 63 | { |
| michael@0 | 64 | const CCoderStreamsInfo &srcCoderInfo = _srcBindInfo.Coders[i]; |
| michael@0 | 65 | CCoderStreamsInfo destCoderInfo; |
| michael@0 | 66 | destCoderInfo.NumInStreams = srcCoderInfo.NumOutStreams; |
| michael@0 | 67 | destCoderInfo.NumOutStreams = srcCoderInfo.NumInStreams; |
| michael@0 | 68 | destBindInfo.Coders.Add(destCoderInfo); |
| michael@0 | 69 | } |
| michael@0 | 70 | for (i = _srcBindInfo.BindPairs.Size() - 1; i >= 0; i--) |
| michael@0 | 71 | { |
| michael@0 | 72 | const CBindPair &srcBindPair = _srcBindInfo.BindPairs[i]; |
| michael@0 | 73 | CBindPair destBindPair; |
| michael@0 | 74 | destBindPair.InIndex = _srcOutToDestInMap[srcBindPair.OutIndex]; |
| michael@0 | 75 | destBindPair.OutIndex = _srcInToDestOutMap[srcBindPair.InIndex]; |
| michael@0 | 76 | destBindInfo.BindPairs.Add(destBindPair); |
| michael@0 | 77 | } |
| michael@0 | 78 | for (i = 0; i < _srcBindInfo.InStreams.Size(); i++) |
| michael@0 | 79 | destBindInfo.OutStreams.Add(_srcInToDestOutMap[_srcBindInfo.InStreams[i]]); |
| michael@0 | 80 | for (i = 0; i < _srcBindInfo.OutStreams.Size(); i++) |
| michael@0 | 81 | destBindInfo.InStreams.Add(_srcOutToDestInMap[_srcBindInfo.OutStreams[i]]); |
| michael@0 | 82 | } |
| michael@0 | 83 | |
| michael@0 | 84 | CCoderInfo::CCoderInfo(UInt32 numInStreams, UInt32 numOutStreams): |
| michael@0 | 85 | NumInStreams(numInStreams), |
| michael@0 | 86 | NumOutStreams(numOutStreams) |
| michael@0 | 87 | { |
| michael@0 | 88 | InSizes.Reserve(NumInStreams); |
| michael@0 | 89 | InSizePointers.Reserve(NumInStreams); |
| michael@0 | 90 | OutSizePointers.Reserve(NumOutStreams); |
| michael@0 | 91 | OutSizePointers.Reserve(NumOutStreams); |
| michael@0 | 92 | } |
| michael@0 | 93 | |
| michael@0 | 94 | static void SetSizes(const UInt64 **srcSizes, CRecordVector<UInt64> &sizes, |
| michael@0 | 95 | CRecordVector<const UInt64 *> &sizePointers, UInt32 numItems) |
| michael@0 | 96 | { |
| michael@0 | 97 | sizes.Clear(); |
| michael@0 | 98 | sizePointers.Clear(); |
| michael@0 | 99 | for(UInt32 i = 0; i < numItems; i++) |
| michael@0 | 100 | { |
| michael@0 | 101 | if (srcSizes == 0 || srcSizes[i] == NULL) |
| michael@0 | 102 | { |
| michael@0 | 103 | sizes.Add(0); |
| michael@0 | 104 | sizePointers.Add(NULL); |
| michael@0 | 105 | } |
| michael@0 | 106 | else |
| michael@0 | 107 | { |
| michael@0 | 108 | sizes.Add(*srcSizes[i]); |
| michael@0 | 109 | sizePointers.Add(&sizes.Back()); |
| michael@0 | 110 | } |
| michael@0 | 111 | } |
| michael@0 | 112 | } |
| michael@0 | 113 | |
| michael@0 | 114 | void CCoderInfo::SetCoderInfo(const UInt64 **inSizes, |
| michael@0 | 115 | const UInt64 **outSizes) |
| michael@0 | 116 | { |
| michael@0 | 117 | SetSizes(inSizes, InSizes, InSizePointers, NumInStreams); |
| michael@0 | 118 | SetSizes(outSizes, OutSizes, OutSizePointers, NumOutStreams); |
| michael@0 | 119 | } |
| michael@0 | 120 | |
| michael@0 | 121 | } |
