diff options
Diffstat (limited to 'other-licenses/7zstub/src/CPP/7zip/UI/Common/HashCalc.cpp')
| -rw-r--r-- | other-licenses/7zstub/src/CPP/7zip/UI/Common/HashCalc.cpp | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/CPP/7zip/UI/Common/HashCalc.cpp b/other-licenses/7zstub/src/CPP/7zip/UI/Common/HashCalc.cpp new file mode 100644 index 000000000..9c0a1d0ae --- /dev/null +++ b/other-licenses/7zstub/src/CPP/7zip/UI/Common/HashCalc.cpp @@ -0,0 +1,347 @@ +// HashCalc.cpp
+
+#include "StdAfx.h"
+
+#include "../../../../C/Alloc.h"
+
+#include "../../../Common/StringToInt.h"
+
+#include "../../Common/FileStreams.h"
+#include "../../Common/StreamUtils.h"
+
+#include "EnumDirItems.h"
+#include "HashCalc.h"
+
+using namespace NWindows;
+
+class CHashMidBuf
+{
+ void *_data;
+public:
+ CHashMidBuf(): _data(0) {}
+ operator void *() { return _data; }
+ bool Alloc(size_t size)
+ {
+ if (_data != 0)
+ return false;
+ _data = ::MidAlloc(size);
+ return _data != 0;
+ }
+ ~CHashMidBuf() { ::MidFree(_data); }
+};
+
+static const char * const k_DefaultHashMethod = "CRC32";
+
+HRESULT CHashBundle::SetMethods(DECL_EXTERNAL_CODECS_LOC_VARS const UStringVector &hashMethods)
+{
+ UStringVector names = hashMethods;
+ if (names.IsEmpty())
+ names.Add(UString(k_DefaultHashMethod));
+
+ CRecordVector<CMethodId> ids;
+ CObjectVector<COneMethodInfo> methods;
+
+ unsigned i;
+ for (i = 0; i < names.Size(); i++)
+ {
+ COneMethodInfo m;
+ RINOK(m.ParseMethodFromString(names[i]));
+
+ if (m.MethodName.IsEmpty())
+ m.MethodName = k_DefaultHashMethod;
+
+ if (m.MethodName == "*")
+ {
+ CRecordVector<CMethodId> tempMethods;
+ GetHashMethods(EXTERNAL_CODECS_LOC_VARS tempMethods);
+ methods.Clear();
+ ids.Clear();
+ FOR_VECTOR (t, tempMethods)
+ {
+ unsigned index = ids.AddToUniqueSorted(tempMethods[t]);
+ if (ids.Size() != methods.Size())
+ methods.Insert(index, m);
+ }
+ break;
+ }
+ else
+ {
+ // m.MethodName.RemoveChar(L'-');
+ CMethodId id;
+ if (!FindHashMethod(EXTERNAL_CODECS_LOC_VARS m.MethodName, id))
+ return E_NOTIMPL;
+ unsigned index = ids.AddToUniqueSorted(id);
+ if (ids.Size() != methods.Size())
+ methods.Insert(index, m);
+ }
+ }
+
+ for (i = 0; i < ids.Size(); i++)
+ {
+ CMyComPtr<IHasher> hasher;
+ AString name;
+ RINOK(CreateHasher(EXTERNAL_CODECS_LOC_VARS ids[i], name, hasher));
+ if (!hasher)
+ throw "Can't create hasher";
+ const COneMethodInfo &m = methods[i];
+ {
+ CMyComPtr<ICompressSetCoderProperties> scp;
+ hasher.QueryInterface(IID_ICompressSetCoderProperties, &scp);
+ if (scp)
+ RINOK(m.SetCoderProps(scp, NULL));
+ }
+ UInt32 digestSize = hasher->GetDigestSize();
+ if (digestSize > k_HashCalc_DigestSize_Max)
+ return E_NOTIMPL;
+ CHasherState &h = Hashers.AddNew();
+ h.Hasher = hasher;
+ h.Name = name;
+ h.DigestSize = digestSize;
+ for (unsigned k = 0; k < k_HashCalc_NumGroups; k++)
+ memset(h.Digests[k], 0, digestSize);
+ }
+
+ return S_OK;
+}
+
+void CHashBundle::InitForNewFile()
+{
+ CurSize = 0;
+ FOR_VECTOR (i, Hashers)
+ {
+ CHasherState &h = Hashers[i];
+ h.Hasher->Init();
+ memset(h.Digests[k_HashCalc_Index_Current], 0, h.DigestSize);
+ }
+}
+
+void CHashBundle::Update(const void *data, UInt32 size)
+{
+ CurSize += size;
+ FOR_VECTOR (i, Hashers)
+ Hashers[i].Hasher->Update(data, size);
+}
+
+void CHashBundle::SetSize(UInt64 size)
+{
+ CurSize = size;
+}
+
+static void AddDigests(Byte *dest, const Byte *src, UInt32 size)
+{
+ unsigned next = 0;
+ for (UInt32 i = 0; i < size; i++)
+ {
+ next += (unsigned)dest[i] + (unsigned)src[i];
+ dest[i] = (Byte)next;
+ next >>= 8;
+ }
+}
+
+void CHashBundle::Final(bool isDir, bool isAltStream, const UString &path)
+{
+ if (isDir)
+ NumDirs++;
+ else if (isAltStream)
+ {
+ NumAltStreams++;
+ AltStreamsSize += CurSize;
+ }
+ else
+ {
+ NumFiles++;
+ FilesSize += CurSize;
+ }
+
+ Byte pre[16];
+ memset(pre, 0, sizeof(pre));
+ if (isDir)
+ pre[0] = 1;
+
+ FOR_VECTOR (i, Hashers)
+ {
+ CHasherState &h = Hashers[i];
+ if (!isDir)
+ {
+ h.Hasher->Final(h.Digests[0]);
+ if (!isAltStream)
+ AddDigests(h.Digests[k_HashCalc_Index_DataSum], h.Digests[0], h.DigestSize);
+ }
+
+ h.Hasher->Init();
+ h.Hasher->Update(pre, sizeof(pre));
+ h.Hasher->Update(h.Digests[0], h.DigestSize);
+
+ for (unsigned k = 0; k < path.Len(); k++)
+ {
+ wchar_t c = path[k];
+ Byte temp[2] = { (Byte)(c & 0xFF), (Byte)((c >> 8) & 0xFF) };
+ h.Hasher->Update(temp, 2);
+ }
+
+ Byte tempDigest[k_HashCalc_DigestSize_Max];
+ h.Hasher->Final(tempDigest);
+ if (!isAltStream)
+ AddDigests(h.Digests[k_HashCalc_Index_NamesSum], tempDigest, h.DigestSize);
+ AddDigests(h.Digests[k_HashCalc_Index_StreamsSum], tempDigest, h.DigestSize);
+ }
+}
+
+
+HRESULT HashCalc(
+ DECL_EXTERNAL_CODECS_LOC_VARS
+ const NWildcard::CCensor &censor,
+ const CHashOptions &options,
+ AString &errorInfo,
+ IHashCallbackUI *callback)
+{
+ CDirItems dirItems;
+ dirItems.Callback = callback;
+
+ if (options.StdInMode)
+ {
+ CDirItem di;
+ di.Size = (UInt64)(Int64)-1;
+ di.Attrib = 0;
+ di.MTime.dwLowDateTime = 0;
+ di.MTime.dwHighDateTime = 0;
+ di.CTime = di.ATime = di.MTime;
+ dirItems.Items.Add(di);
+ }
+ else
+ {
+ RINOK(callback->StartScanning());
+ dirItems.ScanAltStreams = options.AltStreamsMode;
+
+ HRESULT res = EnumerateItems(censor,
+ options.PathMode,
+ UString(),
+ dirItems);
+
+ if (res != S_OK)
+ {
+ if (res != E_ABORT)
+ errorInfo = "Scanning error";
+ return res;
+ }
+ RINOK(callback->FinishScanning(dirItems.Stat));
+ }
+
+ unsigned i;
+ CHashBundle hb;
+ RINOK(hb.SetMethods(EXTERNAL_CODECS_LOC_VARS options.Methods));
+ hb.Init();
+
+ hb.NumErrors = dirItems.Stat.NumErrors;
+
+ if (options.StdInMode)
+ {
+ RINOK(callback->SetNumFiles(1));
+ }
+ else
+ {
+ RINOK(callback->SetTotal(dirItems.Stat.GetTotalBytes()));
+ }
+
+ const UInt32 kBufSize = 1 << 15;
+ CHashMidBuf buf;
+ if (!buf.Alloc(kBufSize))
+ return E_OUTOFMEMORY;
+
+ UInt64 completeValue = 0;
+
+ RINOK(callback->BeforeFirstFile(hb));
+
+ for (i = 0; i < dirItems.Items.Size(); i++)
+ {
+ CMyComPtr<ISequentialInStream> inStream;
+ UString path;
+ bool isDir = false;
+ bool isAltStream = false;
+ if (options.StdInMode)
+ {
+ inStream = new CStdInFileStream;
+ }
+ else
+ {
+ CInFileStream *inStreamSpec = new CInFileStream;
+ inStream = inStreamSpec;
+ const CDirItem &dirItem = dirItems.Items[i];
+ isDir = dirItem.IsDir();
+ isAltStream = dirItem.IsAltStream;
+ path = dirItems.GetLogPath(i);
+ if (!isDir)
+ {
+ FString phyPath = dirItems.GetPhyPath(i);
+ if (!inStreamSpec->OpenShared(phyPath, options.OpenShareForWrite))
+ {
+ HRESULT res = callback->OpenFileError(phyPath, ::GetLastError());
+ hb.NumErrors++;
+ if (res != S_FALSE)
+ return res;
+ continue;
+ }
+ }
+ }
+ RINOK(callback->GetStream(path, isDir));
+ UInt64 fileSize = 0;
+
+ hb.InitForNewFile();
+ if (!isDir)
+ {
+ for (UInt32 step = 0;; step++)
+ {
+ if ((step & 0xFF) == 0)
+ RINOK(callback->SetCompleted(&completeValue));
+ UInt32 size;
+ RINOK(inStream->Read(buf, kBufSize, &size));
+ if (size == 0)
+ break;
+ hb.Update(buf, size);
+ fileSize += size;
+ completeValue += size;
+ }
+ }
+ hb.Final(isDir, isAltStream, path);
+ RINOK(callback->SetOperationResult(fileSize, hb, !isDir));
+ RINOK(callback->SetCompleted(&completeValue));
+ }
+ return callback->AfterLastFile(hb);
+}
+
+
+static inline char GetHex(unsigned v)
+{
+ return (char)((v < 10) ? ('0' + v) : ('A' + (v - 10)));
+}
+
+void AddHashHexToString(char *dest, const Byte *data, UInt32 size)
+{
+ dest[size * 2] = 0;
+
+ if (!data)
+ {
+ for (UInt32 i = 0; i < size; i++)
+ {
+ dest[0] = ' ';
+ dest[1] = ' ';
+ dest += 2;
+ }
+ return;
+ }
+
+ int step = 2;
+ if (size <= 8)
+ {
+ step = -2;
+ dest += size * 2 - 2;
+ }
+
+ for (UInt32 i = 0; i < size; i++)
+ {
+ unsigned b = data[i];
+ dest[0] = GetHex((b >> 4) & 0xF);
+ dest[1] = GetHex(b & 0xF);
+ dest += step;
+ }
+}
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