1 // ArchiveExports.cpp
2
3 #include "StdAfx.h"
4
5 #include "../../../C/7zVersion.h"
6
7 #include "../../Common/ComTry.h"
8
9 #include "../../Windows/PropVariant.h"
10
11 #include "../Common/RegisterArc.h"
12
13 static const unsigned kNumArcsMax = 64;
14 static unsigned g_NumArcs = 0;
15 static unsigned g_DefaultArcIndex = 0;
16 static const CArcInfo *g_Arcs[kNumArcsMax];
17
RegisterArc(const CArcInfo * arcInfo)18 void RegisterArc(const CArcInfo *arcInfo) throw()
19 {
20 if (g_NumArcs < kNumArcsMax)
21 {
22 const char *p = arcInfo->Name;
23 if (p[0] == '7' && p[1] == 'z' && p[2] == 0)
24 g_DefaultArcIndex = g_NumArcs;
25 g_Arcs[g_NumArcs++] = arcInfo;
26 }
27 }
28
29 DEFINE_GUID(CLSID_CArchiveHandler,
30 k_7zip_GUID_Data1,
31 k_7zip_GUID_Data2,
32 k_7zip_GUID_Data3_Common,
33 0x10, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00);
34
35 #define CLS_ARC_ID_ITEM(cls) ((cls).Data4[5])
36
SetPropStrFromBin(const char * s,unsigned size,PROPVARIANT * value)37 static inline HRESULT SetPropStrFromBin(const char *s, unsigned size, PROPVARIANT *value)
38 {
39 if ((value->bstrVal = ::SysAllocStringByteLen(s, size)) != 0)
40 value->vt = VT_BSTR;
41 return S_OK;
42 }
43
SetPropGUID(const GUID & guid,PROPVARIANT * value)44 static inline HRESULT SetPropGUID(const GUID &guid, PROPVARIANT *value)
45 {
46 return SetPropStrFromBin((const char *)&guid, sizeof(guid), value);
47 }
48
FindFormatCalssId(const GUID * clsid)49 static int FindFormatCalssId(const GUID *clsid)
50 {
51 GUID cls = *clsid;
52 CLS_ARC_ID_ITEM(cls) = 0;
53 if (cls != CLSID_CArchiveHandler)
54 return -1;
55 Byte id = CLS_ARC_ID_ITEM(*clsid);
56 for (unsigned i = 0; i < g_NumArcs; i++)
57 if (g_Arcs[i]->Id == id)
58 return (int)i;
59 return -1;
60 }
61
62 STDAPI CreateArchiver(const GUID *clsid, const GUID *iid, void **outObject);
CreateArchiver(const GUID * clsid,const GUID * iid,void ** outObject)63 STDAPI CreateArchiver(const GUID *clsid, const GUID *iid, void **outObject)
64 {
65 COM_TRY_BEGIN
66 {
67 int needIn = (*iid == IID_IInArchive);
68 int needOut = (*iid == IID_IOutArchive);
69 if (!needIn && !needOut)
70 return E_NOINTERFACE;
71 int formatIndex = FindFormatCalssId(clsid);
72 if (formatIndex < 0)
73 return CLASS_E_CLASSNOTAVAILABLE;
74
75 const CArcInfo &arc = *g_Arcs[formatIndex];
76 if (needIn)
77 {
78 *outObject = arc.CreateInArchive();
79 ((IInArchive *)*outObject)->AddRef();
80 }
81 else
82 {
83 if (!arc.CreateOutArchive)
84 return CLASS_E_CLASSNOTAVAILABLE;
85 *outObject = arc.CreateOutArchive();
86 ((IOutArchive *)*outObject)->AddRef();
87 }
88 }
89 COM_TRY_END
90 return S_OK;
91 }
92
93 STDAPI GetHandlerProperty2(UInt32 formatIndex, PROPID propID, PROPVARIANT *value);
GetHandlerProperty2(UInt32 formatIndex,PROPID propID,PROPVARIANT * value)94 STDAPI GetHandlerProperty2(UInt32 formatIndex, PROPID propID, PROPVARIANT *value)
95 {
96 COM_TRY_BEGIN
97 NWindows::NCOM::PropVariant_Clear(value);
98 if (formatIndex >= g_NumArcs)
99 return E_INVALIDARG;
100 const CArcInfo &arc = *g_Arcs[formatIndex];
101 NWindows::NCOM::CPropVariant prop;
102 switch (propID)
103 {
104 case NArchive::NHandlerPropID::kName: prop = arc.Name; break;
105 case NArchive::NHandlerPropID::kClassID:
106 {
107 GUID clsId = CLSID_CArchiveHandler;
108 CLS_ARC_ID_ITEM(clsId) = arc.Id;
109 return SetPropGUID(clsId, value);
110 }
111 case NArchive::NHandlerPropID::kExtension: if (arc.Ext) prop = arc.Ext; break;
112 case NArchive::NHandlerPropID::kAddExtension: if (arc.AddExt) prop = arc.AddExt; break;
113 case NArchive::NHandlerPropID::kUpdate: prop = (bool)(arc.CreateOutArchive != NULL); break;
114 case NArchive::NHandlerPropID::kKeepName: prop = ((arc.Flags & NArcInfoFlags::kKeepName) != 0); break;
115 case NArchive::NHandlerPropID::kAltStreams: prop = ((arc.Flags & NArcInfoFlags::kAltStreams) != 0); break;
116 case NArchive::NHandlerPropID::kNtSecure: prop = ((arc.Flags & NArcInfoFlags::kNtSecure) != 0); break;
117 case NArchive::NHandlerPropID::kFlags: prop = (UInt32)arc.Flags; break;
118 case NArchive::NHandlerPropID::kTimeFlags: prop = (UInt32)arc.TimeFlags; break;
119 case NArchive::NHandlerPropID::kSignatureOffset: prop = (UInt32)arc.SignatureOffset; break;
120 // case NArchive::NHandlerPropID::kVersion: prop = (UInt32)MY_VER_MIX; break;
121
122 case NArchive::NHandlerPropID::kSignature:
123 if (arc.SignatureSize != 0 && !arc.IsMultiSignature())
124 return SetPropStrFromBin((const char *)arc.Signature, arc.SignatureSize, value);
125 break;
126 case NArchive::NHandlerPropID::kMultiSignature:
127 if (arc.SignatureSize != 0 && arc.IsMultiSignature())
128 return SetPropStrFromBin((const char *)arc.Signature, arc.SignatureSize, value);
129 break;
130 }
131 prop.Detach(value);
132 return S_OK;
133 COM_TRY_END
134 }
135
136 STDAPI GetHandlerProperty(PROPID propID, PROPVARIANT *value);
GetHandlerProperty(PROPID propID,PROPVARIANT * value)137 STDAPI GetHandlerProperty(PROPID propID, PROPVARIANT *value)
138 {
139 return GetHandlerProperty2(g_DefaultArcIndex, propID, value);
140 }
141
142 STDAPI GetNumberOfFormats(UINT32 *numFormats);
GetNumberOfFormats(UINT32 * numFormats)143 STDAPI GetNumberOfFormats(UINT32 *numFormats)
144 {
145 *numFormats = g_NumArcs;
146 return S_OK;
147 }
148
149 STDAPI GetIsArc(UInt32 formatIndex, Func_IsArc *isArc);
GetIsArc(UInt32 formatIndex,Func_IsArc * isArc)150 STDAPI GetIsArc(UInt32 formatIndex, Func_IsArc *isArc)
151 {
152 *isArc = NULL;
153 if (formatIndex >= g_NumArcs)
154 return E_INVALIDARG;
155 *isArc = g_Arcs[formatIndex]->IsArc;
156 return S_OK;
157 }
158