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1 // ArchiveExports.cpp
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2
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3 #include "StdAfx.h"
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4
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5 #include "../../Common/ComTry.h"
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6 #include "../../Common/Types.h"
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7 #include "../../Windows/PropVariant.h"
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8 #include "../Common/RegisterArc.h"
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9
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10 #include "IArchive.h"
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11 #include "../ICoder.h"
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12 #include "../IPassword.h"
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13
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14 static const unsigned int kNumArcsMax = 32;
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15 static unsigned int g_NumArcs = 0;
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16 static const CArcInfo *g_Arcs[kNumArcsMax];
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17 void RegisterArc(const CArcInfo *arcInfo)
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18 {
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19 if (g_NumArcs < kNumArcsMax)
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20 g_Arcs[g_NumArcs++] = arcInfo;
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21 }
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22
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23 DEFINE_GUID(CLSID_CArchiveHandler,
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24 0x23170F69, 0x40C1, 0x278A, 0x10, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00);
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25
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26 #define CLS_ARC_ID_ITEM(cls) ((cls).Data4[5])
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27
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28 static inline HRESULT SetPropString(const char *s, unsigned int size, PROPVARIANT *value)
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29 {
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30 if ((value->bstrVal = ::SysAllocStringByteLen(s, size)) != 0)
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31 value->vt = VT_BSTR;
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32 return S_OK;
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33 }
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34
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35 static inline HRESULT SetPropGUID(const GUID &guid, PROPVARIANT *value)
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36 {
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37 return SetPropString((const char *)&guid, sizeof(GUID), value);
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38 }
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39
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40 int FindFormatCalssId(const GUID *clsID)
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41 {
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42 GUID cls = *clsID;
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43 CLS_ARC_ID_ITEM(cls) = 0;
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44 if (cls != CLSID_CArchiveHandler)
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45 return -1;
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46 Byte id = CLS_ARC_ID_ITEM(*clsID);
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47 for (unsigned i = 0; i < g_NumArcs; i++)
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48 if (g_Arcs[i]->ClassId == id)
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49 return (int)i;
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50 return -1;
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51 }
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52
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53 STDAPI CreateArchiver(const GUID *clsid, const GUID *iid, void **outObject)
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54 {
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55 COM_TRY_BEGIN
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56 {
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57 int needIn = (*iid == IID_IInArchive);
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58 int needOut = (*iid == IID_IOutArchive);
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59 if (!needIn && !needOut)
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60 return E_NOINTERFACE;
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61 int formatIndex = FindFormatCalssId(clsid);
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62 if (formatIndex < 0)
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63 return CLASS_E_CLASSNOTAVAILABLE;
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64
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65 const CArcInfo &arc = *g_Arcs[formatIndex];
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66 if (needIn)
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67 {
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68 *outObject = arc.CreateInArchive();
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69 ((IInArchive *)*outObject)->AddRef();
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70 }
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71 else
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72 {
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73 if (!arc.CreateOutArchive)
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74 return CLASS_E_CLASSNOTAVAILABLE;
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75 *outObject = arc.CreateOutArchive();
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76 ((IOutArchive *)*outObject)->AddRef();
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77 }
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78 }
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79 COM_TRY_END
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80 return S_OK;
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81 }
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82
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83 STDAPI GetHandlerProperty2(UInt32 formatIndex, PROPID propID, PROPVARIANT *value)
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84 {
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85 if (formatIndex >= g_NumArcs)
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86 return E_INVALIDARG;
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87 const CArcInfo &arc = *g_Arcs[formatIndex];
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88 NWindows::NCOM::CPropVariant prop;
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89 switch(propID)
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90 {
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91 case NArchive::kName:
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92 prop = arc.Name;
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93 break;
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94 case NArchive::kClassID:
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95 {
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96 GUID clsId = CLSID_CArchiveHandler;
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97 CLS_ARC_ID_ITEM(clsId) = arc.ClassId;
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98 return SetPropGUID(clsId, value);
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99 }
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100 case NArchive::kExtension:
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101 if (arc.Ext != 0)
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102 prop = arc.Ext;
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103 break;
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104 case NArchive::kAddExtension:
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105 if (arc.AddExt != 0)
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106 prop = arc.AddExt;
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107 break;
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108 case NArchive::kUpdate:
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109 prop = (bool)(arc.CreateOutArchive != 0);
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110 break;
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111 case NArchive::kKeepName:
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112 prop = arc.KeepName;
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113 break;
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114 case NArchive::kStartSignature:
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115 return SetPropString((const char *)arc.Signature, arc.SignatureSize, value);
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116 }
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117 prop.Detach(value);
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118 return S_OK;
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119 }
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120
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121 STDAPI GetHandlerProperty(PROPID propID, PROPVARIANT *value)
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122 {
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123 return GetHandlerProperty2(0, propID, value);
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124 }
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125
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126 STDAPI GetNumberOfFormats(UINT32 *numFormats)
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127 {
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128 *numFormats = g_NumArcs;
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129 return S_OK;
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130 }
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