dllexports.cpp

来自「由7-zip提供的压缩、解压缩程序」· C++ 代码 · 共 106 行

// DLLExports.cpp

#include "StdAfx.h"

#include "Common/MyInitGuid.h"
#include "Common/ComTry.h"

#include "../Rar20/Rar20Decoder.h"
#include "Rar29Decoder.h"

// {23170F69-40C1-278B-0403-010000000000}
DEFINE_GUID(CLSID_CCompressRar15Decoder, 
0x23170F69, 0x40C1, 0x278B, 0x04, 0x03, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00);

// {23170F69-40C1-278B-0403-020000000000}
DEFINE_GUID(CLSID_CCompressRar20Decoder, 
0x23170F69, 0x40C1, 0x278B, 0x04, 0x03, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00);

// {23170F69-40C1-278B-0403-030000000000}
DEFINE_GUID(CLSID_CCompressRar29Decoder, 
0x23170F69, 0x40C1, 0x278B, 0x04, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00);

extern "C"
DLLEXPORT BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID /*lpReserved*/)
{
	return TRUE;
}

STDAPI CreateObject(const GUID *clsid, const GUID *iid, void **outObject)
{
  COM_TRY_BEGIN
  *outObject = 0;

  int correctInterface = (*iid == IID_ICompressCoder);
  CMyComPtr<ICompressCoder> coder;
  if (*clsid == CLSID_CCompressRar15Decoder)
  {
    if (!correctInterface)
      return E_NOINTERFACE;
    coder = (ICompressCoder *)new NCompress::NRar15::CDecoder;
  }
  else if (*clsid == CLSID_CCompressRar20Decoder)
  {
    if (!correctInterface)
      return E_NOINTERFACE;
    coder = (ICompressCoder *)new NCompress::NRar20::CDecoder;
  }
  else if (*clsid == CLSID_CCompressRar29Decoder)
  {
    if (!correctInterface)
      return E_NOINTERFACE;
    coder = (ICompressCoder *)new NCompress::NRar29::CDecoder;
  }
  else
    return CLASS_E_CLASSNOTAVAILABLE;
  *outObject = coder.Detach();
  COM_TRY_END
  return S_OK;
}

struct CRarMethodItem
{
  char ID[3];
  const wchar_t *UserName;
  const GUID *Decoder;
};

static CRarMethodItem g_Methods[] =
{
  { { 0x04, 0x03, 0x01 }, L"Rar15", &CLSID_CCompressRar15Decoder },
  { { 0x04, 0x03, 0x02 }, L"Rar20", &CLSID_CCompressRar20Decoder },
  { { 0x04, 0x03, 0x03 }, L"Rar29", &CLSID_CCompressRar29Decoder }
};

STDAPI GetNumberOfMethods(UINT32 *numMethods)
{
  *numMethods = sizeof(g_Methods) / sizeof(g_Methods[1]);
  return S_OK;
}

STDAPI GetMethodProperty(UINT32 index, PROPID propID, PROPVARIANT *value)
{
  if (index > sizeof(g_Methods) / sizeof(g_Methods[1]))
    return E_INVALIDARG;
  VariantClear((tagVARIANT *)value);
  const CRarMethodItem &method = g_Methods[index];
  switch(propID)
  {
    case NMethodPropID::kID:
      if ((value->bstrVal = ::SysAllocStringByteLen(method.ID, 
          sizeof(method.ID))) != 0)
        value->vt = VT_BSTR;
      return S_OK;
    case NMethodPropID::kName:
      if ((value->bstrVal = ::SysAllocString(method.UserName)) != 0)
        value->vt = VT_BSTR;
      return S_OK;
    case NMethodPropID::kDecoder:
      if ((value->bstrVal = ::SysAllocStringByteLen(
          (const char *)method.Decoder, sizeof(GUID))) != 0)
        value->vt = VT_BSTR;
      return S_OK;
  }
  return S_OK;
}