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#include "main.h"
#include "./ieversion.h"
#include <shlwapi.h>
#include <strsafe.h>
HRESULT MSIE_GetVersionString(LPWSTR pszBuffer, INT cchBufferMax)
{
if (NULL == pszBuffer) return E_INVALIDARG;
HKEY hKey = NULL;
LONG result = RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"Software\\Microsoft\\Internet Explorer", 0,
STANDARD_RIGHTS_READ | KEY_QUERY_VALUE, &hKey);
if (ERROR_SUCCESS == result)
{
DWORD cbBuffer = sizeof(WCHAR) * cchBufferMax;
result = RegQueryValueEx(hKey, L"svcVersion", NULL, NULL, (BYTE*)pszBuffer, &cbBuffer);
if (ERROR_SUCCESS != result
|| L'\0' == *pszBuffer)
{
cbBuffer = sizeof(WCHAR) * cchBufferMax;
result = RegQueryValueEx(hKey, L"Version", NULL, NULL, (BYTE*)pszBuffer, &cbBuffer);
}
RegCloseKey(hKey);
}
if (ERROR_SUCCESS != result)
{
*pszBuffer = L'\0';
return HRESULT_FROM_WIN32(result);
}
return S_OK;
}
HRESULT MSIE_GetVersion(INT *majorOut, INT *minorOut, INT *buildOut, INT *subBuildOut)
{
INT szVersion[4] = { 0, 0, 0, 0};
WCHAR szBuffer[64] = {0};
HRESULT hr = MSIE_GetVersionString(szBuffer, ARRAYSIZE(szBuffer));
if (SUCCEEDED(hr))
{
INT index = 0;
LPWSTR block = szBuffer;
LPWSTR cursor = block;
for(;;)
{
if (L'\0' == *cursor)
{
if (block != cursor && FALSE != StrToIntEx(block,STIF_DEFAULT, &szVersion[index]))
index++;
break;
}
else if (L'.' == *cursor)
{
*cursor = L'\0';
if (block != cursor && FALSE != StrToIntEx(block,STIF_DEFAULT, &szVersion[index]))
{
index++;
if (index == ARRAYSIZE(szVersion))
break; // too many numbers
}
cursor++;
block = cursor;
}
cursor++;
}
if (index < ARRAYSIZE(szVersion))
hr = E_FAIL;
}
if (NULL != majorOut) *majorOut = szVersion[0];
if (NULL != minorOut) *minorOut = szVersion[1];
if (NULL != buildOut) *buildOut = szVersion[2];
if (NULL != subBuildOut) *subBuildOut = szVersion[3];
return hr;
}
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