osinfo.c File Reference

#include "winver_p.h"

Include dependency graph for osinfo.c:

Go to the source code of this file.

Macros
#define	OSINFO_KEY   L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion"

Functions
static VOID	Winver_GetRegValueString (_In_ HKEY hKey, _In_ LPCWSTR pValue, _Out_ LPWSTR pBuffer, _In_ DWORD cchSize)
static VOID	Winver_GetFormattedSpkInfo (_In_ HKEY hKey, _Out_ LPWSTR pBuffer, _In_ DWORD cchSize)
static VOID	Winver_FormatCompatInfo (_In_ HKEY hKey, _Out_ LPWSTR pBuffer, _In_ DWORD cchSize)
BOOL	Winver_GetOSInfo (_Out_ PWINVER_OS_INFO OSInfo)

Macro Definition Documentation

OSINFO_KEY

#define OSINFO_KEY   L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion"

Definition at line 10 of file osinfo.c.

Function Documentation

Winver_FormatCompatInfo()

static VOID Winver_FormatCompatInfo ( _In_ HKEY  hKey, _Out_ LPWSTR  pBuffer, _In_ DWORD  cchSize  )

static

Definition at line 65 of file osinfo.c.

{
    WCHAR szNtVersion[16];
    WCHAR szNtBuild[16];
    WCHAR szNtSpk[64];
    WCHAR szFormat[64] = L"";
 
    /* NOTE: Required info must be valid */
    Winver_GetRegValueString(hKey, L"CurrentVersion", szNtVersion, _countof(szNtVersion));
    Winver_GetRegValueString(hKey, L"CurrentBuildNumber", szNtBuild, _countof(szNtBuild));
    if (!szNtVersion[0] || !szNtBuild[0])
    {
        /* Return empty string on failure */
        pBuffer[0] = UNICODE_NULL;
        return;
    }
 
    /* NOTE: Service pack info is optional */
    Winver_GetFormattedSpkInfo(hKey, szNtSpk, _countof(szNtSpk));
 
    LoadStringW(Winver_hInstance,
                IDS_OSINFO_COMPAT_FORMAT,
                szFormat,
                _countof(szFormat));
 
    StringCchPrintfW(pBuffer, cchSize, szFormat, szNtVersion, szNtBuild, szNtSpk);
}

Referenced by Winver_GetOSInfo().

Winver_GetFormattedSpkInfo()

static VOID Winver_GetFormattedSpkInfo ( _In_ HKEY  hKey, _Out_ LPWSTR  pBuffer, _In_ DWORD  cchSize  )

static

Definition at line 39 of file osinfo.c.

{
    WCHAR szRegValue[48];
    WCHAR szFormat[16] = L"";
 
    Winver_GetRegValueString(hKey, L"CSDVersion", szRegValue, _countof(szRegValue));
    if (!szRegValue[0])
    {
        /* Return empty string on failure */
        pBuffer[0] = UNICODE_NULL;
        return;
    }
 
    LoadStringW(Winver_hInstance,
                IDS_OSINFO_SPK_FORMAT,
                szFormat,
                _countof(szFormat));
 
    StringCchPrintfW(pBuffer, cchSize, szFormat, szRegValue);
}

Referenced by Winver_FormatCompatInfo().

Winver_GetOSInfo()

BOOL Winver_GetOSInfo

(

_Out_ PWINVER_OS_INFO

OSInfo

)

Definition at line 97 of file osinfo.c.

{
    HKEY hKey;
    LSTATUS lError;
 
    lError = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
                           OSINFO_KEY,
                           0,
                           KEY_QUERY_VALUE,
                           &hKey);
    if (lError != ERROR_SUCCESS)
        return FALSE;
 
    /* OS name */
    Winver_GetRegValueString(hKey, L"ProductName", OSInfo->szName, _countof(OSInfo->szName));
    if (!OSInfo->szName[0])
    {
        /* This info must be valid */
        RegCloseKey(hKey);
        return FALSE;
    }
 
    /* Compatibility information */
    Winver_FormatCompatInfo(hKey, OSInfo->szCompatInfo, _countof(OSInfo->szCompatInfo));
 
    RegCloseKey(hKey);
 
    return TRUE;
}

Referenced by wWinMain().

Winver_GetRegValueString()

static VOID Winver_GetRegValueString ( _In_ HKEY  hKey, _In_ LPCWSTR  pValue, _Out_ LPWSTR  pBuffer, _In_ DWORD  cchSize  )

static

Definition at line 14 of file osinfo.c.

{
    DWORD dwType, dwSize;
    LSTATUS lError;
 
    /* NOTE: Reserved space for a NULL terminator */
    dwSize = (cchSize - 1) * sizeof(WCHAR);
    lError = RegQueryValueExW(hKey, pValue, NULL, &dwType, (LPBYTE)pBuffer, &dwSize);
    if (lError != ERROR_SUCCESS || dwType != REG_SZ)
    {
        /* Return empty string on failure */
        pBuffer[0] = UNICODE_NULL;
        return;
    }
 
    /* Ensure the returned string is NULL terminated */
    pBuffer[cchSize - 1] = UNICODE_NULL;
}

Referenced by Winver_FormatCompatInfo(), Winver_GetFormattedSpkInfo(), and Winver_GetOSInfo().