misc.c File Reference

#include "sndvol32.h"
#include <winreg.h>

Include dependency graph for misc.c:

Go to the source code of this file.

Functions
static INT	LengthOfStrResource (IN HINSTANCE hInst, IN UINT uID)
INT	AllocAndLoadString (OUT LPWSTR *lpTarget, IN HINSTANCE hInst, IN UINT uID)
DWORD	LoadAndFormatString (IN HINSTANCE hInstance, IN UINT uID, OUT LPWSTR *lpTarget,...)
BOOL	InitAppConfig (VOID)
VOID	CloseAppConfig (VOID)
BOOL	WriteLineConfig (IN LPTSTR szDeviceName, IN LPTSTR szLineName, IN PSNDVOL_REG_LINESTATE LineState, IN DWORD cbSize)
BOOL	ReadLineConfig (IN LPTSTR szDeviceName, IN LPTSTR szLineName, IN LPTSTR szControlName, OUT DWORD *Flags)

Variables
static const TCHAR	AppRegSettings [] = TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Applets\\Volume Control")
static const TCHAR	LineStatesValue [] = TEXT("LineStates")
HKEY	hAppSettingsKey = NULL

Function Documentation

AllocAndLoadString()

INT AllocAndLoadString	(	OUT LPWSTR *	lpTarget,
		IN HINSTANCE	hInst,
		IN UINT	uID
	)

Definition at line 70 of file misc.c.

{
    INT ln;

    ln = LengthOfStrResource(hInst,
                             uID);
    if (ln++ > 0)
    {
        (*lpTarget) = (LPWSTR)LocalAlloc(LMEM_FIXED,
                                         ln * sizeof(WCHAR));
        if ((*lpTarget) != NULL)
        {
            INT Ret = LoadStringW(hInst,
                                  uID,
                                  *lpTarget,
                                  ln);
            if (!Ret)
            {
                LocalFree((HLOCAL)(*lpTarget));
            }
            return Ret;
        }
    }
    return 0;
}

CloseAppConfig()

VOID CloseAppConfig

(

VOID

)

Definition at line 152 of file misc.c.

Referenced by _tWinMain().

{
    if (hAppSettingsKey != NULL)
    {
        RegCloseKey(hAppSettingsKey);
        hAppSettingsKey = NULL;
    }
}

InitAppConfig()

BOOL InitAppConfig

(

VOID

)

Definition at line 138 of file misc.c.

Referenced by _tWinMain().

{
    return RegCreateKeyEx(HKEY_CURRENT_USER,
                          AppRegSettings,
                          0,
                          NULL,
                          REG_OPTION_NON_VOLATILE,
                          KEY_READ | KEY_WRITE,
                          NULL,
                          &hAppSettingsKey,
                          NULL) == ERROR_SUCCESS;
}

LengthOfStrResource()

static INT LengthOfStrResource ( IN HINSTANCE  hInst, IN UINT  uID  )

static

Definition at line 31 of file misc.c.

{
    HRSRC hrSrc;
    HGLOBAL hRes;
    LPWSTR lpName, lpStr;

    if (hInst == NULL)
    {
        return -1;
    }

    /* There are always blocks of 16 strings */
    lpName = (LPWSTR)MAKEINTRESOURCE((uID >> 4) + 1);

    /* Find the string table block */
    if ((hrSrc = FindResourceW(hInst,
                               lpName,
                               (LPWSTR)RT_STRING)) &&
        (hRes = LoadResource(hInst,
                             hrSrc)) &&
        (lpStr = LockResource(hRes)))
    {
        UINT x;

        /* Find the string we're looking for */
        uID &= 0xF; /* position in the block, same as % 16 */
        for (x = 0; x < uID; x++)
        {
            lpStr += (*lpStr) + 1;
        }

        /* Found the string */
        return (int)(*lpStr);
    }
    return -1;
}

LoadAndFormatString()

DWORD LoadAndFormatString	(	IN HINSTANCE	hInstance,
		IN UINT	uID,
		OUT LPWSTR *	lpTarget,
			...
	)

Definition at line 99 of file misc.c.

{
    DWORD Ret = 0;
    LPWSTR lpFormat;
    va_list lArgs;

    if (AllocAndLoadString(&lpFormat,
                           hInstance,
                           uID) > 0)
    {
        va_start(lArgs, lpTarget);
        /* let's use FormatMessage to format it because it has the ability to
           allocate memory automatically */
        Ret = FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_STRING,
                             lpFormat,
                             0,
                             0,
                             (LPWSTR)lpTarget,
                             0,
                             &lArgs);
        va_end(lArgs);

        LocalFree((HLOCAL)lpFormat);
    }

    return Ret;
}

ReadLineConfig()

BOOL ReadLineConfig	(	IN LPTSTR	szDeviceName,
		IN LPTSTR	szLineName,
		IN LPTSTR	szControlName,
		OUT DWORD *	Flags
	)

Definition at line 197 of file misc.c.

Referenced by EnumConnectionsCallback(), and PrefDlgAddConnection().

{
    HKEY hLineKey;
    DWORD Type;
    DWORD i, Size = 0;
    PSNDVOL_REG_LINESTATE LineStates = NULL;
    TCHAR szDevRegKey[MAX_PATH];
    BOOL Ret = FALSE;

    _stprintf(szDevRegKey,
              TEXT("%s\\%s"),
              szDeviceName,
              szLineName);

    if (RegCreateKeyEx(hAppSettingsKey,
                       szDevRegKey,
                       0,
                       NULL,
                       REG_OPTION_NON_VOLATILE,
                       KEY_READ | KEY_WRITE,
                       NULL,
                       &hLineKey,
                       NULL) == ERROR_SUCCESS)
    {
        if (RegQueryValueEx(hLineKey,
                            LineStatesValue,
                            NULL,
                            &Type,
                            NULL,
                            &Size) != ERROR_SUCCESS ||
            Type != REG_BINARY ||
            Size == 0 || (Size % sizeof(SNDVOL_REG_LINESTATE) != 0))
        {
            goto ExitClose;
        }

        LineStates = HeapAlloc(GetProcessHeap(),
                               HEAP_ZERO_MEMORY,
                               Size);

        if (LineStates != NULL)
        {
            if (RegQueryValueEx(hLineKey,
                                LineStatesValue,
                                NULL,
                                &Type,
                                (LPBYTE)LineStates,
                                &Size) != ERROR_SUCCESS ||
                Type != REG_BINARY ||
                Size == 0 || (Size % sizeof(SNDVOL_REG_LINESTATE) != 0))
            {
                goto ExitClose;
            }

            /* try to find the control */
            for (i = 0; i < Size / sizeof(SNDVOL_REG_LINESTATE); i++)
            {
                if (!_tcscmp(szControlName,
                             LineStates[i].LineName))
                {
                    *Flags = LineStates[i].Flags;
                    Ret = TRUE;
                    break;
                }
            }
        }

ExitClose:
        HeapFree(GetProcessHeap(),
                 0,
                 LineStates);
        RegCloseKey(hLineKey);
    }

    return Ret;
}

WriteLineConfig()

BOOL WriteLineConfig	(	IN LPTSTR	szDeviceName,
		IN LPTSTR	szLineName,
		IN PSNDVOL_REG_LINESTATE	LineState,
		IN DWORD	cbSize
	)

Definition at line 162 of file misc.c.

Referenced by WriteLineSettings().

{
    HKEY hLineKey;
    TCHAR szDevRegKey[MAX_PATH];
    BOOL Ret = FALSE;

    _stprintf(szDevRegKey,
              TEXT("%s\\%s"),
              szDeviceName,
              szLineName);

    if (RegCreateKeyEx(hAppSettingsKey,
                       szDevRegKey,
                       0,
                       NULL,
                       REG_OPTION_NON_VOLATILE,
                       KEY_READ | KEY_WRITE,
                       NULL,
                       &hLineKey,
                       NULL) == ERROR_SUCCESS)
    {
        /* now update line states */
        RegSetValueEx(hLineKey, LineStatesValue, 0, REG_BINARY, (const BYTE*)LineState, cbSize);
        Ret = TRUE;

        RegCloseKey(hLineKey);
    }

    return Ret;
}

Variable Documentation

AppRegSettings

const TCHAR AppRegSettings[] = TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Applets\\Volume Control")

static

Definition at line 130 of file misc.c.

Referenced by InitAppConfig().

hAppSettingsKey

HKEY hAppSettingsKey = NULL

Definition at line 135 of file misc.c.

LineStatesValue

const TCHAR LineStatesValue[] = TEXT("LineStates")

static

Definition at line 132 of file misc.c.

Referenced by ReadLineConfig(), and WriteLineConfig().