字符串参数常量字符* 和常量 wchar_t*

尝试为 msi 安装程序设置外部 UI。

我从这里复制并粘贴了以下代码，我希望这些代码开箱即用： https://msdn.microsoft.com/en-us/library/windows/desktop/aa368786(v=vs.85).aspx

MsiSetExternalUI (TestMyBasicUIHandler,
INSTALLLOGMODE_PROGRESS|INSTALLLOGMODE_FATALEXIT|INSTALLLOGMODE_ERROR
|INSTALLLOGMODE_WARNING|INSTALLLOGMODE_USER|INSTALLLOGMODE_INFO
|INSTALLLOGMODE_RESOLVESOURCE|INSTALLLOGMODE_OUTOFDISKSPACE
|INSTALLLOGMODE_ACTIONSTART|INSTALLLOGMODE_ACTIONDATA
|INSTALLLOGMODE_COMMONDATA|INSTALLLOGMODE_PROGRESS|INSTALLLOGMODE_INITIALIZE
|INSTALLLOGMODE_TERMINATE|INSTALLLOGMODE_SHOWDIALOG,
TEXT("TEST"));

错误是：

invalid conversion from 'int (__attribute__((__stdcall__)) *)(LPVOID, UINT, LPCSTR) {aka int (__attribute__((__stdcall__)) *)(void*, unsigned int, const char*)}' to 'INSTALLUI_HANDLERW {aka int (__attribute__((__stdcall__)) *)(void*, unsigned int, const wchar_t*)}' [-fpermissive]
TEXT("TEST"));
^

因此，错误似乎是由于期望const wchar_t*但仅传递const char*。 我也试过这个，也不起作用：

std::string test = "TEST";
wchar_t *someString = new wchar_t[ test.length() + 1 ];
std::copy( test.begin(), test.end(), someString );
someString[ test.length() ] = 0;

然后我用someString而不是TEXT("TEST")调用该方法。

这是代码：

// https://msdn.microsoft.com/en-us/library/windows/desktop/aa368786(v=vs.85).aspx
// Globals
//
//    common data information fields
int g_rgiField[3]; //array of fields to handle INSTALLOGMODE_COMMONDATA data
WORD g_wLANGID = LANG_NEUTRAL; // initialize to neutral language
//
//    progress information fields
int iField[4]; //array of record fields to handle INSTALLOGMODE_PROGRESS data
int  g_iProgressTotal = 0; // total ticks on progress bar
int  g_iProgress = 0;      // amount of progress
int  iCurPos = 0;
BOOL bFirstTime = TRUE;
BOOL g_bForwardProgress = TRUE; //TRUE if the progress bar control should be incremented in a forward direction
BOOL g_bScriptInProgress = FALSE;
BOOL g_bEnableActionData; //TRUE if INSTALLOGMODE_ACTIONDATA messages are sending progress information
BOOL g_bCancelInstall = FALSE; //Should be set to TRUE if the user clicks Cancel button.
// In the following snippet, note that the internal user
// interface level is set to INSTALLLEVEL_NONE. If the internal
// user interface level is set to anything other than
// INSTALLUILEVEL_NONE, the user interface level is
// INSTALLUILEVEL_BASIC by default and the installer only
// displays an initial dialog. If the authored wizard
// sequence of the package is to be displayed, the user
// interface level should be set to INSTALLUILEVEL_FULL.
// If the external user interface handler is to have full
// control of the installation user interface, the user
// interface level must be set to INSTALLUILEVEL_NONE.
// Because an external UI handler cannot handle the
// INSTALLMESSAGE_RESOLVESOURCE message,
// Windows Installer allows a UI level,INSTALLUILEVEL_SOURCERESONLY
// that will allow an external UI handler to have full control while also still
// permitting an install to resolve the source

//
//  FUNCTION: FGetInteger(char*& pch)
//
//  PURPOSE:  Converts the string (from current pos. to next whitespace or '')
//            to an integer.
//
//  COMMENTS: Assumes correct syntax.  Ptr is updated to new position at whitespace
//            or null terminator.
//
int FGetInteger(char*& rpch)
{
char* pchPrev = rpch;
while (*rpch && *rpch != ' ')
rpch++;
*rpch = '';
int i = atoi(pchPrev);
return i;
}
//
//  FUNCTION: ParseProgressString(LPSTR sz)
//
//  PURPOSE:  Parses the progress data message sent to the INSTALLUI_HANDLER callback
//
//  COMMENTS: Assumes correct syntax.
//
//
//  FUNCTION: ParseCommonDataString(LPSTR sz)
//
//  PURPOSE:  Parses the common data message sent to the INSTALLUI_HANDLER callback
//
//  COMMENTS: Ignores the 3rd field and the caption common data message. Assumes correct syntax.
//
BOOL ParseCommonDataString(LPSTR sz)
{
char *pch = sz;
if (0 == *pch)
return FALSE; // no msg
while (*pch != 0)
{
char chField = *pch++;
pch++; // for ':'
pch++; // for sp
switch (chField)
{
case '1': // field 1
{
// common data message type
g_rgiField[0] = *pch++ - '0';
if (g_rgiField[0] == 1)
return FALSE; // we are ignoring caption messages
break;
}
case '2': // field 2
{
// because we are ignoring caption msg, these are all ints
g_rgiField[1] = FGetInteger(pch);
return TRUE; // done processing
}
default: // unknown field
{
return FALSE;
}
}
pch++; // for space (' ') between fields
}
return TRUE;
}
BOOL ParseProgressString(LPSTR sz)
{
char *pch = sz;
if (0 == *pch)
return FALSE; // no msg
while (*pch != 0)
{
char chField = *pch++;
pch++; // for ':'
pch++; // for sp
switch (chField)
{
case '1': // field 1
{
// progress message type
if (0 == isdigit(*pch))
return FALSE; // blank record
iField[0] = *pch++ - '0';
break;
}
case '2': // field 2
{
iField[1] = FGetInteger(pch);
if (iField[0] == 2 || iField[0] == 3)
return TRUE; // done processing
break;
}
case '3': // field 3
{
iField[2] = FGetInteger(pch);
if (iField[0] == 1)
return TRUE; // done processing
break;
}
case '4': // field 4
{
iField[3] = FGetInteger(pch);
return TRUE; // done processing
}
default: // unknown field
{
return FALSE;
}
}
pch++; // for space (' ') between fields
}
return TRUE;
}

int _stdcall TestMyBasicUIHandler(LPVOID pvContext, UINT iMessageType, LPCTSTR szMessage)
{
// File costing is skipped when applying Patch(es) and INSTALLUILEVEL is NONE.
// Workaround: Set INSTALLUILEVEL to anything but NONE only once.
if (bFirstTime == TRUE)
{
UINT r1 = MsiSetInternalUI(INSTALLUILEVEL_BASIC, NULL);
bFirstTime = FALSE;
}
if (!szMessage)
return 0;
INSTALLMESSAGE mt;
UINT uiFlags;
mt = (INSTALLMESSAGE)(0xFF000000 & (UINT)iMessageType);
uiFlags = 0x00FFFFFF & iMessageType;
switch (mt)
{
//Premature termination
case INSTALLMESSAGE_FATALEXIT:
/* Get fatal error message here and display it*/
return 0; //MessageBox(0, szMessage, TEXT("FatalError"), uiFlags);
case INSTALLMESSAGE_ERROR:
{
/* Get error message here and display it*/
// language and caption can be obtained from common data msg
MessageBeep(uiFlags & MB_ICONMASK);
return 0; //MessageBoxEx(0, szMessage, TEXT("Error"), uiFlags, g_wLANGID);
}
case INSTALLMESSAGE_WARNING:
/* Get warning message here and display it */
return 0; //MessageBox(0, szMessage, TEXT("Warning"), uiFlags);
case INSTALLMESSAGE_USER:
/* Get user message here */
// parse uiFlags to get Message Box Styles Flag and return appopriate value, IDOK, IDYES, etc.
return IDOK;
case INSTALLMESSAGE_INFO:
return IDOK;
case INSTALLMESSAGE_FILESINUSE:
/* Display FilesInUse dialog */
// parse the message text to provide the names of the
// applications that the user can close so that the
// files are no longer in use.
return 0;
case INSTALLMESSAGE_RESOLVESOURCE:
/* ALWAYS return 0 for ResolveSource */
return 0;
case INSTALLMESSAGE_OUTOFDISKSPACE:
/* Get user message here */
return IDOK;
case INSTALLMESSAGE_ACTIONSTART:
/* New action started, any action data is sent by this new action */
g_bEnableActionData = FALSE;
return IDOK;
case INSTALLMESSAGE_ACTIONDATA:
// only act if progress total has been initialized
if (0 == g_iProgressTotal)
return IDOK;
//        SetDlgItemText(/*handle to your dialog*/,/*identifier of your actiontext control*/, szMessage);
if(g_bEnableActionData)
{
//            SendMessage(/*handle to your progress control*/,PBM_STEPIT,0,0);
}
return IDOK;
case INSTALLMESSAGE_PROGRESS:
{
#if (0)
if(ParseProgressString(const_cast<LPSTR>(szMessage)))
{
// all fields off by 1 due to c array notation
switch(iField[0])
{
case 0: // Reset progress bar
{
//field 1 = 0, field 2 = total number of ticks, field 3 = direction, field 4 = in progress
/* get total number of ticks in progress bar */
g_iProgressTotal = iField[1];
/* determine direction */
if (iField[2] == 0)
g_bForwardProgress = TRUE;
else // iField[2] == 1
g_bForwardProgress = FALSE;
/* get current position of progress bar, depends on direction */
// if Forward direction, current position is 0
// if Backward direction, current position is Total # ticks
g_iProgress = g_bForwardProgress ? 0 : g_iProgressTotal;
//                        SendMessage(/*handle to your progress control*/, PBM_SETRANGE32, 0, g_iProgressTotal);
// if g_bScriptInProgress, finish progress bar, else reset (and set up according to direction)
//                        SendMessage(/*handle to your progress control*/, PBM_SETPOS, g_bScriptInProgress ? g_iProgressTotal : g_iProgress, 0);
iCurPos = 0;
/* determine new state */
// if new state = 1 (script in progress), could send a "Please wait..." msg
// new state = 1 means the total # of progress ticks is an estimate, and may not add up correctly
g_bScriptInProgress = (iField[3] == 1) ? TRUE : FALSE;
break;
}
case 1:  // ActionInfo
{
//field 1 = 1, field 2 will contain the number of ticks to increment the bar
//ignore if field 3 is zero
if(iField[2])
{
// movement direction determined by g_bForwardProgress set by reset progress msg
//                            SendMessage(/*handle to your progress control*/, PBM_SETSTEP, g_bForwardProgress ? iField[1] : -1*iField[1], 0);
g_bEnableActionData = TRUE;
}
else
{
g_bEnableActionData = FALSE;
}
break;
}
case 2: //ProgressReport
{
// only act if progress total has been initialized
if (0 == g_iProgressTotal)
break;
iCurPos += iField[1];
//field 1 = 2,field 2 will contain the number of ticks the bar has moved
// movement direction determined by g_bForwardProgress set by reset progress msg
cout /*<< PBM_SETPOS << ", " */<< iCurPos << endl;
//                        SendMessage(/*handle to your progress control*/, PBM_SETPOS, g_bForwardProgress ? iCurPos : -1*iCurPos, 0);
break;
}
case 3: // ProgressAddition - fall through (we don't care to handle it -- total tick count adjustment)
default:
{
break;
}
}
}
#endif
if(g_bCancelInstall == TRUE)
{
return IDCANCEL;
}
else
return IDOK;
}

case INSTALLMESSAGE_COMMONDATA:
{
#if ( 0)
if (ParseCommonDataString(const_cast<LPSTR>(szMessage)))
{
// all fields off by 1 due to c array notation
switch (g_rgiField[0])
{
case 0:
// field 1 = 0, field 2 = LANGID, field 3 = CodePage
g_wLANGID = g_rgiField[1];
break;
case 1:
// field 1 = 1, field 2 = CAPTION
/* you could use this as the caption for MessageBoxes */
break;
case 2:
// field 1 = 2, field 2 = 0 (hide cancel button) OR 1 (show cancel button)
//                    ShowWindow(/*handle to cancel button control on the progress indicator dialog box*/, g_rgiField[1] == 0 ? SW_HIDE : SW_SHOW);
break;
default:
break;
}
}
#endif
return IDOK;
}
// this message is received prior to internal UI initialization, no string data
case INSTALLMESSAGE_INITIALIZE:
return IDOK;
// Sent after UI termination, no string data
case INSTALLMESSAGE_TERMINATE:
return IDOK;
//Sent prior to display of authored dialog or wizard
case INSTALLMESSAGE_SHOWDIALOG:
return IDOK;
default:
return 0;
}
}

这就是我所说的：

// https://msdn.microsoft.com/en-us/library/windows/desktop/aa370053(v=vs.85).aspx
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa368786(v=vs.85).aspx
MsiSetInternalUI(INSTALLUILEVEL(INSTALLUILEVEL_NONE|INSTALLUILEVEL_SOURCERESONLY), NULL);
//    std::string test = "TEST";
//    wchar_t *someString = new wchar_t[ test.length() + 1 ];
//    std::copy( test.begin(), test.end(), someString );
//    someString[ test.length() ] = 0;

MsiSetExternalUI (TestMyBasicUIHandler,
INSTALLLOGMODE_PROGRESS|INSTALLLOGMODE_FATALEXIT|INSTALLLOGMODE_ERROR
|INSTALLLOGMODE_WARNING|INSTALLLOGMODE_USER|INSTALLLOGMODE_INFO
|INSTALLLOGMODE_RESOLVESOURCE|INSTALLLOGMODE_OUTOFDISKSPACE
|INSTALLLOGMODE_ACTIONSTART|INSTALLLOGMODE_ACTIONDATA
|INSTALLLOGMODE_COMMONDATA|INSTALLLOGMODE_PROGRESS|INSTALLLOGMODE_INITIALIZE
|INSTALLLOGMODE_TERMINATE|INSTALLLOGMODE_SHOWDIALOG,
TEXT("TEST"));
MsiInstallProduct(save_path,NULL);