qtcbuildhelper for Windows added

This little tool sits between Qt Creator and the build tool (e.g. nmake)
and allows us to send Ctrl-C instead of terminating it the hard way.

Task-number: QTCREATORBUG-4558
Change-Id: I6c40c4cc9bf75cca3f2b744785b99bc146a3df4e
Reviewed-on: http://codereview.qt.nokia.com/2554


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@nokia.com>

src/tools/qtcbuildhelper/main.cpp

+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (info@qt.nokia.com)
+**
+**
+** GNU Lesser General Public License Usage
+**
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this file.
+** Please review the following information to ensure the GNU Lesser General
+** Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** Other Usage
+**
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at info@qt.nokia.com.
+**
+**************************************************************************/
+
+/* A stub for Windows console processes (like nmake) that is able to terminate
+ * its child process via a generated Ctrl-C event.
+ * The termination is triggered by sending a custom message to the HWND of
+ * this process. */
+
+#ifndef WINVER
+#define WINVER 0x0501
+#endif
+
+#ifndef _WIN32_WINNT
+#define _WIN32_WINNT 0x0501
+#endif
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <shellapi.h>
+#include <wchar.h>
+#include <cstdlib>
+#include <cstdio>
+
+const wchar_t szTitle[] = L"qtcbuildhelper";
+const wchar_t szWindowClass[] = L"wcqtcbuildhelper";
+UINT uiShutDownWindowMessage;
+HWND hwndMain = 0;
+
+LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
+BOOL WINAPI ctrlHandler(DWORD dwCtrlType);
+bool findFirst(const wchar_t *str, const size_t strLength, const size_t startPos, const wchar_t *chars, size_t &pos);
+bool startProcess(wchar_t pCommandLine[]);
+
+int main(int argc, char **)
+{
+    if (argc < 2) {
+        fprintf(stderr, "This is an internal helper of Qt Creator. Do not run it manually.\n");
+        return 1;
+    }
+
+    SetConsoleCtrlHandler(ctrlHandler, TRUE);
+    uiShutDownWindowMessage = RegisterWindowMessage(L"qtcbuildhelper_shutdown");
+
+    WNDCLASSEX wcex;
+    ZeroMemory(&wcex, sizeof(wcex));
+    wcex.cbSize = sizeof(wcex);
+    wcex.lpfnWndProc = WndProc;
+    wcex.hInstance = GetModuleHandle(0);
+    wcex.lpszClassName = szWindowClass;
+    if (!RegisterClassEx(&wcex))
+        return 1;
+
+    hwndMain = CreateWindow(szWindowClass, szTitle, WS_DISABLED,
+                            0, 0, 0, 0, NULL, NULL, wcex.hInstance, NULL);
+    if (!hwndMain)
+        return FALSE;
+
+    // Get the command line and remove the call to this executable.
+    // Note: We trust Qt Creator at this point to quote the call to this tool in a sensible way.
+    // Strange things like C:\Q"t Crea"tor\bin\qtcbuildhelper.exe are not supported.
+    wchar_t *strCommandLine = _wcsdup(GetCommandLine());
+    const size_t strCommandLineLength = wcslen(strCommandLine);
+    size_t pos = 1;
+    if (strCommandLine[0] == L'"')
+        if (!findFirst(strCommandLine, strCommandLineLength, pos, L"\"", pos))
+            return 1;
+    if (!findFirst(strCommandLine, strCommandLineLength, pos, L" \t", pos))
+        return 1;
+    wmemmove_s(strCommandLine, strCommandLineLength, strCommandLine + pos + 2, strCommandLineLength - pos);
+
+    bool bSuccess = startProcess(strCommandLine);
+    free(strCommandLine);
+
+    if (!bSuccess)
+        return 1;
+
+    MSG msg;
+    while (GetMessage(&msg, NULL, 0, 0))
+    {
+        TranslateMessage(&msg);
+        DispatchMessage(&msg);
+    }
+
+    return (int) msg.wParam;
+}
+
+LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+    if (message == uiShutDownWindowMessage) {
+        GenerateConsoleCtrlEvent(CTRL_C_EVENT, 0);
+        PostQuitMessage(0);
+        return 0;
+    }
+
+    switch (message)
+    {
+    case WM_DESTROY:
+        PostQuitMessage(0);
+        break;
+    default:
+        return DefWindowProc(hWnd, message, wParam, lParam);
+    }
+    return 0;
+}
+
+bool findFirst(const wchar_t *str, const size_t strLength, const size_t startPos, const wchar_t *chars, size_t &pos)
+{
+    for (size_t i=startPos; i < strLength; ++i) {
+        for (size_t j=0; chars[j]; ++j) {
+            if (str[i] == chars[j]) {
+                pos = i;
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+BOOL WINAPI ctrlHandler(DWORD /*dwCtrlType*/)
+{
+    PostMessage(hwndMain, WM_DESTROY, 0, 0);
+    return TRUE;
+}
+
+DWORD WINAPI processWatcherThread(__in LPVOID lpParameter)
+{
+    HANDLE hProcess = reinterpret_cast<HANDLE>(lpParameter);
+    WaitForSingleObject(hProcess, INFINITE);
+    PostMessage(hwndMain, WM_DESTROY, 0, 0);
+    return 0;
+}
+
+bool startProcess(wchar_t *pCommandLine)
+{
+    SECURITY_ATTRIBUTES sa;
+    ZeroMemory(&sa, sizeof(sa));
+    sa.nLength = sizeof(sa);
+    sa.bInheritHandle = TRUE;
+
+    STARTUPINFO si;
+    ZeroMemory(&si, sizeof(si));
+    si.cb = sizeof(si);
+
+    PROCESS_INFORMATION pi;
+    DWORD dwCreationFlags = 0;
+    BOOL bSuccess = CreateProcess(NULL, pCommandLine, &sa, &sa, TRUE, dwCreationFlags, NULL, NULL, &si, &pi);
+    if (!bSuccess) {
+        fwprintf(stderr, L"qtcbuildhelper: Command line failed: %s\n", pCommandLine);
+        return false;
+    }
+
+    HANDLE hThread = CreateThread(NULL, 0, processWatcherThread, reinterpret_cast<void*>(pi.hProcess), 0, NULL);
+    if (!hThread) {
+        fwprintf(stderr, L"qtcbuildhelper: The watch dog thread cannot be started.\n");
+        return false;
+    }
+    CloseHandle(hThread);
+    return true;
+}
+

src/tools/qtcbuildhelper/qtcbuildhelper.pro

+!win32: error("qtcbuildhelper is Windows only")
+
+include(../../../qtcreator.pri)
+
+TEMPLATE  = app
+TARGET    = qtcbuildhelper
+DESTDIR   = $$IDE_BIN_PATH
+
+QT        -= qt core gui
+CONFIG    += console warn_on
+
+SOURCES   += main.cpp
+LIBS      += user32.lib shell32.lib
+

src/tools/tools.pro

 TEMPLATE = subdirs
 
 win32:SUBDIRS = qtcdebugger
+win32:SUBDIRS += qtcbuildhelper
 SUBDIRS += qtpromaker
 SUBDIRS += qmlpuppet