diff options
author | Tor Arne Vestbø <tor.arne.vestbo@qt.io> | 2020-10-15 17:04:27 +0200 |
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committer | Tor Arne Vestbø <tor.arne.vestbo@qt.io> | 2020-10-17 12:13:00 +0200 |
commit | b5af1408099dedd132f36e04d19cb5771a23ec28 (patch) | |
tree | 85109c13469dcde91aea87e29ed52c116732fbf8 /src/entrypoint | |
parent | 8ec4fd9cffe7977f6d7cb68ce38de4386a5795d6 (diff) |
Generalize the winmain/qtmain entry-point library
The use-case is relevant for other platforms as well.
Now that Qt has a module system we can also replace a lot of the
hand crafted logic for linking with simpler constructs.
Change-Id: Ib6853aaf81bfea79c31f2de741d65b4b56f23ef6
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Diffstat (limited to 'src/entrypoint')
-rw-r--r-- | src/entrypoint/CMakeLists.txt | 33 | ||||
-rw-r--r-- | src/entrypoint/entrypoint.pro | 30 | ||||
-rw-r--r-- | src/entrypoint/qtentrypoint_win.cpp | 102 |
3 files changed, 165 insertions, 0 deletions
diff --git a/src/entrypoint/CMakeLists.txt b/src/entrypoint/CMakeLists.txt new file mode 100644 index 0000000000..16c01540dd --- /dev/null +++ b/src/entrypoint/CMakeLists.txt @@ -0,0 +1,33 @@ +# special case begin +# special case skip regeneration +if (NOT WIN32) + return() +endif() + +qt_internal_add_module(EntryPoint + STATIC + NO_SYNC_QT + NO_MODULE_HEADERS + DEFINES + QT_NO_FOREACH + INCLUDE_DIRECTORIES + $<TARGET_PROPERTY:Qt::Core,INTERFACE_INCLUDE_DIRECTORIES> +) + +if (MSVC) + # Store debug information inside the static lib + qt_internal_replace_compiler_flags( + "/Zi" "/Z7" + CONFIGS DEBUG RELWITHDEBINFO + IN_CURRENT_SCOPE) +endif() + +qt_internal_extend_target(EntryPoint CONDITION WIN32 + SOURCES qtentrypoint_win.cpp + LIBRARIES shell32 +) + +qt_internal_extend_target(EntryPoint CONDITION MINGW + DEFINES QT_NEEDS_QMAIN +) +# special case end diff --git a/src/entrypoint/entrypoint.pro b/src/entrypoint/entrypoint.pro new file mode 100644 index 0000000000..dd0618cd56 --- /dev/null +++ b/src/entrypoint/entrypoint.pro @@ -0,0 +1,30 @@ +# Additional Qt project file for QtEntryPoint lib +!win32:error("$$_FILE_ is intended only for Windows!") + +TARGET = QtEntryPoint + +CONFIG += static no_module_headers +QT = core + +DEFINES += QT_NO_FOREACH + +win32 { + SOURCES = qtentrypoint_win.cpp + CONFIG -= qt + + QMAKE_USE_PRIVATE += shell32 + + msvc { + QMAKE_CFLAGS_DEBUG -= -Zi + QMAKE_CXXFLAGS_DEBUG -= -Zi + QMAKE_CFLAGS_DEBUG *= -Z7 + QMAKE_CXXFLAGS_DEBUG *= -Z7 + } + mingw { + DEFINES += QT_NEEDS_QMAIN + MODULE_DEFINES += QT_NEEDS_QMAIN + LIBS += -lmingw32 + } +} + +load(qt_module) diff --git a/src/entrypoint/qtentrypoint_win.cpp b/src/entrypoint/qtentrypoint_win.cpp new file mode 100644 index 0000000000..200eb5379d --- /dev/null +++ b/src/entrypoint/qtentrypoint_win.cpp @@ -0,0 +1,102 @@ +/**************************************************************************** +** +** Copyright (C) 2019 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the Windows main function of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** BSD License Usage +** Alternatively, you may use this file under the terms of the BSD license +** as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <windows.h> +#include <shellapi.h> + +/* + This file contains the code in the QtEntryPoint library for Windows. + QtEntryPoint contains the Windows startup code and is required for + linking to the Qt DLL. + + When a Windows application starts, the WinMain function is + invoked. +*/ + +#if defined(QT_NEEDS_QMAIN) +int qMain(int, char **); +#define main qMain +#else +extern "C" int main(int, char **); +#endif + +/* + WinMain() - Initializes Windows and calls user's startup function main(). + NOTE: WinMain() won't be called if the application was linked as a "console" + application. +*/ + +// Convert a wchar_t to char string, equivalent to QString::toLocal8Bit() +// when passed CP_ACP. +static inline char *wideToMulti(unsigned int codePage, const wchar_t *aw) +{ + const int required = WideCharToMultiByte(codePage, 0, aw, -1, nullptr, 0, nullptr, nullptr); + char *result = new char[required]; + WideCharToMultiByte(codePage, 0, aw, -1, result, required, nullptr, nullptr); + return result; +} + +extern "C" int APIENTRY WinMain(HINSTANCE, HINSTANCE, LPSTR /*cmdParamarg*/, int /* cmdShow */) +{ + int argc = 0; + wchar_t **argvW = CommandLineToArgvW(GetCommandLineW(), &argc); + if (argvW == nullptr) + return -1; + char **argv = new char *[argc + 1]; + for (int i = 0; i != argc; ++i) + argv[i] = wideToMulti(CP_ACP, argvW[i]); + argv[argc] = nullptr; + LocalFree(argvW); + const int exitCode = main(argc, argv); + for (int i = 0; (i != argc) && (argv[i] != nullptr); ++i) + delete [] argv[i]; + delete [] argv; + return exitCode; +} |