[Launcher] Add mingw compatable setenv.

src/main.cpp

@@ -12,12 +12,15 @@
 #include "filesavedialog.h"
 #include "mpvobject.h"
 
+#if defined(MINGW) || defined(__MINGW32__) || defined(__MINGW64__)
+#include "setenv_mingw.hpp"
+#endif
+
+
 int main( int argc, char *argv[] )
 {
-#ifndef  __MINGW32__
     setenv("QT_QPA_PLATFORMTHEME", "gtk3", 0);
     setenv("QT_QUICK_CONTROLS_STYLE","Desktop",1);
-#endif
     QApplication app(argc, argv);
     app.setOrganizationName("KittehPlayer");
     app.setOrganizationDomain("namedkitten.pw");
@@ -38,11 +41,9 @@ int main( int argc, char *argv[] )
     QProcess dpms;
     dpms.start("xset", QStringList() << "-dpms");
 
-#ifndef __MINGW32__
     QString newpath = QProcessEnvironment::systemEnvironment().value("APPDIR", "") + "/usr/bin:" + QProcessEnvironment::systemEnvironment().value("PATH", "");
     qDebug() << newpath;
     setenv("PATH", newpath.toUtf8().constData(), 1);
-#endif	
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
     QApplication::setAttribute(Qt::AA_UseSoftwareOpenGL	);
     qmlRegisterType<MpvObject>("player", 1, 0, "MpvObject");

src/setenv_mingw.hpp

@@ -0,0 +1,93 @@
+/*
+ * setenv.c
+ *
+ * Implementation of POSIX standard IEEE 1003.1-2008 setenv() function;
+ * may also be invoked inline, as "retval = setenv( varname, NULL, 1 )",
+ * to implement the complementary unsetenv() function.
+ *
+ * $Id$
+ *
+ * Written by Keith Marshall <keithmarshall@users.sourceforge.net>
+ * Copyright (C) 2016, MinGW.org Project
+ *
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+#define _POSIX_C_SOURCE 200809L
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+int setenv( const char *var, const char *value, int overwrite )
+{
+  /* Core implementation for both setenv() and unsetenv() functions;
+   * at the outset, assume that the requested operation may fail.
+   */
+  int retval = -1;
+
+  /* The specified "var" name MUST be non-NULL, not a zero-length
+   * string, and must not include any '=' character.
+   */
+  if( var && *var && (strchr( var, '=' ) == NULL) )
+  {
+    /* A properly named variable may be added to, removed from,
+     * or modified within the environment, ONLY if "overwrite"
+     * mode is enabled, OR if the named variable does not yet
+     * exist...
+     */ 
+    if( overwrite || getenv( var ) == NULL )
+    {
+      /* ... in which cases, we convert the specified name and
+       * value into the appropriate form for use with putenv(),
+       * (noting that we accept a NULL "value" as equivalent to
+       * a zero-length string, which renders putenv() as the
+       * equivalent of unsetenv()).
+       */
+      const char *fmt = "%s=%s";
+      const char *val = value ? value : "";
+      char buf[1 + snprintf( NULL, 0, fmt, var, val )];
+      snprintf( buf, sizeof( buf ), fmt, var, val );
+      if( (retval = putenv( buf )) != 0 )
+	/*
+	 * If putenv() returns non-zero, indicating failure, the
+	 * most probable explanation is that there wasn't enough
+	 * free memory; ensure that errno is set accordingly.
+	 */
+        errno = ENOMEM;
+    }
+    else
+      /* The named variable already exists, and overwrite mode
+       * was not enabled; there is nothing to be done.
+       */
+      retval = 0;
+  }
+  else
+    /* The specified environment variable name was invalid.
+     */
+    errno = EINVAL;
+
+  /* Succeed or fail, "retval" has now been set to indicate the
+   * appropriate status for return.
+   */
+  return retval;
+}
+