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diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.0.11/src/SignalHandler.cpp b/Build/source/texk/dvisvgm/dvisvgm-1.0.11/src/SignalHandler.cpp
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+++ b/Build/source/texk/dvisvgm/dvisvgm-1.0.11/src/SignalHandler.cpp
@@ -0,0 +1,85 @@
+/*************************************************************************
+** SignalHandler.cpp **
+** **
+** This file is part of dvisvgm -- the DVI to SVG converter **
+** Copyright (C) 2005-2012 Martin Gieseking <martin.gieseking@uos.de> **
+** **
+** This program is free software; you can redistribute it and/or **
+** modify it under the terms of the GNU General Public License as **
+** published by the Free Software Foundation; either version 3 of **
+** the License, or (at your option) any later version. **
+** **
+** This program is distributed in the hope that it will be useful, but **
+** WITHOUT ANY WARRANTY; without even the implied warranty of **
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
+** GNU General Public License for more details. **
+** **
+** You should have received a copy of the GNU General Public License **
+** along with this program; if not, see <http://www.gnu.org/licenses/>. **
+*************************************************************************/
+
+#include <cerrno>
+#include <csignal>
+#include <cstdlib>
+#include "SignalHandler.h"
+
+using namespace std;
+
+bool SignalHandler::_break = false;
+
+
+SignalHandler::~SignalHandler() {
+ stop();
+}
+
+
+/** Returns the singleton handler object. */
+SignalHandler& SignalHandler::instance() {
+ static SignalHandler handler;
+ return handler;
+}
+
+
+/** Starts listening to CTRL-C signals.
+ * @return true if handler was activated. */
+bool SignalHandler::start () {
+ if (!_active) {
+ _break = false;
+ if (signal(SIGINT, SignalHandler::callback) != SIG_ERR) {
+ _active = true;
+ return true;
+ }
+ }
+ return false;
+}
+
+
+/** Stops listening for CTRL-C signals. */
+void SignalHandler::stop () {
+ if (_active) {
+ signal(SIGINT, SIG_DFL);
+ _active = false;
+ }
+}
+
+
+/** Checks for incoming signals and throws an exception if CTRL-C was caught.
+ * @throw SignalException */
+void SignalHandler::check() {
+ if (_break)
+ throw SignalException();
+}
+
+
+void SignalHandler::trigger (bool notify) {
+ _break = true;
+ if (notify)
+ check();
+}
+
+
+/** This function is called on CTRL-C signals. */
+void SignalHandler::callback (int) {
+ _break = true;
+}
+