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diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.9.2/src/Unicode.cpp b/Build/source/texk/dvisvgm/dvisvgm-1.9.2/src/Unicode.cpp
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+++ b/Build/source/texk/dvisvgm/dvisvgm-1.9.2/src/Unicode.cpp
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+/*************************************************************************
+** Unicode.cpp **
+** **
+** This file is part of dvisvgm -- the DVI to SVG converter **
+** Copyright (C) 2005-2015 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 <cstddef>
+#include "Unicode.h"
+
+using namespace std;
+
+
+/** Returns true if c is a valid unicode point in XML documents.
+ * XML version 1.0 doesn't allow various unicode character references
+ * (&#1; for example). */
+bool Unicode::isValidCodepoint (UInt32 c) {
+ if ((c & 0xffff) == 0xfffe || (c & 0xffff) == 0xffff)
+ return false;
+
+ UInt32 ranges[] = {
+ 0x0000, 0x0020,
+ 0x007f, 0x0084,
+ 0x0086, 0x009f,
+ 0x202a, 0x202e, // bidi control characters
+ 0xd800, 0xdfff,
+ 0xfdd0, 0xfdef,
+ };
+ for (size_t i=0; i < sizeof(ranges)/sizeof(UInt32)/2; i++)
+ if (c >= ranges[2*i] && c <= ranges[2*i+1])
+ return false;
+ return true;
+}
+
+
+/** Converts a unicode value to a UTF-8 byte sequence.
+ * @param[in] c character code
+ * @return utf8 seqence consisting of 1-4 bytes */
+string Unicode::utf8 (Int32 c) {
+ string utf8;
+ if (c >= 0) {
+ if (c < 0x80)
+ utf8 += c;
+ else if (c < 0x800) {
+ utf8 += 0xC0 + (c >> 6);
+ utf8 += 0x80 + (c & 0x3F);
+ }
+ else if (c < 0x10000) {
+ utf8 += 0xE0 + (c >> 12);
+ utf8 += 0x80 + ((c >> 6) & 0x3F);
+ utf8 += 0x80 + (c & 0x3F);
+ }
+ else if (c < 0x110000) {
+ utf8 += 0xF0 + (c >> 18);
+ utf8 += 0x80 + ((c >> 12) & 0x3F);
+ utf8 += 0x80 + ((c >> 6) & 0x3F);
+ utf8 += 0x80 + (c & 0x3F);
+ }
+ // UTF-8 does not support codepoints >= 0x110000
+ }
+ return utf8;
+}