1 files changed, 75 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/VectorStream.hpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/VectorStream.hpp
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index 00000000000..5b5512e59bf
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+++ b/Build/source/texk/dvisvgm/dvisvgm-src/src/VectorStream.hpp
@@ -0,0 +1,75 @@
+/*************************************************************************
+** VectorStream.hpp                                                     **
+**                                                                      **
+** This file is part of dvisvgm -- a fast DVI to SVG converter          **
+** Copyright (C) 2005-2017 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/>. **
+*************************************************************************/
+
+#ifndef VECTORSTREAM_HPP
+#define VECTORSTREAM_HPP
+
+#include <istream>
+#include <vector>
+
+template <typename T>
+class VectorStreamBuffer : public std::streambuf
+{
+	public:
+		VectorStreamBuffer (const std::vector<T> &v) : _begin(&v[0]), _end(&v[0]+v.size()), _curr(&v[0]) {}
+
+	protected:
+		int_type underflow () override {return _curr == _end ? traits_type::eof() : traits_type::to_int_type(*_curr);}
+		int_type uflow() override {return _curr == _end ? traits_type::eof() : traits_type::to_int_type(*_curr++);}
+		std::streamsize showmanyc () override {return _end-_curr;}
+
+		int_type pbackfail (int_type c) override {
+			if (_curr == _begin || (c != traits_type::eof() && c != _curr[-1]))
+				return traits_type::eof();
+			return traits_type::to_int_type(*--_curr);
+		}
+
+		pos_type seekoff (off_type off, std::ios_base::seekdir dir, std::ios_base::openmode which=std::ios_base::in) override {
+			switch (dir) {
+				case std::ios_base::cur:
+					_curr += off; break;
+				case std::ios_base::beg:
+					_curr = _begin+off; break;
+				case std::ios_base::end:
+					_curr = _end-off; break;
+				default:
+					break;
+			}
+			return _curr-_begin;
+		}
+
+	private:
+		const T *_begin;
+		const T *_end;
+		const T *_curr;
+};
+
+
+template <typename T>
+class VectorInputStream : public std::istream
+{
+	public:
+		VectorInputStream (const std::vector<T> &source) : std::istream(&_buf), _buf(source) {}
+
+	private:
+		VectorStreamBuffer<T> _buf;
+};
+
+#endif