dvisvgm 1.0.8

git-svn-id: svn://tug.org/texlive/trunk@22715 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 159 insertions, 0 deletions

diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.0.8/src/FontEncoding.cpp b/Build/source/texk/dvisvgm/dvisvgm-1.0.8/src/FontEncoding.cpp
new file mode 100644
index 00000000000..e02e859933d
--- /dev/null
+++ b/Build/source/texk/dvisvgm/dvisvgm-1.0.8/src/FontEncoding.cpp
@@ -0,0 +1,159 @@
+/*************************************************************************
+** FontEncoding.cpp                                                     **
+**                                                                      **
+** This file is part of dvisvgm -- the DVI to SVG converter             **
+** Copyright (C) 2005-2011 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 <fstream>
+#include "Font.h"
+#include "FontEncoding.h"
+#include "InputBuffer.h"
+#include "InputReader.h"
+#include "FileFinder.h"
+#include "Message.h"
+
+using namespace std;
+
+static string read_entry (InputReader &in);
+static bool valid_name_char (int c);
+
+
+FontEncoding::FontEncoding (const string &encname) : _encname(encname)
+{
+	read();
+}
+
+
+const char* FontEncoding::path () const {
+	return FileFinder::lookup(_encname+".enc");
+}
+
+
+/** Search for suitable enc-file and read its encoding information.
+ *  The file contents must be a valid PostScript vector with 256 entries. */
+void FontEncoding::read () {
+	if (const char *p = path()) {
+		ifstream ifs(p);
+		read(ifs);
+	}
+	else
+		Message::mstream(true) << "encoding file '" << _encname << ".enc' not found\n";
+}
+
+
+/** Read encoding information from stream. */
+void FontEncoding::read (istream &is) {
+	StreamInputBuffer ib(is, 256);
+	BufferInputReader in(ib);
+	_table.resize(256);
+
+	// find beginning of vector
+	while (!in.eof()) {
+		in.skipSpace();
+		if (in.peek() == '%')
+			in.skipUntil("\n");
+		else
+			if (in.get() == '[')
+				break;
+	}
+
+	// read vector entries
+	int n=0;
+	while (!in.eof()) {
+		in.skipSpace();
+		if (in.peek() == '%')
+			in.skipUntil("\n");
+		else if (in.peek() == ']') {
+			in.get();
+			break;
+		}
+		else {
+			string entry = read_entry(in);
+			if (entry == ".notdef")
+				entry.clear();
+			if (n < 256)
+				_table[n++] = entry;
+		}
+	}
+	// remove trailing .notdef names
+	for (n--; n > 0 && _table[n].empty(); n--);
+	_table.resize(n+1);
+}
+
+
+static string read_entry (InputReader &in) {
+	string entry;
+	bool accept_slashes=true;
+	while (!in.eof() && ((in.peek() == '/' && accept_slashes) || valid_name_char(in.peek()))) {
+		if (in.peek() != '/')
+			accept_slashes = false;
+		entry += in.get();
+	}
+	if (entry.length() > 1) {
+		// strip leading slashes
+		// According to the PostScript specification, a single slash without further
+		// following characters is a valid name.
+		size_t n=0;
+		while (n < entry.length() && entry[n] == '/')
+			n++;
+		entry = entry.substr(n);
+	}
+	return entry;
+}
+
+
+static bool valid_name_char (int c) {
+	const char *delimiters = "<>(){}[]/~%";
+	return isprint(c) && !isspace(c) && !strchr(delimiters, c);
+}
+
+
+/** Returns an entry of the encoding table.
+ * @param[in] c character code
+ * @return character name assigned to charcter code c*/
+const char* FontEncoding::getEntry (int c) const {
+	if (c >= 0 && (size_t)c < _table.size())
+		return !_table[c].empty() ? _table[c].c_str() : 0;
+	return 0;
+}
+
+
+struct EncodingMap : public map<string, FontEncoding*>
+{
+	~EncodingMap () {
+		for (EncodingMap::iterator it=begin(); it != end(); ++it)
+			delete it->second;
+	}
+};
+
+
+/** Returns the encoding of a font.
+ * @param[in] fontname name of font whose encoding will be returned
+ * @return pointer to encoding object, or 0 if there is no encoding defined */
+FontEncoding* FontEncoding::encoding (const string &fontname) {
+	static EncodingMap encmap;
+	if (const char *encname = FileFinder::lookupEncName(fontname)) {
+      EncodingMap::const_iterator it = encmap.find(encname);
+   	if (it != encmap.end())
+			return it->second;
+		FontEncoding *enc = new FontEncoding(encname);
+		encmap[encname] = enc;
+		return enc;
+	}
+	return 0;
+}
+