--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/3rdparty/vmime/src/vmime/headerField.cpp	Tue Aug 17 11:19:54 2021 +0200
@@ -0,0 +1,324 @@
+//
+// VMime library (http://www.vmime.org)
+// Copyright (C) 2002-2013 Vincent Richard <vincent@vmime.org>
+//
+// 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, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// Linking this library statically or dynamically with other modules is making
+// a combined work based on this library.  Thus, the terms and conditions of
+// the GNU General Public License cover the whole combination.
+//
+
+#include "vmime/headerField.hpp"
+#include "vmime/headerFieldFactory.hpp"
+
+#include "vmime/parserHelpers.hpp"
+
+#include "vmime/exception.hpp"
+
+
+namespace vmime
+{
+
+
+headerField::headerField()
+	: m_name("X-Undefined")
+{
+}
+
+
+headerField::headerField(const string& fieldName)
+	: m_name(fieldName)
+{
+}
+
+
+headerField::~headerField()
+{
+}
+
+
+shared_ptr <component> headerField::clone() const
+{
+	shared_ptr <headerField> field = headerFieldFactory::getInstance()->create(m_name);
+
+	field->copyFrom(*this);
+
+	return (field);
+}
+
+
+void headerField::copyFrom(const component& other)
+{
+	const headerField& hf = dynamic_cast <const headerField&>(other);
+
+	m_value->copyFrom(*hf.m_value);
+}
+
+
+headerField& headerField::operator=(const headerField& other)
+{
+	copyFrom(other);
+	return (*this);
+}
+
+
+shared_ptr <headerField> headerField::parseNext
+	(const parsingContext& ctx, const string& buffer, const size_t position,
+	 const size_t end, size_t* newPosition)
+{
+	size_t pos = position;
+
+	while (pos < end)
+	{
+		char_t c = buffer[pos];
+
+		// Check for end of headers (empty line): although RFC-822 recommends
+		// to use CRLF for header/body separator (see 4.1 SYNTAX), here, we
+		// also check for LF for compatibility with broken implementations...
+		if (c == '\n')
+		{
+			if (newPosition)
+				*newPosition = pos + 1;   // LF: illegal
+
+			return null;
+		}
+		else if (c == '\r' && pos + 1 < end && buffer[pos + 1] == '\n')
+		{
+			if (newPosition)
+				*newPosition = pos + 2;   // CR+LF
+
+			return null;
+		}
+
+		// This line may be a field description
+		if (!parserHelpers::isSpace(c))
+		{
+			const size_t nameStart = pos;  // remember the start position of the line
+
+			while (pos < end && (buffer[pos] != ':' && !parserHelpers::isSpace(buffer[pos])))
+				++pos;
+
+			const size_t nameEnd = pos;
+
+			while (pos < end && (buffer[pos] == ' ' || buffer[pos] == '\t'))
+				++pos;
+
+			if (buffer[pos] != ':')
+			{
+				// Humm...does not seem to be a valid header line.
+				// Skip this error and advance to the next line
+				pos = nameStart;
+
+				while (pos < end && buffer[pos] != '\n')
+					++pos;
+
+				if (pos < end && buffer[pos] == '\n')
+					++pos;
+			}
+			else
+			{
+				// Extract the field name
+				const string name(buffer.begin() + nameStart,
+				                  buffer.begin() + nameEnd);
+
+				// Skip ':' character
+				++pos;
+
+				// Skip spaces between ':' and the field contents
+				while (pos < end && (buffer[pos] == ' ' || buffer[pos] == '\t'))
+					++pos;
+
+				const size_t contentsStart = pos;
+				size_t contentsEnd = 0;
+
+				bool firstLine = true;
+
+				// Parse field value, taking care of line folding (value on multiple lines)
+				for (size_t eol = 0 ; parserHelpers::findEOL(buffer, pos, end, &eol) ; pos = eol)
+				{
+					// If the line does not start with a folding indicator (SPACE or TAB),
+					// and this is not the first line, then stop parsing lines
+					if (!firstLine && !(buffer[pos] == ' ' || buffer[pos] == '\t'))
+						break;
+
+					contentsEnd = eol;
+					firstLine = false;
+				}
+
+				if (pos == end && contentsEnd == 0)
+				{
+					// End of data, and no CRLF was found at the end
+					contentsEnd = end;
+				}
+
+				// Strip spaces from end of header lines
+				while (contentsEnd > contentsStart &&
+				       (buffer[contentsEnd - 1] == ' ' || buffer[contentsEnd - 1] == '\t' ||
+				        buffer[contentsEnd - 1] == '\r' || buffer[contentsEnd - 1] == '\n'))
+				{
+					contentsEnd--;
+				}
+
+				// Return a new field
+				shared_ptr <headerField> field = headerFieldFactory::getInstance()->create(name);
+
+				field->parse(ctx, buffer, contentsStart, contentsEnd, NULL);
+				field->setParsedBounds(nameStart, pos);
+
+				if (newPosition)
+					*newPosition = pos;
+
+				return (field);
+			}
+		}
+		else
+		{
+			// If the line contains only space characters, we assume it is
+			// the end of the headers.
+			while (pos < end && (buffer[pos] == ' ' || buffer[pos] == '\t'))
+				++pos;
+
+			if (pos < end && buffer[pos] == '\n')
+			{
+				if (newPosition)
+					*newPosition = pos + 1;   // LF: illegal
+
+				return null;
+			}
+			else if (pos + 1 < end && buffer[pos] == '\r' && buffer[pos + 1] == '\n')
+			{
+				if (newPosition)
+					*newPosition = pos + 2;   // CR+LF
+
+				return null;
+			}
+
+			// Skip this error and advance to the next line
+			while (pos < end && buffer[pos] != '\n')
+				++pos;
+
+			if (buffer[pos] == '\n')
+				++pos;
+		}
+	}
+
+	if (newPosition)
+		*newPosition = pos;
+
+	return null;
+}
+
+
+void headerField::parseImpl
+	(const parsingContext& ctx, const string& buffer, const size_t position,
+	 const size_t end, size_t* newPosition)
+{
+	m_value->parse(ctx, buffer, position, end, newPosition);
+}
+
+
+void headerField::generateImpl
+	(const generationContext& ctx, utility::outputStream& os,
+	 const size_t curLinePos, size_t* newLinePos) const
+{
+	os << m_name + ": ";
+
+	m_value->generate(ctx, os, curLinePos + m_name.length() + 2, newLinePos);
+}
+
+
+size_t headerField::getGeneratedSize(const generationContext& ctx)
+{
+	return m_name.length() + 2 /* ": " */ + m_value->getGeneratedSize(ctx);
+}
+
+
+const string headerField::getName() const
+{
+	return m_name;
+}
+
+
+void headerField::setName(const string& name)
+{
+	m_name = name;
+}
+
+
+bool headerField::isCustom() const
+{
+	return (m_name.length() > 2 && m_name[0] == 'X' && m_name[1] == '-');
+}
+
+
+const std::vector <shared_ptr <component> > headerField::getChildComponents()
+{
+	std::vector <shared_ptr <component> > list;
+
+	if (m_value)
+		list.push_back(m_value);
+
+	return (list);
+}
+
+
+shared_ptr <const headerFieldValue> headerField::getValue() const
+{
+	return m_value;
+}
+
+
+shared_ptr <headerFieldValue> headerField::getValue()
+{
+	return m_value;
+}
+
+
+void headerField::setValue(shared_ptr <headerFieldValue> value)
+{
+	if (!headerFieldFactory::getInstance()->isValueTypeValid(*this, *value))
+		throw exceptions::bad_field_value_type(getName());
+
+	if (value != NULL)
+		m_value = value;
+}
+
+
+void headerField::setValueConst(shared_ptr <const headerFieldValue> value)
+{
+	if (!headerFieldFactory::getInstance()->isValueTypeValid(*this, *value))
+		throw exceptions::bad_field_value_type(getName());
+
+	m_value = vmime::clone(value);
+}
+
+
+void headerField::setValue(const headerFieldValue& value)
+{
+	if (!headerFieldFactory::getInstance()->isValueTypeValid(*this, value))
+		throw exceptions::bad_field_value_type(getName());
+
+	m_value = vmime::clone(value);
+}
+
+
+void headerField::setValue(const string& value)
+{
+	parse(value);
+}
+
+
+} // vmime