* add message::append() method to mitigate zeromq#204

* add message::operator<< for message (AKA append) and for frame
* tests for new methods
* fix indent

src/tests/test_message.cpp

@@ -136,6 +136,52 @@ BOOST_AUTO_TEST_CASE( copyable )
 	BOOST_CHECK_EQUAL("string", second.get(0));
 }
 
+BOOST_AUTO_TEST_CASE( append_all )
+{
+	zmqpp::message second;
+	second.add("second");
+	BOOST_CHECK_EQUAL(1, second.parts());
+
+	{
+		zmqpp::message first;
+		first.add("string");
+		first.add("string2");
+		first.add("string3");
+		BOOST_CHECK_EQUAL(3, first.parts());
+
+		second.append(first);
+	}
+
+	BOOST_REQUIRE_EQUAL(4, second.parts());
+	BOOST_CHECK_EQUAL(strlen("second"), second.size(0));
+	BOOST_CHECK_EQUAL("second", second.get(0));
+	BOOST_CHECK_EQUAL("string", second.get(1));
+	BOOST_CHECK_EQUAL("string2", second.get(2));
+	BOOST_CHECK_EQUAL("string3", second.get(3));
+}
+
+BOOST_AUTO_TEST_CASE( append_partial )
+{
+	zmqpp::message second;
+	second.add("second");
+	BOOST_CHECK_EQUAL(1, second.parts());
+
+	{
+		zmqpp::message first;
+		first.add("string");
+		first.add("string2");
+		first.add("string3");
+		BOOST_CHECK_EQUAL(3, first.parts());
+
+		second.append(first,1,2);
+	}
+
+	BOOST_REQUIRE_EQUAL(2, second.parts());
+	BOOST_CHECK_EQUAL(strlen("second"), second.size(0));
+	BOOST_CHECK_EQUAL("second", second.get(0));
+	BOOST_CHECK_EQUAL("string2", second.get(1));
+}
+
 #ifndef ZMQPP_IGNORE_LAMBDA_FUNCTION_TESTS
 BOOST_AUTO_TEST_CASE( move_part )
 {
@@ -365,6 +411,35 @@ BOOST_AUTO_TEST_CASE( stream_copy_input_string )
 	BOOST_CHECK_EQUAL("test part", message.get(0));
 }
 
+BOOST_AUTO_TEST_CASE( stream_copy_input_message )
+{
+	zmqpp::message message("test msg1", "test msg1.2");
+	zmqpp::message message2("test msg2", "test msg2.1");
+
+	message << message2;
+
+	BOOST_REQUIRE_EQUAL(4, message.parts());
+	BOOST_CHECK_EQUAL(strlen("test msg1"), message.size(0));
+	BOOST_CHECK_EQUAL("test msg1", message.get(0));
+	BOOST_CHECK_EQUAL("test msg1.2", message.get(1));
+	BOOST_CHECK_EQUAL("test msg2", message.get(2));
+	BOOST_CHECK_EQUAL("test msg2.1", message.get(3));
+}
+
+BOOST_AUTO_TEST_CASE( stream_copy_input_frame )
+{
+	zmqpp::message message("test msg1", "test msg1.2");
+	zmqpp::frame aframe("test msg2.1",strlen("test msg2.1"));
+
+	message << aframe;
+
+	BOOST_REQUIRE_EQUAL(3, message.parts());
+	BOOST_CHECK_EQUAL(strlen("test msg1"), message.size(0));
+	BOOST_CHECK_EQUAL("test msg1", message.get(0));
+	BOOST_CHECK_EQUAL("test msg1.2", message.get(1));
+	BOOST_CHECK_EQUAL("test msg2.1", message.get(2));
+}
+
 BOOST_AUTO_TEST_CASE( stream_multiple_parts )
 {
 	zmqpp::message message;

src/zmqpp/message.cpp

@@ -152,11 +152,11 @@ void message::get(int64_t& integer, size_t const part) const
 
 void message::get(signal &sig, size_t const part) const
 {
-    assert(sizeof(signal) == size(part));
-    int64_t v;
-    get(v, part);
-    
-    sig = static_cast<signal>(v);
+	assert(sizeof(signal) == size(part));
+	int64_t v;
+	get(v, part);
+
+	sig = static_cast<signal>(v);
 }
 
 void message::get(uint8_t& unsigned_integer, size_t const part) const
@@ -466,6 +466,14 @@ void message::copy(message const& source)
 	//_strings = source._strings
 }
 
+void message::append(message const& source, size_t from, size_t to)
+{
+	if(to == 0) to = source.parts();
+	_parts.reserve( _parts.size() + to - from );
+	for(size_t part=from; part<to; ++part)
+		push_back(source.raw_data(part), source.size(part));
+}
+
 // Used for internal tracking
 void message::sent(size_t const part)
 {

src/zmqpp/message.hpp

@@ -159,6 +159,12 @@ class ZMQPP_EXPORT message
 		_parts.push_back( frame( part, data_size ) );
 	}
 
+	//specialization for common add_raw. Add copy
+	void add_raw(frame const *a_frame)
+	{
+		_parts.push_back( a_frame->copy() );
+	}
+
 	// Use exact data past, neither zmqpp nor 0mq will copy, alter or delete
 	// this data. It must remain as valid for at least the lifetime of the
 	// 0mq message, recommended only with const data.
@@ -266,6 +272,17 @@ class ZMQPP_EXPORT message
 	message& operator<<(char const* c_string);
 	message& operator<<(std::string const& string);
 
+	message& operator<<(frame const& c_frame)
+	{
+		add_raw(c_frame.data(), c_frame.size());
+		return *this;
+	}
+	message& operator<<(message const& c_message)
+	{
+		append(c_message);
+		return *this;
+	}
+
 	// Queue manipulation
 	void push_front(void const* part, size_t const size);
 
@@ -313,6 +330,10 @@ class ZMQPP_EXPORT message
 	message copy() const;
 	void copy(message const& source);
 
+	// Append (like copy) frames[from..to-1] of source to self
+	// to == 0 -- append till end
+	void append(message const& source, size_t from = 0, size_t to = 0);
+
 	// Used for internal tracking
 	void sent(size_t const part);