Add hello_world example

Author: Vladimir Karnushin

examples/CMakeLists.txt

@@ -1,3 +1,4 @@
 add_subdirectory (performance_test)
 add_subdirectory (message_printer)
+add_subdirectory (hello_world)
 # add_subdirectory (Model)

examples/hello_world/CMakeLists.txt

@@ -0,0 +1,13 @@
+#########################################################################
+#  The following lines shows how to write CMakeLists.txt for mFAST applications
+#  when the applications are not in the mFAST source tree.
+##########################################################################
+
+# cmake_minimum_required(VERSION 2.8)
+# find_package(mFAST REQUIRED COMPONENTS coder)
+#
+# include_directories(${MFAST_INCLUDE_DIR})
+# link_directories(${MFAST_LIBRARY_DIRS})
+
+add_executable (hello_world hello_world.cpp)
+target_link_libraries (hello_world ${MFAST_LIBRARIES})

examples/hello_world/hello_world.cpp

@@ -0,0 +1,72 @@
+#include <iostream>
+#include <string>
+
+#include <mfast.h>
+#include <mfast/coder/fast_decoder.h>
+#include <mfast/json/json.h>
+#include <mfast/xml_parser/dynamic_templates_description.h>
+
+using std::string;
+using std::ostringstream;
+using std::cout;
+using std::endl;
+
+using mfast::templates_description;
+using mfast::dynamic_templates_description;
+using mfast::fast_decoder;
+using mfast::message_cref;
+using mfast::ascii_string_cref;
+using mfast::json::encode;
+
+// example from http://jettekfix.com/node/36
+static const string fast_template =
+    "\
+<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\
+<templates xmlns=\"http://www.fixprotocol.org/ns/fast/td/1.1\">\
+    <template dictionary=\"1\" id=\"1\" name=\"HelloWorld\">\
+         <string id=\"58\" name=\"Text\">\
+             <default value=\"\"></default>\
+         </string>\
+    </template>\
+</templates>\
+";
+
+// 58=HelloWorld<SOH>
+static const string fast_message =
+    "\xE0\x81\x48\x65\x6C\x6C\x6F\x57\x6F\x72\x6C\xE4";
+
+int main() {
+  dynamic_templates_description description(fast_template);
+
+  const templates_description* descriptions[] = {&description};
+
+  fast_decoder decoder;
+  decoder.include(descriptions);
+
+  const char* start = fast_message.c_str();
+  const char* end = start + fast_message.length();
+
+  cout << "Decoding message \"58=HelloWorld<SOH>\":" << endl;
+  cout << endl;
+
+  message_cref msg = decoder.decode(start, end);
+
+  cout << "Template id: " << msg.id() << endl;
+  cout << "Template name: " << msg.name() << endl;
+  cout << endl;
+
+  ascii_string_cref field = static_cast<ascii_string_cref>((msg)[0]);
+
+  cout << "Field id: " << field.id() << endl;
+  cout << "Field name: " << field.name() << endl;
+  cout << "Field content: " << field.c_str() << endl;
+  cout << endl;
+
+  cout << "Encoding message to JSON:" << endl;
+
+  ostringstream json_message;
+  bool result = encode(json_message, msg, 0);
+  if (result) cout << "Success: " << json_message.str() << endl;
+
+  return 0;
+}