added Addresses class to parse a comma separated list of addresses

include/addresses.h

@@ -0,0 +1,100 @@
+/**
+ *  Addresses.h
+ *  
+ *  Class that contains multiple addresses
+ * 
+ *  @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
+ *  @copyright 2017 Copernica BV
+ */
+
+/**
+ *  Include guard
+ */
+#pragma once
+
+/**
+ *  Begin of namespace
+ */
+namespace AMQP {
+    
+/**
+ *  Class definition
+ */
+class Addresses
+{
+private:
+    /**
+     *  The actual addresses
+     *  @var std::vector<Address>
+     */
+    std::vector<Address> _addresses;
+
+public:
+    /**
+     *  Constructor for a comma separated list
+     *  @param  buffer
+     *  @param  size
+     *  @throws std::runtime_error
+     */
+    Addresses(const char *buffer, size_t size)
+    {
+        // keep looping
+        while (true)
+        {
+            // look for the comma
+            const char *comma = memchr(buffer, ',', size);
+            
+            // stop if there is no comma
+            if (comma == nullptr) break;
+            
+            // size of the address
+            size_t addresssize = comma - buffer - 1;
+            
+            // add address
+            _addresses.emplace_back(buffer, addresssize);
+            
+            // update for next iteration
+            buffer += addresssize + 1;
+            size -= addresssize + 1;
+        }
+        
+        // do we have more?
+        if (size > 0) _addresses.emplace_back(buffer, size);
+        
+        // was anything found?
+        if (_addresses.size() > 0) return;
+        
+        // no addresses found
+        throw std::runtime_error("no addresses");
+    }
+
+    /**
+     *  Destructed
+     */
+    virtual ~Addresses() = default;
+    
+    /**
+     *  Number of addresses
+     *  @return size_t
+     */
+    size_t size() const
+    {
+        return _addresses.size();
+    }
+    
+    /**
+     *  Expose an address by index
+     *  @param  index
+     *  @return Address
+     */
+    const Address &operator[](size_t index) const
+    {
+        return _addresses.at(index);
+    }
+};
+
+/**
+ *  End of namespace
+ */
+}
+