Retrieve updatable packages

1 files changed, 30 insertions, 0 deletions

diff --git a/src/package.cpp b/src/package.cpp
index 0734a5e..9fc99e4 100644
--- a/src/package.cpp
+++ b/src/package.cpp
@@ -73,4 +73,34 @@ namespace katja
         }
         return packages;
     }
+
+    package_exception::package_exception(const std::string& package_name, const std::string& reason) noexcept
+        : m_message(package_name)
+    {
+        m_message.reserve(m_message.size() + 2 + reason.size());
+        m_message += ": " + reason;
+    }
+
+    const std::string_view package_exception::package_name() const noexcept
+    {
+        std::size_t colon_position = m_message.find(':');
+
+        if (colon_position == std::string::npos)
+        {
+            return std::string_view(m_message);
+        }
+        else if (colon_position == 0)
+        {
+            return std::string_view("");
+        }
+        else
+        {
+            return std::string_view(m_message.c_str(), colon_position - 1);
+        }
+    }
+
+    const char *package_exception::what() const noexcept
+    {
+        return m_message.c_str();
+    }
 }