From c5b8afab0f409b06a63599ff1c5acb433f3957d4 Mon Sep 17 00:00:00 2001
From: Julian Andres Klode <jak@debian.org>
Date: Tue, 17 Jan 2017 00:07:09 +0100
Subject: strutl: Provide an APT::String::Join() function

Thanks: James Clarke <jrtc27@jrtc27.com> for the implementation
Gbp-Dch: ignore
---
 apt-pkg/contrib/strutl.cc | 12 ++++++++++++
 apt-pkg/contrib/strutl.h  |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc
index cf8feb970..da0121eca 100644
--- a/apt-pkg/contrib/strutl.cc
+++ b/apt-pkg/contrib/strutl.cc
@@ -27,6 +27,7 @@
 #include <locale>
 #include <sstream>
 #include <string>
+#include <sstream>
 #include <vector>
 
 #include <stddef.h>
@@ -85,6 +86,17 @@ bool Startswith(const std::string &s, const std::string &start)
    return (s.compare(0, start.size(), start) == 0);
 }
 
+std::string Join(std::vector<std::string> list, const std::string &sep)
+{
+   std::ostringstream oss;
+   for (auto it = list.begin(); it != list.end(); it++)
+   {
+      if (it != list.begin()) oss << sep;
+      oss << *it;
+   }
+   return oss.str();
+}
+
 }
 }
 									/*}}}*/
diff --git a/apt-pkg/contrib/strutl.h b/apt-pkg/contrib/strutl.h
index 918ac89c7..73f27aa6c 100644
--- a/apt-pkg/contrib/strutl.h
+++ b/apt-pkg/contrib/strutl.h
@@ -44,6 +44,8 @@ namespace APT {
       std::string Strip(const std::string &s);
       bool Endswith(const std::string &s, const std::string &ending);
       bool Startswith(const std::string &s, const std::string &starting);
+      std::string Join(std::vector<std::string> list, const std::string &sep);
+
    }
 }
 
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