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-rw-r--r--butl/sendmail.cxx40
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diff --git a/butl/sendmail.cxx b/butl/sendmail.cxx
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+// file : butl/sendmail.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license : MIT; see accompanying LICENSE file
+
+#include <butl/sendmail>
+
+using namespace std;
+
+namespace butl
+{
+ void sendmail::
+ headers (const std::string& from,
+ const std::string& subj,
+ const recipients_type& to,
+ const recipients_type& cc,
+ const recipients_type& bcc)
+ {
+ if (!from.empty ())
+ out << "From: " << from << endl;
+
+ auto rcp =[this] (const char* h, const recipients_type& rs)
+ {
+ if (!rs.empty ())
+ {
+ bool f (true);
+ out << h << ": ";
+ for (const string& r: rs)
+ out << (f ? (f = false, "") : ", ") << r;
+ out << endl;
+ }
+ };
+
+ rcp ("To", to);
+ rcp ("Cc", cc);
+ rcp ("Bcc", bcc);
+
+ out << "Subject: " << subj << endl
+ << endl; // Header/body separator.
+ }
+}