From 388f5d13abce7330e46ad2cc376d59f62ea7b4e6 Mon Sep 17 00:00:00 2001
From: Bill Somerville <g4wjs@classdesign.com>
Date: Wed, 16 Aug 2017 12:10:50 +0000
Subject: [PATCH] Better detection of allsign from general calls (CQ, QRZ ...)

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8027 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
---
 decodedtext.cpp | 30 ++----------------------------
 1 file changed, 2 insertions(+), 28 deletions(-)

diff --git a/decodedtext.cpp b/decodedtext.cpp
index e81ea1d39..841f6ef53 100644
--- a/decodedtext.cpp
+++ b/decodedtext.cpp
@@ -3,40 +3,14 @@
 #include <QStringList>
 #include <QRegularExpression>
 
-
 extern "C" {
   bool stdmsg_(const char* msg, int len);
 }
 
 QString DecodedText::CQersCall()
 {
-    // extract the CQer's call   TODO: does this work with all call formats?
-  int s1 {0};
-  int position;
-  QString t=_string;
-  if ((position = _string.indexOf (" CQ DX ")) >= 0)
-    {
-      s1 = 7 + position;
-    }
-  else if ((position = _string.indexOf (" CQDX ")) >= 0)
-    {
-      s1 = 6 + position;
-    }
-  else if ((position = _string.indexOf (" CQ ")) >= 0)
-    {
-      s1 = 4 + position;
-      if(_string.mid(s1,3).toInt() > 0 and _string.mid(s1,3).toInt() <= 999) s1 += 4;
-    }
-  else if ((position = _string.indexOf (" DE ")) >= 0)
-    {
-      s1 = 4 + position;
-    }
-  else if ((position = _string.indexOf (" QRZ ")) >= 0)
-    {
-      s1 = 5 + position;
-    }
-  auto s2 = _string.indexOf (" ", s1);
-  return _string.mid (s1, s2 - s1);
+  QRegularExpression callsign_re {R"(\s(CQ|DE|QRZ)(\s?DX|\s([A-Z]{2}|\d{3}))?\s(?<callsign>[A-Z0-9/]{2,})(\s[A-R]{2}[0-9]{2})?)"};
+  return callsign_re.match (_string).captured ("callsign");
 }