From 3812f2f9bcf40bfffa55735ced1908d258e09f4e Mon Sep 17 00:00:00 2001
From: Joe Taylor <joe@princeton.edu>
Date: Tue, 7 May 2024 09:10:57 -0400
Subject: [PATCH] Add code to support use of SuperFox digital signatures.

---
 commons.h              | 1 +
 lib/decoder.f90        | 4 ++--
 lib/jt9com.f90         | 1 +
 widgets/mainwindow.cpp | 7 +++++--
 4 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/commons.h b/commons.h
index 43fab1bcb..b5d406b2f 100644
--- a/commons.h
+++ b/commons.h
@@ -66,6 +66,7 @@ typedef struct dec_data {
     char hisgrid[6];
     bool b_even_seq;
     bool b_superfox;
+    int yymmdd;
   } params;
 } dec_data_t;
 
diff --git a/lib/decoder.f90 b/lib/decoder.f90
index 9f677da9a..9501c8bcc 100644
--- a/lib/decoder.f90
+++ b/lib/decoder.f90
@@ -67,7 +67,7 @@ subroutine multimode_decoder(ss,id2,params,nfsample)
   ntr0=params%ntr
   rms=sqrt(dot_product(float(id2(1:180000)),                         &
        float(id2(1:180000)))/180000.0)
-  if(rms.lt.3.0) go to 800
+  if(rms.lt.0.5) go to 800
 
   !cast C character arrays to Fortran character strings
   datetime=transfer(params%datetime, datetime)
@@ -143,7 +143,7 @@ subroutine multimode_decoder(ss,id2,params,nfsample)
         if(params%nzhsym.lt.50) go to 800
 ! Call the superFox decoder
         open(47,file='fort.47',status='unknown',access='stream')
-        write(47) params%nutc,id2(1:20),id2(1:180000)
+        write(47) params%yymmdd,params%nutc,id2(1:20),id2(1:180000)
         close(47)
         call execute_command_line('.\sfrx fort.47')
      else
diff --git a/lib/jt9com.f90 b/lib/jt9com.f90
index a156e9862..3012a424d 100644
--- a/lib/jt9com.f90
+++ b/lib/jt9com.f90
@@ -49,6 +49,7 @@
      character(kind=c_char) :: hisgrid(6)
      logical(c_bool) :: b_even_seq
      logical(c_bool) :: b_superfox
+     integer(c_int) :: yymmdd
   end type params_block
 
   type, bind(C) :: dec_data
diff --git a/widgets/mainwindow.cpp b/widgets/mainwindow.cpp
index 3e2c3f8a3..927d3d2eb 100644
--- a/widgets/mainwindow.cpp
+++ b/widgets/mainwindow.cpp
@@ -3132,6 +3132,7 @@ void MainWindow::read_wav_file (QString const& fname)
           dec_data.params.newdat = 0;
         }
 
+        dec_data.params.yymmdd=basename.left(6).toInt();
         if(basename.mid(0,10)=="000000_000" && m_mode == "FT8") {
           int isec=15*basename.mid(10,3).toInt();
           int ih=isec/3600;
@@ -3406,8 +3407,10 @@ void MainWindow::decode()                                       //decode()
     m_dateTimeLastTX = now.addSecs(-900);
     dec_data.params.lapcqonly=true;
   }
-  if( m_diskData ) {
+  if(m_diskData) {
     dec_data.params.lapcqonly=false;
+  } else {
+    dec_data.params.yymmdd=-1;
   }
   if(!m_dataAvailable or m_TRperiod==0.0) return;
   ui->DecodeButton->setChecked (true);
@@ -10940,7 +10943,7 @@ void MainWindow::sfox_tx()
   auto fname {QDir::toNativeSeparators(m_config.writeable_data_dir().absoluteFilePath("sfox_1.dat")).toLocal8Bit()};
   QStringList args{fname};
   args.append(m_config.FoxKey());
-  qDebug() << "aa" << args;
+//  qDebug() << "aa" << args;
   p2.start(QDir::toNativeSeparators(m_appDir)+QDir::separator()+"sftx", args);
   p2.waitForFinished();
   auto fname2 {QDir::toNativeSeparators(m_config.writeable_data_dir().absoluteFilePath("sfox_2.dat")).toLocal8Bit()};