1 files changed, 71 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/subprograms/network_driver.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/subprograms/network_driver.vhd
new file mode 100644
index 000000000..02461c8d0
--- /dev/null
+++ b/testsuite/vests/vhdl-ams/ashenden/compliant/subprograms/network_driver.vhd
@@ -0,0 +1,71 @@
+
+-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+-- for more details. 
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+entity network_driver is
+end entity network_driver;
+
+
+architecture test of network_driver is
+
+  constant target_host_id : natural := 10;
+  constant my_host_id : natural := 5;
+  type pkt_types is (control_pkt, other_pkt);
+  type pkt_header is record
+      dest, src : natural;
+      pkt_type : pkt_types;
+      seq : natural;
+    end record;
+
+begin
+
+  -- code from book
+
+  network_driver : process is
+
+    constant seq_modulo : natural := 2**5;
+    subtype seq_number is natural range 0 to seq_modulo-1;
+    variable next_seq_number : seq_number := 0;
+    -- . . .
+    -- not in book
+    variable new_header : pkt_header;
+    -- end not in book
+
+    impure function generate_seq_number return seq_number is
+      variable number : seq_number;
+    begin
+      number := next_seq_number;
+      next_seq_number := (next_seq_number + 1) mod seq_modulo;
+      return number;
+    end function generate_seq_number;
+
+  begin  -- network_driver
+    -- not in book
+    wait for 10 ns;
+    -- end not in book
+    -- . . .
+    new_header := pkt_header'( dest => target_host_id,
+                               src => my_host_id,
+                               pkt_type => control_pkt,
+                               seq => generate_seq_number );
+    -- . . .
+  end process network_driver;
+
+  -- end code from book
+
+end architecture test;