1 #include <scv.h>
  2 
  3 class packet_t {
  4   public : 
  5     sc_uint<8>  addr;
  6     sc_uint<12> data;
  7 };
  8 
  9 SCV_EXTENSIONS(packet_t) {
 10   public:
 11     scv_extensions< sc_uint<8> > addr;
 12     scv_extensions< sc_uint<12> > data;
 13     SCV_EXTENSIONS_CTOR(packet_t) {
 14       SCV_FIELD(addr);
 15       SCV_FIELD(data);
 16     }
 17 };
 18 
 19 int sc_main (int argc, char* argv[]) {
 20   packet_t  pkt; 
 21   pkt.addr = rand();
 22   pkt.data = rand();
 23   int bitwidth = scv_get_extensions(pkt.addr).get_bitwidth();
 24   cout << "Width of addr is "<< bitwidth << endl;
 25   bitwidth = scv_get_extensions(pkt.data).get_bitwidth();
 26   cout << "Width of data is "<< bitwidth << endl;
 27   scv_get_extensions(pkt).print();
 28   return 0;
 29 }

 Width of addr is 8
 Width of data is 12
 {
   addr:103
   data:966
 }

  1 #include <scv.h>
  2 
  3 //enum for one hot coding
  4 enum onehot_t {
  5   STATE_0 = 0, STATE_1 = 1, STATE_2 = 2, STATE_3 = 4,
  6   STATE_4 = 8, STATE_5 = 16, STATE_6 = 32 };
  7 
  8 struct data_t {
  9   sc_uint<8> field;
 10   unsigned   payload[5];
 11   onehot_t   state;
 12 };
 13 
 14 template<>
 15 class scv_extensions<onehot_t> : public scv_enum_base<onehot_t> {
 16   public:
 17     SCV_ENUM_CTOR(onehot_t) {
 18       SCV_ENUM(STATE_0);
 19       SCV_ENUM(STATE_1);
 20       SCV_ENUM(STATE_2);
 21       SCV_ENUM(STATE_3);
 22       SCV_ENUM(STATE_4);
 23       SCV_ENUM(STATE_5);
 24       SCV_ENUM(STATE_6);
 25     }
 26 };
 27 
 28 template<>
 29 class scv_extensions<data_t> : public scv_extensions_base<data_t> {
 30 public:
 31   scv_extensions<sc_uint<8> > field;
 32   scv_extensions<unsigned   [5]> payload;
 33   scv_extensions<onehot_t   > state;
 34   SCV_EXTENSIONS_CTOR(data_t) {
 35     //must be in order
 36     SCV_FIELD(field);
 37     SCV_FIELD(payload);
 38     SCV_FIELD(state);
 39   }
 40 };
 41 
 42 int sc_main (int argc, char* argv[]) {
 43   data_t  data; 
 44   data.field = rand();
 45   for (int i=0; i<5; i++) {
 46     data.payload[i] = rand();
 47   }
 48   data.state = STATE_0;
 49   scv_get_extensions(data).print();
 50   return 0;
 51 }

 {
   field:103
   payload {
     [0]:846930886
     [1]:1681692777
     [2]:1714636915
     [3]:1957747793
     [4]:424238335
   }
   state:STATE_0
 }

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