.. _program_listing_file_block.hpp:

Program Listing for File block.hpp
==================================

|exhale_lsh| :ref:`Return to documentation for file <file_block.hpp>` (``block.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #ifndef FELIX_BLOCK_H_
   #define FELIX_BLOCK_H_
   
   
   #include <cstdint>
   #include <sys/uio.h>
   
   #include "felix/felix_client_status.h"
   
   #define BLOCK_HEADER_SIZE  (4)
   #define MAX_IOV_SIZE (28)       //max max_sge of Connect-X5 is 30
   #define MAX_CHUNK_SIZE  (26624) //27 sub-chunks max to fit in 27 IOV entries
   //#define MAX_BUF_CHUNK_SIZE  (12288)
   
   #define CHUNK_FW_TRUNC FELIX_STATUS_FW_TRUNC
   #define CHUNK_SW_TRUNC FELIX_STATUS_SW_TRUNC
   #define CHUNK_FW_MALF  FELIX_STATUS_FW_MALF
   #define CHUNK_FW_CRC   FELIX_STATUS_FW_CRC
   #define CHUNK_SW_MALF  FELIX_STATUS_SW_MALF
   
   
   struct Block {
       uint32_t elink :11;
       uint32_t sequence_number :5;
       uint16_t marker;
       uint8_t data[1020];
   } __attribute__((packed));
   
   /*
   template <std::size_t block_size>
   struct Block {
       uint32_t elink :11;
       uint32_t sequence_number :5;
       uint16_t marker;
       uint8_t data[block_size-4];
   } __attribute__((packed));
   */
   
   #if REGMAP_VERSION < 0x0500
   union subchunk_trailer_t
   {
       struct
       { // 16-bit trailer
           uint32_t length   : 10;
           uint32_t crcerr   :  1;
           uint32_t err      :  1;
           uint32_t trunc    :  1;
           uint32_t type     :  3;
       } __attribute__((packed)) data;
       uint16_t value;
   };
   
   #else
   union subchunk_trailer_t
   {
       struct
       { // 32-bit trailer
           uint32_t length   : 16;
           uint32_t unused   :  9;
           uint32_t busymask :  1;
           uint32_t crcerr   :  1;
           uint32_t err      :  1;
           uint32_t trunc    :  1;
           uint32_t type     :  3;
       } __attribute__((packed)) data;
       uint32_t value;
   };
   #endif
   
   struct subchunk_t {
       uint32_t pos;
       subchunk_trailer_t trailer;
   };
   
   
   union xl1id_t
   {
       struct {
           uint32_t ec : 24;
           uint8_t ecrc;
       } fields;
       uint32_t xl1id;
   };
   
   
   union bcid_t
   {
       struct {
           uint8_t fmt : 8;
           uint8_t length: 8;
           uint16_t bcid : 12;
           uint8_t reserved : 4;
       } fields;
       uint32_t bc_data;
   } ;
   
   #endif /* FELIX_BLOCK_H_ */