Add json support in packet.c

GuoWenxue

2022-04-29 8bdd4bb9f08e38b61b47caa5aa50d6912772b289

 apue/project_socket/src/packet.c

@@ -50,7 +50,7 @@
   return 0;
}

int packet_string_pack(pack_info_t *pack_info, char *pack_buf, int size)
int packet_segmented_pack(pack_info_t *pack_info, char *pack_buf, int size)
{
   if( !pack_info || !pack_buf || size<=0 )
   {
@@ -58,10 +58,29 @@
      return -1;
   }

    memset(pack_buf, 0, size);

   snprintf(pack_buf, size, "%s|%s|%d.%d", pack_info->devid, pack_info->strtime, 
         temper_integer(pack_info->temper), temper_fract(pack_info->temper));

   return strlen(pack_buf);
}

int packet_json_pack(pack_info_t *pack_info, char *pack_buf, int size)
{
   if( !pack_info || !pack_buf || size<=0 )
   {
      log_error("Invalid input arguments\n");
      return -1;
   }

    memset(pack_buf, 0, size);

   snprintf(pack_buf, size, "{\"devid\":\"%s\", \"time\":\"%s\",\"temperature\":\"%d.%d\"}",
            pack_info->devid, pack_info->strtime,
            temper_integer(pack_info->temper), temper_fract(pack_info->temper));

   return strlen(pack_buf);
}