Rule 17.4 - can I reference to an array, inside a struct?

[misra-c]

For MISRA-C:2004, a strict interpretation of the Rule 17.4 provides you with two options

• Raise a deviaion
• Define and use as an array pointer (see below)

Code:

typedef unsigned char uint8_t;
typedef struct s_SomeStruct
{
  uint8_t (*pbuf)[];
  size_t bufsize;
} TSomeStruct;

#define BUFSIZ 10

extern uint8_t buf[ BUFSIZ ];
const TSomeStruct s = { &buf, BUFSIZ }

void main( void )
{
  ...
  (*s.pbuf)[5] = 10u;    /* Example of buffer access */
  ...
}

For MISRA C:2012 this rule has been refined and retargetted as Rule 18.4 to define allowable pointer arithmetic. This would allow what you want to do!