Viewing file:  sso-16.c (2.18 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-require-effective-target int32plus } */
/* { dg-options "-O3" } */
typedef __INT32_TYPE__ int32_t;
#define BIG_ENDIAN __attribute__((scalar_storage_order("big-endian")))
/* host order version (little endian)*/
struct _ip6_addr {
union {
char addr8[16];
int32_t addr32[4];
} u;
};
typedef struct _ip6_addr t_ip6_addr;
struct _net_addr {
char is_v4;
union {
int32_t addr;
t_ip6_addr addr6;
} u;
};
typedef struct _net_addr t_net_addr;
/* big endian version */
struct _be_ip6_addr {
union {
char addr8[16];
} BIG_ENDIAN u;
} BIG_ENDIAN;
typedef struct _be_ip6_addr t_be_ip6_addr;
struct _be_net_addr {
char is_v4;
union {
t_be_ip6_addr addr6;
int32_t addr;
} BIG_ENDIAN u;
} BIG_ENDIAN;
typedef struct _be_net_addr t_be_net_addr;
/* convert */
t_be_ip6_addr be_ip6_addr(const t_ip6_addr ip6)
{
t_be_ip6_addr rc = {
.u.addr8[0] = ip6.u.addr8[0],
.u.addr8[1] = ip6.u.addr8[1],
.u.addr8[2] = ip6.u.addr8[2],
.u.addr8[3] = ip6.u.addr8[3],
.u.addr8[4] = ip6.u.addr8[4],
.u.addr8[5] = ip6.u.addr8[5],
.u.addr8[6] = ip6.u.addr8[6],
.u.addr8[7] = ip6.u.addr8[7],
.u.addr8[8] = ip6.u.addr8[8],
.u.addr8[9] = ip6.u.addr8[9],
.u.addr8[10] = ip6.u.addr8[10],
.u.addr8[11] = ip6.u.addr8[11],
.u.addr8[12] = ip6.u.addr8[12],
.u.addr8[13] = ip6.u.addr8[13],
.u.addr8[14] = ip6.u.addr8[14],
.u.addr8[15] = ip6.u.addr8[15],
};
return rc;
}
t_be_net_addr __attribute__((noipa)) be_net_addr(const t_net_addr ip)
{
t_be_net_addr rc = {.is_v4 = ip.is_v4 };
if (ip.is_v4) {
rc.u.addr = ip.u.addr;
} else {
rc.u.addr6 = be_ip6_addr(ip.u.addr6);
}
return rc;
}
int main(void)
{
t_be_net_addr out = { };
t_net_addr in = {
.is_v4 = 0,
.u.addr6.u.addr8 =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }
};
out = be_net_addr(in);
// actually first 4 bytes are swapped
if (in.u.addr6.u.addr8[0] != out.u.addr6.u.addr8[0])
__builtin_abort();
return 0;
}
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