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glibc/string/tst-endian.c
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#include <byteswap.h> | |
#include <endian.h> | |
#include <inttypes.h> | |
#include <stdio.h> | |
#include <stdint.h> | |
#include <libc-internal.h> | |
#if __GNUC_PREREQ (6, 0) | |
/* GCC 6.0 warns on big endian systems about: | |
htobeXX (beXXtoh (i)) != i | |
warning: self-comparison always evaluates to false [-Wtautological-compare] | |
because htobeXX(x) and beXXtoh(x) is defined to (x) | |
in string/endian.h on big endian systems. | |
The same applies to htoleXX/leXXtoh on little endian systems. */ | |
# define DIAG_IGNORE_NEEDS_COMMENT_TAUTOLOGICAL_COMPARE() \ | |
DIAG_IGNORE_NEEDS_COMMENT (6, "-Wtautological-compare") | |
#else | |
# define DIAG_IGNORE_NEEDS_COMMENT_TAUTOLOGICAL_COMPARE() | |
#endif | |
static int | |
do_test (void) | |
{ | |
int result = 0; | |
for (uint64_t i = 0; i < (~UINT64_C (0)) >> 2; i = (i << 1) + 3) | |
{ | |
if (i < UINT64_C (65536)) | |
{ | |
DIAG_PUSH_NEEDS_COMMENT; | |
DIAG_IGNORE_NEEDS_COMMENT_TAUTOLOGICAL_COMPARE (); | |
if (htobe16 (be16toh (i)) != i) | |
{ | |
printf ("htobe16 (be16toh (%" PRIx64 ")) == %" PRIx16 "\n", | |
i, (uint16_t) htobe16 (be16toh (i))); | |
result = 1; | |
} | |
if (htole16 (le16toh (i)) != i) | |
{ | |
printf ("htole16 (le16toh (%" PRIx64 ")) == %" PRIx16 "\n", | |
i, (uint16_t) htole16 (le16toh (i))); | |
result = 1; | |
} | |
DIAG_POP_NEEDS_COMMENT; | |
uint16_t n[2]; | |
n[__BYTE_ORDER == __LITTLE_ENDIAN] = bswap_16 (i); | |
n[__BYTE_ORDER == __BIG_ENDIAN] = i; | |
if (htole16 (i) != n[0]) | |
{ | |
printf ("htole16 (%" PRIx64 ") == %" PRIx16 " != %" PRIx16 "\n", | |
i, (uint16_t) htole16 (i), n[0]); | |
result = 1; | |
} | |
if (htobe16 (i) != n[1]) | |
{ | |
printf ("htobe16 (%" PRIx64 ") == %" PRIx16 " != %" PRIx16 "\n", | |
i, (uint16_t) htobe16 (i), n[1]); | |
result = 1; | |
} | |
} | |
if (i < UINT64_C (4294967296)) | |
{ | |
DIAG_PUSH_NEEDS_COMMENT; | |
DIAG_IGNORE_NEEDS_COMMENT_TAUTOLOGICAL_COMPARE (); | |
if (htobe32 (be32toh (i)) != i) | |
{ | |
printf ("htobe32 (be32toh (%" PRIx64 ")) == %" PRIx32 "\n", | |
i, (uint32_t) htobe32 (be32toh (i))); | |
result = 1; | |
} | |
if (htole32 (le32toh (i)) != i) | |
{ | |
printf ("htole32 (le32toh (%" PRIx64 ")) == %" PRIx32 "\n", | |
i, (uint32_t) htole32 (le32toh (i))); | |
result = 1; | |
} | |
DIAG_POP_NEEDS_COMMENT; | |
uint32_t n[2]; | |
n[__BYTE_ORDER == __LITTLE_ENDIAN] = bswap_32 (i); | |
n[__BYTE_ORDER == __BIG_ENDIAN] = i; | |
if (htole32 (i) != n[0]) | |
{ | |
printf ("htole32 (%" PRIx64 ") == %" PRIx32 " != %" PRIx32 "\n", | |
i, (uint32_t) htole32 (i), n[0]); | |
result = 1; | |
} | |
if (htobe32 (i) != n[1]) | |
{ | |
printf ("htobe32 (%" PRIx64 ") == %" PRIx32 " != %" PRIx32 "\n", | |
i, (uint32_t) htobe32 (i), n[1]); | |
result = 1; | |
} | |
} | |
DIAG_PUSH_NEEDS_COMMENT; | |
DIAG_IGNORE_NEEDS_COMMENT_TAUTOLOGICAL_COMPARE (); | |
if (htobe64 (be64toh (i)) != i) | |
{ | |
printf ("htobe64 (be64toh (%" PRIx64 ")) == %" PRIx64 "\n", | |
i, htobe64 (be64toh (i))); | |
result = 1; | |
} | |
if (htole64 (le64toh (i)) != i) | |
{ | |
printf ("htole64 (le64toh (%" PRIx64 ")) == %" PRIx64 "\n", | |
i, htole64 (le64toh (i))); | |
result = 1; | |
} | |
DIAG_POP_NEEDS_COMMENT; | |
uint64_t n[2]; | |
n[__BYTE_ORDER == __LITTLE_ENDIAN] = bswap_64 (i); | |
n[__BYTE_ORDER == __BIG_ENDIAN] = i; | |
if (htole64 (i) != n[0]) | |
{ | |
printf ("htole64 (%" PRIx64 ") == %" PRIx64 " != %" PRIx64 "\n", | |
i, htole64 (i), n[0]); | |
result = 1; | |
} | |
if (htobe64 (i) != n[1]) | |
{ | |
printf ("htobe64 (%" PRIx64 ") == %" PRIx64 " != %" PRIx64 "\n", | |
i, htobe64 (i), n[1]); | |
result = 1; | |
} | |
} | |
return result; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |