diff options
Diffstat (limited to 'REORG.TODO/string/tst-endian.c')
| -rw-r--r-- | REORG.TODO/string/tst-endian.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/REORG.TODO/string/tst-endian.c b/REORG.TODO/string/tst-endian.c new file mode 100644 index 0000000000..b156ede199 --- /dev/null +++ b/REORG.TODO/string/tst-endian.c @@ -0,0 +1,134 @@ +#include <byteswap.h> +#include <endian.h> +#include <inttypes.h> +#include <stdio.h> +#include <stdint.h> +#include <libc-diag.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 + +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; +} + +#include <support/test-driver.c> |