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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/string/tst-endian.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.gz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.xz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.zip |
Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
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> |