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ac77b26215
What's required and not required to be defined is complicated. Write
tests to enshrine it:
endian.h and sys/endian.h:
[bl]e{16,32,64}toh
hto[bl]e{16,32,64}
byteswap.h:
{__,}bswap_{16,32,64}
sys/endian.h:
{__,}bswap{16,32,64}
_BYTE_ORDER
_BIG_ENDIAN
_LITTLE_ENDIAN
_PDP_ENDIAN
endian.h:
__BYTE_ORDER
__BIG_ENDIAN
__LITTLE_ENDIAN
__PDP_ENDIAN
__FLOAT_WORD_ORDER
We also ensure that the sys/endian.h conditions hold true when
we include both endian.h and sys/endian.h in either order.
NOT TESTED: deprecated symbols, internal to glibc symbols
Sponsored by: Netflix
Discussed with: markj (made the changes he requested)
Differential Revision: https://reviews.freebsd.org/D32052
139 lines
3.2 KiB
C
139 lines
3.2 KiB
C
/*-
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* Copyright (c) 2021 M. Warner Losh <imp@FreeBSD.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <endian.h>
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#include <atf-c.h>
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ATF_TC(endian);
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ATF_TC_HEAD(endian, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test swapping macros in <byteswap.h>");
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}
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ATF_TC_BODY(endian, tc)
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{
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/* glibc doesn't define the {__,}bswap_{16,32,64} */
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#ifdef __bswap_16
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atf_tc_fail_nonfatal("__bswap_16 improperly defined");
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#endif
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#ifdef bswap_16
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atf_tc_fail_nonfatal("bswap_16 improperly defined");
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#endif
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#ifdef __bswap_32
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atf_tc_fail_nonfatal("__bswap_32 improperly defined");
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#endif
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#ifdef bswap_32
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atf_tc_fail_nonfatal("bswap_32 improperly defined");
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#endif
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#ifdef __bswap_64
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atf_tc_fail_nonfatal("__bswap_64 improperly defined");
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#endif
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#ifdef bswap_64
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atf_tc_fail_nonfatal("bswap_64 improperly defined");
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#endif
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/* glibc doesn't define bswap{16,32,64} */
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#ifdef bswap16
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atf_tc_fail_nonfatal("bswap16 improperly defined");
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#endif
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#ifdef bswap32
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atf_tc_fail_nonfatal("bswap32 improperly defined");
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#endif
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#ifdef bswap64
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atf_tc_fail_nonfatal("bswap64 improperly defined");
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#endif
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/*
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* glibc defines with two underscores. We don't test for only one since
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* that doesn't interfere.
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*/
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#ifndef __BIG_ENDIAN
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atf_tc_fail_nonfatal("__BIG_ENDIAN not defined");
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#endif
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#ifndef __LITTLE_ENDIAN
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atf_tc_fail_nonfatal("__LITTLE_ENDIAN not defined");
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#endif
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#ifndef __PDP_ENDIAN
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atf_tc_fail_nonfatal("__PDP_ENDIAN not defined");
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#endif
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#ifndef __FLOAT_WORD_ORDER
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atf_tc_fail_nonfatal("__FLOAT_WORD_ORDER not defined");
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#endif
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#ifndef __BYTE_ORDER
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atf_tc_fail_nonfatal("__BYTE_ORDER not defined");
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#endif
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/* order to host */
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#ifdef __BYTE_ORDER
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#if __BYTE_ORDER == __BIG_ENDIAN
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#define H16(x) be16toh(x)
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#define H32(x) be32toh(x)
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#define H64(x) be64toh(x)
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#define O16(x) le16toh(x)
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#define O32(x) le32toh(x)
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#define O64(x) le64toh(x)
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#else
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#define H16(x) le16toh(x)
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#define H32(x) le32toh(x)
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#define H64(x) le64toh(x)
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#define O16(x) be16toh(x)
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#define O32(x) be32toh(x)
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#define O64(x) be64toh(x)
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#endif
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#endif
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ATF_REQUIRE(H16(0x1234) == 0x1234);
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ATF_REQUIRE(H32(0x12345678ul) == 0x12345678ul);
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ATF_REQUIRE(H64(0x123456789abcdef0ull) == 0x123456789abcdef0ull);
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ATF_REQUIRE(O16(0x1234) == __bswap16(0x1234));
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ATF_REQUIRE(O32(0x12345678ul) == __bswap32(0x12345678ul));
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ATF_REQUIRE(O64(0x123456789abcdef0ull) == __bswap64(0x123456789abcdef0ull));
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#undef H16
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#undef H32
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#undef H64
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#undef O16
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#undef O32
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#undef O64
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/* host to order */
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#ifdef __BYTE_ORDER
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#if __BYTE_ORDER == __BIG_ENDIAN
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#define H16(x) htobe16(x)
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#define H32(x) htobe32(x)
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#define H64(x) htobe64(x)
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#define O16(x) htole16(x)
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#define O32(x) htole32(x)
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#define O64(x) htole64(x)
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#else
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#define H16(x) htole16(x)
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#define H32(x) htole32(x)
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#define H64(x) htole64(x)
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#define O16(x) htobe16(x)
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#define O32(x) htobe32(x)
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#define O64(x) htobe64(x)
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#endif
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#endif
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ATF_REQUIRE(H16(0x1234) == 0x1234);
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ATF_REQUIRE(H32(0x12345678ul) == 0x12345678ul);
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ATF_REQUIRE(H64(0x123456789abcdef0ull) == 0x123456789abcdef0ull);
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ATF_REQUIRE(O16(0x1234) == __bswap16(0x1234));
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ATF_REQUIRE(O32(0x12345678ul) == __bswap32(0x12345678ul));
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ATF_REQUIRE(O64(0x123456789abcdef0ull) == __bswap64(0x123456789abcdef0ull));
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#undef H16
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#undef H32
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#undef H64
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#undef O16
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#undef O32
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#undef O64
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, endian);
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return atf_no_error();
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}
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