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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/tests/include/sys_endian_test.c
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/*-

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 * Copyright (c) 2021 M. Warner Losh <[email protected]>

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 *

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 * SPDX-License-Identifier: BSD-2-Clause

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 */

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#include <sys/endian.h>

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#include <atf-c.h>

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ATF_TC(sys_endian);

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ATF_TC_HEAD(sys_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(sys_endian, tc)

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{

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	/* FreeBSD sys/endian.h 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 defined");

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#endif

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#ifdef bswap_16

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	atf_tc_fail_nonfatal("bswap_16 defined");

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#endif

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#ifdef __bswap_32

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	atf_tc_fail_nonfatal("__bswap_32 defined");

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#endif

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#ifdef bswap_32

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	atf_tc_fail_nonfatal("bswap_32 defined");

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#endif

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#ifdef __bswap_64

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	atf_tc_fail_nonfatal("__bswap_64 defined");

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#endif

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#ifdef bswap_64

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	atf_tc_fail_nonfatal("bswap_64 defined");

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#endif

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	/* FreeBSD sys/endian.h does define bswap{16,32,64} */

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#ifndef bswap16

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	atf_tc_fail_nonfatal("bswap16 not defined");

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#endif

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#ifndef bswap32

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	atf_tc_fail_nonfatal("bswap32 not defined");

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#endif

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#ifndef bswap64

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	atf_tc_fail_nonfatal("bswap64 not defined");

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#endif

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	/*

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	 * FreeBSD defines with one underscore

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	 * We don't test for two since 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 _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, sys_endian);

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	return atf_no_error();

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}

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