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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
76 lines
1.7 KiB
C
76 lines
1.7 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 <byteswap.h>
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#include <atf-c.h>
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ATF_TC(byteswap);
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ATF_TC_HEAD(byteswap, 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(byteswap, tc)
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{
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uint16_t ui16;
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uint32_t ui32;
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uint64_t ui64;
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/* glibc defines the {__,}bswap_{16,32,64} */
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#ifndef __bswap_16
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atf_tc_fail_nonfatal("__bswap_16 not defined");
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#endif
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#ifndef bswap_16
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atf_tc_fail_nonfatal("bswap_16 not defined");
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#endif
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#ifndef __bswap_32
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atf_tc_fail_nonfatal("__bswap_32 not defined");
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#endif
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#ifndef bswap_32
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atf_tc_fail_nonfatal("bswap_32 not defined");
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#endif
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#ifndef __bswap_64
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atf_tc_fail_nonfatal("__bswap_64 not defined");
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#endif
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#ifndef bswap_64
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atf_tc_fail_nonfatal("bswap_64 not defined");
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#endif
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/* glibc does not 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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ui16 = 0x1234;
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ATF_REQUIRE_MSG(0x3412 == bswap_16(ui16),
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"bswap16(%#x) != 0x3412 instead %#x\n", ui16, bswap_16(ui16));
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ui32 = 0x12345678ul;
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ATF_REQUIRE_MSG(0x78563412ul == bswap_32(ui32),
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"bswap32(%#lx) != 0x78563412 instead %#lx\n",
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(unsigned long)ui32, (unsigned long)bswap_32(ui32));
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ui64 = 0x123456789abcdef0ull;
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ATF_REQUIRE_MSG(0xf0debc9a78563412ull == bswap_64(ui64),
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"bswap64(%#llx) != 0x3412 instead %#llx\n",
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(unsigned long long)ui64, (unsigned long long)bswap_64(ui64));
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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, byteswap);
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return atf_no_error();
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}
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