/* Test nan functions payload handling (bug 16961).
Copyright (C) 2015-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
. */
#define _LIBC_TEST 1
#define __STDC_WANT_IEC_60559_TYPES_EXT__
#include
#include
#include
#include
#include
#include
/* Avoid built-in functions. */
#define WRAP_NAN(FUNC, STR) \
({ const char *volatile wns = (STR); FUNC (wns); })
#define WRAP_STRTO(FUNC, STR) \
({ const char *volatile wss = (STR); FUNC (wss, NULL); })
#define CHECK_IS_NAN(TYPE, A) \
do \
{ \
if (isnan (A) && !issignaling (A)) \
puts ("PASS: " #TYPE " " #A); \
else \
{ \
puts ("FAIL: " #TYPE " " #A); \
result = 1; \
} \
} \
while (0)
#define CHECK_PAYLOAD(TYPE, FUNC, A, P) \
do \
{ \
if (FUNC (&(A)) == (P)) \
puts ("PASS: " #TYPE " payload " #A); \
else \
{ \
puts ("FAIL: " #TYPE " payload " #A); \
result = 1; \
} \
} \
while (0)
#define CHECK_SAME_NAN(TYPE, A, B) \
do \
{ \
if (memcmp (&(A), &(B), sizeof (A)) == 0) \
puts ("PASS: " #TYPE " " #A " = " #B); \
else \
{ \
puts ("FAIL: " #TYPE " " #A " = " #B); \
result = 1; \
} \
} \
while (0)
#define CHECK_DIFF_NAN(TYPE, A, B) \
do \
{ \
if (memcmp (&(A), &(B), sizeof (A)) != 0) \
puts ("PASS: " #TYPE " " #A " != " #B); \
else \
{ \
puts ("FAIL: " #TYPE " " #A " != " #B); \
result = 1; \
} \
} \
while (0)
#define CLEAR_ERRNO \
do \
{ \
errno = 12345; \
} \
while (0)
#define CHECK_ERRNO(TYPE, A) \
do \
{ \
if (errno == 12345) \
puts ("PASS: " #TYPE " " #A " errno"); \
else \
{ \
puts ("FAIL: " #TYPE " " #A " errno"); \
result = 1; \
} \
} \
while (0)
/* Cannot test payloads by memcmp for formats where NaNs have padding
bits. */
#define CAN_TEST_EQ(MANT_DIG) ((MANT_DIG) != 64 && (MANT_DIG) != 106)
#define RUN_TESTS(TYPE, SFUNC, FUNC, PLFUNC, MANT_DIG) \
do \
{ \
CLEAR_ERRNO; \
TYPE n123 = WRAP_NAN (FUNC, "123"); \
CHECK_ERRNO (TYPE, n123); \
CHECK_IS_NAN (TYPE, n123); \
CLEAR_ERRNO; \
TYPE s123 = WRAP_STRTO (SFUNC, "NAN(123)"); \
CHECK_ERRNO (TYPE, s123); \
CHECK_IS_NAN (TYPE, s123); \
CLEAR_ERRNO; \
TYPE n456 = WRAP_NAN (FUNC, "456"); \
CHECK_ERRNO (TYPE, n456); \
CHECK_IS_NAN (TYPE, n456); \
CLEAR_ERRNO; \
TYPE s456 = WRAP_STRTO (SFUNC, "NAN(456)"); \
CHECK_ERRNO (TYPE, s456); \
CHECK_IS_NAN (TYPE, s456); \
CLEAR_ERRNO; \
TYPE nh123 = WRAP_NAN (FUNC, "0x123"); \
CHECK_ERRNO (TYPE, nh123); \
CHECK_IS_NAN (TYPE, nh123); \
CLEAR_ERRNO; \
TYPE sh123 = WRAP_STRTO (SFUNC, "NAN(0x123)"); \
CHECK_ERRNO (TYPE, sh123); \
CHECK_IS_NAN (TYPE, sh123); \
CLEAR_ERRNO; \
TYPE n123x = WRAP_NAN (FUNC, "123)"); \
CHECK_ERRNO (TYPE, n123x); \
CHECK_IS_NAN (TYPE, n123x); \
CLEAR_ERRNO; \
TYPE nemp = WRAP_NAN (FUNC, ""); \
CHECK_ERRNO (TYPE, nemp); \
CHECK_IS_NAN (TYPE, nemp); \
CLEAR_ERRNO; \
TYPE semp = WRAP_STRTO (SFUNC, "NAN()"); \
CHECK_ERRNO (TYPE, semp); \
CHECK_IS_NAN (TYPE, semp); \
CLEAR_ERRNO; \
TYPE sx = WRAP_STRTO (SFUNC, "NAN"); \
CHECK_ERRNO (TYPE, sx); \
CHECK_IS_NAN (TYPE, sx); \
CLEAR_ERRNO; \
TYPE novf = WRAP_NAN (FUNC, "9999999999" \
"99999999999999999999" \
"9999999999"); \
CHECK_ERRNO (TYPE, novf); \
CHECK_IS_NAN (TYPE, novf); \
CLEAR_ERRNO; \
TYPE sovf = WRAP_STRTO (SFUNC, "NAN(9999999999" \
"99999999999999999999" \
"9999999999)"); \
CHECK_ERRNO (TYPE, sovf); \
CHECK_IS_NAN (TYPE, sovf); \
if (CAN_TEST_EQ (MANT_DIG)) \
CHECK_SAME_NAN (TYPE, n123, s123); \
CHECK_PAYLOAD (TYPE, PLFUNC, n123, 123); \
CHECK_PAYLOAD (TYPE, PLFUNC, s123, 123); \
if (CAN_TEST_EQ (MANT_DIG)) \
CHECK_SAME_NAN (TYPE, n456, s456); \
CHECK_PAYLOAD (TYPE, PLFUNC, n456, 456); \
CHECK_PAYLOAD (TYPE, PLFUNC, s456, 456); \
if (CAN_TEST_EQ (MANT_DIG)) \
CHECK_SAME_NAN (TYPE, nh123, sh123); \
CHECK_PAYLOAD (TYPE, PLFUNC, nh123, 0x123); \
CHECK_PAYLOAD (TYPE, PLFUNC, sh123, 0x123); \
if (CAN_TEST_EQ (MANT_DIG)) \
CHECK_SAME_NAN (TYPE, nemp, semp); \
if (CAN_TEST_EQ (MANT_DIG)) \
CHECK_SAME_NAN (TYPE, n123x, sx); \
CHECK_DIFF_NAN (TYPE, n123, n456); \
CHECK_DIFF_NAN (TYPE, n123, nemp); \
CHECK_DIFF_NAN (TYPE, n123, n123x); \
CHECK_DIFF_NAN (TYPE, n456, nemp); \
CHECK_DIFF_NAN (TYPE, n456, n123x); \
} \
while (0)
static int
do_test (void)
{
int result = 0;
RUN_TESTS (float, strtof, nanf, getpayloadf, FLT_MANT_DIG);
RUN_TESTS (double, strtod, nan, getpayload, DBL_MANT_DIG);
RUN_TESTS (long double, strtold, nanl, getpayloadl, LDBL_MANT_DIG);
#if __HAVE_FLOAT16
RUN_TESTS (_Float16, strtof16, nanf16, getpayloadf16, FLT16_MANT_DIG);
#endif
#if __HAVE_FLOAT32
RUN_TESTS (_Float32, strtof32, nanf32, getpayloadf32, FLT32_MANT_DIG);
#endif
#if __HAVE_FLOAT64
RUN_TESTS (_Float64, strtof64, nanf64, getpayloadf64, FLT64_MANT_DIG);
#endif
#if __HAVE_FLOAT128
RUN_TESTS (_Float128, strtof128, nanf128, getpayloadf128, FLT128_MANT_DIG);
#endif
#if __HAVE_FLOAT32X
RUN_TESTS (_Float32x, strtof32x, nanf32x, getpayloadf32x, FLT32X_MANT_DIG);
#endif
#if __HAVE_FLOAT64X
RUN_TESTS (_Float64x, strtof64x, nanf64x, getpayloadf64x, FLT64X_MANT_DIG);
#endif
#if __HAVE_FLOAT128X
RUN_TESTS (_Float128x, strtof128x, nanf128x, getpayloadf128x,
FLT128X_MANT_DIG);
#endif
return result;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"