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Test errno setting on strtod overflow in tst-strtod-round

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We have no tests that errno is set to ERANGE on overflow of
strtod-family functions (we do have some tests for underflow, in
tst-strtod-underflow).  Add such tests to tst-strtod-round.

Tested for x86_64.
This commit is contained in:
Joseph Myers 2024-08-14 17:15:46 +00:00
parent 3f54e459a6
commit 207d64feb2
1 changed files with 11 additions and 0 deletions
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11
stdlib/tst-strtod-round-skeleton.c
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@ -21,6 +21,7 @@
declared in the headers. */
#define _LIBC_TEST 1
#define __STDC_WANT_IEC_60559_TYPES_EXT__
#include <errno.h>
#include <fenv.h>
#include <float.h>
#include <math.h>
@ -205,7 +206,9 @@ struct test {
#define GEN_ONE_TEST(FSUF, FTYPE, FTOSTR, LSUF, CSUF) \
{ \
feclearexcept (FE_ALL_EXCEPT); \
errno = 0; \
FTYPE f = STRTO (FSUF) (s, NULL); \
int new_errno = errno; \
if (f != expected->FSUF \
|| (copysign ## CSUF) (1.0 ## LSUF, f) \
!= (copysign ## CSUF) (1.0 ## LSUF, expected->FSUF)) \
@ -254,6 +257,14 @@ struct test {
printf ("ignoring this exception error\n"); \
} \
} \
if (overflow->FSUF && new_errno != ERANGE) \
{ \
printf (FNPFXS "to" #FSUF \
" (" STRM ") left errno == %d," \
" not %d (ERANGE)\n", \
s, new_errno, ERANGE); \
result = 1; \
} \
} \
}