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Fix formatting of denormal IBM long double numbers

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This commit is contained in:
Andreas Schwab
2012-04-03 18:38:46 +02:00
parent 6d5c57fabd
commit 7e0d315da8
5 changed files with 115 additions and 16 deletions
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2
stdio-common/Makefile
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@@ -56,7 +56,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
tst-fwrite bug16 bug17 tst-swscanf tst-sprintf2 bug18 bug18a \
bug19 bug19a tst-popen2 scanf13 scanf14 scanf15 bug20 bug21 bug22 \
scanf16 scanf17 tst-setvbuf1 tst-grouping bug23 bug24 \
bug-vfprintf-nargs tst-long-dbl-fphex tst-fphex-wide
bug-vfprintf-nargs tst-long-dbl-fphex tst-fphex-wide tst-sprintf3
test-srcs = tst-unbputc tst-printf

90
stdio-common/tst-sprintf3.c Normal file
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@@ -0,0 +1,90 @@
/* Copyright (C) 2012 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
<http://www.gnu.org/licenses/>. */
/* Test bug #13941. */
#include <float.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
int
main (void)
{
#if LDBL_MANT_DIG >= 106
volatile union { long double l; long long x[2]; } u, v;
char buf[64];
#endif
int result = 0;
#if LDBL_MANT_DIG == 106 || LDBL_MANT_DIG == 113
# define COMPARE_LDBL(u, v) \
((u).l == (v).l && (u).x[0] == (v).x[0] && (u).x[1] == (v).x[1])
#else
# define COMPARE_LDBL(u, v) ((u).l == (v).l)
#endif
#define TEST(val) \
do \
{ \
u.l = (val); \
snprintf (buf, sizeof buf, "%.30LgL", u.l); \
if (strcmp (buf, #val) != 0) \
{ \
printf ("Error on line %d: %s != %s\n", __LINE__, buf, #val); \
result = 1; \
} \
if (sscanf (#val, "%Lg", &v.l) != 1 || !COMPARE_LDBL (u, v)) \
{ \
printf ("Error sscanf on line %d: %.30Lg != %.30Lg\n", __LINE__, \
u.l, v.l); \
result = 1; \
} \
/* printf ("%s %Lg %016Lx %016Lx\n", #val, u.l, u.x[0], u.x[1]); */ \
} \
while (0)
#if LDBL_MANT_DIG >= 106
# if LDBL_MANT_DIG == 106
TEST (2.22507385850719347803989925739e-308L);
TEST (2.22507385850719397210554509863e-308L);
TEST (2.22507385850720088902458687609e-308L);
# endif
TEST (2.22507385850720138309023271733e-308L);
TEST (2.22507385850720187715587855858e-308L);
TEST (2.2250738585074419930597574044e-308L);
TEST (4.45014771701440227211481959342e-308L);
TEST (4.45014771701440276618046543466e-308L);
TEST (4.45014771701440375431175711716e-308L);
TEST (4.45014771701440474244304879965e-308L);
TEST (7.12023634722304600689881138745e-307L);
TEST (1.13923781555569064960474854133e-305L);
TEST (1.13777777777777776389998996996L);
TEST (1.13777777777777765287768750745L);
TEST (20988295479420645138.2044444444L);
TEST (20988295479420643090.2044444444L);
TEST (2.14668699894294423266045294316e-292L);
# if LDBL_MANT_DIG == 106
TEST (-2.35993711055432139266626434123e-292L);
TEST (6.26323524637968345414769634658e-302L);
TEST (1.49327164802066885331814201989e-308L);
TEST (3.71834550652787023640837473722e-308L);
TEST (9.51896449671134907001349268087e-306L);
# endif
#endif
return result;
}