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1999-07-28  Ulrich Drepper  <drepper@cygnus.com>

	* misc/efgcvt.c: Use IEEE 854 formula to compute the number of digits
	to print.
	* misc/efgcvt_r.c: Likewise.
	* misc/qefgcvt.c: Likewise.
	* misc/qefgcvt_r.c: Likewise.
	* misc/tst-efgcvt.c: Remove one test which cannot reliably be run
	anymore.
This commit is contained in:
Ulrich Drepper 1999-07-28 22:39:04 +00:00
parent aa847ee5a4
commit b113c12c35
8 changed files with 43 additions and 9 deletions
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10
ChangeLog
View File

@ -1,3 +1,13 @@
1999-07-28 Ulrich Drepper <drepper@cygnus.com>
* misc/efgcvt.c: Use IEEE 854 formula to compute the number of digits
to print.
* misc/efgcvt_r.c: Likewise.
* misc/qefgcvt.c: Likewise.
* misc/qefgcvt_r.c: Likewise.
* misc/tst-efgcvt.c: Remove one test which cannot reliably be run
anymore.
1999-07-27 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* manual/math.texi (FP Function Optimization): Mention drawbacks.

10
misc/efgcvt.c
View File

@ -17,6 +17,7 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
@ -29,8 +30,13 @@
# define FLOAT_FMT_FLAG
/* Actually we have to write (DBL_DIG + log10 (DBL_MAX_10_EXP)) but we
don't have log10 available in the preprocessor. */
# define MAXDIG (DBL_DIG + 3)
# define NDIGIT_MAX DBL_DIG
# define MAXDIG (NDIGIT_MAX + 3)
# if DBL_MANT_DIG == 53
# define NDIGIT_MAX 17
# else
/* See IEEE 854 5.6, table 2 for this formula. */
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * DBL_MANT_DIG + 1.0)))
# endif
#endif
#define APPEND(a, b) APPEND2 (a, b)

7
misc/efgcvt_r.c
View File

@ -30,7 +30,12 @@
# define FUNC_PREFIX
# define FLOAT_FMT_FLAG
# define FLOAT_NAME_EXT
# define NDIGIT_MAX DBL_DIG
# if DBL_MANT_DIG == 53
# define NDIGIT_MAX 17
# else
/* See IEEE 854 5.6, table 2 for this formula. */
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * DBL_MANT_DIG + 1.0)))
# endif
#endif
#define APPEND(a, b) APPEND2 (a, b)

11
misc/qefgcvt.c
View File

@ -17,13 +17,20 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <float.h>
#define FLOAT_TYPE long double
#define FUNC_PREFIX q
#define FLOAT_FMT_FLAG "L"
/* Actually we have to write (LDBL_DIG + log10 (LDBL_MAX_10_EXP)) but
we don't have log10 available in the preprocessor. Since we cannot
assume anything on the used `long double' format be generous. */
#define MAXDIG (LDBL_DIG + 12)
#define NDIGIT_MAX LDBL_DIG
#define MAXDIG (NDIGIT_MAX + 12)
#if LDBL_MANT_DIG == 64
# define NDIGIT_MAX 21
#else
/* See IEEE 854 5.6, table 2 for this formula. */
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0)))
#endif
#include "efgcvt.c"

9
misc/qefgcvt_r.c
View File

@ -18,10 +18,17 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <float.h>
#define FLOAT_TYPE long double
#define FUNC_PREFIX q
#define FLOAT_FMT_FLAG "L"
#define FLOAT_NAME_EXT l
# define NDIGIT_MAX LDBL_DIG
#if LDBL_MANT_DIG == 64
# define NDIGIT_MAX 21
#else
/* See IEEE 854 5.6, table 2 for this formula. */
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0)))
#endif
#include "efgcvt_r.c"

1
misc/tst-efgcvt.c
View File

@ -56,7 +56,6 @@ static testcase ecvt_tests[] =
{ 123.01, -4, 3, "" },
{ 126.71, -4, 3, "" },
{ 0.0, 4, 1, "0000" },
{ 92.0, 16, 2, "920000000000000" },
/* -1.0 is end marker. */
{ -1.0, 0, 0, "" }
};

2
stdlib/mbtowc.c
View File

@ -48,7 +48,7 @@ mbtowc (wchar_t *pwc, const char *s, size_t n)
/* This is an extension in the Unix standard which does not directly
violate ISO C. */
memset (&__no_r_state, '\0', siyeof __no_r_state);
memset (&__no_r_state, '\0', sizeof __no_r_state);
result = __wcsmbs_gconv_fcts.towc->__stateful;
}

2
stdlib/wctomb.c
View File

@ -44,7 +44,7 @@ wctomb (char *s, wchar_t wchar)
/* This is an extension in the Unix standard which does not directly
violate ISO C. */
memset (&__no_r_state, '\0', siyeof __no_r_state);
memset (&__no_r_state, '\0', sizeof __no_r_state);
return __wcsmbs_gconv_fcts.tomb->__stateful;
}