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1999-06-23  Ulrich Drepper  <drepper@cygnus.com>

	* manual/arith.texi: Document restriction of ndigit parameter of
	ecvt and friends.
	* misc/efgcvt.c: Define NDIGIT_MAX.
	(gcvt): Limit precision in sprintf call to NDIGIT_MAX.
	Do not dynamically allocate the static buffers.  They are small enough.
	* misc/efgcvt_r.c: Define NDIGIT_MAX.
	(fcvt_r): Limit precision in snprintf call to NDIGIT_MAX.
	* misc/qefgcvt.c: Define NDIGIT_MAX.
	* misc/qefgcvt_r.c: Likewise.
	* misc/tst-efgcvt.c (special): Add test for large ndigit parameter.
This commit is contained in:
Ulrich Drepper
1999-06-23 12:38:51 +00:00
parent 7df789e059
commit 67994d6f60
7 changed files with 53 additions and 63 deletions
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14
misc/efgcvt_r.c
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@ -1,5 +1,5 @@
/* Compatibility functions for floating point formatting, reentrant versions.
Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
Copyright (C) 1995, 1996, 1997, 1998, 1999 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
@ -26,10 +26,11 @@
#include <sys/param.h>
#ifndef FLOAT_TYPE
#define FLOAT_TYPE double
#define FUNC_PREFIX
#define FLOAT_FMT_FLAG
#define FLOAT_NAME_EXT
# define FLOAT_TYPE double
# define FUNC_PREFIX
# define FLOAT_FMT_FLAG
# define FLOAT_NAME_EXT
# define NDIGIT_MAX DBL_DIG
#endif
#define APPEND(a, b) APPEND2 (a, b)
@ -87,7 +88,8 @@ APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign, buf, len)
/* Value is Inf or NaN. */
*sign = 0;
n = __snprintf (buf, len, "%.*" FLOAT_FMT_FLAG "f", ndigit, value);
n = __snprintf (buf, len, "%.*" FLOAT_FMT_FLAG "f", MIN (ndigit, NDIGIT_MAX),
value);
if (n < 0)
return -1;