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authorUlrich Drepper <drepper@redhat.com>1999-06-23 12:38:51 +0000
committerUlrich Drepper <drepper@redhat.com>1999-06-23 12:38:51 +0000
commit67994d6f6010739c22b1b4ab99aa88b4fe1ab8bd (patch)
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Update.
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.
Diffstat (limited to 'manual/arith.texi')
-rw-r--r--manual/arith.texi22
1 files changed, 17 insertions, 5 deletions
diff --git a/manual/arith.texi b/manual/arith.texi
index a42267712d..7879a77b7c 100644
--- a/manual/arith.texi
+++ b/manual/arith.texi
@@ -2199,6 +2199,9 @@ index in the string of the first digit after the decimal point.
@var{neg} is set to a nonzero value if @var{value} is negative, zero
otherwise.
+If @var{ndigit} decimal digits would exceed the precision of a
+@code{double} it is reduced to a system-specific value.
+
The returned string is statically allocated and overwritten by each call
to @code{ecvt}.
@@ -2220,6 +2223,9 @@ left of the decimal point. For example, if @var{ndigit} is @code{-1},
negative and larger than the number of digits to the left of the decimal
point in @var{value}, @var{value} will be rounded to one significant digit.
+If @var{ndigit} decimal digits would exceed the precision of a
+@code{double} it is reduced to a system-specific value.
+
The returned string is statically allocated and overwritten by each call
to @code{fcvt}.
@end deftypefun
@@ -2230,6 +2236,9 @@ to @code{fcvt}.
@code{gcvt} is functionally equivalent to @samp{sprintf(buf, "%*g",
ndigit, value}. It is provided only for compatibility's sake. It
returns @var{buf}.
+
+If @var{ndigit} decimal digits would exceed the precision of a
+@code{double} it is reduced to a system-specific value.
@end deftypefun
As extensions, the GNU C library provides versions of these three
@@ -2238,22 +2247,25 @@ functions that take @code{long double} arguments.
@comment stdlib.h
@comment GNU
@deftypefun {char *} qecvt (long double @var{value}, int @var{ndigit}, int *@var{decpt}, int *@var{neg})
-This function is equivalent to @code{ecvt} except that it
-takes a @code{long double} for the first parameter.
+This function is equivalent to @code{ecvt} except that it takes a
+@code{long double} for the first parameter and that @var{ndigit} is
+restricted by the precision of a @code{long double}.
@end deftypefun
@comment stdlib.h
@comment GNU
@deftypefun {char *} qfcvt (long double @var{value}, int @var{ndigit}, int @var{decpt}, int *@var{neg})
This function is equivalent to @code{fcvt} except that it
-takes a @code{long double} for the first parameter.
+takes a @code{long double} for the first parameter and that @var{ndigit} is
+restricted by the precision of a @code{long double}.
@end deftypefun
@comment stdlib.h
@comment GNU
@deftypefun {char *} qgcvt (long double @var{value}, int @var{ndigit}, char *@var{buf})
-This function is equivalent to @code{gcvt} except that it
-takes a @code{long double} for the first parameter.
+This function is equivalent to @code{gcvt} except that it takes a
+@code{long double} for the first parameter and that @var{ndigit} is
+restricted by the precision of a @code{long double}.
@end deftypefun