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authorUlrich Drepper <drepper@redhat.com>1999-10-30 16:13:07 +0000
committerUlrich Drepper <drepper@redhat.com>1999-10-30 16:13:07 +0000
commit0c34b1e9b5f8cf667dd287be2c25cd2e1a2cff7c (patch)
treeafe1088133a5a9b2fcd02aab6579a150abc7b484 /manual
parentaaa1276ee31ca872190cd097c7b4d845996fed39 (diff)
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Update.
1999-10-30 Ulrich Drepper <drepper@cygnus.com> * manual/time.texi (Formatting Date and Time): Revise comments about origins of the formats with ISO C99 references. 1999-10-30 Andreas Jaeger <aj@suse.de> * sysdeps/unix/sysv/linux/ifreq.h: New file. 1999-10-29 Andreas Jaeger <aj@suse.de> * manual/arith.texi (Parsing of Floats): Document the hexadecimal input format; mention that strtof and strtold are part of ISO C99.
Diffstat (limited to 'manual')
-rw-r--r--manual/arith.texi26
-rw-r--r--manual/time.texi34
2 files changed, 42 insertions, 18 deletions
diff --git a/manual/arith.texi b/manual/arith.texi
index 1a24beb..11479d6 100644
--- a/manual/arith.texi
+++ b/manual/arith.texi
@@ -2101,6 +2101,10 @@ are whitespace is determined by the @code{isspace} function
@item
An optional plus or minus sign (@samp{+} or @samp{-}).
+@item A floating point number in decimal or hexadecimal format. The
+decimal format is:
+@itemize @minus
+
@item
A nonempty sequence of digits optionally containing a decimal-point
character---normally @samp{.}, but it depends on the locale
@@ -2110,6 +2114,22 @@ character---normally @samp{.}, but it depends on the locale
An optional exponent part, consisting of a character @samp{e} or
@samp{E}, an optional sign, and a sequence of digits.
+@end itemize
+
+The hexadecimal format is as follows:
+@itemize @minus
+
+@item
+A 0x or 0X followed by a nonempty sequence of hexadecimal digits
+optionally containing a decimal-point character---normally @samp{.}, but
+it depends on the locale (@pxref{General Numeric}).
+
+@item
+An optional binary-exponent part, consisting of a character @samp{p} or
+@samp{P}, an optional sign, and a sequence of digits.
+
+@end itemize
+
@item
Any remaining characters in the string. If @var{tailptr} is not a null
pointer, a pointer to this tail of the string is stored in
@@ -2146,10 +2166,10 @@ examining @var{errno} and @var{tailptr}.
@end deftypefun
@comment stdlib.h
-@comment GNU
+@comment ISO C
@deftypefun float strtof (const char *@var{string}, char **@var{tailptr})
@comment stdlib.h
-@comment GNU
+@comment ISO C
@deftypefunx {long double} strtold (const char *@var{string}, char **@var{tailptr})
These functions are analogous to @code{strtod}, but return @code{float}
and @code{long double} values respectively. They report errors in the
@@ -2158,7 +2178,7 @@ than @code{strtod}, but has less precision; conversely, @code{strtold}
can be much slower but has more precision (on systems where @code{long
double} is a separate type).
-These functions are GNU extensions.
+These functions have been GNU extensions and are new to @w{ISO C 9x}.
@end deftypefun
@comment stdlib.h
diff --git a/manual/time.texi b/manual/time.texi
index 852df43..8d79a25 100644
--- a/manual/time.texi
+++ b/manual/time.texi
@@ -781,7 +781,7 @@ The preferred date and time representation for the current locale.
The century of the year. This is equivalent to the greatest integer not
greater than the year divided by 100.
-This format is a POSIX.2 extension.
+This format is a POSIX.2 extension and also appears in @w{ISO C99}.
@item %d
The day of the month as a decimal number (range @code{01} through @code{31}).
@@ -789,19 +789,19 @@ The day of the month as a decimal number (range @code{01} through @code{31}).
@item %D
The date using the format @code{%m/%d/%y}.
-This format is a POSIX.2 extension.
+This format is a POSIX.2 extension and also appears in @w{ISO C99}.
@item %e
The day of the month like with @code{%d}, but padded with blank (range
@code{ 1} through @code{31}).
-This format is a POSIX.2 extension.
+This format is a POSIX.2 extension and also appears in @w{ISO C99}.
@item %F
The date using the format @code{%Y-%m-%d}. This is the form specified
in the @w{ISO 8601} standard and is the preferred form for all uses.
-This format is a @w{ISO C 9X} extension.
+This format is a @w{ISO C99} extension.
@item %g
The year corresponding to the ISO week number, but without the century
@@ -809,7 +809,7 @@ The year corresponding to the ISO week number, but without the century
as @code{%y}, except that if the ISO week number (see @code{%V}) belongs
to the previous or next year, that year is used instead.
-This format is a GNU extension.
+This format was introduced in @w{ISO C99}.
@item %G
The year corresponding to the ISO week number. This has the same format
@@ -817,13 +817,14 @@ and value as @code{%Y}, except that if the ISO week number (see
@code{%V}) belongs to the previous or next year, that year is used
instead.
-This format is a GNU extension.
+This format was introduced in @w{ISO C99} but was previously available
+as a GNU extension.
@item %h
The abbreviated month name according to the current locale. The action
is the same as for @code{%b}.
-This format is a POSIX.2 extension.
+This format is a POSIX.2 extension and also appears in @w{ISO C99}.
@item %H
The hour as a decimal number, using a 24-hour clock (range @code{00} through
@@ -857,7 +858,7 @@ The minute as a decimal number (range @code{00} through @code{59}).
@item %n
A single @samp{\n} (newline) character.
-This format is a POSIX.2 extension.
+This format is a POSIX.2 extension and also appears in @w{ISO C99}.
@item %p
Either @samp{AM} or @samp{PM}, according to the given time value; or the
@@ -873,17 +874,19 @@ Either @samp{am} or @samp{pm}, according to the given time value; or the
corresponding strings for the current locale, printed in lowercase
characters. Noon is treated as @samp{pm} and midnight as @samp{am}.
-This format is a GNU extension.
+This format was introduced in @w{ISO C99} but was previously available
+as a GNU extension.
@item %r
The complete time using the AM/PM format of the current locale.
-This format is a POSIX.2 extension.
+This format is a POSIX.2 extension and also appears in @w{ISO C99}.
@item %R
The hour and minute in decimal numbers using the format @code{%H:%M}.
-This format is a GNU extension.
+This format was introduced in @w{ISO C99} but was previously available
+as a GNU extension.
@item %s
The number of seconds since the epoch, i.e., since 1970-01-01 00:00:00 UTC.
@@ -897,7 +900,7 @@ The seconds as a decimal number (range @code{00} through @code{60}).
@item %t
A single @samp{\t} (tabulator) character.
-This format is a POSIX.2 extension.
+This format is a POSIX.2 extension and also appears in @w{ISO C99}.
@item %T
The time using decimal numbers using the format @code{%H:%M:%S}.
@@ -908,7 +911,7 @@ This format is a POSIX.2 extension.
The day of the week as a decimal number (range @code{1} through
@code{7}), Monday being @code{1}.
-This format is a POSIX.2 extension.
+This format is a POSIX.2 extension and also appears in @w{ISO C99}.
@item %U
The week number of the current year as a decimal number (range @code{00}
@@ -927,7 +930,7 @@ The week before week @code{01} of a year is the last week (@code{52} or
@code{53}) of the previous year even if it contains days from the new
year.
-This format is a POSIX.2 extension.
+This format is a POSIX.2 extension and also appears in @w{ISO C99}.
@item %w
The day of the week as a decimal number (range @code{0} through
@@ -959,7 +962,8 @@ before the year @code{1} are numbered @code{0}, @code{-1}, and so on.
@code{-0600} or @code{+0100}), or nothing if no time zone is
determinable.
-This format is a GNU extension.
+This format was introduced in @w{ISO C99} but was previously available
+as a GNU extension.
A full @w{RFC 822} timestamp is generated by the format
@w{@samp{"%a, %d %b %Y %H:%M:%S %z"}} (or the equivalent