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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)
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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.
-rw-r--r--ChangeLog14
-rw-r--r--manual/arith.texi26
-rw-r--r--manual/time.texi34
-rw-r--r--sysdeps/unix/sysv/linux/ifreq.h103
4 files changed, 159 insertions, 18 deletions
diff --git a/ChangeLog b/ChangeLog
index e3e61ea52f..9f56758318 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,17 @@
+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.
+
1999-10-29 Ulrich Drepper <drepper@cygnus.com>
* manual/math.texi (Errors in Math Functions): New section.
diff --git a/manual/arith.texi b/manual/arith.texi
index 1a24beb7ca..11479d618b 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 852df4355b..8d79a25ef1 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
diff --git a/sysdeps/unix/sysv/linux/ifreq.h b/sysdeps/unix/sysv/linux/ifreq.h
new file mode 100644
index 0000000000..8c9000551d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ifreq.h
@@ -0,0 +1,103 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+ Contributed by Andreas Jaeger <aj@suse.de>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include "kernel-features.h"
+
+/* Variable to signal whether SIOCGIFCONF is not available. */
+#if __ASSUME_SIOCGIFNAME == 0
+static int old_siocgifconf;
+#else
+# define old_siocgifconf 0
+#endif
+
+
+static inline void
+__ifreq (struct ifreq **ifreqs, int *num_ifs)
+{
+ int fd = __opensock ();
+ struct ifconf ifc;
+ int rq_len;
+ int nifs;
+# define RQ_IFS 4
+
+ if (fd < 0)
+ {
+ *num_ifs = 0;
+ *ifreqs = NULL;
+ return;
+ }
+
+ ifc.ifc_buf = NULL;
+
+ /* We may be able to get the needed buffer size directly, rather than
+ guessing. */
+ if (! old_siocgifconf)
+ {
+ ifc.ifc_buf = NULL;
+ ifc.ifc_len = 0;
+ if (__ioctl (fd, SIOCGIFCONF, &ifc) < 0 || ifc.ifc_len == 0)
+ {
+# if __ASSUME_SIOCGIFNAME == 0
+ old_siocgifconf = 1;
+# endif
+ rq_len = RQ_IFS * sizeof (struct ifreq);
+ }
+ else
+ rq_len = ifc.ifc_len;
+ }
+ else
+ rq_len = RQ_IFS * sizeof (struct ifreq);
+
+ /* Read all the interfaces out of the kernel. */
+ do
+ {
+ ifc.ifc_len = rq_len;
+ ifc.ifc_buf = realloc (ifc.ifc_buf, ifc.ifc_len);
+ if (ifc.ifc_buf == NULL || __ioctl (fd, SIOCGIFCONF, &ifc) < 0)
+ {
+ if (ifc.ifc_buf)
+ free (ifc.ifc_buf);
+
+ __close (fd);
+
+ *num_ifs = 0;
+ *ifreqs = NULL;
+ return;
+ }
+ rq_len *= 2;
+ }
+ while (ifc.ifc_len == rq_len && old_siocgifconf);
+
+ nifs = ifc.ifc_len / sizeof (struct ifreq);
+ __close (fd);
+
+ *num_ifs = nifs;
+ *ifreqs = realloc (ifc.ifc_buf, nifs * sizeof (struct ifreq));
+}
+
+static inline void
+__if_freereq (struct ifreq *ifreqs)
+{
+ free (ifreqs);
+}