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authorJim Meyering <jim@meyering.net>2005-08-02 20:47:37 +0000
committerJim Meyering <jim@meyering.net>2005-08-02 20:47:37 +0000
commit8822b68f9e475918afc1fb797031ba2b34fef24c (patch)
tree58bd5da71935c6abbc555c971ce6b0119f1fcc52 /lib
parente568ad3e457cc49e09719ca74ac11b939f56dbc3 (diff)
downloadcoreutils-8822b68f9e475918afc1fb797031ba2b34fef24c.tar.xz
new files
Diffstat (limited to 'lib')
-rw-r--r--lib/xanstrftime.c69
-rw-r--r--lib/xanstrftime.h22
2 files changed, 91 insertions, 0 deletions
diff --git a/lib/xanstrftime.c b/lib/xanstrftime.c
new file mode 100644
index 000000000..59f2dfdc8
--- /dev/null
+++ b/lib/xanstrftime.c
@@ -0,0 +1,69 @@
+/* xanstrftime.c -- format date/time into xmalloc'd storage
+ Copyright (C) 2005 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+/* Written by Jim Meyering. */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include "xanstrftime.h"
+
+#include "strftime.h"
+#include "xalloc.h"
+
+/* Return true if the nstrftime expansion of FORMAT (given DATE_TIME, etc.)
+ is the empty string (this happens with %p in many locales).
+ Otherwise, return false. */
+static bool
+degenerate_format (char const *format, struct tm const *date_time,
+ int ut, int ns)
+{
+ size_t format_len = strlen (format);
+ char *fake_fmt = xmalloc (format_len + 2);
+ bool degenerate;
+ char buf[2];
+
+ /* Create a copy of FORMAT with a space prepended. */
+ fake_fmt[0] = ' ';
+ memcpy (&fake_fmt[1], format, format_len + 1);
+
+ degenerate = nstrftime (buf, sizeof buf, fake_fmt, date_time, ut, ns) == 1;
+ free (fake_fmt);
+
+ return degenerate;
+}
+
+/* Like nstrftime, but take no buffer or length parameters and
+ instead return the formatted result in malloc'd storage.
+ Call xalloc_die upon allocation failure. */
+char *
+xanstrftime (char const *format, struct tm const *date_time, int ut, int ns)
+{
+ bool first = true;
+ char *buf = NULL;
+ size_t buf_length = 0;
+
+ while (true)
+ {
+ buf = X2REALLOC (buf, &buf_length);
+ if (nstrftime (buf, buf_length, format, date_time, ut, ns)
+ || (first && degenerate_format (format, date_time, ut, ns)))
+ return buf;
+ first = false;
+ }
+}
diff --git a/lib/xanstrftime.h b/lib/xanstrftime.h
new file mode 100644
index 000000000..d904ff403
--- /dev/null
+++ b/lib/xanstrftime.h
@@ -0,0 +1,22 @@
+/* declarations for xanstrftime.c
+
+ Copyright (C) 2005 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include <time.h>
+
+char *
+xanstrftime (char const *format, struct tm const *date_time, int ut, int ns);