2 We need a fully open libc (no libc_i18n)

Reviewd by: garrett@nexenta.com
Approved by: garrett@nexenta.com

1 files changed, 138 insertions, 0 deletions

diff --git a/usr/src/lib/libc/port/locale/wcsftime.c b/usr/src/lib/libc/port/locale/wcsftime.c
new file mode 100644
index 0000000000..80afc62a7a
--- /dev/null
+++ b/usr/src/lib/libc/port/locale/wcsftime.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2002 Tim J. Robbins
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/*
+ * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include "lint.h"
+#include "mse_int.h"
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <wchar.h>
+#include <alloca.h>
+
+/*
+ * Convert date and time to a wide-character string.
+ *
+ * This is the wide-character counterpart of strftime(). So that we do not
+ * have to duplicate the code of strftime(), we convert the format string to
+ * multibyte, call strftime(), then convert the result back into wide
+ * characters.
+ *
+ * This technique loses in the presence of stateful multibyte encoding if any
+ * of the conversions in the format string change conversion state. When
+ * stateful encoding is implemented, we will need to reset the state between
+ * format specifications in the format string.
+ *
+ * Note carefully that prior to xpg5, the format was char *, not wchar_t.
+ */
+
+/*
+ * Hmmm this is probably a bit backwards.  As we are converting to single
+ * byte formats, perhaps we should not be doing a redundant conversion.
+ * Something to look at for the future.
+ */
+
+size_t
+__wcsftime_xpg5(wchar_t *wcs, size_t maxsize, const wchar_t *format,
+    const struct tm *timeptr)
+{
+	static const mbstate_t initial = { 0 };
+	mbstate_t mbs;
+	char *dst, *sformat;
+	const char *dstp;
+	const wchar_t *formatp;
+	size_t n, sflen;
+	int sverrno;
+
+	sformat = dst = NULL;
+
+	/*
+	 * Convert the supplied format string to a multibyte representation
+	 * for strftime(), which only handles single-byte characters.
+	 */
+	mbs = initial;
+	formatp = format;
+	sflen = wcsrtombs(NULL, &formatp, 0, &mbs);
+	if (sflen == (size_t)-1)
+		goto error;
+	if ((sformat = malloc(sflen + 1)) == NULL)
+		goto error;
+	mbs = initial;
+	(void) wcsrtombs(sformat, &formatp, sflen + 1, &mbs);
+
+	/*
+	 * Allocate memory for longest multibyte sequence that will fit
+	 * into the caller's buffer and call strftime() to fill it.
+	 * Then, copy and convert the result back into wide characters in
+	 * the caller's buffer.
+	 */
+	if (LONG_MAX / MB_CUR_MAX <= maxsize) {
+		/* maxsize is prepostorously large - avoid int. overflow. */
+		errno = EINVAL;
+		goto error;
+	}
+	if ((dst = malloc(maxsize * MB_CUR_MAX)) == NULL)
+		goto error;
+	if (strftime(dst, maxsize, sformat, timeptr) == 0)
+		goto error;
+	dstp = dst;
+	mbs = initial;
+	n = mbsrtowcs(wcs, &dstp, maxsize, &mbs);
+	if (n == (size_t)-2 || n == (size_t)-1 || dstp != NULL)
+		goto error;
+
+	free(sformat);
+	free(dst);
+	return (n);
+
+error:
+	sverrno = errno;
+	free(sformat);
+	free(dst);
+	errno = sverrno;
+	return (0);
+}
+
+size_t
+wcsftime(wchar_t *wcs, size_t maxsize, const char *format,
+    const struct tm *timeptr)
+{
+	int	len;
+	wchar_t	*wfmt;
+
+	/* Convert the format (mb string) to wide char array */
+	len = strlen(format) + 1;
+	wfmt = alloca(sizeof (wchar_t) * len);
+	if (mbstowcs(wfmt, format, len) == (size_t)-1) {
+		return (0);
+	}
+	return (__wcsftime_xpg5(wcs, maxsize, wfmt, timeptr));
+}