Add fwprintf, swprintf, vfwprintf, vswprintf, vwprintf, and wprintf to libc.

Based on our vfprintf etc. implementations. Wide character parts based on
NetBSD but with lots of macros expanded. Minor bump for libc.
ok kettenis espie

1 files changed, 97 insertions, 0 deletions

diff --git a/lib/libc/stdio/vswprintf.c b/lib/libc/stdio/vswprintf.c
new file mode 100644
index 00000000000..4d10976edd4
--- /dev/null
+++ b/lib/libc/stdio/vswprintf.c
@@ -0,0 +1,97 @@
+/*	$OpenBSD: vswprintf.c,v 1.1 2011/04/24 07:46:58 stsp Exp $	*/
+/*	$NetBSD: vswprintf.c,v 1.1 2005/05/14 23:51:02 christos Exp $	*/
+
+/*
+ * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``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 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.
+ */
+
+#include <sys/cdefs.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <stdarg.h>
+#include "local.h"
+
+int
+vswprintf(wchar_t * __restrict s, size_t n, const wchar_t * __restrict fmt,
+    __va_list ap)
+{
+	mbstate_t mbs;
+	FILE f;
+	char *mbp;
+	int ret, sverrno;
+	size_t nwc;
+	struct __sfileext fext;
+
+	if (n == 0) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	_FILEEXT_SETUP(&f, &fext);
+	f._file = -1;
+	f._flags = __SWR | __SSTR | __SALC;
+	f._bf._base = f._p = (unsigned char *)malloc(128);
+	if (f._bf._base == NULL) {
+		errno = ENOMEM;
+		return (-1);
+	}
+	f._bf._size = f._w = 127;		/* Leave room for the NUL */
+	ret = __vfwprintf(&f, fmt, ap);
+	if (ret < 0) {
+		sverrno = errno;
+		free(f._bf._base);
+		errno = sverrno;
+		return (-1);
+	}
+	if (ret == 0) {
+		s[0] = L'\0';
+		free(f._bf._base);
+		return (0);
+	}
+	*f._p = '\0';
+	mbp = (char *)f._bf._base;
+	/*
+	 * XXX Undo the conversion from wide characters to multibyte that
+	 * fputwc() did in __vfwprintf().
+	 */
+	bzero(&mbs, sizeof(mbs));
+	nwc = mbsrtowcs(s, (const char **)&mbp, n, &mbs);
+	free(f._bf._base);
+	if (nwc == (size_t)-1) {
+		errno = EILSEQ;
+		return (-1);
+	}
+	if (nwc == n) {
+		s[n - 1] = L'\0';
+		errno = EOVERFLOW;
+		return (-1);
+	}
+
+	return (ret);
+}