1 /*
2 * Copyright (c) 1997 Todd C. Miller <[email protected]>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27 FreeBSD: src/lib/libc/stdio/vswprintf.c,v 1.6 2005/02/21 19:41:44 fjoe Exp
28 NetBSD: vswprintf.c,v 1.1 2005/05/14 23:51:02 christos Exp
29 */
30 #include <LibConfig.h>
31 #include <sys/EfiCdefs.h>
32
33 #include <errno.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <wchar.h>
37 #include <stdarg.h>
38 #include "reentrant.h"
39 #include "local.h"
40
41 int
vswprintf(wchar_t * __restrict s,size_t n,const wchar_t * __restrict fmt,va_list ap)42 vswprintf(wchar_t * __restrict s, size_t n, const wchar_t * __restrict fmt,
43 va_list ap)
44 {
45 static const mbstate_t initial = { 0 };
46 mbstate_t mbs;
47 FILE f;
48 char *mbp;
49 int ret, sverrno;
50 size_t nwc;
51 struct __sfileext fext;
52
53 if (n == 0) {
54 errno = EINVAL;
55 return (-1);
56 }
57
58 _FILEEXT_SETUP(&f, &fext);
59 f._file = -1;
60 f._flags = __SWR | __SSTR | __SALC;
61 f._bf._base = f._p = (unsigned char *)malloc(128);
62 if (f._bf._base == NULL) {
63 errno = ENOMEM;
64 return (-1);
65 }
66 f._bf._size = f._w = 127; /* Leave room for the NUL */
67 ret = __vfwprintf_unlocked(&f, fmt, ap);
68 if (ret < 0) {
69 sverrno = errno;
70 free(f._bf._base);
71 errno = sverrno;
72 return (-1);
73 }
74 *f._p = '\0';
75 mbp = (char *)f._bf._base;
76 /*
77 * XXX Undo the conversion from wide characters to multibyte that
78 * fputwc() did in __vfwprintf().
79 */
80 mbs = initial;
81 nwc = mbsrtowcs(s, (const char **)&mbp, n, &mbs);
82 free(f._bf._base);
83 if (nwc == (size_t)-1) {
84 errno = EILSEQ;
85 return (-1);
86 }
87 if (nwc == n) {
88 s[n - 1] = L'\0';
89 errno = EOVERFLOW;
90 return (-1);
91 }
92
93 return (ret);
94 }
95