1 /* 2 * Copyright (c) 1997 Todd C. Miller <Todd.Miller (at) courtesan.com> 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 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
