1 /* $OpenBSD: vasprintf.c,v 1.4 1998/06/21 22:13:47 millert Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> 5 * All rights reserved. 6 * 7 * Copyright (c) 2011 The FreeBSD Foundation 8 * All rights reserved. 9 * Portions of this software were developed by David Chisnall 10 * under sponsorship from the FreeBSD Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 24 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 25 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 26 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #if 0 37 __FBSDID("FreeBSD: src/lib/libc/stdio/vasprintf.c,v 1.16 2002/08/21 16:19:57 mike Exp "); 38 #endif 39 __FBSDID("$FreeBSD$"); 40 41 #include <errno.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <wchar.h> 45 #include "local.h" 46 #include "xlocale_private.h" 47 48 int 49 vswprintf_l(wchar_t * __restrict s, size_t n, locale_t locale, 50 const wchar_t * __restrict fmt, __va_list ap) 51 { 52 static const mbstate_t initial; 53 mbstate_t mbs; 54 FILE f = FAKE_FILE; 55 char *mbp; 56 int ret, sverrno; 57 size_t nwc; 58 FIX_LOCALE(locale); 59 60 if (n == 0) { 61 errno = EINVAL; 62 return (-1); 63 } 64 65 f._flags = __SWR | __SSTR | __SALC; 66 f._bf._base = f._p = (unsigned char *)malloc(128); 67 if (f._bf._base == NULL) { 68 errno = ENOMEM; 69 return (-1); 70 } 71 f._bf._size = f._w = 127; /* Leave room for the NUL */ 72 ret = __vfwprintf(&f, locale, fmt, ap); 73 if (ret < 0) { 74 sverrno = errno; 75 free(f._bf._base); 76 errno = sverrno; 77 return (-1); 78 } 79 *f._p = '\0'; 80 mbp = f._bf._base; 81 /* 82 * XXX Undo the conversion from wide characters to multibyte that 83 * fputwc() did in __vfwprintf(). 84 */ 85 mbs = initial; 86 nwc = mbsrtowcs_l(s, (const char **)&mbp, n, &mbs, locale); 87 free(f._bf._base); 88 if (nwc == (size_t)-1) { 89 errno = EILSEQ; 90 return (-1); 91 } 92 if (nwc == n) { 93 s[n - 1] = L'\0'; 94 errno = EOVERFLOW; 95 return (-1); 96 } 97 98 return (ret); 99 } 100 int 101 vswprintf(wchar_t * __restrict s, size_t n, const wchar_t * __restrict fmt, 102 __va_list ap) 103 { 104 return vswprintf_l(s, n, __get_locale(), fmt, ap); 105 } 106