stdio/vswprintf-fbsd.c

   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  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  19  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  20  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
  21  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  24  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  25  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  27  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 #if 0
  32 __FBSDID("FreeBSD: src/lib/libc/stdio/vasprintf.c,v 1.16 2002/08/21 16:19:57 mike Exp ");
  33 #endif
  34 __FBSDID("$FreeBSD: src/lib/libc/stdio/vswprintf.c,v 1.5 2004/04/07 09:55:05 tjr Exp $");
  35
  36 #include "xlocale_private.h"
  37
  38 #include <errno.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <wchar.h>
  42 #include "local.h"
  43
  44 int
  45 vswprintf(wchar_t * __restrict s, size_t n, const wchar_t * __restrict fmt,
  46     __va_list ap)
  47 {
  48         static const mbstate_t initial;
  49         mbstate_t mbs;
  50         FILE f;
  51         struct __sFILEX ext;
  52         char *mbp;
  53         int ret, sverrno;
  54         size_t conv;
  55         locale_t loc = __current_locale();
  56
  57         if (n == 0) {
  58                 errno = EINVAL;
  59                 return (-1);
  60         }
  61
  62         f._file = -1;
  63         f._flags = __SWR | __SSTR | __SALC;
  64         f._bf._base = f._p = (unsigned char *)malloc(128);
  65         if (f._bf._base == NULL) {
  66                 errno = ENOMEM;
  67                 return (-1);
  68         }
  69         f._bf._size = f._w = 127;               /* Leave room for the NUL */
  70         f._extra = &ext;
  71         INITEXTRA(&f);
  72         ret = __vfwprintf(&f, loc, 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 = (char *)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         if ((conv = mbsrtowcs_l(s, (const char **)&mbp, n, &mbs, loc)) == (size_t)-1) {
  87                 free(f._bf._base);
  88                 errno = EILSEQ;
  89                 return (-1);
  90         }
  91         free(f._bf._base);
  92         if (conv >= n) {
  93                 s[n - 1] = L'\0';
  94                 errno = EOVERFLOW;
  95                 return (-1);
  96         }
  97
  98         return (ret);
  99 }
 100
 101 int
 102 vswprintf_l(wchar_t * __restrict s, size_t n, locale_t loc,
 103     const wchar_t * __restrict fmt, __va_list ap)
 104 {
 105         static const mbstate_t initial;
 106         mbstate_t mbs;
 107         FILE f;
 108         struct __sFILEX ext;
 109         char *mbp;
 110         int ret, sverrno;
 111         size_t conv;
 112
 113         NORMALIZE_LOCALE(loc);
 114         if (n == 0) {
 115                 errno = EINVAL;
 116                 return (-1);
 117         }
 118
 119         f._file = -1;
 120         f._flags = __SWR | __SSTR | __SALC;
 121         f._bf._base = f._p = (unsigned char *)malloc(128);
 122         if (f._bf._base == NULL) {
 123                 errno = ENOMEM;
 124                 return (-1);
 125         }
 126         f._bf._size = f._w = 127;               /* Leave room for the NUL */
 127         f._extra = &ext;
 128         INITEXTRA(&f);
 129         ret = __vfwprintf(&f, loc, fmt, ap);
 130         if (ret < 0) {
 131                 sverrno = errno;
 132                 free(f._bf._base);
 133                 errno = sverrno;
 134                 return (-1);
 135         }
 136         *f._p = '\0';
 137         mbp = (char *)f._bf._base;
 138         /*
 139          * XXX Undo the conversion from wide characters to multibyte that
 140          * fputwc() did in __vfwprintf().
 141          */
 142         mbs = initial;
 143         if ((conv = mbsrtowcs_l(s, (const char **)&mbp, n, &mbs, loc)) == (size_t)-1) {
 144                 free(f._bf._base);
 145                 errno = EILSEQ;
 146                 return (-1);
 147         }
 148         free(f._bf._base);
 149         if (conv >= n) {
 150                 s[n - 1] = L'\0';
 151                 errno = EOVERFLOW;
 152                 return (-1);
 153         }
 154
 155         return (ret);
 156 }