stdio/FreeBSD/vasprintf.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 __FBSDID("$FreeBSD: src/lib/libc/stdio/vasprintf.c,v 1.19 2008/04/17 22:17:54 jhb Exp $");
  32
  33 #include "xlocale_private.h"
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <errno.h>
  38 #include "local.h"
  39
  40 int
  41 vasprintf_l(str, loc, fmt, ap)
  42         char **str;
  43         locale_t loc;
  44         const char *fmt;
  45         __va_list ap;
  46 {
  47         int ret;
  48         FILE f;
  49         struct __sFILEX ext;
  50         f._extra = &ext;
  51         INITEXTRA(&f);
  52
  53         NORMALIZE_LOCALE(loc);
  54         f._file = -1;
  55         f._flags = __SWR | __SSTR | __SALC;
  56         f._bf._base = f._p = (unsigned char *)malloc(128);
  57         if (f._bf._base == NULL) {
  58                 *str = NULL;
  59                 errno = ENOMEM;
  60                 return (-1);
  61         }
  62         f._bf._size = f._w = 127;               /* Leave room for the NUL */
  63         f._orientation = 0;
  64         memset(&f._mbstate, 0, sizeof(mbstate_t));
  65         ret = __vfprintf(&f, loc, fmt, ap);
  66         if (ret < 0) {
  67                 free(f._bf._base);
  68                 *str = NULL;
  69                 errno = ENOMEM;
  70                 return (-1);
  71         }
  72         *f._p = '\0';
  73         *str = (char *)f._bf._base;
  74         return (ret);
  75 }
  76
  77 int
  78 vasprintf(str, fmt, ap)
  79         char **str;
  80         const char *fmt;
  81         __va_list ap;
  82 {
  83         return vasprintf_l(str, __current_locale(), fmt, ap);
  84 }