stdio/asprintf-fbsd.c

   1 /*      $OpenBSD: asprintf.c,v 1.8 2002/02/19 19:39:36 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/asprintf.c,v 1.13 2002/09/26 13:09:48 tjr Exp $");
  32
  33 #include "xlocale_private.h"
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <errno.h>
  38 #include <stdarg.h>
  39
  40 #include "local.h"
  41
  42 int
  43 asprintf(char **str, char const *fmt, ...)
  44 {
  45         int ret;
  46         va_list ap;
  47         FILE f;
  48         struct __sFILEX ext;
  49
  50         f._file = -1;
  51         f._flags = __SWR | __SSTR | __SALC;
  52         f._bf._base = f._p = (unsigned char *)malloc(128);
  53         if (f._bf._base == NULL) {
  54                 *str = NULL;
  55                 errno = ENOMEM;
  56                 return (-1);
  57         }
  58         f._bf._size = f._w = 127;               /* Leave room for the NUL */
  59         f._extra = &ext;
  60         INITEXTRA(&f);
  61         va_start(ap, fmt);
  62         ret = __vfprintf(&f, __current_locale(), fmt, ap);      /* Use unlocked __vfprintf */
  63         va_end(ap);
  64         if (ret < 0) {
  65                 free(f._bf._base);
  66                 *str = NULL;
  67                 errno = ENOMEM;
  68                 return (-1);
  69         }
  70         *f._p = '\0';
  71         *str = (char *)f._bf._base;
  72         return (ret);
  73 }
  74
  75 int
  76 asprintf_l(char **str, locale_t loc, char const *fmt, ...)
  77 {
  78         int ret;
  79         va_list ap;
  80         FILE f;
  81         struct __sFILEX ext;
  82
  83         NORMALIZE_LOCALE(loc);
  84         f._file = -1;
  85         f._flags = __SWR | __SSTR | __SALC;
  86         f._bf._base = f._p = (unsigned char *)malloc(128);
  87         if (f._bf._base == NULL) {
  88                 *str = NULL;
  89                 errno = ENOMEM;
  90                 return (-1);
  91         }
  92         f._bf._size = f._w = 127;               /* Leave room for the NUL */
  93         f._extra = &ext;
  94         INITEXTRA(&f);
  95         va_start(ap, fmt);
  96         ret = __vfprintf(&f, loc, fmt, ap);     /* Use unlocked __vfprintf */
  97         va_end(ap);
  98         if (ret < 0) {
  99                 free(f._bf._base);
 100                 *str = NULL;
 101                 errno = ENOMEM;
 102                 return (-1);
 103         }
 104         *f._p = '\0';
 105         *str = (char *)f._bf._base;
 106         return (ret);
 107 }