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1 /* Like sprintf but provides a pointer to malloc'd storage, which must
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2 be freed by the caller.
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3 Copyright (C) 1997, 2003 Free Software Foundation, Inc.
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4 Contributed by Cygnus Solutions.
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5
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6 This file is part of the libiberty library.
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7 Libiberty is free software; you can redistribute it and/or
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8 modify it under the terms of the GNU Library General Public
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9 License as published by the Free Software Foundation; either
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10 version 2 of the License, or (at your option) any later version.
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11
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12 Libiberty is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 Library General Public License for more details.
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16
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17 You should have received a copy of the GNU Library General Public
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18 License along with libiberty; see the file COPYING.LIB. If
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19 not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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20 Boston, MA 02110-1301, USA. */
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21
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22 #ifdef HAVE_CONFIG_H
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23 #include "config.h"
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24 #endif
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25 #include "ansidecl.h"
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26 #include "libiberty.h"
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27
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28 #include <stdarg.h>
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29
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30 /*
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31
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32 @deftypefn Extension int asprintf (char **@var{resptr}, const char *@var{format}, ...)
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33
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34 Like @code{sprintf}, but instead of passing a pointer to a buffer, you
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35 pass a pointer to a pointer. This function will compute the size of
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36 the buffer needed, allocate memory with @code{malloc}, and store a
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37 pointer to the allocated memory in @code{*@var{resptr}}. The value
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38 returned is the same as @code{sprintf} would return. If memory could
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39 not be allocated, minus one is returned and @code{NULL} is stored in
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40 @code{*@var{resptr}}.
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41
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42 @end deftypefn
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43
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44 */
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45
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46 int
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47 asprintf (char **buf, const char *fmt, ...)
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48 {
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49 int status;
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50 VA_OPEN (ap, fmt);
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51 VA_FIXEDARG (ap, char **, buf);
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52 VA_FIXEDARG (ap, const char *, fmt);
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53 status = vasprintf (buf, fmt, ap);
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54 VA_CLOSE (ap);
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55 return status;
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56 }
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