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