1 /* Like sprintf but provides a pointer to malloc'd storage, which must 2 be freed by the caller. 3 Copyright (C) 1997 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., 59 Temple Place - Suite 330, 20 Boston, MA 02111-1307, USA. */ 21 22 #include "ansidecl.h" 23 #include "libiberty.h" 24 25 #ifdef ANSI_PROTOTYPES 26 #include <stdarg.h> 27 #else 28 #include <varargs.h> 29 #endif 30 31 /* 32 33 @deftypefn Extension int asprintf (char **@var{resptr}, const char *@var{format}, ...) 34 35 Like @code{sprintf}, but instead of passing a pointer to a buffer, you 36 pass a pointer to a pointer. This function will compute the size of 37 the buffer needed, allocate memory with @code{malloc}, and store a 38 pointer to the allocated memory in @code{*@var{resptr}}. The value 39 returned is the same as @code{sprintf} would return. If memory could 40 not be allocated, zero is returned and @code{NULL} is stored in 41 @code{*@var{resptr}}. 42 43 @end deftypefn 44 45 */ 46 47 int 48 asprintf VPARAMS ((char **buf, const char *fmt, ...)) 49 { 50 int status; 51 VA_OPEN (ap, fmt); 52 VA_FIXEDARG (ap, char **, buf); 53 VA_FIXEDARG (ap, const char *, fmt); 54 status = vasprintf (buf, fmt, ap); 55 VA_CLOSE (ap); 56 return status; 57 } 58