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5a4e47bd30
vasprintf.c: Likewise. (vasprintf): Return -1 upon error. functions.texi: Document changes to asprintf and vasprintf.
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/* Like sprintf but provides a pointer to malloc'd storage, which must
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be freed by the caller.
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Copyright (C) 1997, 2003 Free Software Foundation, Inc.
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Contributed by Cygnus Solutions.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "ansidecl.h"
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#include "libiberty.h"
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#ifdef ANSI_PROTOTYPES
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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/*
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@deftypefn Extension int asprintf (char **@var{resptr}, const char *@var{format}, ...)
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Like @code{sprintf}, but instead of passing a pointer to a buffer, you
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pass a pointer to a pointer. This function will compute the size of
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the buffer needed, allocate memory with @code{malloc}, and store a
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pointer to the allocated memory in @code{*@var{resptr}}. The value
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returned is the same as @code{sprintf} would return. If memory could
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not be allocated, minus one is returned and @code{NULL} is stored in
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@code{*@var{resptr}}.
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@end deftypefn
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*/
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int
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asprintf VPARAMS ((char **buf, const char *fmt, ...))
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{
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int status;
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VA_OPEN (ap, fmt);
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VA_FIXEDARG (ap, char **, buf);
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VA_FIXEDARG (ap, const char *, fmt);
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status = vasprintf (buf, fmt, ap);
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VA_CLOSE (ap);
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return status;
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}
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