libiberty/xvasprintf.c

   1 /* Implement the xvasprintf function.
   2    Copyright (C) 2014-2018 Free Software Foundation, Inc.
   3    Contributed by Manuel Lopez-Ibanez.
   4
   5 This file is part of the libiberty library.
   6 Libiberty is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU Library General Public
   8 License as published by the Free Software Foundation; either
   9 version 2 of the License, or (at your option) any later version.
  10
  11 Libiberty is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 Library General Public License for more details.
  15
  16 You should have received a copy of the GNU Library General Public
  17 License along with libiberty; see the file COPYING.LIB.  If not, write
  18 to the Free Software Foundation, Inc., 51 Franklin Street - Fifth
  19 Floor, Boston, MA 02110-1301, USA.  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24 #include <ansidecl.h>
  25 #include <stdarg.h>
  26 #if !defined (va_copy) && defined (__va_copy)
  27 # define va_copy(d,s)  __va_copy((d),(s))
  28 #endif
  29 #include <stdio.h>
  30 #ifdef HAVE_STRING_H
  31 #include <string.h>
  32 #endif
  33 #include "libiberty.h"
  34 #include "vprintf-support.h"
  35
  36 /*
  37
  38 @deftypefn Replacement char* xvasprintf (const char *@var{format}, va_list @var{args})
  39
  40 Print to allocated string without fail.  If @code{xvasprintf} fails,
  41 this will print a message to @code{stderr} (using the name set by
  42 @code{xmalloc_set_program_name}, if any) and then call @code{xexit}.
  43
  44 @end deftypefn
  45
  46 */
  47
  48 char *
  49 xvasprintf (const char *format,
  50 #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__)
  51            _BSD_VA_LIST_ args)
  52 #else
  53            va_list args)
  54 #endif
  55 {
  56   char *result;
  57   int total_width = libiberty_vprintf_buffer_size (format, args);
  58   result = (char *) xmalloc (total_width);
  59   vsprintf (result, format, args);
  60   return result;
  61 }