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Add replacement function for asprintf

I don't know of any GNU/Linux system that would not have
asprintf(3), but just in case, let's provide a replacement
function for it.
develop
Damien Goutte-Gattat 7 years ago
parent
commit
453231d7fa
  1. 61
      lib/asprintf.c
  2. 2
      m4/notch.m4

61
lib/asprintf.c

@ -0,0 +1,61 @@
/*
* asprintf - Incenp.org Notch Library: (v)asprintf replacement
* Copyright (C) 2011 Damien Goutte-Gattat
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
int
vasprintf(char **strp, const char *fmt, va_list ap)
{
int n;
va_list aq;
if ( ! strp ) {
errno = EINVAL;
return -1;
}
n = vsnprintf(NULL, 0, fmt, ap) + 1;
if ( ! (*strp = malloc(n)) )
return -1;
va_copy(ap, aq);
n = vsnprintf(*strp, n, fmt, aq);
va_end(aq);
return n;
}
int
asprintf(char **strp, const char *fmt, ...)
{
int n;
va_list ap;
va_start(ap, fmt);
n = vasprintf(strp, fmt, ap);
va_end(ap);
return n;
}

2
m4/notch.m4

@ -4,7 +4,7 @@ dnl everywhere, and for which we provide a replacement.
dnl
AC_DEFUN([ICP_CHECK_NOTCH_FUNCS],[
AC_CHECK_HEADERS([err.h], [], [AC_CONFIG_LINKS([err.h:lib/err.compat.h])])
AC_REPLACE_FUNCS([err])
AC_REPLACE_FUNCS([err asprintf])
AC_CHECK_DECLS([program_invocation_short_name], [],
[AC_CHECK_FUNCS([getprogname setprogname], [],
[AC_LIBOBJ([progname])])],

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