Return to compat_reallocarray.c CVS log | Up to [cvsweb.bsd.lv] / mandoc |
File: [cvsweb.bsd.lv] / mandoc / compat_reallocarray.c (download)
Revision 1.3, Sat Aug 16 19:00:01 2014 UTC (10 years, 1 month ago) by schwarze
Improve build system and autodetection. * Make ./configure standalone, that's what people expect. * Let people write a ./configure.local from scratch, not edit existing files. * Autodetect wchar, sqlite3, and manpath and act accordingly. * Autodetect the need for -L/usr/local/lib and -lutil. * Get rid of config.h.p{re,ost}, let ./configure only write what's needed. * Let ./configure write a Makefile.local snippet, that's quite flexible. |
#include "config.h" #if HAVE_REALLOCARRAY int dummy; #else /* $OpenBSD: malloc.c,v 1.158 2014/04/23 15:07:27 tedu Exp $ */ /* * Copyright (c) 2008 Otto Moerbeek <otto@drijf.net> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <sys/types.h> #include <errno.h> #include <stdint.h> #include <stdlib.h> #define MUL_NO_OVERFLOW (1UL << (sizeof(size_t) * 4)) void * reallocarray(void *optr, size_t nmemb, size_t size) { if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) && nmemb > 0 && SIZE_MAX / nmemb < size) { errno = ENOMEM; return NULL; } return realloc(optr, size * nmemb); } #endif /*!HAVE_REALLOCARRAY*/