gnu/dist/groff/src/libs/libgroff/new.cpp

   1 /*      $NetBSD$        */
   2
   3 /* Copyright (C) 1989, 1990, 1991, 1992, 2001, 2003, 2004
   4    Free Software Foundation, Inc.
   5      Written by James Clark (jjc@jclark.com)
   6
   7 This file is part of groff.
   8
   9 groff is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 2, or (at your option) any later
  12 version.
  13
  14 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License along
  20 with groff; see the file COPYING.  If not, write to the Free Software
  21 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  22
  23 #include "lib.h"
  24
  25 #include <stddef.h>
  26 #include <stdlib.h>
  27
  28 #include "posix.h"
  29 #include "nonposix.h"
  30
  31 extern "C" const char *program_name;
  32
  33 static void ewrite(const char *s)
  34 {
  35   write(2, s, strlen(s));
  36 }
  37
  38 void *operator new(size_t size)
  39 {
  40   // Avoid relying on the behaviour of malloc(0).
  41   if (size == 0)
  42     size++;
  43 #ifdef COOKIE_BUG
  44   char *p = (char *)malloc(unsigned(size + 8));
  45 #else /* not COOKIE_BUG */
  46   char *p = (char *)malloc(unsigned(size));
  47 #endif /* not COOKIE_BUG */
  48   if (p == 0) {
  49     if (program_name) {
  50       ewrite(program_name);
  51       ewrite(": ");
  52     }
  53     ewrite("out of memory\n");
  54     _exit(-1);
  55   }
  56 #ifdef COOKIE_BUG
  57   ((unsigned *)p)[1] = 0;
  58   return p + 8;
  59 #else /* not COOKIE_BUG */
  60   return p;
  61 #endif /* not COOKIE_BUG */
  62 }
  63
  64 void operator delete(void *p)
  65 {
  66 #ifdef COOKIE_BUG
  67   if (p)
  68     free((void *)((char *)p - 8));
  69 #else
  70   if (p)
  71     free(p);
  72 #endif /* COOKIE_BUG */
  73 }