bin/sh/memalloc.h

   1 /*      $NetBSD: memalloc.h,v 1.15 2008/02/15 17:26:06 matt Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Kenneth Almquist.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)memalloc.h  8.2 (Berkeley) 5/4/95
  35  */
  36
  37 struct stackmark {
  38         struct stack_block *stackp;
  39         char *stacknxt;
  40         int stacknleft;
  41         struct stackmark *marknext;
  42 };
  43
  44
  45 extern char *stacknxt;
  46 extern int stacknleft;
  47 extern int sstrnleft;
  48 extern int herefd;
  49
  50 pointer ckmalloc(size_t);
  51 pointer ckrealloc(pointer, int);
  52 char *savestr(const char *);
  53 pointer stalloc(int);
  54 void stunalloc(pointer);
  55 void setstackmark(struct stackmark *);
  56 void popstackmark(struct stackmark *);
  57 void growstackblock(void);
  58 void grabstackblock(int);
  59 char *growstackstr(void);
  60 char *makestrspace(void);
  61 void ungrabstackstr(char *, char *);
  62
  63
  64
  65 #define stackblock() stacknxt
  66 #define stackblocksize() stacknleft
  67 #define STARTSTACKSTR(p)        p = stackblock(), sstrnleft = stackblocksize()
  68 #define STPUTC(c, p)    (--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
  69 #define CHECKSTRSPACE(n, p)     { if (sstrnleft < n) p = makestrspace(); }
  70 #define USTPUTC(c, p)   (--sstrnleft, *p++ = (c))
  71 #define STACKSTRNUL(p)  (sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
  72 #define STUNPUTC(p)     (++sstrnleft, --p)
  73 #define STTOPC(p)       p[-1]
  74 #define STADJUST(amount, p)     (p += (amount), sstrnleft -= (amount))
  75 #define grabstackstr(p) stalloc(stackblocksize() - sstrnleft)
  76
  77 #define ckfree(p)       free((pointer)(p))