commands/ash/memalloc.h

   1 /*-
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Kenneth Almquist.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 4. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)memalloc.h  8.2 (Berkeley) 5/4/95
  33  * $FreeBSD: src/bin/sh/memalloc.h,v 1.9 2004/04/06 20:06:51 markm Exp $
  34  */
  35
  36 struct stackmark {
  37         struct stack_block *stackp;
  38         char *stacknxt;
  39         int stacknleft;
  40         struct stackmark *marknext;
  41 };
  42
  43
  44 extern char *stacknxt;
  45 extern int stacknleft;
  46 extern int sstrnleft;
  47 extern int herefd;
  48
  49 pointer ckmalloc(int);
  50 pointer ckrealloc(pointer, int);
  51 char *savestr(const char *);
  52 pointer stalloc(int);
  53 void stunalloc(pointer);
  54 void setstackmark(struct stackmark *);
  55 void popstackmark(struct stackmark *);
  56 void growstackblock(void);
  57 void grabstackblock(int);
  58 char *growstackstr(void);
  59 char *makestrspace(void);
  60 void ungrabstackstr(char *, char *);
  61
  62
  63
  64 #define stackblock() stacknxt
  65 #define stackblocksize() stacknleft
  66 #define STARTSTACKSTR(p)        p = stackblock(), sstrnleft = stackblocksize()
  67 #define STPUTC(c, p)    (--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
  68 #define CHECKSTRSPACE(n, p)     { if (sstrnleft < n) p = makestrspace(); }
  69 #define USTPUTC(c, p)   (--sstrnleft, *p++ = (c))
  70 #define STACKSTRNUL(p)  (sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
  71 #define STUNPUTC(p)     (++sstrnleft, --p)
  72 #define STTOPC(p)       p[-1]
  73 #define STADJUST(amount, p)     (p += (amount), sstrnleft -= (amount))
  74 #define grabstackstr(p) stalloc(stackblocksize() - sstrnleft)
  75
  76 #define ckfree(p)       free((pointer)(p))
  77
  78 /*
  79  * $PchId: memalloc.h,v 1.3 2006/03/30 11:39:41 philip Exp $
  80  */