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memalloc.h revision 1.16.2.1 
      1 /*	$NetBSD: memalloc.h,v 1.16.2.1 2017/07/23 14:58:14 snj 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 	int sstrnleft;
     42 	struct stackmark *marknext;
     43 };
     44 
     45 
     46 extern char *stacknxt;
     47 extern int stacknleft;
     48 extern int sstrnleft;
     49 extern int herefd;
     50 
     51 pointer ckmalloc(size_t);
     52 pointer ckrealloc(pointer, int);
     53 char *savestr(const char *);
     54 pointer stalloc(int);
     55 void stunalloc(pointer);
     56 void setstackmark(struct stackmark *);
     57 void popstackmark(struct stackmark *);
     58 void growstackblock(void);
     59 void grabstackblock(int);
     60 char *growstackstr(void);
     61 char *makestrspace(void);
     62 void ungrabstackstr(char *, char *);
     63 
     64 
     65 
     66 #define stackblock() stacknxt
     67 #define stackblocksize() stacknleft
     68 #define STARTSTACKSTR(p)	p = stackblock(), sstrnleft = stackblocksize()
     69 #define STPUTC(c, p)	(--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
     70 #define CHECKSTRSPACE(n, p)	{ if (sstrnleft < n) p = makestrspace(); }
     71 #define USTPUTC(c, p)	(--sstrnleft, *p++ = (c))
     72 #define STACKSTRNUL(p)	(sstrnleft == 0? (p = growstackstr(), sstrnleft++, *p = '\0') : (*p = '\0'))
     73 #define STUNPUTC(p)	(++sstrnleft, --p)
     74 #define STTOPC(p)	p[-1]
     75 #define STADJUST(amount, p)	(p += (amount), sstrnleft -= (amount))
     76 #define grabstackstr(p)	stalloc((p) - stackblock())
     77 
     78 #define ckfree(p)	free((pointer)(p))
     79