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memalloc.h revision 1.12 
      1 /*	$NetBSD: memalloc.h,v 1.12 2002/11/24 22:35:41 christos 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. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	@(#)memalloc.h	8.2 (Berkeley) 5/4/95
     39  */
     40 
     41 struct stackmark {
     42 	struct stack_block *stackp;
     43 	char *stacknxt;
     44 	int stacknleft;
     45 	struct stackmark *marknext;
     46 };
     47 
     48 
     49 extern char *stacknxt;
     50 extern int stacknleft;
     51 extern int sstrnleft;
     52 extern int herefd;
     53 
     54 pointer ckmalloc(int);
     55 pointer ckrealloc(pointer, int);
     56 char *savestr(char *);
     57 pointer stalloc(int);
     58 void stunalloc(pointer);
     59 void setstackmark(struct stackmark *);
     60 void popstackmark(struct stackmark *);
     61 void growstackblock(void);
     62 void grabstackblock(int);
     63 char *growstackstr(void);
     64 char *makestrspace(void);
     65 void ungrabstackstr(char *, char *);
     66 
     67 
     68 
     69 #define stackblock() stacknxt
     70 #define stackblocksize() stacknleft
     71 #define STARTSTACKSTR(p)	p = stackblock(), sstrnleft = stackblocksize()
     72 #define STPUTC(c, p)	(--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
     73 #define CHECKSTRSPACE(n, p)	{ if (sstrnleft < n) p = makestrspace(); }
     74 #define USTPUTC(c, p)	(--sstrnleft, *p++ = (c))
     75 #define STACKSTRNUL(p)	(sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
     76 #define STUNPUTC(p)	(++sstrnleft, --p)
     77 #define STTOPC(p)	p[-1]
     78 #define STADJUST(amount, p)	(p += (amount), sstrnleft -= (amount))
     79 #define grabstackstr(p)	stalloc(stackblocksize() - sstrnleft)
     80 
     81 #define ckfree(p)	free((pointer)(p))
     82