xref: /minix3/bin/sh/memalloc.h (revision d90bee97498b3043241050f61aed100786c59df4)
1*d90bee97SLionel Sambuc /*	$NetBSD: memalloc.h,v 1.15 2008/02/15 17:26:06 matt Exp $	*/
2*d90bee97SLionel Sambuc 
3*d90bee97SLionel Sambuc /*-
4*d90bee97SLionel Sambuc  * Copyright (c) 1991, 1993
5*d90bee97SLionel Sambuc  *	The Regents of the University of California.  All rights reserved.
6*d90bee97SLionel Sambuc  *
7*d90bee97SLionel Sambuc  * This code is derived from software contributed to Berkeley by
8*d90bee97SLionel Sambuc  * Kenneth Almquist.
9*d90bee97SLionel Sambuc  *
10*d90bee97SLionel Sambuc  * Redistribution and use in source and binary forms, with or without
11*d90bee97SLionel Sambuc  * modification, are permitted provided that the following conditions
12*d90bee97SLionel Sambuc  * are met:
13*d90bee97SLionel Sambuc  * 1. Redistributions of source code must retain the above copyright
14*d90bee97SLionel Sambuc  *    notice, this list of conditions and the following disclaimer.
15*d90bee97SLionel Sambuc  * 2. Redistributions in binary form must reproduce the above copyright
16*d90bee97SLionel Sambuc  *    notice, this list of conditions and the following disclaimer in the
17*d90bee97SLionel Sambuc  *    documentation and/or other materials provided with the distribution.
18*d90bee97SLionel Sambuc  * 3. Neither the name of the University nor the names of its contributors
19*d90bee97SLionel Sambuc  *    may be used to endorse or promote products derived from this software
20*d90bee97SLionel Sambuc  *    without specific prior written permission.
21*d90bee97SLionel Sambuc  *
22*d90bee97SLionel Sambuc  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23*d90bee97SLionel Sambuc  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24*d90bee97SLionel Sambuc  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25*d90bee97SLionel Sambuc  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26*d90bee97SLionel Sambuc  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27*d90bee97SLionel Sambuc  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28*d90bee97SLionel Sambuc  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29*d90bee97SLionel Sambuc  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30*d90bee97SLionel Sambuc  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31*d90bee97SLionel Sambuc  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32*d90bee97SLionel Sambuc  * SUCH DAMAGE.
33*d90bee97SLionel Sambuc  *
34*d90bee97SLionel Sambuc  *	@(#)memalloc.h	8.2 (Berkeley) 5/4/95
35*d90bee97SLionel Sambuc  */
36*d90bee97SLionel Sambuc 
37*d90bee97SLionel Sambuc struct stackmark {
38*d90bee97SLionel Sambuc 	struct stack_block *stackp;
39*d90bee97SLionel Sambuc 	char *stacknxt;
40*d90bee97SLionel Sambuc 	int stacknleft;
41*d90bee97SLionel Sambuc 	struct stackmark *marknext;
42*d90bee97SLionel Sambuc };
43*d90bee97SLionel Sambuc 
44*d90bee97SLionel Sambuc 
45*d90bee97SLionel Sambuc extern char *stacknxt;
46*d90bee97SLionel Sambuc extern int stacknleft;
47*d90bee97SLionel Sambuc extern int sstrnleft;
48*d90bee97SLionel Sambuc extern int herefd;
49*d90bee97SLionel Sambuc 
50*d90bee97SLionel Sambuc pointer ckmalloc(size_t);
51*d90bee97SLionel Sambuc pointer ckrealloc(pointer, int);
52*d90bee97SLionel Sambuc char *savestr(const char *);
53*d90bee97SLionel Sambuc pointer stalloc(int);
54*d90bee97SLionel Sambuc void stunalloc(pointer);
55*d90bee97SLionel Sambuc void setstackmark(struct stackmark *);
56*d90bee97SLionel Sambuc void popstackmark(struct stackmark *);
57*d90bee97SLionel Sambuc void growstackblock(void);
58*d90bee97SLionel Sambuc void grabstackblock(int);
59*d90bee97SLionel Sambuc char *growstackstr(void);
60*d90bee97SLionel Sambuc char *makestrspace(void);
61*d90bee97SLionel Sambuc void ungrabstackstr(char *, char *);
62*d90bee97SLionel Sambuc 
63*d90bee97SLionel Sambuc 
64*d90bee97SLionel Sambuc 
65*d90bee97SLionel Sambuc #define stackblock() stacknxt
66*d90bee97SLionel Sambuc #define stackblocksize() stacknleft
67*d90bee97SLionel Sambuc #define STARTSTACKSTR(p)	p = stackblock(), sstrnleft = stackblocksize()
68*d90bee97SLionel Sambuc #define STPUTC(c, p)	(--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
69*d90bee97SLionel Sambuc #define CHECKSTRSPACE(n, p)	{ if (sstrnleft < n) p = makestrspace(); }
70*d90bee97SLionel Sambuc #define USTPUTC(c, p)	(--sstrnleft, *p++ = (c))
71*d90bee97SLionel Sambuc #define STACKSTRNUL(p)	(sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
72*d90bee97SLionel Sambuc #define STUNPUTC(p)	(++sstrnleft, --p)
73*d90bee97SLionel Sambuc #define STTOPC(p)	p[-1]
74*d90bee97SLionel Sambuc #define STADJUST(amount, p)	(p += (amount), sstrnleft -= (amount))
75*d90bee97SLionel Sambuc #define grabstackstr(p)	stalloc(stackblocksize() - sstrnleft)
76*d90bee97SLionel Sambuc 
77*d90bee97SLionel Sambuc #define ckfree(p)	free((pointer)(p))
78