memalloc.h revision 127958 
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: head/bin/sh/memalloc.h 127958 2004-04-06 20:06:54Z markm $
34 */
35
36struct stackmark {
37	struct stack_block *stackp;
38	char *stacknxt;
39	int stacknleft;
40        struct stackmark *marknext;
41};
42
43
44extern char *stacknxt;
45extern int stacknleft;
46extern int sstrnleft;
47extern int herefd;
48
49pointer ckmalloc(int);
50pointer ckrealloc(pointer, int);
51char *savestr(char *);
52pointer stalloc(int);
53void stunalloc(pointer);
54void setstackmark(struct stackmark *);
55void popstackmark(struct stackmark *);
56void growstackblock(void);
57void grabstackblock(int);
58char *growstackstr(void);
59char *makestrspace(void);
60void 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