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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)memalloc.h 8.2 (Berkeley) 5/4/95 37 * $FreeBSD: src/bin/sh/memalloc.h,v 1.10 2005/10/28 10:45:19 stefanf Exp $ 38 * $DragonFly: src/bin/sh/memalloc.h,v 1.4 2007/01/14 03:59:57 pavalos Exp $ 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 void ckfree(pointer); 57 char *savestr(const char *); 58 pointer stalloc(int); 59 void stunalloc(pointer); 60 void setstackmark(struct stackmark *); 61 void popstackmark(struct stackmark *); 62 void growstackblock(void); 63 void grabstackblock(int); 64 char *growstackstr(void); 65 char *makestrspace(void); 66 void ungrabstackstr(char *, char *); 67 68 69 70 #define stackblock() stacknxt 71 #define stackblocksize() stacknleft 72 #define STARTSTACKSTR(p) p = stackblock(), sstrnleft = stackblocksize() 73 #define STPUTC(c, p) (--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c))) 74 #define CHECKSTRSPACE(n, p) { if (sstrnleft < n) p = makestrspace(); } 75 #define USTPUTC(c, p) (--sstrnleft, *p++ = (c)) 76 #define STACKSTRNUL(p) (sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0')) 77 #define STUNPUTC(p) (++sstrnleft, --p) 78 #define STTOPC(p) p[-1] 79 #define STADJUST(amount, p) (p += (amount), sstrnleft -= (amount)) 80 #define grabstackstr(p) stalloc(stackblocksize() - sstrnleft) 81