1/*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1997-2005 5 * Herbert Xu <herbert@gondor.apana.org.au>. 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 * @(#)shell.h 8.2 (Berkeley) 5/4/95 35 */ 36 37/* 38 * The follow should be set to reflect the type of system you have: 39 * JOBS -> 1 if you have Berkeley job control, 0 otherwise. 40 * SHORTNAMES -> 1 if your linker cannot handle long names. 41 * define BSD if you are running 4.2 BSD or later. 42 * define SYSV if you are running under System V. 43 * define DEBUG=1 to compile in debugging ('set -o debug' to turn on) 44 * define DEBUG=2 to compile in and turn on debugging. 45 * define DO_SHAREDVFORK to indicate that vfork(2) shares its address 46 * with its parent. 47 * 48 * When debugging is on, debugging info will be written to ./trace and 49 * a quit signal will generate a core dump. 50 */ 51 52#include <zircon/compiler.h> 53#include <sys/param.h> 54 55#ifndef JOBS 56#define JOBS 1 57#endif 58#ifndef BSD 59#define BSD 1 60#endif 61 62#ifndef DO_SHAREDVFORK 63#if __NetBSD_Version__ >= 104000000 64#define DO_SHAREDVFORK 65#endif 66#endif 67 68typedef void *pointer; 69#ifndef NULL 70#define NULL (void *)0 71#endif 72#define STATIC static 73#define MKINIT /* empty */ 74 75extern char nullstr[1]; /* null string */ 76 77 78#ifdef DEBUG 79#define TRACE(param) trace param 80#define TRACEV(param) tracev param 81#else 82#define TRACE(param) 83#define TRACEV(param) 84#endif 85 86#if defined(__GNUC__) && __GNUC__ < 3 87#define va_copy __va_copy 88#endif 89 90#if !defined(__GNUC__) || (__GNUC__ == 2 && __GNUC_MINOR__ < 96) 91#define __builtin_expect(x, expected_value) (x) 92#endif 93 94#ifndef likely 95#define likely(x) __builtin_expect(!!(x),1) 96#endif 97 98#ifndef unlikely 99#define unlikely(x) __builtin_expect(!!(x),0) 100#endif 101 102/* 103 * Hack to calculate maximum length. 104 * (length * 8 - 1) * log10(2) + 1 + 1 + 12 105 * The second 1 is for the minus sign and the 12 is a safety margin. 106 */ 107static inline int max_int_length(int bytes) 108{ 109 return (bytes * 8 - 1) * 0.30102999566398119521 + 14; 110} 111