1 /* 2 * Copyright (c) 1988 Mark Nudleman 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. 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 * @(#)less.h 8.1 (Berkeley) 6/6/93 35 * 36 * $FreeBSD: src/usr.bin/more/less.h,v 1.7 2000/05/14 03:30:58 hoek Exp $ 37 */ 38 39 #define MAXVARLENGTH (20) 40 41 #define NULL_POSITION ((off_t)(-1)) 42 43 #define EOI (0) 44 #define READ_INTR (-2) 45 46 /* Special chars used to tell put_line() to do something special */ 47 #define UL_CHAR '\201' /* Enter underline mode */ 48 #define UE_CHAR '\202' /* Exit underline mode */ 49 #define BO_CHAR '\203' /* Enter boldface mode */ 50 #define BE_CHAR '\204' /* Exit boldface mode */ 51 52 #define CONTROL_CHAR(c) (!isprint(c)) 53 #define CARAT_CHAR(c) ((c == '\177') ? '?' : (c | 0100)) 54 55 #define TOP (0) 56 #define TOP_PLUS_ONE (1) 57 #define BOTTOM (-1) 58 #define BOTTOM_PLUS_ONE (-2) 59 #define MIDDLE (-3) 60 61 /* The return type of runmacro() */ 62 enum runmacro { OK=0, TOOMACRO, BADMACRO, NOMACRO, BADCOMMAND }; 63 64 #define NOFLAGS 0 65 #define FORCE_OPEN 0 /* edit() flag */ 66 #define NO_FORCE_OPEN 1 /* edit() flag */ 67 68 #ifdef DEFINEGLOBALS 69 #define GLOBAL(var, val) var = val 70 #else 71 #define GLOBAL(var, val) extern var 72 #endif 73 74 /* 75 * This style of error-reporting (see also command.c) is only used by some 76 * code. Eventually most of the code should use it, since it is becoming 77 * inconvenient to have John Q. random function() calling error(). 78 * 79 * This style of error-reporting still leaves somewhat to be desired.... 80 * 81 * Note that more(1) needs to potentially work under low-memory conditions 82 * (such as may occur when all available memory has been sucked-up by 83 * the file buffer in ch.c). 84 */ 85 86 /* Be careful about ordering correctly!! (must match deferrinit_) */ 87 enum error { E_OK=0, E_AMBIG, E_BADMATH, E_BADVAR, E_BOGCOM, E_CANTPARSE, 88 E_CANTXPND, E_COMPLIM, E_EXTERN, E_NOMAC, E_MALLOC, E_NONUM, 89 E_NOSTR, E_NOTOG, E_SYSTEM, E_NULL }; 90 91 /* Listed here for reference only. Be careful about ordering correctly!! */ 92 #define deferrinit_ { \ 93 "", /* E_OK */ \ 94 "ambigious macro", /* E_AMBIG */ \ 95 "invalid arithmetic expression", /* E_BADMATH */ \ 96 "bad variable", /* E_BADVAR */ \ 97 "bogus command", /* E_BOGCOM */ \ 98 "could not parse command string", /* E_CANTPARSE */ \ 99 "could not expand macro", /* E_CANTXPND */ \ 100 "compile time limit", /* E_COMPLIM */ \ 101 "external dependency error", /* E_EXTERN */ \ 102 "could not find match for macro", /* E_NOMAC */ \ 103 "malloc() failed", /* E_MALLOC */ \ 104 "missing numeric argument to command", /* E_NONUM */ \ 105 "missing string argument to command", /* E_NOSTR */ \ 106 "bad n-toggle argument to command", /* E_NOTOG */ \ 107 "system error", /* E_SYSTEM */ \ 108 "to the unknown error", /* E_NULL */ \ 109 } 110 GLOBAL(const char *deferr[], deferrinit_ ); 111 112 /* 113 * It is possible for erreur to become unsynchronized from errstr if 114 * its users aren't careful. Access through the macros is considered 115 * careful. 116 */ 117 GLOBAL(enum error erreur, E_OK); 118 GLOBAL(char *errstr, NULL); /* must point be null or free()'ble */ 119 120 #define SETERR(e) do { \ 121 erreur = (e); \ 122 if (errstr) free(errstr); \ 123 errstr = NULL; \ 124 } while (0) 125 /* SETERRSTR() also exists. It is in command.c */ 126 127 /* 128 * An emalloc() traditionally never fails, but fmalloc() may fail, hence 129 * the non-standard name. The fmalloc() is just syntactic sugar that sets 130 * erreur for the user. 131 * 132 * fmalloc(size, pointer-to-new-memory); 133 * 134 * Don't compile this puppy with -Wall or she'll squeel loud! 135 */ 136 137 #define FMALLOC(s,v) ((((v) = malloc(s)) ? 0 : \ 138 ((errstr ? free(errstr), errstr=NULL : 0), erreur = E_MALLOC)), (v)) 139