1/* $OpenBSD: ed.h,v 1.22 2016/03/27 00:43:38 mmcc Exp $ */ 2/* $NetBSD: ed.h,v 1.23 1995/03/21 09:04:40 cgd Exp $ */ 3 4/* ed.h: type and constant definitions for the ed editor. */ 5/* 6 * Copyright (c) 1993 Andrew Moore 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)ed.h,v 1.5 1994/02/01 00:34:39 alm Exp 31 */ 32 33#include <limits.h> 34#include <regex.h> 35#include <signal.h> 36 37#define ERR (-2) 38#define EMOD (-3) 39#define FATAL (-4) 40 41#define MINBUFSZ 512 /* minimum buffer size - must be > 0 */ 42#define SE_MAX 30 /* max subexpressions in a regular expression */ 43#define LINECHARS INT_MAX /* max chars per line */ 44 45/* gflags */ 46#define GLB 001 /* global command */ 47#define GPR 002 /* print after command */ 48#define GLS 004 /* list after command */ 49#define GNP 010 /* enumerate after command */ 50#define GSG 020 /* global substitute */ 51 52/* Line node */ 53typedef struct line { 54 struct line *q_forw; 55 struct line *q_back; 56 off_t seek; /* address of line in scratch buffer */ 57 int len; /* length of line */ 58} line_t; 59 60 61typedef struct undo { 62 63/* type of undo nodes */ 64#define UADD 0 65#define UDEL 1 66#define UMOV 2 67#define VMOV 3 68 69 int type; /* command type */ 70 line_t *h; /* head of list */ 71 line_t *t; /* tail of list */ 72} undo_t; 73 74#ifndef max 75# define max(a,b) ((a) > (b) ? (a) : (b)) 76#endif 77#ifndef min 78# define min(a,b) ((a) < (b) ? (a) : (b)) 79#endif 80 81#define INC_MOD(l, k) ((l) + 1 > (k) ? 0 : (l) + 1) 82#define DEC_MOD(l, k) ((l) - 1 < 0 ? (k) : (l) - 1) 83 84/* SPL1: disable some interrupts (requires reliable signals) */ 85#define SPL1() mutex++ 86 87/* SPL0: enable all interrupts; check signal flags (requires reliable signals) */ 88#define SPL0() \ 89 do { \ 90 if (--mutex == 0) { \ 91 if (sighup) \ 92 handle_hup(SIGHUP); \ 93 if (sigint) \ 94 handle_int(SIGINT); \ 95 } \ 96 } while (0) 97 98/* STRTOI: convert a string to int */ 99#define STRTOI(i, p) { \ 100 long l = strtol(p, &p, 10); \ 101 if (l <= INT_MIN || l >= INT_MAX) { \ 102 seterrmsg("number out of range"); \ 103 i = 0; \ 104 return ERR; \ 105 } else \ 106 i = (int)l; \ 107} 108 109/* REALLOC: assure at least a minimum size for buffer b */ 110#define REALLOC(b,n,i,err) \ 111if ((i) > (n)) { \ 112 int ti = (n); \ 113 char *ts; \ 114 SPL1(); \ 115 if ((ts = realloc((b), ti += max((i), MINBUFSZ))) == NULL) { \ 116 perror(NULL); \ 117 seterrmsg("out of memory"); \ 118 SPL0(); \ 119 return err; \ 120 } \ 121 (n) = ti; \ 122 (b) = ts; \ 123 SPL0(); \ 124} 125 126/* REQUE: link pred before succ */ 127#define REQUE(pred, succ) (pred)->q_forw = (succ), (succ)->q_back = (pred) 128 129/* INSQUE: insert elem in circular queue after pred */ 130#define INSQUE(elem, pred) \ 131{ \ 132 REQUE((elem), (pred)->q_forw); \ 133 REQUE((pred), elem); \ 134} 135 136/* remque: remove_lines elem from circular queue */ 137#define REMQUE(elem) REQUE((elem)->q_back, (elem)->q_forw); 138 139/* NUL_TO_NEWLINE: overwrite ASCII NULs with newlines */ 140#define NUL_TO_NEWLINE(s, l) translit_text(s, l, '\0', '\n') 141 142/* NEWLINE_TO_NUL: overwrite newlines with ASCII NULs */ 143#define NEWLINE_TO_NUL(s, l) translit_text(s, l, '\n', '\0') 144 145/* Local Function Declarations */ 146void add_line_node(line_t *); 147int build_active_list(int); 148void clear_active_list(void); 149void clear_undo_stack(void); 150int close_sbuf(void); 151int delete_lines(int, int); 152int display_lines(int, int, int); 153int exec_command(void); 154int exec_global(int, int); 155int extract_addr_range(void); 156int extract_subst_tail(int *, int *); 157line_t *get_addressed_line_node(int); 158regex_t *get_compiled_pattern(void); 159char *get_extended_line(int *, int); 160int get_line_node_addr(line_t *); 161char *get_sbuf_line(line_t *); 162int get_tty_line(void); 163void handle_hup(int); 164void handle_int(int); 165int has_trailing_escape(char *, char *); 166void init_buffers(void); 167int open_sbuf(void); 168int pop_undo_stack(void); 169undo_t *push_undo_stack(int, int, int); 170char *put_sbuf_line(char *); 171int put_tty_line(char *, int, int, int); 172void quit(int); 173int read_file(char *, int); 174int search_and_replace(regex_t *, int, int); 175void seterrmsg(char *); 176char *strip_escapes(char *); 177char *translit_text(char *, int, int, int); 178void unmark_line_node(line_t *); 179void unset_active_nodes(line_t *, line_t *); 180int write_file(char *, char *, int, int); 181 182/* global buffers */ 183extern char *ibuf; 184extern char *ibufp; 185extern int ibufsz; 186 187/* global flags */ 188extern int isbinary; 189extern int isglobal; 190extern int modified; 191 192extern volatile sig_atomic_t mutex; 193extern volatile sig_atomic_t sighup; 194extern volatile sig_atomic_t sigint; 195 196/* global vars */ 197extern int addr_last; 198extern int current_addr; 199extern int first_addr; 200extern int lineno; 201extern int second_addr; 202