1/* $OpenBSD: glbl.c,v 1.20 2018/06/04 13:26:21 martijn Exp $ */ 2/* $NetBSD: glbl.c,v 1.2 1995/03/21 09:04:41 cgd Exp $ */ 3 4/* glob.c: This file contains the global command routines for the ed line 5 editor */ 6/*- 7 * Copyright (c) 1993 Andrew Moore, Talke Studio. 8 * All rights reserved. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/ioctl.h> 33#include <sys/wait.h> 34 35#include <regex.h> 36#include <signal.h> 37#include <stdio.h> 38#include <stdlib.h> 39#include <string.h> 40 41#include "ed.h" 42 43static int set_active_node(line_t *); 44static line_t *next_active_node(void); 45 46/* build_active_list: add line matching a pattern to the global-active list */ 47int 48build_active_list(int isgcmd) 49{ 50 regex_t *pat; 51 line_t *lp; 52 int n; 53 char *s; 54 char delimiter; 55 56 if ((delimiter = *ibufp) == ' ' || delimiter == '\n') { 57 seterrmsg("invalid pattern delimiter"); 58 return ERR; 59 } else if ((pat = get_compiled_pattern()) == NULL) 60 return ERR; 61 else if (*ibufp == delimiter) 62 ibufp++; 63 clear_active_list(); 64 lp = get_addressed_line_node(first_addr); 65 for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) { 66 if ((s = get_sbuf_line(lp)) == NULL) 67 return ERR; 68 if (isbinary) 69 NUL_TO_NEWLINE(s, lp->len); 70 if ((!regexec(pat, s, 0, NULL, 0)) == isgcmd && 71 set_active_node(lp) < 0) 72 return ERR; 73 } 74 return 0; 75} 76 77 78/* exec_global: apply command list in the command buffer to the active 79 lines in a range; return command status */ 80int 81exec_global(int interact, int gflag) 82{ 83 static char *ocmd = NULL; 84 static int ocmdsz = 0; 85 86 line_t *lp = NULL; 87 int status; 88 int n; 89 char *cmd = NULL; 90 91 if (!interact) { 92 if (!strcmp(ibufp, "\n")) 93 cmd = "p\n"; /* null cmd-list == `p' */ 94 else if ((cmd = get_extended_line(&n, 0)) == NULL) 95 return ERR; 96 } 97 clear_undo_stack(); 98 while ((lp = next_active_node()) != NULL) { 99 if ((current_addr = get_line_node_addr(lp)) < 0) 100 return ERR; 101 if (interact) { 102 /* print current_addr; get a command in global syntax */ 103 if (display_lines(current_addr, current_addr, gflag) < 0) 104 return ERR; 105 while ((n = get_tty_line()) > 0 && 106 ibuf[n - 1] != '\n') 107 clearerr(stdin); 108 if (n < 0) 109 return ERR; 110 else if (n == 0) { 111 seterrmsg("unexpected end-of-file"); 112 return ERR; 113 } else if (n == 1 && !strcmp(ibuf, "\n")) 114 continue; 115 else if (n == 2 && !strcmp(ibuf, "&\n")) { 116 if (cmd == NULL) { 117 seterrmsg("no previous command"); 118 return ERR; 119 } else cmd = ocmd; 120 } else if ((cmd = get_extended_line(&n, 0)) == NULL) 121 return ERR; 122 else { 123 REALLOC(ocmd, ocmdsz, n + 1, ERR); 124 memcpy(ocmd, cmd, n + 1); 125 cmd = ocmd; 126 } 127 128 } 129 ibufp = cmd; 130 for (; *ibufp;) 131 if ((status = extract_addr_range()) < 0 || 132 (status = exec_command()) < 0 || 133 (status > 0 && (status = display_lines( 134 current_addr, current_addr, status)) < 0)) 135 return status; 136 } 137 return 0; 138} 139 140 141static line_t **active_list; /* list of lines active in a global command */ 142static int active_last; /* index of last active line in active_list */ 143static int active_size; /* size of active_list */ 144static int active_ptr; /* active_list index (non-decreasing) */ 145static int active_ndx; /* active_list index (modulo active_last) */ 146 147/* set_active_node: add a line node to the global-active list */ 148static int 149set_active_node(line_t *lp) 150{ 151 if (active_last + 1 > active_size) { 152 int ti = active_size; 153 line_t **ts; 154 SPL1(); 155 if ((ts = reallocarray(active_list, 156 (ti += MINBUFSZ), sizeof(line_t **))) == NULL) { 157 perror(NULL); 158 seterrmsg("out of memory"); 159 SPL0(); 160 return ERR; 161 } 162 active_size = ti; 163 active_list = ts; 164 SPL0(); 165 } 166 active_list[active_last++] = lp; 167 return 0; 168} 169 170 171/* unset_active_nodes: remove a range of lines from the global-active list */ 172void 173unset_active_nodes(line_t *np, line_t *mp) 174{ 175 line_t *lp; 176 int i; 177 178 for (lp = np; lp != mp; lp = lp->q_forw) 179 for (i = 0; i < active_last; i++) 180 if (active_list[active_ndx] == lp) { 181 active_list[active_ndx] = NULL; 182 active_ndx = INC_MOD(active_ndx, active_last - 1); 183 break; 184 } else active_ndx = INC_MOD(active_ndx, active_last - 1); 185} 186 187 188/* next_active_node: return the next global-active line node */ 189static line_t * 190next_active_node(void) 191{ 192 while (active_ptr < active_last && active_list[active_ptr] == NULL) 193 active_ptr++; 194 return (active_ptr < active_last) ? active_list[active_ptr++] : NULL; 195} 196 197 198/* clear_active_list: clear the global-active list */ 199void 200clear_active_list(void) 201{ 202 SPL1(); 203 active_size = active_last = active_ptr = active_ndx = 0; 204 free(active_list); 205 active_list = NULL; 206 SPL0(); 207} 208