xref: /netbsd/bin/ed/glbl.c (revision bbb81c22)
1 /*	$NetBSD: glbl.c,v 1.10 2019/01/04 19:13:58 maya Exp $	*/
2 
3 /* glob.c: This file contains the global command routines for the ed line
4    editor */
5 /*-
6  * Copyright (c) 1993 Andrew Moore, Talke Studio.
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 AUTHOR 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 AUTHOR 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 
31 #include <sys/cdefs.h>
32 #ifndef lint
33 #if 0
34 static char *rcsid = "@(#)glob.c,v 1.1 1994/02/01 00:34:40 alm Exp";
35 #else
36 __RCSID("$NetBSD: glbl.c,v 1.10 2019/01/04 19:13:58 maya Exp $");
37 #endif
38 #endif /* not lint */
39 
40 #include <sys/ioctl.h>
41 #include <sys/wait.h>
42 
43 #include "ed.h"
44 
45 
46 /* build_active_list:  add line matching a pattern to the global-active list */
47 int
build_active_list(int isgcmd)48 build_active_list(int isgcmd)
49 {
50 	pattern_t *pat;
51 	line_t *lp;
52 	long 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 */
80 long
exec_global(int interact,int gflag)81 exec_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 #ifdef BACKWARDS
91 	char cmdp[] = "p\n";
92 
93 	if (!interact) {
94 		if (!strcmp(ibufp, "\n"))
95 			cmd = cmdp;		/* null cmd-list == `p' */
96 		else if ((cmd = get_extended_line(&n, 0)) == NULL)
97 			return ERR;
98 	}
99 #else
100 	if (!interact && (cmd = get_extended_line(&n, 0)) == NULL)
101 		return ERR;
102 #endif
103 	clear_undo_stack();
104 	while ((lp = next_active_node()) != NULL) {
105 		if ((current_addr = get_line_node_addr(lp)) < 0)
106 			return ERR;
107 		if (interact) {
108 			/* print current_addr; get a command in global syntax */
109 			if (display_lines(current_addr, current_addr, gflag) < 0)
110 				return ERR;
111 			while ((n = get_tty_line()) > 0 &&
112 			    ibuf[n - 1] != '\n')
113 				clearerr(stdin);
114 			if (n < 0)
115 				return ERR;
116 			else if (n == 0) {
117 				seterrmsg("unexpected end-of-file");
118 				return ERR;
119 			} else if (n == 1 && !strcmp(ibuf, "\n"))
120 				continue;
121 			else if (n == 2 && !strcmp(ibuf, "&\n")) {
122 				if (cmd == NULL) {
123 					seterrmsg("no previous command");
124 					return ERR;
125 				} else cmd = ocmd;
126 			} else if ((cmd = get_extended_line(&n, 0)) == NULL)
127 				return ERR;
128 			else {
129 				REALLOC(ocmd, ocmdsz, n + 1, ERR);
130 				memcpy(ocmd, cmd, n + 1);
131 				cmd = ocmd;
132 			}
133 
134 		}
135 		ibufp = cmd;
136 		for (; *ibufp;)
137 			if ((status = extract_addr_range()) < 0 ||
138 			    (status = exec_command()) < 0 ||
139 			    (status > 0 && (status = display_lines(
140 			    current_addr, current_addr, status)) < 0))
141 				return status;
142 	}
143 	return 0;
144 }
145 
146 
147 line_t **active_list;		/* list of lines active in a global command */
148 long active_last;		/* index of last active line in active_list */
149 long active_size;		/* size of active_list */
150 long active_ptr;		/* active_list index (non-decreasing) */
151 long active_ndx;		/* active_list index (modulo active_last) */
152 
153 /* set_active_node: add a line node to the global-active list */
154 int
set_active_node(line_t * lp)155 set_active_node(line_t *lp)
156 {
157 	if (active_last + 1 > active_size) {
158 		int ti = active_size;
159 		line_t **ts;
160 		SPL1();
161 		if ((ts = (line_t **) realloc(active_list,
162 		    (ti += MINBUFSZ) * sizeof(line_t **))) == NULL) {
163 			fprintf(stderr, "%s\n", strerror(errno));
164 			seterrmsg("out of memory");
165 			SPL0();
166 			return ERR;
167 		}
168 		active_size = ti;
169 		active_list = ts;
170 		SPL0();
171 	}
172 	active_list[active_last++] = lp;
173 	return 0;
174 }
175 
176 
177 /* unset_active_nodes: remove a range of lines from the global-active list */
178 void
unset_active_nodes(line_t * np,line_t * mp)179 unset_active_nodes(line_t *np, line_t *mp)
180 {
181 	line_t *lp;
182 	long i;
183 
184 	for (lp = np; lp != mp; lp = lp->q_forw)
185 		for (i = 0; i < active_last; i++)
186 			if (active_list[active_ndx] == lp) {
187 				active_list[active_ndx] = NULL;
188 				active_ndx = INC_MOD(active_ndx, active_last - 1);
189 				break;
190 			} else	active_ndx = INC_MOD(active_ndx, active_last - 1);
191 }
192 
193 
194 /* next_active_node: return the next global-active line node */
195 line_t *
next_active_node(void)196 next_active_node(void)
197 {
198 	while (active_ptr < active_last && active_list[active_ptr] == NULL)
199 		active_ptr++;
200 	return (active_ptr < active_last) ? active_list[active_ptr++] : NULL;
201 }
202 
203 
204 /* clear_active_list: clear the global-active list */
205 void
clear_active_list(void)206 clear_active_list(void)
207 {
208 	SPL1();
209 	active_size = active_last = active_ptr = active_ndx = 0;
210 	free(active_list);
211 	active_list = NULL;
212 	SPL0();
213 }
214