xref: /freebsd/bin/ed/glbl.c (revision 42249ef2)
1 /* glob.c: This file contains the global command routines for the ed line
2    editor */
3 /*-
4  * Copyright (c) 1993 Andrew Moore, Talke Studio.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 
32 #include <sys/types.h>
33 #include <sys/ioctl.h>
34 #include <sys/wait.h>
35 
36 #include "ed.h"
37 
38 
39 /* build_active_list:  add line matching a pattern to the global-active list */
40 int
41 build_active_list(int isgcmd)
42 {
43 	pattern_t *pat;
44 	line_t *lp;
45 	long n;
46 	char *s;
47 	char delimiter;
48 
49 	if ((delimiter = *ibufp) == ' ' || delimiter == '\n') {
50 		errmsg = "invalid pattern delimiter";
51 		return ERR;
52 	} else if ((pat = get_compiled_pattern()) == NULL)
53 		return ERR;
54 	else if (*ibufp == delimiter)
55 		ibufp++;
56 	clear_active_list();
57 	lp = get_addressed_line_node(first_addr);
58 	for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) {
59 		if ((s = get_sbuf_line(lp)) == NULL)
60 			return ERR;
61 		if (isbinary)
62 			NUL_TO_NEWLINE(s, lp->len);
63 		if (!(regexec(pat, s, 0, NULL, 0) == isgcmd) &&
64 		    set_active_node(lp) < 0)
65 			return ERR;
66 	}
67 	return 0;
68 }
69 
70 
71 /* exec_global: apply command list in the command buffer to the active
72    lines in a range; return command status */
73 long
74 exec_global(int interact, int gflag)
75 {
76 	static char *ocmd = NULL;
77 	static int ocmdsz = 0;
78 
79 	line_t *lp = NULL;
80 	int status;
81 	int n;
82 	char *cmd = NULL;
83 
84 #ifdef BACKWARDS
85 	if (!interact)
86 		if (!strcmp(ibufp, "\n"))
87 			cmd = "p\n";		/* null cmd-list == `p' */
88 		else if ((cmd = get_extended_line(&n, 0)) == NULL)
89 			return ERR;
90 #else
91 	if (!interact && (cmd = get_extended_line(&n, 0)) == NULL)
92 		return ERR;
93 #endif
94 	clear_undo_stack();
95 	while ((lp = next_active_node()) != NULL) {
96 		if ((current_addr = get_line_node_addr(lp)) < 0)
97 			return ERR;
98 		if (interact) {
99 			/* print current_addr; get a command in global syntax */
100 			if (display_lines(current_addr, current_addr, gflag) < 0)
101 				return ERR;
102 			while ((n = get_tty_line()) > 0 &&
103 			    ibuf[n - 1] != '\n')
104 				clearerr(stdin);
105 			if (n < 0)
106 				return ERR;
107 			else if (n == 0) {
108 				errmsg = "unexpected end-of-file";
109 				return ERR;
110 			} else if (n == 1 && !strcmp(ibuf, "\n"))
111 				continue;
112 			else if (n == 2 && !strcmp(ibuf, "&\n")) {
113 				if (cmd == NULL) {
114 					errmsg = "no previous command";
115 					return ERR;
116 				} else cmd = ocmd;
117 			} else if ((cmd = get_extended_line(&n, 0)) == NULL)
118 				return ERR;
119 			else {
120 				REALLOC(ocmd, ocmdsz, n + 1, ERR);
121 				memcpy(ocmd, cmd, n + 1);
122 				cmd = ocmd;
123 			}
124 
125 		}
126 		ibufp = cmd;
127 		for (; *ibufp;)
128 			if ((status = extract_addr_range()) < 0 ||
129 			    (status = exec_command()) < 0 ||
130 			    (status > 0 && (status = display_lines(
131 			    current_addr, current_addr, status)) < 0))
132 				return status;
133 	}
134 	return 0;
135 }
136 
137 
138 static line_t **active_list;	/* list of lines active in a global command */
139 static long active_last;	/* index of last active line in active_list */
140 static long active_size;	/* size of active_list */
141 static long active_ptr;		/* active_list index (non-decreasing) */
142 static long active_ndx;		/* active_list index (modulo active_last) */
143 
144 /* set_active_node: add a line node to the global-active list */
145 int
146 set_active_node(line_t *lp)
147 {
148 	if (active_last + 1 > active_size) {
149 		size_t ti = active_size;
150 		line_t **ts;
151 		SPL1();
152 #if defined(sun) || defined(NO_REALLOC_NULL)
153 		if (active_list != NULL) {
154 #endif
155 			if ((ts = (line_t **) realloc(active_list,
156 			    (ti += MINBUFSZ) * sizeof(line_t *))) == NULL) {
157 				fprintf(stderr, "%s\n", strerror(errno));
158 				errmsg = "out of memory";
159 				SPL0();
160 				return ERR;
161 			}
162 #if defined(sun) || defined(NO_REALLOC_NULL)
163 		} else {
164 			if ((ts = (line_t **) malloc((ti += MINBUFSZ) *
165 			    sizeof(line_t **))) == NULL) {
166 				fprintf(stderr, "%s\n", strerror(errno));
167 				errmsg = "out of memory";
168 				SPL0();
169 				return ERR;
170 			}
171 		}
172 #endif
173 		active_size = ti;
174 		active_list = ts;
175 		SPL0();
176 	}
177 	active_list[active_last++] = lp;
178 	return 0;
179 }
180 
181 
182 /* unset_active_nodes: remove a range of lines from the global-active list */
183 void
184 unset_active_nodes(line_t *np, line_t *mp)
185 {
186 	line_t *lp;
187 	long i;
188 
189 	for (lp = np; lp != mp; lp = lp->q_forw)
190 		for (i = 0; i < active_last; i++)
191 			if (active_list[active_ndx] == lp) {
192 				active_list[active_ndx] = NULL;
193 				active_ndx = INC_MOD(active_ndx, active_last - 1);
194 				break;
195 			} else	active_ndx = INC_MOD(active_ndx, active_last - 1);
196 }
197 
198 
199 /* next_active_node: return the next global-active line node */
200 line_t *
201 next_active_node(void)
202 {
203 	while (active_ptr < active_last && active_list[active_ptr] == NULL)
204 		active_ptr++;
205 	return (active_ptr < active_last) ? active_list[active_ptr++] : NULL;
206 }
207 
208 
209 /* clear_active_list: clear the global-active list */
210 void
211 clear_active_list(void)
212 {
213 	SPL1();
214 	active_size = active_last = active_ptr = active_ndx = 0;
215 	free(active_list);
216 	active_list = NULL;
217 	SPL0();
218 }
219