glbl.c
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: src/bin/ed/glbl.c,v 1.13 2002/06/30 05:13:53 obrien Exp $");
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 if (!interact) {
85 if (posixly_correct) {
86 if ((cmd = get_extended_line(&n, 0)) == NULL)
87 return ERR;
88 } else if (!strcmp(ibufp, "\n"))
89 cmd = "p\n"; /* null cmd-list == `p' */
90 else if ((cmd = get_extended_line(&n, 0)) == NULL)
91 return ERR;
92 }
93 clear_undo_stack();
94 while ((lp = next_active_node()) != NULL) {
95 if ((current_addr = get_line_node_addr(lp)) < 0)
96 return ERR;
97 if (interact) {
98 /* print current_addr; get a command in global syntax */
99 gflag |= GINT;
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 line_t **active_list; /* list of lines active in a global command */
139 long active_last; /* index of last active line in active_list */
140 long active_size; /* size of active_list */
141 long active_ptr; /* active_list index (non-decreasing) */
142 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 int 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 }
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