1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1987, 1993, 1994
5 * The Regents of the University of California. 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 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 #if 0
33 #ifndef lint
34 static char sccsid[] = "@(#)tree.c 8.3 (Berkeley) 4/2/94";
35 #endif
36 #endif
37
38 #include <sys/cdefs.h>
39 #include <err.h>
40 #include <limits.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44
45 #include "ctags.h"
46
47 static void add_node(NODE *, NODE *);
48 static void free_tree(NODE *);
49
50 /*
51 * pfnote --
52 * enter a new node in the tree
53 */
54 void
pfnote(const char * name,int ln)55 pfnote(const char *name, int ln)
56 {
57 NODE *np;
58 char *fp;
59 char nbuf[MAXTOKEN];
60
61 /*NOSTRICT*/
62 if (!(np = (NODE *)malloc(sizeof(NODE)))) {
63 warnx("too many entries to sort");
64 put_entries(head);
65 free_tree(head);
66 /*NOSTRICT*/
67 if (!(head = np = (NODE *)malloc(sizeof(NODE))))
68 errx(1, "out of space");
69 }
70 if (!xflag && !strcmp(name, "main")) {
71 if (!(fp = strrchr(curfile, '/')))
72 fp = curfile;
73 else
74 ++fp;
75 (void)snprintf(nbuf, sizeof(nbuf), "M%s", fp);
76 fp = strrchr(nbuf, '.');
77 if (fp && !fp[2])
78 *fp = EOS;
79 name = nbuf;
80 }
81 if (!(np->entry = strdup(name)))
82 err(1, NULL);
83 np->file = curfile;
84 np->lno = ln;
85 np->left = np->right = 0;
86 if (!(np->pat = strdup(lbuf)))
87 err(1, NULL);
88 if (!head)
89 head = np;
90 else
91 add_node(np, head);
92 }
93
94 static void
add_node(NODE * node,NODE * cur_node)95 add_node(NODE *node, NODE *cur_node)
96 {
97 int dif;
98
99 dif = strcoll(node->entry, cur_node->entry);
100 if (!dif) {
101 if (node->file == cur_node->file) {
102 if (!wflag)
103 fprintf(stderr, "Duplicate entry in file %s, line %d: %s\nSecond entry ignored\n", node->file, lineno, node->entry);
104 return;
105 }
106 if (!cur_node->been_warned)
107 if (!wflag)
108 fprintf(stderr, "Duplicate entry in files %s and %s: %s (Warning only)\n", node->file, cur_node->file, node->entry);
109 cur_node->been_warned = true;
110 }
111 else if (dif < 0)
112 if (cur_node->left)
113 add_node(node, cur_node->left);
114 else
115 cur_node->left = node;
116 else if (cur_node->right)
117 add_node(node, cur_node->right);
118 else
119 cur_node->right = node;
120 }
121
122 static void
free_tree(NODE * node)123 free_tree(NODE *node)
124 {
125 NODE *node_next;
126 while (node) {
127 if (node->right)
128 free_tree(node->right);
129 node_next = node->left;
130 free(node);
131 node = node_next;
132 }
133 }
134