usr.bin/ctags/tree.c

   1 /*      $NetBSD: tree.c,v 1.12 2006/04/05 19:38:47 dsl Exp $    */
   2
   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 HAVE_NBTOOL_CONFIG_H
  33 #include "nbtool_config.h"
  34 #endif
  35
  36 #include <sys/cdefs.h>
  37 #if defined(__RCSID) && !defined(lint)
  38 #if 0
  39 static char sccsid[] = "@(#)tree.c      8.3 (Berkeley) 4/2/94";
  40 #else
  41 __RCSID("$NetBSD: tree.c,v 1.12 2006/04/05 19:38:47 dsl Exp $");
  42 #endif
  43 #endif /* not lint */
  44
  45 #include <err.h>
  46 #include <limits.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50
  51 #include "ctags.h"
  52
  53 static void     add_node(NODE *, NODE *);
  54 static void     free_tree(NODE *);
  55
  56 /*
  57  * pfnote --
  58  *      enter a new node in the tree
  59  */
  60 void
  61 pfnote(const char *name, int ln)
  62 {
  63         NODE    *np;
  64         char    *fp;
  65         char    nbuf[MAXTOKEN];
  66
  67         /*NOSTRICT*/
  68         if (!(np = (NODE *)malloc(sizeof(NODE)))) {
  69                 warnx("too many entries to sort");
  70                 put_entries(head);
  71                 free_tree(head);
  72                 /*NOSTRICT*/
  73                 if (!(head = np = (NODE *)malloc(sizeof(NODE))))
  74                         err(1, "out of space");
  75         }
  76         if (!xflag && !strcmp(name, "main")) {
  77                 if (!(fp = strrchr(curfile, '/')))
  78                         fp = curfile;
  79                 else
  80                         ++fp;
  81                 (void)snprintf(nbuf, sizeof(nbuf), "M%s", fp);
  82                 fp = strrchr(nbuf, '.');
  83                 if (fp && !fp[2])
  84                         *fp = EOS;
  85                 name = nbuf;
  86         }
  87         if (!(np->entry = strdup(name)))
  88                 err(1, "strdup");
  89         np->file = curfile;
  90         np->lno = ln;
  91         np->left = np->right = 0;
  92         if (!(np->pat = strdup(lbuf)))
  93                 err(1, "strdup");
  94         if (!head)
  95                 head = np;
  96         else
  97                 add_node(np, head);
  98 }
  99
 100 static void
 101 add_node(NODE *node, NODE *cur_node)
 102 {
 103         int     dif;
 104
 105         dif = strcmp(node->entry, cur_node->entry);
 106         if (!dif) {
 107                 if (node->file == cur_node->file) {
 108                         if (!wflag)
 109                                 fprintf(stderr, "Duplicate entry in file %s, line %d: %s\nSecond entry ignored\n", node->file, lineno, node->entry);
 110                         return;
 111                 }
 112                 if (!cur_node->been_warned)
 113                         if (!wflag)
 114                                 fprintf(stderr, "Duplicate entry in files %s and %s: %s (Warning only)\n", node->file, cur_node->file, node->entry);
 115                 cur_node->been_warned = YES;
 116         }
 117         else if (dif < 0) {
 118                 if (cur_node->left)
 119                         add_node(node, cur_node->left);
 120                 else
 121                         cur_node->left = node;
 122         } else {
 123                 if (cur_node->right)
 124                         add_node(node, cur_node->right);
 125                 else
 126                         cur_node->right = node;
 127         }
 128 }
 129
 130 static void
 131 free_tree(NODE *node)
 132 {
 133         NODE *nnode;
 134
 135         for (; node != NULL; node = nnode) {
 136                 nnode = node->left;
 137                 if (node->right) {
 138                         if (nnode == NULL)
 139                                 nnode = node->right;
 140                         else
 141                                 free_tree(node->right);
 142                 }
 143                 free(node);
 144         }
 145 }