Annotation of src/usr.bin/ctags/tree.c, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: tree.c,v 1.4 1995/03/26 20:14:11 glass 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. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by the University of
! 18: * California, Berkeley and its contributors.
! 19: * 4. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: */
! 35:
! 36: #ifndef lint
! 37: #if 0
! 38: static char sccsid[] = "@(#)tree.c 8.3 (Berkeley) 4/2/94";
! 39: #else
! 40: static char rcsid[] = "$NetBSD: tree.c,v 1.4 1995/03/26 20:14:11 glass Exp $";
! 41: #endif
! 42: #endif /* not lint */
! 43:
! 44: #include <err.h>
! 45: #include <limits.h>
! 46: #include <stdio.h>
! 47: #include <stdlib.h>
! 48: #include <string.h>
! 49:
! 50: #include "ctags.h"
! 51:
! 52: static void add_node __P((NODE *, NODE *));
! 53: static void free_tree __P((NODE *));
! 54:
! 55: /*
! 56: * pfnote --
! 57: * enter a new node in the tree
! 58: */
! 59: void
! 60: pfnote(name, ln)
! 61: char *name;
! 62: int ln;
! 63: {
! 64: NODE *np;
! 65: char *fp;
! 66: char nbuf[MAXTOKEN];
! 67:
! 68: /*NOSTRICT*/
! 69: if (!(np = (NODE *)malloc(sizeof(NODE)))) {
! 70: warnx("too many entries to sort");
! 71: put_entries(head);
! 72: free_tree(head);
! 73: /*NOSTRICT*/
! 74: if (!(head = np = (NODE *)malloc(sizeof(NODE))))
! 75: err(1, "out of space");
! 76: }
! 77: if (!xflag && !strcmp(name, "main")) {
! 78: if (!(fp = strrchr(curfile, '/')))
! 79: fp = curfile;
! 80: else
! 81: ++fp;
! 82: (void)sprintf(nbuf, "M%s", fp);
! 83: fp = strrchr(nbuf, '.');
! 84: if (fp && !fp[2])
! 85: *fp = EOS;
! 86: name = nbuf;
! 87: }
! 88: if (!(np->entry = strdup(name)))
! 89: err(1, NULL);
! 90: np->file = curfile;
! 91: np->lno = ln;
! 92: np->left = np->right = 0;
! 93: if (!(np->pat = strdup(lbuf)))
! 94: err(1, NULL);
! 95: if (!head)
! 96: head = np;
! 97: else
! 98: add_node(np, head);
! 99: }
! 100:
! 101: static void
! 102: add_node(node, cur_node)
! 103: NODE *node,
! 104: *cur_node;
! 105: {
! 106: int dif;
! 107:
! 108: dif = strcmp(node->entry, cur_node->entry);
! 109: if (!dif) {
! 110: if (node->file == cur_node->file) {
! 111: if (!wflag)
! 112: fprintf(stderr, "Duplicate entry in file %s, line %d: %s\nSecond entry ignored\n", node->file, lineno, node->entry);
! 113: return;
! 114: }
! 115: if (!cur_node->been_warned)
! 116: if (!wflag)
! 117: fprintf(stderr, "Duplicate entry in files %s and %s: %s (Warning only)\n", node->file, cur_node->file, node->entry);
! 118: cur_node->been_warned = YES;
! 119: }
! 120: else if (dif < 0)
! 121: if (cur_node->left)
! 122: add_node(node, cur_node->left);
! 123: else
! 124: cur_node->left = node;
! 125: else if (cur_node->right)
! 126: add_node(node, cur_node->right);
! 127: else
! 128: cur_node->right = node;
! 129: }
! 130:
! 131: static void
! 132: free_tree(node)
! 133: NODE *node;
! 134: {
! 135: while (node) {
! 136: if (node->right)
! 137: free_tree(node->right);
! 138: free(node);
! 139: node = node->left;
! 140: }
! 141: }
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