diff options
Diffstat (limited to 'usr.bin/ctags/tree.c')
-rw-r--r-- | usr.bin/ctags/tree.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/usr.bin/ctags/tree.c b/usr.bin/ctags/tree.c new file mode 100644 index 0000000..61decd2 --- /dev/null +++ b/usr.bin/ctags/tree.c @@ -0,0 +1,135 @@ +/* + * Copyright (c) 1987, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)tree.c 8.3 (Berkeley) 4/2/94"; +#endif /* not lint */ + +#include <err.h> +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "ctags.h" + +static void add_node __P((NODE *, NODE *)); +static void free_tree __P((NODE *)); + +/* + * pfnote -- + * enter a new node in the tree + */ +void +pfnote(name, ln) + char *name; + int ln; +{ + NODE *np; + char *fp; + char nbuf[MAXTOKEN]; + + /*NOSTRICT*/ + if (!(np = (NODE *)malloc(sizeof(NODE)))) { + warnx("too many entries to sort"); + put_entries(head); + free_tree(head); + /*NOSTRICT*/ + if (!(head = np = (NODE *)malloc(sizeof(NODE)))) + err(1, "out of space"); + } + if (!xflag && !strcmp(name, "main")) { + if (!(fp = strrchr(curfile, '/'))) + fp = curfile; + else + ++fp; + (void)sprintf(nbuf, "M%s", fp); + fp = strrchr(nbuf, '.'); + if (fp && !fp[2]) + *fp = EOS; + name = nbuf; + } + if (!(np->entry = strdup(name))) + err(1, NULL); + np->file = curfile; + np->lno = ln; + np->left = np->right = 0; + if (!(np->pat = strdup(lbuf))) + err(1, NULL); + if (!head) + head = np; + else + add_node(np, head); +} + +static void +add_node(node, cur_node) + NODE *node, + *cur_node; +{ + int dif; + + dif = strcmp(node->entry, cur_node->entry); + if (!dif) { + if (node->file == cur_node->file) { + if (!wflag) + fprintf(stderr, "Duplicate entry in file %s, line %d: %s\nSecond entry ignored\n", node->file, lineno, node->entry); + return; + } + if (!cur_node->been_warned) + if (!wflag) + fprintf(stderr, "Duplicate entry in files %s and %s: %s (Warning only)\n", node->file, cur_node->file, node->entry); + cur_node->been_warned = YES; + } + else if (dif < 0) + if (cur_node->left) + add_node(node, cur_node->left); + else + cur_node->left = node; + else if (cur_node->right) + add_node(node, cur_node->right); + else + cur_node->right = node; +} + +static void +free_tree(node) + NODE *node; +{ + while (node) { + if (node->right) + free_tree(node->right); + free(node); + node = node->left; + } +} |