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 #include <sys/cdefs.h>
33 #include <limits.h>
34 #include <stdio.h>
35 #include <unistd.h>
36
37 #include "ctags.h"
38
39 /*
40 * get_line --
41 * get the line the token of interest occurred on,
42 * prepare it for printing.
43 */
44 void
get_line(void)45 get_line(void)
46 {
47 long saveftell;
48 int c;
49 int cnt;
50 char *cp;
51
52 saveftell = ftell(inf);
53 (void)fseek(inf, lineftell, L_SET);
54 if (xflag)
55 for (cp = lbuf; GETC(!=, EOF) && c != '\n'; *cp++ = c)
56 continue;
57 /*
58 * do all processing here, so we don't step through the
59 * line more than once; means you don't call this routine
60 * unless you're sure you've got a keeper.
61 */
62 else for (cnt = 0, cp = lbuf; GETC(!=, EOF) && cnt < ENDLINE; ++cnt) {
63 if (c == '\\') { /* backslashes */
64 if (cnt > ENDLINE - 2)
65 break;
66 *cp++ = '\\'; *cp++ = '\\';
67 ++cnt;
68 }
69 else if (c == (int)searchar) { /* search character */
70 if (cnt > ENDLINE - 2)
71 break;
72 *cp++ = '\\'; *cp++ = c;
73 ++cnt;
74 }
75 else if (c == '\n') { /* end of keep */
76 *cp++ = '$'; /* can find whole line */
77 break;
78 }
79 else
80 *cp++ = c;
81 }
82 *cp = EOS;
83 (void)fseek(inf, saveftell, L_SET);
84 }
85
86 /*
87 * put_entries --
88 * write out the tags
89 */
90 void
put_entries(NODE * node)91 put_entries(NODE *node)
92 {
93
94 if (node->left)
95 put_entries(node->left);
96 if (vflag)
97 printf("%s %s %d\n",
98 node->entry, node->file, (node->lno + 63) / 64);
99 else if (xflag)
100 printf("%-16s %4d %-16s %s\n",
101 node->entry, node->lno, node->file, node->pat);
102 else
103 fprintf(outf, "%s\t%s\t%c^%s%c\n",
104 node->entry, node->file, searchar, node->pat, searchar);
105 if (node->right)
106 put_entries(node->right);
107 }
108