ctags.c revision 1590 
1/*
2 * Copyright (c) 1987, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char copyright[] =
36"@(#) Copyright (c) 1987, 1993, 1994\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)ctags.c	8.3 (Berkeley) 4/2/94";
42#endif /* not lint */
43
44#include <err.h>
45#include <limits.h>
46#include <stdio.h>
47#include <string.h>
48#include <stdlib.h>
49#include <unistd.h>
50
51#include "ctags.h"
52
53/*
54 * ctags: create a tags file
55 */
56
57NODE	*head;			/* head of the sorted binary tree */
58
59				/* boolean "func" (see init()) */
60bool	_wht[256], _etk[256], _itk[256], _btk[256], _gd[256];
61
62FILE	*inf;			/* ioptr for current input file */
63FILE	*outf;			/* ioptr for tags file */
64
65long	lineftell;		/* ftell after getc( inf ) == '\n' */
66
67int	lineno;			/* line number of current line */
68int	dflag;			/* -d: non-macro defines */
69int	tflag;			/* -t: create tags for typedefs */
70int	vflag;			/* -v: vgrind style index output */
71int	wflag;			/* -w: suppress warnings */
72int	xflag;			/* -x: cxref style output */
73
74char	*curfile;		/* current input file name */
75char	searchar = '/';		/* use /.../ searches by default */
76char	lbuf[LINE_MAX];
77
78void	init __P((void));
79void	find_entries __P((char *));
80
81int
82main(argc, argv)
83	int	argc;
84	char	**argv;
85{
86	static char	*outfile = "tags";	/* output file */
87	int	aflag;				/* -a: append to tags */
88	int	uflag;				/* -u: update tags */
89	int	exit_val;			/* exit value */
90	int	step;				/* step through args */
91	int	ch;				/* getopts char */
92	char	cmd[100];			/* too ugly to explain */
93
94	aflag = uflag = NO;
95	while ((ch = getopt(argc, argv, "BFadf:tuwvx")) != EOF)
96		switch(ch) {
97		case 'B':
98			searchar = '?';
99			break;
100		case 'F':
101			searchar = '/';
102			break;
103		case 'a':
104			aflag++;
105			break;
106		case 'd':
107			dflag++;
108			break;
109		case 'f':
110			outfile = optarg;
111			break;
112		case 't':
113			tflag++;
114			break;
115		case 'u':
116			uflag++;
117			break;
118		case 'w':
119			wflag++;
120			break;
121		case 'v':
122			vflag++;
123		case 'x':
124			xflag++;
125			break;
126		case '?':
127		default:
128			goto usage;
129		}
130	argv += optind;
131	argc -= optind;
132	if (!argc) {
133usage:		(void)fprintf(stderr,
134			"usage: ctags [-BFadtuwvx] [-f tagsfile] file ...");
135		exit(1);
136	}
137
138	init();
139
140	for (exit_val = step = 0; step < argc; ++step)
141		if (!(inf = fopen(argv[step], "r"))) {
142			warn("%s", argv[step]);
143			exit_val = 1;
144		}
145		else {
146			curfile = argv[step];
147			find_entries(argv[step]);
148			(void)fclose(inf);
149		}
150
151	if (head)
152		if (xflag)
153			put_entries(head);
154		else {
155			if (uflag) {
156				for (step = 0; step < argc; step++) {
157					(void)sprintf(cmd,
158						"mv %s OTAGS; fgrep -v '\t%s\t' OTAGS >%s; rm OTAGS",
159							outfile, argv[step],
160							outfile);
161					system(cmd);
162				}
163				++aflag;
164			}
165			if (!(outf = fopen(outfile, aflag ? "a" : "w")))
166				err(exit_val, "%s", outfile);
167			put_entries(head);
168			(void)fclose(outf);
169			if (uflag) {
170				(void)sprintf(cmd, "sort -o %s %s",
171						outfile, outfile);
172				system(cmd);
173			}
174		}
175	exit(exit_val);
176}
177
178/*
179 * init --
180 *	this routine sets up the boolean psuedo-functions which work by
181 *	setting boolean flags dependent upon the corresponding character.
182 *	Every char which is NOT in that string is false with respect to
183 *	the pseudo-function.  Therefore, all of the array "_wht" is NO
184 *	by default and then the elements subscripted by the chars in
185 *	CWHITE are set to YES.  Thus, "_wht" of a char is YES if it is in
186 *	the string CWHITE, else NO.
187 */
188void
189init()
190{
191	int		i;
192	unsigned char	*sp;
193
194	for (i = 0; i < 256; i++) {
195		_wht[i] = _etk[i] = _itk[i] = _btk[i] = NO;
196		_gd[i] = YES;
197	}
198#define	CWHITE	" \f\t\n"
199	for (sp = CWHITE; *sp; sp++)	/* white space chars */
200		_wht[*sp] = YES;
201#define	CTOKEN	" \t\n\"'#()[]{}=-+%*/&|^~!<>;,.:?"
202	for (sp = CTOKEN; *sp; sp++)	/* token ending chars */
203		_etk[*sp] = YES;
204#define	CINTOK	"ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz0123456789"
205	for (sp = CINTOK; *sp; sp++)	/* valid in-token chars */
206		_itk[*sp] = YES;
207#define	CBEGIN	"ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz"
208	for (sp = CBEGIN; *sp; sp++)	/* token starting chars */
209		_btk[*sp] = YES;
210#define	CNOTGD	",;"
211	for (sp = CNOTGD; *sp; sp++)	/* invalid after-function chars */
212		_gd[*sp] = NO;
213}
214
215/*
216 * find_entries --
217 *	this routine opens the specified file and calls the function
218 *	which searches the file.
219 */
220void
221find_entries(file)
222	char	*file;
223{
224	char	*cp;
225
226	lineno = 0;				/* should be 1 ?? KB */
227	if (cp = strrchr(file, '.')) {
228		if (cp[1] == 'l' && !cp[2]) {
229			int	c;
230
231			for (;;) {
232				if (GETC(==, EOF))
233					return;
234				if (!iswhite(c)) {
235					rewind(inf);
236					break;
237				}
238			}
239#define	LISPCHR	";(["
240/* lisp */		if (strchr(LISPCHR, c)) {
241				l_entries();
242				return;
243			}
244/* lex */		else {
245				/*
246				 * we search all 3 parts of a lex file
247				 * for C references.  This may be wrong.
248				 */
249				toss_yysec();
250				(void)strcpy(lbuf, "%%$");
251				pfnote("yylex", lineno);
252				rewind(inf);
253			}
254		}
255/* yacc */	else if (cp[1] == 'y' && !cp[2]) {
256			/*
257			 * we search only the 3rd part of a yacc file
258			 * for C references.  This may be wrong.
259			 */
260			toss_yysec();
261			(void)strcpy(lbuf, "%%$");
262			pfnote("yyparse", lineno);
263			y_entries();
264		}
265/* fortran */	else if ((cp[1] != 'c' && cp[1] != 'h') && !cp[2]) {
266			if (PF_funcs())
267				return;
268			rewind(inf);
269		}
270	}
271/* C */	c_entries();
272}
273