1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1987, 1993, 1994, 1995
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 #ifndef lint
33 static const char copyright[] =
34 "@(#) Copyright (c) 1987, 1993, 1994, 1995\n\
35 The Regents of the University of California. All rights reserved.\n";
36 #endif
37
38 #if 0
39 #ifndef lint
40 static char sccsid[] = "@(#)ctags.c 8.4 (Berkeley) 2/7/95";
41 #endif
42 #endif
43
44 #include <sys/cdefs.h>
45 #include <sys/types.h>
46 #include <sys/stat.h>
47 #include <sys/wait.h>
48
49 #include <err.h>
50 #include <errno.h>
51 #include <limits.h>
52 #include <locale.h>
53 #include <regex.h>
54 #include <stdio.h>
55 #include <stdlib.h>
56 #include <string.h>
57 #include <unistd.h>
58
59 #include "ctags.h"
60
61 /*
62 * ctags: create a tags file
63 */
64
65 NODE *head; /* head of the sorted binary tree */
66
67 /* boolean "func" (see init()) */
68 bool _wht[256], _etk[256], _itk[256], _btk[256], _gd[256];
69
70 FILE *inf; /* ioptr for current input file */
71 FILE *outf; /* ioptr for tags file */
72
73 long lineftell; /* ftell after getc( inf ) == '\n' */
74
75 int lineno; /* line number of current line */
76 int dflag; /* -d: non-macro defines */
77 int tflag; /* -t: create tags for typedefs */
78 int vflag; /* -v: vgrind style index output */
79 int wflag; /* -w: suppress warnings */
80 int xflag; /* -x: cxref style output */
81
82 char *curfile; /* current input file name */
83 char searchar = '/'; /* use /.../ searches by default */
84 char lbuf[LINE_MAX];
85
86 void init(void);
87 void find_entries(char *);
88 static void usage(void) __dead2;
89
90 int
main(int argc,char ** argv)91 main(int argc, char **argv)
92 {
93 static const char *outfile = "tags"; /* output file */
94 int aflag; /* -a: append to tags */
95 int uflag; /* -u: update tags */
96 int exit_val; /* exit value */
97 int step; /* step through args */
98 int ch; /* getopts char */
99
100 setlocale(LC_ALL, "");
101
102 aflag = uflag = false;
103 tflag = true;
104 while ((ch = getopt(argc, argv, "BFTadf:tuwvx")) != -1)
105 switch(ch) {
106 case 'B':
107 searchar = '?';
108 break;
109 case 'F':
110 searchar = '/';
111 break;
112 case 'T':
113 tflag = false;
114 break;
115 case 'a':
116 aflag++;
117 break;
118 case 'd':
119 dflag++;
120 break;
121 case 'f':
122 outfile = optarg;
123 break;
124 case 't':
125 tflag = true;
126 break;
127 case 'u':
128 uflag++;
129 break;
130 case 'w':
131 wflag++;
132 break;
133 case 'v':
134 vflag++;
135 case 'x':
136 xflag++;
137 break;
138 case '?':
139 default:
140 usage();
141 }
142 argv += optind;
143 argc -= optind;
144 if (!argc)
145 usage();
146
147 if (strcmp(outfile, "-") == 0)
148 outfile = "/dev/stdout";
149
150 if (!xflag)
151 setlocale(LC_COLLATE, "C");
152
153 init();
154
155 for (exit_val = step = 0; step < argc; ++step)
156 if (!(inf = fopen(argv[step], "r"))) {
157 warn("%s", argv[step]);
158 exit_val = 1;
159 }
160 else {
161 curfile = argv[step];
162 find_entries(argv[step]);
163 (void)fclose(inf);
164 }
165
166 if (head) {
167 if (xflag)
168 put_entries(head);
169 else {
170 if (uflag) {
171 struct stat sb;
172 FILE *oldf;
173 regex_t *regx;
174
175 if ((oldf = fopen(outfile, "r")) == NULL) {
176 if (errno == ENOENT) {
177 uflag = 0;
178 goto udone;
179 }
180 err(1, "opening %s", outfile);
181 }
182 if (fstat(fileno(oldf), &sb) != 0 ||
183 !S_ISREG(sb.st_mode)) {
184 fclose(oldf);
185 uflag = 0;
186 goto udone;
187 }
188 if (unlink(outfile))
189 err(1, "unlinking %s", outfile);
190 if ((outf = fopen(outfile, "w")) == NULL)
191 err(1, "recreating %s", outfile);
192 if ((regx = calloc(argc, sizeof(regex_t))) == NULL)
193 err(1, "RE alloc");
194 for (step = 0; step < argc; step++) {
195 (void)strcpy(lbuf, "\t");
196 (void)strlcat(lbuf, argv[step], LINE_MAX);
197 (void)strlcat(lbuf, "\t", LINE_MAX);
198 if (regcomp(regx + step, lbuf,
199 REG_NOSPEC))
200 warn("RE compilation failed");
201 }
202 nextline:
203 while (fgets(lbuf, LINE_MAX, oldf)) {
204 for (step = 0; step < argc; step++)
205 if (regexec(regx + step,
206 lbuf, 0, NULL, 0) == 0)
207 goto nextline;
208 fputs(lbuf, outf);
209 }
210 for (step = 0; step < argc; step++)
211 regfree(regx + step);
212 free(regx);
213 fclose(oldf);
214 fclose(outf);
215 ++aflag;
216 }
217 udone:
218 if (!(outf = fopen(outfile, aflag ? "a" : "w")))
219 err(1, "%s", outfile);
220 put_entries(head);
221 (void)fclose(outf);
222 if (uflag) {
223 pid_t pid;
224
225 if ((pid = fork()) == -1)
226 err(1, "fork failed");
227 else if (pid == 0) {
228 execlp("sort", "sort", "-o", outfile,
229 outfile, NULL);
230 err(1, "exec of sort failed");
231 }
232 /* Just assume the sort went OK. The old code
233 did not do any checks either. */
234 (void)wait(NULL);
235 }
236 }
237 }
238 if (ferror(stdout) != 0 || fflush(stdout) != 0)
239 err(1, "stdout");
240 exit(exit_val);
241 }
242
243 static void
usage(void)244 usage(void)
245 {
246 (void)fprintf(stderr, "usage: ctags [-BFTaduwvx] [-f tagsfile] file ...\n");
247 exit(1);
248 }
249
250 /*
251 * init --
252 * this routine sets up the boolean pseudo-functions which work by
253 * setting boolean flags dependent upon the corresponding character.
254 * Every char which is NOT in that string is false with respect to
255 * the pseudo-function. Therefore, all of the array "_wht" is NO
256 * by default and then the elements subscripted by the chars in
257 * CWHITE are set to YES. Thus, "_wht" of a char is YES if it is in
258 * the string CWHITE, else NO.
259 */
260 void
init(void)261 init(void)
262 {
263 int i;
264 const unsigned char *sp;
265
266 for (i = 0; i < 256; i++) {
267 _wht[i] = _etk[i] = _itk[i] = _btk[i] = false;
268 _gd[i] = true;
269 }
270 #define CWHITE " \f\t\n"
271 for (sp = CWHITE; *sp; sp++) /* white space chars */
272 _wht[*sp] = true;
273 #define CTOKEN " \t\n\"'#()[]{}=-+%*/&|^~!<>;,.:?"
274 for (sp = CTOKEN; *sp; sp++) /* token ending chars */
275 _etk[*sp] = true;
276 #define CINTOK "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz0123456789"
277 for (sp = CINTOK; *sp; sp++) /* valid in-token chars */
278 _itk[*sp] = true;
279 #define CBEGIN "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz"
280 for (sp = CBEGIN; *sp; sp++) /* token starting chars */
281 _btk[*sp] = true;
282 #define CNOTGD ",;"
283 for (sp = CNOTGD; *sp; sp++) /* invalid after-function chars */
284 _gd[*sp] = false;
285 }
286
287 /*
288 * find_entries --
289 * this routine opens the specified file and calls the function
290 * which searches the file.
291 */
292 void
find_entries(char * file)293 find_entries(char *file)
294 {
295 char *cp;
296
297 lineno = 0; /* should be 1 ?? KB */
298 if ((cp = strrchr(file, '.'))) {
299 if (cp[1] == 'l' && !cp[2]) {
300 int c;
301
302 for (;;) {
303 if (GETC(==, EOF))
304 return;
305 if (!iswhite(c)) {
306 rewind(inf);
307 break;
308 }
309 }
310 #define LISPCHR ";(["
311 /* lisp */ if (strchr(LISPCHR, c)) {
312 l_entries();
313 return;
314 }
315 /* lex */ else {
316 /*
317 * we search all 3 parts of a lex file
318 * for C references. This may be wrong.
319 */
320 toss_yysec();
321 (void)strcpy(lbuf, "%%$");
322 pfnote("yylex", lineno);
323 rewind(inf);
324 }
325 }
326 /* yacc */ else if (cp[1] == 'y' && !cp[2]) {
327 /*
328 * we search only the 3rd part of a yacc file
329 * for C references. This may be wrong.
330 */
331 toss_yysec();
332 (void)strcpy(lbuf, "%%$");
333 pfnote("yyparse", lineno);
334 y_entries();
335 }
336 /* fortran */ else if ((cp[1] != 'c' && cp[1] != 'h') && !cp[2]) {
337 if (PF_funcs())
338 return;
339 rewind(inf);
340 }
341 }
342 /* C */ c_entries();
343 }
344