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1 /*
2  * Copyright (c) 1987, 1993, 1994, 1995
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  * 4. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29
30 #ifndef lint
31 static const char copyright[] =
32 "@(#) Copyright (c) 1987, 1993, 1994, 1995\n\
33         The Regents of the University of California.  All rights reserved.\n";
34 #endif
35
36 #if 0
37 #ifndef lint
38 static char sccsid[] = "@(#)ctags.c     8.4 (Berkeley) 2/7/95";
39 #endif
40 #endif
41
42 #include <sys/cdefs.h>
43 #include <sys/types.h>
44 #include <sys/wait.h>
45 __FBSDID("$FreeBSD$");
46
47 #include <err.h>
48 #include <limits.h>
49 #include <locale.h>
50 #include <regex.h>
51 #include <stdio.h>
52 #include <stdlib.h>
53 #include <string.h>
54 #include <unistd.h>
55
56 #include "ctags.h"
57
58 /*
59  * ctags: create a tags file
60  */
61
62 NODE    *head;                  /* head of the sorted binary tree */
63
64                                 /* boolean "func" (see init()) */
65 bool    _wht[256], _etk[256], _itk[256], _btk[256], _gd[256];
66
67 FILE    *inf;                   /* ioptr for current input file */
68 FILE    *outf;                  /* ioptr for tags file */
69
70 long    lineftell;              /* ftell after getc( inf ) == '\n' */
71
72 int     lineno;                 /* line number of current line */
73 int     dflag;                  /* -d: non-macro defines */
74 int     tflag;                  /* -t: create tags for typedefs */
75 int     vflag;                  /* -v: vgrind style index output */
76 int     wflag;                  /* -w: suppress warnings */
77 int     xflag;                  /* -x: cxref style output */
78
79 char    *curfile;               /* current input file name */
80 char    searchar = '/';         /* use /.../ searches by default */
81 char    lbuf[LINE_MAX];
82
83 void    init(void);
84 void    find_entries(char *);
85 static void usage(void);
86
87 int
88 main(int argc, char **argv)
89 {
90         static const char       *outfile = "tags";      /* output file */
91         int     aflag;                          /* -a: append to tags */
92         int     uflag;                          /* -u: update tags */
93         int     exit_val;                       /* exit value */
94         int     step;                           /* step through args */
95         int     ch;                             /* getopts char */
96
97         setlocale(LC_ALL, "");
98
99         aflag = uflag = NO;
100         tflag = YES;
101         while ((ch = getopt(argc, argv, "BFTadf:tuwvx")) != -1)
102                 switch(ch) {
103                 case 'B':
104                         searchar = '?';
105                         break;
106                 case 'F':
107                         searchar = '/';
108                         break;
109                 case 'T':
110                         tflag = NO;
111                         break;
112                 case 'a':
113                         aflag++;
114                         break;
115                 case 'd':
116                         dflag++;
117                         break;
118                 case 'f':
119                         outfile = optarg;
120                         break;
121                 case 't':
122                         tflag = YES;
123                         break;
124                 case 'u':
125                         uflag++;
126                         break;
127                 case 'w':
128                         wflag++;
129                         break;
130                 case 'v':
131                         vflag++;
132                 case 'x':
133                         xflag++;
134                         break;
135                 case '?':
136                 default:
137                         usage();
138                 }
139         argv += optind;
140         argc -= optind;
141         if (!argc)
142                 usage();
143
144         if (!xflag)
145                 setlocale(LC_COLLATE, "C");
146
147         init();
148
149         for (exit_val = step = 0; step < argc; ++step)
150                 if (!(inf = fopen(argv[step], "r"))) {
151                         warn("%s", argv[step]);
152                         exit_val = 1;
153                 }
154                 else {
155                         curfile = argv[step];
156                         find_entries(argv[step]);
157                         (void)fclose(inf);
158                 }
159
160         if (head) {
161                 if (xflag)
162                         put_entries(head);
163                 else {
164                         if (uflag) {
165                                 FILE *oldf;
166                                 regex_t *regx;
167
168                                 if ((oldf = fopen(outfile, "r")) == NULL)
169                                         err(1, "opening %s", outfile);
170                                 if (unlink(outfile))
171                                         err(1, "unlinking %s", outfile);
172                                 if ((outf = fopen(outfile, "w")) == NULL)
173                                         err(1, "recreating %s", outfile);
174                                 if ((regx = calloc(argc, sizeof(regex_t))) == NULL)
175                                         err(1, "RE alloc");
176                                 for (step = 0; step < argc; step++) {
177                                         (void)strcpy(lbuf, "\t");
178                                         (void)strlcat(lbuf, argv[step], LINE_MAX);
179                                         (void)strlcat(lbuf, "\t", LINE_MAX);
180                                         if (regcomp(regx + step, lbuf,
181                                             REG_NOSPEC))
182                                                 warn("RE compilation failed");
183                                 }
184 nextline:
185                                 while (fgets(lbuf, LINE_MAX, oldf)) {
186                                         for (step = 0; step < argc; step++)
187                                                 if (regexec(regx + step,
188                                                     lbuf, 0, NULL, 0) == 0)
189                                                         goto nextline;
190                                         fputs(lbuf, outf);
191                                 }
192                                 for (step = 0; step < argc; step++)
193                                         regfree(regx + step);
194                                 free(regx);
195                                 fclose(oldf);
196                                 fclose(outf);
197                                 ++aflag;
198                         }
199                         if (!(outf = fopen(outfile, aflag ? "a" : "w")))
200                                 err(1, "%s", outfile);
201                         put_entries(head);
202                         (void)fclose(outf);
203                         if (uflag) {
204                                 pid_t pid;
205
206                                 if ((pid = fork()) == -1)
207                                         err(1, "fork failed");
208                                 else if (pid == 0) {
209                                         execlp("sort", "sort", "-o", outfile,
210                                             outfile, NULL);
211                                         err(1, "exec of sort failed");
212                                 }
213                                 /* Just assume the sort went OK. The old code
214                                    did not do any checks either. */
215                                 (void)wait(NULL);
216                         }
217                 }
218         }
219         exit(exit_val);
220 }
221
222 static void
223 usage(void)
224 {
225         (void)fprintf(stderr, "usage: ctags [-BFTaduwvx] [-f tagsfile] file ...\n");
226         exit(1);
227 }
228
229 /*
230  * init --
231  *      this routine sets up the boolean pseudo-functions which work by
232  *      setting boolean flags dependent upon the corresponding character.
233  *      Every char which is NOT in that string is false with respect to
234  *      the pseudo-function.  Therefore, all of the array "_wht" is NO
235  *      by default and then the elements subscripted by the chars in
236  *      CWHITE are set to YES.  Thus, "_wht" of a char is YES if it is in
237  *      the string CWHITE, else NO.
238  */
239 void
240 init(void)
241 {
242         int             i;
243         const unsigned char     *sp;
244
245         for (i = 0; i < 256; i++) {
246                 _wht[i] = _etk[i] = _itk[i] = _btk[i] = NO;
247                 _gd[i] = YES;
248         }
249 #define CWHITE  " \f\t\n"
250         for (sp = CWHITE; *sp; sp++)    /* white space chars */
251                 _wht[*sp] = YES;
252 #define CTOKEN  " \t\n\"'#()[]{}=-+%*/&|^~!<>;,.:?"
253         for (sp = CTOKEN; *sp; sp++)    /* token ending chars */
254                 _etk[*sp] = YES;
255 #define CINTOK  "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz0123456789"
256         for (sp = CINTOK; *sp; sp++)    /* valid in-token chars */
257                 _itk[*sp] = YES;
258 #define CBEGIN  "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz"
259         for (sp = CBEGIN; *sp; sp++)    /* token starting chars */
260                 _btk[*sp] = YES;
261 #define CNOTGD  ",;"
262         for (sp = CNOTGD; *sp; sp++)    /* invalid after-function chars */
263                 _gd[*sp] = NO;
264 }
265
266 /*
267  * find_entries --
268  *      this routine opens the specified file and calls the function
269  *      which searches the file.
270  */
271 void
272 find_entries(char *file)
273 {
274         char    *cp;
275
276         lineno = 0;                             /* should be 1 ?? KB */
277         if ((cp = strrchr(file, '.'))) {
278                 if (cp[1] == 'l' && !cp[2]) {
279                         int     c;
280
281                         for (;;) {
282                                 if (GETC(==, EOF))
283                                         return;
284                                 if (!iswhite(c)) {
285                                         rewind(inf);
286                                         break;
287                                 }
288                         }
289 #define LISPCHR ";(["
290 /* lisp */              if (strchr(LISPCHR, c)) {
291                                 l_entries();
292                                 return;
293                         }
294 /* lex */               else {
295                                 /*
296                                  * we search all 3 parts of a lex file
297                                  * for C references.  This may be wrong.
298                                  */
299                                 toss_yysec();
300                                 (void)strcpy(lbuf, "%%$");
301                                 pfnote("yylex", lineno);
302                                 rewind(inf);
303                         }
304                 }
305 /* yacc */      else if (cp[1] == 'y' && !cp[2]) {
306                         /*
307                          * we search only the 3rd part of a yacc file
308                          * for C references.  This may be wrong.
309                          */
310                         toss_yysec();
311                         (void)strcpy(lbuf, "%%$");
312                         pfnote("yyparse", lineno);
313                         y_entries();
314                 }
315 /* fortran */   else if ((cp[1] != 'c' && cp[1] != 'h') && !cp[2]) {
316                         if (PF_funcs())
317                                 return;
318                         rewind(inf);
319                 }
320         }
321 /* C */ c_entries();
322 }