1 /*
2 * Copyright (c) 1987, 1993, 1994, 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char copyright[] =
10 "@(#) Copyright (c) 1987, 1993, 1994, 1995\n\
11 The Regents of the University of California. All rights reserved.\n";
12 #endif /* not lint */
13
14 #ifndef lint
15 static char sccsid[] = "@(#)ctags.c 8.4 (Berkeley) 02/07/95";
16 #endif /* not lint */
17
18 #include <err.h>
19 #include <limits.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include <stdlib.h>
23 #include <unistd.h>
24
25 #include "ctags.h"
26
27 /*
28 * ctags: create a tags file
29 */
30
31 NODE *head; /* head of the sorted binary tree */
32
33 /* boolean "func" (see init()) */
34 bool _wht[256], _etk[256], _itk[256], _btk[256], _gd[256];
35
36 FILE *inf; /* ioptr for current input file */
37 FILE *outf; /* ioptr for tags file */
38
39 long lineftell; /* ftell after getc( inf ) == '\n' */
40
41 int lineno; /* line number of current line */
42 int dflag; /* -d: non-macro defines */
43 int tflag; /* -t: create tags for typedefs */
44 int vflag; /* -v: vgrind style index output */
45 int wflag; /* -w: suppress warnings */
46 int xflag; /* -x: cxref style output */
47
48 char *curfile; /* current input file name */
49 char searchar = '/'; /* use /.../ searches by default */
50 char lbuf[LINE_MAX];
51
52 void init __P((void));
53 void find_entries __P((char *));
54
55 int
main(argc,argv)56 main(argc, argv)
57 int argc;
58 char **argv;
59 {
60 static char *outfile = "tags"; /* output file */
61 int aflag; /* -a: append to tags */
62 int uflag; /* -u: update tags */
63 int exit_val; /* exit value */
64 int step; /* step through args */
65 int ch; /* getopts char */
66 char cmd[100]; /* too ugly to explain */
67
68 aflag = uflag = NO;
69 while ((ch = getopt(argc, argv, "BFadf:tuwvx")) != EOF)
70 switch(ch) {
71 case 'B':
72 searchar = '?';
73 break;
74 case 'F':
75 searchar = '/';
76 break;
77 case 'a':
78 aflag++;
79 break;
80 case 'd':
81 dflag++;
82 break;
83 case 'f':
84 outfile = optarg;
85 break;
86 case 't':
87 tflag++;
88 break;
89 case 'u':
90 uflag++;
91 break;
92 case 'w':
93 wflag++;
94 break;
95 case 'v':
96 vflag++;
97 case 'x':
98 xflag++;
99 break;
100 case '?':
101 default:
102 goto usage;
103 }
104 argv += optind;
105 argc -= optind;
106 if (!argc) {
107 usage: (void)fprintf(stderr,
108 "usage: ctags [-BFadtuwvx] [-f tagsfile] file ...\n");
109 exit(1);
110 }
111
112 init();
113
114 for (exit_val = step = 0; step < argc; ++step)
115 if (!(inf = fopen(argv[step], "r"))) {
116 warn("%s", argv[step]);
117 exit_val = 1;
118 }
119 else {
120 curfile = argv[step];
121 find_entries(argv[step]);
122 (void)fclose(inf);
123 }
124
125 if (head)
126 if (xflag)
127 put_entries(head);
128 else {
129 if (uflag) {
130 for (step = 0; step < argc; step++) {
131 (void)sprintf(cmd,
132 "mv %s OTAGS; fgrep -v '\t%s\t' OTAGS >%s; rm OTAGS",
133 outfile, argv[step],
134 outfile);
135 system(cmd);
136 }
137 ++aflag;
138 }
139 if (!(outf = fopen(outfile, aflag ? "a" : "w")))
140 err(exit_val, "%s", outfile);
141 put_entries(head);
142 (void)fclose(outf);
143 if (uflag) {
144 (void)sprintf(cmd, "sort -o %s %s",
145 outfile, outfile);
146 system(cmd);
147 }
148 }
149 exit(exit_val);
150 }
151
152 /*
153 * init --
154 * this routine sets up the boolean psuedo-functions which work by
155 * setting boolean flags dependent upon the corresponding character.
156 * Every char which is NOT in that string is false with respect to
157 * the pseudo-function. Therefore, all of the array "_wht" is NO
158 * by default and then the elements subscripted by the chars in
159 * CWHITE are set to YES. Thus, "_wht" of a char is YES if it is in
160 * the string CWHITE, else NO.
161 */
162 void
init()163 init()
164 {
165 int i;
166 unsigned char *sp;
167
168 for (i = 0; i < 256; i++) {
169 _wht[i] = _etk[i] = _itk[i] = _btk[i] = NO;
170 _gd[i] = YES;
171 }
172 #define CWHITE " \f\t\n"
173 for (sp = CWHITE; *sp; sp++) /* white space chars */
174 _wht[*sp] = YES;
175 #define CTOKEN " \t\n\"'#()[]{}=-+%*/&|^~!<>;,.:?"
176 for (sp = CTOKEN; *sp; sp++) /* token ending chars */
177 _etk[*sp] = YES;
178 #define CINTOK "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz0123456789"
179 for (sp = CINTOK; *sp; sp++) /* valid in-token chars */
180 _itk[*sp] = YES;
181 #define CBEGIN "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz"
182 for (sp = CBEGIN; *sp; sp++) /* token starting chars */
183 _btk[*sp] = YES;
184 #define CNOTGD ",;"
185 for (sp = CNOTGD; *sp; sp++) /* invalid after-function chars */
186 _gd[*sp] = NO;
187 }
188
189 /*
190 * find_entries --
191 * this routine opens the specified file and calls the function
192 * which searches the file.
193 */
194 void
find_entries(file)195 find_entries(file)
196 char *file;
197 {
198 char *cp;
199
200 lineno = 0; /* should be 1 ?? KB */
201 if (cp = strrchr(file, '.')) {
202 if (cp[1] == 'l' && !cp[2]) {
203 int c;
204
205 for (;;) {
206 if (GETC(==, EOF))
207 return;
208 if (!iswhite(c)) {
209 rewind(inf);
210 break;
211 }
212 }
213 #define LISPCHR ";(["
214 /* lisp */ if (strchr(LISPCHR, c)) {
215 l_entries();
216 return;
217 }
218 /* lex */ else {
219 /*
220 * we search all 3 parts of a lex file
221 * for C references. This may be wrong.
222 */
223 toss_yysec();
224 (void)strcpy(lbuf, "%%$");
225 pfnote("yylex", lineno);
226 rewind(inf);
227 }
228 }
229 /* yacc */ else if (cp[1] == 'y' && !cp[2]) {
230 /*
231 * we search only the 3rd part of a yacc file
232 * for C references. This may be wrong.
233 */
234 toss_yysec();
235 (void)strcpy(lbuf, "%%$");
236 pfnote("yyparse", lineno);
237 y_entries();
238 }
239 /* fortran */ else if ((cp[1] != 'c' && cp[1] != 'h') && !cp[2]) {
240 if (PF_funcs())
241 return;
242 rewind(inf);
243 }
244 }
245 /* C */ c_entries();
246 }
247