usr.bin/ctags/ctags.c

   1 /*      $NetBSD: ctags.c,v 1.11 2005/02/17 17:29:58 xtraeme Exp $       */
   2
   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 #if HAVE_NBTOOL_CONFIG_H
  33 #include "nbtool_config.h"
  34 #endif
  35
  36 #include <sys/cdefs.h>
  37 #if defined(__COPYRIGHT) && !defined(lint)
  38 __COPYRIGHT("@(#) Copyright (c) 1987, 1993, 1994, 1995\
  39  The Regents of the University of California.  All rights reserved.");
  40 #endif /* not lint */
  41
  42 #if defined(__RCSID) && !defined(lint)
  43 #if 0
  44 static char sccsid[] = "@(#)ctags.c     8.4 (Berkeley) 2/7/95";
  45 #endif
  46 __RCSID("$NetBSD: ctags.c,v 1.11 2005/02/17 17:29:58 xtraeme Exp $");
  47 #endif /* not lint */
  48
  49 #include <err.h>
  50 #include <limits.h>
  51 #include <stdio.h>
  52 #include <string.h>
  53 #include <stdlib.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
  86 int
  87 main(int argc, char **argv)
  88 {
  89         static const char       *outfile = "tags";      /* output file */
  90         int     aflag;                          /* -a: append to tags */
  91         int     uflag;                          /* -u: update tags */
  92         int     exit_val;                       /* exit value */
  93         int     step;                           /* step through args */
  94         int     ch;                             /* getopts char */
  95         char    cmd[100];                       /* too ugly to explain */
  96
  97         aflag = uflag = NO;
  98         while ((ch = getopt(argc, argv, "BFadf:tuwvx")) != -1)
  99                 switch(ch) {
 100                 case 'B':
 101                         searchar = '?';
 102                         break;
 103                 case 'F':
 104                         searchar = '/';
 105                         break;
 106                 case 'a':
 107                         aflag++;
 108                         break;
 109                 case 'd':
 110                         dflag++;
 111                         break;
 112                 case 'f':
 113                         outfile = optarg;
 114                         break;
 115                 case 't':
 116                         tflag++;
 117                         break;
 118                 case 'u':
 119                         uflag++;
 120                         break;
 121                 case 'w':
 122                         wflag++;
 123                         break;
 124                 case 'v':
 125                         vflag++;
 126                 case 'x':
 127                         xflag++;
 128                         break;
 129                 case '?':
 130                 default:
 131                         goto usage;
 132                 }
 133         argv += optind;
 134         argc -= optind;
 135         if (!argc) {
 136 usage:          (void)fprintf(stderr,
 137                         "usage: ctags [-BFadtuwvx] [-f tagsfile] file ...\n");
 138                 exit(1);
 139         }
 140
 141         init();
 142
 143         for (exit_val = step = 0; step < argc; ++step)
 144                 if (!(inf = fopen(argv[step], "r"))) {
 145                         warn("%s", argv[step]);
 146                         exit_val = 1;
 147                 }
 148                 else {
 149                         curfile = argv[step];
 150                         find_entries(argv[step]);
 151                         (void)fclose(inf);
 152                 }
 153
 154         if (head) {
 155                 if (xflag)
 156                         put_entries(head);
 157                 else {
 158                         if (uflag) {
 159                                 for (step = 0; step < argc; step++) {
 160                                         (void)snprintf(cmd, sizeof(cmd),
 161                                                 "mv %s OTAGS; fgrep -v '\t%s\t' OTAGS >%s; rm OTAGS",
 162                                                         outfile, argv[step],
 163                                                         outfile);
 164                                         system(cmd);
 165                                 }
 166                                 ++aflag;
 167                         }
 168                         if (!(outf = fopen(outfile, aflag ? "a" : "w")))
 169                                 err(exit_val, "%s", outfile);
 170                         put_entries(head);
 171                         (void)fclose(outf);
 172                         if (uflag) {
 173                                 (void)snprintf(cmd, sizeof(cmd),
 174                                     "sort -o %s %s", outfile, outfile);
 175                                 system(cmd);
 176                         }
 177                 }
 178         }
 179         exit(exit_val);
 180 }
 181
 182 /*
 183  * init --
 184  *      this routine sets up the boolean psuedo-functions which work by
 185  *      setting boolean flags dependent upon the corresponding character.
 186  *      Every char which is NOT in that string is false with respect to
 187  *      the pseudo-function.  Therefore, all of the array "_wht" is NO
 188  *      by default and then the elements subscripted by the chars in
 189  *      CWHITE are set to YES.  Thus, "_wht" of a char is YES if it is in
 190  *      the string CWHITE, else NO.
 191  */
 192 void
 193 init(void)
 194 {
 195         int             i;
 196         unsigned const char     *sp;
 197
 198         for (i = 0; i < 256; i++) {
 199                 _wht[i] = _etk[i] = _itk[i] = _btk[i] = NO;
 200                 _gd[i] = YES;
 201         }
 202 #define CWHITE  " \f\t\n"
 203         for (sp = CWHITE; *sp; sp++)    /* white space chars */
 204                 _wht[*sp] = YES;
 205 #define CTOKEN  " \t\n\"'#()[]{}=-+%*/&|^~!<>;,.:?"
 206         for (sp = CTOKEN; *sp; sp++)    /* token ending chars */
 207                 _etk[*sp] = YES;
 208 #define CINTOK  "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz0123456789"
 209         for (sp = CINTOK; *sp; sp++)    /* valid in-token chars */
 210                 _itk[*sp] = YES;
 211 #define CBEGIN  "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz"
 212         for (sp = CBEGIN; *sp; sp++)    /* token starting chars */
 213                 _btk[*sp] = YES;
 214 #define CNOTGD  ",;"
 215         for (sp = CNOTGD; *sp; sp++)    /* invalid after-function chars */
 216                 _gd[*sp] = NO;
 217 }
 218
 219 /*
 220  * find_entries --
 221  *      this routine opens the specified file and calls the function
 222  *      which searches the file.
 223  */
 224 void
 225 find_entries(char *file)
 226 {
 227         char    *cp;
 228
 229         lineno = 0;                             /* should be 1 ?? KB */
 230         if ((cp = strrchr(file, '.')) != NULL) {
 231                 if (cp[1] == 'l' && !cp[2]) {
 232                         int     c;
 233
 234                         for (;;) {
 235                                 if (GETC(==, EOF))
 236                                         return;
 237                                 if (!iswhite(c)) {
 238                                         rewind(inf);
 239                                         break;
 240                                 }
 241                         }
 242 #define LISPCHR ";(["
 243 /* lisp */              if (strchr(LISPCHR, c)) {
 244                                 l_entries();
 245                                 return;
 246                         }
 247 /* lex */               else {
 248                                 /*
 249                                  * we search all 3 parts of a lex file
 250                                  * for C references.  This may be wrong.
 251                                  */
 252                                 toss_yysec();
 253                                 (void)strlcpy(lbuf, "%%$", sizeof(lbuf));
 254                                 pfnote("yylex", lineno);
 255                                 rewind(inf);
 256                         }
 257                 }
 258 /* yacc */      else if (cp[1] == 'y' && !cp[2]) {
 259                         /*
 260                          * we search only the 3rd part of a yacc file
 261                          * for C references.  This may be wrong.
 262                          */
 263                         toss_yysec();
 264                         (void)strlcpy(lbuf, "%%$", sizeof(lbuf));
 265                         pfnote("yyparse", lineno);
 266                         y_entries();
 267                 }
 268 /* fortran */   else if ((cp[1] != 'c' && cp[1] != 'h') && !cp[2]) {
 269                         if (PF_funcs())
 270                                 return;
 271                         rewind(inf);
 272                 }
 273         }
 274 /* C */ c_entries();
 275 }