usr.bin/ctags/fortran.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1987, 1993, 1994
   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 0
  33 #ifndef lint
  34 static char sccsid[] = "@(#)fortran.c   8.3 (Berkeley) 4/2/94";
  35 #endif
  36 #endif
  37
  38 #include <sys/cdefs.h>
  39 __FBSDID("$FreeBSD$");
  40
  41 #include <ctype.h>
  42 #include <limits.h>
  43 #include <stdio.h>
  44 #include <string.h>
  45
  46 #include "ctags.h"
  47
  48 static void takeprec(void);
  49
  50 char *lbp;                              /* line buffer pointer */
  51
  52 int
  53 PF_funcs(void)
  54 {
  55         bool    pfcnt;                  /* pascal/fortran functions found */
  56         char    *cp;
  57         char    tok[MAXTOKEN];
  58
  59         for (pfcnt = NO;;) {
  60                 lineftell = ftell(inf);
  61                 if (!fgets(lbuf, sizeof(lbuf), inf))
  62                         return (pfcnt);
  63                 ++lineno;
  64                 lbp = lbuf;
  65                 if (*lbp == '%')        /* Ratfor escape to fortran */
  66                         ++lbp;
  67                 for (; isspace(*lbp); ++lbp)
  68                         continue;
  69                 if (!*lbp)
  70                         continue;
  71                 switch (*lbp | ' ') {   /* convert to lower-case */
  72                 case 'c':
  73                         if (cicmp("complex") || cicmp("character"))
  74                                 takeprec();
  75                         break;
  76                 case 'd':
  77                         if (cicmp("double")) {
  78                                 for (; isspace(*lbp); ++lbp)
  79                                         continue;
  80                                 if (!*lbp)
  81                                         continue;
  82                                 if (cicmp("precision"))
  83                                         break;
  84                                 continue;
  85                         }
  86                         break;
  87                 case 'i':
  88                         if (cicmp("integer"))
  89                                 takeprec();
  90                         break;
  91                 case 'l':
  92                         if (cicmp("logical"))
  93                                 takeprec();
  94                         break;
  95                 case 'r':
  96                         if (cicmp("real"))
  97                                 takeprec();
  98                         break;
  99                 }
 100                 for (; isspace(*lbp); ++lbp)
 101                         continue;
 102                 if (!*lbp)
 103                         continue;
 104                 switch (*lbp | ' ') {
 105                 case 'f':
 106                         if (cicmp("function"))
 107                                 break;
 108                         continue;
 109                 case 'p':
 110                         if (cicmp("program") || cicmp("procedure"))
 111                                 break;
 112                         continue;
 113                 case 's':
 114                         if (cicmp("subroutine"))
 115                                 break;
 116                 default:
 117                         continue;
 118                 }
 119                 for (; isspace(*lbp); ++lbp)
 120                         continue;
 121                 if (!*lbp)
 122                         continue;
 123                 for (cp = lbp + 1; *cp && intoken(*cp); ++cp)
 124                         continue;
 125                 if (cp == lbp + 1)
 126                         continue;
 127                 *cp = EOS;
 128                 (void)strlcpy(tok, lbp, sizeof(tok));   /* possible trunc */
 129                 get_line();                     /* process line for ex(1) */
 130                 pfnote(tok, lineno);
 131                 pfcnt = YES;
 132         }
 133         /*NOTREACHED*/
 134 }
 135
 136 /*
 137  * cicmp --
 138  *      do case-independent strcmp
 139  */
 140 int
 141 cicmp(const char *cp)
 142 {
 143         int     len;
 144         char    *bp;
 145
 146         for (len = 0, bp = lbp; *cp && (*cp &~ ' ') == (*bp++ &~ ' ');
 147             ++cp, ++len)
 148                 continue;
 149         if (!*cp) {
 150                 lbp += len;
 151                 return (YES);
 152         }
 153         return (NO);
 154 }
 155
 156 static void
 157 takeprec(void)
 158 {
 159         for (; isspace(*lbp); ++lbp)
 160                 continue;
 161         if (*lbp == '*') {
 162                 for (++lbp; isspace(*lbp); ++lbp)
 163                         continue;
 164                 if (!isdigit(*lbp))
 165                         --lbp;                  /* force failure */
 166                 else
 167                         while (isdigit(*++lbp))
 168                                 continue;
 169         }
 170 }