usr.bin/ctags/fortran.c

   1 /*
   2  * Copyright (c) 1987, 1993, 1994
   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  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #if 0
  35 #ifndef lint
  36 static char sccsid[] = "@(#)fortran.c   8.3 (Berkeley) 4/2/94";
  37 #endif
  38 #endif
  39
  40 #include <sys/cdefs.h>
  41 __FBSDID("$FreeBSD: src/usr.bin/ctags/fortran.c,v 1.3.6.2 2002/07/30 00:55:07 tjr Exp $");
  42
  43 #include <ctype.h>
  44 #include <limits.h>
  45 #include <stdio.h>
  46 #include <string.h>
  47
  48 #include "ctags.h"
  49
  50 static void takeprec(void);
  51
  52 char *lbp;                              /* line buffer pointer */
  53
  54 int
  55 PF_funcs()
  56 {
  57         bool    pfcnt;                  /* pascal/fortran functions found */
  58         char    *cp;
  59         char    tok[MAXTOKEN];
  60
  61         for (pfcnt = NO;;) {
  62                 lineftell = ftell(inf);
  63                 if (!fgets(lbuf, sizeof(lbuf), inf))
  64                         return (pfcnt);
  65                 ++lineno;
  66                 lbp = lbuf;
  67                 if (*lbp == '%')        /* Ratfor escape to fortran */
  68                         ++lbp;
  69                 for (; isspace(*lbp); ++lbp)
  70                         continue;
  71                 if (!*lbp)
  72                         continue;
  73                 switch (*lbp | ' ') {   /* convert to lower-case */
  74                 case 'c':
  75                         if (cicmp("complex") || cicmp("character"))
  76                                 takeprec();
  77                         break;
  78                 case 'd':
  79                         if (cicmp("double")) {
  80                                 for (; isspace(*lbp); ++lbp)
  81                                         continue;
  82                                 if (!*lbp)
  83                                         continue;
  84                                 if (cicmp("precision"))
  85                                         break;
  86                                 continue;
  87                         }
  88                         break;
  89                 case 'i':
  90                         if (cicmp("integer"))
  91                                 takeprec();
  92                         break;
  93                 case 'l':
  94                         if (cicmp("logical"))
  95                                 takeprec();
  96                         break;
  97                 case 'r':
  98                         if (cicmp("real"))
  99                                 takeprec();
 100                         break;
 101                 }
 102                 for (; isspace(*lbp); ++lbp)
 103                         continue;
 104                 if (!*lbp)
 105                         continue;
 106                 switch (*lbp | ' ') {
 107                 case 'f':
 108                         if (cicmp("function"))
 109                                 break;
 110                         continue;
 111                 case 'p':
 112                         if (cicmp("program") || cicmp("procedure"))
 113                                 break;
 114                         continue;
 115                 case 's':
 116                         if (cicmp("subroutine"))
 117                                 break;
 118                 default:
 119                         continue;
 120                 }
 121                 for (; isspace(*lbp); ++lbp)
 122                         continue;
 123                 if (!*lbp)
 124                         continue;
 125                 for (cp = lbp + 1; *cp && intoken(*cp); ++cp)
 126                         continue;
 127                 if ((cp = lbp + 1))
 128                         continue;
 129                 *cp = EOS;
 130                 (void)strlcpy(tok, lbp, sizeof(tok));   /* possible trunc */
 131                 getline();                      /* process line for ex(1) */
 132                 pfnote(tok, lineno);
 133                 pfcnt = YES;
 134         }
 135         /*NOTREACHED*/
 136 }
 137
 138 /*
 139  * cicmp --
 140  *      do case-independent strcmp
 141  */
 142 int
 143 cicmp(const char *cp)
 144 {
 145         int     len;
 146         char    *bp;
 147
 148         for (len = 0, bp = lbp; *cp && (*cp &~ ' ') == (*bp++ &~ ' ');
 149             ++cp, ++len)
 150                 continue;
 151         if (!*cp) {
 152                 lbp += len;
 153                 return (YES);
 154         }
 155         return (NO);
 156 }
 157
 158 static void
 159 takeprec(void)
 160 {
 161         for (; isspace(*lbp); ++lbp)
 162                 continue;
 163         if (*lbp == '*') {
 164                 for (++lbp; isspace(*lbp); ++lbp)
 165                         continue;
 166                 if (!isdigit(*lbp))
 167                         --lbp;                  /* force failure */
 168                 else
 169                         while (isdigit(*++lbp))
 170                                 continue;
 171         }
 172 }