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