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  * @(#)fortran.c        8.3 (Berkeley) 4/2/94
  34  * $FreeBSD: src/usr.bin/ctags/fortran.c,v 1.3.6.2 2002/07/30 00:55:07 tjr Exp $
  35  * $DragonFly: src/usr.bin/ctags/fortran.c,v 1.3 2003/10/02 17:42:27 hmp Exp $
  36  */
  37
  38 #include <ctype.h>
  39 #include <limits.h>
  40 #include <stdio.h>
  41 #include <string.h>
  42
  43 #include "ctags.h"
  44
  45 static void takeprec(void);
  46
  47 char *lbp;                              /* line buffer pointer */
  48
  49 int
  50 PF_funcs(void)
  51 {
  52         bool    pfcnt;                  /* pascal/fortran functions found */
  53         char    *cp;
  54         char    tok[MAXTOKEN];
  55
  56         for (pfcnt = NO;;) {
  57                 lineftell = ftell(inf);
  58                 if (!fgets(lbuf, sizeof(lbuf), inf))
  59                         return (pfcnt);
  60                 ++lineno;
  61                 lbp = lbuf;
  62                 if (*lbp == '%')        /* Ratfor escape to fortran */
  63                         ++lbp;
  64                 for (; isspace(*lbp); ++lbp)
  65                         continue;
  66                 if (!*lbp)
  67                         continue;
  68                 switch (*lbp | ' ') {   /* convert to lower-case */
  69                 case 'c':
  70                         if (cicmp("complex") || cicmp("character"))
  71                                 takeprec();
  72                         break;
  73                 case 'd':
  74                         if (cicmp("double")) {
  75                                 for (; isspace(*lbp); ++lbp)
  76                                         continue;
  77                                 if (!*lbp)
  78                                         continue;
  79                                 if (cicmp("precision"))
  80                                         break;
  81                                 continue;
  82                         }
  83                         break;
  84                 case 'i':
  85                         if (cicmp("integer"))
  86                                 takeprec();
  87                         break;
  88                 case 'l':
  89                         if (cicmp("logical"))
  90                                 takeprec();
  91                         break;
  92                 case 'r':
  93                         if (cicmp("real"))
  94                                 takeprec();
  95                         break;
  96                 }
  97                 for (; isspace(*lbp); ++lbp)
  98                         continue;
  99                 if (!*lbp)
 100                         continue;
 101                 switch (*lbp | ' ') {
 102                 case 'f':
 103                         if (cicmp("function"))
 104                                 break;
 105                         continue;
 106                 case 'p':
 107                         if (cicmp("program") || cicmp("procedure"))
 108                                 break;
 109                         continue;
 110                 case 's':
 111                         if (cicmp("subroutine"))
 112                                 break;
 113                 default:
 114                         continue;
 115                 }
 116                 for (; isspace(*lbp); ++lbp)
 117                         continue;
 118                 if (!*lbp)
 119                         continue;
 120                 for (cp = lbp + 1; *cp && intoken(*cp); ++cp)
 121                         continue;
 122                 if ((cp = lbp + 1))
 123                         continue;
 124                 *cp = EOS;
 125                 (void)strlcpy(tok, lbp, sizeof(tok));   /* possible trunc */
 126                 getline();                      /* process line for ex(1) */
 127                 pfnote(tok, lineno);
 128                 pfcnt = YES;
 129         }
 130         /*NOTREACHED*/
 131 }
 132
 133 /*
 134  * cicmp --
 135  *      do case-independent strcmp
 136  */
 137 int
 138 cicmp(const char *cp)
 139 {
 140         int     len;
 141         char    *bp;
 142
 143         for (len = 0, bp = lbp; *cp && (*cp &~ ' ') == (*bp++ &~ ' ');
 144             ++cp, ++len)
 145                 continue;
 146         if (!*cp) {
 147                 lbp += len;
 148                 return (YES);
 149         }
 150         return (NO);
 151 }
 152
 153 static void
 154 takeprec(void)
 155 {
 156         for (; isspace(*lbp); ++lbp)
 157                 continue;
 158         if (*lbp == '*') {
 159                 for (++lbp; isspace(*lbp); ++lbp)
 160                         continue;
 161                 if (!isdigit(*lbp))
 162                         --lbp;                  /* force failure */
 163                 else
 164                         while (isdigit(*++lbp))
 165                                 continue;
 166         }
 167 }