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  * @(#)fortran.c        8.3 (Berkeley) 4/2/94
  30  * $FreeBSD: src/usr.bin/ctags/fortran.c,v 1.3.6.2 2002/07/30 00:55:07 tjr Exp $
  31  * $DragonFly: src/usr.bin/ctags/fortran.c,v 1.3 2003/10/02 17:42:27 hmp Exp $
  32  */
  33
  34 #include <ctype.h>
  35 #include <limits.h>
  36 #include <stdio.h>
  37 #include <string.h>
  38
  39 #include "ctags.h"
  40
  41 static void takeprec(void);
  42
  43 char *lbp;                              /* line buffer pointer */
  44
  45 int
  46 PF_funcs(void)
  47 {
  48         bool    pfcnt;                  /* pascal/fortran functions found */
  49         char    *cp;
  50         char    tok[MAXTOKEN];
  51
  52         for (pfcnt = NO;;) {
  53                 lineftell = ftell(inf);
  54                 if (!fgets(lbuf, sizeof(lbuf), inf))
  55                         return (pfcnt);
  56                 ++lineno;
  57                 lbp = lbuf;
  58                 if (*lbp == '%')        /* Ratfor escape to fortran */
  59                         ++lbp;
  60                 for (; isspace(*lbp); ++lbp)
  61                         continue;
  62                 if (!*lbp)
  63                         continue;
  64                 switch (*lbp | ' ') {   /* convert to lower-case */
  65                 case 'c':
  66                         if (cicmp("complex") || cicmp("character"))
  67                                 takeprec();
  68                         break;
  69                 case 'd':
  70                         if (cicmp("double")) {
  71                                 for (; isspace(*lbp); ++lbp)
  72                                         continue;
  73                                 if (!*lbp)
  74                                         continue;
  75                                 if (cicmp("precision"))
  76                                         break;
  77                                 continue;
  78                         }
  79                         break;
  80                 case 'i':
  81                         if (cicmp("integer"))
  82                                 takeprec();
  83                         break;
  84                 case 'l':
  85                         if (cicmp("logical"))
  86                                 takeprec();
  87                         break;
  88                 case 'r':
  89                         if (cicmp("real"))
  90                                 takeprec();
  91                         break;
  92                 }
  93                 for (; isspace(*lbp); ++lbp)
  94                         continue;
  95                 if (!*lbp)
  96                         continue;
  97                 switch (*lbp | ' ') {
  98                 case 'f':
  99                         if (cicmp("function"))
 100                                 break;
 101                         continue;
 102                 case 'p':
 103                         if (cicmp("program") || cicmp("procedure"))
 104                                 break;
 105                         continue;
 106                 case 's':
 107                         if (cicmp("subroutine"))
 108                                 break;
 109                 default:
 110                         continue;
 111                 }
 112                 for (; isspace(*lbp); ++lbp)
 113                         continue;
 114                 if (!*lbp)
 115                         continue;
 116                 for (cp = lbp + 1; *cp && intoken(*cp); ++cp)
 117                         continue;
 118                 if ((cp = lbp + 1))
 119                         continue;
 120                 *cp = EOS;
 121                 (void)strlcpy(tok, lbp, sizeof(tok));   /* possible trunc */
 122                 getline();                      /* process line for ex(1) */
 123                 pfnote(tok, lineno);
 124                 pfcnt = YES;
 125         }
 126         /*NOTREACHED*/
 127 }
 128
 129 /*
 130  * cicmp --
 131  *      do case-independent strcmp
 132  */
 133 int
 134 cicmp(const char *cp)
 135 {
 136         int     len;
 137         char    *bp;
 138
 139         for (len = 0, bp = lbp; *cp && (*cp &~ ' ') == (*bp++ &~ ' ');
 140             ++cp, ++len)
 141                 continue;
 142         if (!*cp) {
 143                 lbp += len;
 144                 return (YES);
 145         }
 146         return (NO);
 147 }
 148
 149 static void
 150 takeprec(void)
 151 {
 152         for (; isspace(*lbp); ++lbp)
 153                 continue;
 154         if (*lbp == '*') {
 155                 for (++lbp; isspace(*lbp); ++lbp)
 156                         continue;
 157                 if (!isdigit(*lbp))
 158                         --lbp;                  /* force failure */
 159                 else
 160                         while (isdigit(*++lbp))
 161                                 continue;
 162         }
 163 }