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. 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: head/usr.bin/ctags/fortran.c 299355 2016-05-10 11:11:23Z bapt $
  31  */
  32
  33 #include <ctype.h>
  34 #include <limits.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37
  38 #include "ctags.h"
  39
  40 static void takeprec(void);
  41
  42 char *lbp;                              /* line buffer pointer */
  43
  44 int
  45 PF_funcs(void)
  46 {
  47         bool    pfcnt;                  /* pascal/fortran functions found */
  48         char    *cp;
  49         char    tok[MAXTOKEN];
  50
  51         for (pfcnt = NO;;) {
  52                 lineftell = ftell(inf);
  53                 if (!fgets(lbuf, sizeof(lbuf), inf))
  54                         return (pfcnt);
  55                 ++lineno;
  56                 lbp = lbuf;
  57                 if (*lbp == '%')        /* Ratfor escape to fortran */
  58                         ++lbp;
  59                 for (; isspace(*lbp); ++lbp)
  60                         continue;
  61                 if (!*lbp)
  62                         continue;
  63                 switch (*lbp | ' ') {   /* convert to lower-case */
  64                 case 'c':
  65                         if (cicmp("complex") || cicmp("character"))
  66                                 takeprec();
  67                         break;
  68                 case 'd':
  69                         if (cicmp("double")) {
  70                                 for (; isspace(*lbp); ++lbp)
  71                                         continue;
  72                                 if (!*lbp)
  73                                         continue;
  74                                 if (cicmp("precision"))
  75                                         break;
  76                                 continue;
  77                         }
  78                         break;
  79                 case 'i':
  80                         if (cicmp("integer"))
  81                                 takeprec();
  82                         break;
  83                 case 'l':
  84                         if (cicmp("logical"))
  85                                 takeprec();
  86                         break;
  87                 case 'r':
  88                         if (cicmp("real"))
  89                                 takeprec();
  90                         break;
  91                 }
  92                 for (; isspace(*lbp); ++lbp)
  93                         continue;
  94                 if (!*lbp)
  95                         continue;
  96                 switch (*lbp | ' ') {
  97                 case 'f':
  98                         if (cicmp("function"))
  99                                 break;
 100                         continue;
 101                 case 'p':
 102                         if (cicmp("program") || cicmp("procedure"))
 103                                 break;
 104                         continue;
 105                 case 's':
 106                         if (cicmp("subroutine"))
 107                                 break;
 108                 default:
 109                         continue;
 110                 }
 111                 for (; isspace(*lbp); ++lbp)
 112                         continue;
 113                 if (!*lbp)
 114                         continue;
 115                 for (cp = lbp + 1; *cp && intoken(*cp); ++cp)
 116                         continue;
 117                 if (cp == lbp + 1)
 118                         continue;
 119                 *cp = EOS;
 120                 strlcpy(tok, lbp, sizeof(tok)); /* possible trunc */
 121                 get_line();                     /* process line for ex(1) */
 122                 pfnote(tok, lineno);
 123                 pfcnt = YES;
 124         }
 125         /*NOTREACHED*/
 126 }
 127
 128 /*
 129  * cicmp --
 130  *      do case-independent strcmp
 131  */
 132 int
 133 cicmp(const char *cp)
 134 {
 135         int     len;
 136         char    *bp;
 137
 138         for (len = 0, bp = lbp; *cp && (*cp &~ ' ') == (*bp++ &~ ' ');
 139             ++cp, ++len)
 140                 continue;
 141         if (!*cp) {
 142                 lbp += len;
 143                 return (YES);
 144         }
 145         return (NO);
 146 }
 147
 148 static void
 149 takeprec(void)
 150 {
 151         for (; isspace(*lbp); ++lbp)
 152                 continue;
 153         if (*lbp == '*') {
 154                 for (++lbp; isspace(*lbp); ++lbp)
 155                         continue;
 156                 if (!isdigit(*lbp))
 157                         --lbp;                  /* force failure */
 158                 else
 159                         while (isdigit(*++lbp))
 160                                 continue;
 161         }
 162 }