soltools/mkdepend/ifparser.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * $XConsortium: ifparser.h,v 1.1 92/08/22 13:05:39 rws Exp $
   4  *
   5  * Copyright 1992 Network Computing Devices, Inc.
   6  *
   7  * Permission to use, copy, modify, and distribute this software and its
   8  * documentation for any purpose and without fee is hereby granted, provided
   9  * that the above copyright notice appear in all copies and that both that
  10  * copyright notice and this permission notice appear in supporting
  11  * documentation, and that the name of Network Computing Devices may not be
  12  * used in advertising or publicity pertaining to distribution of the software
  13  * without specific, written prior permission.  Network Computing Devices makes
  14  * no representations about the suitability of this software for any purpose.
  15  * It is provided ``as is'' without express or implied warranty.
  16  *
  17  * NETWORK COMPUTING DEVICES DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
  18  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
  19  * IN NO EVENT SHALL NETWORK COMPUTING DEVICES BE LIABLE FOR ANY SPECIAL,
  20  * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  21  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  22  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  23  * PERFORMANCE OF THIS SOFTWARE.
  24  *
  25  * Author:  Jim Fulton
  26  *          Network Computing Devices, Inc.
  27  *
  28  * Simple if statement processor
  29  *
  30  * This module can be used to evaluate string representations of C language
  31  * if constructs.  It accepts the following grammar:
  32  *
  33  *     EXPRESSION   :=  VALUE
  34  *           |  VALUE  BINOP    EXPRESSION
  35  *
  36  *     VALUE        :=  '('  EXPRESSION  ')'
  37  *           |  '!'  VALUE
  38  *           |  '-'  VALUE
  39  *           |  'defined'  '('  variable  ')'
  40  *           |  variable
  41  *           |  number
  42  *
  43  *     BINOP        :=  '*' |  '/'  |  '%'
  44  *           |  '+' |  '-'
  45  *           |  '<<'    |  '>>'
  46  *           |  '<' |  '>'  |  '<='  |  '>='
  47  *           |  '=='    |  '!='
  48  *           |  '&' |  '|'
  49  *           |  '&&'    |  '||'
  50  *
  51  * The normal C order of precidence is supported.
  52  *
  53  *
  54  * External Entry Points:
  55  *
  56  *     ParseIfExpression        parse a string for #if
  57  */
  58
  59 #include <stdio.h>
  60
  61 typedef int Bool;
  62 #define False 0
  63 #define True 1
  64
  65 typedef struct _if_parser {
  66     struct {                /* functions */
  67       const char *(*handle_error)  (struct _if_parser *, const char *, const char *);
  68       int         (*eval_variable) (struct _if_parser *, const char *, size_t);
  69       int         (*eval_defined)  (struct _if_parser *, const char *, size_t);
  70     } funcs;
  71     char *data;
  72 } IfParser;
  73
  74 const char *ParseIfExpression (IfParser *, const char *, int *);
  75
  76 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */