soltools/mkdepend/ifparser.h

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