gnu/dist/bc/dc/dc.h

   1 /*
   2  * Header file for dc routines
   3  *
   4  * Copyright (C) 1994, 1997, 1998 Free Software Foundation, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, you can either send email to this
  18  * program's author (see below) or write to:
  19  *
  20  *    The Free Software Foundation, Inc.
  21  *    59 Temple Place, Suite 330
  22  *    Boston, MA 02111 USA
  23  */
  24
  25 #ifndef DC_DEFS_H
  26 #define DC_DEFS_H
  27
  28 /* 'I' is a command, and bases 17 and 18 are quite
  29  * unusual, so we limit ourselves to bases 2 to 16
  30  */
  31 #define DC_IBASE_MAX    16
  32
  33 #define DC_SUCCESS              0
  34 #define DC_DOMAIN_ERROR 1
  35 #define DC_FAIL                 2       /* generic failure */
  36
  37
  38 #ifndef __STDC__
  39 # define DC_PROTO(x)                    ()
  40 # define DC_DECLVOID()                  ()
  41 # define DC_DECLARG(arglist)    arglist
  42 # define DC_DECLSEP                             ;
  43 # define DC_DECLEND                             ;
  44 #else /* __STDC__ */
  45 # define DC_PROTO(x)                    x
  46 # define DC_DECLVOID()                  (void)
  47 # define DC_DECLARG(arglist)    (
  48 # define DC_DECLSEP                             ,
  49 # define DC_DECLEND                             )
  50 #endif /* __STDC__ */
  51
  52
  53 typedef enum {DC_TOSS, DC_KEEP}   dc_discard;
  54 typedef enum {DC_NONL, DC_WITHNL} dc_newline;
  55
  56
  57 /* type discriminant for dc_data */
  58 typedef enum {DC_UNINITIALIZED, DC_NUMBER, DC_STRING} dc_value_type;
  59
  60 /* only numeric.c knows what dc_num's *really* look like */
  61 typedef struct dc_number *dc_num;
  62
  63 /* only string.c knows what dc_str's *really* look like */
  64 typedef struct dc_string *dc_str;
  65
  66
  67 /* except for the two implementation-specific modules, all
  68  * dc functions only know of this one generic type of object
  69  */
  70 typedef struct {
  71         dc_value_type dc_type;  /* discriminant for union */
  72         union {
  73                 dc_num number;
  74                 dc_str string;
  75         } v;
  76 } dc_data;
  77
  78
  79 /* This is dc's only global variable: */
  80 extern const char *progname;    /* basename of program invocation */
  81
  82 #endif /* not DC_DEFS_H */