src/location.h

   1 /* Locations for Bison
   2    Copyright (C) 2002 Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison 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    Bison 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 Bison; see the file COPYING.  If not, write to
  18    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef LOCATION_H_
  22 # define LOCATION_H_
  23
  24 /* A boundary between two characters.  */
  25 typedef struct
  26 {
  27   /* The name of the file that contains the boundary.  */
  28   char const *file;
  29
  30   /* The (origin-1) line that contains the boundary.  */
  31   int line;
  32
  33   /* The (origin-1) column just after the boundary.  This is neither a
  34      byte count, nor a character count; it is a column count.  */
  35   int column;
  36
  37 } boundary;
  38
  39 /* Return nonzero if A and B are equal boundaries.  */
  40 static inline bool
  41 equal_boundaries (boundary a, boundary b)
  42 {
  43   return (a.column == b.column
  44           && a.line == b.line
  45           && a.file == b.file);
  46 }
  47
  48 /* A location, that is, a region of source code.  */
  49 typedef struct
  50 {
  51   /* Boundary just before the location starts.  */
  52   boundary start;
  53
  54   /* Boundary just after the location ends.  */
  55   boundary end;
  56
  57 } location;
  58
  59 #define YYLTYPE location
  60
  61 extern location const empty_location;
  62
  63 void location_print (FILE *, location);
  64
  65 #endif /* ! defined LOCATION_H_ */