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 # include "quotearg.h"
  24
  25 typedef struct location_s
  26 {
  27   const char *file;
  28   int first_line;
  29   int first_column;
  30   int last_line;
  31   int last_column;
  32 }  location_t;
  33 #define YYLTYPE location_t
  34
  35 /* Initialize LOC. */
  36 # define LOCATION_RESET(Loc)                    \
  37 do {                                            \
  38   (Loc).file = NULL;                            \
  39   (Loc).first_column = (Loc).first_line = 1;    \
  40   (Loc).last_column =  (Loc).last_line = 1;     \
  41 } while (0)
  42
  43
  44 /* Restart: move the first cursor to the last position. */
  45 # define LOCATION_STEP(Loc)                     \
  46 do {                                            \
  47   (Loc).first_column = (Loc).last_column;       \
  48   (Loc).first_line = (Loc).last_line;           \
  49 } while (0)
  50
  51
  52 /* Output LOC on the stream OUT.
  53    Warning: it uses quotearg's slot 3.  */
  54 # define LOCATION_PRINT(Out, Loc)                                       \
  55 do {                                                                    \
  56   fprintf (stderr, "%s:", quotearg_n_style (3, escape_quoting_style,    \
  57                                             (Loc).file));               \
  58   if ((Loc).first_line)                                                 \
  59     {                                                                   \
  60       if ((Loc).first_line != (Loc).last_line)                          \
  61         fprintf (Out, "%d.%d-%d.%d",                                    \
  62                  (Loc).first_line, (Loc).first_column,                  \
  63                  (Loc).last_line, (Loc).last_column - 1);               \
  64       else if ((Loc).first_column < (Loc).last_column - 1)              \
  65         fprintf (Out, "%d.%d-%d", (Loc).first_line,                     \
  66                  (Loc).first_column, (Loc).last_column - 1);            \
  67       else                                                              \
  68         fprintf (Out, "%d.%d", (Loc).first_line, (Loc).first_column);   \
  69   }                                                                     \
  70 } while (0)
  71
  72
  73 extern location_t empty_location;
  74
  75 #endif /* !LOCATION_H_ */