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 typedef struct location_s
  25 {
  26   int first_line;
  27   int first_column;
  28   int last_line;
  29   int last_column;
  30 }  location_t;
  31 #define YYLTYPE location_t
  32
  33 /* Initialize LOC. */
  34 # define LOCATION_RESET(Loc)                  \
  35   (Loc).first_column = (Loc).first_line = 1;  \
  36   (Loc).last_column =  (Loc).last_line = 1;
  37
  38 /* Advance of NUM columns. */
  39 # define LOCATION_COLUMNS(Loc, Num)           \
  40   (Loc).last_column += Num;
  41
  42 /* Advance of NUM lines. */
  43 # define LOCATION_LINES(Loc, Num)             \
  44   (Loc).last_column = 1;                      \
  45   (Loc).last_line += Num;
  46
  47 /* Restart: move the first cursor to the last position. */
  48 # define LOCATION_STEP(Loc)                   \
  49   (Loc).first_column = (Loc).last_column;     \
  50   (Loc).first_line = (Loc).last_line;
  51
  52 /* Output LOC on the stream OUT. */
  53 # define LOCATION_PRINT(Out, Loc)                               \
  54   fprintf (stderr, "%s:", infile);                              \
  55   if ((Loc).first_line != (Loc).last_line)                      \
  56     fprintf (Out, "%d.%d-%d.%d",                                \
  57              (Loc).first_line, (Loc).first_column,              \
  58              (Loc).last_line, (Loc).last_column - 1);           \
  59   else if ((Loc).first_column < (Loc).last_column - 1)          \
  60     fprintf (Out, "%d.%d-%d", (Loc).first_line,                 \
  61              (Loc).first_column, (Loc).last_column - 1);        \
  62   else                                                          \
  63     fprintf (Out, "%d.%d", (Loc).first_line, (Loc).first_column)
  64
  65
  66 extern location_t empty_location;
  67 #endif /* !LOCATION_H_ */