1/* Declarations for variables relating to reading the source file.
2   Used by parsers, lexical analyzers, and error message routines.
3   Copyright (C) 1993, 1997, 1998, 2000, 2003, 2004, 2007, 2008, 2009
4   Free Software Foundation, Inc.
5
6This file is part of GCC.
7
8GCC is free software; you can redistribute it and/or modify it under
9the terms of the GNU General Public License as published by the Free
10Software Foundation; either version 3, or (at your option) any later
11version.
12
13GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14WARRANTY; without even the implied warranty of MERCHANTABILITY or
15FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
16for more details.
17
18You should have received a copy of the GNU General Public License
19along with GCC; see the file COPYING3.  If not see
20<http://www.gnu.org/licenses/>.  */
21
22#ifndef GCC_INPUT_H
23#define GCC_INPUT_H
24
25#include "line-map.h"
26
27extern GTY(()) struct line_maps *line_table;
28
29/* A value which will never be used to represent a real location.  */
30#define UNKNOWN_LOCATION ((source_location) 0)
31
32/* The location for declarations in "<built-in>" */
33#define BUILTINS_LOCATION ((source_location) 1)
34
35/* line-map.c reserves RESERVED_LOCATION_COUNT to the user.  Ensure
36   both UNKNOWN_LOCATION and BUILTINS_LOCATION fit into that.  */
37extern char builtins_location_check[(BUILTINS_LOCATION
38				     < RESERVED_LOCATION_COUNT) ? 1 : -1];
39
40typedef struct GTY (())
41{
42  /* The name of the source file involved.  */
43  const char *file;
44
45  /* The line-location in the source file.  */
46  int line;
47
48  int column;
49
50  /* In a system header?. */
51  bool sysp;
52} expanded_location;
53
54extern expanded_location expand_location (source_location);
55
56/* Historically GCC used location_t, while cpp used source_location.
57   This could be removed but it hardly seems worth the effort.  */
58typedef source_location location_t;
59
60/* Top-level source file.  */
61extern const char *main_input_filename;
62
63extern location_t input_location;
64
65#define LOCATION_FILE(LOC) ((expand_location (LOC)).file)
66#define LOCATION_LINE(LOC) ((expand_location (LOC)).line)
67
68#define input_line LOCATION_LINE (input_location)
69#define input_filename LOCATION_FILE (input_location)
70#define in_system_header_at(LOC) ((expand_location (LOC)).sysp != 0)
71#define in_system_header (in_system_header_at (input_location))
72
73#endif
74