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