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| 1 /* Locations for Bison |
| 2 Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
| 3 |
| 4 This file is part of Bison, the GNU Compiler Compiler. |
| 5 |
| 6 This program 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 3 of the License, or |
| 9 (at your option) any later version. |
| 10 |
| 11 This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 |
| 19 #ifndef LOCATION_H_ |
| 20 # define LOCATION_H_ |
| 21 |
| 22 # include "uniqstr.h" |
| 23 |
| 24 /* A boundary between two characters. */ |
| 25 typedef struct |
| 26 { |
| 27 /* The name of the file that contains the boundary. */ |
| 28 uniqstr file; |
| 29 |
| 30 /* The (origin-1) line that contains the boundary. |
| 31 If this is INT_MAX, the line number has overflowed. */ |
| 32 int line; |
| 33 |
| 34 /* The (origin-1) column just after the boundary. This is neither a |
| 35 byte count, nor a character count; it is a column count. |
| 36 If this is INT_MAX, the column number has overflowed. */ |
| 37 int column; |
| 38 |
| 39 } boundary; |
| 40 |
| 41 /* Set the position of \a a. */ |
| 42 static inline void |
| 43 boundary_set (boundary *b, const char *f, int l, int c) |
| 44 { |
| 45 b->file = f; |
| 46 b->line = l; |
| 47 b->column = c; |
| 48 } |
| 49 |
| 50 /* Return nonzero if A and B are equal boundaries. */ |
| 51 static inline bool |
| 52 equal_boundaries (boundary a, boundary b) |
| 53 { |
| 54 return (a.column == b.column |
| 55 && a.line == b.line |
| 56 && UNIQSTR_EQ (a.file, b.file)); |
| 57 } |
| 58 |
| 59 /* A location, that is, a region of source code. */ |
| 60 typedef struct |
| 61 { |
| 62 /* Boundary just before the location starts. */ |
| 63 boundary start; |
| 64 |
| 65 /* Boundary just after the location ends. */ |
| 66 boundary end; |
| 67 |
| 68 } location; |
| 69 |
| 70 #define YYLTYPE location |
| 71 |
| 72 #define EMPTY_LOCATION_INIT {{NULL, 0, 0}, {NULL, 0, 0}} |
| 73 extern location const empty_location; |
| 74 |
| 75 /* Set *LOC and adjust scanner cursor to account for token TOKEN of |
| 76 size SIZE. */ |
| 77 void location_compute (location *loc, |
| 78 boundary *cur, char const *token, size_t size); |
| 79 |
| 80 void location_print (FILE *out, location loc); |
| 81 |
| 82 /* LOC_STR must be formatted as `file:line.column', it will be modified. */ |
| 83 void boundary_set_from_string (boundary *bound, char *loc_str); |
| 84 |
| 85 #endif /* ! defined LOCATION_H_ */ |
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