/* Locations for Bison
- Copyright (C) 2002 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009 Free Software
+ Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
- Bison is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bison is distributed in the hope that it will be useful,
+ This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with Bison; see the file COPYING. If not, write to
- the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef LOCATION_H_
# define LOCATION_H_
-typedef struct location_s
+# include "uniqstr.h"
+
+/* A boundary between two characters. */
+typedef struct
+{
+ /* The name of the file that contains the boundary. */
+ uniqstr file;
+
+ /* If nonnegative, the (origin-1) line that contains the boundary.
+ If this is INT_MAX, the line number has overflowed.
+
+ Meaningless and not displayed if negative.
+ */
+ int line;
+
+ /* If nonnegative, the (origin-1) column just after the boundary.
+ This is neither a byte count, nor a character count; it is a
+ column count. If this is INT_MAX, the column number has
+ overflowed.
+
+ Meaningless and not displayed if negative.
+ */
+ int column;
+
+} boundary;
+
+/* Set the position of \a a. */
+static inline void
+boundary_set (boundary *b, const char *f, int l, int c)
+{
+ b->file = f;
+ b->line = l;
+ b->column = c;
+}
+
+/* Return -1, 0, 1, depending whether a is before, equal, or
+ after b. */
+static inline int
+boundary_cmp (boundary a, boundary b)
+{
+ int res = strcmp (a.file, b.file);
+ if (!res)
+ res = a.line - b.line;
+ if (!res)
+ res = a.column - b.column;
+ return res;
+}
+
+/* Return nonzero if A and B are equal boundaries. */
+static inline bool
+equal_boundaries (boundary a, boundary b)
{
- int first_line;
- int first_column;
- int last_line;
- int last_column;
-} location_t;
-#define YYLTYPE location_t
-
-/* Initialize LOC. */
-# define LOCATION_RESET(Loc) \
- (Loc).first_column = (Loc).first_line = 1; \
- (Loc).last_column = (Loc).last_line = 1;
-
-/* Advance of NUM columns. */
-# define LOCATION_COLUMNS(Loc, Num) \
- (Loc).last_column += Num;
-
-/* Advance of NUM lines. */
-# define LOCATION_LINES(Loc, Num) \
- (Loc).last_column = 1; \
- (Loc).last_line += Num;
-
-/* Restart: move the first cursor to the last position. */
-# define LOCATION_STEP(Loc) \
- (Loc).first_column = (Loc).last_column; \
- (Loc).first_line = (Loc).last_line;
-
-/* Output LOC on the stream OUT. */
-# define LOCATION_PRINT(Out, Loc) \
- fprintf (stderr, "%s:", infile); \
- if ((Loc).first_line != (Loc).last_line) \
- fprintf (Out, "%d.%d-%d.%d", \
- (Loc).first_line, (Loc).first_column, \
- (Loc).last_line, (Loc).last_column - 1); \
- else if ((Loc).first_column < (Loc).last_column - 1) \
- fprintf (Out, "%d.%d-%d", (Loc).first_line, \
- (Loc).first_column, (Loc).last_column - 1); \
- else \
- fprintf (Out, "%d.%d", (Loc).first_line, (Loc).first_column)
-
-
-extern location_t empty_location;
-#endif /* !LOCATION_H_ */
+ return (a.column == b.column
+ && a.line == b.line
+ && UNIQSTR_EQ (a.file, b.file));
+}
+
+/* A location, that is, a region of source code. */
+typedef struct
+{
+ /* Boundary just before the location starts. */
+ boundary start;
+
+ /* Boundary just after the location ends. */
+ boundary end;
+
+} location;
+
+#define YYLTYPE location
+
+#define EMPTY_LOCATION_INIT {{NULL, 0, 0}, {NULL, 0, 0}}
+extern location const empty_location;
+
+/* Set *LOC and adjust scanner cursor to account for token TOKEN of
+ size SIZE. */
+void location_compute (location *loc,
+ boundary *cur, char const *token, size_t size);
+
+/* Print location to file. Return number of actually printed
+ characters. */
+unsigned location_print (FILE *out, location loc);
+
+/* Return -1, 0, 1, depending whether a is before, equal, or
+ after b. */
+static inline int
+location_cmp (location a, location b)
+{
+ int res = boundary_cmp (a.start, b.start);
+ if (!res)
+ res = boundary_cmp (a.end, b.end);
+ return res;
+}
+
+/* LOC_STR must be formatted as `file:line.column', it will be modified. */
+void boundary_set_from_string (boundary *bound, char *loc_str);
+
+#endif /* ! defined LOCATION_H_ */
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