/* Map logical line numbers to (source file, line number) pairs.
- Copyright (C) 2001, 2003, 2004
+ Copyright (C) 2001, 2003, 2004, 2007, 2008, 2009
Free Software Foundation, Inc.
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
+Free Software Foundation; either version 3, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+along with this program; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>.
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
#ifndef LIBCPP_LINE_MAP_H
#define LIBCPP_LINE_MAP_H
+#ifndef GTY
+#define GTY(x) /* nothing */
+#endif
+
/* Reason for adding a line change with add_line_map (). LC_ENTER is
when including a new file, e.g. a #include directive in C.
LC_LEAVE is when reaching a file's end. LC_RENAME is when a file
name or line number changes for neither of the above reasons
- (e.g. a #line directive in C). */
-enum lc_reason {LC_ENTER = 0, LC_LEAVE, LC_RENAME};
+ (e.g. a #line directive in C); LC_RENAME_VERBATIM is like LC_RENAME
+ but a filename of "" is not specially interpreted as standard input. */
+enum lc_reason {LC_ENTER = 0, LC_LEAVE, LC_RENAME, LC_RENAME_VERBATIM};
+
+/* The type of line numbers. */
+typedef unsigned int linenum_type;
/* A logical line/column number, i.e. an "index" into a line_map. */
/* Long-term, we want to use this to replace struct location_s (in input.h),
and effectively typedef source_location location_t. */
typedef unsigned int source_location;
+/* Memory allocation function typedef. Works like xrealloc. */
+typedef void *(*line_map_realloc) (void *, size_t);
+
/* Physical source file TO_FILE at line TO_LINE at column 0 is represented
by the logical START_LOCATION. TO_LINE+L at column C is represented by
START_LOCATION+(L*(1<<column_bits))+C, as long as C<(1<<column_bits),
creation of this line map, SYSP is one for a system header, two for
a C system header file that therefore needs to be extern "C"
protected in C++, and zero otherwise. */
-struct line_map
-{
+struct GTY(()) line_map {
const char *to_file;
- unsigned int to_line;
+ linenum_type to_line;
source_location start_location;
int included_from;
ENUM_BITFIELD (lc_reason) reason : CHAR_BIT;
};
/* A set of chronological line_map structures. */
-struct line_maps
-{
- struct line_map *maps;
+struct GTY(()) line_maps {
+ struct line_map * GTY ((length ("%h.used"))) maps;
unsigned int allocated;
unsigned int used;
/* The maximum column number we can quickly allocate. Higher numbers
may require allocating a new line_map. */
unsigned int max_column_hint;
+
+ /* If non-null, the allocator to use when resizing 'maps'. If null,
+ xrealloc is used. */
+ line_map_realloc reallocator;
};
/* Initialize a line map set. */
the highest_location). */
extern source_location linemap_line_start
-(struct line_maps *set, unsigned int to_line, unsigned int max_column_hint);
+(struct line_maps *set, linenum_type to_line, unsigned int max_column_hint);
/* Add a mapping of logical source line to physical source file and
line number.
maps, so any stored line_map pointers should not be used. */
extern const struct line_map *linemap_add
(struct line_maps *, enum lc_reason, unsigned int sysp,
- const char *to_file, unsigned int to_line);
+ const char *to_file, linenum_type to_line);
/* Given a logical line, returns the map from which the corresponding
(source file, line) pair can be deduced. */
extern const struct line_map *linemap_lookup
(struct line_maps *, source_location);
-/* Print the file names and line numbers of the #include commands
- which led to the map MAP, if any, to stderr. Nothing is output if
- the most recently listed stack is the same as the current one. */
-extern void linemap_print_containing_files (struct line_maps *,
- const struct line_map *);
+/* source_location values from 0 to RESERVED_LOCATION_COUNT-1 will
+ be reserved for libcpp user as special values, no token from libcpp
+ will contain any of those locations. */
+#define RESERVED_LOCATION_COUNT 2
/* Converts a map and a source_location to source line. */
-#define SOURCE_LINE(MAP, LINE) \
- ((((LINE) - (MAP)->start_location) >> (MAP)->column_bits) + (MAP)->to_line)
+#define SOURCE_LINE(MAP, LOC) \
+ ((((LOC) - (MAP)->start_location) >> (MAP)->column_bits) + (MAP)->to_line)
-#define SOURCE_COLUMN(MAP, LINE) \
- (((LINE) - (MAP)->start_location) & ((1 << (MAP)->column_bits) - 1))
+#define SOURCE_COLUMN(MAP, LOC) \
+ (((LOC) - (MAP)->start_location) & ((1 << (MAP)->column_bits) - 1))
/* Returns the last source line within a map. This is the (last) line
of the #include, or other directive, that caused a map change. */
#define LAST_SOURCE_LINE(MAP) \
SOURCE_LINE (MAP, LAST_SOURCE_LINE_LOCATION (MAP))
+#define LAST_SOURCE_COLUMN(MAP) \
+ SOURCE_COLUMN (MAP, LAST_SOURCE_LINE_LOCATION (MAP))
#define LAST_SOURCE_LINE_LOCATION(MAP) \
((((MAP)[1].start_location - 1 - (MAP)->start_location) \
& ~((1 << (MAP)->column_bits) - 1)) \
/* Set LOC to a source position that is the same line as the most recent
linemap_line_start, but with the specified TO_COLUMN column number. */
-#define LINEMAP_POSITION_FOR_COLUMN(LOC, SET, TO_COLUMN) { \
+#define LINEMAP_POSITION_FOR_COLUMN(LOC, SET, TO_COLUMN) do { \
unsigned int to_column = (TO_COLUMN); \
struct line_maps *set = (SET); \
if (__builtin_expect (to_column >= set->max_column_hint, 0)) \
if (r >= set->highest_location) \
set->highest_location = r; \
(LOC) = r; \
- }}
+ }} while (0)
extern source_location
linemap_position_for_column (struct line_maps *set, unsigned int to_column);
+
#endif /* !LIBCPP_LINE_MAP_H */
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