/* Map logical line numbers to (source file, line number) pairs.
- Copyright (C) 2001
+ Copyright (C) 2001, 2003, 2004
Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
#ifndef GCC_LINE_MAP_H
#define GCC_LINE_MAP_H
-/* The logical line FROM_LINE maps to physical source file TO_FILE at
- line TO_LINE, and subsequently one-to-one until the next line_map
- structure in the set. */
+/* 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};
+
+/* 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;
+typedef source_location fileline; /* deprecated name */
+
+/* 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),
+ and the result_location is less than the next line_map's start_location.
+ (The top line is line 1 and the leftmost column is column 1; line/column 0
+ means "entire file/line" or "unknown line/column" or "not applicable".)
+ INCLUDED_FROM is an index into the set that gives the line mapping
+ at whose end the current one was included. File(s) at the bottom
+ of the include stack have this set to -1. REASON is the reason for
+ 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
{
const char *to_file;
unsigned int to_line;
- unsigned int from_line;
+ source_location start_location;
int included_from;
+ ENUM_BITFIELD (lc_reason) reason : CHAR_BIT;
+ /* The sysp field isn't really needed now that it's in cpp_buffer. */
+ unsigned char sysp;
+ /* Number of the low-order source_location bits used for a column number. */
+ unsigned int column_bits : 8;
};
-/* Contains a sequence of chronological line_map structures. */
+/* A set of chronological line_map structures. */
struct line_maps
{
struct line_map *maps;
unsigned int allocated;
unsigned int used;
-};
-/* Reason for adding a line change with add_line_map (). */
-enum lc_reason {LC_ENTER = 0, LC_LEAVE, LC_RENAME};
+ unsigned int cache;
+
+ /* The most recently listed include stack, if any, starts with
+ LAST_LISTED as the topmost including file. -1 indicates nothing
+ has been listed yet. */
+ int last_listed;
+
+ /* Depth of the include stack, including the current file. */
+ unsigned int depth;
+
+ /* If true, prints an include trace a la -H. */
+ bool trace_includes;
+
+ /* Highest source_location "given out". */
+ source_location highest_location;
+
+ /* Start of line of highest source_location "given out". */
+ source_location highest_line;
+
+ /* The maximum column number we can quickly allocate. Higher numbers
+ may require allocating a new line_map. */
+ unsigned int max_column_hint;
+};
/* Initialize a line map set. */
-extern void init_line_maps
- PARAMS ((struct line_maps *));
+extern void linemap_init (struct line_maps *);
/* Free a line map set. */
-extern void free_line_maps
- PARAMS ((struct line_maps *));
+extern void linemap_free (struct line_maps *);
+
+/* Check for and warn about line_maps entered but not exited. */
+
+extern void linemap_check_files_exited (struct line_maps *);
+
+/* Return a source_location for the start (i.e. column==0) of
+ (physical) line TO_LINE in the current source file (as in the
+ most recent linemap_add). MAX_COLUMN_HINT is the highest column
+ number we expect to use in this line (but it does not change
+ the highest_location). */
+
+extern source_location linemap_line_start
+(struct line_maps *, unsigned int, unsigned int);
/* Add a mapping of logical source line to physical source file and
- line number. Ther text pointed to by TO_FILE must have a lifetime
- at least as long as the final call to lookup_line ().
+ line number.
- FROM_LINE should be monotonic increasing across calls to this
- function. */
-extern struct line_map *add_line_map
- PARAMS ((struct line_maps *, enum lc_reason,
- unsigned int from_line, const char *to_file, unsigned int to_line));
+ The text pointed to by TO_FILE must have a lifetime
+ at least as long as the final call to lookup_line (). An empty
+ TO_FILE means standard input. If reason is LC_LEAVE, and
+ TO_FILE is NULL, then TO_FILE, TO_LINE and SYSP are given their
+ natural values considering the file we are returning to.
+
+ START_LOCATION should be monotonic increasing across calls to this
+ function. A call to this function can relocate the previous set of
+ 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);
/* Given a logical line, returns the map from which the corresponding
(source file, line) pair can be deduced. */
-extern struct line_map *lookup_line
- PARAMS ((struct line_maps *, unsigned int));
+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 *);
-/* Converts a map and logical line to source line. */
-#define SOURCE_LINE(MAP, LINE) ((LINE) + (MAP)->to_line - (MAP)->from_line)
+/* 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_COLUMN(MAP, LINE) \
+ (((LINE) - (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, (MAP)[1].from_line - 1)
+#define LAST_SOURCE_LINE(MAP) \
+ SOURCE_LINE (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)) \
+ + (MAP)->start_location)
+
+/* Returns the map a given map was included from. */
+#define INCLUDED_FROM(SET, MAP) (&(SET)->maps[(MAP)->included_from])
+/* Nonzero if the map is at the bottom of the include stack. */
#define MAIN_FILE_P(MAP) ((MAP)->included_from < 0)
+/* 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) { \
+ unsigned int to_column = (TO_COLUMN); \
+ struct line_maps *set = (SET); \
+ if (__builtin_expect (to_column >= set->max_column_hint, 0)) \
+ (LOC) = linemap_position_for_column (set, to_column); \
+ else { \
+ source_location r = set->highest_line; \
+ r = r + to_column; \
+ if (r >= set->highest_location) \
+ set->highest_location = r; \
+ (LOC) = r; \
+ }}
+
+
+extern source_location
+linemap_position_for_column (struct line_maps *set, unsigned int to_column);
#endif /* !GCC_LINE_MAP_H */
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