/* Map logical line numbers to (source file, line number) pairs.
- Copyright (C) 2001
+ Copyright (C) 2001, 2003
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
+/* 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 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 */
+
/* 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. 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. */
+ 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 from_line;
int included_from;
+ ENUM_BITFIELD (lc_reason) reason : CHAR_BIT;
+ unsigned char sysp;
};
/* A set of chronological line_map structures. */
struct line_map *maps;
unsigned int allocated;
unsigned int used;
-};
-/* 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};
+ /* 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;
+};
/* 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 *);
/* Add a mapping of logical source line to physical source file and
- line number. The text pointed to by TO_FILE must have a lifetime
- at least as long as the final call to lookup_line ().
+ line number.
+
+ 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.
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));
+ 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,
+ source_location from_line, 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)
of the #include, or other directive, that caused a map change. */
#define LAST_SOURCE_LINE(MAP) SOURCE_LINE ((MAP), (MAP)[1].from_line - 1)
-/* Non-zero if the map is at the bottom of the include stack. */
+/* 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)
/* The current line map. Saves a call to lookup_line if the caller is
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