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120 lines
4.7 KiB
C
120 lines
4.7 KiB
C
/* Map logical line numbers to (source file, line number) pairs.
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Copyright (C) 2001
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Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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In other words, you are welcome to use, share and improve this program.
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You are forbidden to forbid anyone else to use, share and improve
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what you give them. Help stamp out software-hoarding! */
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#ifndef GCC_LINE_MAP_H
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#define GCC_LINE_MAP_H
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/* Reason for adding a line change with add_line_map (). LC_ENTER is
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when including a new file, e.g. a #include directive in C.
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LC_LEAVE is when reaching a file's end. LC_RENAME is when a file
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name or line number changes for neither of the above reasons
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(e.g. a #line directive in C). */
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enum lc_reason {LC_ENTER = 0, LC_LEAVE, LC_RENAME};
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/* The logical line FROM_LINE maps to physical source file TO_FILE at
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line TO_LINE, and subsequently one-to-one until the next line_map
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structure in the set. INCLUDED_FROM is an index into the set that
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gives the line mapping at whose end the current one was included.
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File(s) at the bottom of the include stack have this set to -1.
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REASON is the reason for creation of this line map, SYSP is one for
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a system header, two for a C system header file that therefore
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needs to be extern "C" protected in C++, and zero otherwise. */
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struct line_map
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{
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const char *to_file;
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unsigned int to_line;
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unsigned int from_line;
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int included_from;
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ENUM_BITFIELD (lc_reason) reason : CHAR_BIT;
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unsigned char sysp;
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};
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/* A set of chronological line_map structures. */
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struct line_maps
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{
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struct line_map *maps;
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unsigned int allocated;
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unsigned int used;
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/* The most recently listed include stack, if any, starts with
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LAST_LISTED as the topmost including file. -1 indicates nothing
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has been listed yet. */
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int last_listed;
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/* Depth of the include stack, including the current file. */
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unsigned int depth;
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/* If true, prints an include trace a la -H. */
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bool trace_includes;
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};
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/* Initialize a line map set. */
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extern void init_line_maps
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PARAMS ((struct line_maps *));
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/* Free a line map set. */
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extern void free_line_maps
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PARAMS ((struct line_maps *));
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/* Add a mapping of logical source line to physical source file and
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line number. The text pointed to by TO_FILE must have a lifetime
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at least as long as the line maps. If reason is LC_LEAVE, and
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TO_FILE is NULL, then TO_FILE, TO_LINE and SYSP are given their
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natural values considering the file we are returning to.
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FROM_LINE should be monotonic increasing across calls to this
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function. A call to this function can relocate the previous set of
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maps, so any stored line_map pointers should not be used. */
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extern const struct line_map *add_line_map
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PARAMS ((struct line_maps *, enum lc_reason, unsigned int sysp,
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unsigned int from_line, const char *to_file, unsigned int to_line));
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/* Given a logical line, returns the map from which the corresponding
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(source file, line) pair can be deduced. */
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extern const struct line_map *lookup_line
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PARAMS ((struct line_maps *, unsigned int));
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/* Print the file names and line numbers of the #include commands
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which led to the map MAP, if any, to stderr. Nothing is output if
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the most recently listed stack is the same as the current one. */
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extern void print_containing_files
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PARAMS ((struct line_maps *, const struct line_map *));
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/* Converts a map and logical line to source line. */
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#define SOURCE_LINE(MAP, LINE) ((LINE) + (MAP)->to_line - (MAP)->from_line)
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/* Returns the last source line within a map. This is the (last) line
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of the #include, or other directive, that caused a map change. */
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#define LAST_SOURCE_LINE(MAP) SOURCE_LINE ((MAP), (MAP)[1].from_line - 1)
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/* Returns the map a given map was included from. */
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#define INCLUDED_FROM(SET, MAP) (&(SET)->maps[(MAP)->included_from])
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/* Non-zero if the map is at the bottom of the include stack. */
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#define MAIN_FILE_P(MAP) ((MAP)->included_from < 0)
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/* The current line map. Saves a call to lookup_line if the caller is
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sure he is in the scope of the current map. */
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#define CURRENT_LINE_MAP(MAPS) ((MAPS)->maps + (MAPS)->used - 1)
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#endif /* !GCC_LINE_MAP_H */
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