1 // go-linemap.cc -- GCC implementation of Linemap.
3 // Copyright 2011 The Go Authors. All rights reserved.
4 // Use of this source code is governed by a BSD-style
5 // license that can be found in the LICENSE file.
7 #include "go-linemap.h"
9 // This class implements the Linemap interface defined by the
12 class Gcc_linemap : public Linemap
21 start_file(const char* file_name, unsigned int line_begin);
24 start_line(unsigned int line_number, unsigned int line_size);
27 get_location(unsigned int column);
34 get_predeclared_location();
37 get_unknown_location();
40 is_predeclared(Location);
46 // Whether we are currently reading a file.
50 Linemap* Linemap::instance_ = NULL;
52 // Start getting locations from a new file.
55 Gcc_linemap::start_file(const char *file_name, unsigned line_begin)
58 linemap_add(line_table, LC_LEAVE, 0, NULL, 0);
59 linemap_add(line_table, LC_ENTER, 0, file_name, line_begin);
60 this->in_file_ = true;
63 // Stop getting locations.
68 linemap_add(line_table, LC_LEAVE, 0, NULL, 0);
69 this->in_file_ = false;
75 Gcc_linemap::start_line(unsigned lineno, unsigned linesize)
77 linemap_line_start(line_table, lineno, linesize);
83 Gcc_linemap::get_location(unsigned column)
85 return Location(linemap_position_for_column(line_table, column));
88 // Get the unknown location.
91 Gcc_linemap::get_unknown_location()
93 return Location(UNKNOWN_LOCATION);
96 // Get the predeclared location.
99 Gcc_linemap::get_predeclared_location()
101 return Location(BUILTINS_LOCATION);
104 // Return whether a location is the predeclared location.
107 Gcc_linemap::is_predeclared(Location loc)
109 return loc.gcc_location() == BUILTINS_LOCATION;
112 // Return whether a location is the unknown location.
115 Gcc_linemap::is_unknown(Location loc)
117 return loc.gcc_location() == UNKNOWN_LOCATION;
120 // Return the Linemap to use for the gcc backend.
125 return new Gcc_linemap;