gcc/rust/rust-linemap.cc

   1 // Copyright (C) 2020-2024 Free Software Foundation, Inc.
   2
   3 // This file is part of GCC.
   4
   5 // GCC is free software; you can redistribute it and/or modify it under
   6 // the terms of the GNU General Public License as published by the Free
   7 // Software Foundation; either version 3, or (at your option) any later
   8 // version.
   9
  10 // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  11 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13 // for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with GCC; see the file COPYING3.  If not see
  17 // <http://www.gnu.org/licenses/>.
  18
  19 // rust-linemap.cc -- GCC implementation of Linemap.
  20
  21 #include "rust-linemap.h"
  22
  23 Linemap *Linemap::instance_ = NULL;
  24
  25 // Start getting locations from a new file.
  26
  27 void
  28 Linemap::start_file (const char *file_name, unsigned line_begin)
  29 {
  30   if (this->in_file_)
  31     linemap_add (line_table, LC_LEAVE, 0, NULL, 0);
  32   linemap_add (line_table, LC_ENTER, 0, file_name, line_begin);
  33   this->in_file_ = true;
  34 }
  35
  36 // Stringify a location
  37
  38 std::string
  39 Linemap::location_to_string (location_t location)
  40 {
  41   const line_map_ordinary *lmo;
  42   location_t resolved_location;
  43
  44   // Screen out unknown and predeclared locations; produce output
  45   // only for simple file:line locations.
  46   resolved_location = linemap_resolve_location (line_table, location,
  47                                                 LRK_SPELLING_LOCATION, &lmo);
  48   if (lmo == NULL || resolved_location < RESERVED_LOCATION_COUNT)
  49     return "";
  50   const char *path = LINEMAP_FILE (lmo);
  51   if (!path)
  52     return "";
  53
  54   // Strip the source file down to the base file, to reduce clutter.
  55   std::stringstream ss;
  56   ss << lbasename (path) << ":" << SOURCE_LINE (lmo, location) << ":"
  57      << SOURCE_COLUMN (lmo, location);
  58   return ss.str ();
  59 }
  60
  61 // Stop getting locations.
  62
  63 void
  64 Linemap::stop ()
  65 {
  66   linemap_add (line_table, LC_LEAVE, 0, NULL, 0);
  67   this->in_file_ = false;
  68 }
  69
  70 // Return the Linemap to use for the gcc backend.
  71
  72 Linemap *
  73 rust_get_linemap ()
  74 {
  75   return new Linemap;
  76 }