hphp/parser/location.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #ifndef incl_HPHP_PARSER_LOCATION_H_
  18 #define incl_HPHP_PARSER_LOCATION_H_
  19
  20 #include <cstring>
  21 #include <memory>
  22
  23 namespace HPHP {
  24 ///////////////////////////////////////////////////////////////////////////////
  25
  26 struct Location {
  27   Location() = default;
  28   Location(int l0, int c0, int l1, int c1)
  29       : r(l0, c0, l1, c1) {}
  30
  31   struct Range {
  32     Range() = default;
  33     Range(int l0, int c0, int l1, int c1)
  34         : line0(l0), char0(c0), line1(l1), char1(c1) {}
  35     int line0{1};
  36     int char0{1};
  37     int line1{1};
  38     int char1{1};
  39
  40     int compare(const Range& other) const {
  41       if (line0 < other.line0) return -1;
  42       if (line0 > other.line0) return 1;
  43       if (char0 < other.char0) return -1;
  44       if (char0 > other.char0) return 1;
  45       if (line1 < other.line1) return -1;
  46       if (line1 > other.line1) return 1;
  47       if (char1 < other.char1) return -1;
  48       if (char1 > other.char1) return 1;
  49       return 0;
  50     }
  51   };
  52
  53   const char *file{""};
  54   Range r;
  55   int cursor{0};
  56
  57   void first(int line, char pos) {
  58     r.line0 = line; r.char0 = pos;
  59   }
  60   void first(Location &loc) {
  61     r.line0 = loc.r.line0; r.char0 = loc.r.char0;
  62   }
  63   void last(int line, char pos) {
  64     r.line1 = line; r.char1 = pos;
  65   }
  66   void last(Location &loc) {
  67     r.line1 = loc.r.line1; r.char1 = loc.r.char1;
  68   }
  69
  70   /**
  71    * This only guarantees consistent result between two locations, whether or
  72    * not it makes sense, because we're comparing those integers first for
  73    * quicker sorting.
  74    */
  75   int compare(const Location *loc) const {
  76     if (auto d = r.compare(loc->r)) return d;
  77     return strcmp(file, loc->file);
  78   }
  79 };
  80
  81 ///////////////////////////////////////////////////////////////////////////////
  82 }
  83
  84 #endif // incl_HPHP_PARSER_LOCATION_H_