1 /* Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
2 
3    This program is free software; you can redistribute it and/or modify
4    it under the terms of the GNU General Public License, version 2.0,
5    as published by the Free Software Foundation.
6 
7    This program is also distributed with certain software (including
8    but not limited to OpenSSL) that is licensed under separate terms,
9    as designated in a particular file or component or in included license
10    documentation.  The authors of MySQL hereby grant you an additional
11    permission to link the program and your derivative works with the
12    separately licensed software that they have included with MySQL.
13 
14    This program is distributed in the hope that it will be useful,
15    but WITHOUT ANY WARRANTY; without even the implied warranty of
16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17    GNU General Public License, version 2.0, for more details.
18 
19    You should have received a copy of the GNU General Public License
20    along with this program; if not, write to the Free Software
21    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
22 
23 #ifndef PARSE_LOCATION_INCLUDED
24 #define PARSE_LOCATION_INCLUDED
25 
26 
27 /**
28   Helper class for the YYLTYPE
29 */
30 struct Symbol_location
31 {
32   const char *start; // token start
33   const char *end;   // the 1st byte after the token
34 
is_emptySymbol_location35   bool is_empty() const { return length() == 0; }
lengthSymbol_location36   size_t length() const { return static_cast<size_t>(end - start); }
37 };
38 
39 
40 /**
41   Bison "location" class
42 */
43 typedef struct YYLTYPE
44 {
45   Symbol_location  cpp; // token location in the preprocessed buffer
46   Symbol_location  raw; // token location in the raw buffer
47 
is_emptyYYLTYPE48   bool is_empty() const { return cpp.is_empty(); }
49 
50 } YYLTYPE;
51 
52 #define YYLTYPE_IS_DECLARED 1 // signal Bison that we have our own YYLTYPE
53 
54 /**
55   Bison calls this macro:
56   1. each time a rule is matched and
57   2. to compute a syntax error location.
58 
59   @param Current [out] location of the whole matched rule
60   @param Rhs           locations of all right hand side elements in the rule
61   @param N             number of right hand side elements in the rule
62 */
63 #define YYLLOC_DEFAULT(Current, Rhs, N)                             \
64     do                                                              \
65       if (N)                                                        \
66       {                                                             \
67         (Current).cpp.start= YYRHSLOC(Rhs, 1).cpp.start;            \
68         (Current).cpp.end=   YYRHSLOC(Rhs, N).cpp.end;              \
69         (Current).raw.start= YYRHSLOC(Rhs, 1).raw.start;            \
70         (Current).raw.end=   YYRHSLOC(Rhs, N).raw.end;              \
71       }                                                             \
72       else                                                          \
73       {                                                             \
74         (Current).cpp.start=                                        \
75         (Current).cpp.end=   YYRHSLOC(Rhs, 0).cpp.end;              \
76         (Current).raw.start=                                        \
77         (Current).raw.end=   YYRHSLOC(Rhs, 0).raw.end;              \
78       }                                                             \
79     while (0)
80 
81 #endif /* PARSE_LOCATION_INCLUDED */
82