1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/* Locations for Bison
Copyright (C) 2002, 2004-2013 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef LOCATION_H_
# define LOCATION_H_
# include <stdbool.h>
# include <stdio.h>
# include <string.h> /* strcmp */
# include "uniqstr.h"
/* A boundary between two characters. */
typedef struct
{
/* The name of the file that contains the boundary. */
uniqstr file;
/* If nonnegative, the (origin-1) line that contains the boundary.
If this is INT_MAX, the line number has overflowed.
Meaningless and not displayed if negative.
*/
int line;
/* If nonnegative, the (origin-1) column just after the boundary.
This is neither a byte count, nor a character count; it is a
column count. If this is INT_MAX, the column number has
overflowed.
Meaningless and not displayed if negative.
*/
int column;
} boundary;
/* Set the position of \a a. */
static inline void
boundary_set (boundary *b, const char *f, int l, int c)
{
b->file = f;
b->line = l;
b->column = c;
}
/* Return -1, 0, 1, depending whether a is before, equal, or
after b. */
static inline int
boundary_cmp (boundary a, boundary b)
{
int res = strcmp (a.file, b.file);
if (!res)
res = a.line - b.line;
if (!res)
res = a.column - b.column;
return res;
}
/* Return nonzero if A and B are equal boundaries. */
static inline bool
equal_boundaries (boundary a, boundary b)
{
return (a.column == b.column
&& a.line == b.line
&& UNIQSTR_EQ (a.file, b.file));
}
/* A location, that is, a region of source code. */
typedef struct
{
/* Boundary just before the location starts. */
boundary start;
/* Boundary just after the location ends. */
boundary end;
} location;
# define GRAM_LTYPE location
# define EMPTY_LOCATION_INIT {{NULL, 0, 0}, {NULL, 0, 0}}
extern location const empty_location;
/* Set *LOC and adjust scanner cursor to account for token TOKEN of
size SIZE. */
void location_compute (location *loc,
boundary *cur, char const *token, size_t size);
/* Print location to file.
Return number of actually printed characters.
Warning: uses quotearg's slot 3. */
unsigned location_print (location loc, FILE *out);
/* Free any allocated ressources and close any open file handles that are
left-over by the usage of location_caret. */
void cleanup_caret (void);
/* Output to OUT the line and caret corresponding to location LOC. */
void location_caret (location loc, FILE *out);
/* Return -1, 0, 1, depending whether a is before, equal, or
after b. */
static inline int
location_cmp (location a, location b)
{
int res = boundary_cmp (a.start, b.start);
if (!res)
res = boundary_cmp (a.end, b.end);
return res;
}
/* LOC_STR must be formatted as 'file:line.column', it will be modified. */
void boundary_set_from_string (boundary *bound, char *loc_str);
#endif /* ! defined LOCATION_H_ */
|
