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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/* Locations for Bison
Copyright (C) 2002, 2004-2015, 2018-2020 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 positive, the line (starting at 1) that contains the boundary.
If this is INT_MAX, the line number has overflowed.
Meaningless and not displayed if nonpositive.
*/
int line;
/* If positive, the column (starting at 1) just after the boundary.
This is neither a byte count, nor a character count; it is a
(visual) column count. If this is INT_MAX, the column number has
overflowed.
Meaningless and not displayed if nonpositive. */
int column;
/* If nonnegative, the byte number (starting at 0) in the current
line. Not displayed (unless --trace=location). */
int byte;
} boundary;
/* Set the position of \a p. */
static inline void
boundary_set (boundary *p, const char *f, int l, int c, int b)
{
p->file = f;
p->line = l;
p->column = c;
p->byte = b;
}
/* Return -1, 0, 1, depending whether a is before, equal, or
after b. */
static inline int
boundary_cmp (boundary a, boundary b)
{
/* Locations with no file first. */
int res =
a.file && b.file ? strcmp (a.file, b.file)
: a.file ? 1
: b.file ? -1
: 0;
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, 0}, {NULL, 0, 0, 0}}
extern location const empty_loc;
/* 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. */
int location_print (location loc, FILE *out);
/* Prepare the use of location_caret. */
void caret_init (void);
/* Free any allocated resources and close any open file handles that are
left-over by the usage of location_caret. */
void caret_free (void);
/* If -fcaret is enabled, quote the line containing LOC onto OUT.
Highlight the part of LOC with the color STYLE. */
void location_caret (location loc, const char* style, FILE *out);
/* If -fcaret is enabled, display a suggestion of replacement for LOC
with S. To call after location_caret. */
void location_caret_suggestion (location loc, const char *s, 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;
}
/* Whether this is the empty location. */
bool location_empty (location loc);
/* STR must be formatted as 'file:line.column@byte' or 'file:line.column',
it will be modified. */
void boundary_set_from_string (boundary *bound, char *str);
#endif /* ! defined LOCATION_H_ */
|
