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
|
/*********************************************************************
* bfs *
* Copyright (C) 2015 Tavian Barnes <tavianator@tavianator.com> *
* *
* This program is free software. It comes without any warranty, to *
* the extent permitted by applicable law. You can redistribute it *
* and/or modify it under the terms of the Do What The Fuck You Want *
* To Public License, Version 2, as published by Sam Hocevar. See *
* the COPYING file or http://www.wtfpl.net/ for more details. *
*********************************************************************/
#ifndef BFS_H
#define BFS_H
#include "color.h"
#include <stdbool.h>
#include <stddef.h>
#include <time.h>
/**
* A command line expression.
*/
struct expr;
/**
* Ephemeral state for evaluating an expression.
*/
struct eval_state;
/**
* Expression evaluation function.
*
* @param expr
* The current expression.
* @param state
* The current evaluation state.
* @return
* The result of the test.
*/
typedef bool eval_fn(const struct expr *expr, struct eval_state *state);
/**
* The parsed command line.
*/
struct cmdline {
/** The array of paths to start from. */
const char **roots;
/** The number of root paths. */
size_t nroots;
/** Color data. */
struct color_table *colors;
/** -color option. */
bool color;
/** -mindepth option. */
int mindepth;
/** -maxdepth option. */
int maxdepth;
/** bftw() flags. */
int flags;
/** The command line expression. */
struct expr *expr;
/** The current time. */
struct timespec now;
};
/**
* Possible types of numeric comparison.
*/
enum cmpflag {
/** Exactly n. */
CMP_EXACT,
/** Less than n. */
CMP_LESS,
/** Greater than n. */
CMP_GREATER,
};
struct expr {
/** The left hand side of the expression. */
struct expr *lhs;
/** The right hand side of the expression. */
struct expr *rhs;
/** The function that evaluates this expression. */
eval_fn *eval;
/** The comparison flag. */
enum cmpflag cmp;
/** Optional integer data for this expression. */
int idata;
/** Optional string data for this expression. */
const char *sdata;
};
/**
* Parse the command line.
*/
struct cmdline *parse_cmdline(int argc, char *argv[]);
/**
* Evaluate the command line.
*/
int eval_cmdline(struct cmdline *cl);
/**
* Free the parsed command line.
*/
void free_cmdline(struct cmdline *cl);
// Predicate evaluation functions
bool eval_true(const struct expr *expr, struct eval_state *state);
bool eval_false(const struct expr *expr, struct eval_state *state);
bool eval_access(const struct expr *expr, struct eval_state *state);
bool eval_amin(const struct expr *expr, struct eval_state *state);
bool eval_atime(const struct expr *expr, struct eval_state *state);
bool eval_cmin(const struct expr *expr, struct eval_state *state);
bool eval_ctime(const struct expr *expr, struct eval_state *state);
bool eval_mmin(const struct expr *expr, struct eval_state *state);
bool eval_mtime(const struct expr *expr, struct eval_state *state);
bool eval_gid(const struct expr *expr, struct eval_state *state);
bool eval_uid(const struct expr *expr, struct eval_state *state);
bool eval_empty(const struct expr *expr, struct eval_state *state);
bool eval_hidden(const struct expr *expr, struct eval_state *state);
bool eval_type(const struct expr *expr, struct eval_state *state);
bool eval_name(const struct expr *expr, struct eval_state *state);
bool eval_path(const struct expr *expr, struct eval_state *state);
bool eval_delete(const struct expr *expr, struct eval_state *state);
bool eval_nohidden(const struct expr *expr, struct eval_state *state);
bool eval_print(const struct expr *expr, struct eval_state *state);
bool eval_print0(const struct expr *expr, struct eval_state *state);
bool eval_prune(const struct expr *expr, struct eval_state *state);
bool eval_quit(const struct expr *expr, struct eval_state *state);
// Operator evaluation functions
bool eval_not(const struct expr *expr, struct eval_state *state);
bool eval_and(const struct expr *expr, struct eval_state *state);
bool eval_or(const struct expr *expr, struct eval_state *state);
bool eval_comma(const struct expr *expr, struct eval_state *state);
#endif // BFS_H
|
