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
|
/*
* parser.c - NILFS parser library
*
* Copyright (C) 2009-2012 Nippon Telegraph and Telephone Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* Written by Ryusuke Konishi <konishi.ryusuke@gmail.com>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif /* HAVE_STDLIB_H */
#if HAVE_STRING_H
#include <string.h>
#endif /* HAVE_STRING_H */
#if HAVE_LIMITS_H
#include <limits.h>
#endif /* HAVE_LIMITS_H */
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include "nilfs.h"
nilfs_cno_t nilfs_parse_cno(const char *arg, char **endptr, int base)
{
/* ensure the number we are about to parse is not negative, which
* strtoull() will happily accept and cast to an unsigned value. */
while (isspace(*arg))
arg++;
if (*arg == '-')
return NILFS_CNO_MAX;
return strtoull(arg, endptr, base);
}
int nilfs_parse_cno_range(const char *arg, __u64 *start, __u64 *end, int base)
{
const char *delim;
char *endptr;
nilfs_cno_t cno, cno2;
assert(arg && *arg != '\0');
delim = strstr(arg, "..");
if (delim && delim == arg) {
if (arg[2] != '\0') {
/* ..yyy */
cno = nilfs_parse_cno(arg + 2, &endptr, base);
if (cno < NILFS_CNO_MAX && *endptr == '\0') {
/* ..CNO */
*start = NILFS_CNO_MIN;
*end = cno;
return 0;
}
}
} else if (!delim) {
/* xxx */
cno = nilfs_parse_cno(arg, &endptr, base);
if (cno < NILFS_CNO_MAX && *endptr == '\0') {
/* CNO */
*start = *end = cno;
return 0;
}
} else {
/* xxx..yyy */
cno = nilfs_parse_cno(arg, &endptr, base);
if (cno < NILFS_CNO_MAX && endptr == delim) {
if (delim[2] == '\0') {
/* CNO.. */
*start = cno;
*end = NILFS_CNO_MAX;
return 0;
}
cno2 = nilfs_parse_cno(delim + 2, &endptr, base);
if (cno2 < NILFS_CNO_MAX && *endptr == '\0') {
/* CNO..CNO */
*start = cno;
*end = cno2;
return 0;
}
}
}
return -1; /* parse error */
}
int nilfs_parse_protection_period(const char *arg, unsigned long *period)
{
unsigned long long val;
char *endptr;
int ret = 0;
val = strtoull(arg, &endptr, 10);
if (endptr == arg) {
errno = EINVAL;
ret = -1;
goto out;
} else if (endptr[0] != '\0' && endptr[1] == '\0' && val < ULONG_MAX) {
switch (endptr[0]) {
case 's':
break;
case 'm':
val *= 60;
break;
case 'h':
val *= 3600;
break;
case 'd':
val *= 86400;
break;
case 'w':
val *= 604800;
break;
case 'M':
val *= 2678400;
break;
case 'Y':
val *= 31536000;
break;
default:
ret = -1;
goto out;
}
}
if (val >= ULONG_MAX) {
errno = ERANGE;
ret = -1;
goto out;
}
*period = val;
out:
return ret;
}
|
