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
|
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2016-2025 Free Software Foundation, Inc.
This library 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 3 of the License, or (at your option) any later version.
This library 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.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <mailutils/errno.h>
#include <mailutils/cctype.h>
#include <mailutils/cstr.h>
#ifndef SIZE_MAX
# define SIZE_MAX (~((size_t)0))
#endif
/*
* Converts the initial part of the string in STR to a size_t value.
* A valid input consists of a sequence of decimal digits, and optional
* size suffix: K, M, or G. Any amount of whitespace is allowed at the
* beginning of STR and between the last digit and size suffix.
*
* On success, the result is stored in RET_VAL and 0 is returned.
* On error, RET_VAL remains untouched and one of the following error
* codes is returned:
* EINVAL - STR is NULL.
* MU_ERR_OUT_PTR_NULL
* RET_VAL is NULL.
* ERANGE - Result is out of allowed range for size_t.
* MU_ERR_PARSE - (0) Unexpected character encountered or
* (1) STR is empty or
* (2) STR contains only whitespace characters or
* (3) ENDP is NULL and the portion of STR that remains
* after conversion contains characters other than
* \0 and whitespace,
*
* If ENDP is not NULL, a pointer to the character in STR at which
* the conversion has stopped is stored in *ENDP.
*/
int
mu_strtosize (char const *str, char **endp, size_t *ret_val)
{
size_t n = 0;
int rc = 0;
char const *start, *s;
if (!str)
return EINVAL;
if (!ret_val)
return MU_ERR_OUT_PTR_NULL;
s = start = mu_str_skip_class (str, MU_CTYPE_SPACE);
while (*s && mu_isdigit (*s))
{
size_t x = n * 10 + *s - '0';
if (x < n)
{
rc = ERANGE;
goto end;
}
n = x;
s++;
}
if (s == start)
{
rc = MU_ERR_PARSE;
goto end;
}
str = s;
s = mu_str_skip_class (s, MU_CTYPE_SPACE);
switch (*s++)
{
case 'g':
case 'G':
if (SIZE_MAX / n < 1024)
{
rc = ERANGE;
break;
}
n <<= 10;
case 'm':
case 'M':
if (SIZE_MAX / n < 1024)
{
rc = ERANGE;
break;
}
n <<= 10;
case 'k':
case 'K':
if (SIZE_MAX / n < 1024)
{
rc = ERANGE;
break;
}
n <<= 10;
break;
case 0:
s = str;
break;
default:
s = str;
rc = MU_ERR_PARSE;
}
end:
if (endp)
*endp = (char*) s;
else if (rc == 0 && *mu_str_skip_class (s, MU_CTYPE_SPACE))
rc = MU_ERR_PARSE;
if (rc == 0)
*ret_val = n;
return rc;
}
|
