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
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2003, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/
#include "setup.h"
#include "strtoofft.h"
#ifdef NEED_CURL_STRTOLL
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
static int get_char(char c, int base);
/**
* Emulated version of the strtoll function. This extracts a long long
* value from the given input string and returns it.
*/
long long
Curl_strtoll(const char *nptr, char **endptr, int base)
{
char *end;
int is_negative = 0;
int overflow;
int i;
long long value = 0;
long long newval;
/* Skip leading whitespace. */
end = (char *)nptr;
while (isspace((int)end[0])) {
end++;
}
/* Handle the sign, if any. */
if (end[0] == '-') {
is_negative = 1;
end++;
} else if (end[0] == '+') {
end++;
} else if (end[0] == '\0') {
/* We had nothing but perhaps some whitespace -- there was no number. */
if (endptr) {
*endptr = end;
}
return 0;
}
/* Handle special beginnings, if present and allowed. */
if (end[0] == '0' && end[1] == 'x') {
if (base == 16 || base == 0) {
end += 2;
base = 16;
}
} else if (end[0] == '0') {
if (base == 8 || base == 0) {
end++;
base = 8;
}
}
/* Matching strtol, if the base is 0 and it doesn't look like
* the number is octal or hex, we assume it's base 10.
*/
if (base == 0) {
base = 10;
}
/* Loop handling digits. */
value = 0;
overflow = 0;
for (i = get_char(end[0], base);
i != -1;
end++, i = get_char(end[0], base))
{
newval = base * value + i;
if (newval < value) {
/* We've overflowed. */
overflow = 1;
break;
} else {
value = newval;
}
}
if (!overflow) {
if (is_negative) {
/* Fix the sign. */
value *= -1;
}
} else {
if (is_negative) {
value = 0x8000000000000000L;
} else {
value = 0x7FFFFFFFFFFFFFFFL;
}
errno = ERANGE;
}
if (endptr) {
*endptr = end;
}
return value;
}
/**
* Returns the value of c in the given base, or -1 if c cannot
* be interpreted properly in that base (i.e., is out of range,
* is a null, etc.).
*
* @param c the character to interpret according to base
* @param base the base in which to interpret c
*
* @return the value of c in base, or -1 if c isn't in range
*/
static int get_char(char c, int base) {
int value = -1;
if (c <= '9' && c >= '0') {
value = c - '0';
} else if (c <= 'Z' && c >= 'A') {
value = c - 'A' + 10;
} else if (c <= 'z' && c >= 'a') {
value = c - 'a' + 10;
}
if (value >= base) {
value = -1;
}
return value;
}
#endif /* Only present if we need strtoll, but don't have it. */
|
