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
|
/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk>
* This file is part of the Linux-8086 C library and is distributed
* under the GNU Library General Public License.
*/
/*
* Manuel Novoa III Dec 2000
*
* Converted to use my new (un)signed long (long) to string routines, which
* are smaller than the previous functions and don't require static buffers.
* In the process, removed the reference to strcat and cut object size of
* inet_ntoa in half (from 190 bytes down to 94).
*/
#define __FORCE_GLIBC__
#include <features.h>
#include <string.h>
#include <ctype.h>
#include <netinet/in.h>
int inet_aton(const char *cp, struct in_addr *inp);
#ifdef L_inet_aton
int inet_aton(cp, inp)
const char *cp;
struct in_addr *inp;
{
unsigned long addr;
int value;
int part;
if (!inp)
return 0;
addr = 0;
for (part = 1; part <= 4; part++) {
if (!isdigit(*cp))
return 0;
value = 0;
while (isdigit(*cp)) {
value *= 10;
value += *cp++ - '0';
if (value > 255)
return 0;
}
if (*cp++ != ((part == 4) ? '\0' : '.'))
return 0;
addr <<= 8;
addr |= value;
}
inp->s_addr = htonl(addr);
return 1;
}
#endif
#ifdef L_inet_addr
unsigned long inet_addr(cp)
const char *cp;
{
struct in_addr a;
if (!inet_aton(cp, &a))
return -1;
else
return a.s_addr;
}
#endif
#ifdef L_inet_ntoa
#include <limits.h>
#if (ULONG_MAX >> 32)
/* We're set up for 32 bit unsigned longs */
#error need to check size allocation for static buffer 'buf'
#endif
extern char *__ultostr(char *buf, unsigned long uval, int base, int uppercase);
char *inet_ntoa(in)
struct in_addr in;
{
static char buf[16]; /* max 12 digits + 3 '.'s + 1 nul */
unsigned long addr = ntohl(in.s_addr);
int i;
char *p, *q;
q = 0;
p = buf + sizeof(buf) - 1;
for (i=0 ; i < 4 ; i++ ) {
p = __ultostr(p, addr & 0xff, 10, 0 ) - 1;
addr >>= 8;
if (q) {
*q = '.';
}
q = p;
}
return p+1;
}
#endif
|
