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
|
/* uuencode.c - uuencode / base64 encode
*
* Copyright 2013 Erich Plondke <toybox@erich.wreck.org>
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/uuencode.html
USE_UUENCODE(NEWTOY(uuencode, "<1>2m", TOYFLAG_USR|TOYFLAG_BIN))
config UUENCODE
bool "uuencode"
default n
help
usage: uuencode [-m] [file] encode-filename
Uuencode stdin (or file) to stdout, with encode-filename in the output.
-m base64-encode
*/
#define FOR_uuencode
#include "toys.h"
// Convert 3 bytes of input to 4 bytes of output
static void uuencode_b64_3bytes(const char *in, int bytes)
{
unsigned int i, x;
for (i = x = 0; i<4; i++) {
if (i < bytes) x |= (in[i] & 0x0ff) << (8*(2-i));
xputc(i > bytes ? '=' : toybuf[(x>>((3-i)*6)) & 0x3f]);
}
}
static void uuencode_b64_line(const char *in, int len)
{
while (len > 0) {
uuencode_b64_3bytes(in, len < 3 ? len : 3);
in += 3;
len -= 3;
};
xprintf("\n");
}
static void uuencode_b64(int fd, const char *name)
{
int len;
char buf[(76/4)*3];
xprintf("begin-base64 744 %s\n",name);
do {
len = xread(fd, buf, sizeof(buf));
uuencode_b64_line(buf, len);
} while (len > 0);
xprintf("====\n");
}
static void uuencode_uu_3bytes(const char *in)
{
unsigned int i, x = 0;
for (i = 0; i <= 2; i++) x |= (in[i] & 0x0ff) << (8*(2-i));
for (i = 0; i <= 3; i++) xputc(32 + ((x >> (6*(3-i))) & 0x3f));
}
static void uuencode_uu_line(char *in, int len)
{
if (len > 0) {
int i;
xputc(len+32);
for (i = 0; i < len; i += 3) uuencode_uu_3bytes(in+i);
}
xprintf("\n");
}
static void uuencode_uu(int fd, const char *name)
{
int len;
char buf[45];
xprintf("begin 744 %s\n",name);
do {
len = xread(fd, buf, 45);
uuencode_uu_line(buf, len);
} while (len > 0);
xprintf("end\n");
}
void uuencode_main(void)
{
char *p, *name = toys.optargs[0];
int i, fd = 0;
// base64 table
p = toybuf;
for (i = 'A'; i != ':'; i++) {
if (i == 'Z'+1) i = 'a';
if (i == 'z'+1) i = '0';
*(p++) = i;
}
*(p++) = '+';
*(p++) = '/';
if (toys.optc == 2) {
fd = xopen(toys.optargs[0], O_RDONLY); // dies if error
name = toys.optargs[1];
}
if (toys.optflags & FLAG_m) uuencode_b64(fd, name);
else uuencode_uu(fd, name);
}
|
