1 /* uuencode.c - uuencode / base64 encode
2 *
3 * Copyright 2013 Erich Plondke <[email protected]>
4 *
5 * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/uuencode.html
6
7 USE_UUENCODE(NEWTOY(uuencode, "<1>2m", TOYFLAG_USR|TOYFLAG_BIN))
8
9 config UUENCODE
10 bool "uuencode"
11 default y
12 help
13 usage: uuencode [-m] [INFILE] ENCODE_FILENAME
14
15 Uuencode stdin (or INFILE) to stdout, with ENCODE_FILENAME in the output.
16
17 -m Base64
18 */
19
20 #define FOR_uuencode
21 #include "toys.h"
22
uuencode_main(void)23 void uuencode_main(void)
24 {
25 char *name = toys.optargs[toys.optc-1], buf[(76/4)*3];
26
27 int i, fd = 0;
28
29 if (toys.optc > 1) fd = xopenro(toys.optargs[0]);
30
31 base64_init(toybuf);
32
33 xprintf("begin%s 744 %s\n", FLAG(m) ? "-base64" : "", name);
34 for (;;) {
35 char *in;
36
37 if (!(i = xread(fd, buf, FLAG(m) ? sizeof(buf) : 45))) break;
38
39 if (!FLAG(m)) xputc(i+32);
40 in = buf;
41
42 for (in = buf; in-buf < i; ) {
43 int j, x, bytes = i - (in-buf);
44
45 if (bytes > 3) bytes = 3;
46
47 for (j = x = 0; j<4; j++) {
48 int out;
49
50 if (j < bytes) x |= (*(in++) & 0x0ff) << (8*(2-j));
51 out = (x>>((3-j)*6)) & 0x3f;
52 xputc(FLAG(m) ? (j > bytes ? '=' : toybuf[out])
53 : (out ? out + 0x20 : 0x60));
54 }
55 }
56 xputc('\n');
57 }
58 xputs(FLAG(m) ? "====" : "end");
59 }
60