Contents of /trunk/mkinitrd-magellan/busybox/libbb/uuencode.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1866 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Copyright 2006 Rob Landley <rob@landley.net> |
4 | * |
5 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
6 | */ |
7 | |
8 | #include "libbb.h" |
9 | |
10 | /* Conversion table. for base 64 */ |
11 | const char bb_uuenc_tbl_base64[65] = { |
12 | 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', |
13 | 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', |
14 | 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', |
15 | 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', |
16 | 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', |
17 | 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', |
18 | 'w', 'x', 'y', 'z', '0', '1', '2', '3', |
19 | '4', '5', '6', '7', '8', '9', '+', '/', |
20 | '=' /* termination character */ |
21 | }; |
22 | |
23 | const char bb_uuenc_tbl_std[65] = { |
24 | '`', '!', '"', '#', '$', '%', '&', '\'', |
25 | '(', ')', '*', '+', ',', '-', '.', '/', |
26 | '0', '1', '2', '3', '4', '5', '6', '7', |
27 | '8', '9', ':', ';', '<', '=', '>', '?', |
28 | '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', |
29 | 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', |
30 | 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', |
31 | 'X', 'Y', 'Z', '[', '\\', ']', '^', '_', |
32 | '`' /* termination character */ |
33 | }; |
34 | |
35 | /* |
36 | * Encode the string S of length LENGTH to base64 format and place it |
37 | * to STORE. STORE will be 0-terminated, and must point to a writable |
38 | * buffer of at least 1+BASE64_LENGTH(length) bytes. |
39 | * where BASE64_LENGTH(len) = (4 * ((LENGTH + 2) / 3)) |
40 | */ |
41 | void bb_uuencode(const unsigned char *s, char *store, const int length, const char *tbl) |
42 | { |
43 | int i; |
44 | char *p = store; |
45 | |
46 | /* Transform the 3x8 bits to 4x6 bits, as required by base64. */ |
47 | for (i = 0; i < length; i += 3) { |
48 | *p++ = tbl[s[0] >> 2]; |
49 | *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)]; |
50 | *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)]; |
51 | *p++ = tbl[s[2] & 0x3f]; |
52 | s += 3; |
53 | } |
54 | /* Pad the result if necessary... */ |
55 | if (i == length + 1) { |
56 | *(p - 1) = tbl[64]; |
57 | } |
58 | else if (i == length + 2) { |
59 | *(p - 1) = *(p - 2) = tbl[64]; |
60 | } |
61 | /* ...and zero-terminate it. */ |
62 | *p = '\0'; |
63 | } |