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Parent Directory Parent Directory | Revision <a href="/cvs/aolserver/aolserver/nsd/log.c#A_Log">Log</a> Revision <a href="/cvs/aolserver/aolserver/nsd/log.c#A_Log">Log</a>
Revision 1.4 - (show annotations) (download) (as text)
Tue Jul 5 18:37:47 2011 UTC (6 years, 6 months ago) by gneumann
Branch: MAIN
CVS Tags: aolserver_v45_r2_rc0, HEAD
Branch point for: aolserver_v45_r2
Changes since 1.3: +4 -14 lines
File MIME type: text/x-chdr 
- reverting escaped commit
1 /*
2 * The contents of this file are subject to the AOLserver Public License
3 * Version 1.1 (the "License"); you may not use this file except in
4 * compliance with the License. You may obtain a copy of the License at
5 * http://aolserver.com/.
6 *
7 * Software distributed under the License is distributed on an "AS IS"
8 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
9 * the License for the specific language governing rights and limitations
10 * under the License.
11 *
12 * The Original Code is AOLserver Code and related documentation
13 * distributed by AOL.
14 *
15 * The Initial Developer of the Original Code is America Online,
16 * Inc. Portions created by AOL are Copyright (C) 1999 America Online,
17 * Inc. All Rights Reserved.
18 *
19 * Alternatively, the contents of this file may be used under the terms
20 * of the GNU General Public License (the "GPL"), in which case the
21 * provisions of GPL are applicable instead of those above. If you wish
22 * to allow use of your version of this file only under the terms of the
23 * GPL and not to allow others to use your version of this file under the
24 * License, indicate your decision by deleting the provisions above and
25 * replace them with the notice and other provisions required by the GPL.
26 * If you do not delete the provisions above, a recipient may use your
27 * version of this file under either the License or the GPL.
28 */
29
30 /*
31 * uuencode.c --
32 *
33 * Uuencoding and decoding routines which map 8-bit binary bytes
34 * into 6-bit ascii characters.
35 *
36 */
37
38 static const char *RCSID = "@(#) $Header: /cvsroot-fuse/aolserver/aolserver/nsd/uuencode.c,v 1.4 2011/07/05 18:37:47 gneumann Exp $, compiled: " __DATE__ " " __TIME__;
39
40 #include "nsd.h"
41
42 /*
43 * The following array specify the output ascii character for each
44 * of the 64 6-bit characters.
45 */
46
47 static char six2pr[64] = {
48 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
49 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
50 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
51 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
52 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
53 };
54
55 /*
56 * The following array maps all 256 8-bit ascii characters to
57 * either the corresponding 6-bit value or -1 for invalid character.
58 */
59
60 static int pr2six[256] = {
61 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
62 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
63 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
64 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
65 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
66 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
67 -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
68 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
69 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
70 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
71 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
72 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
73 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
74 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
75 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
76 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
77 };
78
79 #define ENC(c) (six2pr[(c)])
80 #define DEC(c) ((unsigned char) pr2six[(int)(c)])
81
82
83 /*
84 *----------------------------------------------------------------------
85 *
86 * <a href="/cvs/aolserver/aolserver/nsd/uuencode.c#A_Ns_HtuuEncode">Ns_HtuuEncode</a> --
87 *
88 * Encode a string.
89 *
90 * Results:
91 * Number of bytes placed in output.
92 *
93 * Side effects:
94 * Encoded characters are placed in output which must be
95 * large enough for the result, i.e., (1 + (len * 4) / 3)
96 * bytes.
97 *
98 *----------------------------------------------------------------------
99 */
100
101 int
102 <a href="/cvs/aolserver/aolserver/nsd/uuencode.c#A_Ns_HtuuEncode">Ns_HtuuEncode</a>(unsigned char *input, unsigned int len, char *output)
103 {
104 register unsigned char *p, *q;
105 register int n;
106
107 /*
108 * Convert every three input bytes into four output
109 * characters.
110 */
111
112 p = input;
113 q = output;
114 for (n = len / 3; n > 0; --n) {
115 *q++ = ENC(p[0] >> 2);
116 *q++ = ENC(((p[0] << 4) & 060) | ((p[1] >> 4) & 017));
117 *q++ = ENC(((p[1] << 2) & 074) | ((p[2] >> 6) & 03));
118 *q++ = ENC(p[2] & 077);
119 p += 3;
120 }
121
122 /*
123 * Convert and pad any remaining bytes.
124 */
125
126 n = len % 3;
127 if (n > 0) {
128 *q++ = ENC(p[0] >> 2);
129 if (n == 1) {
130 *q++ = ENC((p[0] << 4) & 060);
131 *q++ = '=';
132 } else {
133 *q++ = ENC(((p[0] << 4) & 060) | ((p[1] >> 4) & 017));
134 *q++ = ENC((p[1] << 2) & 074);
135 }
136 *q++ = '=';
137 }
138 *q = '\0';
139 return (q - (unsigned char *) output);
140 }
141
142
143 /*
144 *----------------------------------------------------------------------
145 *
146 * <a href="/cvs/aolserver/aolserver/nsd/uuencode.c#A_Ns_HtuuDecode">Ns_HtuuDecode</a> --
147 *
148 * Decode a string.
149 *
150 * Results:
151 * Number of binary bytes decoded.
152 *
153 * Side effects:
154 * Decoded characters are placed in output which must be
155 * large enough for the result, i.e., (3 + (len * 3) / 4)
156 * bytes.
157 *
158 *----------------------------------------------------------------------
159 */
160
161 int
162 <a href="/cvs/aolserver/aolserver/nsd/uuencode.c#A_Ns_HtuuDecode">Ns_HtuuDecode</a>(char *input, unsigned char *output, int outputlen)
163 {
164 register unsigned char *p, *q;
165 register int len, n;
166
167
168 /*
169 * Skip leading space, if any.
170 */
171
172 while (*input == ' ' || *input == '\t') {
173 ++input;
174 }
175
176 /*
177 * Determine the maximum length of output bytes.
178 */
179
180 p = input;
181 while (pr2six[(int)(*p)] >= 0) {
182 ++p;
183 }
184 len = p - (unsigned char *) input;
185
186 /*
187 * Decode every four input bytes.
188 */
189
190 p = input;
191 q = output;
192 for (n = len / 4; n > 0; --n) {
193 *q++ = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
194 *q++ = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
195 *q++ = DEC(p[2]) << 6 | DEC(p[3]);
196 p += 4;
197 }
198
199 /*
200 * Decode remaining 2 or 3 bytes.
201 */
202
203 n = len % 4;
204 if (n > 1) {
205 *q++ = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
206 }
207 if (n > 2) {
208 *q++ = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
209 }
210 if ((q - output) < outputlen) {
211 *q = '\0';
212 }
213 return (q - output);
214 }

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