1 : /*
2 : +----------------------------------------------------------------------+
3 : | PHP Version 5 |
4 : +----------------------------------------------------------------------+
5 : | Copyright (c) 1997-2007 The PHP Group |
6 : +----------------------------------------------------------------------+
7 : | This source file is subject to version 3.01 of the PHP license, |
8 : | that is bundled with this package in the file LICENSE, and is |
9 : | available through the world-wide-web at the following url: |
10 : | http://www.php.net/license/3_01.txt |
11 : | If you did not receive a copy of the PHP license and are unable to |
12 : | obtain it through the world-wide-web, please send a note to |
13 : | license@php.net so we can mail you a copy immediately. |
14 : +----------------------------------------------------------------------+
15 : | Author: Ilia Alshanetsky <ilia@php.net> |
16 : +----------------------------------------------------------------------+
17 : */
18 :
19 : /* $Id: uuencode.c,v 1.5.2.1.2.4 2007/03/12 20:55:15 tony2001 Exp $ */
20 :
21 : /*
22 : * Portions of this code are based on Berkeley's uuencode/uudecode
23 : * implementation.
24 : *
25 : * Copyright (c) 1983, 1993
26 : * The Regents of the University of California. All rights reserved.
27 : *
28 : * Redistribution and use in source and binary forms, with or without
29 : * modification, are permitted provided that the following conditions
30 : * are met:
31 : * 1. Redistributions of source code must retain the above copyright
32 : * notice, this list of conditions and the following disclaimer.
33 : * 2. Redistributions in binary form must reproduce the above copyright
34 : * notice, this list of conditions and the following disclaimer in the
35 : * documentation and/or other materials provided with the distribution.
36 : * 3. All advertising materials mentioning features or use of this software
37 : * must display the following acknowledgement:
38 : * This product includes software developed by the University of
39 : * California, Berkeley and its contributors.
40 : * 4. Neither the name of the University nor the names of its contributors
41 : * may be used to endorse or promote products derived from this software
42 : * without specific prior written permission.
43 : *
44 : * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
45 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
47 : * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
48 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
49 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
50 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
51 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
52 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
53 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
54 : * SUCH DAMAGE.
55 : */
56 :
57 : #include <math.h>
58 :
59 : #include "php.h"
60 : #include "php_uuencode.h"
61 :
62 : #define PHP_UU_ENC(c) ((c) ? ((c) & 077) + ' ' : '`')
63 : #define PHP_UU_ENC_C2(c) PHP_UU_ENC(((*(c) << 4) & 060) | ((*((c) + 1) >> 4) & 017))
64 : #define PHP_UU_ENC_C3(c) PHP_UU_ENC(((*(c + 1) << 2) & 074) | ((*((c) + 2) >> 6) & 03))
65 :
66 : #define PHP_UU_DEC(c) (((c) - ' ') & 077)
67 :
68 : PHPAPI int php_uuencode(char *src, int src_len, char **dest) /* {{{ */
69 0 : {
70 0 : int len = 45;
71 : char *p, *s, *e, *ee;
72 :
73 : /* encoded length is ~ 38% greater then the original */
74 0 : p = *dest = safe_emalloc(ceil(src_len * 1.38), 1, 46);
75 0 : s = src;
76 0 : e = src + src_len;
77 :
78 0 : while ((s + 3) < e) {
79 0 : ee = s + len;
80 0 : if (ee > e) {
81 0 : ee = e;
82 0 : len = ee - s;
83 0 : if (len % 3) {
84 0 : ee = s + (int) (floor(len / 3) * 3);
85 : }
86 : }
87 0 : *p++ = PHP_UU_ENC(len);
88 :
89 0 : while (s < ee) {
90 0 : *p++ = PHP_UU_ENC(*s >> 2);
91 0 : *p++ = PHP_UU_ENC_C2(s);
92 0 : *p++ = PHP_UU_ENC_C3(s);
93 0 : *p++ = PHP_UU_ENC(*(s + 2) & 077);
94 :
95 0 : s += 3;
96 : }
97 :
98 0 : if (len == 45) {
99 0 : *p++ = '\n';
100 : }
101 : }
102 :
103 0 : if (s < e) {
104 0 : if (len == 45) {
105 0 : *p++ = PHP_UU_ENC(e - s);
106 0 : len = 0;
107 : }
108 :
109 0 : *p++ = PHP_UU_ENC(*s >> 2);
110 0 : *p++ = PHP_UU_ENC_C2(s);
111 0 : *p++ = ((e - s) > 1) ? PHP_UU_ENC_C3(s) : PHP_UU_ENC('\0');
112 0 : *p++ = ((e - s) > 2) ? PHP_UU_ENC(*(s + 2) & 077) : PHP_UU_ENC('\0');
113 : }
114 :
115 0 : if (len < 45) {
116 0 : *p++ = '\n';
117 : }
118 :
119 0 : *p++ = PHP_UU_ENC('\0');
120 0 : *p++ = '\n';
121 0 : *p = '\0';
122 :
123 0 : return (p - *dest);
124 : }
125 : /* }}} */
126 :
127 : PHPAPI int php_uudecode(char *src, int src_len, char **dest) /* {{{ */
128 0 : {
129 0 : int len, total_len=0;
130 : char *s, *e, *p, *ee;
131 :
132 0 : p = *dest = safe_emalloc(ceil(src_len * 0.75), 1, 1);
133 0 : s = src;
134 0 : e = src + src_len;
135 :
136 0 : while (s < e) {
137 0 : if ((len = PHP_UU_DEC(*s++)) <= 0) {
138 0 : break;
139 : }
140 : /* sanity check */
141 0 : if (len > src_len) {
142 0 : goto err;
143 : }
144 :
145 0 : total_len += len;
146 :
147 0 : ee = s + (len == 45 ? 60 : (int) floor(len * 1.33));
148 : /* sanity check */
149 0 : if (ee > e) {
150 0 : goto err;
151 : }
152 :
153 0 : while (s < ee) {
154 0 : *p++ = PHP_UU_DEC(*s) << 2 | PHP_UU_DEC(*(s + 1)) >> 4;
155 0 : *p++ = PHP_UU_DEC(*(s + 1)) << 4 | PHP_UU_DEC(*(s + 2)) >> 2;
156 0 : *p++ = PHP_UU_DEC(*(s + 2)) << 6 | PHP_UU_DEC(*(s + 3));
157 0 : s += 4;
158 : }
159 :
160 0 : if (len < 45) {
161 0 : break;
162 : }
163 :
164 : /* skip \n */
165 0 : s++;
166 : }
167 :
168 0 : if ((len = total_len > (p - *dest))) {
169 0 : *p++ = PHP_UU_DEC(*s) << 2 | PHP_UU_DEC(*(s + 1)) >> 4;
170 0 : if (len > 1) {
171 0 : *p++ = PHP_UU_DEC(*(s + 1)) << 4 | PHP_UU_DEC(*(s + 2)) >> 2;
172 0 : if (len > 2) {
173 0 : *p++ = PHP_UU_DEC(*(s + 2)) << 6 | PHP_UU_DEC(*(s + 3));
174 : }
175 : }
176 : }
177 :
178 0 : *(*dest + total_len) = '\0';
179 :
180 0 : return total_len;
181 :
182 0 : err:
183 0 : efree(*dest);
184 0 : return -1;
185 : }
186 : /* }}} */
187 :
188 : /* {{{ proto string convert_uuencode(string data)
189 : uuencode a string */
190 : PHP_FUNCTION(convert_uuencode)
191 0 : {
192 : char *src, *dst;
193 : int src_len, dst_len;
194 :
195 0 : if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &src, &src_len) == FAILURE || src_len < 1) {
196 0 : RETURN_FALSE;
197 : }
198 :
199 0 : dst_len = php_uuencode(src, src_len, &dst);
200 :
201 0 : RETURN_STRINGL(dst, dst_len, 0);
202 : }
203 : /* }}} */
204 :
205 : /* {{{ proto string convert_uudecode(string data)
206 : decode a uuencoded string */
207 : PHP_FUNCTION(convert_uudecode)
208 0 : {
209 : char *src, *dst;
210 : int src_len, dst_len;
211 :
212 0 : if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &src, &src_len) == FAILURE || src_len < 1) {
213 0 : RETURN_FALSE;
214 : }
215 :
216 0 : dst_len = php_uudecode(src, src_len, &dst);
217 0 : if (dst_len < 0) {
218 0 : php_error_docref(NULL TSRMLS_CC, E_WARNING, "The given parameter is not a valid uuencoded string.");
219 0 : RETURN_FALSE;
220 : }
221 :
222 0 : RETURN_STRINGL(dst, dst_len, 0);
223 : }
224 : /* }}} */
225 :
226 : /*
227 : * Local variables:
228 : * tab-width: 4
229 : * c-basic-offset: 4
230 : * End:
231 : * vim600: noet sw=4 ts=4 fdm=marker
232 : * vim<600: noet sw=4 ts=4
233 : */
|
