Annotation of embedaddon/php/ext/standard/uuencode.c, revision 1.1.1.2
1.1 misho 1: /*
2: +----------------------------------------------------------------------+
3: | PHP Version 5 |
4: +----------------------------------------------------------------------+
5: | Copyright (c) 1997-2012 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:
1.1.1.2 ! misho 19: /* $Id$ */
1.1 misho 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: {
70: int len = 45;
71: char *p, *s, *e, *ee;
72:
73: /* encoded length is ~ 38% greater then the original */
74: p = *dest = safe_emalloc((size_t) ceil(src_len * 1.38), 1, 46);
75: s = src;
76: e = src + src_len;
77:
78: while ((s + 3) < e) {
79: ee = s + len;
80: if (ee > e) {
81: ee = e;
82: len = ee - s;
83: if (len % 3) {
84: ee = s + (int) (floor(len / 3) * 3);
85: }
86: }
87: *p++ = PHP_UU_ENC(len);
88:
89: while (s < ee) {
90: *p++ = PHP_UU_ENC(*s >> 2);
91: *p++ = PHP_UU_ENC_C2(s);
92: *p++ = PHP_UU_ENC_C3(s);
93: *p++ = PHP_UU_ENC(*(s + 2) & 077);
94:
95: s += 3;
96: }
97:
98: if (len == 45) {
99: *p++ = '\n';
100: }
101: }
102:
103: if (s < e) {
104: if (len == 45) {
105: *p++ = PHP_UU_ENC(e - s);
106: len = 0;
107: }
108:
109: *p++ = PHP_UU_ENC(*s >> 2);
110: *p++ = PHP_UU_ENC_C2(s);
111: *p++ = ((e - s) > 1) ? PHP_UU_ENC_C3(s) : PHP_UU_ENC('\0');
112: *p++ = ((e - s) > 2) ? PHP_UU_ENC(*(s + 2) & 077) : PHP_UU_ENC('\0');
113: }
114:
115: if (len < 45) {
116: *p++ = '\n';
117: }
118:
119: *p++ = PHP_UU_ENC('\0');
120: *p++ = '\n';
121: *p = '\0';
122:
123: return (p - *dest);
124: }
125: /* }}} */
126:
127: PHPAPI int php_uudecode(char *src, int src_len, char **dest) /* {{{ */
128: {
129: int len, total_len=0;
130: char *s, *e, *p, *ee;
131:
132: p = *dest = safe_emalloc((size_t) ceil(src_len * 0.75), 1, 1);
133: s = src;
134: e = src + src_len;
135:
136: while (s < e) {
137: if ((len = PHP_UU_DEC(*s++)) <= 0) {
138: break;
139: }
140: /* sanity check */
141: if (len > src_len) {
142: goto err;
143: }
144:
145: total_len += len;
146:
147: ee = s + (len == 45 ? 60 : (int) floor(len * 1.33));
148: /* sanity check */
149: if (ee > e) {
150: goto err;
151: }
152:
153: while (s < ee) {
154: *p++ = PHP_UU_DEC(*s) << 2 | PHP_UU_DEC(*(s + 1)) >> 4;
155: *p++ = PHP_UU_DEC(*(s + 1)) << 4 | PHP_UU_DEC(*(s + 2)) >> 2;
156: *p++ = PHP_UU_DEC(*(s + 2)) << 6 | PHP_UU_DEC(*(s + 3));
157: s += 4;
158: }
159:
160: if (len < 45) {
161: break;
162: }
163:
164: /* skip \n */
165: s++;
166: }
167:
168: if ((len = total_len > (p - *dest))) {
169: *p++ = PHP_UU_DEC(*s) << 2 | PHP_UU_DEC(*(s + 1)) >> 4;
170: if (len > 1) {
171: *p++ = PHP_UU_DEC(*(s + 1)) << 4 | PHP_UU_DEC(*(s + 2)) >> 2;
172: if (len > 2) {
173: *p++ = PHP_UU_DEC(*(s + 2)) << 6 | PHP_UU_DEC(*(s + 3));
174: }
175: }
176: }
177:
178: *(*dest + total_len) = '\0';
179:
180: return total_len;
181:
182: err:
183: efree(*dest);
184: return -1;
185: }
186: /* }}} */
187:
188: /* {{{ proto string convert_uuencode(string data)
189: uuencode a string */
190: PHP_FUNCTION(convert_uuencode)
191: {
192: char *src, *dst;
193: int src_len, dst_len;
194:
195: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &src, &src_len) == FAILURE || src_len < 1) {
196: RETURN_FALSE;
197: }
198:
199: dst_len = php_uuencode(src, src_len, &dst);
200:
201: 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: {
209: char *src, *dst;
210: int src_len, dst_len;
211:
212: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &src, &src_len) == FAILURE || src_len < 1) {
213: RETURN_FALSE;
214: }
215:
216: dst_len = php_uudecode(src, src_len, &dst);
217: if (dst_len < 0) {
218: php_error_docref(NULL TSRMLS_CC, E_WARNING, "The given parameter is not a valid uuencoded string");
219: RETURN_FALSE;
220: }
221:
222: 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: */
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