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|
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2004 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_0.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Ilia Alshanetsky <ilia@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
/*
* Portions of this code are based on Berkeley's uuencode/uudecode
* implementation.
*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <math.h>
#include "php.h"
#include "php_uuencode.h"
#define PHP_UU_ENC(c) ((c) ? ((c) & 077) + ' ' : '`')
#define PHP_UU_ENC_C2(c) PHP_UU_ENC(((*(c) << 4) & 060) | ((*((c) + 1) >> 4) & 017))
#define PHP_UU_ENC_C3(c) PHP_UU_ENC(((*(c + 1) << 2) & 074) | ((*((c) + 2) >> 6) & 03))
#define PHP_UU_DEC(c) (((c) - ' ') & 077)
PHPAPI int php_uuencode(char *src, int src_len, char **dest)
{
int len = 45;
char *p, *s, *e, *ee;
/* encoded length is ~ 38% greater then the original */
p = *dest = emalloc((ceil(src_len * 1.38) + 45 + 1));
s = src;
e = src + src_len;
while ((s + 3) < e) {
ee = s + len;
if (ee > e) {
ee = e;
len = ee - s;
if (len % 3) {
ee = s + (int) (floor(len / 3) * 3);
}
}
*p++ = PHP_UU_ENC(len);
while (s < ee) {
*p++ = PHP_UU_ENC(*s >> 2);
*p++ = PHP_UU_ENC_C2(s);
*p++ = PHP_UU_ENC_C3(s);
*p++ = PHP_UU_ENC(*(s + 2) & 077);
s += 3;
}
if (len == 45) {
*p++ = '\n';
}
}
if (s < e) {
if (len == 45) {
*p++ = PHP_UU_ENC(e - s);
len = 0;
}
*p++ = PHP_UU_ENC(*s >> 2);
*p++ = PHP_UU_ENC_C2(s);
*p++ = ((e - s) > 1) ? PHP_UU_ENC_C3(s) : PHP_UU_ENC('\0');
*p++ = ((e - s) > 2) ? PHP_UU_ENC(*(s + 2) & 077) : PHP_UU_ENC('\0');
}
if (len < 45) {
*p++ = '\n';
}
*p++ = PHP_UU_ENC('\0');
*p++ = '\n';
*p = '\0';
return (p - *dest);
}
PHPAPI int php_uudecode(char *src, int src_len, char **dest)
{
int len, total_len=0;
char *s, *e, *p, *ee;
p = *dest = emalloc(ceil(src_len * 0.75) + 1);
s = src;
e = src + src_len;
while (s < e) {
if ((len = PHP_UU_DEC(*s++)) <= 0) {
break;
}
/* sanity check */
if (len > src_len) {
goto err;
}
total_len += len;
ee = s + (len == 45 ? 60 : (int) floor(len * 1.33));
/* sanity check */
if (ee > e) {
goto err;
}
while (s < ee) {
*p++ = PHP_UU_DEC(*s) << 2 | PHP_UU_DEC(*(s + 1)) >> 4;
*p++ = PHP_UU_DEC(*(s + 1)) << 4 | PHP_UU_DEC(*(s + 2)) >> 2;
*p++ = PHP_UU_DEC(*(s + 2)) << 6 | PHP_UU_DEC(*(s + 3));
s += 4;
}
if (len < 45) {
break;
}
/* skip \n */
s++;
}
if ((len = total_len > (p - *dest))) {
*p++ = PHP_UU_DEC(*s) << 2 | PHP_UU_DEC(*(s + 1)) >> 4;
if (len > 1) {
*p++ = PHP_UU_DEC(*(s + 1)) << 4 | PHP_UU_DEC(*(s + 2)) >> 2;
if (len > 2) {
*p++ = PHP_UU_DEC(*(s + 2)) << 6 | PHP_UU_DEC(*(s + 3));
}
}
}
*(*dest + total_len) = '\0';
return total_len;
err:
efree(*dest);
return -1;
}
/* {{{ proto string uuencode(string data)
uuencode a string */
PHP_FUNCTION(convert_uuencode)
{
char *src, *dst;
int src_len, dst_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &src, &src_len) == FAILURE || src_len < 1) {
RETURN_FALSE;
}
dst_len = php_uuencode(src, src_len, &dst);
RETURN_STRINGL(dst, dst_len, 0);
}
/* }}} */
/* {{{ proto string uudecode(string data)
decode a uuencoded string */
PHP_FUNCTION(convert_uudecode)
{
char *src, *dst;
int src_len, dst_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &src, &src_len) == FAILURE || src_len < 1) {
RETURN_FALSE;
}
dst_len = php_uudecode(src, src_len, &dst);
if (dst_len < 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "The given parameter is not a valid uuencoded string.");
RETURN_FALSE;
}
RETURN_STRINGL(dst, dst_len, 0);
}
/* }}} */
|
