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