Annotation of embedaddon/php/ext/standard/uuencode.c, revision 1.1
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:
! 19: /* $Id: uuencode.c 321634 2012-01-01 13:15:04Z felipe $ */
! 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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