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1.1 misho 1: /*
2: +----------------------------------------------------------------------+
3: | PHP Version 5 |
4: +----------------------------------------------------------------------+
1.1.1.3 ! misho 5: | Copyright (c) 1997-2013 The PHP Group |
1.1 misho 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: Kirill Maximov <kir@actimind.com> |
16: +----------------------------------------------------------------------+
17: */
18:
1.1.1.2 misho 19: /* $Id$ */
1.1 misho 20:
21: #include <stdlib.h>
22:
23: #ifdef HAVE_UNISTD_H
24: #include <unistd.h>
25: #endif
26: #include <string.h>
27: #include <errno.h>
28:
29: #include "php.h"
30: #include "quot_print.h"
31:
32: #include <stdio.h>
33:
34: /*
35: * Converting HEX char to INT value
36: */
37: static char php_hex2int(int c) /* {{{ */
38: {
39: if (isdigit(c)) {
40: return c - '0';
41: }
42: else if (c >= 'A' && c <= 'F') {
43: return c - 'A' + 10;
44: }
45: else if (c >= 'a' && c <= 'f') {
46: return c - 'a' + 10;
47: }
48: else {
49: return -1;
50: }
51: }
52: /* }}} */
53:
54: PHPAPI unsigned char *php_quot_print_decode(const unsigned char *str, size_t length, size_t *ret_length, int replace_us_by_ws) /* {{{ */
55: {
56: register unsigned int i;
57: register unsigned const char *p1;
58: register unsigned char *p2;
59: register unsigned int h_nbl, l_nbl;
60:
61: size_t decoded_len, buf_size;
62: unsigned char *retval;
63:
64: static unsigned int hexval_tbl[256] = {
65: 64, 64, 64, 64, 64, 64, 64, 64, 64, 32, 16, 64, 64, 16, 64, 64,
66: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
67: 32, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
68: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 64, 64, 64, 64, 64, 64,
69: 64, 10, 11, 12, 13, 14, 15, 64, 64, 64, 64, 64, 64, 64, 64, 64,
70: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
71: 64, 10, 11, 12, 13, 14, 15, 64, 64, 64, 64, 64, 64, 64, 64, 64,
72: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
73: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
74: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
75: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
76: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
77: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
78: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
79: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
80: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64
81: };
82:
83: if (replace_us_by_ws) {
84: replace_us_by_ws = '_';
85: }
86:
87: i = length, p1 = str; buf_size = length;
88:
89: while (i > 1 && *p1 != '\0') {
90: if (*p1 == '=') {
91: buf_size -= 2;
92: p1++;
93: i--;
94: }
95: p1++;
96: i--;
97: }
98:
99: retval = emalloc(buf_size + 1);
100: i = length; p1 = str; p2 = retval;
101: decoded_len = 0;
102:
103: while (i > 0 && *p1 != '\0') {
104: if (*p1 == '=') {
105: i--, p1++;
106: if (i == 0 || *p1 == '\0') {
107: break;
108: }
109: h_nbl = hexval_tbl[*p1];
110: if (h_nbl < 16) {
111: /* next char should be a hexadecimal digit */
112: if ((--i) == 0 || (l_nbl = hexval_tbl[*(++p1)]) >= 16) {
113: efree(retval);
114: return NULL;
115: }
116: *(p2++) = (h_nbl << 4) | l_nbl, decoded_len++;
117: i--, p1++;
118: } else if (h_nbl < 64) {
119: /* soft line break */
120: while (h_nbl == 32) {
121: if (--i == 0 || (h_nbl = hexval_tbl[*(++p1)]) == 64) {
122: efree(retval);
123: return NULL;
124: }
125: }
126: if (p1[0] == '\r' && i >= 2 && p1[1] == '\n') {
127: i--, p1++;
128: }
129: i--, p1++;
130: } else {
131: efree(retval);
132: return NULL;
133: }
134: } else {
135: *(p2++) = (replace_us_by_ws == *p1 ? '\x20': *p1);
136: i--, p1++, decoded_len++;
137: }
138: }
139:
140: *p2 = '\0';
141: *ret_length = decoded_len;
142: return retval;
143: }
144: /* }}} */
145:
146: #define PHP_QPRINT_MAXL 75
147:
148: PHPAPI unsigned char *php_quot_print_encode(const unsigned char *str, size_t length, size_t *ret_length) /* {{{ */
149: {
150: unsigned long lp = 0;
151: unsigned char c, *ret, *d;
152: char *hex = "0123456789ABCDEF";
153:
1.1.1.3 ! misho 154: ret = safe_emalloc(3, length + (((3 * length)/(PHP_QPRINT_MAXL-9)) + 1), 1);
1.1 misho 155: d = ret;
156:
157: while (length--) {
158: if (((c = *str++) == '\015') && (*str == '\012') && length > 0) {
159: *d++ = '\015';
160: *d++ = *str++;
161: length--;
162: lp = 0;
163: } else {
164: if (iscntrl (c) || (c == 0x7f) || (c & 0x80) || (c == '=') || ((c == ' ') && (*str == '\015'))) {
1.1.1.3 ! misho 165: if ((((lp+= 3) > PHP_QPRINT_MAXL) && (c <= 0x7f))
! 166: || ((c > 0x7f) && (c <= 0xdf) && ((lp + 3) > PHP_QPRINT_MAXL))
! 167: || ((c > 0xdf) && (c <= 0xef) && ((lp + 6) > PHP_QPRINT_MAXL))
! 168: || ((c > 0xef) && (c <= 0xf4) && ((lp + 9) > PHP_QPRINT_MAXL))) {
1.1 misho 169: *d++ = '=';
170: *d++ = '\015';
171: *d++ = '\012';
172: lp = 3;
173: }
174: *d++ = '=';
175: *d++ = hex[c >> 4];
176: *d++ = hex[c & 0xf];
177: } else {
178: if ((++lp) > PHP_QPRINT_MAXL) {
179: *d++ = '=';
180: *d++ = '\015';
181: *d++ = '\012';
182: lp = 1;
183: }
184: *d++ = c;
185: }
186: }
187: }
188: *d = '\0';
189: *ret_length = d - ret;
190:
191: ret = erealloc(ret, *ret_length + 1);
192: return ret;
193: }
194: /* }}} */
195:
196: /*
197: *
198: * Decoding Quoted-printable string.
199: *
200: */
201: /* {{{ proto string quoted_printable_decode(string str)
202: Convert a quoted-printable string to an 8 bit string */
203: PHP_FUNCTION(quoted_printable_decode)
204: {
205: char *arg1, *str_in, *str_out;
206: int arg1_len, i = 0, j = 0, k;
207:
208: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &arg1, &arg1_len) == FAILURE) {
209: return;
210: }
211:
212: if (arg1_len == 0) {
213: /* shortcut */
214: RETURN_EMPTY_STRING();
215: }
216:
217: str_in = arg1;
218: str_out = emalloc(arg1_len + 1);
219: while (str_in[i]) {
220: switch (str_in[i]) {
221: case '=':
222: if (str_in[i + 1] && str_in[i + 2] &&
223: isxdigit((int) str_in[i + 1]) &&
224: isxdigit((int) str_in[i + 2]))
225: {
226: str_out[j++] = (php_hex2int((int) str_in[i + 1]) << 4)
227: + php_hex2int((int) str_in[i + 2]);
228: i += 3;
229: } else /* check for soft line break according to RFC 2045*/ {
230: k = 1;
231: while (str_in[i + k] && ((str_in[i + k] == 32) || (str_in[i + k] == 9))) {
232: /* Possibly, skip spaces/tabs at the end of line */
233: k++;
234: }
235: if (!str_in[i + k]) {
236: /* End of line reached */
237: i += k;
238: }
239: else if ((str_in[i + k] == 13) && (str_in[i + k + 1] == 10)) {
240: /* CRLF */
241: i += k + 2;
242: }
243: else if ((str_in[i + k] == 13) || (str_in[i + k] == 10)) {
244: /* CR or LF */
245: i += k + 1;
246: }
247: else {
248: str_out[j++] = str_in[i++];
249: }
250: }
251: break;
252: default:
253: str_out[j++] = str_in[i++];
254: }
255: }
256: str_out[j] = '\0';
257:
258: RETVAL_STRINGL(str_out, j, 0);
259: }
260: /* }}} */
261:
262: /* {{{ proto string quoted_printable_encode(string str) */
263: PHP_FUNCTION(quoted_printable_encode)
264: {
265: char *str, *new_str;
266: int str_len;
267: size_t new_str_len;
268:
269: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &str, &str_len) != SUCCESS) {
270: return;
271: }
272:
273: if (!str_len) {
274: RETURN_EMPTY_STRING();
275: }
276:
277: new_str = (char *)php_quot_print_encode((unsigned char *)str, (size_t)str_len, &new_str_len);
278: RETURN_STRINGL(new_str, new_str_len, 0);
279: }
280: /* }}} */
281:
282: /*
283: * Local variables:
284: * tab-width: 4
285: * c-basic-offset: 4
286: * End:
287: * vim600: sw=4 ts=4 fdm=marker
288: * vim<600: sw=4 ts=4
289: */