1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
3 * LADI Session Handler (ladish)
5 * Copyright (C) 2009, 2010 Nedko Arnaudov <nedko@arnaudov.name>
7 **************************************************************************
8 * This file contains implementation of the escape helper functions
9 **************************************************************************
11 * LADI Session Handler is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * LADI Session Handler is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
23 * or write to the Free Software Foundation, Inc.,
24 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
29 static char hex_digits
[] = "0123456789ABCDEF";
31 #define HEX_TO_INT(hexchar) ((hexchar) <= '9' ? hexchar - '0' : 10 + (hexchar - 'A'))
33 void escape(const char ** src_ptr
, char ** dst_ptr
, unsigned int flags
)
45 case '/': /* used as separator for address components */
49 if ((flags
& LADISH_ESCAPE_FLAG_OTHER
) == 0)
53 case '<': /* invalid attribute value char (XML spec) */
54 case '&': /* invalid attribute value char (XML spec) */
55 case '"': /* we store attribute values in double quotes - invalid attribute value char (XML spec) */
56 if ((flags
& LADISH_ESCAPE_FLAG_XML_ATTR
) == 0)
61 dst
[1] = hex_digits
[*src
>> 4];
62 dst
[2] = hex_digits
[*src
& 0x0F];
75 void escape_simple(const char * src_ptr
, char * dst_ptr
, unsigned int flags
)
77 escape(&src_ptr
, &dst_ptr
, flags
);
81 size_t unescape(const char * src
, size_t src_len
, char * dst
)
91 ((src
[1] >= '0' && src
[1] <= '9') ||
92 (src
[1] >= 'A' && src
[1] <= 'F')) &&
93 ((src
[2] >= '0' && src
[2] <= '9') ||
94 (src
[2] >= 'A' && src
[2] <= 'F')))
96 *dst
= (HEX_TO_INT(src
[1]) << 4) | HEX_TO_INT(src
[2]);
97 //lash_info("unescaping %c%c%c to '%c'", src[0], src[1], src[2], *dst);
114 void unescape_simple(char * buffer
)
116 unescape(buffer
, strlen(buffer
) + 1, buffer
);
119 char * unescape_dup(const char * src
)
124 len
= strlen(src
) + 1;
129 unescape(src
, len
, dst
);