1*a325d9c4SApple OSS Distributions /*
2*a325d9c4SApple OSS Distributions * Copyright (c) 2016 Apple Inc. All rights reserved.
3*a325d9c4SApple OSS Distributions *
4*a325d9c4SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*a325d9c4SApple OSS Distributions *
6*a325d9c4SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*a325d9c4SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*a325d9c4SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*a325d9c4SApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*a325d9c4SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*a325d9c4SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*a325d9c4SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*a325d9c4SApple OSS Distributions * terms of an Apple operating system software license agreement.
14*a325d9c4SApple OSS Distributions *
15*a325d9c4SApple OSS Distributions * Please obtain a copy of the License at
16*a325d9c4SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*a325d9c4SApple OSS Distributions *
18*a325d9c4SApple OSS Distributions * The Original Code and all software distributed under the License are
19*a325d9c4SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*a325d9c4SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*a325d9c4SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*a325d9c4SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*a325d9c4SApple OSS Distributions * Please see the License for the specific language governing rights and
24*a325d9c4SApple OSS Distributions * limitations under the License.
25*a325d9c4SApple OSS Distributions *
26*a325d9c4SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*a325d9c4SApple OSS Distributions */
28*a325d9c4SApple OSS Distributions
29*a325d9c4SApple OSS Distributions #include <libkern/libkern.h>
30*a325d9c4SApple OSS Distributions
31*a325d9c4SApple OSS Distributions static int
hex2int(int c)32*a325d9c4SApple OSS Distributions hex2int(int c)
33*a325d9c4SApple OSS Distributions {
34*a325d9c4SApple OSS Distributions if (c >= '0' && c <= '9') {
35*a325d9c4SApple OSS Distributions return c - '0';
36*a325d9c4SApple OSS Distributions } else if (c >= 'A' && c <= 'F') {
37*a325d9c4SApple OSS Distributions return c - 'A' + 10;
38*a325d9c4SApple OSS Distributions } else if (c >= 'a' && c <= 'f') {
39*a325d9c4SApple OSS Distributions return c - 'a' + 10;
40*a325d9c4SApple OSS Distributions }
41*a325d9c4SApple OSS Distributions return 0;
42*a325d9c4SApple OSS Distributions }
43*a325d9c4SApple OSS Distributions
44*a325d9c4SApple OSS Distributions static bool
isprint(int ch)45*a325d9c4SApple OSS Distributions isprint(int ch)
46*a325d9c4SApple OSS Distributions {
47*a325d9c4SApple OSS Distributions return ch >= 0x20 && ch <= 0x7e;
48*a325d9c4SApple OSS Distributions }
49*a325d9c4SApple OSS Distributions
50*a325d9c4SApple OSS Distributions /*
51*a325d9c4SApple OSS Distributions * In-place decode of URL percent-encoded str
52*a325d9c4SApple OSS Distributions */
53*a325d9c4SApple OSS Distributions void
url_decode(char * str)54*a325d9c4SApple OSS Distributions url_decode(char *str)
55*a325d9c4SApple OSS Distributions {
56*a325d9c4SApple OSS Distributions if (!str) {
57*a325d9c4SApple OSS Distributions return;
58*a325d9c4SApple OSS Distributions }
59*a325d9c4SApple OSS Distributions
60*a325d9c4SApple OSS Distributions while (*str) {
61*a325d9c4SApple OSS Distributions if (*str == '%') {
62*a325d9c4SApple OSS Distributions char c = 0;
63*a325d9c4SApple OSS Distributions char *esc = str++; /* remember the start of the escape sequence */
64*a325d9c4SApple OSS Distributions
65*a325d9c4SApple OSS Distributions if (*str) {
66*a325d9c4SApple OSS Distributions c += hex2int(*str++);
67*a325d9c4SApple OSS Distributions }
68*a325d9c4SApple OSS Distributions if (*str) {
69*a325d9c4SApple OSS Distributions c = (char)((c << 4) + hex2int(*str++));
70*a325d9c4SApple OSS Distributions }
71*a325d9c4SApple OSS Distributions
72*a325d9c4SApple OSS Distributions if (isprint(c)) {
73*a325d9c4SApple OSS Distributions /* overwrite the '%' with the new char, and bump the rest of the
74*a325d9c4SApple OSS Distributions * string down a few characters */
75*a325d9c4SApple OSS Distributions *esc++ = c;
76*a325d9c4SApple OSS Distributions str = memmove(esc, str, strlen(str) + 1);
77*a325d9c4SApple OSS Distributions }
78*a325d9c4SApple OSS Distributions } else {
79*a325d9c4SApple OSS Distributions str++;
80*a325d9c4SApple OSS Distributions }
81*a325d9c4SApple OSS Distributions }
82*a325d9c4SApple OSS Distributions }
83