1*0f4c859eSApple OSS Distributions /*
2*0f4c859eSApple OSS Distributions * Copyright (c) 2016 Apple Inc. All rights reserved.
3*0f4c859eSApple OSS Distributions *
4*0f4c859eSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*0f4c859eSApple OSS Distributions *
6*0f4c859eSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*0f4c859eSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*0f4c859eSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*0f4c859eSApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*0f4c859eSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*0f4c859eSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*0f4c859eSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*0f4c859eSApple OSS Distributions * terms of an Apple operating system software license agreement.
14*0f4c859eSApple OSS Distributions *
15*0f4c859eSApple OSS Distributions * Please obtain a copy of the License at
16*0f4c859eSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*0f4c859eSApple OSS Distributions *
18*0f4c859eSApple OSS Distributions * The Original Code and all software distributed under the License are
19*0f4c859eSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*0f4c859eSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*0f4c859eSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*0f4c859eSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*0f4c859eSApple OSS Distributions * Please see the License for the specific language governing rights and
24*0f4c859eSApple OSS Distributions * limitations under the License.
25*0f4c859eSApple OSS Distributions *
26*0f4c859eSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*0f4c859eSApple OSS Distributions */
28*0f4c859eSApple OSS Distributions
29*0f4c859eSApple OSS Distributions #include <libkern/libkern.h>
30*0f4c859eSApple OSS Distributions
31*0f4c859eSApple OSS Distributions static int
hex2int(int c)32*0f4c859eSApple OSS Distributions hex2int(int c)
33*0f4c859eSApple OSS Distributions {
34*0f4c859eSApple OSS Distributions if (c >= '0' && c <= '9') {
35*0f4c859eSApple OSS Distributions return c - '0';
36*0f4c859eSApple OSS Distributions } else if (c >= 'A' && c <= 'F') {
37*0f4c859eSApple OSS Distributions return c - 'A' + 10;
38*0f4c859eSApple OSS Distributions } else if (c >= 'a' && c <= 'f') {
39*0f4c859eSApple OSS Distributions return c - 'a' + 10;
40*0f4c859eSApple OSS Distributions }
41*0f4c859eSApple OSS Distributions return 0;
42*0f4c859eSApple OSS Distributions }
43*0f4c859eSApple OSS Distributions
44*0f4c859eSApple OSS Distributions static bool
isprint(int ch)45*0f4c859eSApple OSS Distributions isprint(int ch)
46*0f4c859eSApple OSS Distributions {
47*0f4c859eSApple OSS Distributions return ch >= 0x20 && ch <= 0x7e;
48*0f4c859eSApple OSS Distributions }
49*0f4c859eSApple OSS Distributions
50*0f4c859eSApple OSS Distributions /*
51*0f4c859eSApple OSS Distributions * In-place decode of URL percent-encoded str
52*0f4c859eSApple OSS Distributions */
53*0f4c859eSApple OSS Distributions void
url_decode(char * str)54*0f4c859eSApple OSS Distributions url_decode(char *str)
55*0f4c859eSApple OSS Distributions {
56*0f4c859eSApple OSS Distributions if (!str) {
57*0f4c859eSApple OSS Distributions return;
58*0f4c859eSApple OSS Distributions }
59*0f4c859eSApple OSS Distributions
60*0f4c859eSApple OSS Distributions while (*str) {
61*0f4c859eSApple OSS Distributions if (*str == '%') {
62*0f4c859eSApple OSS Distributions char c = 0;
63*0f4c859eSApple OSS Distributions char *esc = str++; /* remember the start of the escape sequence */
64*0f4c859eSApple OSS Distributions
65*0f4c859eSApple OSS Distributions if (*str) {
66*0f4c859eSApple OSS Distributions c += hex2int(*str++);
67*0f4c859eSApple OSS Distributions }
68*0f4c859eSApple OSS Distributions if (*str) {
69*0f4c859eSApple OSS Distributions c = (char)((c << 4) + hex2int(*str++));
70*0f4c859eSApple OSS Distributions }
71*0f4c859eSApple OSS Distributions
72*0f4c859eSApple OSS Distributions if (isprint(c)) {
73*0f4c859eSApple OSS Distributions /* overwrite the '%' with the new char, and bump the rest of the
74*0f4c859eSApple OSS Distributions * string down a few characters */
75*0f4c859eSApple OSS Distributions *esc++ = c;
76*0f4c859eSApple OSS Distributions str = memmove(esc, str, strlen(str) + 1);
77*0f4c859eSApple OSS Distributions }
78*0f4c859eSApple OSS Distributions } else {
79*0f4c859eSApple OSS Distributions str++;
80*0f4c859eSApple OSS Distributions }
81*0f4c859eSApple OSS Distributions }
82*0f4c859eSApple OSS Distributions }
83