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