gfx/skia/trunk/src/utils/SkBase64.cpp@129ffea94266 (annotated)
gfx/skia/trunk/src/utils/SkBase64.cpp
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | |
| michael@0 | 2 | /* |
| michael@0 | 3 | * Copyright 2006 The Android Open Source Project |
| michael@0 | 4 | * |
| michael@0 | 5 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 6 | * found in the LICENSE file. |
| michael@0 | 7 | */ |
| michael@0 | 8 | |
| michael@0 | 9 | |
| michael@0 | 10 | #include "SkBase64.h" |
| michael@0 | 11 | |
| michael@0 | 12 | #define DecodePad -2 |
| michael@0 | 13 | #define EncodePad 64 |
| michael@0 | 14 | |
| michael@0 | 15 | static const char default_encode[] = |
| michael@0 | 16 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| michael@0 | 17 | "abcdefghijklmnopqrstuvwxyz" |
| michael@0 | 18 | "0123456789+/="; |
| michael@0 | 19 | |
| michael@0 | 20 | static const signed char decodeData[] = { |
| michael@0 | 21 | 62, -1, -1, -1, 63, |
| michael@0 | 22 | 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, DecodePad, -1, -1, |
| michael@0 | 23 | -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
| michael@0 | 24 | 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, |
| michael@0 | 25 | -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, |
| michael@0 | 26 | 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 |
| michael@0 | 27 | }; |
| michael@0 | 28 | |
| michael@0 | 29 | SkBase64::SkBase64() : fLength((size_t) -1), fData(NULL) { |
| michael@0 | 30 | } |
| michael@0 | 31 | |
| michael@0 | 32 | #if defined _WIN32 && _MSC_VER >= 1300 // disable 'two', etc. may be used without having been initialized |
| michael@0 | 33 | #pragma warning ( push ) |
| michael@0 | 34 | #pragma warning ( disable : 4701 ) |
| michael@0 | 35 | #endif |
| michael@0 | 36 | |
| michael@0 | 37 | SkBase64::Error SkBase64::decode(const void* srcPtr, size_t size, bool writeDestination) { |
| michael@0 | 38 | unsigned char* dst = (unsigned char*) fData; |
| michael@0 | 39 | const unsigned char* dstStart = (const unsigned char*) fData; |
| michael@0 | 40 | const unsigned char* src = (const unsigned char*) srcPtr; |
| michael@0 | 41 | bool padTwo = false; |
| michael@0 | 42 | bool padThree = false; |
| michael@0 | 43 | const unsigned char* end = src + size; |
| michael@0 | 44 | while (src < end) { |
| michael@0 | 45 | unsigned char bytes[4]; |
| michael@0 | 46 | int byte = 0; |
| michael@0 | 47 | do { |
| michael@0 | 48 | unsigned char srcByte = *src++; |
| michael@0 | 49 | if (srcByte == 0) |
| michael@0 | 50 | goto goHome; |
| michael@0 | 51 | if (srcByte <= ' ') |
| michael@0 | 52 | continue; // treat as white space |
| michael@0 | 53 | if (srcByte < '+' || srcByte > 'z') |
| michael@0 | 54 | return kBadCharError; |
| michael@0 | 55 | signed char decoded = decodeData[srcByte - '+']; |
| michael@0 | 56 | bytes[byte] = decoded; |
| michael@0 | 57 | if (decoded < 0) { |
| michael@0 | 58 | if (decoded == DecodePad) |
| michael@0 | 59 | goto handlePad; |
| michael@0 | 60 | return kBadCharError; |
| michael@0 | 61 | } else |
| michael@0 | 62 | byte++; |
| michael@0 | 63 | if (*src) |
| michael@0 | 64 | continue; |
| michael@0 | 65 | if (byte == 0) |
| michael@0 | 66 | goto goHome; |
| michael@0 | 67 | if (byte == 4) |
| michael@0 | 68 | break; |
| michael@0 | 69 | handlePad: |
| michael@0 | 70 | if (byte < 2) |
| michael@0 | 71 | return kPadError; |
| michael@0 | 72 | padThree = true; |
| michael@0 | 73 | if (byte == 2) |
| michael@0 | 74 | padTwo = true; |
| michael@0 | 75 | break; |
| michael@0 | 76 | } while (byte < 4); |
| michael@0 | 77 | int two = 0; |
| michael@0 | 78 | int three = 0; |
| michael@0 | 79 | if (writeDestination) { |
| michael@0 | 80 | int one = (uint8_t) (bytes[0] << 2); |
| michael@0 | 81 | two = bytes[1]; |
| michael@0 | 82 | one |= two >> 4; |
| michael@0 | 83 | two = (uint8_t) (two << 4); |
| michael@0 | 84 | three = bytes[2]; |
| michael@0 | 85 | two |= three >> 2; |
| michael@0 | 86 | three = (uint8_t) (three << 6); |
| michael@0 | 87 | three |= bytes[3]; |
| michael@0 | 88 | SkASSERT(one < 256 && two < 256 && three < 256); |
| michael@0 | 89 | *dst = (unsigned char) one; |
| michael@0 | 90 | } |
| michael@0 | 91 | dst++; |
| michael@0 | 92 | if (padTwo) |
| michael@0 | 93 | break; |
| michael@0 | 94 | if (writeDestination) |
| michael@0 | 95 | *dst = (unsigned char) two; |
| michael@0 | 96 | dst++; |
| michael@0 | 97 | if (padThree) |
| michael@0 | 98 | break; |
| michael@0 | 99 | if (writeDestination) |
| michael@0 | 100 | *dst = (unsigned char) three; |
| michael@0 | 101 | dst++; |
| michael@0 | 102 | } |
| michael@0 | 103 | goHome: |
| michael@0 | 104 | fLength = dst - dstStart; |
| michael@0 | 105 | return kNoError; |
| michael@0 | 106 | } |
| michael@0 | 107 | |
| michael@0 | 108 | #if defined _WIN32 && _MSC_VER >= 1300 |
| michael@0 | 109 | #pragma warning ( pop ) |
| michael@0 | 110 | #endif |
| michael@0 | 111 | |
| michael@0 | 112 | size_t SkBase64::Encode(const void* srcPtr, size_t length, void* dstPtr, const char* encodeMap) { |
| michael@0 | 113 | const char* encode; |
| michael@0 | 114 | if (NULL == encodeMap) { |
| michael@0 | 115 | encode = default_encode; |
| michael@0 | 116 | } else { |
| michael@0 | 117 | encode = encodeMap; |
| michael@0 | 118 | } |
| michael@0 | 119 | const unsigned char* src = (const unsigned char*) srcPtr; |
| michael@0 | 120 | unsigned char* dst = (unsigned char*) dstPtr; |
| michael@0 | 121 | if (dst) { |
| michael@0 | 122 | size_t remainder = length % 3; |
| michael@0 | 123 | const unsigned char* end = &src[length - remainder]; |
| michael@0 | 124 | while (src < end) { |
| michael@0 | 125 | unsigned a = *src++; |
| michael@0 | 126 | unsigned b = *src++; |
| michael@0 | 127 | unsigned c = *src++; |
| michael@0 | 128 | int d = c & 0x3F; |
| michael@0 | 129 | c = (c >> 6 | b << 2) & 0x3F; |
| michael@0 | 130 | b = (b >> 4 | a << 4) & 0x3F; |
| michael@0 | 131 | a = a >> 2; |
| michael@0 | 132 | *dst++ = encode[a]; |
| michael@0 | 133 | *dst++ = encode[b]; |
| michael@0 | 134 | *dst++ = encode[c]; |
| michael@0 | 135 | *dst++ = encode[d]; |
| michael@0 | 136 | } |
| michael@0 | 137 | if (remainder > 0) { |
| michael@0 | 138 | int k1 = 0; |
| michael@0 | 139 | int k2 = EncodePad; |
| michael@0 | 140 | int a = (uint8_t) *src++; |
| michael@0 | 141 | if (remainder == 2) |
| michael@0 | 142 | { |
| michael@0 | 143 | int b = *src++; |
| michael@0 | 144 | k1 = b >> 4; |
| michael@0 | 145 | k2 = (b << 2) & 0x3F; |
| michael@0 | 146 | } |
| michael@0 | 147 | *dst++ = encode[a >> 2]; |
| michael@0 | 148 | *dst++ = encode[(k1 | a << 4) & 0x3F]; |
| michael@0 | 149 | *dst++ = encode[k2]; |
| michael@0 | 150 | *dst++ = encode[EncodePad]; |
| michael@0 | 151 | } |
| michael@0 | 152 | } |
| michael@0 | 153 | return (length + 2) / 3 * 4; |
| michael@0 | 154 | } |
| michael@0 | 155 | |
| michael@0 | 156 | SkBase64::Error SkBase64::decode(const char* src, size_t len) { |
| michael@0 | 157 | Error err = decode(src, len, false); |
| michael@0 | 158 | SkASSERT(err == kNoError); |
| michael@0 | 159 | if (err != kNoError) |
| michael@0 | 160 | return err; |
| michael@0 | 161 | fData = new char[fLength]; // should use sk_malloc/sk_free |
| michael@0 | 162 | decode(src, len, true); |
| michael@0 | 163 | return kNoError; |
| michael@0 | 164 | } |
