avm99963 | 99bb77c | 2020-01-27 03:15:08 +0100 | [diff] [blame^] | 1 | <?php |
| 2 | |
| 3 | // Protocol Buffers - Google's data interchange format |
| 4 | // Copyright 2008 Google Inc. All rights reserved. |
| 5 | // https://developers.google.com/protocol-buffers/ |
| 6 | // |
| 7 | // Redistribution and use in source and binary forms, with or without |
| 8 | // modification, are permitted provided that the following conditions are |
| 9 | // met: |
| 10 | // |
| 11 | // * Redistributions of source code must retain the above copyright |
| 12 | // notice, this list of conditions and the following disclaimer. |
| 13 | // * Redistributions in binary form must reproduce the above |
| 14 | // copyright notice, this list of conditions and the following disclaimer |
| 15 | // in the documentation and/or other materials provided with the |
| 16 | // distribution. |
| 17 | // * Neither the name of Google Inc. nor the names of its |
| 18 | // contributors may be used to endorse or promote products derived from |
| 19 | // this software without specific prior written permission. |
| 20 | // |
| 21 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 22 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 23 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 24 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 25 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 26 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 27 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 28 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 29 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 30 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 31 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | |
| 33 | namespace Google\Protobuf\Internal; |
| 34 | |
| 35 | class CodedOutputStream |
| 36 | { |
| 37 | |
| 38 | private $buffer; |
| 39 | private $buffer_size; |
| 40 | private $current; |
| 41 | |
| 42 | const MAX_VARINT64_BYTES = 10; |
| 43 | |
| 44 | public function __construct($size) |
| 45 | { |
| 46 | $this->current = 0; |
| 47 | $this->buffer_size = $size; |
| 48 | $this->buffer = str_repeat(chr(0), $this->buffer_size); |
| 49 | } |
| 50 | |
| 51 | public function getData() |
| 52 | { |
| 53 | return $this->buffer; |
| 54 | } |
| 55 | |
| 56 | public function writeVarint32($value, $trim) |
| 57 | { |
| 58 | $bytes = str_repeat(chr(0), self::MAX_VARINT64_BYTES); |
| 59 | $size = self::writeVarintToArray($value, $bytes, $trim); |
| 60 | return $this->writeRaw($bytes, $size); |
| 61 | } |
| 62 | |
| 63 | public function writeVarint64($value) |
| 64 | { |
| 65 | $bytes = str_repeat(chr(0), self::MAX_VARINT64_BYTES); |
| 66 | $size = self::writeVarintToArray($value, $bytes); |
| 67 | return $this->writeRaw($bytes, $size); |
| 68 | } |
| 69 | |
| 70 | public function writeLittleEndian32($value) |
| 71 | { |
| 72 | $bytes = str_repeat(chr(0), 4); |
| 73 | $size = self::writeLittleEndian32ToArray($value, $bytes); |
| 74 | return $this->writeRaw($bytes, $size); |
| 75 | } |
| 76 | |
| 77 | public function writeLittleEndian64($value) |
| 78 | { |
| 79 | $bytes = str_repeat(chr(0), 8); |
| 80 | $size = self::writeLittleEndian64ToArray($value, $bytes); |
| 81 | return $this->writeRaw($bytes, $size); |
| 82 | } |
| 83 | |
| 84 | public function writeTag($tag) |
| 85 | { |
| 86 | return $this->writeVarint32($tag, true); |
| 87 | } |
| 88 | |
| 89 | public function writeRaw($data, $size) |
| 90 | { |
| 91 | if ($this->buffer_size < $size) { |
| 92 | trigger_error("Output stream doesn't have enough buffer."); |
| 93 | return false; |
| 94 | } |
| 95 | |
| 96 | for ($i = 0; $i < $size; $i++) { |
| 97 | $this->buffer[$this->current] = $data[$i]; |
| 98 | $this->current++; |
| 99 | $this->buffer_size--; |
| 100 | } |
| 101 | return true; |
| 102 | } |
| 103 | |
| 104 | public static function writeVarintToArray($value, &$buffer, $trim = false) |
| 105 | { |
| 106 | $current = 0; |
| 107 | |
| 108 | $high = 0; |
| 109 | $low = 0; |
| 110 | if (PHP_INT_SIZE == 4) { |
| 111 | GPBUtil::divideInt64ToInt32($value, $high, $low, $trim); |
| 112 | } else { |
| 113 | $low = $value; |
| 114 | } |
| 115 | |
| 116 | while (($low >= 0x80 || $low < 0) || $high != 0) { |
| 117 | $buffer[$current] = chr($low | 0x80); |
| 118 | $value = ($value >> 7) & ~(0x7F << ((PHP_INT_SIZE << 3) - 7)); |
| 119 | $carry = ($high & 0x7F) << ((PHP_INT_SIZE << 3) - 7); |
| 120 | $high = ($high >> 7) & ~(0x7F << ((PHP_INT_SIZE << 3) - 7)); |
| 121 | $low = (($low >> 7) & ~(0x7F << ((PHP_INT_SIZE << 3) - 7)) | $carry); |
| 122 | $current++; |
| 123 | } |
| 124 | $buffer[$current] = chr($low); |
| 125 | return $current + 1; |
| 126 | } |
| 127 | |
| 128 | private static function writeLittleEndian32ToArray($value, &$buffer) |
| 129 | { |
| 130 | $buffer[0] = chr($value & 0x000000FF); |
| 131 | $buffer[1] = chr(($value >> 8) & 0x000000FF); |
| 132 | $buffer[2] = chr(($value >> 16) & 0x000000FF); |
| 133 | $buffer[3] = chr(($value >> 24) & 0x000000FF); |
| 134 | return 4; |
| 135 | } |
| 136 | |
| 137 | private static function writeLittleEndian64ToArray($value, &$buffer) |
| 138 | { |
| 139 | $high = 0; |
| 140 | $low = 0; |
| 141 | if (PHP_INT_SIZE == 4) { |
| 142 | GPBUtil::divideInt64ToInt32($value, $high, $low); |
| 143 | } else { |
| 144 | $low = $value & 0xFFFFFFFF; |
| 145 | $high = ($value >> 32) & 0xFFFFFFFF; |
| 146 | } |
| 147 | |
| 148 | $buffer[0] = chr($low & 0x000000FF); |
| 149 | $buffer[1] = chr(($low >> 8) & 0x000000FF); |
| 150 | $buffer[2] = chr(($low >> 16) & 0x000000FF); |
| 151 | $buffer[3] = chr(($low >> 24) & 0x000000FF); |
| 152 | $buffer[4] = chr($high & 0x000000FF); |
| 153 | $buffer[5] = chr(($high >> 8) & 0x000000FF); |
| 154 | $buffer[6] = chr(($high >> 16) & 0x000000FF); |
| 155 | $buffer[7] = chr(($high >> 24) & 0x000000FF); |
| 156 | return 8; |
| 157 | } |
| 158 | |
| 159 | } |