diff options
Diffstat (limited to 'php/src/Google/Protobuf/Internal/CodedOutputStream.php')
| -rw-r--r-- | php/src/Google/Protobuf/Internal/CodedOutputStream.php | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/php/src/Google/Protobuf/Internal/CodedOutputStream.php b/php/src/Google/Protobuf/Internal/CodedOutputStream.php new file mode 100644 index 00000000..4525d8dd --- /dev/null +++ b/php/src/Google/Protobuf/Internal/CodedOutputStream.php @@ -0,0 +1,159 @@ +<?php + +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +namespace Google\Protobuf\Internal; + +class CodedOutputStream +{ + + private $buffer; + private $buffer_size; + private $current; + + const MAX_VARINT64_BYTES = 10; + + public function __construct($size) + { + $this->current = 0; + $this->buffer_size = $size; + $this->buffer = str_repeat(chr(0), $this->buffer_size); + } + + public function getData() + { + return $this->buffer; + } + + public function writeVarint32($value, $trim) + { + $bytes = str_repeat(chr(0), self::MAX_VARINT64_BYTES); + $size = self::writeVarintToArray($value, $bytes, $trim); + return $this->writeRaw($bytes, $size); + } + + public function writeVarint64($value) + { + $bytes = str_repeat(chr(0), self::MAX_VARINT64_BYTES); + $size = self::writeVarintToArray($value, $bytes); + return $this->writeRaw($bytes, $size); + } + + public function writeLittleEndian32($value) + { + $bytes = str_repeat(chr(0), 4); + $size = self::writeLittleEndian32ToArray($value, $bytes); + return $this->writeRaw($bytes, $size); + } + + public function writeLittleEndian64($value) + { + $bytes = str_repeat(chr(0), 8); + $size = self::writeLittleEndian64ToArray($value, $bytes); + return $this->writeRaw($bytes, $size); + } + + public function writeTag($tag) + { + return $this->writeVarint32($tag, true); + } + + public function writeRaw($data, $size) + { + if ($this->buffer_size < $size) { + trigger_error("Output stream doesn't have enough buffer."); + return false; + } + + for ($i = 0; $i < $size; $i++) { + $this->buffer[$this->current] = $data[$i]; + $this->current++; + $this->buffer_size--; + } + return true; + } + + private static function writeVarintToArray($value, &$buffer, $trim = false) + { + $current = 0; + + $high = 0; + $low = 0; + if (PHP_INT_SIZE == 4) { + GPBUtil::divideInt64ToInt32($value, $high, $low, $trim); + } else { + $low = $value; + } + + while (($low >= 0x80 || $low < 0) || $high != 0) { + $buffer[$current] = chr($low | 0x80); + $value = ($value >> 7) & ~(0x7F << ((PHP_INT_SIZE << 3) - 7)); + $carry = ($high & 0x7F) << ((PHP_INT_SIZE << 3) - 7); + $high = ($high >> 7) & ~(0x7F << ((PHP_INT_SIZE << 3) - 7)); + $low = (($low >> 7) & ~(0x7F << ((PHP_INT_SIZE << 3) - 7)) | $carry); + $current++; + } + $buffer[$current] = chr($low); + return $current + 1; + } + + private static function writeLittleEndian32ToArray($value, &$buffer) + { + $buffer[0] = chr($value & 0x000000FF); + $buffer[1] = chr(($value >> 8) & 0x000000FF); + $buffer[2] = chr(($value >> 16) & 0x000000FF); + $buffer[3] = chr(($value >> 24) & 0x000000FF); + return 4; + } + + private static function writeLittleEndian64ToArray($value, &$buffer) + { + $high = 0; + $low = 0; + if (PHP_INT_SIZE == 4) { + GPBUtil::divideInt64ToInt32($value, $high, $low); + } else { + $low = $value & 0xFFFFFFFF; + $high = ($value >> 32) & 0xFFFFFFFF; + } + + $buffer[0] = chr($low & 0x000000FF); + $buffer[1] = chr(($low >> 8) & 0x000000FF); + $buffer[2] = chr(($low >> 16) & 0x000000FF); + $buffer[3] = chr(($low >> 24) & 0x000000FF); + $buffer[4] = chr($high & 0x000000FF); + $buffer[5] = chr(($high >> 8) & 0x000000FF); + $buffer[6] = chr(($high >> 16) & 0x000000FF); + $buffer[7] = chr(($high >> 24) & 0x000000FF); + return 8; + } + +} |