<?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++;
$this->buffer_size--;
}
return true;
}
public static function writeVarintToArray($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;
}
}