blob: c606cba6e2b37d5121c4ace45c0b1478ab8b53b8 [file] [log] [blame]
/*
*
* Copyright (c) 2021 Project CHIP Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "BufferWriter.h"
namespace chip {
namespace Encoding {
BufferWriter & BufferWriter::Put(const char * s)
{
static_assert(CHAR_BIT == 8, "We're assuming char and uint8_t are the same size");
return Put(s, strlen(s));
}
BufferWriter & BufferWriter::Put(const void * buf, size_t len)
{
size_t available = Available();
if (available > 0)
{
memmove(mBuf + mNeeded, buf, available < len ? available : len);
}
mNeeded += len;
return *this;
}
BufferWriter & BufferWriter::Put(uint8_t c)
{
if (mNeeded < mSize)
{
mBuf[mNeeded] = c;
}
++mNeeded;
return *this;
}
LittleEndian::BufferWriter & LittleEndian::BufferWriter::EndianPut(uint64_t x, size_t size)
{
while (size > 0)
{
Put(static_cast<uint8_t>(x & 0xff));
x >>= 8;
size--;
}
return *this;
}
LittleEndian::BufferWriter & LittleEndian::BufferWriter::EndianPutSigned(int64_t x, size_t size)
{
while (size > 0)
{
Put(static_cast<uint8_t>(x & 0xff));
x >>= 8;
size--;
}
return *this;
}
BigEndian::BufferWriter & BigEndian::BufferWriter::EndianPut(uint64_t x, size_t size)
{
while (size-- > 0)
{
Put(static_cast<uint8_t>((x >> (size * 8)) & 0xff));
}
return *this;
}
BigEndian::BufferWriter & BigEndian::BufferWriter::EndianPutSigned(int64_t x, size_t size)
{
while (size-- > 0)
{
Put(static_cast<uint8_t>((x >> (size * 8)) & 0xff));
}
return *this;
}
} // namespace Encoding
} // namespace chip