void
Block::parse() const
{
if (!m_subBlocks.empty() || value_size() == 0)
return;
Buffer::const_iterator begin = value_begin();
Buffer::const_iterator end = value_end();
while (begin != end)
{
Buffer::const_iterator element_begin = begin;
uint32_t type = Tlv::readType(begin, end);
uint64_t length = Tlv::readVarNumber(begin, end);
if (length > static_cast<uint64_t>(end - begin))
{
m_subBlocks.clear();
throw Tlv::Error("TLV length exceeds buffer length");
}
Buffer::const_iterator element_end = begin + length;
m_subBlocks.push_back(Block(m_buffer,
type,
element_begin, element_end,
begin, element_end));
begin = element_end;
// don't do recursive parsing, just the top level
}
}
bool
Component::equals(const Component& other) const
{
return type() == other.type() &&
value_size() == other.value_size() &&
(empty() || // needed with Apple clang < 9.0.0 due to libc++ bug
std::equal(value_begin(), value_end(), other.value_begin()));
}
uint64_t
Component::toNumberWithMarker(uint8_t marker) const
{
if (!isNumberWithMarker(marker))
NDN_THROW(Error("Name component does not have the requested marker "
"or the value is not a nonNegativeInteger"));
Buffer::const_iterator valueBegin = value_begin() + 1;
return tlv::readNonNegativeInteger(value_size() - 1, valueBegin, value_end());
}
Block
Block::blockFromValue() const
{
if (value_size() == 0)
throw Error("Underlying value buffer is empty");
Buffer::const_iterator begin = value_begin(),
end = value_end();
Buffer::const_iterator element_begin = begin;
uint32_t type = Tlv::readType(begin, end);
uint64_t length = Tlv::readVarNumber(begin, end);
if (length != static_cast<uint64_t>(end - begin))
throw Tlv::Error("TLV length mismatches buffer length");
return Block(m_buffer,
type,
element_begin, end,
begin, end);
}
