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Low-level serializer functions for new type/name field.

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This commit is contained in:
JoelKatz
2012-09-24 13:19:28 -07:00
parent a4070de73e
commit 8f88575b8e
2 changed files with 67 additions and 0 deletions
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62
src/Serializer.cpp
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@@ -154,6 +154,57 @@ uint256 Serializer::get256(int offset) const
return ret;
}
int Serializer::addFieldID(int type, int name)
{
int ret = mData.size();
assert((type > 0) && (type < 256) && (name > 0) && (name < 256));
if (type < 16)
{
if (name < 16) // common type, common name
mData.push_back(static_cast<unsigned char>((type << 4) | name));
else
{ // common type, uncommon name
mData.push_back(static_cast<unsigned char>(type << 4));
mData.push_back(static_cast<unsigned char>(name));
}
}
else if (name < 16)
{ // uncommon type, common name
mData.push_back(static_cast<unsigned char>(name));
mData.push_back(static_cast<unsigned char>(type));
}
else
{ // uncommon type, uncommon name
mData.push_back(static_cast<unsigned char>(0));
mData.push_back(static_cast<unsigned char>(type));
mData.push_back(static_cast<unsigned char>(name));
}
return ret;
}
bool Serializer::getFieldID(int& type, int & name, int offset) const
{
if (!get8(type, offset))
return false;
name = type & 15;
type >>= 4;
if (type == 0)
{ // uncommon type
if (!get8(type, ++offset))
return false;
if ((type == 0) || (type < 16))
return false;
}
if (name == 0)
{ // uncommon name
if (!get8(name, ++offset))
return false;
if ((name == 0) || (name < 16))
return false;
}
return true;
}
int Serializer::add8(unsigned char byte)
{
int ret = mData.size();
@@ -535,6 +586,17 @@ int SerializerIterator::getBytesLeft()
return mSerializer.size() - mPos;
}
void SerializerIterator::getFieldID(int& type, int& field)
{
if (!mSerializer.getFieldID(type, field, mPos))
throw std::runtime_error("invalid serializer getFieldID");
++mPos;
if (type >= 16)
++mPos;
if (field >= 16)
++mPos;
}
unsigned char SerializerIterator::get8()
{
int val;