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dbms: IPv6StringToNum. [#METR-13151]

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This commit is contained in:
Andrey Mironov 2014-10-29 15:49:19 +03:00
parent ee34ca31d8
commit a5905c608a
2 changed files with 64 additions and 1 deletions
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64
dbms/include/DB/Functions/FunctionsCoding.h
View File

@ -121,6 +121,68 @@ public:
}
};
class FunctionIPv6StringToNum : public IFunction
{
public:
String getName() const { return "IPv6StringToNum"; }
DataTypePtr getReturnType(const DataTypes & arguments) const
{
if (arguments.size() != 1)
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
+ toString(arguments.size()) + ", should be 1.",
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
if (!typeid_cast<const DataTypeString *>(&*arguments[0]))
throw Exception("Illegal type " + arguments[0]->getName() + " of argument of function " + getName(),
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
return new DataTypeFixedString{ipv6_fixed_string_length};
}
void execute(Block & block, const ColumnNumbers & arguments, size_t result)
{
const ColumnPtr & column = block.getByPosition(arguments[0]).column;
if (const auto col_in = typeid_cast<const ColumnString *>(&*column))
{
const auto col_res = new ColumnFixedString{ipv6_fixed_string_length};
block.getByPosition(result).column = col_res;
auto & vec_res = col_res->getChars();
vec_res.resize(col_in->size() * ipv6_fixed_string_length);
const ColumnString::Chars_t & vec_src = col_in->getChars();
const ColumnString::Offsets_t & offsets_src = col_in->getOffsets();
size_t src_offset = 0;
for (size_t out_offset = 0, i = 0;
out_offset < vec_res.size();
out_offset += ipv6_fixed_string_length, ++i)
{
inet_pton(AF_INET6, reinterpret_cast<const char* >(&vec_src[src_offset]), &vec_res[out_offset]);
src_offset = offsets_src[i];
}
}
else if (const auto col_in = typeid_cast<const ColumnConstString *>(&*column))
{
String out(ipv6_fixed_string_length, 0);
inet_pton(AF_INET6, col_in->getData().data(), &out[0]);
block.getByPosition(result).column = new ColumnConst<String>{
col_in->size(),
out,
new DataTypeFixedString{ipv6_fixed_string_length}
};
}
else
throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
+ " of argument of function " + getName(),
ErrorCodes::ILLEGAL_COLUMN);
}
};
class FunctionIPv4NumToString : public IFunction
{
public:
@ -247,7 +309,7 @@ public:
return new DataTypeUInt32;
}
static inline bool isDigit(char c)
static bool isDigit(char c)
{
return c >= '0' && c <= '9';
}

1
dbms/src/Functions/FunctionsCoding.cpp
View File

@ -10,6 +10,7 @@ void registerFunctionsCoding(FunctionFactory & factory)
factory.registerFunction("toStringCutToZero", F { return new FunctionToStringCutToZero; });
factory.registerFunction("IPv6NumToString", F { return new FunctionIPv6NumToString; });
factory.registerFunction("IPv6StringToNum", F { return new FunctionIPv6StringToNum; });
factory.registerFunction("IPv4NumToString", F { return new FunctionIPv4NumToString; });
factory.registerFunction("IPv4StringToNum", F { return new FunctionIPv4StringToNum; });
factory.registerFunction("hex", F { return new FunctionHex; });