/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.server.types.common.funcs;
import com.foundationdb.server.error.InvalidCharToNumException;
import com.foundationdb.server.types.LazyList;
import com.foundationdb.server.types.TClass;
import com.foundationdb.server.types.TExecutionContext;
import com.foundationdb.server.types.TOverloadResult;
import com.foundationdb.server.types.common.types.TString;
import com.foundationdb.server.types.value.ValueSource;
import com.foundationdb.server.types.value.ValueTarget;
import com.foundationdb.server.types.texpressions.TInputSetBuilder;
import com.foundationdb.server.types.texpressions.TScalarBase;
public class InetAton extends TScalarBase
{
private static final long FACTORS[] = {16777216L, 65536, 256};
private final TClass argType;
private final TClass returnType;
public InetAton(TClass tclass, TClass returnType)
{
assert tclass instanceof TString : "expecting a string class";
this.argType = tclass;
// TODO: assert returnType instaceof BIGINT ...
this.returnType = returnType;
}
@Override
protected void buildInputSets(TInputSetBuilder builder)
{
builder.covers(argType, 0);
}
@Override
protected void doEvaluate(TExecutionContext context, LazyList<? extends ValueSource> inputs, ValueTarget output)
{
String tks[] = (inputs.get(0).getString()).split("\\.");
if (tks.length > 4)
output.putNull();
else
try
{
int last = tks.length - 1;
short val = Short.parseShort(tks[last]);
long ret = val;
if (ret < 0 || ret > 255) output.putNull();
else if (tks.length == 1) output.putInt64(ret);
else
{
for (int i = 0; i < last; ++i)
if ((val = Short.parseShort(tks[i])) < 0 || val > 255)
{
output.putNull();
return;
}
else
ret += val * FACTORS[i];
output.putInt64(ret);
}
}
catch (NumberFormatException e)
{
context.warnClient(new InvalidCharToNumException(e.getMessage()));
output.putNull();
}
}
@Override
public String displayName()
{
return "INET_ATON";
}
@Override
public TOverloadResult resultType()
{
return TOverloadResult.fixed(returnType);
}
}