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#include "reader.h"
#include <util/stream/file.h>
namespace NIPREG {
namespace {
const TString DASH_FNAME = "-";
}
TReader::TReader(const TString& filename, bool isEmptyData, const TString& dataDelim)
: OwnedStreamPtr((filename.empty() || filename == DASH_FNAME) ? nullptr : new TFileInput(filename))
, Stream(OwnedStreamPtr ? *OwnedStreamPtr.Get() : Cin)
, IsEmptyData(isEmptyData)
, DataDelim(dataDelim)
{
}
TReader::TReader(IInputStream& stream, bool isEmptyData, const TString& dataDelim)
: Stream(stream)
, IsEmptyData(isEmptyData)
, DataDelim(dataDelim)
{
}
bool TReader::Next() {
TString line;
if (!Stream.ReadLine(line))
return false;
CurrentEntry = TRange::BuildRange(line, IsEmptyData, DataDelim);
if (CurrentEntry.Data.empty()) {
if (!IsEmptyData) {
throw yexception() << "empty data part detected for [" << line << "]";
}
CurrentEntry.Data = "";
}
return true;
}
TReverseByLastIpReader::TReverseByLastIpReader(const TString& filename, bool isEmptyData, const TString& dataDelim)
: TParent(filename, isEmptyData, dataDelim)
{
Valid = TParent::Next();
}
TReverseByLastIpReader::TReverseByLastIpReader(IInputStream& stream, bool isEmptyData, const TString& dataDelim)
: TParent(stream, isEmptyData, dataDelim)
{
Valid = TParent::Next();
}
bool TReverseByLastIpReader::Next() {
if (!CurrentEntries.empty()) {
CurrentEntries.pop_back();
}
if (CurrentEntries.empty()) {
return PrepareNextEntries();
} else {
return true;
}
}
const TGenericEntry& TReverseByLastIpReader::Get() const {
return CurrentEntries.back();
}
bool TReverseByLastIpReader::PrepareNextEntries() {
if (!Valid) {
return false;
}
do {
CurrentEntries.push_back(TParent::Get());
Valid = TParent::Next();
} while (Valid && TParent::Get().First == CurrentEntries.back().First);
return true;
}
} // NIPREG
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