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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "unpackinfo.h"
#include <vespa/vespalib/stllike/asciistream.h>
#include <cassert>
#include <algorithm>
namespace search::queryeval {
UnpackInfo::UnpackInfo()
: _size(0)
{
memset(_unpack, 0, sizeof(_unpack));
}
UnpackInfo &
UnpackInfo::add(size_t index)
{
if ((index <= max_index) && (_size < max_size)) {
_unpack[_size++] = index;
std::sort(&_unpack[0], &_unpack[_size]);
} else {
forceAll();
}
return *this;
}
UnpackInfo &
UnpackInfo::insert(size_t index, bool unpack)
{
if (unpackAll()) {
return *this;
}
for (size_t rp = 0; rp < _size; ++rp) {
if (_unpack[rp] >= index) {
if (_unpack[rp] == max_index) {
forceAll();
return *this;
}
++_unpack[rp];
}
}
if (unpack) {
add(index);
}
return *this;
}
UnpackInfo &
UnpackInfo::remove(size_t index)
{
if (unpackAll()) {
return *this;
}
size_t wp = 0;
bool found_index = false;
for (size_t rp = 0; rp < _size; ++rp) {
if (_unpack[rp] == index) {
found_index = true;
} else if (_unpack[rp] > index) {
_unpack[wp++] = (_unpack[rp] - 1);
} else {
_unpack[wp++] = _unpack[rp];
}
}
if (found_index) {
--_size;
}
assert(wp == _size);
return *this;
}
bool
UnpackInfo::needUnpack(size_t index) const
{
if (unpackAll()) {
return true;
}
for (size_t i = 0; i < _size; ++i) {
if (_unpack[i] == index) {
return true;
}
}
return false;
}
vespalib::string
UnpackInfo::toString() const
{
vespalib::asciistream os;
if (unpackAll()) {
os << "full-unpack";
} else if (empty()) {
os << "no-unpack";
} else {
os << size_t(_unpack[0]);
for (size_t i = 1; i < _size; ++i) {
os << " " << size_t(_unpack[i]);
}
}
return os.str();
}
}
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