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// Copyright (c) 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "source/util/bit_vector.h"
#include <cassert>
#include <iostream>
namespace spvtools {
namespace utils {
void BitVector::ReportDensity(std::ostream& out) {
uint32_t count = 0;
for (BitContainer e : bits_) {
while (e != 0) {
if ((e & 1) != 0) {
++count;
}
e = e >> 1;
}
}
out << "count=" << count
<< ", total size (bytes)=" << bits_.size() * sizeof(BitContainer)
<< ", bytes per element="
<< (double)(bits_.size() * sizeof(BitContainer)) / (double)(count);
}
bool BitVector::Or(const BitVector& other) {
auto this_it = this->bits_.begin();
auto other_it = other.bits_.begin();
bool modified = false;
while (this_it != this->bits_.end() && other_it != other.bits_.end()) {
auto temp = *this_it | *other_it;
if (temp != *this_it) {
modified = true;
*this_it = temp;
}
++this_it;
++other_it;
}
if (other_it != other.bits_.end()) {
modified = true;
this->bits_.insert(this->bits_.end(), other_it, other.bits_.end());
}
return modified;
}
std::ostream& operator<<(std::ostream& out, const BitVector& bv) {
out << "{";
for (uint32_t i = 0; i < bv.bits_.size(); ++i) {
BitVector::BitContainer b = bv.bits_[i];
uint32_t j = 0;
while (b != 0) {
if (b & 1) {
out << ' ' << i * BitVector::kBitContainerSize + j;
}
++j;
b = b >> 1;
}
}
out << "}";
return out;
}
} // namespace utils
} // namespace spvtools
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