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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 "contrib/libs/apache/arrow_next/cpp/src/arrow/util/bitmap_builders.h"
#include <cstdint>
#include <cstring>
#include <memory>
#include <type_traits>
#include <utility>
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/buffer.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/result.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/status.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/util/bit_util.h"
namespace arrow20 {
namespace internal {
namespace {
void FillBitsFromBytes(util::span<const uint8_t> bytes, uint8_t* bits) {
for (size_t i = 0; i < bytes.size(); ++i) {
if (bytes[i] > 0) {
bit_util::SetBit(bits, i);
}
}
}
} // namespace
Result<std::shared_ptr<Buffer>> BytesToBits(util::span<const uint8_t> bytes,
MemoryPool* pool) {
int64_t bit_length = bit_util::BytesForBits(bytes.size());
ARROW_ASSIGN_OR_RAISE(auto buffer, AllocateBuffer(bit_length, pool));
uint8_t* out_buf = buffer->mutable_data();
memset(out_buf, 0, static_cast<size_t>(buffer->capacity()));
FillBitsFromBytes(bytes, out_buf);
// R build with openSUSE155 requires an explicit shared_ptr construction
return std::shared_ptr<Buffer>(std::move(buffer));
}
Result<std::shared_ptr<Buffer>> BitmapAllButOne(MemoryPool* pool, int64_t length,
int64_t straggler_pos, bool value) {
if (straggler_pos < 0 || straggler_pos >= length) {
return Status::Invalid("invalid straggler_pos ", straggler_pos);
}
ARROW_ASSIGN_OR_RAISE(auto buffer,
AllocateBuffer(bit_util::BytesForBits(length), pool));
auto bitmap_data = buffer->mutable_data();
bit_util::SetBitsTo(bitmap_data, 0, length, value);
bit_util::SetBitTo(bitmap_data, straggler_pos, !value);
// R build with openSUSE155 requires an explicit shared_ptr construction
return std::shared_ptr<Buffer>(std::move(buffer));
}
} // namespace internal
} // namespace arrow20
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