/* Copyright 2017 - 2025 R. Thomas

* Copyright 2017 - 2025 Quarkslab

*

* 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 <vector>

#include <string>

#include <fstream>

#include "logging.hpp"

#include "LIEF/BinaryStream/VectorStream.hpp"

#include "LIEF/BinaryStream/SpanStream.hpp"

namespace LIEF {

result<VectorStream> VectorStream::from_file(const std::string& file) {

std::ifstream ifs(file, std::ios::in | std::ios::binary);

if (!ifs) {

LIEF_ERR("Can't open '{}'", file);

return make_error_code(lief_errors::read_error);

}

ifs.unsetf(std::ios::skipws);

ifs.seekg(0, std::ios::end);

const auto size = static_cast<uint64_t>(ifs.tellg());

ifs.seekg(0, std::ios::beg);

std::vector<uint8_t> data;

data.resize(size, 0);

ifs.read(reinterpret_cast<char*>(data.data()), data.size());

return VectorStream{std::move(data)};

}

std::unique_ptr<SpanStream> VectorStream::slice(uint32_t offset, size_t size) const {

if (offset > binary_.size() || (offset + size) > binary_.size()) {

return nullptr;

}

const uint8_t* start = binary_.data() + offset;

return std::unique_ptr<SpanStream>(new SpanStream(start, size));

}

std::unique_ptr<SpanStream> VectorStream::slice(uint32_t offset) const {

return slice(offset, binary_.size() - offset);

}

}