72 lines
1.6 KiB
C++
72 lines
1.6 KiB
C++
// Copyright 2015 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/der/input.h"
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#include <algorithm>
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#include "base/check_op.h"
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namespace net::der {
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Input::Input(std::string_view in)
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: data_(reinterpret_cast<const uint8_t*>(in.data())), len_(in.length()) {}
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Input::Input(const std::string* s) : Input(std::string_view(*s)) {}
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std::string Input::AsString() const {
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return std::string(reinterpret_cast<const char*>(data_), len_);
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}
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std::string_view Input::AsStringView() const {
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return std::string_view(reinterpret_cast<const char*>(data_), len_);
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}
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base::span<const uint8_t> Input::AsSpan() const {
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return base::make_span(data_, len_);
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}
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bool operator==(const Input& lhs, const Input& rhs) {
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return lhs.Length() == rhs.Length() &&
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std::equal(lhs.UnsafeData(), lhs.UnsafeData() + lhs.Length(),
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rhs.UnsafeData());
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}
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bool operator!=(const Input& lhs, const Input& rhs) {
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return !(lhs == rhs);
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}
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ByteReader::ByteReader(const Input& in)
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: data_(in.UnsafeData()), len_(in.Length()) {
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}
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bool ByteReader::ReadByte(uint8_t* byte_p) {
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if (!HasMore())
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return false;
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*byte_p = *data_;
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Advance(1);
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return true;
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}
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bool ByteReader::ReadBytes(size_t len, Input* out) {
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if (len > len_)
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return false;
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*out = Input(data_, len);
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Advance(len);
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return true;
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}
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// Returns whether there is any more data to be read.
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bool ByteReader::HasMore() {
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return len_ > 0;
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}
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void ByteReader::Advance(size_t len) {
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CHECK_LE(len, len_);
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data_ += len;
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len_ -= len;
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}
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} // namespace net::der
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