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