blob: c816d50b52113b154875ea12b31cd2062827adee [file] [log] [blame]
// 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 {
namespace 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 der
} // namespace net