94 lines
3 KiB
C++
94 lines
3 KiB
C++
|
// Copyright 2012 Google Inc.
|
||
|
|
// All rights reserved.
|
||
|
|
//
|
||
|
|
// Redistribution and use in source and binary forms, with or without
|
||
|
|
// modification, are permitted provided that the following conditions are
|
||
|
|
// met:
|
||
|
|
//
|
||
|
|
// * Redistributions of source code must retain the above copyright
|
||
|
|
// notice, this list of conditions and the following disclaimer.
|
||
|
|
// * Redistributions in binary form must reproduce the above copyright
|
||
|
|
// notice, this list of conditions and the following disclaimer in the
|
||
|
|
// documentation and/or other materials provided with the distribution.
|
||
|
|
// * Neither the name of Google Inc. nor the names of its contributors
|
||
|
|
// may be used to endorse or promote products derived from this software
|
||
|
|
// without specific prior written permission.
|
||
|
|
//
|
||
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
/// \file utils/units.hpp
|
||
|
|
/// Formatters and parsers of user-friendly units.
|
||
|
|
|
||
|
|
#if !defined(UTILS_UNITS_HPP)
|
||
|
|
#define UTILS_UNITS_HPP
|
||
|
|
|
||
|
|
extern "C" {
|
||
|
|
#include <stdint.h>
|
||
|
|
}
|
||
|
|
|
||
|
|
#include <istream>
|
||
|
|
#include <ostream>
|
||
|
|
#include <string>
|
||
|
|
|
||
|
|
namespace utils {
|
||
|
|
namespace units {
|
||
|
|
|
||
|
|
|
||
|
|
namespace {
|
||
|
|
|
||
|
|
/// Constant representing 1 kilobyte.
|
||
|
|
const uint64_t KB = int64_t(1) << 10;
|
||
|
|
|
||
|
|
/// Constant representing 1 megabyte.
|
||
|
|
const uint64_t MB = int64_t(1) << 20;
|
||
|
|
|
||
|
|
/// Constant representing 1 gigabyte.
|
||
|
|
const uint64_t GB = int64_t(1) << 30;
|
||
|
|
|
||
|
|
/// Constant representing 1 terabyte.
|
||
|
|
const uint64_t TB = int64_t(1) << 40;
|
||
|
|
|
||
|
|
} // anonymous namespace
|
||
|
|
|
||
|
|
|
||
|
|
/// Representation of a bytes quantity.
|
||
|
|
///
|
||
|
|
/// The purpose of this class is to represent an amount of bytes in a semantic
|
||
|
|
/// manner, and to provide functions to format such numbers for nice user
|
||
|
|
/// presentation and to parse back such numbers.
|
||
|
|
///
|
||
|
|
/// The input follows this regular expression: [0-9]+(|\.[0-9]+)[GgKkMmTt]?
|
||
|
|
/// The output follows this regular expression: [0-9]+\.[0-9]{3}[GKMT]?
|
||
|
|
class bytes {
|
||
|
|
/// Raw representation, in bytes, of the quantity.
|
||
|
|
uint64_t _count;
|
||
|
|
|
||
|
|
public:
|
||
|
|
bytes(void);
|
||
|
|
explicit bytes(const uint64_t);
|
||
|
|
|
||
|
|
static bytes parse(const std::string&);
|
||
|
|
std::string format(void) const;
|
||
|
|
|
||
|
|
operator uint64_t(void) const;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
} // namespace units
|
||
|
|
} // namespace utils
|
||
|
|
|
||
|
|
std::istream& operator>>(std::istream&, utils::units::bytes&);
|
||
|
|
std::ostream& operator<<(std::ostream&, const utils::units::bytes&);
|
||
|
|
|
||
|
|
#endif // !defined(UTILS_UNITS_HPP)
|