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- // Copyright (c) 2009 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.
- #ifndef COURGETTE_REGION_H_
- #define COURGETTE_REGION_H_
- #include <stddef.h>
- #include <stdint.h>
- #include <string>
- namespace courgette {
- // A Region is a descriptor for a region of memory. It has a start address and
- // a length measured in bytes. The Region object does not own the memory.
- //
- class Region {
- public:
- // Default constructor: and empty region.
- Region() : start_(nullptr), length_(0) {}
- // Usual constructor for regions given a |start| address and |length|.
- Region(const void* start, size_t length)
- : start_(static_cast<const uint8_t*>(start)), length_(length) {}
- // String constructor. Region is owned by the string, so the string should
- // have a lifetime greater than the region.
- explicit Region(const std::string& string)
- : start_(reinterpret_cast<const uint8_t*>(string.c_str())),
- length_(string.length()) {}
- // Copy constructor.
- Region(const Region& other) : start_(other.start_), length_(other.length_) {}
- // Assignment 'operator' makes |this| region the same as |other|.
- Region& assign(const Region& other) {
- this->start_ = other.start_;
- this->length_ = other.length_;
- return *this;
- }
- // Returns the starting address of the region.
- const uint8_t* start() const { return start_; }
- // Returns the length of the region.
- size_t length() const { return length_; }
- // Returns the address after the last byte of the region.
- const uint8_t* end() const { return start_ + length_; }
- private:
- const uint8_t* start_;
- size_t length_;
- void operator=(const Region&); // Disallow assignment operator.
- };
- } // namespace
- #endif // COURGETTE_REGION_H_
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