spine-runtimes/spine-cpp/spine-cpp/include/spine/String.h

/******************************************************************************
 * Spine Runtimes Software License v2.5
 *
 * Copyright (c) 2013-2016, Esoteric Software
 * All rights reserved.
 *
 * You are granted a perpetual, non-exclusive, non-sublicensable, and
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 * Software, including any copy thereof. Redistributions in binary or source
 * form must include this license and terms.
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#ifndef SPINE_STRING_H
#define SPINE_STRING_H

#include <spine/SpineObject.h>
#include <spine/Extension.h>

#include <string.h>

namespace Spine {
	class String : public SpineObject {
	public:
		String (): _length(0), _buffer(NULL) {
		}

		String (const char* chars, bool own = false) {
			if (!chars) {
				_length = 0;
				_buffer = NULL;
			} else {
				_length = strlen(chars);
				if (!own) {
					_buffer = SpineExtension::alloc<char>(_length + 1, __FILE__, __LINE__);
					memcpy((void *) _buffer, chars, _length + 1);
				} else {
					_buffer = chars;
				}
			}
		}

		String (const String& other) {
			if (!other._buffer) {
				_length = 0;
				_buffer = NULL;
			} else {
				_length = other._length;
				_buffer = SpineExtension::alloc<char>(other._length + 1, __FILE__, __LINE__);
				memcpy((void*)_buffer, other._buffer, other._length + 1);
			}
		}

		size_t length () const {
			return _length;
		}

		const char* buffer () const {
			return _buffer;
		}

		void own (const String& other) {
			if (this == &other) return;
			if (_buffer) {
				SpineExtension::free(_buffer, __FILE__, __LINE__);
			}
			_length = other._length;
			_buffer = other._buffer;
			other._length = 0;
			other._buffer = NULL;
		}

		void own (const char* chars) {
			if (_buffer == chars) return;
			if (_buffer) {
				SpineExtension::free(_buffer, __FILE__, __LINE__);
			}

			if (!chars) {
				_length = 0;
				_buffer = 0;
			} else {
				_length = strlen(chars);
				_buffer = chars;
			}
		}

		String& operator= (const String& other) {
			if (this == &other) return *this;
			if (_buffer) {
				SpineExtension::free(_buffer, __FILE__, __LINE__);
			}
			if (!other._buffer) {
				_length = 0;
				_buffer = NULL;
			} else {
				_length = other._length;
				_buffer = SpineExtension::alloc<char>(other._length + 1, __FILE__, __LINE__);
				memcpy((void*)_buffer, other._buffer, other._length + 1);
			}
			return *this;
		}

		String& operator= (const char* chars) {
			if (_buffer == chars) return *this;
			if (_buffer) {
				SpineExtension::free(_buffer, __FILE__, __LINE__);
			}
			if (!chars) {
				_length = 0;
				_buffer = NULL;
			} else {
				_length = strlen(chars);
				_buffer = SpineExtension::alloc<char>(_length + 1, __FILE__, __LINE__);
				memcpy((void*)_buffer, chars, _length + 1);
			}
			return *this;
		}

		friend bool operator== (const String& a, const String& b) {
			if (a._buffer == b._buffer) return true;
			if (a._length != b._length) return false;
			if (a._buffer && b._buffer) {
				return strcmp(a._buffer, b._buffer) == 0;
			} else {
				return false;
			}
		}

		friend bool operator!= (const String& a, const String& b) {
			return !(a == b);
		}

		~String () {
			if (_buffer) {
				SpineExtension::free(_buffer, __FILE__, __LINE__);
			}
		}
	private:
		mutable size_t _length;
		mutable const char* _buffer;
	};
}


#endif //SPINE_STRING_H