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pip/libs/main/core/piconstchars.h
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/*! \file piconstchars.h
* \ingroup Core
* \brief
* \~english C-String class
* \~russian Класс C-строки
*/
/*
PIP - Platform Independent Primitives
C-String class
Ivan Pelipenko peri4ko@yandex.ru, Andrey Bychkov work.a.b@yandex.ru
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PICONSTCHARS_H
#define PICONSTCHARS_H
#include "picout.h"
class PIP_EXPORT PIConstChars {
public:
//! \~english Contructs an null string.
//! \~russian Создает нулевую строку.
PIConstChars() {}
//! \~english Contructs string from C-string "string".
//! \~russian Создает строку из C-строки "string".
PIConstChars(const char * string) {
str = string;
len = strlen(string);
}
//! \~english Contructs string from "size" characters of buffer "data".
//! \~russian Создает строку из "size" символов массива "data".
PIConstChars(const char * data, size_t size) {
str = data;
len = size;
}
//! \~english Contructs a copy of string.
//! \~russian Создает копию строки.
PIConstChars(const PIConstChars & o) {
str = o.str;
len = o.len;
}
//! \~english Read-only access to character by `index`.
//! \~russian Доступ на чтение к символу по индексу `index`.
inline const char & operator [](size_t index) const {return str[index];}
//! \~english Returns \c char * string pointer.
//! \~russian Возвращает \c char * указатель строки.
inline const char * data() const {return str;}
//! \~english Returns \c true if string doesn`t have any data.
//! \~russian Возвращает \c true если строка не имеет данных.
inline bool isNull() const {return !str;}
//! \~english Returns \c true if string is empty, i.e. length = 0, or null.
//! \~russian Возвращает \c true если строка пустая, т.е. длина = 0, или нулевая.
inline bool isEmpty() const {return len == 0;}
//! \~english Returns \c true if string is not empty, i.e. length > 0.
//! \~russian Возвращает \c true если строка непустая, т.е. длина > 0.
inline bool isNotEmpty() const {return len > 0;}
//! \~english Returns characters length of string.
//! \~russian Возвращает длину строки в символах.
inline size_t length() const {return len;}
//! \~english Returns characters length of string.
//! \~russian Возвращает длину строки в символах.
inline size_t size() const {return len;}
//! \~english Returns characters length of string.
//! \~russian Возвращает длину строки в символах.
inline ssize_t size_s() const {return len;}
//! \~english Assign operator.
//! \~russian Оператор присваивания.
inline PIConstChars & operator =(const PIConstChars & s) {
if (this == &s) return *this;
len = s.len;
str = s.str;
return *this;
}
//! \~english Assign move operator.
//! \~russian Оператор перемещающего присваивания.
inline PIConstChars & operator =(PIConstChars && s) {
swap(s);
return *this;
}
//! \~english Assign operator.
//! \~russian Оператор присваивания.
inline PIConstChars & operator =(const char * s) {
str = s;
len = strlen(s);
return *this;
}
//! \~english Compare operator.
//! \~russian Оператор сравнения.
inline bool operator ==(const PIConstChars & s) const {
if (isNull() && s.isNull()) return true;
if (isNull() xor s.isNull()) return false;
if (size() != s.size()) return false;
return strcmp(str, s.str) == 0;
}
//! \~english Compare operator.
//! \~russian Оператор сравнения.
inline bool operator !=(const PIConstChars & s) const {return !(*this == s);}
//! \~english Compare operator.
//! \~russian Оператор сравнения.
inline bool operator <(const PIConstChars & s) const {
if (isNull() && s.isNull()) return false;
if (isNull() xor s.isNull()) return false;
if (size() == s.size())
return strcmp(str, s.str) < 0;
return size() < s.size();
}
//! \~english Compare operator.
//! \~russian Оператор сравнения.
inline bool operator >(const PIConstChars & s) const {
if (isNull() && s.isNull()) return false;
if (isNull() xor s.isNull()) return false;
if (size() == s.size())
return strcmp(str, s.str) > 0;
return size() > s.size();
}
//! \~english Returns hash of string content.
//! \~russian Возвращает хэш содержимого строки.
inline uint hash() const {
if (isEmpty()) return 0;
return piHashData((const uchar *)str, len);
}
inline void swap(PIConstChars& v) {
piSwap<const char *>(str, v.str);
piSwap<size_t>(len, v.len);
}
private:
const char * str = nullptr;
size_t len = 0;
};
//! \relatesalso PICout
//! \~english Output operator to \a PICout.
//! \~russian Оператор вывода в \a PICout.
inline PICout operator <<(PICout s, const PIConstChars & v) {
s.space();
if (v.isNull())
s.write("(null)");
else {
s.quote();
s.write(v.data(), v.size());
s.quote();
}
return s;
}
template<> inline uint piHash(const PIConstChars & s) {return s.hash();}
#endif // PICONSTCHARS_H