cpp-work/work20220401/neoString/CString.cpp

//
// Created by lenfrex on 2022/4/4.
//

#include <cstring>
#include <algorithm>

#include "CString.h"

/*
 * <EFBFBD><EFBFBD><EFBFBD>ո<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 */
CString::CString(int length) {
    data = new char[length]();
    CString::length = length;
}

CString::~CString() {
    delete[] data;
}

/*
 * <EFBFBD><EFBFBD><EFBFBD>趨<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD>Ĭ<EFBFBD><EFBFBD>512<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>
 */
CString::CString() : CString(512) {}

/*
 * <EFBFBD><EFBFBD><EFBFBD>صȺš<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Java<EFBFBD><EFBFBD>String<EFBFBD><EFBFBD><EFBFBD><EFBFBD>equal()<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>֡<EFBFBD>
 * <EFBFBD><EFBFBD><EFBFBD>ȱȽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȳ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>ֱ<EFBFBD>ӷ<EFBFBD><EFBFBD><EFBFBD>false<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>dataΪnullptr<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƚϲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>false
 * <EFBFBD><EFBFBD>ͬ<EFBFBD>Ļ<EFBFBD><EFBFBD>ٱȽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>Ƿ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD><EFBFBD>ڴ棬ֱ<EFBFBD>ӷ<EFBFBD><EFBFBD><EFBFBD>true
 * <EFBFBD><EFBFBD><EFBFBD>߶<EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD>Ž<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱȽ<EFBFBD>
 */
bool CString::operator==(const CString &source) const {
    // <EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>CString<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>data<EFBFBD><EFBFBD>Ա<EFBFBD>Ƿ<EFBFBD>Ϊ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>
    if (source.length != length || data == nullptr) {
        return false;
    } else {
        // <EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>data<EFBFBD><EFBFBD>Ա<EFBFBD>Ƿ<EFBFBD>ָ<EFBFBD><EFBFBD>ͬһ<EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>
        if (source.data == data) {
            return true;
        }
    }

    // <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>Ž<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱȽ<EFBFBD>
    int compareLength = std::min(source.length, length);
    for (int i = 0; i < compareLength; ++i) {
        if (data[i] != source.data[i]) {
            return false;
        }
    }
    return true;
}

/*
 * <EFBFBD><EFBFBD>Դ<EFBFBD>и<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>µĶ<EFBFBD><EFBFBD><EFBFBD>
 */
CString::CString(char *source) : CString((int)strlen(source)) {
    strncpy(data, source, length);
}

/*
 * <EFBFBD><EFBFBD>Դ<EFBFBD>и<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>µĶ<EFBFBD><EFBFBD>󣬲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD>С<EFBFBD><EFBFBD>Դ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᱻ<EFBFBD><EFBFBD>ȡ
 */
CString::CString(char *source, int length) : CString(length) {
    strncpy(data, source, length);
}

CString &CString::operator=(const CString &source) {
    // <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD>ɶ<EFBFBD><EFBFBD><EFBFBD>Ը<EFBFBD>ֵ
    if (this == &source) {
        return *this;
    }

    if (data != nullptr && length != 0) {
        delete[] data;
    }

    this->length = source.length;
    this->data = new char[length]();

    strncpy(data, source.data, length);

    return *this;
}

CString &CString::operator+=(const CString &source) {
    if (data == nullptr && length == 0) {
        this->length = source.length;
        this->data = new char[length]();
    }

    char *tmp = new char[length]();
    strncpy(tmp, data, length);

    // <EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ棬<EFBFBD><EFBFBD>ֹƴ<EFBFBD>Ӻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    delete[] data;
    this->length += source.length;
    this->data = new char[this->length];

    strcpy(tmp, data);
    strncat(data, source.data, source.length);

    return *this;
}

CString::CString(const CString &source) : CString(source.data, source.length) {}

/*
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶԱ<EFBFBD>
 */
bool CString::operator<(const CString &source) const {
    // <EFBFBD>ⲿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>==<EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>жϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊnull<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>¾<EFBFBD>ֱ<EFBFBD><EFBFBD>false
    if (data == nullptr || (source.length != length && source.data == data)) {
        return false;
    }

    // <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>Ž<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱȽ<EFBFBD>
    int compareLength = std::min(source.length, length);
    for (int i = 0; i < compareLength; ++i) {
        if (data[i] < source.data[i]) {
            return true;
        }
    }
    return false;
}