lonely-tiger/utils/String.cpp

#include <cstdio>

#include "utils/String.h"

String::String() : String("") {
}

String::String(const char* str) : usedCapacity(1) {
    *this += str;
}

String& String::operator+=(const char* str) {
    usedCapacity--;
    size_t start = usedCapacity;
    while(usedCapacity + 1 < capacity && str[usedCapacity - start] != '\0') {
        path[usedCapacity] = str[usedCapacity - start];
        usedCapacity++;
    }
    path[usedCapacity++] = '\0';
    return *this;
}

String& String::operator+=(char c) {
    if(usedCapacity + 1 < capacity) {
        path[usedCapacity - 1] = c;
        path[usedCapacity] = '\0';
        usedCapacity++;
    }
    return *this;
}

String& String::operator+=(unsigned int i) {
    usedCapacity += snprintf(path + usedCapacity - 1, capacity - usedCapacity, "%u", i);
    return *this;
}

String& String::operator+=(double d) {
    usedCapacity += snprintf(path + usedCapacity - 1, capacity - usedCapacity, (d == (long) d) ? "%lg.0" : "%lg", d);
    return *this;
}

String String::operator+(const char* str) const {
    String s(this->path);
    s += str;
    return s;
}

String::operator const char*() const {
    return path;
}