#include "core/Buffer.hpp"

#include <cstring>

#include "core/Buffer.hpp"
#include "core/Math.hpp"
#include "core/Utility.hpp"

Core::Buffer::Buffer() : length(0), capacity(0), buffer(nullptr) {
}

Core::Buffer::Buffer(const Buffer& other) : Buffer() {
    add(other.getData(), other.getLength());
}

Core::Buffer::Buffer(Buffer&& other) noexcept : Buffer() {
    swap(other);
}

Core::Buffer::~Buffer() {
    deallocateRaw(buffer);
}

Core::Buffer& Core::Buffer::operator=(Buffer&& other) noexcept {
    swap(other);
    return *this;
}

Core::Buffer& Core::Buffer::operator=(const Buffer& other) {
    return add(other.getData(), other.length);
}

Core::Buffer& Core::Buffer::add(const void* data, size_t size) {
    while(length + size > capacity) {
        capacity += Core::max<size_t>(8, capacity / 4);
        buffer = static_cast<char*>(reallocateRaw(buffer, capacity));
    }
    memcpy(buffer + length, data, size);
    length += size;
    return *this;
}

size_t Core::Buffer::getLength() const {
    return length;
}

const char* Core::Buffer::getData() const {
    return buffer;
}

void Core::Buffer::swap(Buffer& other) noexcept {
    Core::swap(length, other.length);
    Core::swap(capacity, other.capacity);
    Core::swap(buffer, other.buffer);
}

void Core::Buffer::clear() {
    length = 0;
}