mirror of https://github.com/bsnes-emu/bsnes.git
95 lines
1.7 KiB
C++
95 lines
1.7 KiB
C++
#ifdef NALL_STRING_INTERNAL_HPP
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/*
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vector allocator
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sizeof(string) == 16 (amd64)
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utilizes a raw string pointer
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always allocates memory onto the heap when string is not empty
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pros:
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* potential for in-place resize
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* simplicity
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cons:
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* always allocates heap memory on (capacity > 0)
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* pass-by-value requires heap allocation
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*/
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namespace nall {
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char* string::data() {
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if(_capacity == 0) reserve(1);
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return _data;
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}
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const char* string::data() const {
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if(_capacity == 0) return "";
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return _data;
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}
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void string::reserve(unsigned capacity) {
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if(capacity > _capacity) {
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_capacity = bit::round(capacity + 1) - 1;
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_data = (char*)realloc(_data, _capacity + 1);
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_data[_capacity] = 0;
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}
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}
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void string::resize(unsigned size) {
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reserve(size);
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data()[_size = size] = 0;
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}
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void string::reset() {
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if(_data) { free(_data); _data = nullptr; }
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_capacity = 0;
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_size = 0;
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}
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string& string::operator=(const string& source) {
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if(&source == this) return *this;
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reset();
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_data = (char*)malloc(source._size + 1);
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_capacity = source._size;
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_size = source._size;
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memcpy(_data, source.data(), source.size() + 1);
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return *this;
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}
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string& string::operator=(string&& source) {
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if(&source == this) return *this;
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reset();
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_data = source._data;
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_capacity = source._capacity;
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_size = source._size;
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source._data = nullptr;
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source._capacity = 0;
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source._size = 0;
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return *this;
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}
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template<typename T, typename... Args> string::string(T&& source, Args&&... args) {
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construct();
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sprint(*this, std::forward<T>(source), std::forward<Args>(args)...);
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}
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string::string() {
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construct();
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}
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string::~string() {
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reset();
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}
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void string::construct() {
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_data = nullptr;
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_capacity = 0;
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_size = 0;
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}
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}
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#endif
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