geode/loader/include/Geode/c++stl/gnustl.hpp

#pragma once

#include <algorithm>
#include <map>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <set>
#include <vector>

namespace geode::base {
    uintptr_t get();
}

#if defined(GEODE_IS_ANDROID)

    #include "gnustl-map.hpp"
    #include "gnustl/unordered_map.hpp"
    #include "gnustl/unordered_set.hpp"
    #include "gnustl/hash_specialization.hpp"
    #undef _GLIBCXX_RELEASE
    #undef __GLIBCXX__
    #undef _GLIBCXX_USE_DUAL_ABI

namespace gd {
    using namespace geode::stl;

    void* operatorNew(size_t size);
    void operatorDelete(void* ptr);

    template <typename T>
    class allocator : public std::allocator<T> {
    public:
        typedef size_t size_type;
        typedef T* pointer;
        typedef const T* const_pointer;

        template<typename _Tp1>
        struct rebind {
            typedef allocator<_Tp1> other;
        };

        pointer allocate(size_type n, const void *hint=0) {
            return (pointer)operatorNew(n * sizeof(T));
        }

        void deallocate(pointer p, size_type n) {
            return operatorDelete(p);
        }

        allocator() throw(): std::allocator<T>() { }
        allocator(const allocator &a) throw(): std::allocator<T>(a) { }
        template <class U>
        allocator(const allocator<U> &a) throw(): std::allocator<T>(a) { }
        ~allocator() throw() { }
    };

    template <typename K, typename V>
    class GEODE_DLL map {
    protected:
        std::less<K> compare;
        _rb_tree_base m_header;
        size_t m_nodecount;

    public:
        typedef _rb_tree_node<std::pair<K, V>>* _tree_node;
        typedef _rb_tree_iterator<std::pair<K, V>> iterator;

        std::map<K, V> std() {
            return (std::map<K, V>)(*this);
        }

        operator std::map<K, V>() {
            auto iter_node = static_cast<_tree_node>(m_header.m_left);
            auto end_node = static_cast<_tree_node>(&m_header);
            std::map<K, V> out;
            for (; iter_node != end_node;
                iter_node = static_cast<_tree_node>(_rb_increment(iter_node))) {
                out[iter_node->m_value.first] = iter_node->m_value.second;
            }

            return out;
        }

        operator std::map<K, V>() const {
            auto iter_node = static_cast<_tree_node>(m_header.m_left);
            auto end_node = (_tree_node)(&m_header);
            std::map<K, V> out;
            for (; iter_node != end_node;
                iter_node = static_cast<_tree_node>(_rb_increment(iter_node))) {
                out[iter_node->m_value.first] = iter_node->m_value.second;
            }

            return out;
        }

        void insert(_tree_node x, _tree_node p, std::pair<K, V> const& val) {
            bool insert_left =
                (x != 0 || p == static_cast<_tree_node>(&m_header) || val.first < p->m_value.first);

            _tree_node z = new _rb_tree_node<std::pair<K, V>>();
            z->m_value = val;

            _rb_insert_rebalance(insert_left, z, p, m_header);
            ++m_nodecount;
        }

        void insert(std::pair<K, V> const& val) {
            insert_pair(val);
        }

        void insert_pair(std::pair<K, V> const& val) {
            _tree_node x = static_cast<_tree_node>(m_header.m_parent);
            _tree_node y = static_cast<_tree_node>(&m_header);
            bool comp = true;
            while (x != 0) {
                y = x;
                comp = val.first < x->m_value.first;
                x = comp ? static_cast<_tree_node>(x->m_left) : static_cast<_tree_node>(x->m_right);
            }
            auto iter = y;

            if (comp) {
                if (iter == static_cast<_tree_node>(m_header.m_left)) {
                    insert(x, y, val);
                }
                else {
                    iter = static_cast<_tree_node>(_rb_decrement(iter));
                }
            }
            if (iter->m_value.first < val.first) {
                insert(x, y, val);
            }
        }

        map(std::map<K, V> input) {
            m_header.m_isblack = false;
            m_header.m_parent = 0;
            m_header.m_left = &m_header;
            m_header.m_right = &m_header;

            for (auto i : input) {
                insert_pair(i);
            }
        }

        void erase(_tree_node x) {
            while (x != 0) {
                erase(static_cast<_tree_node>(x->m_right));
                auto y = static_cast<_tree_node>(x->m_left);
                delete y;
                x = y;
            }
        }

        std::pair<iterator, iterator> equal_range(K const& __k) {
            return std::pair<iterator, iterator>(lower_bound(__k), upper_bound(__k));
        }

        size_t erase(K const& __x) {
            std::pair<iterator, iterator> __p = equal_range(__x);
            size_t __old = size();
            erase(__p.first, __p.second);
            return __old - size();
        }

        void clear() {
            erase(static_cast<_tree_node>(m_header.m_parent));
            m_header.m_parent = 0;
            m_header.m_left = &m_header;
            m_header.m_right = &m_header;
            m_nodecount = 0;
        }

        void erase(iterator __first, iterator __last) {
            if (__first == begin() && __last == end()) {
                clear();
            }
            else {
                while (__first != __last) {
                    erase(__first++);
                }
            }
        }

        void erase(iterator __pos) {
            _tree_node __y = static_cast<_tree_node>(_rb_rebalance_for_erase(
                __pos.m_node, m_header
            ));
            delete __y;
            --m_nodecount;
        }

        V& operator[](K const& __k) {
            iterator __i = lower_bound(__k);
            if (__i == end() || compare(__k, (*__i).first)) {
                insert_pair(std::pair<K, V>(__k, V()));
                __i = lower_bound(__k);
            }
            return (*__i).second;
        }

        V& at(K const& __k) {
            iterator __i = lower_bound(__k);
            if (__i == end() || compare(__k, (*__i).first)) {
                throw std::out_of_range("map::at");
            }

            return (*__i).second;
        }

        const V& at(K const& __k) const {
            iterator __i = lower_bound(__k);
            if (__i == end() || compare(__k, (*__i).first)) {
                throw std::out_of_range("map::at");
            }

            return (*__i).second;
        }

        iterator begin() noexcept {
            return iterator(m_header.m_left);
        }

        iterator end() noexcept {
            return iterator(&m_header);
        }

        bool empty() const noexcept {
            return m_nodecount == 0;
        }

        size_t size() const noexcept {
            return m_nodecount;
        }

        iterator lower_bound(K const& __x) {
            _tree_node __j = static_cast<_tree_node>(m_header.m_parent);
            _tree_node __k = static_cast<_tree_node>(&m_header);
            while (__j != nullptr) {
                if (!compare(__j->m_value.first, __x)) {
                    __k = __j;
                    __j = static_cast<_tree_node>(__j->m_left);
                }
                else {
                    __j = static_cast<_tree_node>(__j->m_right);
                }
            }
            return iterator(__k);
        }

        iterator upper_bound(K const& __x) {
            _tree_node __j = static_cast<_tree_node>(m_header.m_parent);
            _tree_node __k = static_cast<_tree_node>(&m_header);
            while (__j != nullptr) {
                if (compare(__x, __j->m_value.first)) {
                    __k = __j;
                    __j = static_cast<_tree_node>(__j->m_left);
                }
                else {
                    __j = static_cast<_tree_node>(__j->m_right);
                }
            }
            return iterator(__k);
        }

        iterator find(K const& __x) {
            iterator __j = lower_bound(__x);
            return (__j == end() || compare(__x, (*__j).first)) ? end() : __j;
        }

        size_t count(K const& __x) {
            return find(__x) != end() ? 1 : 0;
        }

        bool contains(K const& __x) {
            return count(__x) > 0;
        }

        map(map const& lol) : map(std::map<K, V>(lol)) {}

        map() : map(std::map<K, V>()) {}

        ~map() {
            erase(static_cast<_tree_node>(m_header.m_parent));
        }
    };

    // template <class Type>
    // using vector = std::vector<Type>;

    template <typename T>
    class GEODE_DLL vector {
    public:
        using value_type = T;
        using iterator = T*;
        using const_iterator = const T*;

        auto allocator() const {
            return gd::allocator<T>();
        }

        operator std::vector<T>() const {
            return std::vector<T>(m_start, m_finish);
        }

        vector() {
            m_start = nullptr;
            m_finish = nullptr;
            m_reserveEnd = nullptr;
        }

        std::size_t nextCapacity(std::size_t x) {
            // minimum 16, powers of 2, don't use builtins
            if (x < 16) return 16;
            std::size_t out = 16;
            while (out < x) {
                out *= 2;
            }
            return out;
        }

        vector(std::vector<T> const& input) : vector() {
            if (input.size()) {
                auto capacity = nextCapacity(input.size());
                m_start = this->allocator().allocate(capacity);
                m_finish = m_start + input.size();
                m_reserveEnd = m_start + capacity;

                std::uninitialized_default_construct(m_start, m_finish);
                std::copy(input.begin(), input.end(), m_start);
            }
        }

        vector(gd::vector<T> const& input) : vector() {
            if (input.size()) {
                auto capacity = nextCapacity(input.size());
                m_start = this->allocator().allocate(capacity);
                m_finish = m_start + input.size();
                m_reserveEnd = m_start + capacity;

                std::uninitialized_default_construct(m_start, m_finish);
                std::copy(input.begin(), input.end(), m_start);
            }
        }

        vector(gd::vector<T>&& input) : vector() {
            m_start = input.m_start;
            m_finish = input.m_finish;
            m_reserveEnd = input.m_reserveEnd;

            input.m_start = nullptr;
            input.m_finish = nullptr;
            input.m_reserveEnd = nullptr;
        }

        vector& operator=(gd::vector<T> const& input) {
            this->clear();

            if (input.size()) {
                auto capacity = nextCapacity(input.size());
                m_start = this->allocator().allocate(capacity);
                m_finish = m_start + input.size();
                m_reserveEnd = m_start + capacity;

                std::uninitialized_default_construct(m_start, m_finish);
                std::copy(input.begin(), input.end(), m_start);
            }

            return *this;
        }

        vector& operator=(gd::vector<T>&& input) {
            m_start = input.m_start;
            m_finish = input.m_finish;
            m_reserveEnd = input.m_reserveEnd;

            input.m_start = nullptr;
            input.m_finish = nullptr;
            input.m_reserveEnd = nullptr;

            return *this;
        }

        void grow() {
            if (m_finish == m_reserveEnd) {
                auto newSize = this->capacity() * 2;
                auto newStart = this->allocator().allocate(newSize);
                auto newFinish = newStart + this->size();

                std::uninitialized_default_construct(newStart, newFinish);
                std::copy(m_start, m_finish, newStart);

                std::destroy(m_start, m_finish);
                this->allocator().deallocate(m_start, this->capacity());

                m_start = newStart;
                m_finish = newFinish;
                m_reserveEnd = newStart + newSize;
            }
        }

        void shrink() {
            if (m_finish < m_reserveEnd / 2 && this->capacity() > 16) {
                auto newSize = this->capacity() / 2;
                auto newStart = this->allocator().allocate(newSize);
                auto newFinish = newStart + this->size();

                std::uninitialized_default_construct(newStart, newFinish);
                std::copy(m_start, m_finish, newStart);

                std::destroy(m_start, m_finish);
                this->allocator().deallocate(m_start, this->capacity());

                m_start = newStart;
                m_finish = newFinish;
                m_reserveEnd = newStart + newSize;
            }
        }

        iterator erase(iterator pos)
        {
            return erase(pos, pos + 1);
        }

        iterator erase(const_iterator pos)
        {
            return erase(pos, pos + 1);
        }

        iterator erase(iterator first, iterator last)
        {
            std::move(last, m_finish, first);

            --m_finish;

            return first;
        }

        iterator erase(const_iterator first, const_iterator last)
        {
            std::move(last, m_finish, first);

            --m_finish;

            return first;
        }

        void push_back(T const& input) {
            this->grow();

            new (m_finish) T(input);
            ++m_finish;
        }

        void push_back(T&& input) {
            this->grow();

            new (m_finish) T(std::move(input));
            ++m_finish;
        }

        void pop_back() {
            if (m_finish != m_start) {
                --m_finish;
                m_finish->~T();
            }

            this->shrink();
        }

        vector(std::initializer_list<T> const& input) : vector() {
            if (input.size()) {
                auto capacity = nextCapacity(input.size());
                m_start = this->allocator().allocate(capacity);
                m_finish = m_start + input.size();
                m_reserveEnd = m_start + capacity;

                std::uninitialized_default_construct(m_start, m_finish);
                std::copy(input.begin(), input.end(), m_start);
            }
        }

        void clear() {
            if (m_start) {
                std::destroy(m_start, m_finish);

                this->allocator().deallocate(m_start, this->capacity());
            }

            m_start = nullptr;
            m_finish = nullptr;
            m_reserveEnd = nullptr;
        }

        T& operator[](size_t index) {
            return m_start[index];
        }

        T const& operator[](size_t index) const {
            return m_start[index];
        }

        T& at(size_t index) {
            if (index >= this->size()) {
                throw std::out_of_range("gd::vector::at");
            }
            return m_start[index];
        }

        T const& at(size_t index) const {
            if (index >= this->size()) {
                throw std::out_of_range("gd::vector::at");
            }
            return m_start[index];
        }

        T& front() {
            return *m_start;
        }

        T* begin() {
            return m_start;
        }

        T* end() {
            return m_finish;
        }

        T const* begin() const {
            return m_start;
        }

        T const* end() const {
            return m_finish;
        }

        ~vector() {
            if (m_start) {
                for (auto& x : *this) {
                    x.~T();
                }
                delete m_start;
            }
        }

        size_t size() const {
            return m_finish - m_start;
        }

        size_t capacity() const {
            return m_reserveEnd - m_start;
        }

    protected:
        T* m_start;
        T* m_finish;
        T* m_reserveEnd;
    };

    struct _bit_reference {
        uintptr_t* m_bitptr;
        uintptr_t m_mask;

        _bit_reference(uintptr_t* x, uintptr_t y) : m_bitptr(x), m_mask(y) {}

        _bit_reference() : m_bitptr(0), m_mask(0) {}

        operator bool() const {
            return !!(*m_bitptr & m_mask);
        }

        _bit_reference& operator=(bool x) {
            if (x) *m_bitptr |= m_mask;
            else *m_bitptr &= ~m_mask;
            return *this;
        }

        _bit_reference& operator=(_bit_reference const& x) {
            return *this = bool(x);
        }

        bool operator==(_bit_reference const& x) const {
            return bool(*this) == bool(x);
        }

        bool operator<(_bit_reference const& x) const {
            return !bool(*this) && bool(x);
        }

        void flip() {
            *m_bitptr ^= m_mask;
        }
    };

    struct _bit_iterator {
        uintptr_t* m_bitptr;
        unsigned int m_offset;

        _bit_iterator(uintptr_t* x) : m_bitptr(x), m_offset(0) {}

        _bit_iterator(uintptr_t* x, unsigned o) : m_bitptr(x), m_offset(o) {}

        _bit_reference operator*() const {
            return _bit_reference(m_bitptr, 1UL << m_offset);
        }

        _bit_iterator& operator++() {
            if (m_offset++ == sizeof(uintptr_t) - 1) {
                m_offset = 0;
                m_bitptr++;
            }
            return *this;
        }

        bool operator!=(_bit_iterator const& b) {
            return !(m_bitptr == b.m_bitptr && m_offset == b.m_offset);
        }
    };

    template <>
    class vector<bool> {
    protected:
        _bit_iterator m_start;
        _bit_iterator m_end;
        uintptr_t* m_capacity_end;

    public:
        auto allocator() const {
            return gd::allocator<uintptr_t>();
        }

        vector() : m_start(nullptr), m_end(nullptr), m_capacity_end(nullptr) {}

        // vector(std::vector<bool> input) : vector() {
        //     auto realsize = input.size() / int(sizeof(uintptr_t));
        //     auto start = this->allocator().allocate(realsize);

        //     m_start = _bit_iterator(start);
        //     m_end = _bit_iterator(start + realsize, input.size() % sizeof(uintptr_t));
        //     m_capacity_end = start + realsize;

        //     auto itmp = m_start;
        //     for (auto i : input) {
        //         *itmp = i;
        //         ++itmp;
        //     }
        // }

        // vector(vector<bool> const& input) : vector() {

        // }

        // vector() : vector(std::vector<bool>()) {}

        ~vector() {
            delete[] m_start.m_bitptr;
        }

        operator std::vector<bool>() const {
            std::vector<bool> out;
            for (auto i = m_start; i != m_end; ++i) {
                out.push_back(*i);
            }
            return out;
        }

        _bit_reference operator[](size_t index) {
            auto const real_index = index / sizeof(uintptr_t);
            auto const offset = index % sizeof(uintptr_t);
            return _bit_reference(&m_start.m_bitptr[real_index], 1UL << offset);
        }

        bool operator[](size_t index) const {
            return const_cast<vector&>(*this)[index];
        }

        _bit_reference at(size_t index) {
            // TODO: bounds checking
            return this->operator[](index);
        }

        bool at(size_t index) const {
            // TODO: bounds checking
            return this->operator[](index);
        }
    };

    // 2.2 TODO: Implement set, unordered_map and unordered_set

    // the sizes of these are always the same, no matter the type
    template <class V>
    using set = void*[6];

    template <class Key, class Tp, class Hash = geode::stl::hash<Key>, class Pred = geode::stl::equal_to<Key>, class Alloc = std::allocator<std::pair<const Key, Tp>>>
    using unordered_map = geode::stl::unordered_map<Key, Tp, Hash, Pred, Alloc>;

    template <class Value, class Hash = geode::stl::hash<Value>, class Pred = geode::stl::equal_to<Value>, class Alloc = std::allocator<Value>>
    using unordered_set = geode::stl::unordered_set<Value, Hash, Pred, Alloc>;
};

#elif defined(GEODE_IS_IOS)
namespace gd {
    class GEODE_DLL string {
    public:
        string() {}

        string(char const* ok) : m_internal(ok) {}

        string(std::string ok) : m_internal(ok) {}

        operator std::string() {
            return m_internal;
        }

        operator std::string() const {
            return m_internal;
        }

        string(string const& ok) : m_internal(ok) {}

        string& operator=(char const* ok) {
            m_internal = ok;
            return *this;
        }

        string& operator=(string const& ok) {
            m_internal = ok;
            return *this;
        }

        ~string() {}

        char const* c_str() const {
            return m_internal.c_str();
        }

    protected:
        std::string m_internal;
    };

    template <typename T>
    class GEODE_DLL vector {
    public:
        using value_type = T;

        operator std::vector<T>() {
            return m_internal;
        }

        void clear() {
            m_internal.clear();
        }

        operator std::vector<T>() const {
            return m_internal;
        }

        vector(std::vector<T> input) : m_internal(input) {}

        T& front() {
            return m_internal.front();
        }

        vector(vector const& lol) : m_internal(lol) {}

        vector() : m_internal() {}

        ~vector() {}

    protected:
        std::vector<T> m_internal;
    };

    template <typename K, typename V>
    class GEODE_DLL map {
    protected:
        std::map<K, V> m_internal;

    public:
        operator std::map<K, V>() {
            return m_internal;
        }

        operator std::map<K, V>() const {
            return m_internal;
        }

        map(std::map<K, V> input) : m_internal(input) {}

        map(map const& lol) : m_internal(lol) {}

        map() {}

        ~map() {}
    };
}
#endif