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https://github.com/pocketpy/pocketpy
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WIP: Implemented a int-only deque with limited capabilities
This commit is contained in:
S. Mahmudul Hasan
parent
40399c089d
commit
795c7b65c6
@ -4,22 +4,154 @@
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#include "common.h"
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#include "memory.h"
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#include "str.h"
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#include "iter.h"
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#include "cffi.h"
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namespace pkpy
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{
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struct DequeNode{
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int obj; //TODO: change to PyObject*
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DequeNode* prev;
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DequeNode* next;
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DequeNode(){
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this->obj = -1; // ignored value
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this->prev = nullptr;
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this->next = nullptr;
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}
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DequeNode(int obj){
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this->obj = obj;
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this->prev = nullptr;
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this->next = nullptr;
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}
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~DequeNode(){
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}
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void printNode(){
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printf("%d ", this->obj);
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}
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};
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struct MyDoublyLinkedList{
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int len;
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DequeNode* head;
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DequeNode* tail;
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MyDoublyLinkedList(){ //creates an empty list
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this->len = 0;
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this->head = new DequeNode(); // dummy
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this->tail = new DequeNode(); // dummy
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this->head->next = this->tail;
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this->tail->prev = this->head;
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}
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~MyDoublyLinkedList(){
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if(this->head == nullptr) return;
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this->makeListEmpty();
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delete this->head;
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delete this->tail;
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}
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void push_back(DequeNode* node){
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node->prev = this->tail->prev;
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node->next = this->tail;
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this->tail->prev->next = node;
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this->tail->prev = node;
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this->len++;
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}
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void push_front(DequeNode* node){
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node->prev = this->head;
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node->next = this->head->next;
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this->head->next->prev = node;
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this->head->next = node;
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this->len++;
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}
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DequeNode* pop_back(){
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if(this->empty()) throw std::runtime_error("DoubleLinkedList::pop_back() called on empty list");
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DequeNode* node = this->tail->prev;
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this->tail->prev->prev->next = this->tail;
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this->tail->prev = this->tail->prev->prev;
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this->len--;
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return node;
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}
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DequeNode* pop_front(){
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if(this->empty()) throw std::runtime_error("DoubleLinkedList::pop_front() called on empty list");
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DequeNode* node = this->head->next;
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this->head->next->next->prev = this->head;
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this->head->next = this->head->next->next;
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this->len--;
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return node;
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}
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bool empty() const {
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if(this->len == 0){
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if(this->head->next != this->tail || this->tail->prev != this->head){
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throw std::runtime_error("DoubleLinkedList::size() returned 0 but the list is not empty");
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}
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return true;
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}
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return false;
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}
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int count(int obj){ // TODO: change to PyObject*
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int cnt = 0;
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DequeNode* p = this->head->next;
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while(p != this->tail){
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if(p->obj == obj) cnt++;
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p = p->next;
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}
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return cnt;
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}
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void makeListEmpty(){
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while(!this->empty()){
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this->pop_back();
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}
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}
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void printList(){
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if(this->empty()){
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printf("Empty List\n");
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return;
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}
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DequeNode* p = this->head->next;
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while(p != this->tail){
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p->printNode();
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p = p->next;
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}
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printf("\n");
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}
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};
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// STARTING HERE
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struct PyDeque
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{
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PY_CLASS(PyDeque, collections, deque);
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// some fields can be defined here
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int len;
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MyDoublyLinkedList *dequeItems;
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PyDeque() = default;
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void appendLeft(int item); // TODO: change to PyObject*
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void append(int item); // TODO: change to PyObject*
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int popLeft(); // TODO: change to PyObject*
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int pop(); // TODO: change to PyObject*
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int count(int obj); // TODO: change to PyObject*
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void clear();
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void print(VM *vm);
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PyDeque(): len(0), dequeItems(new MyDoublyLinkedList()){}
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PyDeque(VM *vm) : len(0), dequeItems(new MyDoublyLinkedList()){}
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void printHelloWorld();
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static void _register(VM *vm, PyObject *mod, PyObject *type);
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void _gc_mark() const; // needed for container types
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void _gc_mark() const; // needed for container types
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};
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void add_module_mycollections(VM *vm);
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@ -7,24 +7,142 @@ namespace pkpy
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vm->bind_default_constructor<PyDeque>(type);
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vm->bind(type, "__len__(self) -> int",
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[](VM *vm, ArgsView args){
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PyDeque& self = _CAST(PyDeque&, args[0]);
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return VAR(self.len);
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});
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[](VM *vm, ArgsView args)
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{
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PyDeque &self = _CAST(PyDeque &, args[0]);
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return VAR(self.len);
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});
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vm->bind(type, "printHelloWorld(self) -> None",
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[](VM *vm, ArgsView args){
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PyDeque& self = _CAST(PyDeque&, args[0]);
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self.printHelloWorld();
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return vm->None;
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});
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[](VM *vm, ArgsView args)
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{
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printf("TESTING HELLO WORLD!!\n");
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PyDeque &self = _CAST(PyDeque &, args[0]);
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self.printHelloWorld();
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printf("TESTED HELLO WORLD!!\n");
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return vm->None;
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});
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vm->bind(type, "appendleft(self, item) -> None",
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[](VM *vm, ArgsView args)
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{
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PyDeque &self = _CAST(PyDeque &, args[0]);
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int item = _CAST(int, args[1]); // TODO: change to PyObject*
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self.appendLeft(item);
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return vm->None;
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});
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vm->bind(type, "append(self, item) -> None",
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[](VM *vm, ArgsView args)
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{
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PyDeque &self = _CAST(PyDeque &, args[0]);
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int item = _CAST(int, args[1]); // TODO: change to PyObject*
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self.append(item);
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return vm->None;
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});
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vm->bind(type, "popleft(self) -> PyObject",
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[](VM *vm, ArgsView args)
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{
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PyDeque &self = _CAST(PyDeque &, args[0]);
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int tmp = self.popLeft(); // TODO: change to PyObject*
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return py_var(vm, tmp);
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});
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vm->bind(type,"pop(self) -> PyObject",
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[](VM *vm, ArgsView args)
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{
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PyDeque &self = _CAST(PyDeque &, args[0]);
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int tmp = self.pop(); // TODO: change to PyObject*
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return py_var(vm, tmp);
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});
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vm->bind(type, "count(self, obj) -> int",
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[](VM *vm, ArgsView args)
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{
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PyDeque &self = _CAST(PyDeque &, args[0]);
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int obj = _CAST(int, args[1]); // TODO: change to PyObject*
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int cnt = self.count(obj);
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return VAR(cnt);
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});
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vm->bind(type, "print(self) -> None", // TODO: remove this later
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[](VM *vm, ArgsView args)
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{
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PyDeque &self = _CAST(PyDeque &, args[0]);
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self.print(vm);
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return vm->None;
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});
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vm->bind(type, "clear(self) -> None",
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[](VM *vm, ArgsView args)
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{
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PyDeque &self = _CAST(PyDeque &, args[0]);
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self.clear();
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return vm->None;
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});
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}
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void PyDeque::_gc_mark() const
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{
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// TODO: implement
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}
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void PyDeque::appendLeft(int item) // TODO: change to PyObject*
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{
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DequeNode *node = new DequeNode(item);
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this->dequeItems->push_front(node);
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}
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void PyDeque::append(int item) // TODO: change to PyObject*
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{
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// int val = _CAST(int, item);
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DequeNode *node = new DequeNode(item);
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this->dequeItems->push_back(node);
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}
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int PyDeque::popLeft() // TODO: change to PyObject*
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{
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if (this->dequeItems->empty())
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{
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throw std::runtime_error("pop from an empty deque");
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}
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DequeNode *node = this->dequeItems->pop_front();
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return node->obj;
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}
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int PyDeque::pop() // TODO: change to PyObject*
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{
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if (this->dequeItems->empty())
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{
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throw std::runtime_error("pop from an empty deque");
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}
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DequeNode *node = this->dequeItems->pop_back();
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return node->obj;
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}
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int PyDeque::count(int obj) // TODO: change to PyObject*
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{
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return this->dequeItems->count(obj);
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}
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void PyDeque::clear()
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{
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this->dequeItems->makeListEmpty();
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}
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void PyDeque::print(VM *vm)
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{
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// TODO: Helper function to print the deque, will be removed later
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this->dequeItems->printList();
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}
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void PyDeque::printHelloWorld()
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{
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printf("Hello World!\n");
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return;
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}
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void add_module_mycollections(VM *vm)
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{
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PyObject *mycollections = vm->new_module("collections");
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