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122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
/* see copyright notice in squirrel.h */
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#ifndef _SQUTILS_H_
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#define _SQUTILS_H_
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#include "../../fmt/format.h"
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#include "../../../script/script_fatalerror.hpp"
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#include <type_traits>
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void *sq_vm_malloc(SQUnsignedInteger size);
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void *sq_vm_realloc(void *p,SQUnsignedInteger oldsize,SQUnsignedInteger size);
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void sq_vm_free(void *p,SQUnsignedInteger size);
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#define sq_new(__ptr,__type) {__ptr=(__type *)sq_vm_malloc(sizeof(__type));new (__ptr) __type;}
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#define sq_delete(__ptr,__type) {__ptr->~__type();sq_vm_free(__ptr,sizeof(__type));static_assert(!std::is_base_of<SQRefCounted,__type>());}
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#define sq_delete_refcounted(__ptr,__type) {__ptr->~__type();__ptr->SQDeallocate(__ptr);}
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#define SQ_MALLOC(__size) sq_vm_malloc((__size));
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#define SQ_FREE(__ptr,__size) {sq_vm_free((__ptr),(__size));static_assert(!std::is_base_of<SQRefCounted,std::remove_pointer_t<decltype(__ptr)>>());}
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#define SQ_REALLOC(__ptr,__oldsize,__size) sq_vm_realloc((__ptr),(__oldsize),(__size));
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//sqvector mini vector class, supports objects by value
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template<typename T> class sqvector
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{
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public:
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sqvector()
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{
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_vals = nullptr;
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_size = 0;
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_allocated = 0;
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}
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sqvector(const sqvector<T>& v)
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{
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copy(v);
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}
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void copy(const sqvector<T>& v)
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{
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resize(v._size);
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for(SQUnsignedInteger i = 0; i < v._size; i++) {
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new ((void *)&_vals[i]) T(v._vals[i]);
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}
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_size = v._size;
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}
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~sqvector()
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{
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if(_allocated) {
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/* Break freeing loops, if this vector (indirectly) links to itself. */
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size_t allocated_size = _allocated * sizeof(T);
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_allocated = 0;
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for(size_t i = 0; i < _size; i++)
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_vals[i].~T();
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SQ_FREE(_vals, allocated_size);
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}
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}
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void reserve(SQUnsignedInteger newsize) { _realloc(newsize); }
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void resize(SQUnsignedInteger newsize, const T& fill = T())
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{
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if(newsize > _allocated)
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_realloc(newsize);
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if(newsize > _size) {
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while(_size < newsize) {
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new ((void *)&_vals[_size]) T(fill);
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_size++;
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}
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}
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else{
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for(SQUnsignedInteger i = newsize; i < _size; i++) {
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_vals[i].~T();
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}
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_size = (size_t)newsize;
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}
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}
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void shrinktofit() { if(_size > 4) { _realloc(_size); } }
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T& top() const { return _vals[_size - 1]; }
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inline SQUnsignedInteger size() const { return _size; }
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bool empty() const { return (_size <= 0); }
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inline T &push_back(const T& val = T())
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{
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if(_allocated <= _size)
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_realloc(_size * 2);
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return *(new ((void *)&_vals[_size++]) T(val));
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}
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inline void pop_back()
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{
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_size--; _vals[_size].~T();
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}
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void insert(SQUnsignedInteger idx, const T& val)
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{
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resize(_size + 1);
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for(SQUnsignedInteger i = _size - 1; i > idx; i--) {
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_vals[i] = _vals[i - 1];
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}
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_vals[idx] = val;
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}
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void remove(SQUnsignedInteger idx)
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{
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_vals[idx].~T();
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if(idx < (_size - 1)) {
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memmove(static_cast<void *>(&_vals[idx]), &_vals[idx+1], sizeof(T) * (_size - (size_t)idx - 1));
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}
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_size--;
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}
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SQUnsignedInteger capacity() { return _allocated; }
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inline T &back() const { return _vals[_size - 1]; }
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inline T& operator[](SQUnsignedInteger pos) const{ assert(pos < _allocated); return _vals[pos]; }
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T* _vals;
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private:
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void _realloc(SQUnsignedInteger newsize)
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{
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newsize = (newsize > 0)?newsize:4;
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if (newsize > SIZE_MAX / sizeof(T)) {
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std::string msg = fmt::format("cannot resize to {}", newsize);
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throw Script_FatalError(msg);
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}
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_vals = (T*)SQ_REALLOC(_vals, _allocated * sizeof(T), newsize * sizeof(T));
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_allocated = (size_t)newsize;
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}
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size_t _size;
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size_t _allocated;
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};
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#endif //_SQUTILS_H_
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