sfw/sfwl/core/vmap.h

185 lines
3.5 KiB
C++

//--STRIP
#ifndef VMAP_H
#define VMAP_H
//--STRIP
/*************************************************************************/
/* vmap.h */
/* From https://github.com/Relintai/pandemonium_engine (MIT) */
/*************************************************************************/
//--STRIP
#include "cowdata.h"
#include "core/typedefs.h"
//--STRIP
template <class T, class V>
class VMap {
public:
struct Pair {
T key;
V value;
_FORCE_INLINE_ Pair() {}
_FORCE_INLINE_ Pair(const T &p_key, const V &p_value) {
key = p_key;
value = p_value;
}
};
private:
CowData<Pair> _cowdata;
_FORCE_INLINE_ int _find(const T &p_val, bool &r_exact) const {
r_exact = false;
if (_cowdata.empty()) {
return 0;
}
int low = 0;
int high = _cowdata.size() - 1;
const Pair *a = _cowdata.ptr();
int middle = 0;
#ifdef DEBUG_ENABLED
if (low > high)
ERR_PRINT("low > high, this may be a bug");
#endif
while (low <= high) {
middle = (low + high) / 2;
if (p_val < a[middle].key) {
high = middle - 1; //search low end of array
} else if (a[middle].key < p_val) {
low = middle + 1; //search high end of array
} else {
r_exact = true;
return middle;
}
}
//return the position where this would be inserted
if (a[middle].key < p_val) {
middle++;
}
return middle;
}
_FORCE_INLINE_ int _find_exact(const T &p_val) const {
if (_cowdata.empty()) {
return -1;
}
int low = 0;
int high = _cowdata.size() - 1;
int middle;
const Pair *a = _cowdata.ptr();
while (low <= high) {
middle = (low + high) / 2;
if (p_val < a[middle].key) {
high = middle - 1; //search low end of array
} else if (a[middle].key < p_val) {
low = middle + 1; //search high end of array
} else {
return middle;
}
}
return -1;
}
public:
int insert(const T &p_key, const V &p_val) {
bool exact;
int pos = _find(p_key, exact);
if (exact) {
_cowdata.get_m(pos).value = p_val;
return pos;
}
_cowdata.insert(pos, Pair(p_key, p_val));
return pos;
}
bool has(const T &p_val) const {
return _find_exact(p_val) != -1;
}
void erase(const T &p_val) {
int pos = _find_exact(p_val);
if (pos < 0) {
return;
}
_cowdata.remove(pos);
}
int find(const T &p_val) const {
return _find_exact(p_val);
}
int find_nearest(const T &p_val) const {
if (_cowdata.empty()) {
return -1;
}
bool exact;
return _find(p_val, exact);
}
_FORCE_INLINE_ int size() const { return _cowdata.size(); }
_FORCE_INLINE_ bool empty() const { return _cowdata.empty(); }
const Pair *get_array() const {
return _cowdata.ptr();
}
Pair *get_array() {
return _cowdata.ptrw();
}
const V &getv(int p_index) const {
return _cowdata.get(p_index).value;
}
V &getv(int p_index) {
return _cowdata.get_m(p_index).value;
}
const T &getk(int p_index) const {
return _cowdata.get(p_index).key;
}
T &getk(int p_index) {
return _cowdata.get_m(p_index).key;
}
inline const V &operator[](const T &p_key) const {
int pos = _find_exact(p_key);
CRASH_COND(pos < 0);
return _cowdata.get(pos).value;
}
inline V &operator[](const T &p_key) {
int pos = _find_exact(p_key);
if (pos < 0) {
pos = insert(p_key, V());
}
return _cowdata.get_m(pos).value;
}
_FORCE_INLINE_ VMap(){};
_FORCE_INLINE_ VMap(const VMap &p_from) { _cowdata._ref(p_from._cowdata); }
inline VMap &operator=(const VMap &p_from) {
_cowdata._ref(p_from._cowdata);
return *this;
}
};
//--STRIP
#endif // VMAP_H
//--STRIP