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-rw-r--r--core/templates/hashfuncs.h197
1 files changed, 169 insertions, 28 deletions
diff --git a/core/templates/hashfuncs.h b/core/templates/hashfuncs.h
index 2a129f97d5..98ff7fa4ce 100644
--- a/core/templates/hashfuncs.h
+++ b/core/templates/hashfuncs.h
@@ -31,14 +31,22 @@
#ifndef HASHFUNCS_H
#define HASHFUNCS_H
+#include "core/math/aabb.h"
#include "core/math/math_defs.h"
#include "core/math/math_funcs.h"
+#include "core/math/rect2.h"
+#include "core/math/rect2i.h"
+#include "core/math/vector2.h"
+#include "core/math/vector2i.h"
+#include "core/math/vector3.h"
+#include "core/math/vector3i.h"
#include "core/object/object_id.h"
#include "core/string/node_path.h"
#include "core/string/string_name.h"
#include "core/string/ustring.h"
#include "core/templates/rid.h"
#include "core/typedefs.h"
+
/**
* Hashing functions
*/
@@ -48,7 +56,7 @@
* @param C String
* @return 32-bits hashcode
*/
-static inline uint32_t hash_djb2(const char *p_cstr) {
+static _FORCE_INLINE_ uint32_t hash_djb2(const char *p_cstr) {
const unsigned char *chr = (const unsigned char *)p_cstr;
uint32_t hash = 5381;
uint32_t c;
@@ -60,7 +68,7 @@ static inline uint32_t hash_djb2(const char *p_cstr) {
return hash;
}
-static inline uint32_t hash_djb2_buffer(const uint8_t *p_buff, int p_len, uint32_t p_prev = 5381) {
+static _FORCE_INLINE_ uint32_t hash_djb2_buffer(const uint8_t *p_buff, int p_len, uint32_t p_prev = 5381) {
uint32_t hash = p_prev;
for (int i = 0; i < p_len; i++) {
@@ -70,7 +78,7 @@ static inline uint32_t hash_djb2_buffer(const uint8_t *p_buff, int p_len, uint32
return hash;
}
-static inline uint32_t hash_djb2_one_32(uint32_t p_in, uint32_t p_prev = 5381) {
+static _FORCE_INLINE_ uint32_t hash_djb2_one_32(uint32_t p_in, uint32_t p_prev = 5381) {
return ((p_prev << 5) + p_prev) + p_in;
}
@@ -81,7 +89,7 @@ static inline uint32_t hash_djb2_one_32(uint32_t p_in, uint32_t p_prev = 5381) {
* @param p_int - 64-bit unsigned integer key to be hashed
* @return unsigned 32-bit value representing hashcode
*/
-static inline uint32_t hash_one_uint64(const uint64_t p_int) {
+static _FORCE_INLINE_ uint32_t hash_one_uint64(const uint64_t p_int) {
uint64_t v = p_int;
v = (~v) + (v << 18); // v = (v << 18) - v - 1;
v = v ^ (v >> 31);
@@ -92,7 +100,72 @@ static inline uint32_t hash_one_uint64(const uint64_t p_int) {
return uint32_t(v);
}
-static inline uint32_t hash_djb2_one_float(double p_in, uint32_t p_prev = 5381) {
+// Murmurhash3 32-bit version.
+// All MurmurHash versions are public domain software, and the author disclaims all copyright to their code.
+
+static _FORCE_INLINE_ uint32_t rotl32(uint32_t x, int8_t r) {
+ return (x << r) | (x >> (32 - r));
+}
+
+static _FORCE_INLINE_ uint32_t fmix32(uint32_t h) {
+ h ^= h >> 16;
+ h *= 0x85ebca6b;
+ h ^= h >> 13;
+ h *= 0xc2b2ae35;
+ h ^= h >> 16;
+
+ return h;
+}
+
+static _FORCE_INLINE_ uint32_t hash_murmur3_32(const void *key, int length, const uint32_t seed = 0x7F07C65) {
+ // Although not required, this is a random prime number.
+ const uint8_t *data = (const uint8_t *)key;
+ const int nblocks = length / 4;
+
+ uint32_t h1 = seed;
+
+ const uint32_t c1 = 0xcc9e2d51;
+ const uint32_t c2 = 0x1b873593;
+
+ const uint32_t *blocks = (const uint32_t *)(data + nblocks * 4);
+
+ for (int i = -nblocks; i; i++) {
+ uint32_t k1 = blocks[i];
+
+ k1 *= c1;
+ k1 = rotl32(k1, 15);
+ k1 *= c2;
+
+ h1 ^= k1;
+ h1 = rotl32(h1, 13);
+ h1 = h1 * 5 + 0xe6546b64;
+ }
+
+ const uint8_t *tail = (const uint8_t *)(data + nblocks * 4);
+
+ uint32_t k1 = 0;
+
+ switch (length & 3) {
+ case 3:
+ k1 ^= tail[2] << 16;
+ [[fallthrough]];
+ case 2:
+ k1 ^= tail[1] << 8;
+ [[fallthrough]];
+ case 1:
+ k1 ^= tail[0];
+ k1 *= c1;
+ k1 = rotl32(k1, 15);
+ k1 *= c2;
+ h1 ^= k1;
+ };
+
+ // Finalize with additional bit mixing.
+ h1 ^= length;
+ return fmix32(h1);
+}
+
+static _FORCE_INLINE_ uint32_t hash_djb2_one_float(double p_in, uint32_t p_prev = 5381) {
union {
double d;
uint64_t i;
@@ -111,7 +184,7 @@ static inline uint32_t hash_djb2_one_float(double p_in, uint32_t p_prev = 5381)
}
template <class T>
-static inline uint32_t make_uint32_t(T p_in) {
+static _FORCE_INLINE_ uint32_t make_uint32_t(T p_in) {
union {
T t;
uint32_t _u32;
@@ -121,7 +194,7 @@ static inline uint32_t make_uint32_t(T p_in) {
return _u._u32;
}
-static inline uint64_t hash_djb2_one_float_64(double p_in, uint64_t p_prev = 5381) {
+static _FORCE_INLINE_ uint64_t hash_djb2_one_float_64(double p_in, uint64_t p_prev = 5381) {
union {
double d;
uint64_t i;
@@ -139,12 +212,12 @@ static inline uint64_t hash_djb2_one_float_64(double p_in, uint64_t p_prev = 538
return ((p_prev << 5) + p_prev) + u.i;
}
-static inline uint64_t hash_djb2_one_64(uint64_t p_in, uint64_t p_prev = 5381) {
+static _FORCE_INLINE_ uint64_t hash_djb2_one_64(uint64_t p_in, uint64_t p_prev = 5381) {
return ((p_prev << 5) + p_prev) + p_in;
}
template <class T>
-static inline uint64_t make_uint64_t(T p_in) {
+static _FORCE_INLINE_ uint64_t make_uint64_t(T p_in) {
union {
T t;
uint64_t _u64;
@@ -155,30 +228,44 @@ static inline uint64_t make_uint64_t(T p_in) {
return _u._u64;
}
+template <class T>
+class Ref;
+
struct HashMapHasherDefault {
+ // Generic hash function for any type.
+ template <class T>
+ static _FORCE_INLINE_ uint32_t hash(const T *p_pointer) { return hash_one_uint64((uint64_t)p_pointer); }
+
+ template <class T>
+ static _FORCE_INLINE_ uint32_t hash(const Ref<T> &p_ref) { return hash_one_uint64((uint64_t)p_ref.operator->()); }
+
static _FORCE_INLINE_ uint32_t hash(const String &p_string) { return p_string.hash(); }
static _FORCE_INLINE_ uint32_t hash(const char *p_cstr) { return hash_djb2(p_cstr); }
- static _FORCE_INLINE_ uint32_t hash(const uint64_t p_int) { return hash_one_uint64(p_int); }
- static _FORCE_INLINE_ uint32_t hash(const ObjectID &p_id) { return hash_one_uint64(p_id); }
-
- static _FORCE_INLINE_ uint32_t hash(const int64_t p_int) { return hash(uint64_t(p_int)); }
- static _FORCE_INLINE_ uint32_t hash(const float p_float) { return hash_djb2_one_float(p_float); }
- static _FORCE_INLINE_ uint32_t hash(const double p_double) { return hash_djb2_one_float(p_double); }
- static _FORCE_INLINE_ uint32_t hash(const uint32_t p_int) { return p_int; }
- static _FORCE_INLINE_ uint32_t hash(const int32_t p_int) { return (uint32_t)p_int; }
- static _FORCE_INLINE_ uint32_t hash(const uint16_t p_int) { return p_int; }
- static _FORCE_INLINE_ uint32_t hash(const int16_t p_int) { return (uint32_t)p_int; }
- static _FORCE_INLINE_ uint32_t hash(const uint8_t p_int) { return p_int; }
- static _FORCE_INLINE_ uint32_t hash(const int8_t p_int) { return (uint32_t)p_int; }
- static _FORCE_INLINE_ uint32_t hash(const wchar_t p_wchar) { return (uint32_t)p_wchar; }
- static _FORCE_INLINE_ uint32_t hash(const char16_t p_uchar) { return (uint32_t)p_uchar; }
- static _FORCE_INLINE_ uint32_t hash(const char32_t p_uchar) { return (uint32_t)p_uchar; }
+ static _FORCE_INLINE_ uint32_t hash(const wchar_t p_wchar) { return fmix32(p_wchar); }
+ static _FORCE_INLINE_ uint32_t hash(const char16_t p_uchar) { return fmix32(p_uchar); }
+ static _FORCE_INLINE_ uint32_t hash(const char32_t p_uchar) { return fmix32(p_uchar); }
static _FORCE_INLINE_ uint32_t hash(const RID &p_rid) { return hash_one_uint64(p_rid.get_id()); }
-
static _FORCE_INLINE_ uint32_t hash(const StringName &p_string_name) { return p_string_name.hash(); }
static _FORCE_INLINE_ uint32_t hash(const NodePath &p_path) { return p_path.hash(); }
+ static _FORCE_INLINE_ uint32_t hash(const ObjectID &p_id) { return hash_one_uint64(p_id); }
- //static _FORCE_INLINE_ uint32_t hash(const void* p_ptr) { return uint32_t(uint64_t(p_ptr))*(0x9e3779b1L); }
+ static _FORCE_INLINE_ uint32_t hash(const uint64_t p_int) { return hash_one_uint64(p_int); }
+ static _FORCE_INLINE_ uint32_t hash(const int64_t p_int) { return hash_one_uint64(p_int); }
+ static _FORCE_INLINE_ uint32_t hash(const float p_float) { return hash_djb2_one_float(p_float); }
+ static _FORCE_INLINE_ uint32_t hash(const double p_double) { return hash_djb2_one_float(p_double); }
+ static _FORCE_INLINE_ uint32_t hash(const uint32_t p_int) { return fmix32(p_int); }
+ static _FORCE_INLINE_ uint32_t hash(const int32_t p_int) { return fmix32(p_int); }
+ static _FORCE_INLINE_ uint32_t hash(const uint16_t p_int) { return fmix32(p_int); }
+ static _FORCE_INLINE_ uint32_t hash(const int16_t p_int) { return fmix32(p_int); }
+ static _FORCE_INLINE_ uint32_t hash(const uint8_t p_int) { return fmix32(p_int); }
+ static _FORCE_INLINE_ uint32_t hash(const int8_t p_int) { return fmix32(p_int); }
+ static _FORCE_INLINE_ uint32_t hash(const Vector2i &p_vec) { return hash_murmur3_32(&p_vec, sizeof(Vector2i)); }
+ static _FORCE_INLINE_ uint32_t hash(const Vector3i &p_vec) { return hash_murmur3_32(&p_vec, sizeof(Vector3i)); }
+ static _FORCE_INLINE_ uint32_t hash(const Vector2 &p_vec) { return hash_murmur3_32(&p_vec, sizeof(Vector2)); }
+ static _FORCE_INLINE_ uint32_t hash(const Vector3 &p_vec) { return hash_murmur3_32(&p_vec, sizeof(Vector3)); }
+ static _FORCE_INLINE_ uint32_t hash(const Rect2i &p_rect) { return hash_murmur3_32(&p_rect, sizeof(Rect2i)); }
+ static _FORCE_INLINE_ uint32_t hash(const Rect2 &p_rect) { return hash_murmur3_32(&p_rect, sizeof(Rect2)); }
+ static _FORCE_INLINE_ uint32_t hash(const AABB &p_aabb) { return hash_murmur3_32(&p_aabb, sizeof(AABB)); }
};
template <typename T>
@@ -186,14 +273,68 @@ struct HashMapComparatorDefault {
static bool compare(const T &p_lhs, const T &p_rhs) {
return p_lhs == p_rhs;
}
+};
- bool compare(const float &p_lhs, const float &p_rhs) {
+template <>
+struct HashMapComparatorDefault<float> {
+ static bool compare(const float &p_lhs, const float &p_rhs) {
return (p_lhs == p_rhs) || (Math::is_nan(p_lhs) && Math::is_nan(p_rhs));
}
+};
- bool compare(const double &p_lhs, const double &p_rhs) {
+template <>
+struct HashMapComparatorDefault<double> {
+ static bool compare(const double &p_lhs, const double &p_rhs) {
return (p_lhs == p_rhs) || (Math::is_nan(p_lhs) && Math::is_nan(p_rhs));
}
};
+template <>
+struct HashMapComparatorDefault<Vector2> {
+ static bool compare(const Vector2 &p_lhs, const Vector2 &p_rhs) {
+ return ((p_lhs.x == p_rhs.x) || (Math::is_nan(p_lhs.x) && Math::is_nan(p_rhs.x))) && ((p_lhs.y == p_rhs.y) || (Math::is_nan(p_lhs.y) && Math::is_nan(p_rhs.y)));
+ }
+};
+
+template <>
+struct HashMapComparatorDefault<Vector3> {
+ static bool compare(const Vector3 &p_lhs, const Vector3 &p_rhs) {
+ return ((p_lhs.x == p_rhs.x) || (Math::is_nan(p_lhs.x) && Math::is_nan(p_rhs.x))) && ((p_lhs.y == p_rhs.y) || (Math::is_nan(p_lhs.y) && Math::is_nan(p_rhs.y))) && ((p_lhs.z == p_rhs.z) || (Math::is_nan(p_lhs.z) && Math::is_nan(p_rhs.z)));
+ }
+};
+
+constexpr uint32_t HASH_TABLE_SIZE_MAX = 29;
+
+const uint32_t hash_table_size_primes[HASH_TABLE_SIZE_MAX] = {
+ 5,
+ 13,
+ 23,
+ 47,
+ 97,
+ 193,
+ 389,
+ 769,
+ 1543,
+ 3079,
+ 6151,
+ 12289,
+ 24593,
+ 49157,
+ 98317,
+ 196613,
+ 393241,
+ 786433,
+ 1572869,
+ 3145739,
+ 6291469,
+ 12582917,
+ 25165843,
+ 50331653,
+ 100663319,
+ 201326611,
+ 402653189,
+ 805306457,
+ 1610612741,
+};
+
#endif // HASHFUNCS_H
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-08 08:30:14 +0000