hash: Add murmurhash, remove some dead functions
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94057baad2
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369
Code/Dqn.h
369
Code/Dqn.h
@ -859,28 +859,13 @@ DQN_API Dqn_b32 Dqn_Rect_ContainsPoint (Dqn_Rect const &rect, Dqn_V2 const
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DQN_API Dqn_b32 Dqn_Rect_ContainsRect (Dqn_Rect const &a, Dqn_Rect const &b);
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DQN_API Dqn_V2 Dqn_Rect_Size (Dqn_Rect const &rect);
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DQN_API Dqn_Rect Dqn_Rect_Move (Dqn_Rect const &src, Dqn_V2 const &move_amount);
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DQN_API Dqn_Rect Dqn_Rect_MoveTo (Dqn_Rect const &src, Dqn_V2 const &dest);
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DQN_API Dqn_b32 Dqn_Rect_Intersects (Dqn_Rect const &a, Dqn_Rect const &b);
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DQN_API Dqn_Rect Dqn_Rect_Intersection (Dqn_Rect const &a, Dqn_Rect const &b);
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DQN_API Dqn_Rect Dqn_Rect_Union (Dqn_Rect const &a, Dqn_Rect const &b);
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DQN_API Dqn_Rect Dqn_Rect_FromRectI32 (Dqn_RectI32 const &a);
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DQN_API Dqn_V2I Dqn_RectI32_Size (Dqn_RectI32 const &rect);
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union Dqn_Mat4
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{
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Dqn_f32 e[16];
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Dqn_V4 row[4];
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Dqn_f32 row_major[4][4];
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Dqn_f32 operator[](Dqn_usize i) const { return e[i]; }
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};
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DQN_API Dqn_Mat4 Dqn_Mat4_Identity ();
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DQN_API Dqn_Mat4 Dqn_Mat4_Scale3f (Dqn_f32 x, Dqn_f32 y, Dqn_f32 z);
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DQN_API Dqn_Mat4 Dqn_Mat4_ScaleV3 (Dqn_V3 vec);
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DQN_API Dqn_Mat4 Dqn_Mat4_Translate3f(Dqn_f32 x, Dqn_f32 y, Dqn_f32 z);
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DQN_API Dqn_Mat4 Dqn_Mat4_TranslateV3(Dqn_V3 vec);
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DQN_API Dqn_Mat4 operator* (Dqn_Mat4 const &a, Dqn_Mat4 const &b);
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DQN_API Dqn_V4 operator* (Dqn_Mat4 const &mat, Dqn_V4 const &vec);
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// -------------------------------------------------------------------------------------------------
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//
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// NOTE: Math Utils
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@ -1317,7 +1302,8 @@ DQN_API char Dqn_Char_ToLower (char ch);
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// NOTE: String
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//
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// -------------------------------------------------------------------------------------------------
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#define DQN_STRING_LITERAL(string) Dqn_String_Init(string, Dqn_CharCountI(string))
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#define DQN_STRING(string) Dqn_String_Init(string, Dqn_CharCountI(string))
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#define DQN_STRING_FMT(string) (string).size, (string).str
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struct Dqn_String
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{
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union {
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@ -2158,7 +2144,7 @@ DQN_API Dqn_b32 Dqn_FixedString_Append(Dqn_FixedString<MAX_> *str, Dqn_String sr
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template <Dqn_isize MAX_>
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DQN_API Dqn_String Dqn_FixedString_ToString(Dqn_FixedString<MAX_> const *str)
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{
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Dqn_String result = { str->str, str->size };
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auto result = Dqn_String_Init(str->str, str->size);
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return result;
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}
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@ -2281,6 +2267,26 @@ DQN_API Dqn_u64 Dqn_FNV1A64_Hash (void const *bytes, Dqn_isize size);
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DQN_API Dqn_u32 Dqn_FNV1A32_Iterate (void const *bytes, Dqn_isize size, Dqn_u32 hash);
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DQN_API Dqn_u64 Dqn_FNV1A64_Iterate (void const *bytes, Dqn_isize size, Dqn_u64 hash);
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// -------------------------------------------------------------------------------------------------
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//
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// NOTE: Hashing - Dqn_MurmurHash3
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//
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// -------------------------------------------------------------------------------------------------
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//
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// MurmurHash3 was written by Austin Appleby, and is placed in the public
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// domain. The author hereby disclaims copyright to this source code.
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//
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// Note - The x86 and x64 versions do _not_ produce the same results, as the
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// algorithms are optimized for their respective platforms. You can still
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// compile and run any of them on any platform, but your performance with the
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// non-native version will be less than optimal.
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struct Dqn_MurmurHash3_128 { Dqn_u64 e[2]; };
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DQN_API Dqn_u32 Dqn_MurmurHash3_x86_32 (void const *key, int len, Dqn_u32 seed);
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DQN_API Dqn_MurmurHash3_128 Dqn_MurmurHash3_x64_128(void const *key, int len, Dqn_u32 seed);
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#define DQN_MURMUR_HASH3_U128_AS_U64(key, len, seed) (Dqn_MurmurHash3_x64_128(key, len, seed).e[0])
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#endif // DQN_H
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// -------------------------------------------------------------------------------------------------
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@ -2607,6 +2613,15 @@ DQN_API Dqn_Rect Dqn_Rect_Move(Dqn_Rect const &src, Dqn_V2 const &move_amount)
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return result;
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}
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DQN_API Dqn_Rect Dqn_Rect_MoveTo(Dqn_Rect const &src, Dqn_V2 const &dest)
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{
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Dqn_V2 move_amount = dest - src.min;
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Dqn_Rect result = src;
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result.min += move_amount;
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result.max += move_amount;
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return result;
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}
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DQN_API Dqn_b32 Dqn_Rect_Intersects(Dqn_Rect const &a, Dqn_Rect const &b)
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{
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Dqn_b32 result = (a.min.x <= b.max.x && a.max.x >= b.min.x) &&
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@ -2650,93 +2665,6 @@ DQN_API Dqn_V2I Dqn_RectI32_Size(Dqn_RectI32 const &rect)
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return result;
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}
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// -------------------------------------------------------------------------------------------------
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//
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// NOTE: Dqn_Mat4
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//
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// -------------------------------------------------------------------------------------------------
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DQN_API Dqn_Mat4 Dqn_Mat4_Identity()
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{
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Dqn_Mat4 result =
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{
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1, 0, 0, 0,
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0, 1, 0, 0,
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0, 0, 1, 0,
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0, 0, 0, 1,
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};
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return result;
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}
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DQN_API Dqn_Mat4 Dqn_Mat4_Scale3f(Dqn_f32 x, Dqn_f32 y, Dqn_f32 z)
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{
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Dqn_Mat4 result =
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{
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x, 0, 0, 0,
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0, y, 0, 0,
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0, 0, z, 0,
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0, 0, 0, 1,
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};
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return result;
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}
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DQN_API Dqn_Mat4 Dqn_Mat4_ScaleV3(Dqn_V3 vec)
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{
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Dqn_Mat4 result = Dqn_Mat4_Scale3f(vec.x, vec.y, vec.z);
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return result;
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}
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DQN_API Dqn_Mat4 Dqn_Mat4_Translate3f(Dqn_f32 x, Dqn_f32 y, Dqn_f32 z)
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{
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Dqn_Mat4 result =
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{
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1, 0, 0, x,
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0, 1, 0, y,
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0, 0, 1, z,
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0, 0, 0, 1,
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};
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return result;
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}
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DQN_API Dqn_Mat4 Dqn_Mat4_TranslateV3(Dqn_V3 vec)
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{
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Dqn_Mat4 result = Dqn_Mat4_Translate3f(vec.x, vec.y, vec.z);
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return result;
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}
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DQN_API Dqn_Mat4 operator*(Dqn_Mat4 const &a, Dqn_Mat4 const &b)
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{
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Dqn_V4 const *row1 = a.row + 0;
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Dqn_V4 const *row2 = a.row + 1;
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Dqn_V4 const *row3 = a.row + 2;
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Dqn_V4 const *row4 = a.row + 3;
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Dqn_V4 const col1 = Dqn_V4(b.row_major[0][0], b.row_major[1][0], b.row_major[2][0], b.row_major[3][0]);
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Dqn_V4 const col2 = Dqn_V4(b.row_major[0][1], b.row_major[1][1], b.row_major[2][1], b.row_major[3][1]);
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Dqn_V4 const col3 = Dqn_V4(b.row_major[0][2], b.row_major[1][2], b.row_major[2][2], b.row_major[3][3]);
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Dqn_V4 const col4 = Dqn_V4(b.row_major[0][3], b.row_major[1][3], b.row_major[2][3], b.row_major[3][3]);
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Dqn_Mat4 result =
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{
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Dqn_V4_Dot(row1, &col1), Dqn_V4_Dot(row1, &col2), Dqn_V4_Dot(row1, &col3), Dqn_V4_Dot(row1, &col4),
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Dqn_V4_Dot(row2, &col1), Dqn_V4_Dot(row2, &col2), Dqn_V4_Dot(row2, &col3), Dqn_V4_Dot(row2, &col4),
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Dqn_V4_Dot(row3, &col1), Dqn_V4_Dot(row3, &col2), Dqn_V4_Dot(row3, &col3), Dqn_V4_Dot(row3, &col4),
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Dqn_V4_Dot(row4, &col1), Dqn_V4_Dot(row4, &col2), Dqn_V4_Dot(row4, &col3), Dqn_V4_Dot(row4, &col4),
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};
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return result;
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}
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DQN_API Dqn_V4 operator*(Dqn_Mat4 const &mat, Dqn_V4 const &vec)
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{
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Dqn_f32 x = vec.x, y = vec.y, z = vec.z, w = vec.w;
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Dqn_V4 result =
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{
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(mat[0] * x) + (mat[1] * y) + (mat[2] * z) + (mat[3] * w),
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(mat[4] * x) + (mat[5] * y) + (mat[6] * z) + (mat[7] * w),
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(mat[8] * x) + (mat[9] * y) + (mat[10] * z) + (mat[11] * w),
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(mat[12] * x) + (mat[13] * y) + (mat[14] * z) + (mat[15] * w),
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};
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return result;
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}
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// -------------------------------------------------------------------------------------------------
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//
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// NOTE: Math Utils
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@ -3388,9 +3316,12 @@ DQN_API char Dqn_Char_ToLower(char ch)
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// -------------------------------------------------------------------------------------------------
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DQN_API Dqn_String Dqn_String_Init(char const *str, Dqn_isize size)
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{
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Dqn_String result = {str, size};
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Dqn_String result = {};
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result.str_ = str;
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result.size = size;
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return result;
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}
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DQN_API Dqn_b32 Dqn_String_Compare(Dqn_String const lhs, Dqn_String const rhs)
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{
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Dqn_b32 result = false;
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@ -3871,6 +3802,232 @@ DQN_API Dqn_u64 Dqn_FNV1A64_Hash(void const *bytes, Dqn_isize size)
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Dqn_u64 result = Dqn_FNV1A64_Iterate(bytes, size, DQN_FNV1A64_SEED);
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return result;
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}
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// -------------------------------------------------------------------------------------------------
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//
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// NOTE: Hashing - Dqn_MurmurHash3
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//
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// -------------------------------------------------------------------------------------------------
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#if defined(DQN_COMPILER_MSVC)
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#define DQN_MMH3_FORCE_INLINE __forceinline
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#define DQN_MMH3_ROTL32(x, y) _rotl(x, y)
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#define DQN_MMH3_ROTL64(x, y) _rotl64(x, y)
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#else
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#define DQN_MMH3_FORCE_INLINE inline __attribute__((always_inline))
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#define DQN_MMH3_ROTL32(x, y) ((x) << (y)) | ((x) >> (32 - (y)))
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#define DQN_MMH3_ROTL64(x, y) ((x) << (y)) | ((x) >> (64 - (y)))
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#endif
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//-----------------------------------------------------------------------------
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// Block read - if your platform needs to do endian-swapping or can only
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// handle aligned reads, do the conversion here
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DQN_MMH3_FORCE_INLINE Dqn_u32 Dqn_MurmurHash3__GetBlock32(Dqn_u32 const *p, int i)
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{
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return p[i];
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}
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DQN_MMH3_FORCE_INLINE Dqn_u64 Dqn_MurmurHash3__GetBlock64(Dqn_u64 const *p, int i)
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{
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return p[i];
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}
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//-----------------------------------------------------------------------------
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// Finalization mix - force all bits of a hash block to avalanche
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DQN_MMH3_FORCE_INLINE Dqn_u32 Dqn_MurmurHash3__FMix32(Dqn_u32 h)
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{
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h ^= h >> 16;
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h *= 0x85ebca6b;
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h ^= h >> 13;
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h *= 0xc2b2ae35;
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h ^= h >> 16;
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return h;
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}
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DQN_MMH3_FORCE_INLINE Dqn_u64 Dqn_MurmurHash3__FMix64(Dqn_u64 k)
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{
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k ^= k >> 33;
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k *= 0xff51afd7ed558ccd;
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k ^= k >> 33;
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k *= 0xc4ceb9fe1a85ec53;
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k ^= k >> 33;
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return k;
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}
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DQN_API Dqn_u32 Dqn_MurmurHash3_x86_32(void const *key, int len, Dqn_u32 seed)
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{
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const Dqn_u8 *data = (const Dqn_u8 *)key;
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const int nblocks = len / 4;
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Dqn_u32 h1 = seed;
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const Dqn_u32 c1 = 0xcc9e2d51;
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const Dqn_u32 c2 = 0x1b873593;
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//----------
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// body
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const Dqn_u32 *blocks = (const Dqn_u32 *)(data + nblocks * 4);
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for (int i = -nblocks; i; i++)
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{
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Dqn_u32 k1 = Dqn_MurmurHash3__GetBlock32(blocks, i);
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k1 *= c1;
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k1 = DQN_MMH3_ROTL32(k1, 15);
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k1 *= c2;
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h1 ^= k1;
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h1 = DQN_MMH3_ROTL32(h1, 13);
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h1 = h1 * 5 + 0xe6546b64;
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}
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//----------
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// tail
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const Dqn_u8 *tail = (const Dqn_u8 *)(data + nblocks * 4);
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Dqn_u32 k1 = 0;
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switch (len & 3)
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{
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case 3:
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k1 ^= tail[2] << 16;
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case 2:
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k1 ^= tail[1] << 8;
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case 1:
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k1 ^= tail[0];
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k1 *= c1;
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k1 = DQN_MMH3_ROTL32(k1, 15);
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k1 *= c2;
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h1 ^= k1;
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};
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//----------
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// finalization
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h1 ^= len;
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h1 = Dqn_MurmurHash3__FMix32(h1);
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return h1;
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}
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DQN_API Dqn_MurmurHash3_128 Dqn_MurmurHash3_x64_128(void const *key, int len, Dqn_u32 seed)
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{
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const Dqn_u8 *data = (const Dqn_u8 *)key;
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const int nblocks = len / 16;
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Dqn_u64 h1 = seed;
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Dqn_u64 h2 = seed;
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const Dqn_u64 c1 = 0x87c37b91114253d5;
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const Dqn_u64 c2 = 0x4cf5ad432745937f;
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//----------
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// body
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const Dqn_u64 *blocks = (const Dqn_u64 *)(data);
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for (int i = 0; i < nblocks; i++)
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{
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Dqn_u64 k1 = Dqn_MurmurHash3__GetBlock64(blocks, i * 2 + 0);
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Dqn_u64 k2 = Dqn_MurmurHash3__GetBlock64(blocks, i * 2 + 1);
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k1 *= c1;
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k1 = DQN_MMH3_ROTL64(k1, 31);
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k1 *= c2;
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h1 ^= k1;
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h1 = DQN_MMH3_ROTL64(h1, 27);
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h1 += h2;
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h1 = h1 * 5 + 0x52dce729;
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k2 *= c2;
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k2 = DQN_MMH3_ROTL64(k2, 33);
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k2 *= c1;
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h2 ^= k2;
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h2 = DQN_MMH3_ROTL64(h2, 31);
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h2 += h1;
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h2 = h2 * 5 + 0x38495ab5;
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}
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//----------
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// tail
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const Dqn_u8 *tail = (const Dqn_u8 *)(data + nblocks * 16);
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Dqn_u64 k1 = 0;
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Dqn_u64 k2 = 0;
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switch (len & 15)
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{
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case 15:
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k2 ^= ((Dqn_u64)tail[14]) << 48;
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case 14:
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k2 ^= ((Dqn_u64)tail[13]) << 40;
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case 13:
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k2 ^= ((Dqn_u64)tail[12]) << 32;
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case 12:
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k2 ^= ((Dqn_u64)tail[11]) << 24;
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case 11:
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k2 ^= ((Dqn_u64)tail[10]) << 16;
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case 10:
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k2 ^= ((Dqn_u64)tail[9]) << 8;
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case 9:
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k2 ^= ((Dqn_u64)tail[8]) << 0;
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k2 *= c2;
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k2 = DQN_MMH3_ROTL64(k2, 33);
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k2 *= c1;
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h2 ^= k2;
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case 8:
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k1 ^= ((Dqn_u64)tail[7]) << 56;
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case 7:
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k1 ^= ((Dqn_u64)tail[6]) << 48;
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case 6:
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k1 ^= ((Dqn_u64)tail[5]) << 40;
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case 5:
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k1 ^= ((Dqn_u64)tail[4]) << 32;
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case 4:
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k1 ^= ((Dqn_u64)tail[3]) << 24;
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case 3:
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k1 ^= ((Dqn_u64)tail[2]) << 16;
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case 2:
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k1 ^= ((Dqn_u64)tail[1]) << 8;
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case 1:
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k1 ^= ((Dqn_u64)tail[0]) << 0;
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k1 *= c1;
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k1 = DQN_MMH3_ROTL64(k1, 31);
|
||||
k1 *= c2;
|
||||
h1 ^= k1;
|
||||
};
|
||||
|
||||
//----------
|
||||
// finalization
|
||||
|
||||
h1 ^= len;
|
||||
h2 ^= len;
|
||||
|
||||
h1 += h2;
|
||||
h2 += h1;
|
||||
|
||||
h1 = Dqn_MurmurHash3__FMix64(h1);
|
||||
h2 = Dqn_MurmurHash3__FMix64(h2);
|
||||
|
||||
h1 += h2;
|
||||
h2 += h1;
|
||||
|
||||
Dqn_MurmurHash3_128 result = {};
|
||||
result.e[0] = h1;
|
||||
result.e[1] = h2;
|
||||
return result;
|
||||
}
|
||||
|
||||
//-----------------------------------------------------------------------------
|
||||
#endif // DQN_IMPLEMENTATION
|
||||
|
||||
#ifdef STB_SPRINTF_IMPLEMENTATION
|
||||
|
||||
Loading…
Reference in New Issue
Block a user