diff --git a/gb.hpp b/gb.hpp index 2dbd6ee..56d7bc6 100644 --- a/gb.hpp +++ b/gb.hpp @@ -1,7 +1,9 @@ -// gb.hpp - v0.02 - public domain C++11 helper library - no warranty implied; use at your own risk +// gb.hpp - v0.04 - public domain C++11 helper library - no warranty implied; use at your own risk // (Experimental) A C++11 helper library without STL geared towards game development // // Version History: +// 0.04 - String +// 0.03 - Hash Functions // 0.02 - Hash Table // 0.01 - Initial Version // @@ -29,8 +31,10 @@ // - Heap_Allocator // - Arena_Allocator // - Temporary_Arena_Memory +// - String // - Array // - Hash_Table +// - Hash Functions // - Math Types // - Vector(2,3,4) // - Quaternion @@ -111,21 +115,11 @@ #define GB_IS_POWER_OF_TWO(x) ((x) != 0) && !((x) & ((x) - 1)) -#ifndef NDEBUG -#define GB_ASSERT(x, ...) ((void)(gb__assert_handler((x), #x, __FILE__, __LINE__, ##__VA_ARGS__))) -#else -#define GB_ASSERT(x, ...) ((void)sizeof(x)) -#endif - -extern "C" void -gb__assert_handler(bool condition, const char* condition_str, - const char* filename, size_t line, - const char* error_text = nullptr, ...); - #include #include #include #include +#include #ifdef GB_SYSTEM_WINDOWS #include @@ -133,6 +127,36 @@ gb__assert_handler(bool condition, const char* condition_str, #include #endif +#ifndef NDEBUG +#define GB_ASSERT(x, ...) ((void)(gb__assert_handler((x), #x, __FILE__, __LINE__, ##__VA_ARGS__))) +#else +#define GB_ASSERT(x, ...) ((void)sizeof(x)) +#endif + +extern "C" inline void +gb__assert_handler(bool condition, const char* condition_str, + const char* filename, size_t line, + const char* error_text = nullptr, ...) +{ + if (condition) + return; + + fprintf(stderr, "ASSERT! %s(%d): %s", filename, line, condition_str); + if (error_text) + { + fprintf(stderr, " - "); + + va_list args; + va_start(args, error_text); + vfprintf(stderr, error_text, args); + va_end(args); + } + fprintf(stderr, "\n"); + + abort(); +} + + namespace gb { //////////////////////////////// @@ -407,6 +431,44 @@ make_temporary_arena_memory(Arena_Allocator& arena) return Temporary_Arena_Memory{arena}; } +//////////////////////////////// +/// String /// +//////////////////////////////// +using String = char*; +using String_Size = u32; +struct String_Header +{ + Allocator* allocator; + String_Size len; + String_Size cap; +}; + +inline String_Header* string_header(String str) { return (String_Header*)str - 1; } + +String make_string(Allocator& a, const char* str = ""); +String make_string(Allocator& a, const void* str, String_Size len); +void free_string(String& str); + +String duplicate_string(Allocator& a, const String str); + +String_Size string_length(const String str); +String_Size string_capacity(const String str); +String_Size string_available_space(const String str); + +void clear_string(String str); + +void append_string(String& str, const String other); +void append_cstring(String& str, const char* other); +void append_string(String& str, const void* other, String_Size len); + +void string_make_space_for(String& str, String_Size add_len); +usize string_allocation_size(const String str); + +bool strings_are_equal(const String lhs, const String rhs); + +void trim_string(String& str, const char* cut_set); + + //////////////////////////////// /// Array /// //////////////////////////////// @@ -991,6 +1053,27 @@ remove_all_from_hash_table(Hash_Table& h, u64 key) remove(h, key); } +//////////////////////////////// +/// Hash /// +//////////////////////////////// + +namespace hash +{ +u32 adler32(const void* key, usize num_bytes); + +u32 crc32(const void* key, usize num_bytes); +u64 crc64(const void* key, usize num_bytes); + +// TODO(bill): Complete hashing functions +// u32 fnv32(const void* key, usize num_bytes); +// u64 fnv64(const void* key, usize num_bytes); +// u32 fnv32a(const void* key, usize num_bytes); +// u64 fnv64a(const void* key, usize num_bytes); + +u32 murmur32(const void* key, u32 num_bytes, u32 seed = 0x9747b28c); +u64 murmur64(const void* key, usize num_bytes, u64 seed = 0x9747b28c); +} // namespace hash + //////////////////////////////// /// Time /// //////////////////////////////// @@ -1464,31 +1547,6 @@ look_at_quaternion(const Vector3& eye, const Vector3& center, const Vector3& up #include #endif -inline void -gb__assert_handler(bool condition, const char* condition_str, - const char* filename, size_t line, - const char* error_text, ...) -{ - if (condition) - return; - - fprintf(stderr, "ASSERT! %s(%d): %s", filename, line, condition_str); - if (error_text) - { - fprintf(stderr, " - "); - - va_list args; - va_start(args, error_text); - vfprintf(stderr, error_text, args); - va_end(args); - } - fprintf(stderr, "\n"); - - *(int*)0 = 0; // TODO(bill): Use a better way to assert -} - - - namespace gb { //////////////////////////////// @@ -1665,6 +1723,558 @@ void Arena_Allocator::check() GB_ASSERT(temp_count == 0); } +//////////////////////////////// +/// String /// +//////////////////////////////// +String make_string(Allocator& a, const char* str) +{ + return make_string(a, str, (String_Size)strlen(str)); +} + +String make_string(Allocator& a, const void* init_str, String_Size len) +{ + usize header_size = sizeof(String_Header); + void* ptr = alloc(a, header_size + len + 1); + if (!init_str) + memset(ptr, 0, header_size + len + 1); + + if (ptr == nullptr) + return nullptr; + + String str = (char*)ptr + header_size; + String_Header* header = string_header(str); + header->allocator = &a; + header->len = len; + header->cap = len; + if (len && init_str) + memcpy(str, init_str, len); + str[len] = '\0'; + + return str; +} + + +void free_string(String& str) +{ + if (str == nullptr) + return; + String_Header* h = string_header(str); + Allocator* a = h->allocator; + if (a) dealloc(*a, h); + str = nullptr; +} + +String duplicate_string(Allocator& a, const String str) +{ + return make_string(a, str, string_length(str)); +} + +String_Size string_length(const String str) +{ + return string_header(str)->len; +} + +String_Size string_capacity(const String str) +{ + return string_header(str)->cap; +} + +String_Size string_available_space(const String str) +{ + String_Header* h = string_header(str); + if (h->cap > h->len) + return h->cap - h->len; + return 0; +} + +void clear_string(String str) +{ + string_header(str)->len = 0; + str[0] = '\0'; +} + +void append_string(String& str, const String other) +{ + append_string(str, (const void*)other, string_length(other)); +} + +void append_cstring(String& str, const char* other) +{ + append_string(str, (const void*)other, (String_Size)strlen(other)); +} + +void append_string(String& str, const void* other, String_Size other_len) +{ + String_Size curr_len = string_length(str); + + string_make_space_for(str, other_len); + if (str == nullptr) + return; + + memcpy(str + curr_len, other, other_len); + str[curr_len + other_len] = '\0'; + string_header(str)->len = curr_len + other_len; +} + + +namespace impl +{ +// NOTE(bill): ptr _must_ be allocated with Allocator& a +static inline void* +string_realloc(Allocator& a, void* ptr, usize old_size, usize new_size) +{ + if (!ptr) + return alloc(a, new_size); + + if (new_size < old_size) + new_size = old_size; + + if (old_size == new_size) + return ptr; + + void* new_ptr = alloc(a, new_size); + if (!new_ptr) + return nullptr; + + memcpy(new_ptr, ptr, old_size); + + dealloc(a, ptr); + + return new_ptr; +} +} // namespace impl + +void string_make_space_for(String& str, String_Size add_len) +{ + String_Size len = string_length(str); + String_Size new_len = len + add_len; + + String_Size available = string_available_space(str); + if (available >= add_len) // Return if there is enough space left + return; + + void* ptr = (String_Header*)str - 1; + usize old_size = sizeof(String_Header) + string_length(str) + 1; + usize new_size = sizeof(String_Header) + new_len + 1; + + Allocator* a = string_header(str)->allocator; + void* new_ptr = impl::string_realloc(*a, ptr, old_size, new_size); + if (new_ptr == nullptr) + return; + str = (char*)new_ptr + sizeof(String_Header); + + string_header(str)->cap = new_len; +} + +usize string_allocation_size(const String str) +{ + String_Size cap = string_capacity(str); + return sizeof(String_Header) + cap; +} + +bool strings_are_equal(const String lhs, const String rhs) +{ + String_Size lhs_len = string_length(lhs); + String_Size rhs_len = string_length(rhs); + if (lhs_len != rhs_len) + return false; + + for (String_Size i = 0; i < lhs_len; i++) + { + if (lhs[i] != rhs[i]) + return false; + } + + return true; +} + +void trim_string(String& str, const char* cut_set) +{ + char* start; + char* end; + char* start_pos; + char* end_pos; + + start_pos = start = str; + end_pos = end = str + string_length(str) - 1; + + while (start_pos <= end && strchr(cut_set, *start_pos)) + start_pos++; + while (end_pos > start_pos && strchr(cut_set, *end_pos)) + end_pos--; + + String_Size len = (start_pos > end_pos) ? 0 : ((end_pos - start_pos)+1); + + if (str != start_pos) + memmove(str, start_pos, len); + str[len] = '\0'; + + string_header(str)->len = len; +} + + +//////////////////////////////// +/// Hash /// +//////////////////////////////// + +namespace hash +{ +u32 adler32(const void* key, usize num_bytes) +{ + const u32 MOD_ADLER = 65521; + + u32 a = 1; + u32 b = 0; + + const u8* bytes = (const u8*)key; + for (usize i = 0; i < num_bytes; i++) + { + a = (a + bytes[i]) % MOD_ADLER; + b = (b + a) % MOD_ADLER; + } + + return (b << 16) | a; +} + +static const u32 GB_CRC32_TABLE[256] = { + 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, + 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, + 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, + 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, + 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, + 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, + 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, + 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, + 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, + 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, + 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, + 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, + 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, + 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, + 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, + 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, + 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, + 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, + 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, + 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, + 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, + 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, + 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, + 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, + 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, + 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, + 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, + 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, + 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, + 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, + 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, + 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, + 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, + 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, + 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, + 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, + 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, + 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, + 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, + 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, + 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, + 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, + 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, + 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, + 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, + 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, + 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, + 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, + 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, + 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, + 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, + 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, + 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, + 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, + 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, + 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, + 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, + 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, + 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, + 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, + 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, + 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, + 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, + 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, +}; + +static const u64 GB_CRC64_TABLE[256] = { + 0x0000000000000000ull, 0x42F0E1EBA9EA3693ull, 0x85E1C3D753D46D26ull, 0xC711223CFA3E5BB5ull, + 0x493366450E42ECDFull, 0x0BC387AEA7A8DA4Cull, 0xCCD2A5925D9681F9ull, 0x8E224479F47CB76Aull, + 0x9266CC8A1C85D9BEull, 0xD0962D61B56FEF2Dull, 0x17870F5D4F51B498ull, 0x5577EEB6E6BB820Bull, + 0xDB55AACF12C73561ull, 0x99A54B24BB2D03F2ull, 0x5EB4691841135847ull, 0x1C4488F3E8F96ED4ull, + 0x663D78FF90E185EFull, 0x24CD9914390BB37Cull, 0xE3DCBB28C335E8C9ull, 0xA12C5AC36ADFDE5Aull, + 0x2F0E1EBA9EA36930ull, 0x6DFEFF5137495FA3ull, 0xAAEFDD6DCD770416ull, 0xE81F3C86649D3285ull, + 0xF45BB4758C645C51ull, 0xB6AB559E258E6AC2ull, 0x71BA77A2DFB03177ull, 0x334A9649765A07E4ull, + 0xBD68D2308226B08Eull, 0xFF9833DB2BCC861Dull, 0x388911E7D1F2DDA8ull, 0x7A79F00C7818EB3Bull, + 0xCC7AF1FF21C30BDEull, 0x8E8A101488293D4Dull, 0x499B3228721766F8ull, 0x0B6BD3C3DBFD506Bull, + 0x854997BA2F81E701ull, 0xC7B97651866BD192ull, 0x00A8546D7C558A27ull, 0x4258B586D5BFBCB4ull, + 0x5E1C3D753D46D260ull, 0x1CECDC9E94ACE4F3ull, 0xDBFDFEA26E92BF46ull, 0x990D1F49C77889D5ull, + 0x172F5B3033043EBFull, 0x55DFBADB9AEE082Cull, 0x92CE98E760D05399ull, 0xD03E790CC93A650Aull, + 0xAA478900B1228E31ull, 0xE8B768EB18C8B8A2ull, 0x2FA64AD7E2F6E317ull, 0x6D56AB3C4B1CD584ull, + 0xE374EF45BF6062EEull, 0xA1840EAE168A547Dull, 0x66952C92ECB40FC8ull, 0x2465CD79455E395Bull, + 0x3821458AADA7578Full, 0x7AD1A461044D611Cull, 0xBDC0865DFE733AA9ull, 0xFF3067B657990C3Aull, + 0x711223CFA3E5BB50ull, 0x33E2C2240A0F8DC3ull, 0xF4F3E018F031D676ull, 0xB60301F359DBE0E5ull, + 0xDA050215EA6C212Full, 0x98F5E3FE438617BCull, 0x5FE4C1C2B9B84C09ull, 0x1D14202910527A9Aull, + 0x93366450E42ECDF0ull, 0xD1C685BB4DC4FB63ull, 0x16D7A787B7FAA0D6ull, 0x5427466C1E109645ull, + 0x4863CE9FF6E9F891ull, 0x0A932F745F03CE02ull, 0xCD820D48A53D95B7ull, 0x8F72ECA30CD7A324ull, + 0x0150A8DAF8AB144Eull, 0x43A04931514122DDull, 0x84B16B0DAB7F7968ull, 0xC6418AE602954FFBull, + 0xBC387AEA7A8DA4C0ull, 0xFEC89B01D3679253ull, 0x39D9B93D2959C9E6ull, 0x7B2958D680B3FF75ull, + 0xF50B1CAF74CF481Full, 0xB7FBFD44DD257E8Cull, 0x70EADF78271B2539ull, 0x321A3E938EF113AAull, + 0x2E5EB66066087D7Eull, 0x6CAE578BCFE24BEDull, 0xABBF75B735DC1058ull, 0xE94F945C9C3626CBull, + 0x676DD025684A91A1ull, 0x259D31CEC1A0A732ull, 0xE28C13F23B9EFC87ull, 0xA07CF2199274CA14ull, + 0x167FF3EACBAF2AF1ull, 0x548F120162451C62ull, 0x939E303D987B47D7ull, 0xD16ED1D631917144ull, + 0x5F4C95AFC5EDC62Eull, 0x1DBC74446C07F0BDull, 0xDAAD56789639AB08ull, 0x985DB7933FD39D9Bull, + 0x84193F60D72AF34Full, 0xC6E9DE8B7EC0C5DCull, 0x01F8FCB784FE9E69ull, 0x43081D5C2D14A8FAull, + 0xCD2A5925D9681F90ull, 0x8FDAB8CE70822903ull, 0x48CB9AF28ABC72B6ull, 0x0A3B7B1923564425ull, + 0x70428B155B4EAF1Eull, 0x32B26AFEF2A4998Dull, 0xF5A348C2089AC238ull, 0xB753A929A170F4ABull, + 0x3971ED50550C43C1ull, 0x7B810CBBFCE67552ull, 0xBC902E8706D82EE7ull, 0xFE60CF6CAF321874ull, + 0xE224479F47CB76A0ull, 0xA0D4A674EE214033ull, 0x67C58448141F1B86ull, 0x253565A3BDF52D15ull, + 0xAB1721DA49899A7Full, 0xE9E7C031E063ACECull, 0x2EF6E20D1A5DF759ull, 0x6C0603E6B3B7C1CAull, + 0xF6FAE5C07D3274CDull, 0xB40A042BD4D8425Eull, 0x731B26172EE619EBull, 0x31EBC7FC870C2F78ull, + 0xBFC9838573709812ull, 0xFD39626EDA9AAE81ull, 0x3A28405220A4F534ull, 0x78D8A1B9894EC3A7ull, + 0x649C294A61B7AD73ull, 0x266CC8A1C85D9BE0ull, 0xE17DEA9D3263C055ull, 0xA38D0B769B89F6C6ull, + 0x2DAF4F0F6FF541ACull, 0x6F5FAEE4C61F773Full, 0xA84E8CD83C212C8Aull, 0xEABE6D3395CB1A19ull, + 0x90C79D3FEDD3F122ull, 0xD2377CD44439C7B1ull, 0x15265EE8BE079C04ull, 0x57D6BF0317EDAA97ull, + 0xD9F4FB7AE3911DFDull, 0x9B041A914A7B2B6Eull, 0x5C1538ADB04570DBull, 0x1EE5D94619AF4648ull, + 0x02A151B5F156289Cull, 0x4051B05E58BC1E0Full, 0x87409262A28245BAull, 0xC5B073890B687329ull, + 0x4B9237F0FF14C443ull, 0x0962D61B56FEF2D0ull, 0xCE73F427ACC0A965ull, 0x8C8315CC052A9FF6ull, + 0x3A80143F5CF17F13ull, 0x7870F5D4F51B4980ull, 0xBF61D7E80F251235ull, 0xFD913603A6CF24A6ull, + 0x73B3727A52B393CCull, 0x31439391FB59A55Full, 0xF652B1AD0167FEEAull, 0xB4A25046A88DC879ull, + 0xA8E6D8B54074A6ADull, 0xEA16395EE99E903Eull, 0x2D071B6213A0CB8Bull, 0x6FF7FA89BA4AFD18ull, + 0xE1D5BEF04E364A72ull, 0xA3255F1BE7DC7CE1ull, 0x64347D271DE22754ull, 0x26C49CCCB40811C7ull, + 0x5CBD6CC0CC10FAFCull, 0x1E4D8D2B65FACC6Full, 0xD95CAF179FC497DAull, 0x9BAC4EFC362EA149ull, + 0x158E0A85C2521623ull, 0x577EEB6E6BB820B0ull, 0x906FC95291867B05ull, 0xD29F28B9386C4D96ull, + 0xCEDBA04AD0952342ull, 0x8C2B41A1797F15D1ull, 0x4B3A639D83414E64ull, 0x09CA82762AAB78F7ull, + 0x87E8C60FDED7CF9Dull, 0xC51827E4773DF90Eull, 0x020905D88D03A2BBull, 0x40F9E43324E99428ull, + 0x2CFFE7D5975E55E2ull, 0x6E0F063E3EB46371ull, 0xA91E2402C48A38C4ull, 0xEBEEC5E96D600E57ull, + 0x65CC8190991CB93Dull, 0x273C607B30F68FAEull, 0xE02D4247CAC8D41Bull, 0xA2DDA3AC6322E288ull, + 0xBE992B5F8BDB8C5Cull, 0xFC69CAB42231BACFull, 0x3B78E888D80FE17Aull, 0x7988096371E5D7E9ull, + 0xF7AA4D1A85996083ull, 0xB55AACF12C735610ull, 0x724B8ECDD64D0DA5ull, 0x30BB6F267FA73B36ull, + 0x4AC29F2A07BFD00Dull, 0x08327EC1AE55E69Eull, 0xCF235CFD546BBD2Bull, 0x8DD3BD16FD818BB8ull, + 0x03F1F96F09FD3CD2ull, 0x41011884A0170A41ull, 0x86103AB85A2951F4ull, 0xC4E0DB53F3C36767ull, + 0xD8A453A01B3A09B3ull, 0x9A54B24BB2D03F20ull, 0x5D45907748EE6495ull, 0x1FB5719CE1045206ull, + 0x919735E51578E56Cull, 0xD367D40EBC92D3FFull, 0x1476F63246AC884Aull, 0x568617D9EF46BED9ull, + 0xE085162AB69D5E3Cull, 0xA275F7C11F7768AFull, 0x6564D5FDE549331Aull, 0x279434164CA30589ull, + 0xA9B6706FB8DFB2E3ull, 0xEB46918411358470ull, 0x2C57B3B8EB0BDFC5ull, 0x6EA7525342E1E956ull, + 0x72E3DAA0AA188782ull, 0x30133B4B03F2B111ull, 0xF7021977F9CCEAA4ull, 0xB5F2F89C5026DC37ull, + 0x3BD0BCE5A45A6B5Dull, 0x79205D0E0DB05DCEull, 0xBE317F32F78E067Bull, 0xFCC19ED95E6430E8ull, + 0x86B86ED5267CDBD3ull, 0xC4488F3E8F96ED40ull, 0x0359AD0275A8B6F5ull, 0x41A94CE9DC428066ull, + 0xCF8B0890283E370Cull, 0x8D7BE97B81D4019Full, 0x4A6ACB477BEA5A2Aull, 0x089A2AACD2006CB9ull, + 0x14DEA25F3AF9026Dull, 0x562E43B4931334FEull, 0x913F6188692D6F4Bull, 0xD3CF8063C0C759D8ull, + 0x5DEDC41A34BBEEB2ull, 0x1F1D25F19D51D821ull, 0xD80C07CD676F8394ull, 0x9AFCE626CE85B507ull, +}; + + +u32 crc32(const void* key, usize num_bytes) +{ + u32 result = (u32)~0; + u8* c = (u8*)key; + for (usize remaining = num_bytes; remaining--; c++) + result = (result >> 8) ^ (GB_CRC32_TABLE[(result ^ *c) & 0xff]); + + return ~result; +} + +u64 crc64(const void* key, usize num_bytes) +{ + u64 result = (u64)~0; + u8* c = (u8*)key; + for (usize remaining = num_bytes; remaining--; c++) + result = (result >> 8) ^ (GB_CRC64_TABLE[(result ^ *c) & 0xff]); + + return ~result; +} + +// u32 fnv32(const void* key, usize num_bytes) +// { + +// } + +// u64 fnv64(const void* key, usize num_bytes) +// { + +// } + +// u32 fnv32a(const void* key, usize num_bytes) +// { + +// } + +// u64 fnv64a(const void* key, usize num_bytes) +// { + +// } + +u32 murmur32(const void* key, u32 num_bytes, u32 seed) +{ + static const u32 c1 = 0xcc9e2d51; + static const u32 c2 = 0x1b873593; + static const u32 r1 = 15; + static const u32 r2 = 13; + static const u32 m = 5; + static const u32 n = 0xe6546b64; + + u32 hash = seed; + + const usize nblocks = num_bytes / 4; + const u32* blocks = (const u32*)key; + for (usize i = 0; i < nblocks; i++) { + u32 k = blocks[i]; + k *= c1; + k = (k << r1) | (k >> (32 - r1)); + k *= c2; + + hash ^= k; + hash = ((hash << r2) | (hash >> (32 - r2))) * m + n; + } + + const u8* tail = ((const u8*)key) + nblocks * 4; + u32 k1 = 0; + + switch (num_bytes & 3) { + case 3: + k1 ^= tail[2] << 16; + case 2: + k1 ^= tail[1] << 8; + case 1: + k1 ^= tail[0]; + + k1 *= c1; + k1 = (k1 << r1) | (k1 >> (32 - r1)); + k1 *= c2; + hash ^= k1; + } + + hash ^= num_bytes; + hash ^= (hash >> 16); + hash *= 0x85ebca6b; + hash ^= (hash >> 13); + hash *= 0xc2b2ae35; + hash ^= (hash >> 16); + + return hash; +} + +#ifdef GB_ARCH_64_BIT +u64 murmur64(const void* key, usize num_bytes, u64 seed) +{ + static const u64 m = 0xc6a4a7935bd1e995ULL; + static const s32 r = 47; + + u64 h = seed ^ (num_bytes * m); + + const u64* data = (const u64*)key; + const u64* end = data + (num_bytes / 8); + + while (data != end) + { + u64 k = *data++; + + k *= m; + k ^= k >> r; + k *= m; + + h ^= k; + h *= m; + } + + const u8* data2 = (const u8*)data; + + switch (num_bytes & 7) + { + case 7: h ^= u64{data2[6]} << 48; + case 6: h ^= u64{data2[5]} << 40; + case 5: h ^= u64{data2[4]} << 32; + case 4: h ^= u64{data2[3]} << 24; + case 3: h ^= u64{data2[2]} << 16; + case 2: h ^= u64{data2[1]} << 8; + case 1: h ^= u64{data2[0]}; + h *= m; + }; + + h ^= h >> r; + h *= m; + h ^= h >> r; + + return h; +} +#elif GB_ARCH_32_BIT +u64 murmur64(const void* key, usize num_bytes, u64 seed) +{ + static const u32 m = 0x5bd1e995; + static const s32 r = 24; + + u32 h1 = u32(seed) ^ num_bytes; + u32 h2 = u32(seed >> 32); + + const u32* data = (const u32*)key; + + while (num_bytes >= 8) + { + u32 k1 = *data++; + k1 *= m; + k1 ^= k1 >> r; + k1 *= m; + h1 *= m; + h1 ^= k1; + num_bytes -= 4; + + u32 k2 = *data++; + k2 *= m; + k2 ^= k2 >> r; + k2 *= m; + h2 *= m; + h2 ^= k2; + num_bytes -= 4; + } + + if (num_bytes >= 4) + { + u32 k1 = *data++; + k1 *= m; + k1 ^= k1 >> r; + k1 *= m; + h1 *= m; + h1 ^= k1; + num_bytes -= 4; + } + + switch (num_bytes) + { + case 3: h2 ^= ((u8*)data)[2] << 16; + case 2: h2 ^= ((u8*)data)[1] << 8; + case 1: h2 ^= ((u8*)data)[0]; + h2 *= m; + }; + + h1 ^= h2 >> 18; + h1 *= m; + h2 ^= h1 >> 22; + h2 *= m; + h1 ^= h2 >> 17; + h1 *= m; + h2 ^= h1 >> 19; + h2 *= m; + + u64 h = h1; + + h = (h << 32) | h2; + + return h; + +} +#else +#error murmur64 function not supported on this architecture +#endif +} // namespace hash + + //////////////////////////////// /// Time ///