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46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
#pragma once
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#include "toy_common.h"
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#include "toy_value.h"
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//key-value entry, and probe sequence length - https://programming.guide/robin-hood-hashing.html
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typedef struct Toy_TableEntry { //32 | 64 BITNESS
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Toy_Value key; //8 | 8
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Toy_Value value; //8 | 8
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unsigned int psl; //4 | 4
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} Toy_TableEntry; //20 | 20
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//key-value table
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typedef struct Toy_Table { //32 | 64 BITNESS
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unsigned int capacity; //4 | 4
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unsigned int count; //4 | 4
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unsigned int minPsl; //4 | 4
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unsigned int maxPsl; //4 | 4
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Toy_TableEntry data[]; //- | -
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} Toy_Table; //16 | 16
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TOY_API Toy_Table* Toy_allocateTable(void);
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TOY_API void Toy_freeTable(Toy_Table* table);
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TOY_API void Toy_insertTable(Toy_Table** tableHandle, Toy_Value key, Toy_Value value);
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TOY_API Toy_Value Toy_lookupTable(Toy_Table** tableHandle, Toy_Value key);
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TOY_API void Toy_removeTable(Toy_Table** tableHandle, Toy_Value key);
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//NOTE: exposed to skip unnecessary allocations within Toy_Scope
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TOY_API Toy_Table* Toy_private_adjustTableCapacity(Toy_Table* oldTable, unsigned int newCapacity); //TODO: make it public
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TOY_API Toy_TableEntry* Toy_private_lookupTableEntryPtr(Toy_Table** tableHandle, Toy_Value key); //TODO: make it public?
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//some useful sizes, could be swapped out as needed
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#ifndef TOY_TABLE_INITIAL_CAPACITY
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#define TOY_TABLE_INITIAL_CAPACITY 8
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#endif
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//NOTE: The DOOM hack needs a power of 2
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#ifndef TOY_TABLE_EXPANSION_RATE
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#define TOY_TABLE_EXPANSION_RATE 2
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#endif
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//expand when the contents passes a certain percentage (80%) of the capacity
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#ifndef TOY_TABLE_EXPANSION_THRESHOLD
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#define TOY_TABLE_EXPANSION_THRESHOLD 0.8f
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#endif
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