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Implemented 'Toy_Table' hashtable with robin hood algorithm, untested

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This commit is contained in:
Kayne Ruse
2024-10-03 16:33:47 +10:00
parent a0d616f412
commit 5cf2e70b7d
6 changed files with 266 additions and 2 deletions
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47
source/toy_value.c
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@@ -8,7 +8,7 @@ bool Toy_private_isTruthy(Toy_Value value) {
//null is an error
if (TOY_VALUE_IS_NULL(value)) {
fprintf(stderr, TOY_CC_ERROR "ERROR: 'null' is neither true nor false\n" TOY_CC_RESET);
exit(-1); //TODO: return false or exit()?
exit(-1); //TODO: #127
}
//only 'false' is falsy
@@ -62,3 +62,48 @@ bool Toy_private_isEqual(Toy_Value left, Toy_Value right) {
exit(-1);
}
}
//hash utils
static unsigned int hashCString(const char* string) {
unsigned int hash = 2166136261u;
for (unsigned int i = 0; string[i]; i++) {
hash *= string[i];
hash ^= 16777619;
}
return hash;
}
static unsigned int hashUInt(unsigned int x) {
x = ((x >> 16) ^ x) * 0x45d9f3b;
x = ((x >> 16) ^ x) * 0x45d9f3b;
x = (x >> 16) ^ x;
return x;
}
unsigned int Toy_hashValue(Toy_Value value) {
switch(value.type) {
case TOY_VALUE_NULL:
return 0;
case TOY_VALUE_BOOLEAN:
return TOY_VALUE_AS_BOOLEAN(value) ? 1 : 0;
case TOY_VALUE_INTEGER:
return hashUInt(TOY_VALUE_AS_INTEGER(value));
case TOY_VALUE_FLOAT:
return hashUInt( *((int*)(&TOY_VALUE_AS_FLOAT(value))) );
case TOY_VALUE_STRING:
case TOY_VALUE_ARRAY:
case TOY_VALUE_DICTIONARY:
case TOY_VALUE_FUNCTION:
case TOY_VALUE_OPAQUE:
default:
fprintf(stderr, TOY_CC_ERROR "ERROR: Can't hash an unknown type %d\n" TOY_CC_RESET, value.type);
exit(-1);
}
}