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Code Issues 1 Releases Wiki Activity

Improve hash function for numbers.

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This commit is contained in:
Calvin Rose
2020-12-26 15:38:04 -06:00
parent 7242ee0186
commit b4f242193d
3 changed files with 16 additions and 4 deletions
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7
src/core/value.c
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@@ -261,6 +261,13 @@ int32_t janet_hash(Janet x) {
case JANET_STRUCT:
hash = janet_struct_hash(janet_unwrap_struct(x));
break;
case JANET_NUMBER: {
uint64_t i = janet_u64(x);
uint32_t lo = (uint32_t)(i & 0xFFFFFFFF);
uint32_t hi = (uint32_t)(i >> 32);
hash = (int32_t)(hi ^ lo);
break;
}
case JANET_ABSTRACT: {
JanetAbstract xx = janet_unwrap_abstract(x);
const JanetAbstractType *at = janet_abstract_type(xx);