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fix janet_string_equalconst

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Check string length before pointer equality, so that a string is not considered
equal to a prefix slice of itself.
This commit is contained in:
Ian Henry 2024-11-16 21:20:26 -08:00
parent 9f4497a5ae
commit e2eb7ab4b2
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1 changed files with 2 additions and 2 deletions
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src/core/string.c
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@ -71,10 +71,10 @@ int janet_string_compare(const uint8_t *lhs, const uint8_t *rhs) {
int janet_string_equalconst(const uint8_t *lhs, const uint8_t *rhs, int32_t rlen, int32_t rhash) { int janet_string_equalconst(const uint8_t *lhs, const uint8_t *rhs, int32_t rlen, int32_t rhash) {
int32_t lhash = janet_string_hash(lhs); int32_t lhash = janet_string_hash(lhs);
int32_t llen = janet_string_length(lhs); int32_t llen = janet_string_length(lhs);
if (lhs == rhs)
return 1;
if (lhash != rhash || llen != rlen) if (lhash != rhash || llen != rlen)
return 0; return 0;
if (lhs == rhs)
return 1;
return !memcmp(lhs, rhs, rlen); return !memcmp(lhs, rhs, rlen);
} }