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Improve hash function for names.

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PiperOrigin-RevId: 619173787
Change-Id: I7889ea71ebe7bdbe682042842c521d6631521a35
This commit is contained in:
Yuval Tassa
2024-03-26 06:49:58 -07:00
committed by Copybara-Service
parent 709719911e
commit fa8893b443
3 changed files with 5 additions and 5 deletions
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src/engine/engine_support.c
+3 -3
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@@ -1050,11 +1050,11 @@ static int _getnumadr(const mjModel* m, mjtObj type, int** padr, int* mapadr) {
}
// get string hash, see http://www.cse.yorku.ca/~oz/hash.html
uint64_t mj_hashdjb2(const char* s, uint64_t n) {
uint64_t mj_hashString(const char* s, uint64_t n) {
uint64_t h = 5381;
int c;
while ((c = *s++)) {
h = ((h << 5) + h) + c;
h = ((h << 5) + h) ^ c;
}
return h % n;
}
@@ -1070,7 +1070,7 @@ int mj_name2id(const mjModel* m, int type, const char* name) {
// search
if (num) { // look up at hash address
uint64_t hash = mj_hashdjb2(name, num);
uint64_t hash = mj_hashString(name, num);
uint64_t i = hash;
do {