shithub: hmap

Info  •  Files  •  Log

attempt actual int hashing

Prototyping for what could end up as a 'default' for ints

--- a/hash.h

+++ b/hash.h

@@ -8,6 +8,7 @@

 struct Hmap {

 	uvlong (*hash)(void*);

 	int (*cmp)(void*,void*);

+

 	int nbs;

 	int nsz;

--- a/test.c

+++ b/test.c

@@ -62,9 +62,14 @@

 uvlong

 runehash(void *p)

 {

+	uvlong s;

 	Hkey k;

+

 	k.p = p;

-	return k.v;

+	s = 2654435761L;

+	s *= 1<<sizeof(p);

+	s *= k.v;

+	return s>>sizeof(p);

 }

 int

@@ -82,6 +87,8 @@

 	Hmap *h;

 	char *v;

 	char *p, *p2;

+	char keys[] = "abcdefghijklmnopqrstuvwxyz";

+	int i;

 	h = hmapalloc(runehash, runecmp, 16, sizeof(char*));

@@ -90,6 +97,11 @@

 	assert(hmapset(&h, k.p, &v, nil) == 0);

 	assert(hmapset(&h, k.p, &v, &p2) == 1);

 	assert(p2 == v);

+

+	for(i=0; i < sizeof keys - 1; i++){

+		k.v = keys[i];

+		hmapset(&h, k.p, &v, nil);

+	}

 	assert(hmapget(h, k.p, &p) == 0);

 	assert(p && *p);