shithub: asif

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vec: fix reordering and look for space from head, not tail

--- a/vec.c

+++ b/vec.c

@@ -9,6 +9,10 @@

 	s->prev = v->vl.prev;

 	s->prev->next = s;

 	v->vl.prev = s;

+//	fprint(2, "%#p len %d link: ", v, v->len);

+//	for(s=v->vl.next; s!=&v->vl; s=s->next)

+//		fprint(2, "%#p[%d,%zd] → ", s, s->len, (s->head - s->p) / v->elsz);

+//	fprint(2, "%#p\n", &v->vl);

 }

 static void

@@ -18,6 +22,10 @@

 	s->head = s->p;

 	s->prev->next = s->next;

 	s->next->prev = s->prev;

+//	fprint(2, "%#p len %d link: ", v, v->len);

+//	for(s=v->vl.next; s!=&v->vl; s=s->next)

+//		fprint(2, "%#p[%d,%zd] → ", s, s->len, (s->head - s->p) / v->elsz);

+//	fprint(2, "%#p\n", &v->vl);

 }

 static VShard *

@@ -28,6 +36,7 @@

 	s = emalloc(sizeof *s);

 	s->p = emalloc(Shardsz * v->elsz);

 	s->head = s->p;

+//	fprint(2, "%#p len %d shard %#p\n", v, v->len, s);

 	shardlink(v, s);

 	return s;

 }

@@ -37,6 +46,7 @@

 {

 	VShard *s, *t;

+//	fprint(2, "%#p len %d free\n", v, v->len);

 	free(v->tmp);

 	for(s=v->vl.next; s!=&v->vl; s=t){

 		t = s->next;

@@ -50,7 +60,9 @@

 shardpop(Vector *v, VShard *s, int i)

 {

 	uchar *p;

+	VShard *t;

+//	fprint(2, "%#p len %d pop %#p[%d,%zd] i %d\n", v, v->len, s, s->len, (s->head - s->p) / v->elsz, i);

 	assert(s != &v->vl);

 	assert(i >= 0 && i < s->len);

 	p = s->head + i * v->elsz;

@@ -60,10 +72,10 @@

 	v->len--;

 	if(i == 0)

 		s->head += v->elsz;

-	if(s->len == 0){

-		shardunlink(v, s);

-		shardlink(v, s);

-	}

+	for(t=v->vl.next; t->len == 0 && t!=&v->vl; t=t->next){

+		shardunlink(v, t);

+		shardlink(v, t);

+	} 

 	assert(s->head >= s->p && s->head < s->p + Shardsz * v->elsz);

 	return v->tmp;

 }

@@ -76,6 +88,10 @@

 	if(v->len <= 0)

 		return nil;

 	s = v->vl.next;

+//	fprint(2, "vechpop %#p len %d s %#p len %d Δhead %zd prev %#p next %#p\n",

+//		v, v->len, s, s->len, s->head - s->p, s->prev, s->next);

+	/* FIXME: crash here with first el.len == 0; second .len == 64

+	 * moving source */

 	assert(s != &v->vl && s->len > 0 && s->head - s->p < Shardsz * v->elsz);

 	return shardpop(v, s, 0);

 }

@@ -89,6 +105,8 @@

 		return nil;

 	for(s=v->vl.prev; s != &v->vl && s->len == 0; s=s->prev)

 		;

+//	fprint(2, "vectpop %#p len %d s %#p len %d Δhead %zd prev %#p next %#p\n",

+//		v, v->len, s, s->len, s->head - s->p, s->prev, s->next);

 	assert(s != &v->vl);

 	return shardpop(v, s, s->len - 1);

 }

@@ -99,9 +117,10 @@

 	uchar *p;

 	VShard *s;

-	for(s=v->vl.prev; s != &v->vl; s=s->prev)

+	for(s=v->vl.next; s != &v->vl; s=s->next)

 		if(s->len + (s->head - s->p) / v->elsz < Shardsz)

 			break;

+//	fprint(2, "%#p len %d push s %#p[%d,%zd]\n", v, v->len, s, s->len, (s->head - s->p) / v->elsz);

 	if(s == &v->vl)

 		s = shard(v);

 	p = s->head + s->len * v->elsz;

-- 

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