Isolate some hash-string building nastyness in cache_hash.c

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3434 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_center.c

@@ -586,28 +586,12 @@ static int
 cnt_lookup(struct sess *sp)
 {
 	struct object *o;
-	char *p;
-	uintptr_t u;
 
 	CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
 	CHECK_OBJ_NOTNULL(sp->vcl, VCL_CONF_MAGIC);
 
 	if (sp->obj == NULL) {
-
-		/* Allocate the pointers we need, align properly. */
-		sp->lhashptr = 1;	/* space for NUL */
-		sp->ihashptr = 0;
-		sp->nhashptr = sp->vcl->nhashcount * 2;
-		p = WS_Alloc(sp->http->ws,
-		    sizeof(const char *) * (sp->nhashptr + 1));
-		XXXAN(p);
-		/* Align pointer properly (?) */
-		u = (uintptr_t)p;
-		u &= sizeof(const char *) - 1;
-		if (u)
-			p += sizeof(const char *) - u;
-		sp->hashptr = (void*)p;
-
+		HSH_Prepare(sp, sp->vcl->nhashcount);
 		VCL_hash_method(sp);
 		assert(sp->handling == VCL_RET_HASH);
 	}

bin/varnishd/cache_hash.c

@@ -201,6 +201,48 @@ HSH_Copy(const struct sess *sp, struct objhead *oh)
 	assert(b <= oh->hash + oh->hashlen);
 }
 
+void
+HSH_Prepare(struct sess *sp, unsigned nhashcount)
+{
+	char *p;
+	unsigned u;
+
+	/* Allocate the pointers we need, align properly. */
+	sp->lhashptr = 1;       /* space for NUL */
+	sp->ihashptr = 0;
+	sp->nhashptr = nhashcount * 2;
+	p = WS_Alloc(sp->http->ws, sizeof(const char *) * (sp->nhashptr + 1));
+	XXXAN(p);
+	/* Align pointer properly (?) */
+	u = (uintptr_t)p;
+	u &= sizeof(const char *) - 1;
+	if (u)
+		p += sizeof(const char *) - u;
+	sp->hashptr = (void*)p;
+}
+
+void
+HSH_AddString(struct sess *sp, const char *str)
+{
+	int l;
+
+	if (str == NULL)
+		str = "";
+	l = strlen(str);
+
+	/*
+	* XXX: handle this by bouncing sp->vcl->nhashcount when it fails
+	* XXX: and dispose of this request either by reallocating the
+	* XXX: hashptr (if possible) or restarting/error the request
+	*/
+	xxxassert(sp->ihashptr < sp->nhashptr);
+
+	sp->hashptr[sp->ihashptr] = str;
+	sp->hashptr[sp->ihashptr + 1] = str + l;
+	sp->ihashptr += 2;
+	sp->lhashptr += l + 1;
+}
+
 struct object *
 HSH_Lookup(struct sess *sp)
 {

bin/varnishd/cache_vrt.c

@@ -585,23 +585,8 @@ VRT_r_server_port(struct sess *sp)
 void
 VRT_l_req_hash(struct sess *sp, const char *str)
 {
-	int l;
 
-	if (str == NULL)
-		str = "";
-	l = strlen(str);
-
-	/*
-	 * XXX: handle this by bouncing sp->vcl->nhashcount when it fails
-	 * XXX: and dispose of this request either by reallocating the
-	 * XXX: hashptr (if possible) or restarting/error the request
-	 */
-	xxxassert(sp->ihashptr < sp->nhashptr);
-
-	sp->hashptr[sp->ihashptr] = str;
-	sp->hashptr[sp->ihashptr + 1] = str + l;
-	sp->ihashptr += 2;
-	sp->lhashptr += l + 1;
+	HSH_AddString(sp, str);
 }
 
 /*--------------------------------------------------------------------*/

bin/varnishd/hash_slinger.h

@@ -59,6 +59,8 @@ void HSH_Ref(struct object *o);
 void HSH_Deref(struct object *o);
 double HSH_Grace(double g);
 void HSH_Init(void);
+void HSH_AddString(struct sess *sp, const char *str);
+void HSH_Prepare(struct sess *sp, unsigned hashcount);
 
 
 #ifdef VARNISH_CACHE_CHILD