buf API changes.

- rename kore_buf_destroy() to kore_buf_cleanup().
- rename kore_buf_create() to kore_buf_alloc().

includes/kore.h

@@ -622,12 +622,12 @@ void		net_send_stream(struct connection *, void *,
 		    size_t, int (*cb)(struct netbuf *), struct netbuf **);
 
 void		kore_buf_free(struct kore_buf *);
-struct kore_buf	*kore_buf_create(size_t);
+struct kore_buf	*kore_buf_alloc(size_t);
 void		kore_buf_init(struct kore_buf *, size_t);
 void		kore_buf_append(struct kore_buf *, const void *, size_t);
 u_int8_t	*kore_buf_release(struct kore_buf *, size_t *);
 void		kore_buf_reset(struct kore_buf *);
-void		kore_buf_destroy(struct kore_buf *);
+void		kore_buf_cleanup(struct kore_buf *);
 
 char	*kore_buf_stringify(struct kore_buf *, size_t *);
 void	kore_buf_appendf(struct kore_buf *, const char *, ...);

src/buf.c

@@ -22,7 +22,7 @@
 #include "kore.h"
 
 struct kore_buf *
-kore_buf_create(size_t initial)
+kore_buf_alloc(size_t initial)
 {
 	struct kore_buf		*buf;
 
@@ -35,7 +35,11 @@ kore_buf_create(size_t initial)
 void
 kore_buf_init(struct kore_buf *buf, size_t initial)
 {
-	buf->data = kore_malloc(initial);
+	if (initial > 0)
+		buf->data = kore_malloc(initial);
+	else
+		buf->data = NULL;
+
 	buf->length = initial;
 	buf->offset = 0;
 }
@@ -47,7 +51,7 @@ kore_buf_append(struct kore_buf *buf, const void *d, size_t len)
 		fatal("overflow in kore_buf_append");
 
 	if ((buf->offset + len) > buf->length) {
-		buf->length += len + KORE_BUF_INCREMENT;
+		buf->length += len;
 		buf->data = kore_realloc(buf->data, buf->length);
 	}
 
@@ -133,7 +137,7 @@ kore_buf_free(struct kore_buf *buf)
 }
 
 void
-kore_buf_destroy(struct kore_buf *buf)
+kore_buf_cleanup(struct kore_buf *buf)
 {
 	if (buf->data)
 		kore_free(buf->data);