From: Amaury Denoyelle <adenoyelle@haproxy.com>
Date: Thu, 16 Oct 2025 14:41:24 +0000 (+0200)
Subject: MINOR: ncbuf2: implement init / is_empty
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d13073a9309ef8d18947b8db90de91eb003dc11b;p=thirdparty%2Fhaproxy.git

MINOR: ncbuf2: implement init / is_empty
---

diff --git a/include/haproxy/ncbuf2.h b/include/haproxy/ncbuf2.h
index 7220b4e78..40b2586c6 100644
--- a/include/haproxy/ncbuf2.h
+++ b/include/haproxy/ncbuf2.h
@@ -9,6 +9,7 @@ static inline int ncb2_is_null(const struct ncbuf2 *buf)
 	return buf->size == 0;
 }
 
+void ncb2_init(struct ncbuf2 *buf, ncb2_sz_t head);
 struct ncbuf2 ncb2_make(char *area, ncb2_sz_t size, ncb2_sz_t head);
 
 static inline char *ncb2_orig(const struct ncbuf2 *buf)
@@ -34,6 +35,8 @@ static inline ncb2_sz_t ncb2_size(const struct ncbuf2 *buf)
 	return buf->size;
 }
 
+int ncb2_is_empty(const struct ncbuf2 *buf);
+
 ncb2_sz_t ncb2_data(const struct ncbuf2 *buf, ncb2_sz_t offset);
 
 enum ncb_ret ncb2_add(struct ncbuf2 *buf, ncb2_sz_t off,
diff --git a/src/ncbuf2.c b/src/ncbuf2.c
index ba1a6ab61..f396a6372 100644
--- a/src/ncbuf2.c
+++ b/src/ncbuf2.c
@@ -132,6 +132,15 @@ static void bit_unset(unsigned char *value, char i)
 
 /* ******** public API ******** */
 
+void ncb2_init(struct ncbuf2 *buf, ncb2_sz_t head)
+{
+	BUG_ON_HOT(ncb2_is_null(buf));
+
+	BUG_ON_HOT(head >= buf->size);
+	buf->head = head;
+	memset(buf->bitmap, 0, buf->bitmap_sz);
+}
+
 struct ncbuf2 ncb2_make(char *area, ncb2_sz_t size, ncb2_sz_t head)
 {
 	struct ncbuf2 buf;
@@ -158,8 +167,17 @@ ncb2_sz_t ncb2_total_data(const struct ncbuf2 *buf)
 
 int ncb2_is_empty(const struct ncbuf2 *buf)
 {
-	/* TODO */
-	return 0;
+	size_t i = 0;
+
+	if (ncb2_is_null(buf))
+		return 1;
+
+	for (i = 0; i < buf->bitmap_sz; ++i) {
+		if (buf->bitmap[i])
+			return 0;
+	}
+
+	return 1;
 }
 
 int ncb2_is_full(const struct ncbuf2 *buf)