damus

commit b5ad3ed1a5697d78d19936f4008f1cdc333c29a2
parent 371e9fb4065a9e23f16868cd61eab19c435673de
Author: William Casarin <jb55@jb55.com>
Date:   Wed, 27 Dec 2023 12:40:50 -0800

nostrdb/cursor: add pull_varint_u32

This is a varint helper that doesn't pull larger than uint32

Signed-off-by: William Casarin <jb55@jb55.com>

Diffstat:
M
nostrdb/src/cursor.h
 | 
13
+++++++++++++

1 file changed, 13 insertions(+), 0 deletions(-)
diff --git a/nostrdb/src/cursor.h b/nostrdb/src/cursor.h
@@ -332,6 +332,19 @@ static inline int cursor_pull_varint(struct cursor *cursor, uint64_t *n)
 	return 10; // Successfully read 10 bytes for a full 64-bit integer
 }
 
+static int cursor_pull_varint_u32(struct cursor *cursor, uint32_t *v)
+{
+	uint64_t bigval;
+
+	if (!cursor_pull_varint(cursor, &bigval))
+		return 0;
+
+	if (bigval > UINT32_MAX)
+		return 0;
+
+	*v = (uint32_t) bigval;
+	return 1;
+}
 
 static inline int cursor_pull_int(struct cursor *cursor, int *i)
 {