udebug: add functions for manipulating entry length

Can be used to reserve worst case length using udebug_entry_append,
then setting the final length using udebug_entry_set_length

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 2 insertions, 0 deletions

diff --git a/udebug.h b/udebug.h
index d24dbfc..75c2e3f 100644
--- a/udebug.h
+++ b/udebug.h
@@ -157,6 +157,8 @@ int udebug_entry_printf(struct udebug_buf *buf, const char *fmt, ...)
 	__attribute__ ((format (printf, 2, 3)));
 int udebug_entry_vprintf(struct udebug_buf *buf, const char *fmt, va_list ap)
 	__attribute__ ((format (printf, 2, 0)));
+uint16_t udebug_entry_trim(struct udebug_buf *buf, uint16_t len);
+void udebug_entry_set_length(struct udebug_buf *buf, uint16_t len);
 void udebug_entry_add(struct udebug_buf *buf);
 
 int udebug_buf_init(struct udebug_buf *buf, size_t entries, size_t size);