X-Git-Url: https://git.distorted.org.uk/~mdw/secnet/blobdiff_plain/ceb05e5ddbc5f140b1320c29a8b5841e61bc8250..6a06198cde5b96686304a9814dd7aa241adcb448:/util.h

diff --git a/util.h b/util.h
index 1f43c5e..5866e57 100644
--- a/util.h
+++ b/util.h
@@ -29,6 +29,11 @@ extern void *buf_prepend(struct buffer_if *buf, int32_t amount);
 extern void *buf_unappend(struct buffer_if *buf, int32_t amount);
 extern void *buf_unprepend(struct buffer_if *buf, int32_t amount);
 
+static inline int32_t buf_remaining_space(const struct buffer_if *buf)
+{
+    return (buf->base + buf->alloclen) - (buf->start + buf->size);
+}
+
 extern void buffer_readonly_view(struct buffer_if *n, const void*, int32_t len);
 extern void buffer_readonly_clone(struct buffer_if *n, const struct buffer_if*);
   /* Caller must only use unappend, unprepend et al. on n.