doc: ffi-in offset argument description missing.

* txr.1: Document the offset argument of the ffi-in operation.

1 files changed, 9 insertions, 1 deletions

diff --git a/txr.1 b/txr.1
index 7c34fb88..83fe303b 100644
--- a/txr.1
+++ b/txr.1
@@ -64714,7 +64714,7 @@ will be stored in the buffer.
 
 .coNP Function @ ffi-in
 .synb
-.mets (ffi-in < src-buf < obj < type << copy-p )
+.mets (ffi-in < src-buf < obj < type < copy-p <> [ offset ])
 .syne
 .desc
 The
@@ -64775,6 +64775,14 @@ is has a variable length, then the actual size of the foreign representation is
 calculated from
 .metn obj .
 
+The optional
+.meta offset
+argument specifies a byte offset from the beginning of the data area of
+.meta src-buf
+from which the foreign-representation of
+.meta obj
+is taken.
+
 The
 .code ffi-in
 function returns either