buffers: expose sub-buf and replace-buf.

* buf.c (buf_init): Intrinsics sub-buf and replace-buf
registered.

* txr.1: Documented.

1 files changed, 2 insertions, 0 deletions

diff --git a/buf.c b/buf.c
index 506ac45a..910d7801 100644
--- a/buf.c
+++ b/buf.c
@@ -1075,6 +1075,8 @@ void buf_init(void)
   reg_fun(intern(lit("length-buf"), user_package), func_n1(length_buf));
   reg_fun(intern(lit("buf-alloc-size"), user_package), func_n1(buf_alloc_size));
   reg_fun(intern(lit("copy-buf"), user_package), func_n1(copy_buf));
+  reg_fun(intern(lit("sub-buf"), user_package), func_n3(sub_buf));
+  reg_fun(intern(lit("replace-buf"), user_package), func_n4(replace_buf));
 
 #if HAVE_I8
   reg_fun(intern(lit("buf-put-i8"), user_package), func_n3(buf_put_i8));