vc-insert-file

vc-insert-file is a compiled Lisp function in `vc-hooks.el'.

(vc-insert-file FILE &optional LIMIT BLOCKSIZE)

Insert the contents of FILE into the current buffer.

Optional argument LIMIT is a regexp. If present, the file is inserted
in chunks of size BLOCKSIZE (default 8 kByte), until the first
occurrence of LIMIT is found. Anything from the start of that occurrence
to the end of the buffer is then deleted. The function returns
non-nil if FILE exists and its contents were successfully inserted.