rcs_patchfile
if ((diffb = rcs_patchfile(data, dlen, patch, plen, ed_patch_lines)) == NULL)
if ((diffb = rcs_patchfile(data, dlen, patch, plen, ed_patch_lines)) == NULL)
rbuf = rcs_patchfile(data, dlen, patch, plen, rcs_patch_lines);
BUF *rcs_patchfile(u_char *, size_t, u_char *, size_t,