diff options
Diffstat (limited to 'sys/plio/plvalid.x')
| -rw-r--r-- | sys/plio/plvalid.x | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/sys/plio/plvalid.x b/sys/plio/plvalid.x new file mode 100644 index 00000000..1d6482d9 --- /dev/null +++ b/sys/plio/plvalid.x @@ -0,0 +1,22 @@ +# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc. + +include <syserr.h> +include <plio.h> + +# PLVALID -- Verify the validity of a mask descriptor. + +procedure plvalid (pl) + +pointer pl #I open mask descriptor +errchk syserr + +begin + if (pl != NULL) + if (PL_MAGIC(pl) == PL_MAGICVAL) + if (PL_LLBP(pl) == NULL) + call syserr (SYS_PLINACTDES) + else + return + + call syserr (SYS_PLINVDES) +end |