From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 8 Jul 2015 20:46:52 -0400 Subject: Initial commit --- sys/fio/fdevtx.x | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 sys/fio/fdevtx.x (limited to 'sys/fio/fdevtx.x') diff --git a/sys/fio/fdevtx.x b/sys/fio/fdevtx.x new file mode 100644 index 00000000..65c02fc8 --- /dev/null +++ b/sys/fio/fdevtx.x @@ -0,0 +1,39 @@ +# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc. + +include +include +include + +# FDEVTX -- Install a new text file device in the device table, if it has +# not already been installed. + +procedure fdevtx (zget, zput, zfls, zstt, zcls, zsek, znot) + +int i, dev_epa +extern zget(), zput(), zfls(), zstt(), zcls(), zsek(), znot() +include + +begin + # Search the device table to determine if the device has already been + # installed. The ZDEV array indices the device table by the EPA of + # each device driver. + + call zlocpr (zget, dev_epa) + for (i=1; i < next_dev; i=i+LEN_DTE) + if (zdev[i] == dev_epa) + return + + # Device not found. Install the new device in the table. + next_dev = next_dev + LEN_DTE + if (next_dev > LEN_DEVTBL) + call syserr (SYS_FDEVTBLOVFL) + else { + call zlocpr (zget, zdev[i]) + call zlocpr (zput, zdev[i+1]) + call zlocpr (zfls, zdev[i+2]) + call zlocpr (zstt, zdev[i+3]) + call zlocpr (zcls, zdev[i+4]) + call zlocpr (zsek, zdev[i+5]) + call zlocpr (znot, zdev[i+6]) + } +end -- cgit