diff options
Diffstat (limited to 'sys/fio/fdevbf.x')
| -rw-r--r-- | sys/fio/fdevbf.x | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sys/fio/fdevbf.x b/sys/fio/fdevbf.x new file mode 100644 index 00000000..beba8d4b --- /dev/null +++ b/sys/fio/fdevbf.x @@ -0,0 +1,37 @@ +# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc. + +include <syserr.h> +include <config.h> +include <fio.h> + +# FDEVBF -- Install a new binary file device in the device table, if it has +# not already been installed. + +procedure fdevbf (zard, zawr, zawt, zstt, zcls) + +int i, dev_epa +extern zard(), zawr(), zawt(), zstt(), zcls() +include <fio.com> + +begin + # Search the device table to see if the device is already installed. + # The ZDEV array indices the EPA of the read procedure of each device + # driver. + + call zlocpr (zard, 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 device table. + next_dev = next_dev + LEN_DTE + if (next_dev > LEN_DEVTBL) + call syserr (SYS_FDEVTBLOVFL) + else { + call zlocpr (zard, zdev[i]) + call zlocpr (zawr, zdev[i+1]) + call zlocpr (zawt, zdev[i+2]) + call zlocpr (zstt, zdev[i+3]) + call zlocpr (zcls, zdev[i+4]) + } +end |