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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <xwhen.h>
include <syserr.h>
include <fset.h>
define SZ_ERRMSG SZ_LINE
# MA_IDEH -- Iraf Main routine which installs the default exception handler.
# A single handler processes all exceptions.
procedure ma_ideh()
extern xstdexh()
int junk, i, epa_standard_handler
int exception[4]
data exception /X_ACV, X_INT, X_ARITH, X_IPC/
begin
call zlocpr (xstdexh, epa_standard_handler)
do i = 1, 4
call xwhen (exception[i], epa_standard_handler, junk)
# Initialize the critical section protection stack.
call intr_reset()
end
# XSTDEXH -- Standard exception handler. Unless the user code posts a handler
# for a particular exception, this handler will gain control.
procedure xstdexh (exception, next_handler)
int exception # code for exception
int next_handler # EPA of next handler to be called
char os_errmsg[SZ_ERRMSG]
int os_errcode
begin
# Get OS description of the exception.
call zxgmes (os_errcode, os_errmsg, SZ_ERRMSG)
call strupk (os_errmsg, os_errmsg, SZ_ERRMSG)
# Cancel any output and resync awaits.
call fseti (STDOUT, F_CANCEL, OK)
call fseti (CLOUT, F_CANCEL, OK)
call fseti (CLIN, F_CANCEL, OK)
# Set this here as error() will return immediately if it comes back.
next_handler = X_IGNORE
# Take error action.
switch (exception) {
case X_ACV:
if (os_errcode > 0)
call fatal (SYS_XACV, os_errmsg)
else
call fatal (SYS_XACV, "Access violation")
case X_ARITH:
if (os_errcode > 0)
call fatal (SYS_XARITH, os_errmsg)
else
call fatal (SYS_XARITH, "Arithmetic exception")
case X_INT:
if (os_errcode > 0)
call fatal (SYS_XINT, os_errmsg)
else
call fatal (SYS_XINT, "Keyboard interrupt")
case X_IPC:
call fatal (SYS_XIPC, "Write to IPC with no reader")
default:
call fatal (ERR, "Unknown exception")
}
end
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