1 files changed, 60 insertions, 0 deletions
diff --git a/sys/etc/error.x b/sys/etc/error.x
new file mode 100644
index 00000000..42c390b5
--- /dev/null
+++ b/sys/etc/error.x
@@ -0,0 +1,60 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<error.h>
+
+# ERROR -- Take an error action.  A call to ERROR does not necessarily
+# terminate task execution, i.e., if an IFERR error handler is posted it
+# will receive control after the procedure call stack is unwound back
+# to the procedure containing the error handler.
+
+procedure error (error_code, message)
+
+int	error_code		# positive error code identifying error
+char	message[ARB]		# error message describing error
+include	"error.com"
+
+begin
+	if (xerflg) {					# error already posted?
+	    if (max(error_code,1) == xercod)
+		return					# same error again
+	    else
+		call erract (EA_FATAL)			# too many errors
+	}
+
+	call xeract (error_code, message, EA_ERROR)
+end
+
+
+# FATAL -- Called when a fatal (irrecoverable) error occurs.  Fatal errors
+# cannot be caught by IFERR handlers.  The calling task is terminated and
+# error recovery is initiated in the IRAF Main.
+
+procedure fatal (error_code, message)
+
+int	error_code		# positive error code identifying error
+char	message[ARB]		# error message describing error
+
+begin
+	call xeract (error_code, message, EA_FATAL)
+end
+
+
+# XERACT -- Take an error action; called by ERROR or FATAL.
+
+procedure xeract (error_code, message, severity)
+
+int	error_code		# positive error code identifying error
+char	message[ARB]		# error message describing error
+int	severity		# severity of the error
+include	"error.com"
+
+begin
+	xerflg = true					# post error
+	xercod = max (1, error_code)
+	call strcpy (message, xermsg, SZ_XERMSG)
+
+	if (nhandlers > 0 && severity == EA_ERROR)	# is a handler posted?
+	    return
+	else
+	    call erract (severity)			# take error action
+end