Release calc version 2.11.2t1

help/interrupt

@@ -15,13 +15,10 @@ Interrupts
 	    [Abort level n]
 
     where n ranges from 1 to 3.	 For n equal to 1, the calculator will
-    abort calculations at the next statement boundary specified by an
-    ABORT opcode as described below.  For n equal to 2, the calculator
-    will abort calculations at the next opcode boundary.  For n equal to 3,
-    the calculator will abort calculations at the next attempt to allocate
-    memory for the result of an integer arithmetic operation; this
-    level may be appropriate for stopping a builtin operation like
-    inversion of a large matrix.
+    abort calculations at the next statement boundary.	For n equal to 2,
+    the calculator will abort calculations at the next opcode boundary.
+    For n equal to 3, the calculator will abort calculations at the next
+    lowest level arithmetic operation boundary.
 
     If a final interrupt is given when n is 3, the calculator will
     immediately abort the current calculation and longjmp back to the
@@ -30,77 +27,8 @@ Interrupts
     be done as a last resort.  You are advised to quit the calculator
     after this has been done.
 
-ABORT opcodes
-
-    If config("trace") & 2 is zero, ABORT opcodes are introduced at
-    various places in the opcodes for evaluation of command lines
-    and functions defined by "define ... { ... }" commands.  In the
-    following, config("trace") has been set equal to 8 so that opcodes
-    are displayed when a function is defined.   The function f(x)
-    evaluates x + (x - 1) + (x - 2) + ... until a zero term is
-    encountered.  If f() is called with a negative or fractional x,
-    the calculation is never completed and to stop it, an interruption
-    (on many systems, by ctrl-C) will be necessary.
-
-	> config("trace", 8),
-	> define f(x) {local s; while (x) {s += x--} return s}
-	0: DEBUG line 2
-	2: PARAMADDR x
-	4: JUMPZ 19
-	6: DEBUG line 2
-	8: LOCALADDR s
-	10: DUPLICATE
-	11: PARAMADDR x
-	13: POSTDEC
-	14: POP
-	15: ADD
-	16: ASSIGNPOP
-	17: JUMP 2
-	19: DEBUG line 2
-	21: LOCALADDR s
-	23: RETURN
-	f(x) defined
-
-    (The line number following DEBUG refers to the line in the file
-    from which the definition is read.)   If an attempt is made to
-    evaluate f(-1), the effect of the DEBUG at opcode 6 ensures that
-    a single SIGINT will stop the calculation at a start of
-    {s += x--} loop.  In interactive mode, with ^C indicating
-    input of ctrl-C, the displayed output is as in:
-
-	> f(-1)
-	^C
-	[Abort level 1]
-	"f": line 2: Calculation aborted at statement boundary
-
-    The DEBUG opcodes are disabled by nonzero config("trace") & 2.
-    Changing config("trace") to achieve this, and defining g(x) with
-    the same definition as for f(x) gives:
-
-	> define g(x) {local s; while (x) {s += x--} return s}
-	0: PARAMADDR x
-	2: JUMPZ 15
-	4: LOCALADDR s
-	6: DUPLICATE
-	7: PARAMADDR x
-	9: POSTDEC
-	10: POP
-	11: ADD
-	12: ASSIGNPOP
-	13: JUMP 0
-	15: LOCALADDR s
-	17: RETURN
-	g(x) defined
-
-    If g(-1) is called, two interrupts are necessary, as in:
-
-	> g(-1)
-	^C
-	[Abort level 1]
-	^C
-	[Abort level 2]
-	"g": Calculation aborted in opcode
-
+## Copyright (C) 1999  Landon Curt Noll
+##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License
 ## as published by the Free Software Foundation.
@@ -115,8 +43,8 @@ ABORT opcodes
 ## received a copy with calc; if not, write to Free Software Foundation, Inc.
 ## 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
 ##
-## @(#) $Revision: 29.4 $
-## @(#) $Id: interrupt,v 29.4 2000/07/17 15:38:52 chongo Exp $
+## @(#) $Revision: 29.2 $
+## @(#) $Id: interrupt,v 29.2 2000/06/07 14:02:33 chongo Exp $
 ## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/interrupt,v $
 ##
 ## Under source code control:	1991/07/21 04:37:21