usr/src/usr.bin/pascal/px/px.1

.\" Copyright (c) 1980, 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\"	@(#)px.1	6.7 (Berkeley) 5/9/91
.\"
.Dd May 9, 1991
.Dt PX 1
.Os BSD 3.0
.Sh NAME
.Nm \&px
.Nd Pascal interpreter
.Sh SYNOPSIS
.Nm \&px
.Op  Ar obj Op Ar argument ...
.Sh DESCRIPTION
.Nm \&Px
interprets the abstract machine code generated by
.Xr pi 1 .
The first argument is the file to be interpreted, and defaults
to
.Ar obj ;
remaining arguments are available to the Pascal program using the
built-ins
.Ar argv
and
.Ar argc .
.Nm \&Px
is also invoked by
.Nm pix
when running `load and go'.
.Pp
If the program terminates abnormally an error message and a
control flow backtrace are printed.
The number of statements executed and total execution time
are printed after normal termination.
The
.Cm p
option of
.Nm \&pi
suppresses all of this except the message indicating the cause
of abnormal termination.
.Sh FILES
.Bl -tag -width pmon.out -compact
.It Pa obj
default object file
.It Pa pmon.out
profile data file
.El
.Sh SEE ALSO
.Xr pi 1 ,
.Xr pix 1
.Rs
.%T "Berkeley Pascal User's Manual"
.Re
.Sh DIAGNOSTICS
Most run-time error messages are self-explanatory.
Some of the more unusual ones are:
.Bl -tag -width indent
.It Reference to an inactive file
A file other than
.Ar input
or
.Ar output
was used before a call to
.Ar reset
or
.Ar rewrite .
.It Statement count limit exceeded
The limit of 500,000 executed statements
(which prevents excessive looping or recursion)
has been exceeded.
.It Bad data found on integer read
.It Bad data found on real read
Usually, non-numeric input was found for a number.
For reals, Pascal requires digits before and after the decimal
point so that numbers like `.1' or `21.' evoke the second diagnostic.
.It panic: Em Some message
Indicates an internal inconsistency detected in
.Nm \&px
probably due to a Pascal system bug.
.El
.Sh HISTORY
.Nm \&Px
appeared in
.Bx 3.0 .
.Sh BUGS
Post-mortem traceback is not limited;
infinite recursion leads to almost infinite traceback.
Commit	Line	Data
	1	.\" Copyright (c) 1980, 1990 The Regents of the University of California.
	2	.\" All rights reserved.
	3	.\"
	4	.\" Redistribution and use in source and binary forms, with or without
	5	.\" modification, are permitted provided that the following conditions
	6	.\" are met:
	7	.\" 1. Redistributions of source code must retain the above copyright
	8	.\" notice, this list of conditions and the following disclaimer.
	9	.\" 2. Redistributions in binary form must reproduce the above copyright
	10	.\" notice, this list of conditions and the following disclaimer in the
	11	.\" documentation and/or other materials provided with the distribution.
	12	.\" 3. All advertising materials mentioning features or use of this software
	13	.\" must display the following acknowledgement:
	14	.\" This product includes software developed by the University of
	15	.\" California, Berkeley and its contributors.
	16	.\" 4. Neither the name of the University nor the names of its contributors
	17	.\" may be used to endorse or promote products derived from this software
	18	.\" without specific prior written permission.
	19	.\"
	20	.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	21	.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	24	.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	.\" SUCH DAMAGE.
	31	.\"
	32	.\" @(#)px.1 6.7 (Berkeley) 5/9/91
	33	.\"
	34	.Dd May 9, 1991
	35	.Dt PX 1
	36	.Os BSD 3.0
	37	.Sh NAME
	38	.Nm \&px
	39	.Nd Pascal interpreter
	40	.Sh SYNOPSIS
	41	.Nm \&px
	42	.Op Ar obj Op Ar argument ...
	43	.Sh DESCRIPTION
	44	.Nm \&Px
	45	interprets the abstract machine code generated by
	46	.Xr pi 1 .
	47	The first argument is the file to be interpreted, and defaults
	48	to
	49	.Ar obj ;
	50	remaining arguments are available to the Pascal program using the
	51	built-ins
	52	.Ar argv
	53	and
	54	.Ar argc .
	55	.Nm \&Px
	56	is also invoked by
	57	.Nm pix
	58	when running `load and go'.
	59	.Pp
	60	If the program terminates abnormally an error message and a
	61	control flow backtrace are printed.
	62	The number of statements executed and total execution time
	63	are printed after normal termination.
	64	The
	65	.Cm p
	66	option of
	67	.Nm \&pi
	68	suppresses all of this except the message indicating the cause
	69	of abnormal termination.
	70	.Sh FILES
	71	.Bl -tag -width pmon.out -compact
	72	.It Pa obj
	73	default object file
	74	.It Pa pmon.out
	75	profile data file
	76	.El
	77	.Sh SEE ALSO
	78	.Xr pi 1 ,
	79	.Xr pix 1
	80	.Rs
	81	.%T "Berkeley Pascal User's Manual"
	82	.Re
	83	.Sh DIAGNOSTICS
	84	Most run-time error messages are self-explanatory.
	85	Some of the more unusual ones are:
	86	.Bl -tag -width indent
	87	.It Reference to an inactive file
	88	A file other than
	89	.Ar input
	90	or
	91	.Ar output
	92	was used before a call to
	93	.Ar reset
	94	or
	95	.Ar rewrite .
	96	.It Statement count limit exceeded
	97	The limit of 500,000 executed statements
	98	(which prevents excessive looping or recursion)
	99	has been exceeded.
	100	.It Bad data found on integer read
	101	.It Bad data found on real read
	102	Usually, non-numeric input was found for a number.
	103	For reals, Pascal requires digits before and after the decimal
	104	point so that numbers like `.1' or `21.' evoke the second diagnostic.
	105	.It panic: Em Some message
	106	Indicates an internal inconsistency detected in
	107	.Nm \&px
	108	probably due to a Pascal system bug.
	109	.El
	110	.Sh HISTORY
	111	.Nm \&Px
	112	appeared in
	113	.Bx 3.0 .
	114	.Sh BUGS
	115	Post-mortem traceback is not limited;
	116	infinite recursion leads to almost infinite traceback.