138 lines
4.0 KiB
Groff
138 lines
4.0 KiB
Groff
.\" Copyright (c) 1980, 1990 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)mkstr.1 6.6 (Berkeley) 5/9/91
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.\"
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.Dd May 9, 1991
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.Dt MKSTR 1
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.Os
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.Sh NAME
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.Nm mkstr
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.Nd create an error message file by massaging C source
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.Sh SYNOPSIS
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.Nm mkstr
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.Op Fl
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.Ar messagefile
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.Ar prefix file ...
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.Sh DESCRIPTION
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.Nm Mkstr
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creates files containing error messages extracted from C source,
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and restructures the same C source, to utilize the created error message
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file.
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The intent of
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.Nm mkstr
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was to reduce the size of large programs and
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reduce swapping (see
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.Sx BUGS
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section below).
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.Pp
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.Nm Mkstr
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processes each of the specified
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.Ar files ,
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placing a restructured version of the input in a file whose name
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consists of the specified
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.Ar prefix
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and the original name.
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A typical usage of
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.Nm mkstr
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is
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.Bd -literal -offset indent
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mkstr pistrings xx *.c
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.Ed
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.Pp
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This command causes all the error messages from the C source
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files in the current directory to be placed in the file
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.Ar pistrings
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and restructured copies of the sources to be placed in
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files whose names are prefixed with
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.Ar \&xx .
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.Pp
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Options:
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.Bl -tag -width indent
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.It Fl
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Error messages are placed at the end of the specified
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message file for recompiling part of a large
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.Nm mkstr
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ed
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program.
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.El
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.Pp
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.Nm mkstr
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finds error messages in the source by
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searching for the string
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.Li \&`error("'
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in the input stream.
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Each time it occurs, the C string starting at the
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.Sq \&"\&
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is stored
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in the message file followed by a null character and a new-line character;
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The new source is restructured with
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.Xr lseek 2
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pointers into the error message file for retrieval.
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.Bd -literal -offset indent
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char efilname = "/usr/lib/pi_strings";
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int efil = -1;
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error(a1, a2, a3, a4)
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\&{
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char buf[256];
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if (efil < 0) {
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efil = open(efilname, 0);
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if (efil < 0) {
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oops:
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perror(efilname);
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exit 1 ;
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}
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}
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if (lseek(efil, (long) a1, 0) \ read(efil, buf, 256) <= 0)
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goto oops;
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printf(buf, a2, a3, a4);
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}
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.Ed
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.Sh SEE ALSO
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.Xr lseek 2 ,
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.Xr xstr 1
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.Sh HISTORY
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.Nm Mkstr
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appeared in
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.Bx 3.0 .
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.Sh BUGS
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.Nm mkstr
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was intended for the limited architecture of the PDP 11 family.
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Very few programs actually use it. The pascal interpreter,
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.Xr \&pi 1
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and the editor,
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.Xr \&ex 1
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are two programs that are built this way.
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It is not an efficient method, the error messages
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should be stored in the program text.
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