Number: 829

Date: 24-Apr-84 17':08':22

Submitter: Sannella.PA

Source: Stansbury.pa

Subject: New Library package': MesaTypes

Lisp Version: 

Description: '
Date': 18 Apr 84 16':54 PST'
From': Stansbury.pa'
Subject': New Lispcore>Library package': MesaTypes'
To': Lispcore^, Lispsupport, Sheil, Cooper, Purcell'
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Announcing a new Lispcore>Library package': MesaTypes'
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By Tayloe Stansbury with help from Richard Burton.'
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This package introduces three new clisprecordtypes which allow you to describe any block of bits with an arbitrarily nested datatype.  You can define multidimensional, nonstandardly indexed arrays with multi-word elements; records with multi-word fields; and multi-word types.  Special accessfns cover up the necessary \BLTs and LOCFs.  Appropriate create methods are automatically provided.  The package also provides a number of macros for manipulating instances of such types.  '
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Anyone who wants to use graceful datatypes to describe some arbitrary chunk of memory (e.g. ethernet, rs232, nsfiling, any file system)  will probably find this package useful; most of the 1108 file system now depends on it.  People translating Mesa system code into Lisp will find it particularly useful.'
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This message is stored as Lispcore>Library>MesaTypes.tedit.  Proper external documentation of this package will follow release of the 1108 file system.  Extensive examples of its use can be found in the first few pages of stansbury>newdlionfs>dlionfs.'
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-- Tayloe.

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Subsystem: Record Package

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Difficulty: Hard

Frequency: Everytime

Impact: Moderate

Priority: Perhaps

Status: Fixed

Problem Type: Performance

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