摘要:

AbstractThere are several successful operating systems for mini‐computers written in high level languages and the time is now ripe for the development of portable systems for such machines. The system described in this paper is primarily designed to provide a friendly interactive multiprocessing environment for a single user. From his point of view, substantial parts of the system are completely machine independent. These include, for instance, the filing system, the command language, text editors, overlaying facilities and interprocess communication primitives. The system is suitable for many different application areas ranging over process control, data acquisition, data communication, text handling, data base systems and teachin

ISSN:0038-0644    

DOI:10.1002/spe.4380090702

出版商:John Wiley&Sons, Ltd.    

年代:1979

数据来源: WILEY

摘要:

AbstractThis paper describes a simple compiler and interpreter for a finite state machine recognizer of patterns represented by regular expressions. The algorithm is designed to be compact and to require little work space.

ISSN:0038-0644    

DOI:10.1002/spe.4380090703

出版商:John Wiley&Sons, Ltd.    

年代:1979

数据来源: WILEY

摘要:

AbstractThis paper describes a software trace facility (STF) developed to provide data about the flow of control between modules of the IBM System/360 operating system OS/MVT. The motivation for STF is discussed and a brief Introduction to OS/MVT presented to show how STF interfaces with the operating system.The output of the program is illustrated and some details of the program logic are discussed together with the tracing options available to the user. The paper then describes some potential applications.

ISSN:0038-0644    

DOI:10.1002/spe.4380090704

出版商:John Wiley&Sons, Ltd.    

年代:1979

数据来源: WILEY

摘要:

AbstractThis paper describes SIMPL‐D, a stack‐based language with data abstraction features, and some of the details of its implementation. The language allows users to define new types that are parameterized by size and to perform system‐defined operations (e.g. assignment) on objects with user‐defined types. The use of object‐describing templates in the implementation of storage allocation, assignment and returning values from functions is discussed. Finally, the conflicts between automatic initialization and separate compilation are

ISSN:0038-0644    

DOI:10.1002/spe.4380090705

出版商:John Wiley&Sons, Ltd.    

年代:1979

数据来源: WILEY

摘要:

AbstractThis paper describes some of the problems incurred when transporting the SOLO operating system from a PDP 11/45 to a smaller Modular One. Some comments are made about the intrinsic portability of operating systems written in high level languages and their flexibility in use.

ISSN:0038-0644    

DOI:10.1002/spe.4380090706

出版商:John Wiley&Sons, Ltd.    

年代:1979

数据来源: WILEY

摘要:

AbstractIn some compilers, long identifiers are truncated, or lower case letters are converted to upper case. Such respellings can make two distinct identifiers appear identical, and under unfavourable circumstances no warning or error messages will be generated. The use of different respelling algorithms in different compilers is a hindrance to transporting software, and is a source of latent bugs. This short note suggests avoiding the problem by generating warning messages when a potentially ambiguous spelling is used in a declaration. The technique involves hashing the character and case‐shift bits that would otherwise be thrown away. A program that compiles without warning messages can be safely transporte

ISSN:0038-0644    

DOI:10.1002/spe.4380090707

出版商:John Wiley&Sons, Ltd.    

年代:1979

数据来源: WILEY

摘要:

AbstractRequirements are formulated for a tag‐list algorithm, i.e. the algorithm used in a compiler for handling the symbol table or identifier list. Starting from a very general tag‐list algorithm, 18 practical versions are developed and their merits judged. Although the final choice (binary search in a diluted table) depends on the details of the application, the main part of this article is not devoted to that final choice itself but rather to ways of reaching

ISSN:0038-0644    

DOI:10.1002/spe.4380090708

出版商:John Wiley&Sons, Ltd.    

年代:1979

数据来源: WILEY

ISSN:0038-0644    

DOI:10.1002/spe.4380090709

出版商:John Wiley&Sons, Ltd.    

年代:1979

数据来源: WILEY

ISSN:0038-0644    

DOI:10.1002/spe.4380090710

出版商:John Wiley&Sons, Ltd.    

年代:1979

数据来源: WILEY

ISSN:0038-0644    

DOI:10.1002/spe.4380090711

出版商:John Wiley&Sons, Ltd.    

年代:1979

数据来源: WILEY